CN106015996A - LED straight lamp - Google Patents

LED straight lamp Download PDF

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Publication number
CN106015996A
CN106015996A CN201610160152.7A CN201610160152A CN106015996A CN 106015996 A CN106015996 A CN 106015996A CN 201610160152 A CN201610160152 A CN 201610160152A CN 106015996 A CN106015996 A CN 106015996A
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CN
China
Prior art keywords
circuit
signal
couples
led
lamp
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610160152.7A
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Chinese (zh)
Inventor
刘新通
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiaxing Super Lighting Electric Appliance Co Ltd
Original Assignee
Jiaxing Super Lighting Electric Appliance Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Jiaxing Super Lighting Electric Appliance Co Ltd filed Critical Jiaxing Super Lighting Electric Appliance Co Ltd
Publication of CN106015996A publication Critical patent/CN106015996A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The invention provides an LED straight lamp. According to the LED straight lamp, the safety function that energizing is achieved only when two end covers of a lamp tube are put in a lamp holder of the lamp simultaneously is achieved, and the effect that installation personnel can avoid the danger of electric shock during installation is ensured. The LED straight lamp comprises the lamp tube, two lamp holders, a rectifying circuit, a filter circuit, an LED driving module and a detection module. The two lamp holders are each provided with a pin used for receiving an outside driving signal and are suitable for being connected with the two ends of the lamp tube correspondingly in a coupling mode. The rectifying circuit is used for rectifying the outside driving signal so as to generate a post-rectifying signal. The filter circuit is used for generating a post-filtering signal. The LED driving module is configured to generate a driving signal to make the LED straight lamp emit light. The detection module is used for determining whether the outside driving signal is stopped from flowing through the LED straight lamp and is provided with a first detection end and a second detection end. When an electric current flowing through the first detection end and the second detection end is higher than or equal to an electric current value, the detection module is switched on. When the electric current flowing through the first detection end and the second detection end is lower than the electric current value, the detection module is switched off.

Description

A kind of LED straight lamp
Technical field
The present invention relates to field of lighting appliances, be specifically related to a kind of LED straight lamp.
Background technology
LED illumination technology is just fast-developing and instead of traditional electric filament lamp and fluorescent lamp.For being filled with the fluorescent lamp of noble gas and hydrargyrum, LED straight lamp is without filling hydrargyrum.Therefore, various by seem the tradition illumination domestic dominated of option such as fluorescent bulbs and fluorescent tube or working space illuminator in, LED straight lamp is it is hardly surprising that be increasingly becoming the illumination option that people highly expect.The advantage of LED straight lamp comprises the ruggedness of lifting and life-span and relatively low power consuming.Thus it is contemplated that after all factors, LED straight lamp would is that the illumination option of escapable cost.
Known LED straight lamp generally comprises fluorescent tube, be located in fluorescent tube and with the circuit board of light source, and is located at the lamp holder of lamp tube ends, is provided with power supply, is electrically connected by circuit board between light source and power supply in lamp holder.But, existing LED straight lamp still has following a few class quality problems to need to solve, such as circuit board is generally rigid plate, after fluorescent tube ruptures, especially partial fracture when, whole LED straight lamp remains in the state of straight tube, and user can be mistakenly considered fluorescent tube and can also use, thus go to install voluntarily, it is easily caused generation and leaks electricity and electric shock accidents.
Furthermore, the circuit design of existing LED straight lamp, for meet relevant authentication specifications and and existing daylight lamp use electric ballast drive framework compatibility between, fail to provide suitable solution.For example, inside daylight lamp, there is no electronic building brick, comparatively simple for meeting in the specification of the UL certification of luminaire, EMI.But, LED straight lamp has considerable electronic building brick in lamp, it is important to consider that the impact that the layout between each electronic building brick is caused, and is difficult to meet the specification of UL certification, EMI.
Commercially available common electric ballast is mainly divided into instantaneous starting type (Instant Start) electric ballast, preheating start-up type (Program Start) electric ballast two kinds.Electric ballast has resonance circuit, it drives design to mate with the load characteristic of daylight lamp, i.e. electric ballast is capacitive component at daylight lamp before lighting, and for resistive device after lighting, corresponding startup program is provided, and makes what daylight lamp can be correct to light.And LED is non-linear component, entirely different with the characteristic of daylight lamp.Therefore, LED straight lamp can affect the resonance design of electric ballast, and causes compatibility issue.It is said that in general, preheating start-up type electric ballast can detect filament, and traditional LED drive circuit cannot be supported and causes to detect and unsuccessfully cannot start.It addition, be current source in electric ballast equivalence, during as the power supply of the DC-DC transducer of LED straight lamp, easily cause overcurrent-overvoltage or undercurrent is under-voltage, thus result in electronic building brick damage or LED straight lamp cannot stably provide illumination.
Come again, driving signal used by LED driving is direct current signal, but the signal that drives of daylight lamp is the high frequency of the low frequency of civil power, low-voltage ac signal or electric ballast, high-voltage AC signal, when being even applied to Emergency Light, the battery of Emergency Light is direct current signal.Voltage, frequency range drop between different driving signal are big, the most simply carry out rectification the most compatible.
And when LED straight lamp is Double-End Source, when if one of them of the both-end of LED straight lamp has inserted lamp socket, the other end not yet inserts lamp socket, if user touches and is not inserted into the metal of lamp socket end or conductive part, it is possible to the risk of electric shock occurs.
Light emitting diode (i.e. LED straight lamp) the fluorescent tube existing illuminator of replacement the most on the market i.e. replaces the mode of fluorescent tube mainly two kinds.
One is ballast compatible type light-emitting diode lamp tube (T-LED lamp), on the basis of the circuit not changing original illuminator, directly replaces traditional fluorescent tube with light-emitting diode lamp tube.
Another is ballast bypass type (Ballast by-pass) light-emitting diode lamp tube, circuit saves traditional ballast, and directly civil power is received light-emitting diode lamp tube.The latter is applicable to newly-decorated environment, uses new drive circuit and light-emitting diode lamp tube.
Because the problems referred to above, the present invention set forth below and embodiment.
Summary of the invention
The present invention provides a kind of new LED straight lamp, and its various aspects (with feature), to solve the problems referred to above.
A kind of LED straight lamp is provided, is adapted to be mounted in a lamp socket use, it is characterised in that comprise a fluorescent tube；Two lamp holders, are respectively provided with at least one pin, and are suitable to be respectively coupled to the two ends of this fluorescent tube, and the described pin system of described two lamp holders is in order to receive an external drive signal；One first rectification circuit, couples the described pin of described two one of them lamp holder of lamp holder, is in order to described external drive signal is carried out rectification, to produce a rectified signal；One second rectification circuit, couples the described pin of described two lamp holders wherein another lamp holder, is in order to described external drive signal is carried out rectification with described first rectification circuit simultaneously；One filter circuit, couples with described first rectification circuit and the second rectification circuit, is in order to be filtered described rectified signal, to produce a filtered signal；One LED drive module, couples with described filter circuit, and is configured to receive described filtered signal and produces a driving signal, and described LED drive module comprises a LED module, and described LED module is in order to receive described driving signal and luminous；And a detecting module, system is in order to decide whether that ending described external drive signal flows through described LED straight lamp, and described detecting module has one first sense terminal and one second sense terminal, described first sense terminal couples described first rectification circuit and/or the second rectification circuit, and described second sense terminal couples described filter circuit；Wherein, when the electric current flowing through described first sense terminal and described second sense terminal is greater than or equal to a current value, the conducting of described detecting module makes described LED straight lamp operate in a conducting state；When the electric current flowing through described first sense terminal and described second sense terminal is less than described current value, the cut-off of described detecting module makes described LED straight lamp enter a not on-state.
Preferably, described detecting module comprises an on-off circuit, a detection pulse generating module, a testing result latch cicuit and a detection decision circuit.Described detection decision circuit couples described testing result latch cicuit, the first sense terminal and the second sense terminal, and in order to detect the signal between described first sense terminal and the second sense terminal, so that a testing result signal is sent to described testing result latch cicuit.Described detection pulse generating module couples described testing result latch cicuit, and in order to notify the point on opportunity of described testing result latch circuit latches testing result.Described testing result latch cicuit couples described on-off circuit, and is suitable to according to described testing result signal latch one testing result, and described testing result is reflected into described on-off circuit.Described on-off circuit, according to described testing result, determines on or off between described first sense terminal and the second sense terminal.
In one embodiment, described detection pulse generating module comprises one first capacitor and one second capacitor, one first resistor and one second resistor, one first buffer, a reverser, a diode and one or door；One end of described first resistor is coupled to an input of described reverser, and the other end is suitable for couple in a driving voltage；One end of described second resistor is coupled to an input of described first buffer, and the other end is suitable for couple in a reference potential；The negative terminal of described diode is also coupled to the described input of described first buffer, and is connected with described second capacitor in parallel；One end of described first capacitor and one end of described second capacitor couple jointly, the described end that jointly couples is suitable for couple in a driving voltage, and another of described first capacitor terminates the described input of described reverser, the other end of described second capacitor then couples the described input of described first buffer；And a described outfan of reverser and an outfan of described first buffer are respectively coupled to described or two inputs of door, and described or door a outfan couples described testing result latch cicuit.
In one embodiment, described detection pulse generating module further includes one the 3rd capacitor, one the 3rd resistor and one second buffer；One junction point of wherein said 3rd capacitor and the 3rd resistor couples an input of described second buffer, and an outfan of described second buffer couples described first capacitor and the described of described second capacitor couples end jointly；Described 3rd capacitor and the 3rd resistor are in use series between a driving voltage and a reference potential, and described 3rd capacitor, the 3rd resistor and the second buffer are suitable to process described driving voltage to produce an input pulse signal in the described end that jointly couples, the pulse width of described input pulse signal is equal to a period of time, and has terminated in the described time cycle, exports a low level and jointly couples end in described.
In one embodiment, described detection decision circuit couples end and described on-off circuit couples described first sense terminal through a switch, and couples described testing result latch cicuit through a testing result end.In one embodiment, described detection decision circuit comprises a comparator and a resistor；The end of oppisite phase of described comparator is suitable to receive a reference level signal, and non-oppisite phase end is suitable for couple to described switch and couples end and connect described second sense terminal through described resistor, and an outfan of described comparator comprises described testing result end.Preferably, described signal between described first sense terminal and the second sense terminal causes the electric current flowing through described resistor to be enough to make when the level of described non-oppisite phase end is higher than the level of described reference level signal, and described comparator produces the described testing result signal of high level and exported by described testing result end；And the described signal between described first sense terminal and the second sense terminal causes the electric current flowing through described resistor not enough so that when the level of described non-oppisite phase end is higher than the level of described reference level signal, described comparator produces low level described testing result signal and also exported by described testing result end.
In one embodiment, described testing result latch cicuit couples described detection decision circuit through a testing result end, latches end through a testing result and couples described on-off circuit, and couples described detection pulse generating module through a pulse signal output end；Wherein said testing result latch cicuit comprises a D flip-flop, a resistor and one or door；One clock input of described D flip-flop couples described testing result end, one input (D) is suitable for couple to a driving voltage, one end of described resistor is coupled to an outfan (Q) of described D flip-flop, and the other end is suitable for couple to a reference potential；And described or door has two inputs and is respectively coupled to the described outfan (Q) of described pulse signal output end and described D flip-flop, and there is an outfan couple described testing result and latch end.
In one embodiment, described on-off circuit couples described first sense terminal, latches end through a testing result and couples described testing result latch cicuit, and couples end through a switch and couple described detection decision circuit.In one embodiment, described on-off circuit comprises a transistor, and described in described transistor couples, the first sense terminal, described testing result latch end and described switch couple end.
Preferably, when described detection pulse generating module produces a pulse signal, conducting is made described detection decision circuit carry out detecting determining that described testing result latch cicuit latches a testing result latch signal of end output as high level or low level in described testing result by described transistor.When described testing result latch signal is high level, conducting is made to turn between described first sense terminal and the second sense terminal by described transistor.And when described testing result latch signal is low level, cut-off is made to end between described first sense terminal and the second sense terminal by described transistor.
Preferably, described transistor comprises a bipolar junction transistors as a power transistor, and the collector of described bipolar junction transistors couples described first sense terminal, and base stage couples described testing result and latches end, and emitter-base bandgap grading couples described switch and couples end.
In certain embodiments, when when the lamp holder described lamp socket of insertion described in one end of described LED straight lamp, lamp holder described in the other end is suspension joint or human body in electrical contact, the described testing result signal of described detection decision circuit input low level is to described testing result latch cicuit, the most described detection pulse generating module exports a low level signal to described testing result latch cicuit, make a testing result latch signal of described testing result latch cicuit output low level so that described on-off circuit ends, the cut-off of wherein said on-off circuit makes to end between described first sense terminal and the second sense terminal, even if the most described LED straight lamp enters a not on-state.
In certain embodiments, when described two lamp holders of described LED straight lamp are correctly inserted into described lamp socket, the described testing result signal of described detection decision circuit input high level is to described testing result latch cicuit, make a testing result latch signal of described testing result latch cicuit output high level so that described on-off circuit turns on, the conducting of wherein said on-off circuit makes to turn on, even if the most described LED straight lamp operates in a conducting state between described first sense terminal and the second sense terminal.
Beneficial effect
The LED straight lamp of the present invention program, before being correctly installed in light fixture, lamp adapter assembly will not be energized, thus the user or installation personnel for LED straight lamp provides suitable electrical shock protection safety.
Accompanying drawing explanation
Fig. 1 is an axonometric chart, the LED straight lamp of display one embodiment of the invention；
Figure 1A is an axonometric chart, and the lamp holder of the lamp tube ends of the LED straight lamp of display another embodiment of the present invention has different size；
Fig. 2 is a three-dimensional exploded view, the LED straight lamp of display Fig. 1；
Fig. 3 is an axonometric chart, the front portion of the lamp holder of the LED straight lamp of display one embodiment of the invention and top；
Fig. 4 is an axonometric chart, the bottom of the lamp holder of the LED straight lamp of display Fig. 3；
Fig. 5 is an axonometric chart, the another holder structure in display further embodiment of this invention LED straight lamp；
Fig. 6 is a section plan, and the lamp plate of LED straight lamp of display one embodiment of the invention is bendable circuit soft board and its end gets over the transition part of fluorescent tube and is welded to connect with the outfan of power supply；
Fig. 7 is a section plan, the bendable circuit soft board tool double-decker of the lamp plate of display one embodiment of the invention LED straight lamp；
Fig. 8 is an axonometric chart, the pad being welded to connect with the printed circuit board (PCB) with power supply of the bendable circuit soft board of the lamp plate of display one embodiment of the invention LED straight lamp；
Fig. 9 is a plane graph, the pad configuration of the bendable circuit soft board of the lamp plate of display one embodiment of the invention LED straight lamp；
Figure 10 is a plane graph, the bendable circuit soft board of lamp plate of display another embodiment of the present invention LED straight lamp have 3 in string pad side by side；
Figure 11 is a plane graph, and the bendable circuit soft board of the lamp plate of display yet another embodiment of the invention LED straight lamp has 3 pads arranged side by side in two；
Figure 12 is a plane graph, the bendable circuit soft board of lamp plate of display further embodiment of this invention LED straight lamp have 4 in string the pad of pad side by side；
Figure 13 is a plane graph, and the bendable circuit soft board of the display present invention still lamp plate of an embodiment LED straight lamp has 4 pads arranged side by side in two；
Figure 14 is a plane graph, and the pad of the bendable circuit soft board of the lamp plate of display one embodiment of the invention LED straight lamp has hole；
Figure 15 is a section plan, and display utilizes the welding process of the pad of the bendable circuit soft board of the lamp plate of Figure 14 and the printed circuit board (PCB) of power supply；
Figure 16 is a section plan, and display utilizes the welding process of the pad of the bendable circuit soft board of the lamp plate of Figure 14 and the printed circuit board (PCB) of power supply, and wherein the hole on pad is near the edge of bendable circuit soft board；
Figure 17 is a plane graph, and the pad of the bendable circuit soft board of the lamp plate of display one embodiment of the invention LED straight lamp has breach；
Figure 18 is a section plan, display enlarged local section of A-A' line along Figure 17；
Figure 19 is an axonometric chart, and the bendable circuit soft board of lamp plate of display another embodiment of the present invention LED straight lamp is combined into a circuit board assemblies with the printed circuit board (PCB) of power supply；
Figure 20 is an axonometric chart, another configuration of the circuit board assemblies of display Figure 19；
Figure 21 is an axonometric chart, the power supply in display one embodiment of the invention LED straight lamp；
Figure 22 is an axonometric chart, and in display another embodiment of the present invention LED straight lamp, the circuit board of power supply is vertically soldered on the rigid circuit board of aluminum；
Figure 23 is an axonometric chart, in display another embodiment of the present invention, and the double-deck line layer of bendable circuit soft board tool of lamp plate；
Figure 24 A is the application circuit block schematic diagram of the power supply module of the LED straight lamp according to the present invention the first preferred embodiment；
Figure 24 B is the circuit box schematic diagram of the LED according to the present invention the first preferred embodiment；
Figure 25 A is the circuit diagram of the rectification circuit according to the present invention the first preferred embodiment；
Figure 25 B is the circuit diagram of the rectification circuit according to the present invention the second preferred embodiment；
Figure 25 C is the circuit diagram of the rectification circuit according to the present invention the 3rd preferred embodiment；
Figure 25 D is the circuit diagram of the rectification circuit according to the present invention the 4th preferred embodiment；
Figure 26 A is the circuit diagram of the end points change-over circuit according to the present invention the first preferred embodiment；
Figure 26 B is the circuit diagram of the end points change-over circuit according to the present invention the second preferred embodiment；
Figure 26 C is the circuit diagram of the end points change-over circuit according to the present invention the 3rd preferred embodiment；
Figure 26 D is the circuit diagram of the end points change-over circuit according to the present invention the 4th preferred embodiment；
Figure 27 A is the circuit box schematic diagram of the filter circuit according to the present invention the first preferred embodiment；
Figure 27 B is the circuit diagram of the filter unit according to the present invention the first preferred embodiment；
Figure 27 C is the circuit diagram of the filter unit according to the present invention the second preferred embodiment；
Figure 27 D is the circuit diagram of the filter unit according to the present invention the 3rd preferred embodiment；
Figure 27 E is the circuit diagram of the filter unit according to the present invention the 4th preferred embodiment；
Figure 28 A is the circuit diagram of the LED module according to the present invention the first preferred embodiment；
Figure 28 B is the circuit diagram of the LED module according to the present invention the second preferred embodiment；
Figure 28 C is the cabling schematic diagram of the LED module according to the present invention the first preferred embodiment；
Figure 28 D is the cabling schematic diagram of the LED module according to the present invention the second preferred embodiment；
Figure 28 E is the cabling schematic diagram of the LED module according to the present invention the 3rd preferred embodiment；
Figure 29 A is the circuit box schematic diagram of the LED according to the present invention the second preferred embodiment；
Figure 29 B is the circuit box schematic diagram of the drive circuit according to the present invention the first preferred embodiment；
Figure 29 C is the circuit diagram of the drive circuit according to the present invention the first preferred embodiment；
Figure 29 D is the circuit diagram of the drive circuit according to the present invention the second preferred embodiment；
Figure 29 E is the circuit diagram of the drive circuit according to the present invention the 3rd preferred embodiment；
Figure 29 F is the circuit diagram of the drive circuit according to the present invention the 4th preferred embodiment；
Figure 29 G is the circuit box schematic diagram of the drive circuit according to the present invention the second preferred embodiment；
Figure 29 H is district's line relation schematic diagram of the voltage Vin according to a preferred embodiment of the present invention and electric current Iout；
Figure 30 A is the application circuit block schematic diagram of the power supply module of the LED according to the present invention the 3rd preferred embodiment；
Figure 30 B is the circuit diagram of the anti-flicker circuit according to a preferred embodiment of the present invention；
Figure 31 A is the application circuit block schematic diagram of the power supply module of the LED according to the present invention the 4th preferred embodiment；
Figure 31 B is the circuit diagram of the protection circuit according to a preferred embodiment of the present invention；
Figure 32 A is the application circuit block schematic diagram of the power supply module of the LED according to the present invention the 5th preferred embodiment；
Figure 32 B is the circuit diagram of the mode switching circuit according to the present invention the first preferred embodiment；
Figure 32 C is the circuit diagram of the mode switching circuit according to the present invention the second preferred embodiment；
Figure 32 D is the circuit diagram of the mode switching circuit according to the present invention the 3rd preferred embodiment；
Figure 32 E is the circuit diagram of the mode switching circuit according to the present invention the 4th preferred embodiment；
Figure 32 F is the circuit diagram of the mode switching circuit according to the present invention the 5th preferred embodiment；
Figure 32 G is the circuit diagram of the mode switching circuit according to the present invention the 6th preferred embodiment；
Figure 32 H is the circuit diagram of the mode switching circuit according to the present invention the 7th preferred embodiment；
Figure 32 I is the circuit diagram of the mode switching circuit according to the present invention the 8th preferred embodiment；
Figure 33 A is the application circuit block schematic diagram of the power supply module of the LED according to the present invention the 6th preferred embodiment；
Figure 33 B is the application circuit block schematic diagram of the power supply module of the LED according to the present invention the 7th preferred embodiment；
Figure 33 C is the circuit configuration schematic diagram of the ballast compatible circuit according to present pre-ferred embodiments；
Figure 33 D is the application circuit block schematic diagram of the power supply module of the LED according to the present invention the 8th preferred embodiment；
Figure 33 E is the application circuit block schematic diagram of the power supply module of the LED according to the present invention the 9th preferred embodiment；
Figure 33 F is the circuit diagram of the ballast compatible circuit according to the present invention the first preferred embodiment；
Figure 33 G is the application circuit block schematic diagram of the power supply module of the LED straight lamp according to the present invention the tenth preferred embodiment；
Figure 33 H is the circuit diagram of the ballast compatible circuit according to the present invention the second preferred embodiment；
Figure 33 I is the circuit diagram of the ballast compatible circuit according to the present invention the 3rd preferred embodiment；
Figure 34 A is the application circuit block schematic diagram of the power supply module of the LED straight lamp according to the present invention the 11st preferred embodiment；
Figure 34 B is the application circuit block schematic diagram of the power supply module of the LED straight lamp according to the present invention the 12nd preferred embodiment；
Figure 34 C is the application circuit block schematic diagram of the power supply module of the LED straight lamp according to the present invention the 13rd preferred embodiment；
Figure 34 D is the circuit diagram of the ballast compatible circuit according to the present invention the 3rd preferred embodiment；
Figure 35 A is the application circuit block schematic diagram of the power supply module of the LED straight lamp according to the present invention the 14th preferred embodiment；
Figure 35 B is the circuit diagram of the filament artificial circuit according to the present invention the first preferred embodiment；
Figure 35 C is the circuit diagram of the filament artificial circuit according to the present invention the second preferred embodiment；
Figure 35 D is the circuit diagram of the filament artificial circuit according to the present invention the 3rd preferred embodiment；
Figure 35 E is the circuit diagram of the filament artificial circuit according to the present invention the 4th preferred embodiment；
Figure 35 F is the circuit diagram of the filament artificial circuit according to the present invention the 5th preferred embodiment；
Figure 36 A is the application circuit block schematic diagram of the power supply module of the LED straight lamp according to the present invention the 15th preferred embodiment；
Figure 36 B is the circuit diagram of the overvoltage crowbar according to present pre-ferred embodiments；
Figure 37 A is the application circuit block schematic diagram of the power supply module of the LED straight lamp according to the present invention the 16th preferred embodiment；
Figure 37 B is the application circuit block schematic diagram of the power supply module of the LED straight lamp according to the present invention the 17th preferred embodiment；
Figure 37 C is the circuit box schematic diagram of the ballast circuit for detecting according to present pre-ferred embodiments；
Figure 37 D is the circuit diagram of the ballast circuit for detecting according to the present invention the first preferred embodiment；
Figure 37 E is the circuit diagram of the ballast circuit for detecting according to the present invention the second preferred embodiment；
Figure 38 A is the application circuit block schematic diagram of the power supply module of the LED straight lamp according to the present invention the 18th preferred embodiment；
Figure 38 B is the application circuit block schematic diagram of the power supply module of the LED straight lamp according to the present invention the 19th preferred embodiment；
Figure 38 C is the circuit diagram of the auxiliary power module according to present pre-ferred embodiments；
Figure 39 A is the application circuit block schematic diagram of the power supply module of the LED straight lamp according to the present invention the 20th preferred embodiment；
Figure 39 B is the circuit diagram of the detecting module according to present pre-ferred embodiments；
Figure 39 C is the circuit diagram of the detection pulse generating module according to present pre-ferred embodiments；
Figure 39 D is the circuit diagram of the detection decision circuit according to present pre-ferred embodiments；
Figure 39 E is the circuit diagram of the testing result latch cicuit according to present pre-ferred embodiments；
Figure 39 F is the circuit diagram of the on-off circuit according to present pre-ferred embodiments；
Figure 40 A-F shows the Several structural schematic diagram of embodiment of the present invention lamp holder；
Figure 41 is the structural representation of embodiment of the present invention LED daylight lamp；
Figure 42 is the variant embodiment of microswitch in Figure 41.
Detailed description of the invention
The present invention is on the basis of glass lamp, it is proposed that a kind of new LED straight lamp, to solve problem and the problems referred to above of mentioning in background technology.Understandable for enabling the above-mentioned purpose of the present invention, feature and advantage to become apparent from, below in conjunction with the accompanying drawings the specific embodiment of the present invention is described in detail.The narration of following various embodiments of the present invention, merely to illustrate and be illustration, is not meant as whole embodiments of the present invention or limits the invention to specific embodiment.
Refer to Fig. 1 and Fig. 2, the present invention provides a kind of LED straight lamp in an embodiment, comprising: the lamp plate 2 that a fluorescent tube 1, is located in fluorescent tube 1, and it is respectively arranged on two lamp holders 3 at fluorescent tube 1 two ends.Fluorescent tube 1 can use plastics fluorescent tube or glass lamp, the size of described lamp holder to be identical or different.Refer to Figure 1A, in the embodiment that the size of described lamp holder differs, it is preferable that size is relatively headlight area of bed the 30% to 80% of described less lamp holder.
In one embodiment, the fluorescent tube 1 of LED straight lamp uses the glass lamp of tool reinforced structure, to avoid traditional glass lamp easily rupturable and to rupture causing the problem of electric shock accidents because of electric leakage, and the problem that plastic lantern is the most aging.In various embodiments of the present invention, it is possible to use glass fluorescent tube 1 is done secondary operations strengthening by chemical mode or physics mode.
Refer to Fig. 3 and Fig. 4, in one embodiment of the invention, the lamp holder 3 of LED straight lamp includes an insulation tube 302, and one is fixedly arranged on the heat-conducting part 303 on insulation tube 302 outer peripheral face, and two conductive pins 301 being located on insulation tube 302.Described heat-conducting part 303 can be the becket of a tubulose.
When making LED straight lamp, after the end region 101 of fluorescent tube 1 is inserted in lamp holder 3, the end region 101 of fluorescent tube 1 insert the axial length of lamp holder 3 part account for heat-conducting part 303 axial length 2/1 to three/3rds between, such benefit is: on the one hand, ensure that conductive pin 301 and heat-conducting part 303 have enough creep age distances, be difficult to short circuit both during energising and make people get an electric shock and initiation potential；On the other hand, due to the insulating effect of insulation tube 302 so that the creep age distance between conductive pin 301 and heat-conducting part 303 strengthens, it is easier to make people get an electric shock and the test of initiation potential during by high voltage.
Refer to Fig. 5 and Figure 22, in another embodiment, the end of lamp holder 3 ' is provided with a projection 312, and the top of projection 312 offers hole, and its outer rim is provided with the groove 314 that a degree of depth is 0.1 ± 1%mm and is available for conductive pin 53 and positions.Conductive pin 53 is after passing the hole of lamp holder 3 ' end projection 312, bent it is placed on groove 314, projection 312 is covered the most again with a conducting metal cap 311, so, then conductive pin 53 can be fixed between projection 312 and conducting metal cap 311, in the present embodiment, the internal diameter of conducting metal cap 311 for example, 7.56 ± 5%mm, and the external diameter of projection 312 for example, 7.23 ± 5%mm, and conductive pin 53 external diameter for example, 0.5 ± 1%mm, therefore conducting metal cap 311 can directly close over firmly projection 312 without the most additionally coating viscose, so just can complete the electrical connection of power supply 5 and conducting metal cap 311.
Refer to Fig. 2,3,12,13, in other embodiments, lamp holder provided by the present invention is provided with the hole 304 for heat radiation.Thereby, make way for the heat that power supply module within lamp holder produces to disperse and be in the condition of high temperature inside lamp holder without causing, to avoid the reliability of lamp holder intraware to decline.Further, hole lamp holder being used for heat radiation is arc.Further, hole lamp holder being used for heat radiation is three camber lines not of uniform size.Further, hole lamp holder being used for heat radiation is ascending three camber lines gradually changed.Further, on lamp holder, the hole for heat radiation can be above-mentioned arc, and the arbitrarily collocation of camber line is constituted.
In other embodiments, lamp holder includes one for installing the power supply slot (not shown) of power supply module.
In other embodiments; the width of bendable circuit soft board can be widened, and owing to circuit board surface includes the circuit protecting layer of ink material, and ink material has the effect of reflection light; therefore at the position widened, circuit board itself just can play such as the effect of reflectance coating 12 function.Preferably, bendable circuit soft board is 0.3 to 0.5 along the proportion between circumferentially extending length and the girth of described fluorescent tube 2 inner peripheral surface of fluorescent tube 2.A circuit protecting layer can be coated with outside bendable circuit soft board; circuit protecting layer can be a kind of ink material; having the function increasing reflection, the bendable circuit soft board widened is with light source for starting point to circumferentially extending, and the light of light source can make light more concentrate by the position widened.
Further, any one during lamp plate 2 can be strip aluminium base, FR4 plate or bendable circuit soft board.Owing to the fluorescent tube 1 of the present embodiment is glass lamp, if lamp plate 2 uses strip aluminium base or the FR4 plate of rigidity, so rupture when fluorescent tube, such as after breaking in two, whole fluorescent tube is still able to remain the state of straight tube, at this moment user likely will be considered that LED straight lamp can also use and go to install voluntarily, is easily caused electric shock accidents.Owing to bendable circuit soft board has stronger pliability and flexible characteristic, solve the situation that rigid strip aluminium base, FR4 plate pliability and bendability are not enough, therefore the lamp plate 2 of the present embodiment uses bendable circuit soft board, so after fluorescent tube 1 ruptures, i.e. cannot support the fluorescent tube 1 ruptured to continue to remain straight tube state, to inform that user LED straight lamp can not use, it is to avoid the generation of electric shock accidents.Therefore, after using bendable circuit soft board, electric shock problem that is broken due to glass tubing and that cause can be alleviated to a certain extent.Following example i.e. explain using bendable circuit soft board as lamp plate 2.
