CN105530737B - Dual-mode operation LED light - Google Patents

Dual-mode operation LED light Download PDF

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CN105530737B
CN105530737B CN201510556679.7A CN201510556679A CN105530737B CN 105530737 B CN105530737 B CN 105530737B CN 201510556679 A CN201510556679 A CN 201510556679A CN 105530737 B CN105530737 B CN 105530737B
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led
circuit
power
mode
powered
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CN105530737A (en
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约翰·M·达文波特
大卫·比纳
耶利米·埃尔曼
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Energy Focus Inc
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Energy Focus Inc
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Priority claimed from US14/555,294 external-priority patent/US20160113076A1/en
Priority claimed from US14/702,591 external-priority patent/US9557044B2/en
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Abstract

LED light has double operation mode by fluorescent lamp holder.When the power contact for the lamp bracket that the insertion of the first and second power pins of lamp first end is directly connected with power transmission line, the first circuit is the LED power supply at least one first operational mode.When power contact of the third power pins of the second source pin of the lamp first end and lamp second end insertion by the lamp bracket of electric ballast power supply, second circuit is the LED power supply at least one second operational mode.First and second conduction control members allow second circuit to power in the second operational mode at least one LED.

Description

Dual-mode operation LED light
Technical field
LED light of the present invention use dual-mode operation, can by fluorescent lamp holder connect transmission of electricity electric power or by with The connected electric ballast of lamp bracket provides electric power.
Background technique
After a kind of route of traditional slender type LED (light emitting diode) lamp reconfigures, it can be transformed into existing glimmering Light lamps and lanterns, directly to provide main power source for LED light.LED light after " transformation " is usually drawn from a pair of of power supply of lamp one end Foot transmits electric power, and has a pair of of connector pin in the other end of lamp, what they were not intended to transmit electric power, but provides machinery for lamp It supports.The design that power pins described above by lamp one end are powered helps to reduce installation personnel in the installation of lamp In the process, the potential life threat because being generated by principal current electric shock.
Second of traditional method that slender type LED light is transformed into existing fluorescent lighting fixture, it is not necessary to reconfigure lamps and lanterns Route, only need to be can be realized using electronic ballast for fluoresent lamp.In the case where there is fluorescent lamp, LED retrofit lamp from lamp two The power pins at (i.e. opposite both ends) are held to obtain electric power.It is this repacking lamp representative type be Park invention Patent No. The product of 8,089,213 B2 of US.Park LED light by the way that existing fluorescent lamp ballast is connected with fluorescent lamp holder, into Row single-mode operation.In the 26th -30 row on the 4th column of the patent, Park is indicated using the capacitor C11- in its Fig. 1 C14 " capacitor of control fluorescent lamp ballast series resonant circuit ".Since the frequency of Park fluorescent lamp ballast is up to 50 kilo hertzs (the 58th row on the 8th column and the 4th row on 11 columns), capacitor C11-C14 must also have a high impedance, supply frequency be 50 or 60 hertz.In this way, capacitor C11-C14 can efficiently reduce the frequency of electric current, prevent because accidentally by LED retrofit lamp with Fluorescent lamp ballast is directly connected on main power source, and causes potential fatal shock hazard.
Design of Luminaires teacher think to produce a kind of LED transformation lamp of dual-mode operation in time, it can will be existing Fluorescent lamp ballast is connect with fluorescent lighting fixture, can also directly be connect with power line.The U.S. Patent No. US8 that clock et al. is developed, The product of 575,856B2 is a dual-mode operation LED light.However, either passing through AC power source or existing fluorescent lamp Electric ballast power supply, it is all to have used a single main circuit for the LED power supply in lamp.Pass through alternating current with simple Source or electronic ballast for fluoresent lamp power supply are compared, and this practice reduces the potential energy source efficiency and stability of lamps and lanterns.
The LED light that clock et al. is developed is also defective, and when lamps and lanterns are directly connected on power line, it can not alleviate potentially Fatal shock hazard.This is because in the state of AC power source work, electric power and electronic ballast for fluoresent lamp that LED light uses On identical circuit.So just having potential shock hazard, i.e., during mounted lamp, the life of installation personnel is made At threat.
Therefore, the LED transformation lamp that we to be designed will use dual-mode operation, both can be by existing fluorescence lamp electronic town Stream device is connect with fluorescent lighting fixture, can also efficiently be powered with stable directly being realized by power circuit.Meanwhile in the configuration of lamp Aspect has also fully considered how to evade generated potentiality when lamp is directly connected on lamps and lanterns with the power supply of power line Fatal shock hazard.
Summary of the invention
Present invention incorporates the dual-mode operations of LED transformation lamp.In the first mode, LED is transformed lamp and receives from glimmering The electric power of light lamp lamp bracket；Another, in second mode, LED is transformed lamp and is obtained by the electric ballast of fluorescent lamp holder Electric power.In the flrst mode, LED light obtains electric power by a pair of of power pins of lamp one end.Under the second mode, LED light is logical It crosses the electronic ballast for fluoresent lamp connecting with lamps and lanterns and obtains electric power.Above-mentioned dual-mode operation passes through the first and second circuit branch respectively Hold the operation of the first and second operation modes.First and second circuits share LED light power pins and usually identical Light emitting diode provides electric power, and the first and second circuits can be electrically isolated by novel conduction control model.
Under a kind of mode, dual-mode operation LED light provided by the invention is electrically connected by fluorescent lamp holder and transmission of electricity Electric power is provided, or provides AC power source by electric ballast with ballast frequency.The LED light has an elongated shell, The shell of shell has both ends.First end is configured with the first and second power pins.Second end is configured with third power pins.First Circuit provides main electric power at least one LED light of the first mode, and provides extraneous light along the outer rim of shell.When LED light is encased on fluorescent lamp holder (electric power that the contact point of power source on frame can receive the first and second power pins), and with When power line is directly connected to, first mode occurs, and the frequency of power supply power supply is far below ballast frequency described above.The One circuit limits the electric current supply of at least one LED light under the first mode.Second circuit be under second of mode extremely A few LED light provides main electric power, and provides extraneous light along the outer rim of shell.When LED light is encased in fluorescent lamp holder When upper (electric power that the power contact on lamp bracket can receive second and third power pins), second mode occurs, LED light it is another One opposite end is connect with electric ballast receives electric power.The rectification circuit reception second for including in second circuit and third power supply draw The electric power of foot.First conduction control member is connected between second source pin and rectification circuit, when second and third power supply Pin guarantees second circuit in the second mode at least one LED light when the other end of lamp is connect with electric ballast It transmits electric power.Second conduction control member is connected between third power pins and rectification circuit, when second and third power supply Pin guarantees second circuit in the second mode at least one when another opposite end of lamp is connect with electric ballast LED light transmits electric power.
Under certain particular situations, at least one LED light can power in the flrst mode and at least one LED light can power in second mode, their at least one common LED light.In other cases, at least one LED Lamp can power in the flrst mode and at least one LED light can power in second mode, but they are not common LED light.
Above-mentioned LED light can be transformed into existing fluorescent lamp holder, have dual-mode operation, both can be by existing fluorescence Lamp electronic ballast is connect with lamps and lanterns, or directly can obtain electric power by power line.Its advantage is that when lamp is installed to lamps and lanterns On directly connect with power line acquisition power supply when, LED light configuration can mitigate potential danger brought by fatal electric shock.The lamp The additional precautionary measures also are provided to avoid installation personnel from getting shocked in invention configuration.
It is single as a variety of existing references are said in addition, the operation of above-mentioned LED light is than using more effective It is to be powered by electric ballast or directly take electricity by power line, and mentioned for LED light that main circuit, which can incude lamp device, For suitable electric power.According to what is summarized above, the not instead of main circuit that the present invention uses passes through the first and second electricity Road obtains the power supply that power line connects electricity or existing fluorescent lamp ballast.This method eliminates use active LED driving main circuit When, the energy loss of reprocessing generation is carried out by existing fluorescent lamp ballast.In this way, usual second circuit only needs Several passive elements are wanted, such as diode rectifier circuit and one or more capacitors, save cost.