Refer to Fig. 7, the bendable circuit soft board as lamp plate 2 includes one layer of line layer 2a with conductive effect, and light source 202 is located on line layer 2a, is connected with power sourced electric by line layer 2a.The described line layer having conductive effect in this description can be described as again conductive layer.With reference to Fig. 7, in the present embodiment, bendable circuit soft board can also include one dielectric layer 2b, overlapped with line layer 2a, and the area equation of dielectric layer 2b and line layer 2a, line layer 2a is used for arranging light source 202 on the surface opposing with dielectric layer 2b.Line layer 2a is electrically connected to power supply 5 in order to allow DC current pass through.Dielectric layer 2b is then adhered on the inner peripheral surface of fluorescent tube 1 by bonding agent sheet 4 on the surface opposing with line layer 2a.Wherein, line layer 2a can be metal level, or is furnished with the bus plane of wire (such as copper cash).
In other embodiments, the outer surface of line layer 2a and dielectric layer 2b can be coated with a circuit protecting layer, and described circuit protecting layer can be a kind of ink material, has welding resistance and increases the function of reflection.Or, bendable circuit soft board can be a Rotating fields, is i.e. only made up of a sandwich circuit layer 2a, then in the circuit protecting layer of one layer of above-mentioned ink material of Surface coating of line layer 2a.Whether a sandwich circuit layer 2a structure or two-layer structure (a sandwich circuit layer 2a and one dielectric layer 2b) can coupled circuit protective layers.Circuit protecting layer the most only can also arrange circuit protecting layer in the side with light source 202 in the side surface configuration of bendable circuit soft board.It should be noted that, bendable circuit soft board is a sandwich circuit Rotating fields 2a or is two-layer structure (a sandwich circuit layer 2a and one dielectric layer 2b), substantially ratio general three layers of flexible base board (pressing from both sides one dielectric layer in two sandwich circuit layers) more pliability and flexibility, therefore, can arrange in pairs or groups (such as: non-straight lamp) with having special formed fluorescent tube 1, and bendable circuit soft board is close on fluorescent tube 1 tube wall.Additionally, bendable circuit soft board is close to tube wall for preferably to configure, and the number of plies of bendable circuit soft board is the fewest, then radiating effect is the best, and material cost is the lowest, more environmentally friendly, and pliable and tough effect also has an opportunity to promote.
Certainly, the bendable circuit soft board of the present invention is not limited in one layer or double layer circuit plate, in other embodiments, bendable circuit soft board includes multilayer line layer 2a and multilayer dielectric layer 2b, dielectric layer 2b and line layer 2a can sequentially interlock overlapped and be located at the line layer 2a side opposing with light source 202, light source 202 is located at the last layer of multilayer line layer 2a, is connected with power sourced electric by the last layer of line layer 2a.In other embodiments, the length as the bendable circuit soft board of lamp plate 2 is more than the length of fluorescent tube.
Refer to Figure 23, in one embodiment, bendable circuit soft board as lamp plate 2 the most sequentially includes a first line layer 2a, one dielectric layer 2b and one second line layer 2c, the thickness of the second line layer 2c thickness more than first line layer 2a, the length of lamp plate 2 is more than the length of fluorescent tube 1, wherein in the stub area that lamp plate 2 is not provided with light source 202 and protrudes from fluorescent tube 1, first line layer 2a and the second line layer 2c is respectively through two through hole 203 and 204 electrical communication, but through hole 203 and 204 does not the most connect to avoid short circuit.
Thereby mode, owing to the second line layer 2c thickness is relatively big, can play support first line layer 2a and the effect of dielectric layer 2b, allows lamp plate 2 be not likely to produce skew or deformation when being attached on the inner tubal wall of fluorescent tube 1, to promote fine ratio of product simultaneously.Additionally, first line layer 2a and the second line layer 2c is electrically connected logical so that the circuit layout on first line layer 2a can extend to the second line layer 2c, make the circuit layout on lamp plate 2 the most polynary.Furthermore, circuit location wiring originally becomes double-deck from monolayer, and the line layer monolayer area on lamp plate 2, that is the size on width can reduce further, and the lamp plate quantity allowing batch carry out die bond can increase, and promote productivity ratio.
Further, light source 202 and the first line layer 2a protruding from the stub area of fluorescent tube 1 and the second line layer 2c it is not provided with on lamp plate 2, also can directly be utilized to realize the circuit layout of power supply module, and allow power supply module directly be arranged on bendable circuit soft board and be achieved.
Continuing referring to Fig. 2, lamp plate 2 is provided with some light sources 202, is provided with power supply 5 in lamp holder 3, by lamp plate 2 electrical communication between light source 202 and power supply 5.In various embodiments of the present invention, power supply 5 can be single body (the most all power supply modules are all integrated in parts), and is located in the lamp holder 3 of fluorescent tube 1 one end；Or power supply 5 can also be divided into two parts, it is referred to as double individual (the most all power supply modules are separately positioned in two parts), and two parts is respectively arranged in the lamp holder 3 of lamp tube ends.If strengthening section process is made in fluorescent tube 1 only one end, power supply prioritizing selection is single body, and is located in the lamp holder 3 corresponding to the end region after strengthening 101.
No matter it is single body or double individuality, the generation type of power supply can have Mutiple Choice, such as, power supply can be the module after a kind of embedding molding, specifically, uses the silica gel (heat conductivity >=0.7w/m k) of a kind of high heat conduction, by mould, power supply module is carried out embedding molding, obtain power supply, the advantage that the power supply that this mode obtains has high insulation, height dispels the heat, profile is more regular, and can coordinate with other structural members easily.Or, exposed power supply module directly can also be inserted inside lamp holder by power supply for not make casting glue molding, or after the exposed power supply module conventional thermal draw is encased, then it is internal to insert lamp holder 3.In other words, in various embodiments of the present invention, power supply 5 can be the form appearance carrying power supply module as shown in Figure 7 with monolithic printed circuit board (PCB), also can be to occur with the form of single module as shown in figure 21.
Refer to Fig. 2 and combine Figure 21, in an embodiment, one end of power supply 5 has male plug 51, and the other end has metal ferrule 52, and the end of lamp plate 2 is provided with female plug 201, and lamp holder 3 is provided with the conductive pin 301 for connecting external power source.The male plug 51 of power supply 5 is inserted in the female plug 201 of lamp plate 2, and metal ferrule 52 is inserted in the conductive pin 301 of lamp holder 3.Now male plug 51 and female plug 201 are equivalent to adaptor, for power supply 5 and lamp plate 2 being electrically connected.After metal ferrule 52 inserts in conductive pin 301, through outside stamping tool impact conductive pin 301 so that conductive pin 301 occurs slight deformation, thus fixes the metal ferrule 52 on power supply 5, and realizes electrical connection.During energising, electric current passes sequentially through conductive pin 301, metal ferrule 52, male plug 51 and female plug 201 and arrives lamp plate 2, and arrives light source 202 by lamp plate 2.But, the structure of power supply 5 is then not limited to modular pattern shown in Figure 21.Power supply 5 can be a printed circuit board (PCB) being loaded with power supply module, then is electrically connected with lamp plate 2 by the connected mode of male plug 51, female plug 201.
In other embodiments, electric connection between power supply 5 and the lamp plate 2 of any pattern can also replace above-mentioned male plug 51 and female plug 201 by conventional wires routing mode, i.e. using a traditional plain conductor, electrically connected with power supply one end of plain conductor, the other end electrically connects with lamp plate 2.Further, plain conductor can be coated with an insulated sleeve to protect user to avoid getting an electric shock.But the mode that wire routing connects likely has the problem of fracture in transportation, slightly worse in quality.
In other embodiments, the electric connection between power supply 5 with lamp plate 2 can by rivet nail joint, tin cream gluing, weld or with wire binding by the way of be directly linked together.Consistent with the fixed form of aforementioned lamp plate 2, a side surface of bendable circuit soft board is bonded and fixed to the inner peripheral surface of fluorescent tube 1 by bonding agent sheet 4, and the two ends of bendable circuit soft board can select fixing or not be fixed on the inner peripheral surface of fluorescent tube 1.
If the two ends of bendable circuit soft board are fixed on the inner peripheral surface of fluorescent tube 1, then pay the utmost attention to arrange female plug 201 on bendable circuit soft board, then the male plug 51 of power supply 5 is inserted female plug 201 and realizes electrical connection.
If lamp plate 2 is not fixed on the inner peripheral surface of fluorescent tube 1 along the two ends that fluorescent tube 1 is axial, if using wire to connect, during follow-up moving, due to two ends freely, it is susceptible to rock during follow-up moving, thus makes it possible to wire and rupture.Therefore lamp plate 2 with the connected mode prioritizing selection of power supply 5 for welding.Specifically, with reference to Fig. 6, it is welded on the outfan of power supply 5 after can directly lamp plate 2 be got over the transition region 103 of strengthening section structure, removes the use of wire from, improve the stability of product quality.Now lamp plate 2 need not arrange female plug 201, and the outfan of power supply 5 is also without arranging male plug 51.
As shown in Figure 8, the concrete practice can be that the outfan of power supply 5 is reserved power pad a, and on power pad a, stay stannum so that the thickness of stannum on pad increases, convenient welding, accordingly, the end of lamp plate 2 also reserves light source pad b, and the light source pad b of the power pad a of power supply 5 outfan with lamp plate 2 is welded together.It is front by the plane definition at pad place, then lamp plate 2 docks the most firm with the connected mode of power supply 5 with the pad in both fronts, but it is pressed in the back side of lamp plate 2 when welding for welding pressure head typical case, scolding tin is heated across lamp plate 2, the problem being easier reliability occurs.If as shown in figure 14, will output hole in the middle of the light source pad b in lamp plate 2 front, then the superposition that faced up welds on the power pad a in power supply 5 front, then scolding tin heating can directly be melted by welding pressure head, to being relatively easy on Practical Operation realize.
As shown in Figure 8, in above-described embodiment, bendable circuit soft board major part as lamp plate 2 is fixed on the inner peripheral surface of fluorescent tube 1, it is not only to be fixed on the inner peripheral surface of fluorescent tube 1 at two ends, the lamp plate 2 not being fixed on fluorescent tube 1 inner peripheral surface forms a freedom portion 21, and lamp plate 2 is fixed on the inner peripheral surface of fluorescent tube 1.Freedom portion 21 has above-mentioned pad b.When assembling, one end of freedom portion 21 and power supply 5 welding can drive freedom portion 21 to fluorescent tube 1 internal contraction.It should be noted that, when the bendable circuit soft board as lamp plate 2 has the structure that two sandwich circuit layer 2a and 2c press from both sides a dielectric layer 2b as shown in figure 23, aforementioned lamp plate 2 is not provided with light source 202 and protrudes from the stub area of fluorescent tube 1 and as freedom portion 21, and freedom portion 21 can be allowed to realize connection and the circuit layout of power supply module of two sandwich circuit layers.
In the present embodiment, when lamp plate 2 and power supply 5 connect, the surface, light source 202 place on pad b and a and lamp plate in the same direction, and is formed with through hole e as shown in figure 14 on the pad b on lamp plate 2 so that pad b and pad a is interconnected.When the freedom portion 21 of lamp plate 2 deforms towards the internal contraction of fluorescent tube 1, the welded connection between printed circuit board (PCB) and the lamp plate 2 of power supply 5 has a lateral pulling force to power supply 5.Further, compared to the aspectant situation of pad b system on the pad a of power supply 5 and lamp plate 2, the welded connection between printed circuit board (PCB) and the lamp plate 2 of power supply 5 here also has a downward pulling force to power supply 5.This downward pulling force comes from the solder in through hole e and forms one between power supply 5 and lamp plate 2 and more strengthen and be firmly electrically connected with.
As it is shown in figure 9, the light source pad b of lamp plate 2 is two unconnected pads, electrically connecting with light source 202 both positive and negative polarity respectively, the size of pad is about 3.5 × 2mm2, the printed circuit board (PCB) of power supply 5 also has pad corresponding thereto, being arranged above of pad is easy to weld board automatic welding and have reserved stannum, and the thickness of stannum can be 0.1 to 0.7mm, and preferred values is that 0.3 to 0.5mm is more appropriate, is optimal with 0.4mm.One insulation hole c can be set between two pads, two pads are avoided to cause electrical short during welding because scolding tin is welded together, the rear of this external insulated hole hole c also can arrange location hole d, is used for the tram allowing automatic welding board can correctly judge light source pad b.
The light source pad b of lamp plate at least one, electrically connects with light source 202 both positive and negative polarity respectively.In other embodiments, in order to be able to reach the extendibility in compatible and follow-up use, the quantity of light source pad b can have more than one, such as 2,3,4 or more than 4.When pad only has 1, corresponding two ends of lamp plate all can electrically connect with power supply respectively, to form primary Ioops, now may utilize the substituted mode of electronic building brick, such as: replaces electric capacity as current stabilization assembly with inductance.In this description, the meaning of " inductance " contains " inducer ", and the meaning of " electric capacity " contains " capacitor ", and the meaning of " resistance " contains " resistor ".If Figure 10 is to shown in 28, when pad is 3, the 3rd pad can serve as ground connection and use, and when pad is 4, the 4th pad can be used to make signal input part.Accordingly, power pad a is also identical with light source pad b quantity.When pad is more than 3, the arrangement between pad can be that string side by side or lines up two row, configuring in position according to accommodating size time actually used, causing short circuit as long as the most not electrically connecting.In other embodiments, if by part circuit production on bendable circuit soft board, light source pad b can be independent one, and number of pads is the fewest, more saves flow process in technique；The more, the electrical connection of bendable circuit soft board and power output end is fixing more to be strengthened number of pads.
As shown in figure 14, in other embodiments, the inside of light source pad b can have the structure of welding perforation e, and the diameter of welding perforation e can be 1 to 2mm, preferably 1.2 to 1.8mm, most preferably 1.5mm, and the least, the stannum welded is difficult to pass through.When the power pad a of the power supply 5 and light source pad b of lamp plate 2 welds together, the stannum of welding can be through described welding perforation e, then it is deposited in cooling above welding perforation e to condense, form the ball structure g having more than welding perforation e diameter, it seems the function of nail that this ball structure g can play, in addition to fixing through the stannum between power pad a and light source pad b, more can strengthen the firm fixed of electric connection because of the effect of ball structure g.
As shown in Figure 15 to Figure 16, in other embodiments, as the edge 1mm of the welding perforation e distance lamp plate 2 of light source pad b, the stannum of welding can be deposited in hole top edges through described hole e, too much stannum also can reflux from the edge of lamp plate 2 toward lower section, then being coagulated together with the stannum on power pad a, its structure similarly is that lamp plate 2 is followed closely on the circuit board of power supply 5 by a rivet firmly, has reliable electricity connection function.As shown in FIG. 17 and 18, in other embodiments, welding breach f instead of welding perforation e, the welding perforation of pad is at edge, the stannum of welding electrically connects power pad a and light source pad b fixing through described welding breach f, stannum is easier to climb up light source pad b and is deposited in around welding breach f, has more stannum and form the soldered ball having more than welding breach f diameter after cooling condenses, and this ball structure can allow the crystallized ability of electric connection structure strengthen.In the present embodiment, because the design of welding breach, it seems the function of C-shaped nail that the stannum of welding plays.
The welding perforation of pad is whether initially formed, or during welding, directly welding pressure head or title thermal head are punched, and can reach the structure described in the present embodiment.Described welding its surface contacted with scolding tin of pressure head can be plane, concave surface, convex surface or these combinations；And described welding pressure head can be strip or latticed for limiting the surface of be intended to welding object such as lamp plate 2, perforation is not exclusively covered by the described surface contacted with scolding tin, guarantee that scolding tin can pass from perforation, when scolding tin pass welding perforation be deposited in welding perforation around time, recess is provided that the accommodating position of soldered ball.In other embodiments, the bendable circuit soft board as lamp plate 2 has a hole, location, can be positioned accurately by the pad of power pad a and light source pad b through hole, location when welding.
Refer to Figure 19 and Figure 20, in other embodiments, the above-mentioned lamp plate 2 fixing through welding manner and power supply 5 can be with circuit board group component 25 replacements being equipped with power supply module 250.Circuit board group component 25 has long circuit board 251 and a short circuit board 253, and long circuit board 251 and short circuit board 253 are fitted each other and fixed through gluing mode, and short circuit board 253 is positioned at long circuit board 251 adjacent peripheral edges.On short circuit board 253, there is power supply module 25, be monolithically fabricated power supply.The short circuit board 253 longer circuit board of material 251 is hard, to reach the effect of Power Support module 250.
Long circuit board 251 can be the above-mentioned bendable circuit soft board as lamp plate 2 or flexible base board, and has the line layer 2a shown in Fig. 7.The mode of the line layer 2a of lamp plate 2 and power supply module 250 electrical connection can have different electric connection mode according to actually used situation.As shown in figure 19, the line layer 2a being electrically connected with power supply module 250 being all positioned at by power supply module 250 and long circuit board 251 the same side of short circuit board 253, power supply module 250 is directly electrically connected with long circuit board 251.As shown in figure 20, the line layer 2a system being electrically connected with power supply module 250 being laid respectively at by power supply module 250 and long circuit board 251 both sides of short circuit board 253, power supply module 250 penetrates the line layer 2a electrical connection of too short circuit board 253 and lamp plate 2.
Refer to Figure 24 A, for the application circuit block schematic diagram of the power supply module of the LED straight lamp according to the present invention the first preferred embodiment.Alternating current power supply 508 is to provide ac supply signal.Lamp tube drive circuit 505 receives the ac supply signal of alternating current power supply 508, and is converted into alternating current drive signal.LED straight lamp 500 receives the alternating current drive signal of lamp tube drive circuit 505, and is driven to emit light.In the present embodiment, LED straight lamp 500 is both-end (each pair of pin) power supply, and one end lamp holder of fluorescent tube has first pin the 501, second pin 502, and other end lamp holder has the 3rd pin the 503, the 4th pin 504.First pin the 501, second pin the 502, the 3rd pin 503 and the 4th pin 504 are coupled to lamp tube drive circuit 505 jointly to receive alternating current drive signal, to drive the LED component (not drawing) in LED straight lamp 500 luminous.But, in other embodiments, every one end lamp holder of fluorescent tube can have at least one pin, in order to receive alternating current drive signal.Also it is the purpose reaching LED straight lamp 500 both-end energising, not necessarily all uses two pins at every one end lamp holder.In the present embodiment, alternating current power supply 508 can be civil power, voltage range 100-277V, and frequency is 50 or 60Hz.Lamp tube drive circuit 505 receives the ac supply signal of alternating current power supply 508, and is converted into alternating current drive signal with as external drive signal.Lamp tube drive circuit 505 can be electric ballast, in order to by converted for the signal of civil power high frequency, the alternating current drive signal of high pressure.The kind of common electronics ballast, such as: instantaneous starting type (Instant Start) electric ballast, preheating start-up type (Program Start) electric ballast, quick-starting direct (Rapid Start) electric ballast etc., the LED straight lamp of the present invention is the most applicable.The voltage of alternating current drive signal is more than 300V, and preferable voltage range is 400-700V；Frequency is more than 10kHz, and preferable frequency range is 20k-50kHz.Refer to Figure 24 B, for the circuit box schematic diagram of the LED according to the present invention the first preferred embodiment.The power supply module of LED mainly comprises the first rectification circuit 510, filter circuit 520, LED drive module 530 and the second rectification circuit 540, can apply the Double-End Source framework to Figure 24 A.First rectification circuit 510 couples first pin the 501, second pin 502, in order to the external drive signal received and rectification the first pin the 501, second pin 502 is transmitted；Second rectification circuit 540 couples the 3rd pin the 503, the 4th pin 504, in order to the external drive signal received and rectification the 3rd pin the 503, the 4th pin 504 is transmitted.It is to say, the power supply module of LED can comprise the first rectification circuit 510 and the second rectification circuit 540 exports rectified signal in first rectification output end the 511, second rectification output end 512 jointly.Filter circuit 520 couples first rectification output end the 511, second rectification output end 512 to receive rectified signal, and is filtered rectified signal, is then exported filtered signal by outfan 522 after outfan 521, second filters after the first filtering.LED drive module 530 couples outfan 522 after outfan 521, second filters after the first filtering and, with signal after accepting filter, then drives the LED component (not drawing) in LED drive module 530 luminous.
Refer to Figure 25 A, for the circuit diagram of the rectification circuit according to the present invention the first preferred embodiment.Rectification circuit 610 is bridge rectifier, comprises the first commutation diode the 611, second commutation diode the 612, the 3rd commutation diode 613 and the 4th commutation diode 614, in order to received signal is carried out all wave rectification.The positive pole of the first commutation diode 611 couples the second rectification output end 512, and negative pole couples the second pin 502.The positive pole of the second commutation diode 612 couples the second rectification output end 512, and negative pole couples pin 501.The positive pole of the 3rd commutation diode 613 couples the second pin 502, and negative pole couples the first rectification output end 511.The positive pole of commutation diode 614 couples pin 501, and negative pole couples the first rectification output end 511.
When the signal that first pin the 501, second pin 502 receives is AC signal, the operation of rectification circuit 610 is described as follows.When AC signal is in positive half-wave, AC signal sequentially flows into after the first pin 501, commutation diode 614 and the first rectification output end 511, and sequentially flows out after second rectification output end the 512, first commutation diode 611 and the second pin 502.When AC signal is in negative half-wave, AC signal sequentially flows into after the second pin the 502, the 3rd commutation diode 613 and the first rectification output end 511, and sequentially flows out after second rectification output end the 512, second commutation diode 612 and pin 501.Therefore, no matter AC signal is in positive half-wave or negative half-wave, the positive pole of the rectified signal of rectification circuit 610 is respectively positioned on the first rectification output end 511, and negative pole is respectively positioned on the second rectification output end 512.Illustrating according to aforesaid operations, the rectified signal of rectification circuit 610 output is full wave rectified signal.
When first pin the 501, second pin 502 couples DC source and receives direct current signal, the operation of rectification circuit 610 is described as follows.When the first pin 501 couples the anode of DC source and the second pin 502 couples the negative terminal of DC source, direct current signal sequentially flows into after the first pin 501, commutation diode 614 and the first rectification output end 511, and sequentially flows out after second rectification output end the 512, first commutation diode 611 and the second pin 502.When the first pin 501 couples the negative terminal of DC source and the second pin 502 couples the anode of DC source, AC signal sequentially flows into after the second pin the 502, the 3rd commutation diode 613 and the first rectification output end 511, and sequentially flows out after second rectification output end the 512, second commutation diode 612 and the first pin 501.Similarly, no matter how direct current signal inputs through first pin the 501, second pin 502, the positive pole of the rectified signal of rectification circuit 610 is respectively positioned on the first rectification output end 511, and negative pole is respectively positioned on the second rectification output end 512.
Therefore, no matter rectification circuit 610 received signal at the present embodiment is AC signal or direct current signal, rectified signal all can correctly be exported.
Refer to Figure 25 B, for the circuit diagram of the rectification circuit according to the present invention the second preferred embodiment.Rectification circuit 710 comprises the first commutation diode 711 and the second commutation diode 712, in order to received signal is carried out halfwave rectifier.The anode of the first commutation diode 711 couples the second pin 502, and negative terminal couples the first rectification output end 511.The anode of the second commutation diode 712 couples the first rectification output end 511, and negative terminal couples the first pin 501.Second rectification output end 512 can omit or ground connection depending on actual application.
Then the operation of explanation rectification circuit 710 is as follows.
When AC signal is in positive half-wave, AC signal is higher than the signal level in the second pin 502 input in the signal level that the first pin 501 inputs.Now, the first commutation diode 711 and the second commutation diode 712 are in inverse inclined cut-off state, and rectification circuit 710 stops output rectified signal.When AC signal is in negative half-wave, AC signal is less than the signal level in the second pin 502 input in the signal level that the first pin 501 inputs.Now, first commutation diode 711 and the second commutation diode 712 are in along inclined conducting state, AC signal flows into via first commutation diode the 711, first rectification output end 511, and is flowed out by the second rectification output end 512 or another circuit of LED or earth terminal.Illustrating according to aforesaid operations, the rectified signal of rectification circuit 710 output is half wave rectified signal.
Refer to Figure 25 C, for the circuit diagram of the rectification circuit according to the present invention the 3rd preferred embodiment.Rectification circuit 810 comprises rectification unit 815 and end points change-over circuit 541, to carry out halfwave rectifier.In the present embodiment, rectification unit 815 is half-wave rectifying circuit, comprises the first commutation diode 811 and the second commutation diode 812, in order to carry out halfwave rectifier.The anode of the first commutation diode 811 couples the second rectification output end 512, and negative terminal couples half-wave junction point 819.The anode of the second commutation diode 812 couples half-wave junction point 819, and negative terminal couples the first rectification output end 511.End points change-over circuit 541 couples half-wave junction point 819, and the first pin 501 and the second pin 502, in order to the first pin 501 and the second pin 502 received signal are transferred to half-wave junction point 819.By the end points translation function of end points change-over circuit 541, rectification circuit 810 can provide two inputs (coupling the first pin 501 and end points of the second pin 502) and two outfans (first rectification output end 511 and the second rectification output end 512).
Then illustrate that the operation of rectification circuit 810 in certain embodiments is as follows.
When AC signal is in positive half-wave, AC signal sequentially flows into after the first pin 501 (or second pin 502), end points change-over circuit 541, half-wave junction point the 819, second commutation diode 812 and the first rectification output end 511, and is flowed out by another circuit of LED.When AC signal is in negative half-wave, AC signal is also flowed into by another circuit of LED, then flows out after second rectification output end the 512, first commutation diode 811, half-wave junction point 819, end points change-over circuit 541 and the first pin 501 (or second pin 502).
It should be noted that end points change-over circuit 541 can comprise resistance, electric capacity, inductance or a combination thereof, there is at least one in the functions such as current limliting/pressure limiting, protection, current/voltage regulation simultaneously.The explanation of these functions refers in rear explanation.
In actual application, rectification unit 815 and end points change-over circuit 541 can be exchanged and not affect halfwave rectifier function.Refer to Figure 25 D, for the circuit diagram of the rectification circuit according to the present invention the 4th preferred embodiment.The anode of the first commutation diode 811 couples the second pin 502, and the negative terminal of the second commutation diode 812 couples the first pin 501, and the anode of the negative terminal of the first commutation diode 811 and the second commutation diode 812 couples half-wave junction point 819 simultaneously.End points change-over circuit 541 couples half-wave junction point 819, and the first rectification output end 511 and the second rectification output end 512.When AC signal is in positive half-wave, AC signal is also flowed into by another circuit of LED, then flows out after the second rectification output end 512 (or first rectification output end 511), end points change-over circuit 541 half-wave junction point the 819, second commutation diode 812 and the first pin 501.When AC signal is in negative half-wave, AC signal sequentially flows into after second pin the 502, first commutation diode 811, half-wave junction point 819, end points change-over circuit 541 and the first rectification output end 511 (or second rectification output end 512), and is flowed out by another circuit of LED.
What deserves to be explained is, in the embodiment shown in Figure 25 C and Figure 25 D and end points change-over circuit 541 can be omitted, therefore is indicated with dashed lines.After Figure 25 C omits end points change-over circuit 541, the first pin 501 and the second pin 502 are coupled to half-wave junction point 819.After Figure 25 D omits end points change-over circuit 541, the first rectification output end 511 and the second rectification output end 512 are coupled to half-wave junction point 819.
When first pin 501 of the rectification circuit shown in Figure 25 A to Figure 25 D and the second pin 502 are changed to the 3rd pin 503 and four pins 504, can be used as the second rectification circuit 540 shown in Figure 24 B.
Then collocation Figure 24 B illustrates the first rectification circuit 510 and the selection of the second rectification circuit 540 and combination.
First rectification circuit 510 of Figure 24 B illustrated embodiment and the second rectification circuit 540 then can use the arbitrary rectification circuit in Figure 25 A to Figure 25 D, and the rectification circuit shown in Figure 25 C and Figure 25 D can also omit end points change-over circuit 541 and do not affect the rectification function needed for the operation of LED straight lamp.When the rectification circuit of halfwave rectifier of Figure 25 B to Figure 25 D selected by the first rectification circuit 510 and the second rectification circuit 540, along with AC signal is in positive half-wave or negative half-wave, first rectification circuit 510 and the second rectification circuit 540 one of them be responsible for inflow, another is responsible for outflow.Furthermore; if Figure 25 C or Figure 25 D selected by the first rectification circuit 510 and the second rectification circuit 540 simultaneously; or Figure 25 C and Figure 25 D each; then the end points change-over circuit 541 of one of them can have current limliting/pressure limiting, protection, the function of current/voltage regulation, and another end points change-over circuit 541 can omit.
Refer to Figure 26 A, for the circuit diagram of the end points change-over circuit according to the present invention the first preferred embodiment.End points change-over circuit 641 comprises electric capacity 642, and one end of electric capacity 642 couples the first pin 501 and the second pin 502 simultaneously, and the other end couples half-wave junction point 819.Electric capacity 642 has equivalent impedance to AC signal.The frequency of AC signal is the lowest, and the equivalent impedance of electric capacity 642 is the biggest；The frequency of AC signal is the highest, and the equivalent impedance of electric capacity 642 is the least.Therefore, the electric capacity 642 in the end points change-over circuit 641 of the present embodiment has high-pass filtering effect.Furthermore, end points change-over circuit 641 for connecting, and has under equiva lent impedance with the LED component in LED, has the effect of current limliting, pressure limiting to LED component, and the electric current of LED component and cross-pressure can be avoided too high and damage LED component.It addition, select the capacitance of electric capacity 642 by the frequency coordinating AC signal, more LED component can be had the effect of electric current, voltage-regulation.
It should be noted that end points change-over circuit 641 can additionally comprise electric capacity 645 and/or electric capacity 646.Electric capacity 645 one end couples half-wave junction point 819, and the other end couples the 3rd pin 503.Electric capacity 646 one end couples half-wave junction point 819, and the other end couples the 4th pin 504.That is, electric capacity 645 and 646 couples common connection end and the first pin 501 and the second pin 502 with half-wave junction point 819 as common connection end, the electric capacity 642 adjusting electric capacity as electric current.Under such circuit framework, there is the electric capacity 642 and 645 connected between first pin 501 and the second pin 502 one of them and the 3rd pin 503, or have, between the first pin 501 and the second pin 502 one of them and the 4th pin 504, the electric capacity 642 and 646 connected.By the equivalent impedance of the electric capacity of series connection, AC signal is preferably 100-500V by dividing potential drop, the dividing potential drop on electric capacity 645 and 646, more preferably 300-400V.The most referring also to Figure 24 B; the ratio of the equivalent impedance of the electric capacity according to series connection; the cross-pressure in the cross-pressure of electric capacity 642 in the first rectification circuit 510 and filter circuit 520 and LED drive module 530 can be controlled; within the electric current of the LED module flowing through LED drive module 530 is limited to a load current value, and avoids too high voltages to damage filter circuit 520 and LED drive module 530 simultaneously and reach to protect filter circuit 520 and the effect of LED drive module 530.
Refer to Figure 26 B, for the circuit diagram of the end points change-over circuit according to the present invention the second preferred embodiment.End points change-over circuit 741 comprises electric capacity 743 and 744.One end of electric capacity 743 couples the first pin 501, and the other end couples half-wave junction point 819.One end of electric capacity 744 couples the second pin 502, and the other end couples half-wave junction point 819.Compared to the end points change-over circuit 641 shown in Figure 26 A, end points change-over circuit 741 is mainly that electric capacity 642 changes into two electric capacity 743 and 744.The capacitance of electric capacity 743 and 744 can be identical, it is also possible to regard the first pin 501 and the second pin 502 received signal size and as different.
Similarly, end points change-over circuit 741 can additionally comprise electric capacity 745 and/or electric capacity 746, is respectively coupled to the 3rd pin 503 and the 4th pin 504.So, arbitrary in the first pin 501 and the second pin 502 arbitrary with the 3rd pin 503 and the 4th pin 504 all have the electric capacity connected and the function reaching dividing potential drop effect and protection.
Refer to Figure 26 C, for the circuit diagram of the end points change-over circuit according to the present invention the 3rd preferred embodiment.End points change-over circuit 841 comprises electric capacity 842,843 and 844.Electric capacity 842 and 843 is series between the first pin 501 and half-wave junction point 819.Electric capacity 842 and 844 is series between the second pin 502 and half-wave junction point 819.Under such circuit framework, arbitrary short circuit between electric capacity 842,843 and 844, all still suffer from electric capacity between the first pin 501 and half-wave junction point 819 pin and between the second pin 502 and half-wave junction point 819 and the effect of still current limiting.Therefore, when user false touch LED being occurred get an electric shock, excessive current can be avoided to flow through human body and cause user to get an electric shock and injure.
Similarly, end points change-over circuit 841 can additionally comprise electric capacity 845 and/or electric capacity 846, is respectively coupled to the 3rd pin 503 and the 4th pin 504.So, arbitrary in the first pin 501 and the second pin 502 arbitrary with the 3rd pin 503 and the 4th pin 504 all have the electric capacity connected and the function reaching dividing potential drop effect and protection.
Refer to Figure 26 D, for the circuit diagram of the end points change-over circuit according to the present invention the 4th preferred embodiment.End points change-over circuit 941 comprises electric fuse 947,948.Electric fuse 947 one end couples the first pin 501, and the other end couples half-wave junction point 819.Electric fuse 948 one end couples the second pin 502, and the other end couples half-wave junction point 819.Thereby, when the first pin 501 and the arbitrary electric current flowed through of the second pin 502 are higher than the rated current of electric fuse 947 and 948, electric fuse 947 and 948 will fuse accordingly and open a way, and thereby reaches the function of overcurrent protection.
Certainly, the first pin 501 and the second pin 502 in the embodiment of above-mentioned end points change-over circuit change the 3rd pin 503 and the 4th pin 504 (and the 3rd pin 503 and the 4th pin 504 change the first pin 501 and the second pin 502 into) into, can convert to the second rectification circuit 540.
The capacitance of the electric capacity in above-mentioned end points change-over circuit embodiment is preferably between 100pF～100nF.It addition, electric capacity in parallel or series two or above electric capacity can carry out equivalent replacement.Such as: electric capacity 642,842 can replace by two capacitances in series.One of them capacitance of 2 electric capacity can be chosen in the range of 1.0nF～2.5nF, preferably chooses 1.5nF；Another, selected from the scope of 1.5nF～3.0nF, preferably chooses 2.2nF.
Refer to Figure 27 A, for the circuit box schematic diagram of the filter circuit according to the present invention the first preferred embodiment.Drawing the first rectification circuit 510 in figure only in order to represent annexation, not filter circuit 520 comprises the first rectification circuit 510.Filter circuit 520 comprises filter unit 523, couples the first rectification output end 511 and the second rectification output end 512, to receive the rectified signal that rectification circuit is exported, and filters output filtered signal after the ripple in rectified signal.Therefore, the waveform of filtered signal is smoother compared with the waveform of rectified signal.Filter circuit 520 also can further include filter unit 524, it is coupled between rectification circuit and corresponding pin, such as: the first rectification circuit 510 and the first pin the 501, first rectification circuit 510 and the second pin the 502, second rectification circuit 540 and the 3rd pin 503 and the second rectification circuit 540 and the 4th pin 504, in order to characteristic frequency is filtered, to filter the characteristic frequency of external drive signal.At the present embodiment, filter unit 524 is coupled between the first pin 501 and the first rectification circuit 510.Filter circuit 520 also can further include filter unit 525, be coupled between one of them diode of the first pin 501 and the second pin 502 one of them and the first rectification circuit 510 or the 3rd pin 503 and the 4th pin 504 one of them with the second rectification circuit 540 diode of one of them, in order to reduce or to filter electromagnetic interference (EMI).At the present embodiment, filter unit 525 be coupled to the first pin 501 and and one of them diode (not drawing) of the first rectification circuit 510 between.Owing to the visual practical situations of filter unit 524 and 525 is added or omitted, Gu Tuzhong is represented by dotted lines it.
Refer to Figure 27 B, for the circuit diagram of the filter unit according to the present invention the first preferred embodiment.Filter unit 623 comprises an electric capacity 625.One end of electric capacity 625 couples the first rectification output end 511 and the first filtering output end 521, the other end couples the second rectification output end 512 and the second filtering output end 522, so that the rectified signal being exported 512 outputs by the first rectification output end 511 and the second rectification is carried out low-pass filtering, form filtered signal with the radio-frequency component that filters in rectified signal, then exported by the first filtering output end 521 and the second filtering output end 522.
Refer to Figure 27 C, for the circuit diagram of the filter unit according to the present invention the second preferred embodiment.Filter unit 723 is π type filter circuit, comprises electric capacity 725, inductance 726 and electric capacity 727.One end of electric capacity 725 couples the first rectification output end 511 and couples the first filtering output end 521 through inductance 726 simultaneously, and the other end couples the second rectification output end 512 and the second filtering output end 522.Inductance 726 is coupled between the first rectification output end 511 and the first filtering output end 521.One end of electric capacity 727 couples the first rectification output end 511 through inductance 726 and couples the first filtering output end 521 simultaneously, and the other end couples the second rectification output end 512 and the second filtering output end 522.
From the point of view of in equivalence, filter unit more than 623 shown in filter unit 723 relatively Figure 27 B inductance 726 and electric capacity 727.And inductance 726 and electric capacity 727 are also with as electric capacity 725, have low-pass filtering effect.Therefore, the filter unit 723 of the present embodiment, compared to the filter unit 623 shown in Figure 27 B, has more preferably high frequency and filters ability, and the waveform of the filtered signal exported is the most smooth.
The inductance value of the inductance 726 in above-described embodiment is preferably selected from the scope of 10nH～10mH.The capacitance of electric capacity 625,725,727 is preferably selected from the scope of 100pF～1uF.
Refer to Figure 27 D, for the circuit diagram of the filter unit according to the present invention the 3rd preferred embodiment.Filter unit 824 comprises electric capacity 825 and the inductance 828 of parallel connection.One end of electric capacity 825 couples the first pin 501, and the other end couples the first rectification output end 511, so that the external drive signal inputted by the first pin 501 is carried out high-pass filtering, to filter the low-frequency component in external drive signal.One end of inductance 828 couples the first pin 501, and the other end couples the first rectification output end 511, so that the external drive signal inputted by the first pin 501 is carried out low-pass filtering, to filter the radio-frequency component in external drive signal.Therefore, the combination of electric capacity 825 and inductance 828 can present high impedance to characteristic frequency in external drive signal.It is, the electric capacity of parallel connection and inductance present maximum to the equiva lent impedance of external drive signal in characteristic frequency.
Via suitably choosing capacitance and the inductance value of inductance 828 of electric capacity 825, the mid frequency (impedance maximum) of impedance correspondence frequency filter can be made to be positioned in characteristic frequency, mid frequency isWherein L is the inductance value of inductance 828, and C is the capacitance of electric capacity 825.Such as: preferably mid frequency is in the range of 20-30kHz, more preferably 25kHz, the LED therefore with filter unit 824 may conform to the safety requirement of UL certification.
It should be noted that filter unit 824 can comprise resistance 829.Resistance 829 is coupled between the first pin 501 and the first rectification output end 511.Therefore, resistance 829 is connected with electric capacity 825 in parallel, inductance 828.For example, resistance 829 is coupled between the first pin 501 and the electric capacity 825 of parallel connection and inductance 828, or resistance 829 is coupled between the first rectification output end 511 and the electric capacity 825 of parallel connection and inductance 828.At the present embodiment, resistance 829 is coupled between the first pin 501 and the electric capacity 825 of parallel connection and inductance 828.Resistance 829 is in order to adjust electric capacity 825 and the Q-value of lc circuit that inductance 828 is constituted, to be more suitable for the applied environment that different Q value requires.Owing to resistance 829 is inessential assembly, therefore it is represented by dotted lines in the present embodiment.
The capacitance of electric capacity 825 is preferably in the range of 10nF～2uF.The inductance value of inductance 828, preferably less than 2mH, is more preferably less than 1mH, it is possible to use air core inductor or I-shaped inductance.Resistance 829, preferably more than 50 ohm, is more preferably more than 500 ohm.
In addition to the filter circuit shown in the above embodiments, traditional low pass or band filter all can be used in filter circuit as the filter unit of the present invention.
Refer to Figure 27 E, for the circuit diagram of the filter unit according to the present invention the 4th preferred embodiment.In the present embodiment, within filter unit 925 is arranged at the rectification circuit 610 shown in Figure 25 A, to reduce rectification circuit 610 and/or the caused electromagnetic interference of other circuit (EMI).In the present embodiment, filter unit 925 comprises EMI electric capacity, be coupled between the first pin 501 and the anode of commutation diode 614 and be also coupled to simultaneously between the second pin 502 and the anode of the 3rd commutation diode 613, with reduce the first pin 501 and the second pin 502 the positive half-wave transmission of reception alternating current drive signal time adjoint electromagnetic interference.The EMI electric capacity of filter unit 925 is also coupled between the negative terminal and the first pin 501 of the second commutation diode 612 and is also coupled between the negative terminal of the first commutation diode 611 and the second pin 502 simultaneously, with reduce the first pin 501 and the second pin 502 negative half wave loops of reception alternating current drive signal time adjoint electromagnetic interference.nullNamely，Rectification circuit 610 is for full bridge rectifier and comprises the first commutation diode 611、Second commutation diode 612、3rd commutation diode 613 and the 4th commutation diode 614，First commutation diode 611、Second commutation diode 612、Two commutation diode the-the first commutation diodes 611 and the 3rd commutation diode 613 in 3rd commutation diode 613 and the 4th commutation diode 614，Wherein the anode of the 3rd commutation diode 613 and the negative terminal of the first commutation diode 611 connect formation one first filtering junction point，First commutation diode 611、Second commutation diode 612、Another two commutation diode the-the second commutation diode 612 and the 4th commutation diode 614 in 3rd commutation diode 613 and the 4th commutation diode 614，Wherein the anode of the 4th commutation diode 614 and the negative terminal of the second commutation diode 612 connect formation one second filtering junction point，The EMI electric capacity of filter unit 925 is coupled between the first filtering junction point and the second filtering junction point.
Additionally, refer to Figure 25 C and Figure 26 A, Figure 26 B and Figure 26 C, similar, arbitrary electric capacity in one of them circuit of Figure 26 A, Figure 26 B and Figure 26 C is all coupled between arbitrary diode and the first pin 501 and the second pin 502 (or the 3rd pin 503 and the 4th pin 504) in the circuit of Figure 25 C, therefore the arbitrary or whole electric capacity in Figure 26 A, Figure 26 B and Figure 26 C can use as the EMI electric capacity of filter unit, and reduces the function of the electromagnetic interference of circuit.Namely, the first rectification circuit 510 in Figure 24 B can be half-wave rectifying circuit and comprise two rectification two poles, one of them anode of two commutation diodes connect another negative terminal formed the arbitrary or whole electric capacity in half-wave junction point, Figure 26 A, Figure 26 B and Figure 26 C be coupled to the half-wave junction point of two commutation diodes and said two pin at least one；Or and the second rectification circuit 540 in Figure 24 B can be half-wave rectifying circuit and comprise two rectification two poles, one of them anode of two commutation diodes connect another negative terminal formed the arbitrary or whole electric capacity in half-wave junction point, Figure 26 A, Figure 26 B and Figure 26 C be coupled to the half-wave junction point of two commutation diodes and described 3rd pin and described 4th pin at least one.
Furthermore, filter unit 925 couples the first pin 501 and the second pin 502, and equivalent makes between the first pin 501 and the second pin 502 as short circuit.The most referring also to Figure 26 A to Figure 26 C, coordinating filter unit 925 to make between the first pin 501 and the second pin 502 is short-circuit effect, and the electric capacity 645 and 646 in each embodiment, electric capacity 745 and 746, electric capacity 845 and 846 all can omit one of them.No matter external communication signal is exported by the first pin 501 or the second pin 502, electric capacity 645 and 646, electric capacity 745 and 746, electric capacity 845 and 846 still can reach the effect of dividing potential drop after all can omitting one of them.
It should be noted that the EMI electric capacity in Figure 27 E illustrated embodiment can be arranged in pairs or groups with the inductance of filter unit 824 as the electric capacity of the filter unit 824 in Figure 27 D illustrated embodiment, and reach characteristic frequency presents high impedance and reduces the function of electromagnetic interference simultaneously.Namely, when rectification circuit is full bridge rectifier, the electric capacity 825 of filter unit 824 is coupled between the first filtering junction point and the second filtering junction point of full bridge rectifier, when rectification circuit is half-wave rectifying circuit, the electric capacity 825 of filter unit 824 be coupled to the half-wave junction point of half-wave rectifying circuit and said two pin at least one.
Refer to Figure 28 A, for the circuit diagram of the LED module according to the present invention the first preferred embodiment.The anode of LED module 630 couples the first filtering output end 521, and negative terminal couples the second filtering output end 522.LED module 630 comprises the light source at least one LED unit 632, i.e. previous embodiment.It is connected in parallel to each other when LED unit 632 is for two or more.The anode of each LED unit couples the anode of LED module 630, to couple the first filtering output end 521；The negative terminal of each LED unit couples the negative terminal of LED module 630, to couple the second filtering output end 522.LED unit 632 comprises at least one LED component 631.When LED component 631 is plural number, LED component 631 is connected into a string, and the anode of first LED component 631 couples the anode of affiliated LED unit 632, and the negative terminal of first LED component 631 couples the next one (second) LED component 631.And the anode of last LED component 631 couples the negative terminal of previous LED component 631, the negative terminal of last LED component 631 couples the negative terminal of affiliated LED unit 632.
It should be noted that LED module 630 can produce current sense signal S531, represent LED module 630 flows through size of current, to be used as detecting, control LED module 630.
Refer to Figure 28 B, for the circuit diagram of the LED module according to the present invention the second preferred embodiment.The anode of LED module 630 couples the first filtering output end 521, and negative terminal couples the second filtering output end 522.LED module 630 comprises at least two LED unit 732, and the anode of each LED unit 732 couples the anode of LED module 630, and negative terminal couples the negative terminal of LED module 630.LED unit 732 comprises at least two LED component 731, the connected mode of the LED component 731 in affiliated LED unit 732 is as described by Figure 28 A, the negative pole of LED component 731 couples with the positive pole of next LED component 731, and the positive pole of first LED component 731 couples the positive pole of affiliated LED unit 732, and the negative pole of last LED component 731 couples the negative pole of affiliated LED unit 732.Furthermore, also it is connected to each other between the LED unit 732 in the present embodiment.The positive pole of the n-th LED component 731 of each LED unit 732 is connected to each other, and negative pole is also connected to each other.Therefore, the connection between the LED component of the LED module 630 of the present embodiment is netted connection.
Compared to the embodiment of Figure 29 A to Figure 29 G, the LED drive module 530 of above-described embodiment comprises LED module 630 but does not comprises drive circuit.
Similarly, the LED module 630 of the present embodiment can produce current sense signal S531, and represent LED module 630 flows through size of current, to be used as detecting, control LED module 630.
It addition, in actual application, the quantity of the LED component 731 that LED unit 732 is comprised is preferably 15-25, more preferably 18-22.
Refer to Figure 28 C, for the cabling schematic diagram of the LED module according to the present invention the first preferred embodiment.The annexation of the LED component 831 of the present embodiment, with shown in Figure 28 B, illustrates as a example by three LED unit at this.Positive wire 834 receives with cathode conductor 835 and drives signal, to provide electrical power to each LED component 831, for example: positive wire 834 couples the first filtering output end 521 of aforementioned filter circuit 520, cathode conductor 835 couples the second filtering output end 522 of aforementioned filter circuit 520, with signal after accepting filter.For convenience of description, n-th in each LED unit is divided into same LED group 833 by figure.
Positive wire 834 connects first LED component 831 in the LED unit of three, the leftmost side, (left side) positive pole of three LED component in leftmost side LED group 833 the most as shown in the figure, and cathode conductor 835 connects last LED component 831 in three LED unit, (right side) negative pole of three LED component in rightmost side LED group 833 the most as shown in the figure.The negative pole of first LED component 831 of each LED unit, the positive pole of last LED component 831 and the positive pole of other LED component 831 and negative pole then connect through connection wire 839.
In other words, the positive pole of three LED component 831 of leftmost side LED group 833 is connected to each other through positive wire 834, and its negative pole connects wire 839 through the leftmost side and is connected to each other.The positive pole of three LED component 831 of the second from left LED group 833 connects wire 839 through the leftmost side and is connected to each other, and its negative pole is connected to each other through the connection wire 839 of the second from left.It is connected to each other owing to the positive pole of the negative pole of three LED component 831 of leftmost side LED group 833 and three LED component 831 of the second from left LED group 833 all connects wire 839 through the leftmost side, therefore the positive pole of the negative pole of the first of each LED unit LED component and second LED component is connected to each other.The rest may be inferred thus forms netted connection as shown in Figure 28 B.
It should be noted that and connect in wire 839 with the width 836 of the positive pole coupling part of LED component 831 less than the width 837 with the negative polarity connecting portion of LED component 831.Make the area area more than positive pole coupling part of negative polarity connecting portion.Additionally, width 837 less than the width 838 of the part connecting positive pole and another the negative pole being simultaneously connected with in neighbouring two LED component 831 one of them in wire 839, make simultaneously with the area of positive pole and cathode portion more than only with area and the area of positive pole coupling part of negative polarity connecting portion.Therefore, such cabling framework contributes to the heat radiation of LED component.
It addition, positive wire 834 also can include positive wire 834a, cathode conductor 835 also can include negative wire 835a, makes the two ends of LED module be respectively provided with positive pole and negative pole junction point.Such cabling framework can make other circuit of the power supply module of LED, such as: filter circuit the 520, first rectification circuit 510 and the second rectification circuit 540 are couple to LED module by positive pole and the negative pole junction point at either end or two ends simultaneously, increase the elasticity that the configuration of side circuit arranges.
Refer to Figure 28 D, for the cabling schematic diagram of the LED module according to the present invention the second preferred embodiment.The annexation of the LED component 931 of the present embodiment, with shown in Figure 28 A, comprises by three LED unit and each LED unit at this and illustrates as a example by 7 LED component.Positive wire 934 receives with cathode conductor 935 and drives signal, to provide electrical power to each LED component 931, for example: positive wire 934 couples the first filtering output end 521 of aforementioned filter circuit 520, cathode conductor 935 couples the second filtering output end 522 of aforementioned filter circuit 520, with signal after accepting filter.For convenience of description, seven LED component in each LED unit are divided into same LED group 932 by figure.
Positive wire 934 connects (left side) positive pole of first (leftmost side) LED component 931 in each LED group 932.Cathode conductor 935 connects (right side) negative pole of last (rightmost side) LED component 931 in each LED group 932.In each LED group 932, in neighbouring two LED component 931, the negative pole of the LED component 931 of left connects the positive pole of right LED component 931 through connection wire 939.Thereby, the LED component of LED group 932 is connected into a string.
It should be noted that connection wire 939 is in order to connect the negative pole of one of them and another the positive pole of two adjacent LEDs assembly 931.Cathode conductor 935 is in order to connect the negative pole of the LED component 931 of last (rightmost side) of each LED group.Positive wire 934 is in order to connect the positive pole of the LED component 931 of first (leftmost side) of each LED group.Therefore, the area of dissipation of its width and confession LED component is according to said sequence from large to small.It is to say, the width 938 connecting wire 939 is maximum, cathode conductor 935 connects the width 937 of LED component 931 negative pole and takes second place, and the width 936 that positive wire 934 connects LED component 931 positive pole is minimum.Therefore, such cabling framework contributes to the heat radiation of LED component.
It addition, positive wire 934 also can include positive wire 934a, cathode conductor 935 also can include negative wire 935a, makes the two ends of LED module be respectively provided with positive pole and negative pole junction point.Such cabling framework can make other circuit of the power supply module of LED, such as: filter circuit the 520, first rectification circuit 510 and the second rectification circuit 540 are couple to LED module by positive pole and the negative pole junction point at either end or two ends simultaneously, increase the elasticity that the configuration of side circuit arranges.
Furthermore, the cabling shown in Figure 28 C and 28D can realize with flexible circuit board.For example, flexible circuit board has monolayer line layer, form the positive wire 834 in Figure 28 C, positive wire 834a, cathode conductor 835, negative wire 835a with etching mode and connect the positive wire 934 in wire 839, and Figure 28 D, positive wire 934a, cathode conductor 935, negative wire 935a and connect wire 939.
Refer to Figure 28 E, for the cabling schematic diagram of the LED module according to the present invention the 3rd preferred embodiment.The present embodiment system is changed the cabling of the LED module of Figure 28 C into double-deck line layer by monolayer line layer, mainly positive wire 834a and negative wire 835a is changed to second layer line layer.It is described as follows.
The most referring also to Figure 23, flexible circuit board has double-deck line layer, including a first line layer 2a, dielectric layer 2b and the second line layer 2c.Electrically isolate with dielectric layer 2b between first line layer 2a and the second line layer 2c.The first line layer 2a of flexible circuit board forms the positive wire 834 in Figure 28 E, cathode conductor 835 and connects wire 839 with etching mode, to electrically connect the plurality of LED component 831, such as: electrically connect the plurality of LED component and reticulate connection, second line layer 2c is with etching mode positive wire 834a, negative wire 835a, to electrically connect described filter circuit (filtering output end).And at the positive wire 834 of first line layer 2a, the cathode conductor 835 of flexible circuit board, there is layer junction point 834b and 835b.The positive wire 834a of the second line layer 2, negative wire 835a have layer junction point 834c and 835c.Junction point 834b and 835b is relative with layer junction point 834c and 835c position for layer, is for electrically connecting to positive wire 834 and positive wire 834a, and cathode conductor 835 and negative wire 835a.Preferably do the genealogy of law and the position of layer junction point 834b and 835b of ground floor line layer is formed opening to exposing layer junction point 834c and 835c with lower section mat electric layer, then weld with scolding tin, make positive wire 834 and positive wire 834a, and cathode conductor 835 and negative wire 835a are electrically connected to each other.
Similarly, positive wire 934a and negative wire 935a can also be changed to second layer line layer by the cabling of the LED module shown in Figure 28 D, and forms the Wiring structure of double-deck line layer.
It should be noted that the thickness of the second conductive layer of the flexible circuit board with bilayer conductive layer or line layer is preferably thick compared to the thickness of the first conductive layer, thereby can reduce the line loss (pressure drop) on positive wire and negative wire.Furthermore, there is the flexible circuit board flexible circuit board compared to single conductive layer of bilayer conductive layer, owing to the positive wire at two ends, negative wire are moved to the second layer, the width of flexible circuit board can be reduced.On identical tool, the discharge quantity of narrower substrate, more than wider substrate, therefore can improve the production efficiency of LED module.And have the flexible circuit board of bilayer conductive layer relatively on be relatively easy to maintain shape, to increase the reliability produced, such as: the accuracy of welding position during the welding of LED component.
The luminous efficiency of the LED component of the present invention is more than 80lm/W, preferably more than 120lm/W, more preferably more than 160lm/W.LED component can be that the light of monochromatic LED chip blendes together white light through fluorescent material, a length of 430-460nm and 550-560nm of primary waves of its spectrum, or 430-460nm, 540-560nm and 620-640nm.
Refer to Figure 29 A, for the circuit box schematic diagram of the LED according to the present invention the second preferred embodiment.Shown in Figure 24 B, the power supply module of the LED of the present embodiment comprises the first rectification circuit 510 and the second rectification circuit 540, filter circuit 520, LED drive module 530, and LED drive module 530 further include drive circuit 1530 and LED module 630.Drive circuit 1530 is DC-to-DC switching circuit, couple the first filtering output end 521 and the second filtering output end 522, with signal after accepting filter, and carry out electric power conversion with filtered signal is converted into driving signal and export in the first drive output 1521 and the second drive output 1522.LED module 630 couples the first drive output 1521 and the second drive output 1522, and luminous with reception driving signal, the preferably current stabilization of LED module 630 sets current value in one.LED module 630 can be found in the explanation of Figure 28 A to Figure 28 D.
Refer to Figure 29 B, for the circuit box schematic diagram of the drive circuit according to the present invention the first preferred embodiment.Drive circuit comprises controller 1531 and change-over circuit 1532, carries out electric power conversion with the pattern of current source, to drive LED module luminous.Change-over circuit 1532 comprises on-off circuit 1535 and accumulator 1538.Change-over circuit 1532 couples the first filtering output end 521 and the second filtering output end 522, signal after accepting filter, and according to the control of controller 1531, be converted into driving signal and exported by the first drive output 1521 and the second drive output 1522, to drive LED module.Under the control of controller 1531, the driving signal that change-over circuit 1532 is exported is stabling current, and makes LED module stabilized illumination.
Refer to Figure 29 C, for the circuit diagram of the drive circuit according to the present invention the first preferred embodiment.At the present embodiment, drive circuit 1630 is decompression DC to-DC switching circuit, comprises controller 1631 and change-over circuit, and change-over circuit comprises inductance 1632, fly-wheel diode 1633, electric capacity 1634 and switching switch 1635.Drive circuit 1630 couples the first filtering output end 521 and the second filtering output end 522, so that the filtered signal of reception is converted into driving signal, is coupled in the LED module between the first drive output 1521 and the second drive output 1522 to drive.
In the present embodiment, switching switch 1635 is metal-oxide half field effect transistor, has control end, the first end and the second end.First end of switching switch 1635 couples the positive pole of fly-wheel diode 1633, and the second end couples the second filtering output end 522, and control end couples controller 1631 to be made between the first end and the second end as on or off with the control accepting controller 1631.First drive output 1521 couples the first filtering output end 521, and the second drive output 1522 couples one end of inductance 1632, and the other end of inductance 1632 couples the first end of switching switch 1635.Being coupled between the first drive output 1521 and the second drive output 1522 of electric capacity 1634, to stablize the voltage difference between the first drive output 1521 and the second drive output 1522.The negative terminal of fly-wheel diode 1633 couples the first drive output 1521.
Next the running of drive circuit 1630 is described.
Controller 1631 determines conducting and the deadline of switching switch 1635 according to current sense signal S535 and/or S531, and the dutycycle (Duty Cycle) namely controlling switching switch 1635 regulates the size driving signal.Current sense signal S535 system represents the size of current flowing through switching switch 1635.Current sense signal S535 system represents the size of current flowing through the LED module being coupled between the first drive output 1521 and the second drive output 1522.Arbitrary according to current sense signal S531 and S535, controller 1631 can obtain the information of the electric power size that change-over circuit is changed.When switching switch 1635 conducting, the electric current of filtered signal is flowed into by the first filtering output end 521, and is flowed out by the second filtering output end 522 after LED module, inductance 1632, switching switch 1635 through electric capacity 1634 and the first drive output 1521.Now, electric capacity 1634 and inductance 1632 carry out energy storage.When switching switch 1635 cut-off, inductance 1632 and electric capacity 1634 discharge stored energy, and electric current makes LED module still continuous illumination through fly-wheel diode 1633 afterflow to the first drive output 1521.
It should be noted that the inessential assembly of electric capacity 1634 can omit, therefore be represented by dotted lines in the drawings.At some applied environments, the effect of stable LED module electric current can be reached by the characteristic of the change of inductance meeting resistive and omit electric capacity 1634.
Refer to Figure 29 D, for the circuit diagram of the drive circuit according to the present invention the second preferred embodiment.At the present embodiment, drive circuit 1730 is voltage boosting dc to-DC switching circuit, comprises controller 1731 and change-over circuit, and change-over circuit comprises inductance 1732, fly-wheel diode 1733, electric capacity 1734 and switching switch 1735.The filtered signal received by the first filtering output end 521 and the second filtering output end 522 is converted into driving signal by drive circuit 1730, is coupled in the LED module between the first drive output 1521 and the second drive output 1522 to drive.
One end of inductance 1732 couples the first filtering output end 521, and the other end couples positive pole and first end of switching switch 1735 of filter stream diode 1733.Second end of switching switch 1735 couples the second filtering output end 522 and the second drive output 1522.The negative pole of fly-wheel diode 1733 couples the first drive output 1521.Electric capacity 1734 is coupled between the first drive output 1521 and the second drive output 1522.
Controller 1731 couples the control end of switching switch 1735, controls conducting and the cut-off of switching switch 1735 according to current sense signal S531 and/or current sense signal S535.When switching switch 1735 conducting time, electric current is flowed into by the first filtering output end 521, and flow through inductance 1732, switching switch 1735 after flowed out by the second filtering output end 522.Now, the electric current flowing through inductance 1732 increases in time, and inductance 1732 is in energy storage state.Meanwhile, electric capacity 1734 is in de-energized state, persistently to drive LED module luminous.When switching switch 1735 cut-off, inductance 1732 is in de-energized state, and the electric current of inductance 1732 reduces in time.The electric current of inductance 1732 flows to electric capacity 1734 and LED module through fly-wheel diode 1733 afterflow.Now, electric capacity 1734 is in energy storage state.