Detailed description of the invention
It is described in detail below and drawing (wherein corresponding element has corresponding Ref. No.) by reading, will be easy to see Further characteristic of the invention and advantage out:
Fig. 1 is electrical schematic diagram, part be module map, elaboration according to the invention, the schematic diagram be fluorescent lamp holder to The power pins of LED light directly provide the schematic diagram of electric power.
Fig. 2 is similar with Fig. 1, but provides the schematic diagram of electric power for four power contacts of fluorescent lamp holder.
Fig. 3 and Fig. 4 is electrical schematic diagram, and part is module map, and elaboration according to the invention, which is fluorescent lamp Frame includes the schematic diagram of respective type of electronic ballast for fluoresent lamp and LED light.
Fig. 5 is the electrical schematic diagram of LED lamp circuit shown in Fig. 1-4.
Fig. 6 and Fig. 7 is the electrical schematic diagram of the preferred LED circuit of arrangement LED light shown in Fig. 5.
Fig. 8 is similar with Fig. 5, but Fig. 5 does not include using one by second circuit and the first and second conduction control members Between and operating frequency be ballast frequency isolating transformer.
Fig. 9 is similar with Fig. 8, but Fig. 8 does not include using one by second circuit and the first and second conduction control members Between and operating frequency be ballast frequency auto-transformer.
Figure 10 is the electrical schematic diagram of LED power, including the high-frequency isolation transformer between electric power input and output.
Figure 11 is the electrical schematic diagram of LED power, does not include the component that electric power input and output is isolated.
Figure 12,13 and 14 are the electrical schematic diagram of the circuit in LED light shown in Fig. 1-4, can be used as another choosing of Fig. 5 It selects.
The part Figure 15 is perspective diagram, is partially electrical schematic diagram, illustrates the arrangement of LED light risk of shock test.
Figure 16 illustrates the various electricity of the alternate embodiment of conduction control member shown in Fig. 5 and Figure 12-14 in a tabular form Gas schematic diagram, and other qualifications are provided for these embodiments.
Specific embodiment
The example and drawing referred in detailed description is only for example use, not to any the scope of the patents or explains composition limit System.
Definition
It is defined below applicable herein in specification and accessory claim:
" active component " refers to a controllable electronic component, can be with voltage or current system to containing active component Circuit supply controllable energy.For example, transistor.
" active circuit " refers to a kind of circuit, it passes through a control loop containing feedback and active component, limitation Load current.
" passive element " refers to an electric component, it can not be in the form of voltage or electric current to including passive element Circuit provides external controlled energy.The example of passive element has rectifier diode, LED diode, resistance, capacitor, inductance and behaviour The magnetic ballast that working frequency is 50 or 60 hertz.
" passive circuit " refers to a kind of circuit, does not include defined herein active component.
" electronic ballast for fluoresent lamp " or similar device refer to a kind of ballast of instantaneous starting, the ballast of quick start Device, ballast etc. of program starting other the ballast of fluorescent lamp current limliting is realized using switching type power supply." fluorescent lamp electronic ballast Device " does not include so-called magnetic ballast.
" power line " refers to the conductor that AC or DC electricity is supplied to terminal user.The frequency of the alternating current of offer is logical Often between 50 to 60 hertz, leading to common RMS voltage is 100 to 344 volts.The power supply that special power line provides is 400 Hertz.Herein power line frequency be zero it is corresponding be DC power supply.
For " isolation " transformer herein, turn ratio is not limited in 1:1.
Other definition, which see below, describes " conduction control member " and the citing of term " permission ".
Fluorescent lamp holder
Fig. 1 shows the standard fluorescent lamp lamp bracket 100 of slender type LED light 102.Fluorescent lamp holder 100 passes through power supply respectively Contact point 105 and 107 provides electric power from power supply 109 to the first and second power pins 104 and 106.125 He of contact point of power source 127 are not connected with and can not receive main power source, patch the third and fourth power pins 124 and 126 respectively and carry out mechanical support to it. First circuit 110 includes LED power supply module, the electric power for being used to drive LED300 in LED light 102 that electric supply 109 provides, example The electric current for leading to LED can such as be limited.LED light 102 also includes second circuit 140, and being not used in Fig. 1 is because of second circuit 140 be to use ballast in order to no from electronic ballast for fluoresent lamp acquisition electric power, Fig. 1.
Power supply 109 may be an alternating current source, and general supply frequency is 50 or 60 hertz or 400 hertz.Power supply 109 It is also likely to be a DC power supply, in this case, supply frequency is considered as zero.
Fig. 1 is seen again, and the invention of this application protection considers first and second power pins of 102 one end of LED light and another The third power pins 124 at end.As shown in Figure 1, the first power pins 106 occur with third power pins 124 it is axially displaced, this It is a little not important；They can also axially align each other.The second circuit 140 of LED light 102 is not used for Fig. 2, is because of second Circuit 140 is in order to obtain electric power from electronic ballast for fluoresent lamp, without using the ballast in Fig. 2.
Fig. 2 is similar with Fig. 1, shows that standard fluorescent lamp lamp bracket 115 passes through four power pins of the power supply 109 to LED light 102 104,106,124 and 126 electric power is provided.Power line passes through the contact point of power source 125 and 127 of fluorescent lamp holder 115 to respectively Three and the 4th power pins 124 and 126 transmit electric power.First circuit 110 includes a LED power, it can influence power supply 109 and is The electric power that LED300 in LED light 102 is provided, such as the electric current for leading to LED can be limited.With 100 phase of fluorescent lamp holder of Fig. 1 Than if 102 opposite direction of LED light is attached to fluorescent lamp holder 115, power line will pass through contact point of power source 125 and 127 to first Circuit 110 transmits electric power.
Fig. 3 shows the fluorescent lamp holder 120 of a standard, including instantaneous starting type electronic ballast for fluoresent lamp 122, root According to shown in Fig. 1 or Fig. 2, it is transmitted electric power by LED300 of the second circuit 140 into LED light 102.Second circuit 140 passes through The power pins at the opposite both ends of lamp, by the frequency reception power supply of instantaneous starting type electronic ballast for fluoresent lamp 122；This and Fig. 1 Power supply, which is received, by a pair of of power pins 104 and 106 of 102 the same side of LED light with the first circuit 110 in Fig. 2 forms distinctness Control.In Fig. 3, the electric power in electronic ballast for fluoresent lamp 122 is defeated by second source pin 106 by contact point of power source 107 LED light 102 is given, LED light 102 is conveyed to by third power pins 124 by contact point of power source 127.Second source pin 106 The opposite end of lamp is located at third power pins 126.For convenience, instantaneous starting type electronic ballast for fluoresent lamp is being used When 122, contact point of power source 105 and 107 may be short-circuit 108 short circuits and link together, and contact point of power source 125 and 127 can also 128 short circuits can be short-circuit to link together.As shown, the 4th power pins do not need to be connected in the circuit of lamp.
Fig. 4 shows that standard fluorescent lamp lamp bracket 130, electronic ballast for fluoresent lamp 122 wherein included are different from instantaneously opening Ejector half electronic ballast for fluoresent lamp 122 (Fig. 3).It is seen by example, electronic ballast for fluoresent lamp 123 (Fig. 4) may be quickly to open Ejector half or program actuated type.As shown in figure 3, fluorescent lamp holder 130 by second circuit 200 to shown in Fig. 1 or Fig. 2 with it is identical The LED light 300 of LED light provides electric power.Compared with the fluorescent lamp holder 100 and 115 of Fig. 1 and Fig. 2, second circuit 200 is not by Same power pins receive electric power.The main distinction between fluorescent lamp holder 120 (Fig. 3) and 130 (Fig. 4) is, fluorescent lamp Frame 130 is that each power pins 104,106,124 and 126 each provides individual conductor.For example, with regard to quick start For the fluorescent lamp holder 130 of type or program actuated type, it will usually use individual conductor.