It should be noted that electric capacity 1734, for omissible assembly, is represented by dotted lines.In the situation that electric capacity 1734 omits, during switching switch 1735 conducting, the electric current of inductance 1732 is not passed through LED module and makes LED module the most luminous；During switching switch 1735 cut-off, the electric current of inductance 1732 flows through LED module through fly-wheel diode 1733 and makes LED module luminous.By the fluorescent lifetime controlling LED module and the size of current flowed through, the mean flow rate that can reach LED module is stable in setting value, and reaches the effect of identical stabilized illumination.
Refer to Figure 29 E, for the circuit diagram of the drive circuit according to the present invention the 3rd preferred embodiment.At the present embodiment, drive circuit 1830 is decompression DC to-DC switching circuit, comprises controller 1831 and change-over circuit, and change-over circuit comprises inductance 1832, fly-wheel diode 1833, electric capacity 1834 and switching switch 1835.Drive circuit 1830 couples the first filtering output end 521 and the second filtering output end 522, so that the filtered signal of reception is converted into driving signal, is coupled in the LED module between the first drive output 1521 and the second drive output 1522 to drive.
First end of switching switch 1835 couples the first filtering output end 521, second end couples the negative pole of fly-wheel diode 1833, and controls end and couple controller 1831 and make the state between the first end and the second end as on or off receiving the control signal of controller 1831.The positive pole of fly-wheel diode 1833 couples the second filtering output end 522.One end of inductance 1832 couples with the second end of switching switch 1835, and the other end couples the first drive output 1521.Second drive output 1522 couples the positive pole of fly-wheel diode 1833.Electric capacity 1834 is coupled between the first drive output 1521 and the second drive output 1522, to stablize the voltage between the first drive output 1521 and the second drive output 1522.
Controller 1831 controls conducting and the cut-off of switching switch 1835 according to current sense signal S531 and/or current sense signal S535.When switching switch 1835 conducting, electric current is flowed into by the first filtering output end 521, and is flowed out by the second filtering output end 522 after flowing through switching switch 1835, inductance the 1832, first drive output 1521 and the second drive output 1522.Now, the voltage of the electric current and electric capacity 1834 that flow through inductance 1832 increases in time, and inductance 1832 and electric capacity 1834 are in energy storage state.When switching switch 1835 cut-off, inductance 1832 is in de-energized state, and the electric current of inductance 1832 reduces in time.Now, the electric current of inductance 1832 returns inductance 1832 through the first drive output 1521 and the second drive output 1522, fly-wheel diode 1833 and forms afterflow.
It should be noted that electric capacity 1834 for assembly can be omitted, graphic in be represented by dotted lines.When electric capacity 1834 omits, no matter switching switch 1835 is on or off, the electric current of inductance 1832 all can flow through the first drive output 1521 and the second drive output 1522 to drive LED module continuous illumination.
Refer to Figure 29 F, for the circuit diagram of the drive circuit according to the present invention the 4th preferred embodiment.At the present embodiment, drive circuit 1930 is decompression DC to-DC switching circuit, comprises controller 1931 and change-over circuit, and change-over circuit comprises inductance 1932, fly-wheel diode 1933, electric capacity 1934 and switching switch 1935.Drive circuit 1930 couples the first filtering output end 521 and the second filtering output end 522, so that the filtered signal of reception is converted into driving signal, is coupled in the LED module between the first drive output 1521 and the second drive output 1522 to drive.
One end of inductance 1932 couples the first filtering output end 521 and the second drive output 1522, and the other end couples the first end of switching switch 1935.Second end of switching switch 1935 couples the second filtering output end 522, and controls end and couple controller 1931 with the control signal according to controller 1931 as on or off.The positive pole of fly-wheel diode 1933 couples the junction point of inductance 1932 and switching switch 1935, and negative pole couples the first drive output 1521.Electric capacity 1934 couples the first drive output 1521 and the second drive output 1522, to be stably coupled to the driving of the LED module between the first drive output 1521 and the second drive output 1522.
Controller 1931 controls conducting and the cut-off of switching switch 1935 according to current sense signal S531 and/or current sense signal S535.When switching switch 1935 conducting time, electric current is flowed into by the first filtering output end 521, and flow through inductance 1932, switching switch 1935 after flowed out by the second filtering output end 522.Now, the electric current flowing through inductance 1932 increases in time, and inductance 1932 is in energy storage state；The voltage of electric capacity 1934 reduces in time, and electric capacity 1934 is in de-energized state, to maintain LED module luminous.When switching switch 1935 cut-off, inductance 1932 is in de-energized state, and the electric current of inductance 1932 reduces in time.Now, the electric current of inductance 1932 returns inductance 1932 through fly-wheel diode the 1933, first drive output 1521 and the second drive output 1522 and forms afterflow.Now, electric capacity 1934 is in energy storage state, and the voltage of electric capacity 1934 increases in time.
It should be noted that electric capacity 1934 for assembly can be omitted, graphic in be represented by dotted lines.When electric capacity 1934 omits, during switching switch 1935 conducting, the electric current of inductance 1932 is not flow through the first drive output 1521 and the second drive output 1522 and makes LED module the most luminous.During switching switch 1935 cut-off, the electric current of inductance 1932 flows through LED module through fly-wheel diode 1933 and makes LED module luminous.By the fluorescent lifetime controlling LED module and the size of current flowed through, the mean flow rate that can reach LED module is stable in setting value, and reaches the effect of identical stabilized illumination.
Refer to Figure 29 G, for the circuit box schematic diagram of the drive circuit according to the present invention the second preferred embodiment.Drive circuit comprises controller 2631 and change-over circuit 2632, carries out electric power conversion with the pattern of adjustable current source, to drive LED module luminous.Change-over circuit 2632 comprises on-off circuit 2635 and accumulator 2638.Change-over circuit 2632 couples the first filtering output end 521 and the second filtering output end 522, signal after accepting filter, and according to the control of controller 2631, be converted into driving signal and exported by the first drive output 1521 and the second drive output 1522, to drive LED module.Controller 2631 receives current sense signal S535 and/or S539, controls the driving signal stabilization of change-over circuit 2632 output in setting on current value.Wherein, the size of current of current sense signal S535 representation switch circuit 2635；Current sense signal S539 represents the size of current of accumulator 2638, such as: the inductive current in accumulator 2638, the electric current etc. that the first drive output 1521 is exported.The arbitrary of current sense signal S535 and S539 all can represent the size that drive circuit is supplied to the electric current Iout of LED module by the first drive output 1521 and the second drive output 1522.Controller 2631 more couples the first filtering output end 521, determines to set the size of current value with the voltage Vin according to the first filtering output end 521.Therefore, the electric current Iout of drive circuit, i.e. set current value, can adjust according to the size of the voltage Vin of the filtered signal that filter circuit is exported.
It should be noted that the generation of above-mentioned current sense signal S535 and S539 can measure in the way of being to utilize resistance or inductance.For example, flow through resistance according to electric current and the pressure reduction that produces in resistance two ends, or utilize mutual inductance inductance and the inductance mutual inductance in accumulator 2638 etc. all can be in order to detecting current.
Above-mentioned circuit framework, is particularly suited for the applied environment that lamp tube drive circuit is electric ballast.Being current source in electric ballast equivalence, its output is not definite value.And the drive circuit as shown in Figure 29 C to Figure 29 F, its power consumption is relevant with the LED component quantity of LED module, can be considered definite value.When the power consumption of the LED module that the output of electric ballast is driven higher than drive circuit, the output voltage of electric ballast can improve constantly, namely the level of the alternating current drive signal that the power supply module of LED is received can constantly rise and cause having more than the assembly of the power supply module of electric ballast and/or LED is pressure and the risk damaged.When the power consumption of the LED module that the output of electric ballast is driven less than drive circuit, the output voltage of electric ballast can constantly reduce, and namely the level of alternating current drive signal can constantly decline and cause the circuit cannot normal operating.
It should be noted that the power needed for LED illumination is already less than the power needed for the fluorescent lightings such as daylight lamp.If using conventional backlight module etc. to control the control mechanism of LED luminance, being applied to traditional drive systems such as electric ballast, the power incompatibility problem that cause different from the power demand of LED of drive system will necessarily be suffered from.Even result in drive system and/or the problem of LED damage.Example adjusts with above-mentioned power so that LED is more compatible with traditional fluorescent lamp lighting system.
Refer to Figure 29 H, for district's line relation schematic diagram of the voltage Vin according to a preferred embodiment of the present invention Yu electric current Iout.Wherein, transverse axis is voltage Vin, and the longitudinal axis is electric current Iout.In one embodiment, when the voltage Vin (i.e. level) of filtered signal is between upper voltage limit value VH and voltage lower limit value VL, electric current Iout maintains initial setting current value.When the voltage Vin of filtered signal is higher than upper voltage limit value VH, electric current Iout (i.e. setting current value) improves with the increase of voltage Vin.Upper voltage limit value VH is higher than voltage lower limit value VL.Preferably slope of a curve rises with voltage Vin and becomes big.When the voltage Vin of filtered signal is less than voltage lower limit value VL, sets current value and reduce with the minimizing of voltage Vin.Preferably slope of a curve reduces with voltage Vin and diminishes.Namely, when voltage Vin is higher than upper voltage limit value VH or is less than voltage lower limit value VL, electricity sets current value and is preferably the quadratic power of voltage Vin or above functional relationship, and makes the increment rate (slip) increment rate (slip) higher than output of power consumption.That is, the described Tuning function system setting current value is as the quadratic power of the level that comprises described filtered signal or above function.
In another embodiment, when the voltage Vin of filtered signal is between upper voltage limit value VH and voltage lower limit value VL, the electric current Iout of LED can be increased or decreased with voltage Vin and linearly increasing or reduce.When voltage Vin is in upper voltage limit value VH, electric current Iout is at upper current value IH；As voltage Vin limit value VL under voltage, electric current Iout is at lower current value IL.Wherein, upper current value IH is higher than lower current value IL.It is, when voltage Vin is between upper voltage limit value VH and voltage lower limit value VL, and electric current Iout is the functional relationship of the first power of voltage Vin.
By above-mentioned design, when the power consumption of the LED module that the output of electric ballast is driven higher than drive circuit, voltage Vin can improve in time and exceed upper voltage limit value VH.When voltage Vin is higher than upper voltage limit value VH, the increment rate of the power consumption of LED module is higher than the increment rate of the output of electric ballast, and in voltage Vin be high balanced voltage VH+ and electric current Iout be high balanced balanced current IH+ time, output equal to power consumption and balance.Now, high balanced voltage VH+ is higher than upper voltage limit value VH, and high balanced balanced current IH+ is higher than upper current value.Otherwise, when voltage Vin is less than voltage lower limit value VL, the slip of the power consumption of LED module higher than the slip of output of electric ballast, and in voltage Vin be low balanced voltage VL-and electric current Iout be low balanced balanced current IL-time, output balances equal to power consumption.Now, low balanced voltage VL-is less than voltage lower limit value VL, and low balanced balanced current IL-is less than lower current value IL.
In a preferred embodiment, voltage lower limit value VL is defined as the 90% of the minimum output voltage of electric ballast, and upper voltage limit value VH is defined as the 110% of maximum output voltage.As a example by full voltage 100-277V AC/60HZ, voltage lower limit value VL is set to 90V (100V*90%), and upper voltage limit value VH is set to 305V (277V*110%).
Coordinate Figure 35 and Figure 36, short circuit board 253 is distinguished into the first short circuit board and the second short circuit board being connected with long circuit board 251 two ends, and on the first short circuit board of short circuit board 253 of being respectively set at of the electronic building brick in power supply module and the second short circuit board.The length dimension of the first short circuit board and the second short circuit board can with rough unanimously, it is also possible to inconsistent.Typically, the 30%～80% of the length dimension that length dimension is the second short circuit board of the first short circuit board (right-hand circuit board of the short circuit board of Figure 35 E 253 and the left side circuit board of the short circuit board 253 of Figure 36).The length dimension of the more preferably first short circuit board is the 1/3～2/3 of the length dimension of the second short circuit board.In this embodiment, the half of the size of the length dimension substantially second short circuit board of the first short circuit board.The size of the second short circuit board is between 15mm～65mm (concrete depending on application scenario).In the lamp holder of one end that the first short circuit board is arranged at LED straight lamp, and described second short circuit board is arranged in the lamp holder of the relative other end of LED straight lamp.
For example, the electric capacity of drive circuit is such as: the electric capacity 1634,1734,1834,1934 in Figure 29 C to Figure 29 F) electric capacity that can be two or more in actual application is formed in parallel.In power supply module, the electric capacity of drive circuit is at least partially or fully arranged on the first short circuit board of short circuit board 253.That is, rectification circuit, filter circuit, the inductance of drive circuit, controller, switching switch, diodes etc. may be contained within the second short circuit board of short circuit board 253.And inductance, controller, switching switch etc. are the higher assembly of temperature in electronic building brick, it is arranged on different circuit boards from part or all of electric capacity, electric capacity (especially electrochemical capacitor) can be made to avoid the assembly because temperature is higher that the life-span of electric capacity is impacted, improve electric capacity reliability.Further, also can be spatially separated from rectification circuit and filter circuit because of electric capacity, solve EMI problem.
The conversion efficiency of the drive circuit of the present invention is more than 80%, preferably more than 90%, more preferably more than 92%.Therefore, when not comprising drive circuit, the luminous efficiency of the LED of the present invention is preferably more than 120lm/W, more preferably more than 160lm/W；And it is preferably more than 120lm/W*90%=108lm/W comprising the luminous efficiency after drive circuit is combined with LED component, more preferably more than 160lm/W*92%=147.2lm/W.
Additionally, it is contemplated that the light transmittance of the diffusion layer of LED straight lamp is more than 85%, therefore, the luminous efficiency of the LED straight lamp of the present invention is preferably more than 108lm/W*85%=91.8lm/W, more preferably 147.2lm/W*85%=125.12lm/W.
Refer to Figure 30 A, for the application circuit block schematic diagram of the power supply module of the LED according to the present invention the 3rd preferred embodiment.Compared to Figure 24 B illustrated embodiment, the present embodiment comprises the first rectification circuit 510 and the second rectification circuit 540, filter circuit 520, LED drive module 530, and more increases anti-flicker circuit 550.Anti-flicker circuit 550 is coupled between filter circuit 520 and LED drive module 530.
Anti-flicker circuit 550 couples the first filtering output end 521 and the second filtering output end 522, with signal after accepting filter, and in during less than particular case, consume the portion of energy of filtered signal, to suppress the ripple of filtered signal to cause the luminous situation about being interrupted of LED drive module 530 to occur.It is said that in general, filter circuit 520 has inductively or capacitively waits electric capacity and the inductance having parasitism on filtering unit, or circuit, and form resonance circuit.Resonance circuit ac supply signal stop provide time, example: user close LED power supply after, the amplitude of its resonance signal can successively decrease in time.But, the LED module of LED is one-way conduction assembly and has minimum conducting voltage.When the valley value of resonance signal is less than the minimum conducting voltage of LED module, and when crest value remains above LED module minimum conducting voltage, the luminescence of LED module there will be scintillation.Anti-flicker circuit can flow through the electric current setting anti-flicker electric current more than at this moment, consumes the portion of energy of filtered signal, and this portion of energy is higher than resonance signal energy difference between crest value and valley value, and suppresses the luminous scintillation of LED module.When signal is close to the minimum conducting voltage of LED module preferably the most after the filtering, the portion of energy of the consumed filtered signal of anti-flicker circuit is higher than resonance signal energy difference between crest value and valley value.
It should be noted that anti-flicker circuit 550 is more suitable for LED drive module 530 and does not comprises the performance of drive circuit 1530.It is to say, when LED drive module 530 comprises LED module 630, and LED module 630 is by applicable cases during the direct driven for emitting lights of the filtered signal of filter circuit.The ripple directly reflecting filtered signal is changed by the luminescence of LED module 630.The setting of anti-flicker circuit 550, by the suppression scintillation that LED is occurred after the power supply closing LED.
Refer to Figure 30 B, for the circuit diagram of the anti-flicker circuit according to a preferred embodiment of the present invention.Anti-flicker circuit 650 comprises at least one resistance, such as: two resistance of series connection, is series between the first filtering output end 521 and the second filtering output end 522.In the present embodiment, anti-flicker circuit 650 persistently consumes the portion of energy of filtered signal.When normal operating, the energy that this portion of energy is consumed much smaller than LED drive module 530.So, when, after power-off, when the level of filtered signal drops near the minimum conducting voltage of LED module 630, anti-flicker circuit 650 still consumes the portion of energy of filtered signal and makes LED module 630 reduce and be interrupted luminous situation.In a preferred embodiment, anti-flicker circuit 650 may be set to when the minimum conducting voltage of LED module 630, flows through more than or equal to an anti-flicker electric current, and can determine the equivalence anti-flicker resistance value of anti-flicker circuit 650 accordingly.
See Figure 31 A, for the application circuit block schematic diagram of the power supply module of the LED according to the present invention the 4th preferred embodiment.Compared to Figure 30 A illustrated embodiment, the present embodiment comprises the first rectification circuit 510 and the second rectification circuit 540, filter circuit 520, LED drive module 530 and anti-flicker circuit 550, and more increases protection circuit 560.Protection circuit 560 couples the first filtering output end 521 and the second filtering output end 522, and detecting filtered signal is to decide whether to enter guard mode.When determining to enter guard mode, the level of protection circuit 560 strangulation filtered signal, to avoid the assembly in LED drive module 530 to be damaged.Wherein, anti-flicker circuit 550 is omissible circuit, is represented by dotted lines in the drawings.
See Figure 31 B, for the circuit diagram of the protection circuit according to a preferred embodiment of the present invention.Protection circuit 660 comprises electric capacity 663 and 670, resistance 669, diode 672, voltage clamping circuit and bleeder circuit, wherein voltage clamping circuit comprises bidirectional triode thyristor (bidirectional triode thyristor, TRIAC) 661 and bidirectional trigger diode (symmetrical trigger diode, DIAC) 662, bleeder circuit comprises the first bipolar junction transistors (bipolar junction transistor, BJT) 667 and second bipolar junction transistors 668, first resistance 665, second resistance 666, 3rd resistance 664 and the 4th resistance 671.Protection circuit 660 enters guard mode when the electric current of LED module and/or overtension, and avoids the damage of LED module.
First end of bidirectional triode thyristor 661 couples the first filtering output end 521, and the second end couples the second filtering output end 522, and controls end and couple the first end of bidirectional trigger diode 662.One end of second end coupling capacitance 663 of bidirectional trigger diode 662, the other end of electric capacity 663 couples the second filtering output end 522.One end of resistance 664 couples the second end of bidirectional trigger diode 662, and the other end couples the second filtering output end 522, and in parallel with electric capacity 663.One end of first resistance 665 couples the second end of bidirectional trigger diode 662, and the other end couples the collector of the first bipolar junction transistors 667.The emitter-base bandgap grading of the first bipolar junction transistors 667 couples the second filtering output end 522.One end of second resistance 666 couples the second end of bidirectional trigger diode 662, and the other end couples collector and the base stage of the first bipolar junction transistors 667 of the second bipolar junction transistors 668.The emitter-base bandgap grading of the second bipolar junction transistors 668 couples the second filtering output end 522.One end of resistance 669 couples the base stage of the second bipolar junction transistors 668, one end of other end coupling capacitance 670.The other end of electric capacity 670 couples the second filtering output end 522.One end of 4th resistance 671 couples the second end of bidirectional trigger diode 662, and the other end couples the negative pole of diode 672.The positive pole of diode 672 couples the first filtering output end 521.
It should be noted that the resistance resistance less than the second resistance 666 of the first resistance 665.
Below the operation of the first overcurrent protection of explanation protection circuit 660.
The junction point of resistance 669 and electric capacity 670 receives current sense signal S531, and wherein current sense signal S531 represents the size of current that LED module flows through.The other end of the 4th resistance 671 couples voltage end 521 '.In this embodiment, voltage end 521 ' can couple a bias generator or as graphic, is couple to the first filtering output end 521 using filtered signal as bias generator through diode 672.When voltage end 521 ' couples extra bias generator, diode 672 can save filter, and in the drawings, diode 672 is represented by dotted lines.The combination of resistance 669 and electric capacity 670 can filter the radio-frequency component of current sense signal S531, and inputs the base stage of the second bipolar junction transistors 668 to control conducting and the cut-off of the second bipolar junction transistors 668 by filtering after current detection signal S531.By resistance 669 and the filter action of electric capacity 670, the misoperation of the second bipolar junction transistors 668 caused because of noise can be avoided.On reality is applied, resistance 669 and electric capacity 670 can omit (therefore resistance 669 and electric capacity 670 are represented by dotted lines in figure), and current sense signal S531 directly inputs the base stage of the second bipolar junction transistors 668.
When LED normal operating, the electric current of LED module is within normal range, the second bipolar junction transistors 668 is cut-off.Now, the base voltage of the first bipolar junction transistors 667 is drawn high and the first bipolar junction transistors 667 is turned on by the second resistance 666.Now, the current potential of the second end of bidirectional trigger diode 662 is according to the voltage of the bias generator of power end 521 ', and the 3rd resistance 664 of the 4th resistance 671 and parallel connection determines with the dividing ratios of the first resistance 665.Owing to the resistance of the first resistance 665 is less, dividing ratios is relatively low thus current potential of the second end of bidirectional trigger diode 662 is relatively low.Now, the control terminal potential of bidirectional triode thyristor 661 is also dragged down by bidirectional trigger diode 662, and bidirectional triode thyristor 661 makes protection circuit 660 be in unprotected state for cut-off.
When the electric current of LED module is more than an overcurrent value, now the level of current sense signal S531 can be too high and make the second bipolar junction transistors 668 turn on.Second bipolar junction transistors 668 can drag down the base stage of the first bipolar junction transistors 667 and make the first bipolar junction transistors 667 for cut-off.Now, the current potential of the second end of bidirectional trigger diode 662 is according to the voltage of the bias generator of power end 521 ', and the 3rd resistance 664 of the 4th resistance 671 and parallel connection determines with the dividing ratios of the second resistance 666.Owing to the resistance of the second resistance 666 is relatively big, dividing ratios is higher thus the current potential of the second end of bidirectional trigger diode 662 is higher.Now, the control terminal potential of bidirectional triode thyristor 661 is also drawn high by bidirectional trigger diode 662, and bidirectional triode thyristor 661 makes protection circuit 660 be in guard mode for conducting with the voltage difference between strangulation the first filtering output end 521 and the second filtering output end 522.
In the present embodiment, the voltage system of bias generator determines according to the dividing ratios of trigger voltage, the 4th resistance 671 and the 3rd resistance 664 of parallel connection of bidirectional triode thyristor 661 and the dividing ratios of the first resistance 665 and the 4th resistance 671 and the 3rd resistance 664 in parallel with the second resistance 666.Thereby, the voltage of bias generator is less than the trigger voltage of bidirectional triode thyristor 661 after the former dividing ratios dividing potential drop, and higher than the trigger voltage of bidirectional triode thyristor 661 after the dividing ratios dividing potential drop of the latter.It is, when the electric current of described LED module is more than overcurrent value, described dividing ratios heightened by bleeder circuit, and reaches the effect that sluggishness compares.It is embodied as aspect, the first bipolar junction transistors 667 and the second bipolar junction transistors 668 as switching switch are connected respectively and are determined the first resistance 665 and the second resistance 666 of dividing ratios, whether bleeder circuit is more than overcurrent value according to the electric current of LED module, determine the first bipolar junction transistors 667 and the cut-off whichever conducting of the second bipolar junction transistors 668 whichever, determine dividing ratios.Voltage clamping circuit decides whether the voltage of strangulation LED module according to the dividing potential drop of bleeder circuit.
Then the operation of the overvoltage protection of explanation protection circuit 660.
The junction point of resistance 669 and electric capacity 670 receives current sense signal S531, and wherein current sense signal S531 represents the size of current that LED module flows through.Therefore, now protection circuit 660 still has the function of current protection.The other end of the 4th resistance 671 couples voltage end 521 ', and in this embodiment, voltage end 521 ' couples the anode of LED module to detect the voltage of LED module.As a example by the above embodiments, in the LED drive module 530 such as embodiment of Figure 28 A and Figure 28 B does not comprises the embodiment of drive circuit 1530, voltage end 521 ' couples the first filtering output end 521；In the LED drive module 530 such as Figure 29 A to Figure 29 G comprise the embodiment of drive circuit 1530, voltage end 521 ' couples the first drive output 1521.In the present embodiment, the dividing ratios of the 3rd resistance 664 of the 4th resistance 671 and parallel connection and the dividing ratios of the first resistance 665 and the 4th resistance 671 and the 3rd resistance 664 in parallel and the second resistance 666 will be regarding the voltage of voltage end 521 ', and the voltage of the i.e. first drive output 1521 or the first filtering output end 521 adjusts.Therefore, the overcurrent protection of protection circuit 660 still can normal operating.
When LED module normal operating, the current potential (being determined with the voltage of voltage end 521 ' with the dividing ratios of the first resistance 665 in parallel and the 3rd resistance 664 by resistance 671) of the second end of bidirectional trigger diode 662 is not enough to trigger bidirectional triode thyristor 661.Now, triggering bidirectional triode thyristor 661 is cut-off, and protection circuit 660 is in unprotected state.Cause the voltage of the anode of LED module more than an overpressure value when LED module operation exception.Now, the current potential of the second end of bidirectional trigger diode 662 higher and make the first end of bidirectional trigger diode 662 exceed trigger bidirectional triode thyristor 661 trigger voltage.Now, triggering bidirectional triode thyristor 661 is conducting, and protection circuit 660 is in guard mode the level of strangulation filtered signal.
As it has been described above, protection control circuit 660 can have stream or over-voltage protecting function, or can have the function of stream and overvoltage protection simultaneously.
It addition, protection circuit 660 can be in the two ends parallel diode of the 3rd resistance 664, with the voltage at strangulation two ends.The breakdown voltage of Zener diode is preferably 25-50V, more preferably 36V.
Furthermore, bidirectional triode thyristor 661 can use thyristor (silicon controlled rectifier, SCR) to replace, and does not affect the defencive function of protection circuit.Especially, pressure drop during conducting can be reduced by employing thyristor pipe.
In one embodiment, the component parameter of protection circuit 660 can set as follows.The resistance of resistance 669 is preferably 10 ohm.The capacitance of electric capacity 670 is preferably 1nf.The capacitance of electric capacity 633 is preferably 10nf.Voltage range 26-36V of bidirectional trigger diode 662.The resistance of the 4th resistance 671 is preferably 300K-600K ohm, more preferably 540K ohm.The resistance of the second resistance 666 is preferably 100K-300K ohm, more preferably 220K ohm.The resistance of the first resistance 665 is preferably 30K-100K ohm, more preferably 40K ohm.The resistance of the 3rd resistance 664 is preferably 100K-300K ohm, more preferably 220K ohm.
See Figure 32 A, for the application circuit block schematic diagram of the power supply module of the LED according to the present invention the 5th preferred embodiment.Compared to Figure 29 A illustrated embodiment, the present embodiment comprises the first rectification circuit 510 and the second rectification circuit 540, filter circuit 520, the LED drive module 530 that comprises drive circuit 1530 and LED module 630, and more increases mode switching circuit 580.Mode switching circuit 580 couple the first filtering output end 521 and the second filtering output end 522 at least one and the first drive output 1521 and the second drive output 1522 at least one, carry out the first drive pattern or the second drive pattern in order to determining.Wherein, filtered signal input driving circuit 1530, the second drive pattern system are at least bypassed the part assembly of drive circuit 1530 by the first drive pattern system, make drive circuit 1530 stop operation and are directly inputted by filtered signal and drive LED module 630.The part assembly of bypassed drive circuit 1530 comprises inductance or switching switch, makes drive circuit 1530 cannot be carried out electric power conversion and stop operation.Certainly, if the electric capacity of drive circuit 1530 exists and do not omits, still the effect of the voltage at stable LED module two ends can be reached in order to filter the ripple of filtered signal.When mode switching circuit 580 determines the first drive pattern and during by filtered signal input driving circuit 1530, filtered signal is converted into driving signal to drive LED module 630 luminous by drive circuit 1530.When mode switching circuit 580 determines that filtered signal is directly transported to LED module 630 and bypassed drive circuit 1530 by the second drive pattern, in equivalence, filter circuit 520 is the drive circuit of LED module 630, the driving signal that filter circuit 520 provides filtered signal to be LED module, to drive LED module luminous.
It should be noted that, mode switching circuit 580 can be judged via first pin the 501, second pin the 502, the 3rd pin 503 and the 4th pin 504 received signal according to what the order of user or detecting LED accepted, and determines the first drive pattern or the second drive pattern.By mode switching circuit, the power supply module of LED can corresponding different applied environment or drive system, and adjust suitable drive pattern, thus improve the compatibility of LED.
See Figure 32 B, for the circuit diagram of the mode switching circuit according to the present invention the first preferred embodiment.Mode switching circuit 680 comprises mode selector switch 681, it is adaptable to the drive circuit 1630 shown in Figure 29 C.The most referring also to Figure 32 B and Figure 29 C, mode selector switch 681 has three end points 683,684,685, and end points 683 couples the second drive output 1522, and end points 684 couples the second filtering output end 522 and end points 685 couples the inductance 1632 of drive circuit 1630.
When mode switching circuit 680 determines first mode, mode selector switch 681 turns on the first current path of end points 683 and 685 and ends the second current path of end points 683 and 684.Now, the second drive output 1522 couples with inductance 1632.Therefore, drive circuit 1630 normal operation, after being accepted filter by the first filtering output end 521 and the second filtering output end 522 signal and be converted into driving signal driven LED module by the first drive output 1521 and the second drive output 1522.
When mode switching circuit 680 determines the second pattern, mode selector switch 681 turns on the second current path of end points 683 and 684 and ends the first current path of end points 683 and 685.Now, the second filtering output end 522 couples with the second drive output 1522.Therefore, drive circuit 1630 decommissions.Filtered signal is inputted by the first filtering output end 521 and the second filtering output end 522 and is directly driven LED module by the first drive output 1521 and the second drive output 1522, and bypasses inductance 1632 and the switching switch 1635 of drive circuit 1630.
See Figure 32 C, for the circuit diagram of the mode switching circuit according to the present invention the second preferred embodiment.Mode switching circuit 780 comprises mode selector switch 781, it is adaptable to the drive circuit 1630 shown in Figure 29 C.The most referring also to Figure 32 C and Figure 29 C, mode selector switch 781 has three ends 783,784,785, end points 783 couples the second filtering output end 522, and end points 784 couples the second drive output 1522 and end points 785 couples the switching switch 1635 of drive circuit 1630.
When mode switching circuit 780 determines first mode, mode selector switch 781 turns on the first current path of end points 783 and 785 and ends the second current path of end points 783 and 784.Now, the second filtering output end 522 couples with switching switch 1635.Therefore, drive circuit 1630 normal operation, after being accepted filter by the first filtering output end 521 and the second filtering output end 522 signal and be converted into driving signal driven LED module by the first drive output 1521 and the second drive output 1522.