It should be noted that the description to identical LED light 102, when being directly connected to power line by shown in Fig. 1 or Fig. 2 When upper, described using the first operation mode；When by being realized shown in Fig. 3 or 4 by electronic ballast for fluoresent lamp 122, then use Second of operation mode description.
LED lamp circuit
Fig. 5 shows the case where circuit 200 for the LED light 102 that figure 1 above -4 describes.Circuit 200 includes the first circuit 110 and second circuit 140, they can provide power supply for LED300, but need to meet the following conditions, i.e., whether used (a) Fluorescent lamp holder 100 (Fig. 1) or fluorescent lamp holder 115 (Fig. 2) or (b) fluorescent lamp holder 120 (Fig. 3) or 130 (Fig. 4).In Fig. 5 The LED300 of middle display is single concatenated LED of string, wherein " string " refers at least one LED.Concatenated LED300 can lead to Cross conventional skill, gone here and there with the one or more LED in parallel and serial of (a) one or more in parallel LED string (b), or (c) on The combination for stating topology (a) and (b) is replaced.The LED300 that preferred LED circuit 303 and 304 includes is respectively such as Fig. 6 and Fig. 7 institute Show.
Electrolytic capacitor 324 shown in second circuit 140, can be shared with the first circuit 110.Alternatively, if passing through one A optional blocking diode 325 is connected between node 308 and electrolytic capacitor 324, when the first circuit 110 mentions for LED300 When for electric power, there is no need to the capacitors for the first circuit 110.Present inventor it has been investigated that, having some embodiments In, the first circuit 110 cannot be fully charged for the relatively large electrolytic capacitor 324 of capacitor, this is made by the flashing of LED300 At.Blocking diode 325 can be made of p-n diode or another device for providing unidirectional current, such as Schottky two Pole pipe or silicon controller rectification (silicon-controlled, SCR).According to above statement " corresponding element has corresponding Ref. No. ", other Blocking diode 325 described in drawing (such as Fig. 5,12 and 13) is identical as description above.If can provide driving LED300's Alternative energy source storage, electrolytic capacitor 324, which can be cancelled, not to be had to.For example, such alternative energy source storage can be fluorescence The electrolytic capacitor or another electrolysis electricity on the first circuit 110 (Fig. 5) of lamp electronic ballast 122 (Fig. 3) or 123 (Fig. 4) Container.If cancelling electrolytic capacitor 324, as described above, it is possible to which leading to LED300 occurrence frequency is ballast frequency Flashing, it is possible to will lead to barcode scanner failure.
LED circuit shown in fig. 6 303 connect for realizing LED300 with the node on the circuit of Fig. 5 200: node 306 and 308 are located at top, and node 310 and 312 is located at bottom.LED300 in Fig. 6 and turn to diode 314,315,316, 317 and 320 be interconnected.When LED voltage class having the same, two serial numbers that LED300 is shown are equal. This is that when powering in order to prevent by the first circuit 110, significant difference occur by the electric current that each LED300 goes here and there.Turn to two poles Pipe can be formed by p-n diode or another device for providing unidirectional current, as Schottky diode or silicon controller rectify (silicon-controlled).
When LED300 is powered by the first circuit 110 (Fig. 5), turns to diode 314,315,316 and 317 and carry out electric current biography It leads, is reverse biased due to turning to diode 320, so being conducted without electric current.So have led to two string LED300 quilts Parallel work-flow.The quantity of each LED300 string is 20, and each LED voltage rating is about 3 volts, the between node 306 and 310 The voltage that one circuit 110 generates is about 60 volts of direct currents.For example, such voltage can be in the whole of main power source 109 (Fig. 1-4) It effectively generates in a typical range, is usually differed with RMS voltage volt from 100 to 300.
On the other hand, when the LED300 in the LED circuit of Fig. 6 303 is powered by second circuit 140 (Fig. 5), so that it may Continuously electric current is provided to two concatenated LED300 strings；That is, being gone here and there from node 308 to the LED300 in left side, then lead to It crosses steering diode 320 and is passed down through right side LED300 string, finally arrive node 312.When LED300 is powered by second circuit 140 When, it is nonconducting for turning to diode 314,315,316 and 317.As described above, the quantity of a string of LED is 20, each LED About 3 volts of voltage rating, when LED300 carries out series-fed by second circuit 140, between node 308 and 312 the Voltage caused by two circuits 140 is about 120 volts of direct currents.For example, such raised voltage, in turn further through fluorescent lamp electricity Sub-ballast provides electrical load to second circuit 140, suitable with typical 600 millimeters of fluorescent lamp.Such voltage is about First circuit 110 provides twice of voltage.
Operation of the second circuit 140 under high-voltage case reduces the levels of current of second circuit 140；The electric current of reduction It is horizontal to reduce the potential threat that 140 electric current of second circuit causes fatal electric shock to personnel again.Therefore, it can satisfy in the U.S. The UL risk of shock test request of electronic ballast for fluoresent lamp described in UL1598c standard and UL935 standard, fluorescence lamp electronic Ballast has instantaneous starting type 122 (Fig. 3) or quick-starting direct or other types 123 (Fig. 4), including some than older town Device is flowed, operation power is all down to 25 kilo hertzs.UL is also referred to as the laboratory of insurance company, and general headquarters are located at the U.S..If do not existed Second circuit 140 is operated under high-pressure situations can satisfy shock hazard described in UL1598c standard as previously stated New-type ballast operation frequency in test and UL935 standard is 45 kilo hertzs of condition, but generally can not meet old-fashioned ballast The shock hazard of device is tested, as previously mentioned, its operating frequency is about 25 kilo hertzs.
When second circuit 140 is operated under high-voltage case, especially by instantaneous starting type fluorescence lamp electronic town What stream device 122 (Fig. 3) was powered, it is also necessary to more effective mode be taken to operate electronic ballast for fluoresent lamp.More In kind embodiment, second circuit 140 is allowed to run under high-voltage case, and using one or more capacitors to LED300's Electric current is limited, and keeps it smaller, more economical；This advantage is discussed below.
It is hereafter gone here and there what Fig. 6 before mainly mentioning was described about left and right side LED300, those of ordinary skill can adopt Conventional technical ability: any single led to may be replaced with two or more parallel connection LEDs.
The LED circuit 304 that Fig. 7 is shown can guarantee that second circuit 140 is operated under higher voltage condition, work as behaviour When making electronic ballast for fluoresent lamp, it can easily meet electric shock test request described below, and can more effectively operate fluorescence Lamp electronic ballast.In various embodiments, for example, the electrical load that LED circuit 304 provides can be with different capacity , higher 900 millimeters or 1200 millimeters of the fluorescent lamp of voltage value it is compatible.In addition, in embodiment, circuit 304 can be reduced The size and expense of current limiting capacitance in various situations, below we can also speak of, when LED300 pass through the first circuit 110 power When, low-voltage parallel operation can also be carried out.LED circuit 304 includes two more suitable identical 326 Hes of LED circuit unit 327。
LED circuit unit 326 as shown in Figure 7, two series connection and relevant steering diode on the left of LED300 314,315,316,317 and 320 is identical as LED circuit 303 shown in fig. 6.In addition LED circuit unit 326 further includes steering two Pole pipe 318,319 and 321 and relevant LED300 string.When LED300 is powered by the first circuit 110, diode is turned to 318 and 319 is conductive；It turns to diode 321 to be reverse biased, so non-conductive.In the above example, each series connection of LED Quantity is 20, and each LED has one 3 volts of voltage rating, when the first circuit 110 (Fig. 5) is that LED powers, first RMS voltage caused by each series connection of the circuit 110 across LED300 is about 60 volts, and the series connection of LED300 is located at LED electricity Between node 306 and 310 in road unit 326.
When the LED300 power supply that second circuit 140 (Fig. 5) is the LED circuit unit 326 in Fig. 7, diode 320 is turned to It is gone here and there with 321 by 3 shown LED, carries out the continuous conduction of electric current.Each string has 20 LED, and each LED's is specified Voltage is about 3 volts, is about 180 volts by the series voltage that three LED go here and there.Turn to diode 314,315,316,317, 318 and 319 is non-conductive at this time.When operating second circuit 140 under high-voltage case, it may be implemented excellent described in two sections above Gesture.
As shown in fig. 7, LED circuit unit 327 on LED circuit 304 in operation diagram 7 and the operation LED electricity just described Road unit 326 is identical.That is, when refer to LED circuit unit 327, turn to diode 328,329,330,331, 332,333,334 and 335 when, function and when referring to circuit unit 326, turn to diode 314,315,316,317,318, 319,320 with 321 be as.Low-power LED light (as about 9 watts) may need to exclude LED circuit unit 327, and Gao Gong It should include LED circuit unit 327 if rate LED light (such as about 18 watts).In any case, second circuit 140 is all above Example in provide about 180 volts of direct current, have 20 LED, and the voltage rating of each LED in each LED series connection It may each be about 3 volts, this is more suitable for being transformed the fluorescent lamp that length is 900 millimeters or 1200 millimeters.
Present inventor it has been investigated that, when second circuit 140 be LED300 power supply voltage substantially exceed first When circuit 110, the operation of second circuit 140 will generate various negative effects.These negative effects include being applied to the first electricity The overtension of 110 component of road, it is possible to can be more than the voltage rating of 110 component of the first circuit.The LED of Fig. 7 can so be passed through One or more diode 314-321 and 328-335 of turning to of circuit 304 lead to harmful reverse leakage current.It is this harmful Reverse current is likely to result in LED300 and does not shine, or interruption flash of light once in a while, or issues brighter flash of light once in a while.There is example hair It is existing, when there is reverse biased and reaches harmful level in the voltage of node 307 to 311, it is possible to lead to 110 component of the first circuit Setting voltage value it is excessively high, the part or all of non-luminous phenomenon of LED300.In order to avoid above-mentioned negative effect, work as second circuit 140 be intended to LED300 power supply when, the first circuit 110 will with come by LED300 second circuit 140 monopolar current progress Isolation.
The preferred hand that first circuit 110 is isolated with the monopolar current for entering second circuit 140 by LED 300 Section, can choose one or more of mode: (a) on the first conductor 339 between node 306 and LED circuit unit 326 N channel type interface field effect transistor 337 (hereinafter referred to as " field effect transistor ", FET) connect with the first conductor 339； (b) the p channel type field effect transistor between node 310 and LED circuit unit 326 and the second conductor 344 are connected.Field effect Answering transistor 337 and 342 is the interface of the first circuit 110 and LED 300, so being referred to as " interface " field effect transistor. Field effect transistor 337 and 342 is biased due to bias circuit 340 and 345, is reached when voltage passes through node 306 and 310 When the predetermined value powered for LED 300, it will cause and the biographies of these field effect transistors is passed through with the frequency of direct current or approximate DC It leads, opaque phenomenon otherwise occurs.In the example for the LED 300 that figure 7 above is mentioned, the predetermined voltage of LED 300 is driven About 60 volts.For those skilled in the art, it is based on above-mentioned standard, perceives the bias plasma of 110 builtin voltage of the first circuit Road 340 and 345 is a kind of conventional means.
Field effect transistor 337 and 342 is commonly provided with body diode, and various frequency currents is allowed to pass through in one direction. Such body diode for field effect transistor 337 and 342 can be respectively indicated as diode 338 and 343；When diode 338 When being in nonconducting state with 343, following target can be realized: the electricity for preventing second circuit 140 from obtaining from node 306 to 310 Pressure is higher than the rated output voltage (such as example above mention about 60 volts) that the first circuit 110 is obtained from node 306 to 310； And the voltage for preventing second circuit 140 from obtaining from node 306 to 310 is negative value.However, since body diode 338 and 343 allows Alternating current source unidirectionally conducts, by shown in Fig. 3 and Fig. 4, field effect transistor 337 and 342 can according to electronic ballast for fluoresent lamp 122 or 123 frequency (hereinafter referred to as " ballast frequency ") carries out Bidirectional Conduction respectively, and frequency is more broadly usually at 45 kilo hertzs or so Range be from 20 kilo hertzs to 100 kilo hertz.So with limiting capacitance device is charged in the first circuit 110 and leads to LED 300 interruption flashes of light once in a while, or brighter flash of light is issued once in a while, and also to prevent the alternating current unidirectionally conducted from causing charge Accumulation and harmful high voltage.It is interface effect it is desirable for this purpose that configuring feed-through capacitor 341 for interface field effect transistor 337 Transistor 342 is answered to configure feed-through capacitor 346.In this way, it is ensured that electric current by ballast frequency defined above via Bidirectional Conduction is by interface field effect transistor 337 and 342, to reach this section of previously mentioned target.Similar bypass electricity Container (not shown) is also applied for by-pass current and passes through field effect transistor, diode or similar dress by ballast frequency Meeting unidirectional block electric current is set to conduct by ballast frequency.
Present inventor it has been investigated that, in certain embodiments, ideal state be by above-mentioned partition method with First conductor 339 and the second conductor 344 are all cascaded；When can so prevent second circuit 140 from powering to LED, electric current It is leaked from the first circuit 110 to LED 300 and LED 300 is caused not stop to flash.But in other embodiments, for example, LED The flashing or brighter scintillation occurred once in a while can be ignored, the first circuit 110 can only by the first conductor 339 or An isolating device on second conductor 344 is isolated with LED 300.
The above-mentioned isolating device in relation to LED circuit 304 can be changed, and the road p field effect transistor, dipole can be used Transistor or silicon-controlled or mechanical switch replace the road n field effect transistor 337.Another kind variation is with the road n field effect transistor Pipe, bipolar junction transistor, silicon-controlled or mechanical switch similarly substitute the road p field effect transistor 342.
By referring to the description in Fig. 6 and Fig. 7 to LED circuit 303 and 304, obtaining can be to LED circuit unit 326 and 327 Each of unit add one or more additional LED300, such as to turn to diode 318,319 and 321 relevant LED300 string, this will be apparent from for those of ordinary skill in the art.When maintenance is passed through by the first circuit 110 When node 306 and 310 provides identical voltage, second circuit 140 is further improved by node 308 and 312 and is supplied to LED Voltage.
One or more LED circuit units, such as LED circuit unit 327 can be added to the LED circuit 304 in Fig. 7.This Just allow repacking fluorescent lamp that can be carried out with longer (such as 1500 millimeters, 1800 millimeters, 2400 millimeters or longer) fluorescent lamp Efficiently repacking allows the low cost LED distribution in LED light more intensive, also to obtain illumination profile more evenly.
Also with reference to Fig. 5, circuit 200 includes that the first conduction control member 350 and second conduct control member 370, they Function include allow the first and second independent operatings of circuit 110 and 140.When LED light is inserted into electric power connector socket In the fluorescent lamp holder of (not shown), when supplying transmission of electricity electric power to the power pins of the lamp, the first conduction control member 350 It can also be used in the electric shock possibility for reducing possible threat to life with the second conduction control member 370.
When the fluorescent lamp holder 100 for using Fig. 1 or Fig. 2 respectively or 115, power supply 109 therein is direct by power transmission line It powers to the first and second power pins 104 and 106, the electric power of the first circuit 110 modulation driving LED300.First circuit 110 Including Fig. 1 and LED power shown in Fig. 2.Non-isolated and electric isolution power supply is considered as the first circuit 110.