When mode switching circuit 780 determines the second pattern, mode selector switch 781 turns on the second current path of end points 783 and 784 and ends the first current path of end points 783 and 785.Now, the second filtering output end 522 couples with the second drive output 1522.Therefore, drive circuit 1630 decommissions.Filtered signal is inputted by the first filtering output end 521 and the second filtering output end 522 and is directly driven LED module by the first drive output 1521 and the second drive output 1522, and bypasses inductance 1632 and the switching switch 1635 of drive circuit 1630.
See Figure 32 D, for the circuit diagram of the mode switching circuit according to the present invention the 3rd preferred embodiment.Mode switching circuit 880 comprises mode selector switch 881, it is adaptable to the drive circuit 1730 shown in Figure 29 D.The most referring also to Figure 32 D and Figure 29 D, mode selector switch 881 has three end points 883,884,885, and end points 883 couples the first filtering output end 521, and end points 884 couples the first drive output 1521 and end points 885 couples the inductance 1732 of drive circuit 1730.
When mode switching circuit 880 determines first mode, mode selector switch 881 turns on the first current path of end points 883 and 885 and ends the second current path of end points 883 and 884.Now, the first filtering output end 521 couples with inductance 1732.Therefore, drive circuit 1730 normal operation, after being accepted filter by the first filtering output end 521 and the second filtering output end 522 signal and be converted into driving signal driven LED module by the first drive output 1521 and the second drive output 1522.
When mode switching circuit 880 determines the second pattern, mode selector switch 881 turns on the second current path of end points 883 and 884 and ends the first current path of end points 883 and 885.Now, the first filtering output end 521 couples with the first drive output 1521.Therefore, drive circuit 1730 decommissions.Filtered signal is inputted by the first filtering output end 521 and the second filtering output end 522 and is directly driven LED module by the first drive output 1521 and the second drive output 1522, and bypasses inductance 1732 and the fly-wheel diode 1733 of drive circuit 1730.
See Figure 32 E, for the circuit diagram of the mode switching circuit according to the present invention the 4th preferred embodiment.Mode switching circuit 980 comprises mode selector switch 981, it is adaptable to the drive circuit 1730 shown in Figure 29 D.The most referring also to Figure 32 E and Figure 29 D, mode selector switch 981 has three end points 983,984,985, end points 983 couples the first drive output 1521, and end points 984 couples the first filtering output end 521 and end points 985 couples the negative pole of fly-wheel diode 1733 of drive circuit 1730.
When mode switching circuit 980 determines first mode, mode selector switch 981 turns on the first current path of end points 983 and 985 and ends the second current path of end points 983 and 984.Now, negative pole and first filtering output end 521 of fly-wheel diode 1733 couples.Therefore, drive circuit 1730 normal operation, after being accepted filter by the first filtering output end 521 and the second filtering output end 522 signal and be converted into driving signal driven LED module by the first drive output 1521 and the second drive output 1522.
When mode switching circuit 980 determines the second pattern, mode selector switch 981 turns on the second current path of end points 983 and 984 and ends the first current path of end points 983 and 985.Now, the first filtering output end 521 couples with the first drive output 1521.Therefore, drive circuit 1730 decommissions.Filtered signal is inputted by the first filtering output end 521 and the second filtering output end 522 and is directly driven LED module by the first drive output 1521 and the second drive output 1522, and bypasses inductance 1732 and the fly-wheel diode 1733 of drive circuit 1730.
See Figure 32 F, for the circuit diagram of the mode switching circuit according to the present invention the 5th preferred embodiment.Mode switching circuit 1680 comprises mode selector switch 1681, it is adaptable to the drive circuit 1830 shown in Figure 29 E.The most referring also to Figure 32 F and Figure 29 E, mode selector switch 1681 has three end points 1683,1684,1685, end points 1683 couples the first filtering output end 521, and end points 1684 couples the first drive output 1521 and end points 1685 couples the switching switch 1835 of drive circuit 1830.
When mode switching circuit 1680 determines first mode, mode selector switch 1681 turns on the first current path of end points 1683 and 1685 and ends the second current path of end points 1683 and 1684.Now, the first filtering output end 521 couples with switching switch 1835.Therefore, drive circuit 1830 normal operation, after being accepted filter by the first filtering output end 521 and the second filtering output end 522 signal and be converted into driving signal driven LED module by the first drive output 1521 and the second drive output 1522.
When mode switching circuit 1680 determines the second pattern, mode selector switch 1681 turns on the second current path of end points 1683 and 1684 and ends the first current path of end points 1683 and 1685.Now, the first filtering output end 521 couples with the first drive output 1521.Therefore, drive circuit 1830 decommissions.Filtered signal is inputted by the first filtering output end 521 and the second filtering output end 522 and is directly driven LED module by the first drive output 1521 and the second drive output 1522, and bypasses inductance 1832 and the switching switch 1835 of drive circuit 1830.
See Figure 32 G, for the circuit diagram of the mode switching circuit according to the present invention the 6th preferred embodiment.Mode switching circuit 1780 comprises mode selector switch 1781, it is adaptable to the drive circuit 1830 shown in Figure 29 E.The most referring also to Figure 32 G and Figure 29 E, mode selector switch 1781 has three end points 1783,1784,1785, end points 1783 couples the first filtering output end 521, and end points 1784 couples the first drive output 1521 and end points 1785 couples the inductance 1832 of drive circuit 1830.
When mode switching circuit 1780 determines first mode, mode selector switch 1781 turns on the first current path of end points 1783 and 1785 and ends the second current path of end points 1783 and 1784.Now, the first filtering output end 521 couples with inductance 1832.Therefore, drive circuit 1830 normal operation, after being accepted filter by the first filtering output end 521 and the second filtering output end 522 signal and be converted into driving signal driven LED module by the first drive output 1521 and the second drive output 1522.
When mode switching circuit 1780 determines the second pattern, mode selector switch 1781 turns on the second current path of end points 1783 and 1784 and ends the first current path of end points 1783 and 1785.Now, the first filtering output end 521 couples with the first drive output 1521.Therefore, drive circuit 1830 decommissions.Filtered signal is inputted by the first filtering output end 521 and the second filtering output end 522 and is directly driven LED module by the first drive output 1521 and the second drive output 1522, and bypasses inductance 1832 and the switching switch 1835 of drive circuit 1830.
See Figure 32 H, for the circuit diagram of the mode switching circuit according to the present invention the 7th preferred embodiment.Mode switching circuit 1880 comprises mode selector switch 1881 and 1882, it is adaptable to the drive circuit 1930 shown in Figure 29 F.The most referring also to Figure 32 H and Figure 29 F, mode selector switch 1881 has three end points 1883,1884,1885, end points 1883 couples the first drive output 1521, and end points 1884 couples the first filtering output end 521 and end points 1885 couples the fly-wheel diode 1933 of drive circuit 1930.Mode selector switch 1882 has three end points 1886,1887,1888, and end points 1886 couples the second drive output 1522, and end points 1887 couples the second filtering output end 522 and end points 1888 couples the first filtering output end 521.
When mode switching circuit 1880 determines first mode, mode selector switch 1881 turns on the first current path of end points 1883 and 1885 and ends the second current path of end points 1883 and 1884, and mode selector switch 1882 turns on the 3rd current path of end points 1886 and 1888 and ends the 4th current path of end points 1886 and 1887.Now, the first drive output 1521 couples with fly-wheel diode 1933, and the first filtering output end 521 couples with the second drive output 1522.Therefore, drive circuit 1930 normal operation, after being accepted filter by the first filtering output end 521 and the second filtering output end 522 signal and be converted into driving signal driven LED module by the first drive output 1521 and the second drive output 1522.
When mode switching circuit 1880 determines the second pattern, mode selector switch 1881 turns on the second current path of end points 1883 and 1884 and ends the first current path of end points 1883 and 1885, and mode selector switch 1882 turns on the 4th current path of end points 1886 and 1887 and ends the 3rd current path of end points 1886 and 1888.Now, the first filtering output end 521 couples with the first drive output 1521, and the second filtering output end 522 couples with the second drive output 1522.Therefore, drive circuit 1930 decommissions.Filtered signal is inputted by the first filtering output end 521 and the second filtering output end 522 and is directly driven LED module by the first drive output 1521 and the second drive output 1522, and bypasses fly-wheel diode 1933 and the switching switch 1935 of drive circuit 1930.
See Figure 32 I, for the circuit diagram of the mode switching circuit according to the present invention the 8th preferred embodiment.Mode switching circuit 1980 comprises mode selector switch 1981 and 1982, it is adaptable to the drive circuit 1930 shown in Figure 29 F.The most referring also to Figure 32 I and Figure 29 F, mode selector switch 1981 has three end points 1983,1984,1985, end points 1983 couples the second filtering output end 522, and end points 1984 couples the second drive output 1522 and end points 1985 couples the switching switch 1935 of drive circuit 1930.Mode selector switch 1982 has three end points 1986,1987,1988, and end points 1986 couples the first filtering output end 521, and end points 1987 couples the first drive output 1521 and end points 1988 couples the second drive output 1522.
When mode switching circuit 1980 determines first mode, mode selector switch 1981 turns on the first current path of end points 1983 and 1985 and ends the second current path of end points 1983 and 1984, and mode selector switch 1982 turns on the 3rd current path of end points 1986 and 1988 and ends the 4th current path of end points 1986 and 1987.Now, the second filtering output end 522 couples with switching switch 1935, and the first filtering output end 521 couples with the second drive output 1522.Therefore, drive circuit 1930 normal operation, after being accepted filter by the first filtering output end 521 and the second filtering output end 522 signal and be converted into driving signal driven LED module by the first drive output 1521 and the second drive output 1522.
When mode switching circuit 1980 determines the second pattern, mode selector switch 1981 turns on the second current path of end points 1983 and 1984 and ends the first current path of end points 1983 and 1985, and mode selector switch 1982 turns on the 4th current path of end points 1986 and 1987 and ends the 3rd current path of end points 1986 and 1988.Now, the first filtering output end 521 couples with the first drive output 1521, and the second filtering output end 522 couples with the second drive output 1522.Therefore, drive circuit 1930 decommissions.Filtered signal is inputted by the first filtering output end 521 and the second filtering output end 522 and is directly driven LED module by the first drive output 1521 and the second drive output 1522, and bypasses fly-wheel diode 1933 and the switching switch 1935 of drive circuit 1930.
It should be noted that the mode selector switch in above-described embodiment can be single-pole double-throw switch (SPDT), or two semiconductor switch (such as: metal-oxide half field effect transistor), one of them is conducting to be used for switching two current paths, and another is cut-off.Current path system, in order to provide the guiding path of filtered signal, makes the electric current of filtered signal flow through one of them to the function reaching model selection.For example, the most referring also to Figure 24 A, when lamp tube drive circuit 505 does not exists and is directly supplied electricity to LED straight lamp 500 by alternating current power supply 508, mode switching circuit may decide that first mode, by drive circuit, filtered signal is converted into driving signal, the level making driving signal can mate the level needed for LED module luminescence, and is correctly driven LED module luminous.In the presence of lamp tube drive circuit 505, mode switching circuit may decide that the second pattern, filtered signal directly drive LED module luminous；Or first mode can also be determined, still by drive circuit, filtered signal is converted into driving signal to drive LED module luminous.
See Figure 33 A, for the application circuit block schematic diagram of the power supply module of the LED according to the present invention the 6th preferred embodiment.Compared to Figure 24 B illustrated embodiment, the daylight lamp of the present embodiment comprises the first rectification circuit 510 and the second rectification circuit 540, filter circuit 520 and LED drive module 530, and more increases ballast compatible circuit 1510.Ballast compatible circuit 1510 can be coupled between the first pin 501 and/or the second pin 502 and rectification circuit 510.In the present embodiment, explanation as a example by ballast compatible circuit 1510 is coupled between the first pin 501 and rectification circuit.The most referring also to Figure 24 A, lamp tube drive circuit 505 is electric ballast, it is provided that alternating current drive signal is to drive the LED of the present embodiment.
At the beginning of starting due to the drive system of lamp tube drive circuit 505, fan-out capability is promoted to normal condition the most completely.But, at the beginning of starting, the power supply module of LED turns on and receives the alternating current drive signal that lamp tube drive circuit 505 is provided immediately.At the beginning of this can cause startup, lamp tube drive circuit 505 has load to start smoothly immediately.For example, output power taking that the intraware of lamp tube drive circuit 505 is changed from it and maintain the operation after startup, output voltage cannot normally rise and cause starting unsuccessfully, or the Q-value of the resonance circuit of lamp tube drive circuit 505 change because of the addition of the load of LED and cannot startup etc. smoothly.
The ballast compatible circuit 1510 of the present embodiment is at the beginning of starting, open-circuit condition will be presented, the energy making alternating current drive signal cannot input to LED module, and the time delay being set just entrance conducting state, makes the energy of alternating current drive signal start input to LED lamp module.Above-mentioned ballast compatible circuit 1510 in the alternating current drive signal as external drive signal starts to input LED straight lamp in setting time delay for cut-off, for conducting after described setting time delay, after thereby the starting characteristic of the operation simulation of LED fluorescent lamp drives power initiation, after one period of time delay, internal gas just discharges and luminous.Therefore, ballast compatible circuit 1510 further improves the compatibility to the lamp tube drive circuits such as electric ballast 505.
See Figure 33 B, for the application circuit block schematic diagram of the power supply module of the LED according to the present invention the 7th preferred embodiment.Compared to Figure 33 A illustrated embodiment, the ballast compatible circuit 1510 of the present embodiment can be coupled between the 3rd pin 503 and/or the 4th pin 504 and the second rectification circuit 540.Such as the explanation of ballast compatible circuit 1510 in Figure 33 A, ballast compatible circuit 1510 has the effect of delayed start, makes the time that the input delay of alternating current drive signal sets, it is to avoid the lamp tube drive circuits such as electric ballast 505 start failed problem.
Ballast compatible circuit 1510 is except being placed between pin and rectification circuit in addition to as above-described embodiment, it is also possible to the framework of corresponding different rectification circuit and within rearranging to rectification circuit.Refer to Figure 33 C, for the circuit configuration schematic diagram of the ballast compatible circuit according to present pre-ferred embodiments.In the present embodiment, rectification circuit system uses the circuit framework of the rectification circuit 810 shown in Figure 25 C.Rectification circuit 810 comprises rectification unit 815 and end points change-over circuit 541.Rectification unit 815 couples the first pin 501 and the second pin 502, and end points change-over circuit 541 couples the first rectification output end 511 and the second rectification output end 512, and ballast compatible circuit 1510 is coupled between rectification unit 815 and end points change-over circuit 541.At the beginning of starting, alternating current drive signal as external drive signal starts to input LED straight lamp, alternating current drive signal is only capable of through rectification unit 815, and cannot pass through end points change-over circuit 541 and the filter circuit of inside and LED drive module etc., and the parasitic capacitance of the first commutation diode 811 in rectification unit 815 and the second commutation diode 812 is fairly small negligible.Therefore, the equivalent electric perhaps inductance of the power supply module of LED does not couple lamp tube drive circuit 505 at the beginning of starting, thus does not affect the Q-value of lamp tube drive circuit 505 and lamp tube drive circuit 505 can be made along starting.
It should be noted that, on the premise of end points change-over circuit 541 does not comprise and inductively or capacitively waits assembly, the exchange of rectification unit 815 and end points change-over circuit 541 is (i.e., rectification unit 815 couples the first rectification output end 511 and the second rectification output end 512, and end points change-over circuit 541 couples the first pin 501 and the second pin 502 has no effect on the function of ballast compatible circuit 1510.
Furthermore, such as the explanation of Figure 25 A to Figure 25 D, when the first pin 501 of rectification circuit and the second pin 502 are changed to the 3rd pin 503 and four pins 504, can be used as the second rectification circuit 540.That is, the function of ballast compatible circuit 1510 is not affected in the circuit configuration of above-mentioned ballast compatible circuit 1510 can also be changed to the second rectification circuit 540.
Additionally, end points change-over circuit 541 does not comprise inductively or capacitively assembly such as grade as before, or when the first rectification circuit 510 or the second rectification circuit 540 use rectification circuit 610 as shown in fig. 25 a, the parasitic capacitance of the first rectification circuit 510 or the second rectification circuit 540 is fairly small, does not also interfere with the Q-value of lamp tube drive circuit 505.
See Figure 33 D, for the application circuit block schematic diagram of the power supply module of the LED according to the present invention the 8th preferred embodiment.Compared to Figure 33 A illustrated embodiment, the ballast compatible circuit 1510 of the present embodiment is coupled between the second rectification circuit 540 and filter circuit 520.Described above, the second rectification circuit 540 in the present embodiment does not comprise inductively or capacitively assembly such as grade, does not the most affect the function of ballast compatible circuit 1510.
See Figure 33 E, for the application circuit block schematic diagram of the power supply module of the LED according to the present invention the 9th preferred embodiment.Compared to Figure 33 A illustrated embodiment, the ballast compatible circuit 1510 of the present embodiment is coupled between rectification circuit 510 and filter circuit 520.Similarly, the rectification circuit 510 in the present embodiment does not comprise inductively or capacitively assembly such as grade, does not the most affect the function of ballast compatible circuit 1510.
See Figure 33 F, for the circuit diagram of the ballast compatible circuit according to the present invention the first preferred embodiment.Original state in ballast compatible circuit 1610 is that between ballast compatibility input 1611 and ballast compatibility outfan 1621, equivalence is upper for open circuit.Ballast compatible circuit 1610 is after ballast compatibility input 1611 receives signal, and the time that is set just turns on ballast compatibility input 1611 and the compatible outfan of ballast 1621, makes ballast compatibility input 1611 received signal be sent to ballast compatibility outfan 1621.
Ballast compatible circuit 1610 comprises diode 1612, resistance 1613,1615,1618,1620 and 1622, bidirectional triode thyristor 1614, bidirectional trigger diode 1617, electric capacity 1619, ballast compatibility input 1611 and ballast compatibility outfan 1621.Wherein, the resistance of resistance 1613 is quite big, and therefore when bidirectional triode thyristor 1614 ends, between ballast compatibility input 1611 and ballast compatibility outfan 1621, equivalence is upper for open circuit.
Bidirectional triode thyristor 1614 is coupled between ballast compatibility input 1611 and ballast compatibility outfan 1621, and resistance 1613 is also coupled between ballast compatibility input 1611 and ballast compatibility outfan 1621 in parallel with bidirectional triode thyristor 1614.Diode 1612, resistance 1620,1622 and electric capacity 1619 are sequentially series between ballast compatibility input 1611 and ballast compatibility outfan 1621, and in parallel with bidirectional triode thyristor 1614.The positive pole of diode 1612 is connected with bidirectional triode thyristor 1614, and negative pole is connected to one end of resistance 1620.Bidirectional triode thyristor 1614 control end be connected with one end of bidirectional trigger diode 1617, the other end of bidirectional trigger diode 1617 is connected with one end of resistance 1618, resistance 1618 other end coupling capacitance 1619 and the connection end of resistance 1622.Resistance 1615 is coupled between control end and the connection end of resistance 1613 and electric capacity 1619 of bidirectional triode thyristor 1614.Wherein, resistance 1615,1618,1620 can omit, and Gu Tuzhong is represented by dotted lines.When resistance 1618 omits, the other end of bidirectional trigger diode 1617 is directly connected to the connection end of electric capacity 1619 and resistance 1622.When resistance 1620 omits, the negative pole of diode 1612 is directly connected to resistance 1622.
When alternating current drive signal (such as: high frequency that electric ballast is exported, high-voltage AC signal) starts to be input to ballast compatibility input 1611, bidirectional triode thyristor 1614 is first in open-circuit condition, makes alternating current drive signal cannot input and make LED be also at open-circuit condition.Alternating current drive signal starts to charge electric capacity 1619 through diode 1612, resistance 1620,1622, makes the voltage of electric capacity 1619 be gradually increasing.Persistently after charging a period of time, the voltage of electric capacity 1619 increases above the threshold values of bidirectional trigger diode 1617 and makes triggering bidirectional trigger diode 1617 turn on.Then, the bidirectional trigger diode 1617 of conducting triggers bidirectional triode thyristor 1614, makes bidirectional triode thyristor 1614 be also switched on.Now, the bidirectional triode thyristor 1614 of conducting is electrically connected with ballast compatibility input 1611 and ballast compatibility outfan 1621, makes alternating current drive signal input via ballast compatibility input 1611 and ballast compatibility outfan 1621, makes the power supply module of LED start operation.It addition, the energy stored by electric capacity 1619 maintains bidirectional triode thyristor 1614 to turn on, cause the cut-off once again of bidirectional triode thyristor 11614, i.e. ballast compatible circuit 1610 to avoid the exchange of alternating current drive signal to change, or be repeated on the problem of change between conducting and cut-off.
When the application circuit to Figure 33 C or Figure 33 D applied by the ballast compatible circuit 1610 of the present embodiment, owing to ballast compatible circuit 1610 receives the signal after rectification unit or rectifier circuit rectifies, diode 1612 can omit.Bidirectional triode thyristor 1614 can use thyristor (Silicon Controlled Rectifier; SCR) replace; bidirectional trigger diode 1617 can replace with solid discharging tube (Thyristor Surge Suppresser), and does not affect the defencive function of protection circuit.Especially, pressure drop during conducting can be reduced by employing thyristor pipe.
Through hundreds of millisecond after lamp tube drive circuit 505 startups such as general electric ballast, the output voltage of electric ballast can bring up to be unlikely on certain voltage value to be added by the load of LED to be affected.Especially, the output AC voltage of the instantaneous starting type electric ballast of part the most rough can maintain the electricity value definite value a bit of time, such as: 0.01 second, voltage definite value now is at below 300V, the most just begin to ramp up, and outfan has the addition of any load in a bit of time at this, all it is likely to result in instantaneous starting type electric ballast and cannot draw high output AC voltage smoothly；Particularly, when the civil power that input voltage is 120V or following of instantaneous starting type electric ballast, it is easier to occur.It addition, the lamp tube drive circuits such as electric ballast 505 can be provided with the detecting of fluorescent lamp whether lighting, if the non-lighting of overtime fluorescent lamp, judge that fluorescent lamp is abnormal and enter guard mode.Therefore, the time delay of ballast compatible circuit 1610, preferably more than 0.01 second, is more preferably between 0.1 second to 3 second.
It should be noted that resistance 1622 can extra shunt capacitance 1623.The effect of electric capacity 1623 is to react the instantaneous variation of voltage difference between ballast compatibility input 1611 and ballast compatibility outfan 1621, and does not affect the effect of the turn on delay of ballast compatible circuit 1610.
Refer to Figure 33 G, for the application circuit block schematic diagram of the power supply module of the LED straight lamp according to the present invention the tenth preferred embodiment.Compared to Figure 24 A illustrated embodiment, the lamp tube drive circuit 505 of the present embodiment is all equiped with ballast compatible circuit 1610 in driving the LED straight lamp 500 of multiple series connection, and each LED straight lamp 500.For convenience of description, explanation as a example by the LED straight lamp 500 of two series connection below.
Because the time delay of the ballast compatible circuit 1610 in two LED straight lamps 500 has different time delay because of the impact of the factors such as device process error, therefore the ON time of two ballast compatible circuits 1610 is not consistent.When lamp tube drive circuit 505 starts, the voltage of the alternating current drive signal that lamp tube drive circuit 505 is provided substantially is divided equally by two LED straight lamps 500 to be born.When then when ballast compatible circuit 1610, one of them first turns on, the voltage of the alternating current drive signal of lamp tube drive circuit 505 nearly falls on the another LED straight lamp 500 not yet turned on.This makes the cross-pressure on the ballast compatible circuit 1610 of the LED straight lamp 500 not yet turned on double suddenly, and i.e. between ballast compatibility input 1611 and ballast compatibility outfan 1621, voltage difference doubles suddenly.Existence due to electric capacity 1623, the dividing potential drop effect of electric capacity 1619 and 1623, the voltage of electric capacity 1619 can be drawn high moment so that bidirectional trigger diode 1617 touches bidirectional triode thyristor 1614 and turns on, and makes the ballast compatible circuit 1610 of two LED straight lamps 500 almost simultaneously turn on.By the addition of electric capacity 1623, can avoid between the LED straight lamp of series connection because of difference time delay of ballast compatible circuit 1610, cause the problem that the bidirectional triode thyristor 1614 in the ballast compatible circuit 1610 first turned on ends once again because maintaining the electric current turned on not enough.Therefore, the ballast compatible circuit 1610 adding electric capacity 1623 can change the compatibility of the LED straight lamp connected further.
On reality is applied, the suggestion capacitance of electric capacity 1623 is between 10pF～1nF, preferably 10pF～100PF, more preferably 47pF.
It should be noted that diode 1612 is to carry out rectification in order to the signal charging electric capacity 1619.Therefore, referring to Figure 33 C, Figure 33 D and Figure 33 E, the applicable cases after ballast compatible circuit 1610 is configured at rectification unit or rectification circuit, diode 1612 can omit.Therefore, in Figure 33 F, diode 1612 is represented by dotted lines.
See Figure 33 H, for the circuit diagram of the ballast compatible circuit according to the present invention the second preferred embodiment.Original state in ballast compatible circuit 1710 is for open circuit between ballast compatibility input 1711 and ballast compatibility outfan 1721.Ballast compatible circuit 1710 receives signal in ballast compatibility input 1711, as ending when the level of external drive signal sets deferred telegram level values less than one, level in external drive signal is more than when setting deferred telegram level values as turning on, and makes ballast compatibility input 1711 received signal be sent to ballast compatibility outfan 1721.Set deferred telegram level values preferably more than or equal to 400V.
Ballast compatible circuit 1710 comprises bidirectional triode thyristor 1712, bidirectional trigger diode 1713, resistance 1714,1716 and 1717 and electric capacity 1715.First end of bidirectional triode thyristor 1712 couples ballast compatibility input 1711, controls end and couples one end and one end of resistance 1714 of bidirectional trigger diode 1713, and the other end of the second end coupling resistance 1714.One end of electric capacity 1715 couples the other end of bidirectional trigger diode 1713, and the other end couples the second end of bidirectional triode thyristor 1712.Resistance 1717 is in parallel with electric capacity 1715, is therefore also coupled to the other end of bidirectional trigger diode 1713 and the second end of bidirectional triode thyristor 1712.One end of resistance 1716 couples the junction point of bidirectional trigger diode 1713 and electric capacity 1715, and the other end couples ballast compatibility outfan 1721.
When alternating current drive signal (such as: high frequency that electric ballast is exported, high-voltage AC signal) starts to be input to ballast compatibility input 1711, bidirectional triode thyristor 1712 is first in open-circuit condition, makes alternating current drive signal cannot input and make LED be also at open-circuit condition.The input of alternating current drive signal can cause pressure reduction between the ballast compatibility input 1711 and ballast compatibility outfan 1721 of ballast compatible circuit 1710.When alternating current drive signal becomes big and in time reaching enough amplitude (setting deferred telegram level values) after a period of time in time, and the level of ballast compatibility outfan 1721 is reacted to the control end of bidirectional triode thyristor 1712 through resistance 1716, electric capacity 1715 in parallel and resistance 1717 and resistance 1714 and triggers bidirectional triode thyristor 1712 and turn on.Now, ballast compatible circuit 1710 turns on and makes LED normal operating.After bidirectional triode thyristor 1712 turns on, resistance 1716 flows through electric current, and charges electric capacity 1715 to store certain voltage in electric capacity 1715.Energy stored by electric capacity 1715 maintains bidirectional triode thyristor 1712 to turn on, and causes the cut-off once again of bidirectional triode thyristor 1712, i.e. ballast compatible circuit 1710 to avoid the exchange of alternating current drive signal to change, or is repeated on the problem of change between conducting and cut-off.
See Figure 33 I, for the circuit diagram of the ballast compatible circuit according to the present invention the 3rd preferred embodiment.Ballast compatible circuit 1810 comprises shell 1812, metal electrode 1813, bimetal leaf 1814 and heater strip 1816.Metal electrode 1813 and heater strip 1816 are passed by shell 1812, and therefore part is in shell 1812, part outside shell 1812, and and part outside shell there is ballast compatibility input 1811 and ballast compatibility outfan 1821.Shell 1812 is sealing state, is inside filled with inertia body 1815, such as: helium.Bimetal leaf 1814 is positioned at shell 1812, with heater strip 1816 in the part physical within shell 1812 and electric connection.Having certain intervals between bimetal leaf 1814 and metal electrode 1813, therefore ballast compatibility input 1811 and ballast compatibility outfan 1821 are not electrically connected with in original state.Bimetal leaf 1814 has the sheet metal of two different temperature coefficients, and the sheet metal temperature coefficient near metal electrode 1813 side is relatively low, and higher from metal electrode 1813 sheet metal temperature coefficient farther out.
When alternating current drive signal (such as: high frequency that electric ballast is exported, high-voltage AC signal) starts to be input to ballast compatibility input 1811 and ballast compatibility outfan 1821, between metal electrode 1813 and heater strip 1816, potential difference can be formed.When potential difference greatly to can puncture noble gas 1815 there is arc discharge time, namely become big and in time reaching to set deferred telegram level values after a period of time in time when alternating current drive signal, noble gas 1815 heating makes bimetal leaf 1814 expand and close (seeing the direction of figure line arrow) toward metal electrode 1813, and makes bimetal leaf 1814 and metal electrode 1813 close and formation rationality and electric connection.Now, ballast compatibility input 1811 and ballast compatibility outfan 1821 turn on each other.Then, alternating current drive signal flows through heater strip 1816, makes heater strip 1816 generate heat.Now, heater strip 1816 in metal electrode 1813 with described bimetal leaf 1814 for electric conducting state time flow through an electric current, make the temperature of bimetal leaf 1814 maintain and turn on temperature more than a setting.The sheet metal of two different temperature coefficients of bimetal leaf 1814 maintains more than setting conducting temperature because of temperature, and makes bimetal leaf 1814 touch to metal electrode 1813 deviation, thus maintains the closure state of bimetal leaf 1814 and metal electrode 1813.Therefore, ballast compatible circuit 1810 is after ballast compatibility input 1811 and ballast compatibility outfan 1821 receive signal, and the time that is set just turns on ballast compatibility input 1811 and ballast compatibility outfan 1821.
Therefore, the ballast compatible circuit of the present invention, can be coupled between arbitrary pin and arbitrary rectification circuit, set in external drive signal starts to input LED straight lamp in time delay as cut-off, for conducting after setting time delay, or the level in external drive signal is more than as turning on when setting deferred telegram level values as cut-off, the level in external drive signal less than when setting deferred telegram level values, and further improves the compatibility to the lamp tube drive circuits such as electric ballast 505.