Fig. 8 show circuit 380 in addition to include as previously described with ballast frequency second circuit 140 rectification circuit 282 and first and second conduct except the isolating transformer 382 run between control member 350 and 370, with the circuit 200 in Fig. 5 It is similar.The transformation ratio of selection transformer 382 provides another way and shows as previously described about LED circuit 304 in Fig. 7 to realize Example property voltage level.Then, the transformation ratio of transformer 382 is set as 3:1, the first and second circuits 110 from right to left in fig. 8 It can be powered with about 60 volts of voltage to LED300 with 140.However, after there is such transformation ratio, it is glimmering in earlier figures 3 Electronic ballast for fluoresent lamp 123 in light lamp electronic ballast 122 or Fig. 4 can provide about 180 volts to transformer 382 Special voltage, and as shown in the embodiment in Fig. 6 and Fig. 7, it is easier to through electric shock experiment and realizes as above about Fig. 6 and Fig. 7 The higher efficiency.This embodiment avoids when aforementioned LED is powered by the second circuit 140 of quasi- power supply, isolation structure is used Interface field effect transistor 337 and 342 in part, such as Fig. 7 is electric the first circuit 110 and the monopole from LED300 is isolated Stream.The transformation ratio of isolating transformer 382 is adjusted, such as selectes 2.8:1 rather than 3:1, perhaps circuit designers can be allowed to make embodiment Become more efficiently or safe.On the other hand, transformer is usually occupied than aforementioned insulating element used in Fig. 7 embodiment bigger Space.
The LED300 on circuit 380 in Fig. 8 may preferentially include a plurality of parallel connection except the single LED shown in LED.Using a plurality of parallel connection LED corresponding illumination can be suitably provided with the increase of 102 length of LED light.
Fig. 9 display circuit 390 is other than being substituted isolating transformer 382 (Fig. 8) with auto-transformer 392, in Fig. 8 Circuit 380 it is similar.Conductor 394 in 392 bottom of auto-transformer provide from the rectification circuit 282 of second circuit 140 to The current circuit access of first conduction control member 350；On the other hand, with the isolating transformer of similar capacity (such as in Fig. 8 382) it compares, auto-transformer is usually more efficient, small and exquisite, is easier to construct and spend less.Select the transformation ratio of transformer 392 Another way is provided to realize the exemplary electrical voltage levels about LED circuit 304 in Fig. 7 as previously described.Then, in Fig. 9 In the transformation ratio of transformer 392 is set as 3:1 from right to left, the first and second circuits 110 and 140 can be with about 60 volts Voltage is powered to LED300.However, electronic ballast for fluoresent lamp 122 or figure after there is such transformation ratio, in earlier figures 3 Electronic ballast for fluoresent lamp 123 in 4 can provide about 180 volts of voltage to transformer 382；And such as Fig. 6 and Fig. 7 In embodiment shown in, be easier to test by electric shock when running from electronic ballast for fluoresent lamp, and realize in operation as above The higher efficiency described in Fig. 6 and Fig. 7.This embodiment avoids powered as aforementioned LED by the second circuit 140 of quasi- power supply When, be isolated using the interface field effect transistor 337 and 342 in insulating element, such as Fig. 7 the first circuit 110 with from The monopolar current of LED300.It adjusts the transformation ratio of auto-transformer 392, such as selected 2.8:1 rather than 3:1, can allow circuit design Person makes embodiment become more efficiently or safe.
The LED300 on circuit 390 in Fig. 9 may preferentially include a plurality of parallel connection except the single LED shown in LED.Using a plurality of parallel connection LED corresponding illumination can be provided with the increase of 102 length of LED light, ground.
Figure 10 shows the isolation LED power 220 on a kind of the first circuit 110 of common LED light 102 (Fig. 1-4), Transmission of electricity electric power is received in the first and second power pins 104 and 106, and to the LED300 of Fig. 5 on output end 222 and 224 Modulation electric power is provided.Power supply 220 is that flyback LED drive circuit, including an isolating transformer 228 is isolated in off-line type." isolation " Mean through transformer with the just sufficiently limitation conduction of the grid frequency less than 10 milliamperes.As previously mentioned, isolating transformer 228 usually with the operation of ballast frequency.It is above-mentioned to define to isolated form transformer type cited herein.It is above-mentioned Power supply 220 includes a traditional output flyback two of field effect transistor (FET) 232, one of full-wave rectifying circuit 230, one Pole pipe 240 and capacitor 242.Signal applied to grid 233 controls field effect transistor in a way known 232。
When the LED light 102 in the fluorescent lamp holder 100 (Fig. 1) or 115 (Fig. 2) that operation is powered by the first circuit 110, Electric shock risk is advantageously reduced using the isolating transformer 228 in Figure 10.This why be able to achieve be because such as Fig. 5 in every From transformer 228 provide the first and second power pins 104 and the 106 to the first and second conduction control members 350 and 370 it Between current path isolation.Similarly, the isolating transformer 382 in Fig. 8 with previously with regard to the isolating transformer 228 in Figure 10 Same mode described in the sentence of operation realizes current path isolation.
It connects in Fig. 6 and Fig. 7 and LED in parallel on how to use, or how to use the isolating transformer in Fig. 8 382, or how using the auto-transformer in Fig. 9 second circuit 140 can be driven with voltage more higher than the first circuit 110 Dynamic LED300, has a kind of preferred scheme available.Aforementioned preferred embodiment is exactly to configure the first circuit 110, with the second electricity The roughly the same voltage of 140 applied voltage of road drives LED300.The circuit of this preferred embodiment can be realized with routine techniques.For example, Can with the isolating transformer 228 in isolated power supply 220 in configuration diagram 10, allow its have can be improved on transformer with output end The transformation ratio of voltage on 222 secondary coils being connected with 224.More specifically, aforementioned transformation ratio can be selected, allow first electricity Road 110 drives LED300 with the voltage roughly the same with 140 applied voltage of second circuit.About the embodiment of Fig. 6 and Fig. 7, this Preferred embodiment embodiment avoids to realize foregoing purpose and uses and turn to diode (such as 314 and 316) and insulating element, example Such as the interface field effect transistor 337 and 342 in Fig. 7.About the embodiment in Fig. 8 and Fig. 9, aforementioned preferred embodiment embodiment is kept away Exempt from using transformer shown in earlier figures.
Figure 11 illustrates the non-isolated LED power 250 on a kind of the first circuit 110 of common LED light 102 (Fig. 1-4), It receives electric power from power transmission line in the first and second power pins 104 and 106, and to Fig. 5's on output end 222 and 224 LED300 provides modulation electric power.Power supply 250 is that off-line type is depressured LED drive circuit, including a traditional full-wave rectifying circuit 230, a field effect transistor (FET) 252, the capacitor 254 of synthetic operation, inductor 256 and capacitor 258.Two poles Pipe 260 is high speed recovery diode.The signal for being supplied to the grid 253 of field effect transistor 252 passes through a kind of known mode To control field effect transistor 252.
As shown, the selected diode that feed-through capacitor 262 and 263 passes through full-wave rectifying circuit 230 is connected to allow Electric current is passed through with ballast frequency, to limit the electricity of the first circuit 110 when second circuit 140 is powered to LED as described above The charging of container (such as capacitor 254 and 258).The charging of aforementioned capacitor will lead to fragmentary flash of light or brighter than LED300 Fragmentary flash of light.In addition to using feed-through capacitor 262 and 263, the feed-through capacitor 264 and 265 shown in dotted line can also be used To substitute.In addition to using feed-through capacitor 262 and 263, feed-through capacitor 262 and 264 can also be used, or use shunt capacitance Device 264 and 265 substitutes.
In addition, using all four capacitors (i.e. capacitor 262,263,264 and 265) may preferably, especially For certain form of individual electronic ballast for fluoresent lamps 122 or 123 in Fig. 1 and Fig. 2 preferably.Such as aforementioned capacitor Device configuration can reduce the asymmetry that common mode conduction is carried out across respective diode, and aforementioned asymmetry can cause the first circuit 110 Make harmful act.
Earlier figures 10 and the LED power of Figure 11 220 and 250 are shown with citation form, represent isolation and non-isolated LED electricity Source.Isolation and a lot of other suitable settings of non-isolated LED power are all aobvious for those of ordinary skill in the art And it is clear to.Other available isolated power supplies have: basic circuit of reversed excitation, boosting circuit of reversed excitation, the lifting for increasing isolation Volt circuit or forward converter.Other available non-isolated power supplies have: step-up/step-down circuit, booster circuit, mound gram circuit or Sepic converter (SEPIC) circuit.
As shown in Figure 10 and Figure 11, for example, isolation and non-isolated LED power 220 and 250 generally include field effect transistor 232 or 252 active electrical component.So LED power 220 and 250 may include active circuit according to defined above.
Return to the circuit 200 of Fig. 5, the simple passive circuit typically above-mentioned of second circuit 140.Implement shown in In example, for example, second circuit 140 mainly includes the rectification circuit 282 formed by full wave diode bridge.Rectification circuit 282 can be with It is formed by a lot of other topologys, such as half-wave bridge or voltage multiplie.
Existing fluorescent lamp town device operation using being respectively used to rely on directly transmission of electricity operation power and by being connected with lamp bracket The first and second circuits 110 and 140 (Fig. 5), various advantages can be generated.In addition to the efficiency mentioned in summary of the invention above-mentioned Outside economically the advantages of, installation personnel has more more options in mounted LED lamp.Such as in schoolhouse, installation personnel can be with Fluorescent lamp ballast is changed in decision again in classroom, then directly uses power transmission line, to increase the efficiency of photoelectric conversion.In school Other regions of house, such as in the emergency lighting of small classroom or corridor, installation personnel can be determined, by existing fluorescent lamp Ballast carrys out running indicator, on the whole more economically.This is because the lamp brackets in these places only use once in a while, compared with using Existing electronic ballast for fluoresent lamp, the lamp bracket for changing these places again will be spent more.In addition, if fluorescent lamp ballast exists It breaks down when operation, the lamp bracket in ballast can be changed again, then run the same lamp from power transmission line.
In addition, the first and second circuits 110 and 140 (Fig. 5) are respectively preferably active circuit and passive circuit, these terms As previously mentioned, to allow more efficient energy above-mentioned, and more broadly stable operation.Especially each circuit can carry out excellent Change, is most effectively worked by respective power supply.
Figure 12 illustrates alternative circuit 1200 in the LED light 102 of Fig. 1-4 above-mentioned.The electricity of circuit 1200 and Fig. 5 Road 200 has similar elements, and Ref. No. having the same.Primary difference is that second circuit 140 is only used for one Divide the LED power supply accessed by node 1202 and 1204.Node 1202 can be located at other positions, such as the top of LED300.Phase As, node 1204 can be located at other positions, such as the bottom of LED300.In the isolation LED power 220 or Figure 11 using Figure 10 Non-isolated LED power 250 come when implementing the first circuit 110, the value of capacitor 242 (Figure 10) or capacitor 258 (Figure 11) is answered It selects as follows.The value of aforementioned capacitor 242 or 258 should contact the value of the electrolytic condenser 324 of Figure 12 to make a choice, with LED running frequency provides enough power storages, to generate acceptable low flicker level.
By allowing second circuit 140 only to be powered to a part by the LED300 that the first circuit 110 is powered, the designer of circuit Both can select only optimization one between the first and second circuits 110 and 140 to a greater degree or optimize simultaneously.
Figure 13 shows further alternative circuit 1300 in the LED light 102 of Fig. 1-4 above-mentioned.Circuit 1300 with The circuit 200 of Fig. 5 has similar elements, and Ref. No. having the same.Primary difference is that the first circuit 110 is only used In the LED power supply connected to a part by node 1302 and 1304.Node 1302 can be located at other positions, such as LED300 Top.Similarly, node 1304 can be located at other positions, such as the bottom of LED300.In the isolation LED power using Figure 10 The non-isolated LED power 250 of 220 or Figure 11 is come when implementing the first circuit 110, capacitor 242 (Figure 10) or capacitor 258 (are schemed 11) value should select as follows.The value of aforementioned capacitor 242 or 258 should contact the value of the electrolytic condenser 324 of Figure 13 to make Selection, so that enough power storages are provided with LED running frequency, to generate acceptable low flicker level.
By allowing the first circuit 110 only to be powered to a part by the LED300 that second circuit 140 is powered, the designer of circuit Both can select only optimization one between the first and second circuits 110 and 140 to a greater degree or optimize simultaneously.For example, When using electronic ballast for fluoresent lamp 122 (Fig. 3) of instantaneous starting type, it is easier to which the electric current of LED300 is led in limitation.This is Because voltage used in from second circuit 140 to whole LED300 can be higher than from the first circuit 110 in node 1202 and 1204 Between LED300 used in voltage.
For example, as the first circuit 110 of Fig. 5, the first circuit 110 of Figure 11 and Figure 12 can by Figure 10 every It is realized from LED power 220 or the non-isolated LED power 250 of Figure 11.
Figure 14 shows further alternative circuit 1400 in the LED light 102 of Fig. 1-4 above-mentioned.Circuit 1400 There is similar elements, and Ref. No. having the same with the circuit 200 of Fig. 5, Figure 12 and Figure 13.Primary difference is that no It is to allow the first and second circuits 110 and 140 all only to power to LED300, and the first circuit 110 is only powered to LED301, the second electricity Road 140 only powers to LED302.The variation of above-mentioned LED300 setting is also applied for LED301 and 302.This is just completely eliminated State worry, it may be assumed that when the first circuit is connected to transmission of electricity electric power by the first and second power pins 104 and 106, transmission of electricity electric power passes through The predetermined running of second circuit 140 and the first circuit 110 of interference.
By allow the first circuit 110 of Figure 14 give LED301 power supply, allow second circuit 140 give LED302 power supply, circuit Designer can selection only optimizes one or optimizes the two simultaneously between the first and second circuits 110 and 140 to a greater degree. For example, when using electronic ballast for fluoresent lamp 122 (Fig. 3) of instantaneous starting type, it is easier to which the electric current of LED302 is led in limitation. This is because can be higher than from the first circuit 110 from the voltage that second circuit 140 is used for LED302 and be used for LED301 Voltage.
First conduction control member can be functional
Referring to Fig. 5, Fig. 8-9 and Figure 12-14, the first conduction control member 350 is preferred to play one or more following functions:
(1) second circuit is allowed to run.First conduction control member 350 can be used as capacitor to realize, for example, with aforementioned Ballast frequency it is conductive." permission " second circuit operation herein refers to, provides necessary but non-enough modes and allows the second electricity Road 140 is run.In addition, the second conduction control member 370 is also required to that second circuit is allowed to run, in other words, first and second are passed It is necessary for leading control member 350 and 370, and needs to be enough to make second circuit 140 to run.
(2) allow second circuit to run, but do not interfere the first circuit.First conduction control member 350 can also play permission Second circuit 140 is run, but does not interfere the function of the predetermined running of the first circuit 110；Namely when the first circuit passes through first When being connected to power delivery circuit with second source pin 104 and 106.In order to realize this function, conduction control member 350 is configured as Capacitor or positioned at switch when it is disconnected, to draw when the operation of the first circuit 110 to from power transmission line by second source The electric current conduction of the rectification circuit 282 of foot 106 and second circuit 140 to LED300 are limited.Compared with individually with the first circuit The average canbdle power of the 110 similar LED generated, it is this to prevent the first or second of LED300 from the current limit of power transmission line Great deviation of light.If adding imaginary lock 266 and 268 to the circuit of Fig. 5, Figure 12 and Figure 13, the first circuit 110 will be transported individually Row.It is contemplated that following two deviation of light:
A) LED300 is at 0.1 hertz to the flicker type deviation of light in 200 frequency ranges；And
B) the sustained deviation of light of LED300.