Refer to Figure 34 A, for the application circuit block schematic diagram of the power supply module of the LED straight lamp according to the present invention the 11st preferred embodiment.Compared to Figure 24 B illustrated embodiment, the daylight lamp of the present embodiment comprises the first rectification circuit 510 and the second rectification circuit 540, filter circuit 520 and LED drive module 530, and more increases by two ballast compatible circuits 1540.Two ballast compatible circuits 1540 are respectively coupled between the 3rd pin 503 and the first rectification output end 511 and between the 4th pin 504 and the first rectification output end 511.The most referring also to Figure 24 A, lamp tube drive circuit 505 is electric ballast, it is provided that alternating current drive signal is to drive the LED of the present embodiment.
The original state of two ballast compatible circuits 1540 is conducting, and ends after a period of time.Therefore, at the beginning of lamp tube drive circuit 505 starts, alternating current drive signal flows through LED through the 3rd pin 503, corresponding ballast compatible circuit 1540 and the first rectification output end 511 and the first rectification circuit 510 or the 4th pin 504, corresponding ballast compatible circuit 1540 and the first rectification output end 511 and the first rectification circuit 510, and has bypassed the filter circuit 520 within LED and LED drive module 530.Thereby, at the beginning of lamp tube drive circuit 505 starts, LED equivalent zero load, LED does not affect the Q-value of lamp tube drive circuit 505 at the beginning of lamp tube drive circuit 505 starts and makes lamp tube drive circuit 505 to start smoothly.Two ballast compatible circuits 1540 ended after a period of time, and now lamp tube drive circuit 505 starts the most smoothly, it is possible to start to drive LED.
Refer to Figure 34 B, for the application circuit block schematic diagram of the power supply module of the LED straight lamp according to the present invention the 12nd preferred embodiment.Compared to Figure 34 A illustrated embodiment, the configuration of the two ballast compatible circuits 1540 of the present embodiment changes into being respectively coupled between the 3rd pin 503 and the second rectification output end 512 and between the 4th pin 504 and the second rectification output end 512.Similarly, the original state of two ballast compatible circuits 1540 is conducting, and ends after a period of time, makes lamp tube drive circuit 505 just start after starting smoothly to drive LED luminous.
It should be noted that, the configuration of two ballast compatible circuits 1540 can also change into being respectively coupled between the first pin 501 and the first rectification output end 511 and between the second pin 502 and the first rectification output end 511, or change into being respectively coupled between the first pin 501 and the second rectification output end 512 and between the second pin 502 and the second rectification output end 512, lamp tube drive circuit 505 still can be made just to start after starting smoothly to drive LED luminous.
Refer to Figure 34 C, for the application circuit block schematic diagram of the power supply module of the LED straight lamp according to the present invention the 13rd preferred embodiment.Compared to the embodiment shown in Figure 34 A and Figure 34 B, second rectification circuit 540 of the present embodiment changes the rectification circuit 810 adopted shown in Figure 25 C, wherein rectification unit 815 couples the 3rd pin 503 and the 4th pin 504, and end points change-over circuit 541 couples the first rectification output end 511 and the second rectification output end 512.The configuration of two ballast compatible circuits 1540 also changes into being respectively coupled between the first pin 501 and half-wave junction point 819 and between the second pin 502 and half-wave junction point 819.
At the beginning of lamp tube drive circuit 505 starts, the original state of two ballast compatible circuits 1540 is conducting, alternating current drive signal flows through LED through the first pin 501, corresponding ballast compatible circuit 1540, half-wave junction point 819 and rectification unit 815 or the second pin 502, corresponding ballast compatible circuit 1540 and half-wave junction point 819 and rectification unit 815, and has bypassed the end points change-over circuit 541 within LED, filter circuit 520 and LED drive module 530.Thereby, at the beginning of lamp tube drive circuit 505 starts, LED equivalent zero load, LED does not affect the Q-value of lamp tube drive circuit 505 at the beginning of lamp tube drive circuit 505 starts and makes lamp tube drive circuit 505 to start smoothly.Two ballast compatible circuits 1540 ended after a period of time, and now lamp tube drive circuit 505 starts the most smoothly, it is possible to start to drive LED.
It should be noted that, the embodiment of Figure 34 C can also change the first rectification circuit 510 into and use the rectification circuit 810 shown in Figure 25 C, wherein rectification unit 815 couples the first pin 501 and the second pin 502, and end points change-over circuit 541 couples the first rectification output end 511 and the second rectification output end 512；The configuration of two ballast compatible circuits 1540 also changes into being respectively coupled between the 3rd pin 503 and half-wave junction point 819 and between the 4th pin 504 and half-wave junction point 819.So, ballast compatible circuit 1540 still can make lamp tube drive circuit 505 just start after starting smoothly to drive LED luminous.
Refer to Figure 34 D, for the circuit diagram of the ballast compatible circuit according to the present invention the 3rd preferred embodiment, can apply to the embodiment shown in Figure 34 A to Figure 34 C and the variation described in corresponding explanation.
Ballast compatible circuit 1640 comprises resistance 1643,1645,1648 and 1650, electric capacity 1644 and 1649；Diode 1647 and 1652, bipolar junction transistors 1646 and 1651, ballast compatibility input 1641 and ballast compatibility outfan 1642.Resistance 1645 one end connects the compatible input of ballast 1641, and the other end couples the emitter-base bandgap grading of bipolar junction transistors 1646.The collector of bipolar junction transistors 1646 couples the positive pole of diode 1647, and the negative pole of diode 1647 couples ballast compatibility outfan 1642.Resistance 1643 and electric capacity 1644 are series between emitter-base bandgap grading and the collector of bipolar junction transistors 1646, and the junction point of resistance 1643 and electric capacity 1644 couples the base stage of bipolar junction transistors 1646.Resistance 1650 one end connects ballast compatibility outfan 1642, and the other end couples the emitter-base bandgap grading of bipolar junction transistors 1651.The collector of bipolar junction transistors 1651 couples the positive pole of diode 1652, and the negative pole of diode 1652 couples the compatible input of ballast 1641.Resistance 1648 and electric capacity 1649 are series between emitter-base bandgap grading and the collector of bipolar junction transistors 1651, and the junction point of resistance 1648 and electric capacity 1649 couples the base stage of bipolar junction transistors 1651.
When the lamp tube drive circuit 505 of electric ballast just starts, the voltage of electric capacity 1644 and 1649 is 0, and now the base stage of bipolar junction transistors 1646 and 1651 flows through certain electric current and is in short-circuit condition (i.e. conducting state).Therefore, at the beginning of lamp tube drive circuit 505 activates, ballast compatible circuit 1640 is in the conduction state.Electric capacity 1644 is charged by alternating current drive signal through resistance 1643 and diode 1647, similarly charges electric capacity 1649 through resistance 1648 and diode 1652.After certain time, the voltage of electric capacity 1644 and 1649 is increased to a certain degree, makes the voltage of resistance 1643 and 1648 reduce and end bipolar junction transistors 1646 and 1651 (i.e. cut-off state), and therefore ballast compatible circuit 1640 transfers off state to.So circuit running design can be avoided in lamp tube drive circuit 505 because of the Q-value inductively or capacitively affecting lamp tube drive circuit 505 of the power supply module internal of LED, it is ensured that the smooth startup of lamp tube drive circuit 505.Therefore, ballast compatible circuit 1640 can improve the LED compatibility to electric ballast.
From the foregoing, two ballast compatible circuits of the present invention, it is respectively coupled between a junction point (the i.e. first rectification output end 511 and the second rectification output end 512 one of them) and the first pin 501 and rectification circuit and the junction point of filter circuit and second pin 502 of rectification circuit and filter circuit, or it is respectively coupled between rectification circuit and the junction point of filter circuit and the 3rd pin 503 and rectification circuit and the junction point of filter circuit and the 4th pin 504, for conducting in setting time delay in described external drive signal starts to input described LED straight lamp, in described setting time delay after for cut-off, improve the LED compatibility to electric ballast.
Refer to Figure 35 A, for the application circuit block schematic diagram of the power supply module of the LED straight lamp according to the present invention the 14th preferred embodiment.Compared to Figure 24 B illustrated embodiment, the LED straight lamp of the present embodiment comprises the first rectification circuit 510 and the second rectification circuit 540, filter circuit 520 and LED drive module 530, and more increases by two filament artificial circuits 1560.Two filament artificial circuits 1560 are respectively coupled between the first pin 501 and the second pin 502 and are coupled between the 3rd pin 503 and the 4th pin 504, in order to improve the compatibility of the lamp tube drive circuit with filament detecting, such as: there is preheating function electric ballast.
There is the lamp tube drive circuit of filament detecting at the beginning of starting, the abnormal conditions that the filament of fluorescent tube the most normally and is not short-circuited or opens a way can be detected.When judging that filament occurs abnormal, lamp tube drive circuit can stop and entering guard mode.In order to avoid lamp tube drive circuit to judge, LED is abnormal, and two filament artificial circuits 1560 can emulate normal filament, and it is luminous to make lamp tube drive circuit normally start driving LED.
Refer to Figure 35 B, for the circuit diagram of the filament artificial circuit according to the present invention the first preferred embodiment.Filament artificial circuit 1660 comprises electric capacity 1663 and the resistance 1665 of parallel connection, and the respective two ends of electric capacity 1663 and resistance 1665 are respectively coupled to filament analog end 1661 and 1662.The most referring also to Figure 35 A, the filament emulation end 1661 and 1662 of two filament artificial circuits 1660 couples the first pin 501 and the second pin 502 and the 3rd pin 503 and the 4th pin 504.When lamp tube drive circuit output detection signal with test filament whether normal time, detection signal lamp tube drive circuit can be made to judge through electric capacity 1663 in parallel and resistance 1665 filament is normal.
It should be noted that the capacitance of electric capacity 1663 is little.During the high frequency ac signal therefore exported when lamp tube drive circuit formally drives LED, the resistance of the remote small resistor 1665 of the capacitive reactance (equivalent resistance) of electric capacity 1663.Thereby, filament artificial circuit 1660 is when LED normal operating, and the power consumed is fairly small and has little influence on the luminous efficiency of LED.
Refer to Figure 35 C, for the circuit diagram of the filament artificial circuit according to the present invention the second preferred embodiment.In the present embodiment, the first rectification circuit 510 and/or the second rectification circuit 540 use the rectification circuit 810 shown in Figure 25 C but omit end points change-over circuit 541, and by the function of filament artificial circuit 1660 replacement end points change-over circuit 541.That is, the filament artificial circuit 1660 of the present embodiment has filament emulation and end points translation function simultaneously.The most referring also to Figure 35 A, the filament emulation end 1661 and 1662 of filament artificial circuit 1660 couples the first pin 501 and the second pin 502 and/or the 3rd pin 503 and the 4th pin 504.The half-wave junction point 819 of the rectification unit 815 in rectification circuit 810 couples filament analog end 1662.
Refer to Figure 35 D, for the circuit diagram of the filament artificial circuit according to the present invention the 3rd preferred embodiment.Compared to the embodiment shown in Figure 35 C, half-wave junction point 819 changes coupling filament analog end 1661 into, and the filament artificial circuit 1660 of the present embodiment has filament emulation and end points translation function the most simultaneously.
Refer to Figure 35 E, for the circuit diagram of the filament artificial circuit according to the present invention the 4th preferred embodiment.Filament artificial circuit 1760 comprises electric capacity 1763 and 1764, and resistance 1765 and 1766.Electric capacity 1763 and 1764 is series between filament analog end 1661 and 1662.Resistance 1765 and 1766 is also series between filament analog end 1661 and 1662, and the junction point of the junction point of resistance 1765 and 1766 and electric capacity 1763 and 1764 couples.The most referring also to Figure 35 A, the filament emulation end 1661 and 1662 of two filament artificial circuits 1760 couples the first pin 501 and the second pin 502 and the 3rd pin 503 and the 4th pin 504.When lamp tube drive circuit output detection signal with test filament whether normal time, detection signal can through the electric capacity 1763 of series connection and 1764 and resistance 1765 and 1766 and make lamp tube drive circuit judge filament is normal.
It should be noted that the capacitance of electric capacity 1763 and 1764 is little.Therefore when the high frequency ac signal that lamp tube drive circuit formally drives LED and exports, the resistance of the resistance 1765 and 1766 of the remote little series connection of capacitive reactance of the electric capacity 1763 and 1764 of series connection.Thereby, filament artificial circuit 1760 is when LED normal operating, and the power consumed is fairly small and has little influence on the luminous efficiency of LED.Furthermore, electric capacity 1763 or the arbitrary open circuit of resistance 1765 or short circuit, or electric capacity 1764 or the arbitrary open circuit of resistance 1766 or short circuit, still can flow through the detection signal that lamp tube drive circuit is exported between filament analog end 1661 and 1662.Therefore, electric capacity 1763 or the arbitrary open circuit of resistance 1765 or short circuit and/or electric capacity 1764 or the arbitrary open circuit of resistance 1766 or short circuit, filament artificial circuit 1760 still can normal operation and there is at a relatively high serious forgiveness.
In the embodiment of above-mentioned filament artificial circuit, electric capacity can be with Ceramics electric capacity or metallized polypropylene electric capacity, such as: Class2 ceramic condenser, X2 electric capacity.When electric capacity selects X2 electric capacity, capacitance is less than 100nF, and has low internal resistance.Therefore, it can the current reduction flowing through filament artificial circuit 1760 to tens mA, minimizing loss；And heat that internal resistance is caused is the least, temperature can be more than 70 degree, even between 50-60 degree.
When circuit design is to use flexible base plate to make the active and passive block of LED component and power module all or partly can arrange same flexible base plate or different flexible base plates, when designing with the structure of simplification LED, electric capacity preferably selects X7R chip ceramic capacitor, and its capacitor's capacity is preferably more than 100nF.
Refer to Figure 35 F, for the circuit diagram of the filament artificial circuit according to the present invention the 5th preferred embodiment.In the present embodiment, the first rectification circuit 510 and/or the second rectification circuit 540 use the rectification circuit 810 shown in Figure 25 C but omit end points change-over circuit 541, and by the function of filament artificial circuit 1860 replacement end points change-over circuit 541.That is, the filament artificial circuit 1860 of the present embodiment has filament emulation and end points translation function the most simultaneously.Filament artificial circuit 1860 has the resistance of negative temperature coefficient, and the resistance when temperature height is less than the resistance when temperature is low.In the present embodiment, filament artificial circuit 1860 contains two negative temperature coefficient resisters 1863 and 1864, is series between filament analog end 1661 and 1662.The most referring also to Figure 35 A, the filament emulation end 1661 and 1662 of filament artificial circuit 1860 couples the first pin 501 and the second pin 502 and/or the 3rd pin 503 and the 4th pin 504.The half-wave junction point 819 of the rectification unit 815 in rectification circuit 810 couples the junction point of negative temperature coefficient resister 1863 and 1864.
When lamp tube drive circuit output detection signal with test filament whether normal time, detection signal lamp tube drive circuit can be made to judge through negative temperature coefficient resister 1863 and 1864 filament is normal.And negative temperature coefficient resister 1863 and 1864 is because of test signal or preheating program, temperature is gradually increasing and reduces resistance.When lamp tube drive circuit formally drives LED luminescence, the resistance of negative temperature coefficient resister 1863 and 1864 is reduced to relative low value, and reduces the loss of power consumption.
The resistance of filament artificial circuit 1860 is preferably 10 ohm or above and during in LED stable operation when room temperature 25 DEG C, and the resistance of filament artificial circuit 1860 is down to 2～10 ohm；More preferably, when LED stable operation the resistance of filament artificial circuit 1860 between 3～6 ohm.
Refer to Figure 36 A, for the application circuit block schematic diagram of the power supply module of the LED straight lamp according to the present invention the 15th preferred embodiment.Compared to Figure 24 B illustrated embodiment, the LED straight lamp of the present embodiment comprises the first rectification circuit 510 and the second rectification circuit 540, filter circuit 520 and LED drive module 530, and more increases overvoltage crowbar 1570.Overvoltage crowbar 1570 couples the first filtering output end 521 and the second filtering output end 522, to detect filtered signal, and when the level of filtered signal is higher than setting overpressure value, and the level of strangulation filtered signal.Therefore, overvoltage crowbar 1570 can protect the assembly of LED drive module 530 not damage because crossing high pressure.
Refer to Figure 36 B, for the circuit diagram of the overvoltage crowbar according to present pre-ferred embodiments.Overvoltage crowbar 1670 comprises Zener diode 1671, such as: Zener diode (Zener Diode), couples the first filtering output end 521 and the second filtering output end 522.Zener diode 1671 turned on when the voltage difference (that is, the level of filtered signal) of the first filtering output end 521 and the second filtering output end 522 reaches breakdown voltage, made voltage difference strangulation on breakdown voltage.Breakdown voltage is preferably in the range of 40-100V, the scope of more preferably 55-75V.
Refer to Figure 37 A, for the application circuit block schematic diagram of the power supply module of the LED straight lamp according to the present invention the 16th preferred embodiment.Compared to the embodiment of Figure 35 A, the LED of the present embodiment comprises the first rectification circuit 510 and the second rectification circuit 540, filter circuit 520, LED drive module 530 and two filament artificial circuits 1560, and more increases ballast circuit for detecting 1590.Ballast circuit for detecting 1590 can be coupled to rectification circuit corresponding in arbitrary and the first rectification circuit 510 and second rectification circuit 540 of first pin the 501, second pin the 502, the 3rd pin 503 and the 4th pin 504.In the present embodiment, ballast circuit for detecting 1590 is coupled between the first pin 501 and the first rectification circuit 510.
Ballast circuit for detecting 1590 detects alternating current drive signal or the signal inputted through first pin the 501, second pin the 502, the 3rd pin 503 and the 4th pin 504, and judges whether the signal inputted is provided by electric ballast according to detecting result.
Refer to Figure 37 B, for the application circuit block schematic diagram of the power supply module of the LED straight lamp according to the present invention the 17th preferred embodiment.Compared to the embodiment of Figure 37 A, second rectification circuit 540 of the present embodiment uses the rectification circuit 810 shown in Figure 25 C.Ballast circuit for detecting 1590 is coupled between rectification unit 815 and end points change-over circuit 541.Rectification unit 815 and end points change-over circuit 541 one of them couple the 3rd pin 503 and the 4th pin 504, another couples the first rectification output end 511 and the second rectification output end 512.At the present embodiment, rectification unit 815 couples the 3rd pin 503 and the 4th pin 504, and end points change-over circuit 541 couples the first rectification output end 511 and the second rectification output end 512.Similarly, ballast circuit for detecting 1590 detects the signal inputted by the 3rd pin 503 or the 4th pin 504, according to the frequency of signal to determine whether that electric ballast is provided.
Furthermore, the present embodiment can also change and used the rectification circuit 810 shown in Figure 25 C by the first rectification circuit 510, and is coupled to by ballast circuit for detecting 1590 between rectification unit 815 and end points change-over circuit 541.
Refer to Figure 37 C, for the circuit box schematic diagram of the ballast circuit for detecting according to present pre-ferred embodiments.Ballast circuit for detecting 1590 comprises circuit for detecting 1590a and switching circuit 1590b.Switching circuit 1590b couples the first switch terminal 1591 and the second switch terminal 1592.Circuit for detecting 1590a couples sense terminal 1593 and 1594 and flows through the signal of sense terminal 1593 and 1594 with detecting.Or, it is also possible to omit sense terminal 1593 and 1594 and be commonly coupled to the first switch terminal 1591 and the second switch terminal 1592 and flow through the first switch terminal 1591 and signal of the second switch terminal 1592 with detecting.Therefore, graphic middle sense terminal 1593 and 1594 is represented by dotted lines.
Refer to Figure 37 D, for the circuit diagram of the ballast circuit for detecting according to the present invention the first preferred embodiment.Ballast circuit for detecting 1690 comprises circuit for detecting 1690a and switching circuit 1690b, is coupled between the first switch terminal 1591 and the second switch terminal 1592.Circuit for detecting 1690a comprises bidirectional trigger diode 1691, resistance 1692 and 1696 and electric capacity 1693,1697 and 1698.Switching circuit 1690b comprises bidirectional triode thyristor 1699 and inductance 1694.
Electric capacity 1698 is coupled between the first switch terminal 1591 and the second switch terminal 1592, flows through the first switch terminal 1591 and the signal of the second switch terminal 1592 in order to react and produces detecting voltage.When signal is high-frequency signal, the capacitive reactance of electric capacity 1698 is at a fairly low, and the detecting voltage produced is fairly small.When signal is low frequency signal or direct current signal, the capacitive reactance of electric capacity 1698 is at a relatively high, and the detecting voltage produced is at a relatively high.Resistance 1692 and electric capacity 1693 are series at the two ends of electric capacity 1698, and the detecting voltage being produced electric capacity 1698 is filtered and detects voltage after the junction point of resistance 1692 and electric capacity 1693 produces filtering.The filter action system of resistance 1692 and electric capacity 1693 is in order to filter the high-frequency noise of detecting voltage, with the misoperation avoiding high-frequency noise to cause.Resistance 1696 and electric capacity 1697 are series at the two ends of electric capacity 1693, in order to be transferred to one end of bidirectional trigger diode 1691 by detecting voltage after filtering.Resistance 1696 and electric capacity 1697 carry out second time to detecting voltage after filtering simultaneously and filter, and make the filter effect of circuit for detecting 1690a more preferably change.According to different application and noise filtering demand, electric capacity 1697 can select to omit and one end of bidirectional trigger diode 1691 is coupled to resistance 1692 and the junction point of electric capacity 1693 through resistance 1696；Or, resistance 1696 and electric capacity 1697 omit simultaneously and one end of bidirectional trigger diode 1691 is coupled directly to resistance 1692 and the junction point of electric capacity 1693.Therefore, resistance 1696 and electric capacity 1697 are represented by dotted lines in the drawings.The other end of bidirectional trigger diode 1691 is coupled to the control end of the bidirectional triode thyristor 1699 of switching circuit 1690b.Bidirectional trigger diode 1691 is according to the signal level size received, to decide whether that producing control signal 1695 turns on to trigger bidirectional triode thyristor 1699.First end of bidirectional triode thyristor 1699 couples the first switch terminal 1591, and the second end couples the second switch terminal 1592 through inductance 1694.The effect of inductance 1694 is to protect bidirectional triode thyristor 1699 not and exceedes the switching current changing rate of voltage peak and maximum repeatedly under maximum switching voltage build-up rate, cut-off state and damage because flowing through the signal of the first switch terminal 1591 and the second switch terminal 1592.
When the signal that the first switch terminal 1591 and the second switch terminal 1592 receive is low-frequency ac signal or direct current signal, the detecting voltage of electric capacity 1698 is by sufficiently high and make bidirectional trigger diode 1691 produce control signal 1695 to trigger bidirectional triode thyristor 1699.Now, it is short circuit between the first switch terminal 1591 and the second switch terminal 1592, and has bypassed the circuit that switching circuit 1690b is in parallel, such as: be connected to the circuit between the first switch terminal 1591 and the second switch terminal 1592, circuit for detecting 1690a, electric capacity 1698 etc..
When the signal that the first switch terminal 1591 and the second switch terminal 1592 receive is high frequency ac signal, the detecting voltage of electric capacity 1698 is not sufficient to make bidirectional trigger diode 1691 produce control signal 1695 to trigger bidirectional triode thyristor 1699.Now, bidirectional triode thyristor 1699 is cut-off, and high frequency ac signal mainly transmits via external circuit or circuit for detecting 1690a.
Therefore, ballast circuit for detecting 1690 may determine that the high frequency ac signal whether signal of input is provided by electric ballast, if then making high frequency ac signal flow through external circuit or circuit for detecting 1690a；If otherwise bypass external circuit or circuit for detecting 1690a.
It should be noted that electric capacity 1698 can replace with the electric capacity in external circuit, such as: at least one electric capacity of end points change-over circuit embodiment shown in Figure 26 A to Figure 26 C, circuit for detecting 1690a then omits electric capacity 1698, thus graphic in be represented by dotted lines.
Refer to Figure 37 E, for the circuit diagram of the ballast circuit for detecting according to the present invention the second preferred embodiment.Ballast circuit for detecting 1790 comprises circuit for detecting 1790a and switching circuit 1790b.Switching circuit 1790b is coupled between the first switch terminal 1591 and the second switch terminal 1592.Circuit for detecting 1790a is coupled between sense terminal 1593 and 1594.Circuit for detecting 1790a comprises the inductance 1791 and 1792 of mutual inductance, electric capacity 1793 and 1796, resistance 1794 and diode 1797.Switching circuit 1790b comprises switching switch 1799.At the present embodiment, switching switch 1799 be p-type vague and general formula metal-oxide half field effect transistor (P-type Depletion Mode MOSFET), when its gate voltage is higher than a critical voltage for cut-off, less than during this critical voltage for turning on.
Inductance 1792 is coupled between sense terminal 1593 and 1594, with according to flowing through the signal mutual inductance of sense terminal 1593 and 1594 to inductance 1791, makes inductance 1791 produce detecting voltage.The level of detecting voltage uprises along with the frequency height of signal, step-down.
When signal is high-frequency signal, the induction reactance of inductance 1792 is at a relatively high, and mutual inductance produces at a relatively high detecting voltage to inductance 1791.When signal is low frequency signal or direct current signal, the induction reactance of inductance 1792 is at a fairly low, and mutual inductance produces at a fairly low detecting voltage to inductance 1791.One end ground connection of inductance 1791.Electric capacity 1793 and the resistance 1794 of series connection are in parallel with inductance 1791, with receive inductance 1791 generations detecting voltage, and carry out detecting voltage after generation filters after High frequency filter.Detect voltage after filtering to charge to produce control signal 1795 to electric capacity 1796 after diode 1797.Owing to diode 1797 provides electric capacity 1796 unidirectional charging, therefore the maximum of the detecting voltage that the level of control signal 1795 is inductance 1791.Electric capacity 1796 couples the control end of switching switch 1799.First end and second end of switching switch 1799 are respectively coupled to the first switch terminal 1591 and the second switch terminal 1592.
When the signal that sense terminal 1593 and 1594 receives is low-frequency ac signal or direct current signal, produced by electric capacity 1796, control signal 1795 makes switching switch 1799 conducting less than the critical voltage of switching switch 1799.Now, it is short circuit between the first switch terminal 1591 and the second switch terminal 1592, and has bypassed the external circuit that switching circuit 1790b is in parallel, such as: at least one electric capacity etc. in end points change-over circuit embodiment shown in Figure 26 A to Figure 26 C.
When the signal that sense terminal 1593 and 1594 receives is high frequency ac signal, produced by electric capacity 1796, control signal 1795 makes switching switch 1799 cut-off higher than the critical voltage of switching switch 1799.Now, high frequency ac signal mainly transmits via external circuit.
Therefore, ballast circuit for detecting 1790 may determine that the high frequency ac signal whether signal of input is provided by electric ballast, if then making high frequency ac signal flow through external circuit；If otherwise bypassing external circuit.
Next explanation LED adds ballast circuit for detecting, the conducting (bypass) of its switching circuit and the operation ending (not bypassing).For example, the first switch terminal 1591 and the second switch terminal 1592 couple the electric capacity connected with LED, i.e. drive the signal of LED straight lamp also can flow through this electric capacity.This electric capacity can be arranged on the inside of LED straight lamp and connects with internal circuit or be connected on outside LED straight lamp.The most referring also to Figure 24 A, when lamp tube drive circuit 505 not in the presence of, alternating current power supply 508 provide low pressure, low-frequency ac drive signal as external drive signal to drive LED straight lamp 500.Now, the switching circuit conducting of ballast circuit for detecting, make the alternating current drive signal of alternating current power supply 508 directly drive the internal circuit of LED straight lamp.In the presence of lamp tube drive circuit 505, lamp tube drive circuit 505 produces high pressure, high frequency ac signal to drive LED straight lamp 500.Now, the switching circuit of ballast circuit for detecting is ended, and this electric capacity is connected with the equivalent capacity within LED straight lamp, thus reaches the effect of capacitance partial pressure.Thereby, the voltage being applied to LED straight lamp internal circuit relatively low (such as: fall in the range of 100-277V) can be made to avoid internal circuit to damage because of high pressure.Or, first switch terminal 1591 and the second switch terminal 1592 couple the electric capacity in end points change-over circuit embodiment shown in Figure 26 A to Figure 26 C, the signal flowing through half-wave junction point 819 also simultaneously flows through this electric capacity, for example, the electric capacity 642 of Figure 26 A, the electric capacity 842 of Figure 26 C.When lamp tube drive circuit 505 produces high pressure, high frequency ac signal input, switching circuit is ended, is made electric capacity can reach dividing potential drop effect；When the low-frequency ac signal of civil power or the direct current signal of battery input, switching circuit turns on to bypass electric capacity.
It should be noted that, switching circuit can comprise multiple changeover module, to provide plural switch terminal to be connected in parallel the electric capacity of multiple parallel connection (such as: the electric capacity 645 and 646 of Figure 26 A, the electric capacity 643 of Figure 26 A, 645 and 646, the electric capacity 743 and 744 and/or 745 and 746 of Figure 26 B, the electric capacity 843 and 844 of Figure 26 C, the electric capacity 845 and 846 of Figure 26 C, the electric capacity 842 of Figure 26 C, 843 and 844, the electric capacity 842 of Figure 26 C, 845 and 846, the electric capacity 842 of Figure 26 C, 843, 844, 845 and 846), actually reach the effect of multiple electric capacity bypass equivalence connected with LED straight lamp.
It addition, also illustrate at this how ballast circuit for detecting of the present invention is used in combination with the mode switching circuit shown in Figure 32 A to Figure 32 I.Switching circuit in ballast circuit for detecting switching circuit in mode replaces.Circuit for detecting in ballast circuit for detecting be coupled to input first pin the 501, second pin the 502, the 3rd pin 503 and the 4th pin 504 one of them, be input to the signal of LED via first pin the 501, second pin the 502, the 3rd pin 503 and the 4th pin 504 with detecting.Circuit for detecting produces control signal according to the frequency of signal, and switching circuit is first mode or the second pattern for controlling the mode.
For example, when signal be high-frequency signal be higher than setting pattern switching frequency time, such as: the high-frequency signal provided by lamp tube drive circuit 505, the control signal of circuit for detecting will make mode switching circuit be the second pattern, so that described filtered signal is directly inputted described LED module；When signal is low frequency or direct current signal is less than setting pattern switching frequency, such as: low frequency that civil power or battery are provided or direct current signal, the control signal of circuit for detecting will make mode switching circuit be first mode, so that described filtered signal is directly inputted described drive circuit.