First great flicker type and sustained deviation of light account for 10%.In order to by irritating flicker type and sustained deviation of light It minimizes, the second great flicker type and sustained deviation of light account for 5%.Luminous intensity is measured widely to calculate optical flare Know, can use the light that photocell constantly measures light source sending.
(3) electric current of limitation driving LED.First conduction control member 350 can further limit driving according to the actual situation The electric current of LED300.It is shown with transmission frequency than with aforementioned town when the first conduction control member 350 is realized as capacitor The bigger impedance of device frequency is flowed, so as to complete this function.From transmission frequency in the range of 0 to 500 hertz, and ballast Device frequency may determine that transmission frequency is more much lower than ballast frequency in 20 kilo hertzs and the above facts.
(4) allow to reach Danger Electric shock risk protection.First conduction control member 350 (and second conduction control member of collaboration) The 4th possible function be, when similar lamp 102 (Fig. 1-2) be mounted personnel be inserted into the fluorescent lamp holder in Fig. 1-2 (such as: when 100,115), allowing to reduce the Danger Electric shock risk of possible threat to life.Figure 15 is shown to get an electric shock for LED light 102 The setting 1500 of danger experiment, the setting is the same as the setting for carrying out similar experiment described in UL1583c standard, with reference to UL935 standard It is similar.There are the first and second power pins 105 and 106 in 102 one end of lamp, and there are the third and fourth power pins 124 in another opposite end With 126.The lamp holder 1510 of double pin linear fluorescent lamps includes the first and second power contacts 1511 and 1512.Alternatively, power supply touches Point 1511 and 1512 any power contact all can serve as electricity folder invest it is any in power pins 104,106,124 and 126 On power pins.The power transmission line electricity that first power contact 1511 of lamp holder 1510 is connected to voltage source 1520 to guarantee and need Press corresponding alternating voltage.Voltage source 1520 can provide a voltage range, by 1520 tag mark of voltage source Arrow indicates.The second source contact 1512 of lamp holder 1510 is connected to the transmission of electricity neutral conductor of the ground connection of voltage source 1520.It is another A lamp holder 1530 can be located on the equipment 1535 comprising lamp holder 1510, but the lamp holder is not used in current experiment.With Intend the bus voltage powered to the first circuit 110 and frequency carries out every experiment.For LED retrofit lamp, this refers mainly to electricity The voltage range for the voltage that voltage source 1520 provides be alternating voltage root-mean-square value from 110 to 277 and 50 or 60 hertz Supply frequency.When necessary, experiment can carry out on the fixed voltage of the independent power transmission line supply voltage to suit the requirements.Has ability The personnel of domain common technology means generally know about other transmission of electricity supply voltages of needs, such as alternating voltage root-mean-square value 347 Or 480.This will only confirm any transmission of electricity supply voltage specifically installed for LED light 102.
In Danger Electric shock risk experiment, for following every kind of situation, the first and second conduction control members 350 and 370 can be made To be exposed to the capacitor or be located at disconnected that outer power pins 104,106,124 and 126 are configured to each of LED light 102 Switch under open state realizes, thus by being directly connected to aforementioned each be exposed to outer power pins through electric probe 1540 (circuit includes the first and second series elements 1550 and 1555 to circuit between ground connection, wherein first element 1550 includes simultaneously The 1500 ohm of noninductive resistors and 0.22 microfarad capacitor of connection, second element 1555 include 500 ohm of noninductive resistor) When measuring, it is more than default milliampere root-mean-square value to transmission frequency, beyond any required supply voltage range, frequency is 50 hertz Hereby the electric current conduction (I=V/R, Figure 15) with 60 hertz is prevented:
(1) first and second power pins 104 and 106 are inserted into lamp holder 1510, so that the first power pins 104 are connected to electricity Second source pin 106 is connected to power contact 1512, and electric probe 1540 is connected to power pins 124 by source contact 1511；
(2) first and second power pins 104 and 106 are inserted into lamp holder 1510, so that the first power pins 104 are connected to the Second source pin 106 is connected to second source contact 1512, and electric probe 1540 is connected to the 4th electricity by one power contact 1511 Source pin 126；
(3) first and second power pins 124 and 126 are inserted into lamp holder 1510, so that third power pins 124 are connected to the 4th power pins 126 are connected to second source contact 1512, and electric probe 1540 are connected to the first electricity by one power contact 1511 Source pin 104；
(4) first and second power pins 124 and 126 are inserted into lamp holder 1510, so that third power pins 124 are connected to the 4th power pins 126 are connected to second source contact 1512, and electric probe 1540 are connected to the second electricity by one power contact 1511 Source pin 106；
(5) first and second power pins 106 and 104 are inserted into lamp holder 1510, so that second source pin 106 is connected to the First power pins 104 are connected to second source contact, and electric probe are connected to third power pins by one power contact 1511 124；
(6) first and second power pins 106 and 104 are inserted into lamp holder 1510, so that second source pin 106 is connected to the First power pins 104 are connected to second source contact 1512, and electric probe 1540 are connected to the 4th electricity by one power contact 1511 Source pin 126；
(7) first and second power pins 126 and 124 are inserted into lamp holder 1510, so that second source pin 126 is connected to the Third power pins 124 are connected to second source contact 1512, and electric probe 1540 are connected to the first electricity by one power contact 1511 Source pin 104；
(8) first and second power pins 126 and 124 are inserted into lamp holder 1510, so that the 4th power pins 126 are connected to the Third power pins 124 are connected to second source contact 1512, and electric probe 1540 are connected to the second electricity by one power contact 1511 Source pin 106.
It is any in the first conduction control member and the second conduction control member 350 and 370 when being realized using capacitor When component, can according to described in leading portion and back segment (two sections of beginnings be " (2) limitation driving LED electric current.") optimum selecting electricity The value of container further limits electric current.
For alternating voltage root-mean-square value range within the scope of supply voltage above-mentioned be 110 to 277 in any voltage value, When frequency is 50 hertz and 60 hertz, presetting maximum root mean square milliampere value can be 10.Default maximum milliampere root mean square Value also preferable lower value, for example when frequency is 50 hertz and 60 hertz be 5.The meaning that each value represents is as shown in the table:
Famous American researcher charles Dalziel is ground using the mankind of health as experimental subjects by experiment Varying strength electric current is studied carefully to body effect, has obtained aforementioned data.By UL, (namely American insurance quotient tries circuit described in leading portion Test institute) it is used to stimulate the electric current of manpower, manpower touches LED etc. and is exposed to outer conductive circuit, and then people is same is grounded it Between just form path.Default milliampere root-mean-square value be 10 actually should lower than cause women " have a pain, and voluntary muscle not by The threshold value of control ", leaves the difference of 0.5 milliampere of root-mean-square value due to safety concerns.In contrast, causing the similar reaction of male Threshold value is higher (i.e. 16 milliamperes of root mean square).It loses extremely dangerous to the control of voluntary muscle, for example, it is likely to result in lamps and lanterns Installation personnel is thrown from 3 meters of high ladders.What lower default milliampere root-mean-square value 5 as U.S. UL was selected is 60 in frequency When hertz, meet the current value of U.S.'s UL1598c standard, U.S.'s UL1598c standard is formulated by UL, it is intended to be reduced aforementioned to LED The Danger Electric shock risk of the possibility threat to life of lamp installation personnel.From upper table as it can be seen that default milliampere root-mean-square value 5, which is lower than, causes " have pain The threshold value of sense, and voluntary muscle is still controllable " reaction, thus it is desirable.