Refer to Figure 38 A, for the application circuit block schematic diagram of the power supply module of the LED straight lamp according to the present invention the 18th preferred embodiment.Compared to Figure 35 A illustrated embodiment, the LED straight lamp of the present embodiment comprises the first rectification circuit 510 and the second rectification circuit 540, filter circuit 520, LED drive module 530 and two filament artificial circuits 1560, and more increases auxiliary power module 2510.Auxiliary power module 2510 is coupled between the first filtering output end 521 and the second filtering output end 522.Auxiliary power module 2510 detects the filtered signal on the first filtering output end 521 and the second filtering output end 522, and decides whether to provide auxiliary power to the first filtering output end 521 and the second filtering output end 522 according to detecting result.When filtered signal stops providing or during exchange level deficiency, and i.e. when the driving voltage of LED module is less than a boost voltage, auxiliary power module 2510 provides auxiliary power, makes the LED drive module 530 can be with continuous illumination.Boost voltage determines according to an accessory power supply voltage of auxiliary power module.Two filament artificial circuits 1560, for omitting, are represented by dotted lines in the drawings.
Refer to Figure 38 B, for the application circuit block schematic diagram of the power supply module of the LED straight lamp according to the present invention the 19th preferred embodiment.Compared to Figure 38 A illustrated embodiment, the LED straight lamp of the present embodiment comprises the first rectification circuit 510 and the second rectification circuit 540, filter circuit 520, LED drive module 530, two filament artificial circuit 1560 and auxiliary power module 2510, and LED drive module 530 further includes drive circuit 1530 and LED module 630.Auxiliary power module 2510 couples between the first drive output 1521 and the second drive output 1522.Auxiliary power module 2510 detects the first drive output 1521 and driving signal of the second drive output 1522, and decides whether to provide auxiliary power to the first drive output 1521 and the second drive output 1522 according to detecting result.Thering is provided when driving signal to stop or during exchange level deficiency, auxiliary power module 2510 provides auxiliary power, makes the LED module 630 can be with continuous illumination.Two filament artificial circuits 1560, for omitting, are represented by dotted lines in the drawings.
Refer to Figure 38 C, for the circuit diagram of the auxiliary power module according to present pre-ferred embodiments.Auxiliary power module 2610 comprises energy-storage units 2613 and voltage detection circuit 2614.Auxiliary power module 2610 also has accessory power supply anode 2611 and accessory power supply negative terminal 2612 to be respectively coupled to the first filtering output end 521 and the second filtering output end 522 or the first drive output 1521 and the second drive output 1522.Voltage detection circuit 2614 detects the level of signal on accessory power supply anode 2611 and accessory power supply negative terminal 2612, to decide whether outwards to discharge the electric power of energy-storage units 2613 through accessory power supply anode 2611 and accessory power supply negative terminal 2612.
In the present embodiment, energy-storage units 2613 is battery or super capacitor.Energy-storage units 2613 more, when the level of accessory power supply anode 2611 and the signal of accessory power supply negative terminal 2612 is higher than the voltage of energy-storage units 2613, is charged by voltage detection circuit 2614 with the signal on accessory power supply anode 2611 and accessory power supply negative terminal 2612.When the signal level of accessory power supply anode 2611 and accessory power supply negative terminal 2612 is less than the voltage of energy-storage units 2613, energy-storage units 2613 through accessory power supply anode 2611 and accessory power supply negative terminal 2612 to external discharge.
Voltage detection circuit 2614 comprises diode 2615, bipolar junction transistors 2616 and resistance 2617.The positive pole of diode 2615 couples the positive pole of energy-storage units 2613, and negative pole couples accessory power supply anode 2611.The negative pole of energy-storage units 2613 couples accessory power supply negative terminal 2612.The collector of bipolar junction transistors 2616 couples accessory power supply anode 2611, and emitter-base bandgap grading couples the positive pole of energy-storage units 2613.Resistance 2617 one end couples accessory power supply anode 2611, and the other end couples the base stage of bipolar junction transistors 2616.Resistance 2617, when the collector of bipolar junction transistors 2616 is higher than one conducting voltage of emitter-base bandgap grading, makes bipolar junction transistors 2616 turn on.When the power supply driving LED straight lamp is normal, energy-storage units 2613 is charged by filtered signal through the bipolar junction transistors 2616 of the first filtering output end 521 with the second filtering output end 522 and conducting, or drive signal through the bipolar junction transistors 2616 of the first drive output 1521 with the second drive output 1522 and conducting, energy-storage units 2613 to be charged, till the difference of the collector-shooting of bipolar junction transistors 2616 equals to or less than conducting voltage.When filtered signal or driving signal stop offer or level declines suddenly, energy-storage units 2613 provides electrical power to LED drive module 530 or LED module 630 to remain luminous by diode 2615.
It should be noted that the ceiling voltage stored when charging of energy-storage units 2613 is by least below the conducting voltage putting on accessory power supply anode 2611 and one bipolar junction transistors 2616 of voltage of accessory power supply negative terminal 2612.The voltage exported by accessory power supply anode 2611 and accessory power supply negative terminal 2612 when energy-storage units 2613 discharges is less than the threshold voltage of one diode 2615 of voltage of energy-storage units 2613.Therefore, when auxiliary power module starts to power, the voltage provided is by relatively low (approximating the summation of the threshold voltage of diode 2615 and the conducting voltage of bipolar junction transistors 2616).In the embodiment shown in Figure 38 B, when auxiliary power module is powered, voltage reduction can make the brightness of LED module 630 be decreased obviously.So, when auxiliary power module is applied to emergency lighting system or normal bright illuminator, user is it is known that key lighting power supply, such as: civil power, abnormal, and can carry out the precautionary measures of necessity.
Refer to Figure 39 A, for the application circuit block schematic diagram of the power supply module of the LED straight lamp according to the present invention the 20th preferred embodiment.Compared to Figure 24 B illustrated embodiment, the LED straight lamp of the present embodiment comprises the first rectification circuit 510 and the second rectification circuit 540, filter circuit 520, LED drive module 530, and more increases detecting module 2520.Detecting module 2520 couples the first rectification circuit 510 (and/or second rectification circuit 540) through the first sense terminal 2521, and couples filter circuit 520 through the second sense terminal 2522.Detecting module 2520 detecting flows through the first sense terminal 2521 and signal of the second sense terminal 2522, and decides whether that ending external drive signal flows through LED straight lamp according to detecting result.When LED straight lamp is the most formally installed on lamp socket, detecting module 2520 can be detected less current signal and judge that signal flows through too high impedance, and now detecting module 2520 cut-off makes LED straight lamp stop operation.If it is not, detecting module 2520 judges that LED straight lamp is correctly installed on lamp socket, detecting module 2520 maintains conducting to make LED straight lamp normal operating.I.e., when the electric current flowing through described first sense terminal and described second sense terminal is greater than or equal to a set-mounted electric current (or a current value), detecting module judges that LED straight lamp is correctly installed on lamp socket and turns on, and makes LED straight lamp operate in a conducting state；When the electric current flowing through described first sense terminal and described second sense terminal is less than described set-mounted electric current (or current value), detecting module judges that LED straight lamp is the most correctly installed on lamp socket to be ended, and makes LED straight lamp enter a not on-state.In other words, detecting module 2520 impedance based on detecting judges on or off, makes LED straight lamp operate in conducting or enter not on-state.Thereby, the problem that user can be avoided when LED straight lamp is the most correctly installed on lamp socket get an electric shock because of false touch LED straight lamp current-carrying part.
Refer to Figure 39 B, for the circuit diagram of the detecting module according to present pre-ferred embodiments.Detecting module comprises on-off circuit 2580, detection pulse (pulse) occurs module 2540 (in order to produce or the pulse for detection occurs), testing result latch cicuit 2560 and detection decision circuit 2570.Detection decision circuit 2570 (coupling end 2581 and on-off circuit 2580 through switch) couples the first sense terminal 2521 and couples the second sense terminal 2522, to detect the signal between the first sense terminal 2521 and the second sense terminal 2522.Detection decision circuit 2570 result end 2571 the most after testing couples testing result latch cicuit 2560, so that testing result signal result end 2571 after testing is sent to testing result latch cicuit 2560.Detection pulse generating module 2540 couples testing result latch cicuit 2560 by pulse signal output end 2541, and produces pulse signal to notify that testing result latch cicuit 2560 latches the point on opportunity of testing result.Testing result latch cicuit 2560 latches testing result according to testing result signal (or testing result signal and pulse signal), and result latches end 2561 and couples on-off circuit 2580 after testing, with by testing result transmission or be reflected into on-off circuit 2580.On-off circuit 2580, according to testing result, determines to make on or off between the first sense terminal 2521 and the second sense terminal 2522.
Refer to Figure 39 C, for the circuit diagram of the detection pulse generating module according to present pre-ferred embodiments.Detection pulse generating module 2640 comprises electric capacity 2642 (or claiming the 3rd capacitor), 2645 (or claiming the first capacitor) and 2646 (or claiming the second capacitor), resistance 2643 (or claiming the 3rd resistor), 2647 (or claiming the first resistor) and 2648 (or claiming the second resistor), buffer (buffer) 2644 (or referred to as second buffer) and 2651 (or referred to as first buffers), reverser 2650, diode 2649 and or door (OR gate) 2652.In use or operation, electric capacity 2642 and resistance 2643 are series at a driving voltage and (are such as referred to as VCC, and be often a high level by ordering) and reference potential (at this with the current potential on ground as embodiment) between, its junction point couples the input of buffer 2644.Resistance 2647 is coupled to a driving voltage (can be described as VCC) and the input of reverser 2650.Resistance 2648 is coupled between the input of buffer 2651 and a reference potential (at this with the current potential on ground as embodiment).The positive ending grounding of diode, negative terminal is also coupled to the input of buffer 2651.One end of electric capacity 2645 and one end of 2646 couple the outfan of buffer 2644 jointly, the input of another termination reverser 2650 of electric capacity 2645, electric capacity 2646 the other end then couple the input of buffer 2651.The outfan of the reverser 2650 and outfan of buffer 2651 couples or the input of door 2652.It is noted that in this description of this case, current potential it " high level " and " low level " are relative in circuit for another current potential or certain reference potential, and again can be respectively as " logic high " and " logic low ".
When one end lamp holder of LED straight lamp inserts lamp socket, the both-end lamp holder of other end lamp holder human body in electrical contact or LED straight lamp all inserts lamp socket, LED straight lamp is energized.Now, detecting module enters detection-phase.Electric capacity 2642 be height (equal to driving voltage VCC) with the junction point level of resistance 2643 at the beginning, in after be gradually reduced in time, be finally down to zero.The input coupling capacitance 2642 of buffer 2644 and the junction point of resistance 2643, the most i.e. export high level signal, and when the junction point level of electric capacity 2642 with resistance 2643 is down to low logic decision level, change into low level signal.It is, buffer 2644 produces an input pulse signal, the most persistently maintain low level (stopping exporting described input pulse signal).The pulse width of described input pulse signal is equal to (initial setting) time cycle, and the described time cycle is determined by the capacitance of electric capacity 2642 and the resistance of resistance 2643.
Then explanation buffer 2644 produces the operation setting the time cycle of pulse signal.Owing to one end of electric capacity 2645 with resistance 2647 is equal to driving voltage VCC, therefore electric capacity 2645 is also high level with the connection end of resistance 2647.It addition, one end ground connection of resistance 2648, one end of electric capacity 2646 receives the pulse signal of buffer 2644.So the connection end of electric capacity 2646 and resistance 2648 is at high level at the beginning, the most gradually on be down to zero (storing the voltage equal or close to driving voltage VCC with time electric capacity).Therefore, reverser 2650 output low level signal, buffer 2651 then exports high level signal, and makes or door 2652 exports high level signal (the first pulse signal) in pulse signal output end 2541.Now, testing result latch cicuit 2560 latches testing result for the first time according to testing result signal and pulse signal.When the level connecting end of electric capacity 2646 with resistance 2648 is down to low logic decision level, buffer 2651 transfers output low level signal to, and makes or door 2652 is in pulse signal output end 2541 output low level signal (stopping output the first pulse signal).Or the pulsewidth of pulse signal that door 2652 is exported is determined by the capacitance of electric capacity 2646 and the resistance of resistance 2648.
Then it is illustrated in buffer 2644 and stops the operation after output pulse signal, i.e. enter the operation of operational phase.Owing to electric capacity 2646 stores the voltage close to driving voltage VCC, therefore the output in buffer 2644 is transferred to low level moment by high level, capacitor fast charging less than zero, and can be made the level of connection end retract zero via diode 2649 with the level connecting end of resistance 2648 by electric capacity 2646.Therefore, buffer 2651 still maintains output low level signal.
On the other hand, the output in buffer 2644 is transferred to low level moment by high level, and the level of one end of electric capacity 2645 is reduced by zero by driving voltage VCC moment, and making electric capacity 2645 is low level with the connection end of resistance 2647.The output signal of reverser 2650 transfers high level to, and makes or door output high level (the second pulse signal).Now, testing result latch cicuit 2560 latches testing result according to testing result signal and pulse signal second time.Then, electric capacity 2645 is charged by resistance 2647, makes electric capacity 2645 be gradually increasing in time with the level connecting end of resistance 2647 and arrive equal to driving voltage VCC.When the level connecting end holding 2645 and resistance 2647 rises paramount logical judgment level, reverser 2650 output low level once again, and make or door 2652 stopping output the second pulse signal.The pulsewidth of the second pulse signal is determined by the resistance of the capacitance of electric capacity 2645 with resistance 2647.
As mentioned above, detection pulse generating module 2640 can produce pulse signal the-the first pulse signal and second pulse signal of two high level in detection-phase, exported by pulse signal output end 2541, and between the first pulse signal and the second pulse signal, it is spaced a setting time interval, set time interval and mainly determined by the capacitance of electric capacity 2642 and the resistance of resistance 2643
And after detection-phase, entering the operational phase, detection pulse generating module 2640 no longer produces pulse signal, and maintains pulse signal output end 2541 for low level.Refer to Figure 39 D, for the circuit diagram of the detection decision circuit according to present pre-ferred embodiments.Detection decision circuit 2670 comprises comparator 2671 and resistance 2672.The end of oppisite phase of comparator 2671 receives reference level signal Vref, and non-oppisite phase end is through resistance 2672 ground connection and couples switch simultaneously and couples end 2581.The most referring also to Figure 39 A, by the first sense terminal 2521 flow into on-off circuit 2580 signal can via switch couple end 2581 output and flow through resistance 2672.When the electric current flowing through resistance 2672 is excessive (i.e., greater than or equal to set-mounted electric current, such as: current value 2A) making level on resistance 2672 higher than (may correspond to described two lamp holders and be correctly inserted into described lamp socket) during the level of reference level signal Vref, comparator 2671 produces the testing result signal of high level and is exported by testing result end 2571.Such as, when LED straight lamp is correctly installed on lamp socket, comparator 2671 can export the testing result signal of high level in testing result end 2571.When the electric current deficiency flowing through resistance 2672 makes level on resistance 2672 higher than the level of reference level signal Vref (may correspond to only one of which lamp holder and be correctly inserted into described lamp socket), comparator 2671 produces low level testing result signal and is exported by testing result end 2571.Such as, when, when LED straight lamp is the most correctly installed on lamp socket, or one end is installed on lamp socket and the other end is when human body grounding, electric current is by too small and make comparator 2671 in the testing result signal of testing result end 2571 output low level.
Refer to Figure 39 E, for the circuit diagram of the testing result latch cicuit according to present pre-ferred embodiments.Testing result latch cicuit 2660 comprises D flip-flop (D Flip-flop) 2661, resistance 2662 and or door 2663.The clock input (CLK) of D flip-flop 2661 couples testing result end 2571, and input D couples driving voltage VCC.When the testing result signal of testing result end 2571 output low level, D flip-flop 2661 is in outfan Q output low level signal；When testing result end 2571 exports the testing result signal of high level, D flip-flop 2661 exports high level signal in outfan Q.Resistance 2662 is coupled between outfan Q and the reference potential (current potential such as) of D flip-flop 2661.When or the first pulse signal of door 2663 return pulse signal outfan 2541 output or the second pulse signal, or D flip-flop 2661 is when the high level signal that outfan Q export, exports the testing result latch signal of high level in testing result latch end 2561.Owing to detection pulse generating module 2640 is only when detection-phase exports the first pulse signal or the second pulse signal, leading or door 2663 exports high level testing result latch signal, and to be dominated testing result latch signal by D flip-flop 2661 be high level or low level remaining time (operational phase after comprising detection-phase).Therefore, when the testing result signal of high level did not occurred in testing result end 2571, D flip-flop 2661 maintains low level signal in outfan Q, and makes testing result latch end 2561 and also maintain low level testing result latch signal in the operational phase.Otherwise, when testing result end 2571 was once there is the testing result signal of high level, and D flip-flop 2661 can latch and maintain high level signal in outfan Q.So, testing result latches the testing result latch signal also maintaining high level when end 2561 enters the operational phase.
Refer to Figure 39 F, for the circuit diagram of the on-off circuit according to present pre-ferred embodiments.On-off circuit 2680 can comprise a transistor (transistor), and such as one bipolar junction transistors 2681 is as a power transistor (power transistor).Power transistor can process high electric current and power, is particularly used in on-off circuit.The collector of bipolar junction transistors 2681 couples the first sense terminal 2521, and base stage couples testing result and latches end 2561, and emitter-base bandgap grading switch couples end 2581.When detecting pulse generating module 2640 and producing the first pulse signal or the second pulse signal, bipolar junction transistors 2681, by of short duration conducting, makes detection decision circuit 2670 detect, to determine that testing result latch signal is as high level or low level.When testing result latch cicuit 2660 latches, in testing result, the testing result latch signal that end 2561 exports high level, conducting is made to turn between the first sense terminal 2521 and the second sense terminal 2522 by bipolar junction transistors 2681.When testing result latch cicuit 2660 latches the testing result latch signal of end 2561 output low level in testing result, cut-off is made to end between the first sense terminal 2521 and the second sense terminal 2522 by bipolar junction transistors 2681.
Owing to external drive signal is AC signal, when detecting in order to avoid detection decision circuit 2670, the level of external drive signal just causes detecting mistake at zero crossings.Therefore, detection pulse generating module 2640 produces the first pulse signal and the second pulse signal so that detection decision circuit 2670 detects twice, and during to avoid single to detect, the level of external drive signal is just in the problem of zero crossings.Preferably, the generation time difference of the first pulse signal and the second pulse signal is not the integer multiple of the cycle half of described external drive signal, i.e. also the integer multiple of 180 degree of phase contrasts of external drive signal described in non-corresponding.So, when the first pulse signal and one of them generation of the second pulse signal, if unfortunate external drive signal is at zero crossings, another can avoid external drive signal also at zero crossings when producing.
Above-mentioned first pulse signal and the generation time difference of the second pulse signal, i.e. setting time interval can be expressed as follows with formula:
Set time interval=(X+Y) (T/2)
Wherein, T is the cycle of external drive signal, and X is the integer more than or equal to zero, 0 < Y < 1.
Y is preferably in the range of between 0.05-0.95, between more preferably 0.15-0.85.
Furthermore, when entering detection-phase in order to avoid detecting module, the lowest meeting of level of driving voltage VCC causes the circuit logic misjudgment of detecting module to begin to ramp up.Generation at the first pulse signal may be set in driving voltage VCC and arrives or produce higher than during a predetermined level, make driving voltage VCC after reaching enough level, detect decision circuit 2670 just to carry out, to avoid the circuit logic misjudgment of the caused detecting module of level deficiency.
Understand according to the above description, when other end lamp holder is suspension joint or human body in electrical contact when one end lamp holder of LED straight lamp inserts lamp socket, make the testing result signal of detection decision circuit output low level because impedance is big.Low level testing result signal is latched into low level testing result latch signal according to the pulse signal of detection pulse generating module by testing result latch cicuit, and also maintains testing result when the operational phase.So, on-off circuit can be made to maintain cut-off to avoid persistently being energized.Human electric shock so also can be avoided possible such that it is able to meet the requirement of safety.And when the two ends lamp holder of LED straight lamp is correctly inserted into lamp socket, make the testing result signal of detection decision circuit output high level because the impedance of the circuit of LED straight lamp own is little.The testing result signal of high level is latched into the testing result latch signal of high level according to the pulse signal of detection pulse generating module by testing result latch cicuit, and also maintains testing result when the operational phase.So, on-off circuit can be made to maintain conducting to be persistently energized, make the normal operating when the operational phase of LED straight lamp.
In other words, in certain embodiments, when when the lamp holder described lamp socket of insertion described in one end of described LED straight lamp, lamp holder described in the other end is suspension joint or human body in electrical contact, the described testing result signal of described detection decision circuit input low level is to described testing result latch cicuit, the most described detection pulse generating module exports a low level signal to described testing result latch cicuit, make a testing result latch signal of described testing result latch cicuit output low level so that described on-off circuit ends, the cut-off of wherein said on-off circuit makes to end between described first sense terminal and the second sense terminal, even if the most described LED straight lamp enters a not on-state.
And in certain embodiments, when described two lamp holders of described LED straight lamp are correctly inserted into described lamp socket, the described testing result signal of described detection decision circuit input high level is to described testing result latch cicuit, make a testing result latch signal of described testing result latch cicuit output high level so that described on-off circuit turns on, the conducting of wherein said on-off circuit makes to turn on, even if the most described LED straight lamp operates in a conducting state between described first sense terminal and the second sense terminal.
It should be noted that the pulsewidth of pulse signal that detection pulse generating module produces between 10us to 1ms, its effect, only when LED straight lamp energising moment, utilizes this pulse signal to make on-off circuit conducting of short duration time.So can produce a pulse current, flow through detection decision circuit and carry out detection judgement.It is the pulse of short time because of produce and turns on non-for a long time, Danger Electric shock risk can't be caused.Furthermore, testing result latch cicuit also maintains testing result when the operational phase, no longer changes the testing result of previously latch because circuit state change, and the problem avoided testing result to change and cause.And detecting module (i.e. on-off circuit, detection pulse generating module, testing result latch cicuit and detection decision circuit) is desirably integrated in chip, so can be embedded in circuit, circuit cost and the volume of detecting module can be saved.
Such as, in Power Management Design, the molectron of length circuit board has a long circuit board and a short circuit board, long circuit board and short circuit board are fitted each other and fixed through gluing mode, and short circuit board is positioned at long circuit board adjacent peripheral edges.There is on short circuit board power supply module, be monolithically fabricated power supply.
In power supply module design, described external drive signal can be low-frequency ac signal (such as: civil power is provided), high frequency ac signal (such as: electric ballast is provided) or direct current signal (such as: battery is provided or external driving power supply), and can input LED straight lamp with the driving framework of Double-End Source.At the driving framework of Double-End Source, can only use in the way of wherein one end is with as single ended power supply by support and receive external drive signal.
When direct current signal is as external drive signal, the power supply module of LED straight lamp can omit rectification circuit.
In the rectification circuit of power supply module designs, the first rectification unit in double rectification circuits and the second rectification unit pin with the two ends lamp holder being arranged in LED straight lamp respectively couples.Double rectification units are applicable to the driving framework of Double-End Source.And when being configured with at least one rectification unit, go for the drive environment of low-frequency ac signal, high frequency ac signal or direct current signal.
Double rectification units can be double half-wave rectification circuit, double-full-bridge rectifier circuit or half-wave rectifying circuit and the combination of full bridge rectifier each.
In the pin of LED straight lamp designs, can be each single pin of both-end (totally two pins), the framework of each pair of pin of both-end (totally four pins).Under the framework of each single pin of both-end, it is applicable to the rectification circuit design of single rectification circuit.Under the framework of each pair of pin of both-end, it is applicable to the rectification circuit design of double rectification circuit, and uses each arbitrary pin of both-end or arbitrary single-ended double pins to receive external drive signal.
In the filter circuit design of power supply module, can have Single Capacitance or π type filter circuit, to filter the radio-frequency component in rectified signal, and providing the direct current signal of low ripple is filtered signal.Filter circuit can also comprise LC filter circuit, so that characteristic frequency is presented high impedance, to meet the UL certification size of current specification to characteristic frequency.Furthermore, filter circuit more can comprise the filter unit being coupled between pin and rectification circuit, to reduce the electromagnetic interference that the circuit of LED is caused.When direct current signal is as external drive signal, the power supply module of LED straight lamp can omit filter circuit.
In the LED drive module of power supply module designs, can only comprise LED module or comprise LED module and drive circuit.Can also be in parallel with LED drive module by mu balanced circuit, to guarantee the voltage unlikely generation overvoltage in LED drive module.Mu balanced circuit can be voltage clamping circuit, such as: Zener diode, bi-directional voltage stabilizing pipe etc..When rectification circuit comprises condenser network, can a pin of each end of both-end be connected two-by-two with a pin of the other end electric capacity between, with carry out dividing potential drop effect with condenser network and as mu balanced circuit.
In the design only comprising LED module, when high frequency ac signal is as external drive signal, at least one rectification circuit comprises condenser network (i.e., comprise more than one electric capacity), connect with the full-bridge in rectification circuit or half-wave rectifying circuit, make condenser network be equivalent to impedance under high frequency ac signal with as current regulating circuit the electric current that regulates LED module.Thereby, when different electric ballasts is provided the high frequency ac signal of different voltage, the unlikely situation that stream occurred in the range of the electric current of LED module can be adjusted in predetermined current.Furthermore it is possible to extra increase release can circuit, in parallel with LED module, after external drive signal stops providing, filter circuit is carried out releasing energy by auxiliary, causes the situation of LED module flashing with the resonance reducing filter circuit or other circuit are caused.In comprising LED module and drive circuit, drive circuit can be DC-DC voltage up converting circuit, DC-DC decompression converting circuit or DC-DC buck change-over circuit.Drive circuit system is in order to set current value by the current stabilization of LED module, it is also possible to setting current value is heightened or turned down to high or low next corresponding according to external drive signal.Furthermore it is possible to additionally increase mode selector switch is between LED module and drive circuit, electric current is made to be directly inputted LED module by filter circuit or input LED module after overdrive circuit.
Furthermore it is possible to additionally increase protection circuit to protect LED module.Protection circuit can detect the electric current of LED module and/or voltage carrys out corresponding startup and corresponding crosses stream or overvoltage protection.
In the ballast circuit for detecting of power supply module designs, ballast circuit for detecting is in parallel with the electric capacity connected with LED drive module in equivalence, and determines that external drive signal flows through electric capacity or flows through ballast circuit for detecting (i.e. bypassing electric capacity) according to the frequency of external drive signal.Above-mentioned electric capacity can be the condenser network of rectification circuit.
In the filament artificial circuit of power supply module designs, can be single shunt capacitance and resistance or two-in-parallel electric capacity and resistance or negative temperature parameter circuit.Filament artificial circuit is applicable to program preheating start-up type electric ballast, program preheating start-up type electric ballast can be avoided to judge the problem that filament is abnormal, improve the compatibility to program preheating start-up type electric ballast.And filament artificial circuit has little influence on the compatibility of other electric ballasts such as instantaneous starting type (Instant Start) electric ballast, quick-starting direct (Rapid Start) electric ballast.
In the ballast compatible circuit of power supply module designs, can connect with rectification circuit or in parallel with filter circuit and LED drive module.In the design connected with rectification circuit, the original state of ballast compatible circuit is cut-off, and turns on after setting time delay.In the design in parallel with filter circuit and LED drive module, the original state of ballast compatible circuit is conducting, and ends after setting time delay.Ballast compatible circuit can make instantaneous starting type electric ballast to start smoothly in initial start stage, and improves the compatibility to instantaneous starting type electric ballast.And ballast compatible circuit has little influence on the compatibility of other electric ballasts such as preheating start-up type electric ballast, quick-starting direct electric ballast.
In the auxiliary power module of power supply module designs, energy-storage units can be battery or super capacitor, in parallel with LED module.Auxiliary power module is suitable for inclusion in the LED drive module design of drive circuit.
In the LED module of power supply module designs, LED module can comprise the multi-string LED assembly being connected in parallel to each other (i.e., single LED chip, or the LED group of multiple LED modules with different colors chip composition) string, the LED component in each LED component string can be connected to each other and form netted connection.
It is to say, features described above can be made arbitrary permutation and combination, and for the improvement of LED straight lamp.
As shown in figure 19, in one embodiment, circuit board group component 25 eliminates the situation that in previous embodiment, the mode of lamp plate 2 and power supply 5 welding is fixed, but first long circuit board 251 and short circuit board 253 gluing is fixed, then is electrically connected by the line layer 2a of power supply module 250 and lamp plate 2.Additionally, lamp plate 2 is not limited in one layer or double layer circuit plate as above-mentioned, can be the most also to comprise another sandwich circuit layer 2c.Light source 202 is located at line layer 2a, by line layer 2a and power supply 5 electrical communication.As shown in figure 20, in another embodiment, circuit board group component 25 has long circuit board 251 and a short circuit board 253, long circuit board 251 can be bendable circuit soft board or the flexible base board of above-mentioned lamp plate 2, lamp plate 2 includes an a line layer 2a and dielectric layer 2b, first by affixed with connecting method to dielectric layer 2b and short circuit board 253, afterwards, then line layer 2a is attached on dielectric layer 2b and extends on short circuit board 253.Various embodiments above, all without departing from the range of application of circuit board group component 25 of the present invention.
In the various embodiments described above, the length of short circuit board 253 is about 15 millimeters to 40 millimeters, preferably 19 millimeters to 36 millimeters, and the length of long circuit board 251 can be 800 millimeters to 2800 millimeters, preferably 1200 millimeters to 2400 millimeters.The ratio of short circuit board 253 and long circuit board 251 can be 1:20 to 1:200.
In addition, in the foregoing embodiments, when lamp plate 2 and power supply 5 are to fix through welding manner, the end of lamp plate 2 is not secured on the inner peripheral surface of fluorescent tube 1, power supply 5 cannot be supported by the fixing of safety, in other embodiments, if power supply 5 must be fixed in the lamp holder of fluorescent tube 1 end region separately, then lamp holder can be relatively long and have compressed the effective light-emitting area of fluorescent tube 1.
Refer to Figure 22, in one embodiment, the lamp plate used is the rigid circuit board of aluminum 22, because its end can be relatively fixed in the end region of fluorescent tube 1, power supply 5 then uses the mode being perpendicular to rigid circuit board 22 to be weldingly fixed on above rigid circuit board 22 end, one enforcement being easy to welding procedure, two carry out lamp holder 3 need not to have the space that be enough to carry the total length of power supply 5 and can shorten length, so can increase the effective light-emitting area of fluorescent tube.Additionally, in the foregoing embodiments, on power supply 5 in addition to being equiped with power supply module, in addition it is also necessary to welding plain conductor forms electrical connection with the conductive pin 301 of lamp holder 3 separately.In the present embodiment, can be used directly on power supply 5, the conductive pin 53 as power supply module is electrically connected with lamp holder 3, is not required to additionally weld other wire again, is more beneficial for the simplification of processing procedure.
In embodiments of the present invention, being additionally provided with and prevent the protection of leakage current from switching in lamp holder, protection switch is attached between conductive pin 301 and power supply.Only LED daylight lamp correct when being installed to lamp socket, protection switch just can be triggered (power supply with conductive pin 301 be electrically connected).So LED daylight lamp, before being installed to correctly be installed in light fixture, lamp holder will not be energized, thus provides suitable electrical shock protection safety for installation personnel.Installation personnel this daylight lamp one end when installing LED daylight lamp can be avoided to be inserted into lamp socket, there is the danger got an electric shock in hands imprudence when encountering the other end.In another embodiment of the invention, for transversal switch, (when only LED fluorescent lamp tube is by correct installation, this transversal switch (liquid flow to predetermined position) triggers protection switch.LED daylight lamp could normally work.
It is also preferred that the left above-mentioned protection switch is provided with 2, it is respectively provided in the lamp holder of both sides.May also set up one, when arranging one, can mark be set on the lamp holder that protection switch-side is set, remind installation personnel, the side not indicated first is installed during installation.
As shown in figure 41: for the structural representation of one embodiment of the invention LED daylight lamp, LED daylight lamp 100, comprise: fluorescent tube 1, lamp holder 3 is (in order to embody the burner design of the present invention program, amplify the ratio of lamp holder and fluorescent tube, lamp holder length about 9.0mm 70mm in reality, fluorescent tube 254mm 2000mm (i.e. 1in. 8in.)).Lamp holder 3 is arranged on the two ends of fluorescent tube 1, conductive pin 301, retractor device 332 are set on lamp holder 3, microswitch 334 and lamp circuit 5 module it is additionally provided with in lamp holder 3, when what LED daylight lamp 100 was correct is installed to lamp socket (not shown), microswitch 334 is triggered by retractor device 332, realize the electrical connection of power supply 5 and civil power, and then light the LED component (not shown) in LED daylight lamp 100.
As the deformation of microswitch in such scheme, as shown in figure 42, input 3341 is electrically connected to hollow conductive pin (not shown), outfan 3343 is electrically connected to power supply 5 (not shown), bidirectional thyristor TR it is provided with between input 3341 and outfan 3343, resistance R0 is connected with 1 end of microswitch 334, and another 2 ends are electrically connected to the triggering end of bidirectional thyristor TR.Value 1K ohm of resistance R0 is to 10K ohm.It is also preferred that the left resistance R0 chooses the resistance of 2K ohms.The electric current flowing through this switch is dropped to about 0.1A (so choosing of switch has bigger scope, also can further reduce cost) by the 10A before deforming.
Protection switch comprises controllable silicon 3347, bidirectional triode thyristor 3345 and microswitch 334, the arbitrary microswitch during wherein microswitch 334 can be those embodiments aforementioned.As it can be seen, the input 3341 of protection switch is electrically connected to the arbitrary hollow conductive pin (not shown) of LED straight lamp, outfan 3343 is electrically connected to lamp circuit module.The two ends of bidirectional triode thyristor 3345 are respectively coupled to input 3341 and outfan 3343.Controllable silicon 3347 is connected with microswitch 334.The controllable silicon 3347 of series connection couples the control end of bidirectional triode thyristor 3345 then with one end of microswitch 334, and the other end couples input 3341.
When microswitch 334 resets, the control end of bidirectional triode thyristor 3345 is not connected with input 3341.Now, bidirectional triode thyristor 3345 is cut-off, makes hollow conductive pin 301 not be electrically connected with power supply 5.When microswitch 334 is triggered and electrically conducts, input 3341 transmits electric current to the control end of bidirectional triode thyristor 3345 through controllable silicon 3347 and the microswitch 334 of series connection, makes bidirectional triode thyristor 3345 be triggered conducting.Now, hollow conductive pin 301 is electrically connected with power supply 5, makes LED straight lamp normal operation.
The embodiment of the aforementioned protection switch only having microswitch 334, in the moment that microswitch 334 triggers, has great immediate current, such as: the immediate current of more than 10A, flows through microswitch 334 and arrive power supply 5 and LED component.This not only causes microswitch 334 to need strict resistance to stream to require but also its volume is the biggest；Furthermore, immediate current is likely to damage power supply 5 and LED component.The immediate current of the present embodiment is suppressed by controllable silicon 3347, therefore can reduce the resistance to stream requirement of microswitch 334, reduces the volume of microswitch 334 simultaneously and reduces cost.In one embodiment, the resistance of resistance R0 is preferably 1K ohm to 10K ohm；It is more preferably 2K ohm.By such design, flow through the electric current of microswitch by dropping to about 0.1A.
The structure of the most detailed description lamp holder with protected switch.
As shown in fig. 40, for the structural representation of holder structure of the embodiment of the present invention.Lamp holder 3, comprises: lamp holder body 300, power supply 5, has and is arranged at the conductive pin 301 on lamp holder body 300 top, can stretch out the retractor device 332 of lamp holder, microswitch 334 along one end of conductive pin 301 direction (i.e. LED daylight lamp is axial) movement；
Retractor device 332 is provided with stop bit parts 337, controls, by these stop bit parts 337, the amplitude (i.e. retractor device 332 stretches out the amplitude of lamp holder body) that retractor device 332 moves；Retractor device 332 is provided with 2 expansion links 335, and its one end is connected to retractor device 332, and the other end is interspersed on fixed part 336, and wherein an expansion link 335 is near microswitch 334；Spring 333 it is cased with on expansion link 335.This lamp holder 3 correct when being installed to lamp socket, conductive pin 301 is inserted into lamp socket (not shown)；Because being extruded by lamp socket, retractor device 332 moves along being inserted into lamp socket rightabout with conductive pin 301, and one triggers microswitch 334 near the expansion link 335 of microswitch 334, it is achieved the connection of admittance acusector 301 and power supply 5.
Company's both sides lamp holder of the LED daylight lamp of the embodiment of the present invention can be designed with this microswitch.Reduction installation personnel is when installing LED daylight lamp so greatly, the injury that due to leakage current brings.Also the requirement of Safety Approval can be met.
In the case of LED daylight lamp is not mounted to lamp socket (or LED daylight lamp is when lamp socket takes out), due to spring tension, retractor device 332 is to the outer side shifting of lamp holder body.Microswitch 334 resets, it is achieved power supply 5 disconnects with conductive pin 301.
As shown in Figure 40 B, for the structural representation of a holder structure of another embodiment of the present invention.Lamp holder 3, comprises:
Lamp holder body 300, power supply (not shown), also have and be arranged at the conductive pin 301a on lamp holder top, the retractor device 332 of lamp holder, microswitch 334 can be stretched out along one end of conductive pin 301a direction (i.e. LED daylight lamp is axial) movement；Retractor device 332 is provided with stop bit parts 337, controls, by these stop bit parts 337, the amplitude (i.e. retractor device 332 stretches out the amplitude of lamp holder body) that retractor device 332 moves；The fixing point fixing 72 springs 333 it is additionally provided with on stop bit parts 337.Spring 333 one end is fixed on this fixing point, and the other end is fixed on fixed part 336.This lamp holder 3 correct when being installed to lamp socket, conductive pin 301a is inserted into lamp socket (not shown)；Because being extruded by lamp socket, retractor device 332 moves along being inserted into lamp socket rightabout with conductive pin 301a, microswitch 334 is triggered, it is achieved admittance acusector 301 and the connection of power supply (not shown) by arranging the projection 338 towards fixed part 336 on retractor device 332.
Company's both sides lamp holder of the LED daylight lamp of the embodiment of the present invention can be designed with this microswitch.In such scheme, what retractor device 332 was interrupted is socketed in around conductive pin 301a.
In the case of LED daylight lamp is not mounted to lamp socket (or LED daylight lamp is when lamp socket takes out), due to spring tension, retractor device 332 is to the outer side shifting of lamp holder.Microswitch 334 resets, it is achieved power supply (not shown) disconnects with conductive pin 301a.
As shown in figure 40 c, for the structural representation of a holder structure of another embodiment of the present invention.Lamp holder 3, comprises:
Lamp holder body 300, power supply 5 (not shown), also have and be arranged at the conductive pin 301a on lamp holder top, the retractor device 332 of lamp holder, microswitch 334 can be stretched out along one end of conductive pin 301a direction (i.e. LED daylight lamp is axial) movement；Retractor device 332 is provided with stop bit parts 337, controls, by these stop bit parts 337, the amplitude (i.e. retractor device 332 stretches out the amplitude of lamp holder body) that retractor device 332 moves；Microswitch 334 is arranged on the inside (retractor device 332 stretches out the protruding interior of lamp holder) of retractor device 332, and microswitch 334 is clipped between the spring (spring 333a and spring 333b) of two different coefficient of elasticity.This lamp holder 3 correct when being installed to lamp socket, conductive pin 301a is inserted into lamp socket (not shown)；Because being extruded by lamp socket, retractor device 332 moves along being inserted into lamp socket rightabout with conductive pin 301a, because of the effect of the spring of two different coefficient of elasticity, triggers microswitch 334, it is achieved admittance acusector 301 and the connection of power supply (not shown).
Company's both sides lamp holder of the LED daylight lamp of the embodiment of the present invention can be designed with this microswitch.Reduction installation personnel is when installing LED daylight lamp so greatly, the injury that due to leakage current brings.Install because LED daylight lamp is the most correct, after microswitch action, just realize the connection of admittance acusector 301 and power supply (not shown).
In such scheme, spring 333b one end is connected to microswitch 334, and the other end is fixed on fixed part 336.Spring 333a and spring 333b is the most actionable when by minimum power.It is also preferred that the left spring 333a is by 0.5～1N；And spring 333b is the most actionable in the power of 3～4N.
In the case of LED daylight lamp is not mounted to lamp socket, due to the tension force of spring, microswitch 334 action, it is achieved power supply (not shown) disconnects with conductive pin 301a.
As shown in Figure 40 D, for the structural representation of a holder structure of another embodiment of the present invention.Lamp holder 3, comprises:
Lamp holder body 300, power supply (not shown), also have and be arranged at the conductive pin 301 on lamp holder body 300 top, can stretch out along one end of conductive pin 301 direction (i.e. LED daylight lamp is axial) movement that the retractor device 332,2 of lamp holder body is relative and spaced shell fragment 334a；Retractor device 332 is provided with stop bit parts, the amplitude (i.e. retractor device 332 stretches out the amplitude of lamp holder body) moved by this stop bit component controls retractor device 332；Retractor device 332 is provided with expansion link 335, and expansion link 335 is above-mentioned is provided with conductive component 338；Spring 333 is sheathed on expansion link 335, and its one end is fixed on stop bit parts, and the other end is fixed on fixed part 336.This lamp holder 3 correct when being installed to lamp socket, conductive pin 301 is inserted into lamp socket (not shown)；Because being extruded by lamp socket, retractor device 332 moves along being inserted into lamp socket rightabout with conductive pin 301, and conductive component 338 inserts between shell fragment 334a, and two shell fragment 334a realize electrical connection, it is achieved the connection of conductive pin 301 and power supply (not shown).
The company both sides of the LED daylight lamp of the embodiment of the present invention all arrange same lamp holder.Reduction installation personnel is when installing LED daylight lamp so greatly, the injury that due to leakage current brings.Meet the requirement of Safety Approval simultaneously.
In the case of LED daylight lamp is not mounted to lamp socket, due to the tension force of spring, it is achieved power supply (not shown) disconnects with conductive pin 301.
In such scheme, 2 is relative and spaced shell fragment 334a is substantially in eight shape or horn-like.Shell fragment 334a is it is also preferred that the left select copper material.
As shown in Figure 40 E, for the structural representation of a holder structure of another embodiment of the present invention.Lamp holder 3, comprises:
Lamp holder body 300, power supply 5, also have be arranged at lamp holder body 300 top conductive pin 301,
The retractor device 332 of lamp holder body, one-body molded opening-like shell fragment 334a can be stretched out along one end of conductive pin 301 direction (i.e. LED daylight lamp is axial) movement；Retractor device 332 is provided with stop bit parts, the amplitude (i.e. retractor device 332 stretches out the amplitude of lamp holder body) moved by this stop bit component controls retractor device 332；Retractor device 332 is provided with expansion link 335, and shell fragment 334a is arranged at the end of this expansion link 335, and the peristome of shell fragment 334a is sheathed on expansion link 335 towards power supply 5 direction, spring 333, and its one end is fixed on stop bit parts, and the other end is fixed on power supply 5.This lamp holder 3 correct when being installed to lamp socket, conductive pin 301 is inserted into lamp socket (not shown)；Because being extruded by lamp socket, retractor device 332 moves along being inserted into lamp socket rightabout with conductive pin 301, and the peristome of shell fragment 334a snaps fit onto the connecting portion preset on power supply 5, it is achieved the electrical connection of conductive pin 301 and power supply 5.In the case of LED daylight lamp is not mounted to lamp socket, due to the tension force of spring, it is achieved power supply 5 disconnects with conductive pin 301.
The company both sides of the LED daylight lamp of the embodiment of the present invention all arrange same lamp holder.Reduction installation personnel is when installing LED daylight lamp so greatly, the injury that due to leakage current brings.Meet the requirement of Safety Approval simultaneously.
As shown in Figure 40 F, for the structural representation of a holder structure of another embodiment of the present invention.Lamp holder 3, comprises:
Lamp holder body 300, power supply 5, also have be arranged at lamp holder body 300 top conductive pin 301,
The retractor device 332 of lamp holder body can be stretched out along one end of conductive pin 301 direction (i.e. LED daylight lamp is axial) movement；Retractor device 332 is provided with stop bit parts, the amplitude (i.e. retractor device 332 stretches out the amplitude of lamp holder body) moved by this stop bit component controls retractor device 332；Retractor device 332 is provided with expansion link 335, and this expansion link 335 uses engraved structure near power supply 5 side mid portion；Power supply 5 be provided with reed, this lamp holder 3 correct when being installed to lamp socket, conductive pin 301 is inserted into lamp socket (not shown)；The engraved structure making expansion link hooks the ends contact of the reed on power supply 5 and the expansion link contact to power supply 5, it is achieved the electrical connection of conductive pin 301 and power supply 5.In the case of LED daylight lamp is not mounted to lamp socket, due to the tension force of spring so that the end of expansion link 335 is clipped between the reed on power supply 5 and contact, it is achieved power supply 5 disconnects with conductive pin 301.
The company both sides of the LED daylight lamp of the embodiment of the present invention all arrange same lamp holder.Reduction installation personnel is when installing LED daylight lamp so greatly, the injury that due to leakage current brings.Meet the requirement of Safety Approval simultaneously.
In such scheme, expansion link 335 uses flat strip structure, and intermediate portion uses engraved structure, and when LED daylight lamp is not mounted to lamp socket, the end of expansion link 335 is clipped between reed and contact, it is achieved power supply 5 disconnects with the physics of conductive pin 301.
In such scheme, the reed being arranged on power supply 5 can be set to bridge like, arranges the reed towards contact on bridge floor, and the expansion link of the most flat strip passes bridge arch, and its end is clipped between reed and contact.Deenergization 5 and conductive pin 301 physically.
In above-mentioned scheme, retractor device 332 stretches out the length length less than the conductive pin of this lamp holder of lamp holder.It is also preferred that the left retractor device 332 stretches out the 20%～95% of the length of the conductive pin of this lamp holder a length of of lamp holder.
In one embodiment of the present of invention, the length dimension of the second side lamp head 3 is short compared with the first side lamp head 3 length.General, the length dimension of the second side lamp head 3 is the 30%～80% of the length dimension of the first side lamp head 3.The length dimension of the more preferably second side lamp head 3 is the 2/3 of the length dimension of the first side lamp head 3.In this embodiment, the half of the size of the length dimension substantially first side lamp head 3 of the second side lamp head 3.The size of the first side lamp head 3 is between 15mm～65mm (concrete depending on application scenario).
It should be noted that the thickness of the second conductive layer of the flexible circuit board with bilayer conductive layer is preferably thick compared to the thickness of the first conductive layer, thereby can reduce the line loss (pressure drop) on positive wire and negative wire.Furthermore, there is the flexible circuit board flexible circuit board compared to single conductive layer of bilayer conductive layer, owing to the positive wire at two ends, negative wire are moved to the second layer, the width of flexible circuit board can be reduced.On identical tool, the discharge quantity of narrower substrate, more than wider substrate, therefore can improve the production efficiency of LED module.And have the flexible circuit board of bilayer conductive layer relatively on be relatively easy to maintain shape, to increase the reliability produced, such as: the accuracy of welding position during the welding of LED component.
Deformation as such scheme, the present invention also provides for a kind of LED straight lamp, at least part of electronic building brick of the power supply module of this LED straight lamp is arranged on lamp plate: i.e. utilize PEC (printed electronic circuit, PEC:Printed Electronic Circuits), technology is by least part of electronic building brick printing or is embedded on lamp plate.
In one embodiment of the present of invention, the electronic building brick of power supply module is provided entirely on lamp plate.Its manufacturing process is as follows: substrate prepares (flexible printed circuit preparations) → spray printing metal nano ink → spray printing passive block/active device (power supply module) → dryings/sintering → spray printing interlayer connection projection → spray insulation ink → spray printing metal nano ink → spray printing passive block and active device (the like formation comprised multi-layer sheet) → sprayed surface welded disc → spraying solder resist and welds LED component.
In above-mentioned the present embodiment, if be provided entirely on lamp plate by the electronic building brick of power supply module, only need to be connected the pin of LED straight lamp by welding lead at the two ends of lamp plate, it is achieved pin and the electrical connection of lamp plate.Thus again substrate need not be set for power supply module, and then can further optimize the design of lamp holder.It is also preferred that the left power supply module is arranged on the two ends of lamp plate, reduce the heat impact on LED component that its work produces the most as far as possible.The present embodiment, because reducing welding, improves the overall reliability of power supply module.
If part electronic building brick is printed on lamp plate (such as resistance, electric capacity), and by big device such as: inductance, the electronic building brick such as electrochemical capacitor is arranged in lamp holder.The manufacturing process of lamp plate is ibid.So by by part electronic building brick, it is arranged on lamp plate, rational layout power supply module, optimizes the design of lamp holder.
As above-mentioned scheme deformation, it is possible to realize being arranged on lamp plate the electronic building brick of power supply module by the way of embedding.That is: in the way of embedding, on pliability lamp plate, embed electronic building brick.It is also preferred that the left the methods such as the ink that the copper coated foil plate (CCL) containing resistor-type/capacitor type or silk screen printing are relevant can be used to realize；Or use inkjet technology to realize the method embedding passive block, i.e. using ink-jet printer directly on the position set in as the electrically conductive ink of passive block and correlation function ink jet-printing to lamp plate.As the deformation of such scheme, passive block can also ink-jet printer directly using on as the electrically conductive ink of passive block and correlation function ink jet-printing to lamp plate).Then, through UV optical processing or drying/sintering processes, the lamp plate of potting passive block is formed.It is embedded in electronic building brick on lamp plate and includes resistance, electric capacity and inductance；In other embodiments, active block is also suitable.Carry out rational layout power supply module by such design and then reach to optimize the design of lamp holder (owing to part uses embedded resistance and electric capacity, the present embodiment has saved the printed circuit board surface space of preciousness, reduces the size of printed circuit board (PCB) and decreases its weight and thickness.Simultaneously because eliminate the pad (pad is the part being easiest to introduce fault on printed circuit board (PCB)) of these resistance and electric capacity, the reliability of power supply module have also been obtained raising.The length of printed circuit board (PCB) upper conductor will be shortened and allow greater compactness of device layout simultaneously, thus improve electric property).
Coordinate Figure 19 and Figure 20, short circuit board 253 is distinguished into the first short circuit board and the second short circuit board being connected with long circuit board 251 two ends, and on the first short circuit board of short circuit board 253 of being respectively set at of the electronic building brick in power supply module and the second short circuit board.The length dimension of the first short circuit board and the second short circuit board can with rough unanimously, it is also possible to inconsistent.Typically, the 30%～80% of the length dimension that length dimension is the second short circuit board of the first short circuit board (right-hand circuit board of the short circuit board of Figure 19 253 and the left side circuit board of the short circuit board 253 of Figure 20).The length dimension of the more preferably first short circuit board is the 1/3～2/3 of the length dimension of the second short circuit board.In this embodiment, the half of the size of the length dimension substantially second short circuit board of the first short circuit board.The size of the second short circuit board is between 15mm～65mm (concrete depending on application scenario).In the lamp holder of one end that the first short circuit board is arranged at LED straight lamp, and described second short circuit board is arranged in the lamp holder of the relative other end of LED straight lamp.
Because using the structure of external driving power supply, shorten the length dimension of lamp holder.For ensureing that the entire length of LED meets regulation, the length of its lamp holder cripetura is supplied by the length of prolonging lamp tube.Because the length of fluorescent tube has prolongation, correspondingly extend the length of the lamp plate being attached in fluorescent tube.Under equal lighting condition, being attached to the interval between the LED component on the lamp plate of tube inner wall can strengthen accordingly, owing to the interval between LED component increases, so can improve radiating efficiency, reduce temperature when LED component operates, and can extend the life-span of LED component.
LED straight lamp of the present invention in the realization of each embodiment with as previously mentioned.Need point out be, in various embodiments, for same LED straight lamp, " lamp plate use bendable circuit soft board ", the molectron of length circuit board " power supply have ", " etc. in feature, one or more technical characteristic can be only included.
Additionally, wherein content system about " lamp plate use bendable circuit soft board " can be selected from one of them or a combination thereof including its correlation technique feature in embodiment.
Such as, in lamp plate uses bendable circuit soft board, it is connected by wire routing between described bendable circuit soft board and the outfan of described power supply or welds between described bendable circuit soft board and the outfan of described power supply.Additionally, described bendable circuit soft board includes a dielectric layer and the storehouse of a line layer；Bendable circuit soft board in the circuit protecting layer of surface-coated ink material, and can realize the function of reflectance coating by the width increased circumferentially.
Such as, in Power Management Design, the molectron of length circuit board has a long circuit board and a short circuit board, long circuit board and short circuit board are fitted each other and fixed through gluing mode, and short circuit board is positioned at long circuit board adjacent peripheral edges.There is on short circuit board power supply module, be monolithically fabricated power supply.
At the driving framework of Double-End Source, can only use in the way of wherein one end is with as single ended power supply by support and receive external drive signal.
When direct current signal is as external drive signal, the power supply module of LED straight lamp can omit rectification circuit.
In the rectification circuit of power supply module designs, can be that there is single rectification unit, or double rectification unit.The first rectification unit in double rectification circuits and the second rectification unit pin with the two ends lamp holder being arranged in LED straight lamp respectively couples.Single rectification unit is applicable to the driving framework of single ended power supply, and double rectification unit is applicable to the driving framework of single ended power supply and Double-End Source.And when being configured with at least one rectification unit, go for the drive environment of low-frequency ac signal, high frequency ac signal or direct current signal.
In the pin of LED straight lamp designs, can be each single pin of both-end (totally two pins), the framework of each pair of pin of both-end (totally four pins).Under the framework of each single pin of both-end, it is applicable to the rectification circuit design of single rectification circuit.Under the framework of each pair of pin of both-end, it is applicable to the rectification circuit design of double rectification circuit, and uses each arbitrary pin of both-end or arbitrary single-ended double pins to receive external drive signal.
Furthermore it is possible to additionally increase protection circuit to protect LED module.Protection circuit can detect the electric current of LED module and/or voltage carrys out corresponding startup and corresponding crosses stream or overvoltage protection.
In the auxiliary power module of power supply module designs, energy-storage units can be battery or super capacitor, in parallel with LED module.Auxiliary power module is suitable for inclusion in the LED drive module design of drive circuit.
In the LED module of power supply module designs, LED module can comprise the multi-string LED assembly being connected in parallel to each other (i.e., single LED chip, or the LED group of multiple LED modules with different colors chip composition) string, the LED component in each LED component string can be connected to each other and form netted connection.
It is to say, features described above can be made arbitrary permutation and combination, and for the improvement of LED straight lamp.

Claims (10)

1. a LED straight lamp, is adapted to be mounted in a lamp socket use, it is characterised in that including:
One fluorescent tube；
Two lamp holders, are respectively provided with at least one pin, and are suitable to be respectively coupled to the two ends of this fluorescent tube, described two lamps The described pin system of head is in order to receive an external drive signal；
One first rectification circuit, couples the described pin of described two one of them lamp holder of lamp holder, is in order to institute State external drive signal and carry out rectification, to produce a rectified signal；
One second rectification circuit, couples the described pin of described two lamp holders wherein another lamp holder, be in order to institute State the first rectification circuit and described external drive signal is carried out rectification simultaneously；
One filter circuit, couples with described first rectification circuit and the second rectification circuit, is in order to described whole After stream, signal is filtered, to produce a filtered signal；
One LED drive module, couples with described filter circuit, and is configured to receive described filtered signal And producing a driving signal, described LED drive module comprises a LED module, and described LED module In order to receive described driving signal and luminous；And
One detecting module, is to decide whether to end described external drive signal to flow through described LED straight lamp, and described in detect Surveying module and have one first sense terminal and one second sense terminal, described first sense terminal couples described first rectification circuit and/or the Two rectification circuits, described second sense terminal couples described filter circuit；
Wherein, when the electric current flowing through described first sense terminal and described second sense terminal is greater than or equal to a current value, institute Stating detecting module conducting makes described LED straight lamp operate in a conducting state；When flowing through described first sense terminal and described second When one electric current of sense terminal is less than described current value, the cut-off of described detecting module makes described LED straight lamp enter a not on-state.
LED straight lamp the most according to claim 1, it is characterised in that
Described detecting module comprises an on-off circuit, a detection pulse generating module, a testing result latch cicuit and a detection and sentences Determining circuit, wherein said detection decision circuit couples described testing result latch cicuit, the first sense terminal and the second sense terminal, And in order to detect the signal between described first sense terminal and the second sense terminal, described so that a testing result signal is sent to Testing result latch cicuit；Described detection pulse generating module couples described testing result latch cicuit, and in order to notify described inspection Survey the point on opportunity of result latch circuit latches testing result；Described testing result latch cicuit couples described on-off circuit, and is suitable to According to described testing result signal latch one testing result, and described testing result is reflected into described on-off circuit；And it is described On-off circuit, according to described testing result, determines on or off between described first sense terminal and the second sense terminal.
LED straight lamp the most according to claim 2, it is characterised in that
Described detection pulse generating module comprises: one first capacitor and one second capacitor, one first resistor and one second resistor One first buffer, a reverser, a diode and one or door；One end of described first resistor is coupled to described reverser) An input, and the other end is suitable for couple in a driving voltage；One end of described second resistor is coupled to described first buffering One input of device, and the other end is suitable for couple in a reference potential；The negative terminal of described diode is also coupled to described first buffer Described input, and be connected with described second capacitor in parallel；One end of described first capacitor and described second capacitor One end couples jointly, and the described end that jointly couples is suitable for couple in a driving voltage, and another termination of described first capacitor is described The described input of reverser, the other end of described second capacitor then couples the described input of described first buffer；Institute One outfan of an outfan and described first buffer of stating reverser is respectively coupled to described or two inputs of door, and described or One outfan of door couples described testing result latch cicuit.
LED straight lamp the most according to claim 3, it is characterised in that described detection pulse generating module further includes One the 3rd capacitor, one the 3rd resistor and one second buffer；Wherein said 3rd capacitor and the one of the 3rd resistor Junction point couples an input of described second buffer, and an outfan of described second buffer couples described first capacitor And described the described of second capacitor couples end jointly；Described 3rd capacitor and the 3rd resistor are in use series at a driving Between voltage and a reference potential, and described 3rd capacitor, the 3rd resistor and the second buffer are suitable to drive described in process Galvanic electricity pressure is equal to the time to produce an input pulse signal in the described end that jointly couples, the pulse width of described input pulse signal Cycle, and terminated in the described time cycle, export a low level and jointly couple end in described.
LED straight lamp the most according to claim 2, it is characterised in that described detection decision circuit switchs coupling through one Connect end and described on-off circuit couple described first sense terminal, and couple described testing result latch cicuit through a testing result end, Wherein said detection decision circuit comprises: a comparator and a resistor；The end of oppisite phase of described comparator is suitable to receive a reference Level signal, non-oppisite phase end is suitable for couple to described switch and couples end and connect described second sense terminal through described resistor, and described ratio One outfan of relatively device comprises described testing result end.
LED straight lamp the most according to claim 5, it is characterised in that when described first sense terminal and second is detectd Surveying the described signal between end causes the electric current flowing through described resistor to be enough to make the level at described non-oppisite phase end be higher than described ginseng When examining the level of level signal, described comparator produces the described testing result signal of high level and is exported by described testing result end； And cause the electric current flowing through described resistor not enough when described signal between described first sense terminal and the second sense terminal so that When the level of described non-oppisite phase end is higher than the level of described reference level signal, described comparator produces low level described detection Consequential signal is also exported by described testing result end.
LED straight lamp the most according to claim 2, it is characterised in that described testing result latch cicuit is through an inspection Survey result end and couple described detection decision circuit, latch end through a testing result and couple described on-off circuit, and believe through a pulse Number outfan couples described detection pulse generating module；Wherein said testing result latch cicuit comprises a D flip-flop, an electricity Resistance device) and one or door；One clock input of described D flip-flop couples described testing result end, and an input (D) is fitted In coupling a driving voltage, one end of described resistor is coupled to an outfan (Q) of described D flip-flop, and the other end is suitable to Couple a reference potential；And described or door has two inputs and is respectively coupled to described pulse signal output end and described D type touches Send out device described outfan (Q), and have an outfan couple described testing result latch end.
LED straight lamp the most according to claim 2, it is characterised in that described on-off circuit couples described first and detects Survey end, latch end through a testing result and couple described testing result latch cicuit, and couple end through a switch and couple described detection Decision circuit；And described on-off circuit comprises a transistor, the first sense terminal, described testing result described in described transistor couples Latch end and described switch couples end.
LED straight lamp the most according to claim 8, it is characterised in that when described detection pulse generating module produces During one pulse signal, conducting is made described detection decision circuit carry out detecting to determine that described testing result latches electricity by described transistor The testing result latch signal that end output is latched in described testing result in road is high level or low level；When described testing result is locked Depositing signal when being high level, conducting is made to turn between described first sense terminal and the second sense terminal by described transistor；And work as When described testing result latch signal is low level, cut-off is made described first sense terminal and the second sense terminal by described transistor Between end.
LED straight lamp the most according to claim 8, it is characterised in that described transistor comprises a two-carrier and connects Junction transistor is as a power transistor, and the collector of described bipolar junction transistors couples described first sense terminal, and base stage couples Described testing result latches end, and emitter-base bandgap grading couples described switch and couples end.
CN201610160152.7A 2015-03-25 2016-03-21 LED straight lamp Pending CN106015996A (en)

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