Aforementioned UL1598s standard requirements, it is necessary to 60 hertz of frequency, and will be generated with electronic ballast for fluoresent lamp Frequency is tested.As previously mentioned, such ballast variable ratio frequency changer, general variable frequency range is 20 kilo hertzs to 100 kilo hertzs.Such as aforementioned table The next two columns data of lattice are relatively more shown, and frequency is higher, and the electric current that human body can be born is also higher.Because if frequency is higher than aforementioned 50 hertz or 60 hertz, the electric current that human body can be born can also improve, thus UL1598c provide, if such as frequency be 25,000 It is conspicuous, allow electric current to be also much higher than current demand values above-mentioned, about 59 milliamperes of root mean square；If frequency is 50 kilo hertzs, allow electric current It can reach 120 milliamperes of root mean square or so.
Second conduction control member can be functional
Referring to Fig. 5, Fig. 8-9 and Figure 12-14, the second conduction control member 370 is preferred to play one or more following functions:
(1) second circuit is allowed to run.For example, the second conduction control member 370 can be used as capacitor to realize conduction.This " permission " at place is consistent with the definition in the first conduction control member function (1).
(2) allow second circuit to run, but do not interfere the first circuit.Second conduction control member 370 can also play permission Second circuit 140 is run, but does not interfere the function of the predetermined running of the first circuit 110；Namely when the first circuit passes through first When being connected to power delivery circuit with second source pin 104 and 106.In order to realize this function, conduction control member 370 is configured as Capacitor or positioned at switch when it is disconnected, for example, passing through third power supply to from power transmission line when the operation of the first circuit 110 The electric current conduction of the rectification circuit 282 of pin 124 and second circuit 140 to LED300 are limited.For example, when utilizing Fig. 2's When fluorescent lamp holder 115, transmission of electricity electric power is supplied to third power pins 124.It is generated compared with individually with the first circuit 110 similar The average canbdle power of LED, this deviation of light for preventing the first or second of LED300 great from the current limit of power transmission line. If adding imaginary lock 266 and 268 to the circuit of Fig. 5, Fig. 8-9 and Figure 12-13, the first circuit 110 is by isolated operation.It needs to consider To following two deviation of light:
A) LED300 is at 0.1 hertz to the flicker type deviation of light in 200 frequency ranges；And
B) the sustained deviation of light of LED300.
First great flicker type and sustained deviation of light account for 10%.In order to by irritating flicker type and sustained deviation of light It minimizes, the second great flicker type and sustained deviation of light account for 5%.Luminous intensity is measured widely to calculate optical flare Know, can use the light that photocell constantly measures light source sending.
(3) electric current of limitation driving LED.Second conduction control member 370 can further limit driving according to the actual situation The electric current of LED300.It is shown with transmission frequency than with fluorescence lamp electronic when the second conduction control member 370 is as capacitor The bigger impedance of 122 frequency of ballast, so as to complete this function.From transmission frequency in the range of 0 to 500 hertz, And ballast frequency may determine that in 10 kilo hertzs and the above facts, transmission frequency is more much lower than ballast frequency.
(4) allow to reach Danger Electric shock risk protection.One possible function of the second conduction control member 370 is, when similar Lamp 102 (Fig. 1-4) is mounted personnel and is inserted into fluorescent lamp holder (such as: when 100,115,120 or 130 in Fig. 1-4), allowing to reduce The Danger Electric shock risk of possible threat to life.In order to realize the purpose, the second conduction control member 370 configuration can be controlled with the first conduction Component cooperation processed, referring in above-mentioned paragraph from " (4) allow to reach Danger Electric shock risk protection " by " the second conduction control member can have Paragraph between function " title.
Danger Electric shock risk protection is provided --- other technologies
The aforementioned permission Danger Electric shock risks of the first and second conduction control members 350 and 370 are anti-in Fig. 5, Figure 12-13 and Figure 14 The possibility function of shield, can also be realized by other methods.For example, being not isolated from LED power (for example, in Figure 11 compared with utilizing 250) it, can use isolating transformer 382 (Fig. 8) or use isolated power supply (for example, 220 in Figure 10), will instead of the former Second conduction control member 370 is as capacitor or switch to realize.It can not also run in the opposite direction with the teachings of the present invention In the case of, and gather multiple components for avoiding transmission of electricity power contacts any " being exposed to outer power pins "." it is exposed to outer electricity Source pin " is identical as the meaning inquired into the prevention of electric shock function of the first and second conduction control members 350 and 370.
The Table List of the embodiment 1-13 of first and second conduction control members
Figure 16 shows the embodiment 1-13 Table List of the first and second conduction control members.The Table List includes one Column indicates isolation and the non-isolation type of the first circuit 110 required shown in Fig. 5, Fig. 8-9, Figure 12 and Figure 13.The grid column Another column of table refers to fluorescent lamp holder 100 (Fig. 1) corresponding with each embodiment, 115 (Fig. 2), 120 (Fig. 3) or 130 (Fig. 4).It is referred in each example there are also a column, which powers to LED to shine along the length of LED light 102 When bright, it is to share above-mentioned LED, does not still share above-mentioned LED.Circuit 200 (Fig. 5), 380 (Fig. 8), 390 (Fig. 9), 1200 (figures 12) and 1300 (Figure 13) share LED between the first and second circuits 110 and 140, and circuit 1400 (Figure 14) is not in the first He LED is shared between second circuit 110 and 140.
Embodiment 1-13
Following first conduction control function may be implemented according to following table for whole embodiments 1-13 shown in Figure 16:
The implementation of first conduction control member 350 The function of first conduction control member 350
Capacitor 352 (1)–(4)
Switch 354 (1)-(2) and (4)
Short circuit current 358 (1)
If this field is widely known, capacitor 352 can be more broadly known as capacitor." capacitor " this wider range of term Contain the capacitor for reaching requirement using multiple capacitors.
Following second conduction control function may be implemented according to following table for whole embodiments 1-13 shown in Figure 16:
The implementation of second conduction control member 370 The function of second conduction control member 370
Capacitor 374 (1)–(4)
Switch 376 (1)-(2) and (4)
Short circuit current 372 (1)
The short circuit current 352 and 358 of first and second conduction control members 350 and 370 includes in phrase used herein In " conduction control member ".However, but always conductive in terms of " control " of short circuit current 352 and 358.This just with switch " control " is contrasted, and switch both can be connected or be not turned on.
In addition, the short circuit current 352 of the first conduction control member 350 needs to be able to achieve second source pin 106 and second Conduction between circuit 140.Similarly, the short circuit current 358 of the second conduction control member 370 needs to be able to achieve third power supply and draws Conduction between foot 124 and second circuit 140.
For whole embodiment 1-13, according to following table, Table List that will referring to Fig.1 in 6, content therein is herein It repeats no more.For whole embodiment 1-13, needs to sound a warning to product packaging etc., illustrate only turning off to fluorescent lamp The installation and dismounting of lamp can be just carried out when the transmission of electricity power supply of lamp bracket.
Embodiment 1-2 and 11-13 may be unable to reach inquire into above the first and second electric currents conduction control member 350 or The possibility function of 370 Danger Electric shock risk protection.This is because 1,2 and 11-13 of embodiment makees the first conduction control member 350 For the realization of short circuit current 358.So there is these embodiments, it is above-mentioned sound a warning to product packaging etc. it is just particularly important.
About the embodiment 9 and 10 for the circuit 1400 for all referring to Figure 14, Figure 16 shows the first and second conduction control structure Two kinds of part 350 and 370 may combine.Or, for example, the first and second conduction control members 350 and 370 of Figure 14 are also It can be by implementing with Figure 16 with regard to the same way shown in embodiment 5-8.
About embodiment 5-10, although more preferably also can be used using less expensive the first circuit of non-isolation type 110 More expensive the first circuit of isolated form 110.
Referring to Fig.1 1, embodiment 11 is using the first and second conduction control members 350 and 370 as short circuit current 358 It is realized with 372.By avoiding providing the fluorescent lamp of transmission of electricity electric power to all four power pins 104,106,124 and 126 Frame 115 (Fig. 2), and by allowing LED power to show as isolated form in the first circuit 110, it can achieve following advantages: either The first circuit 110 is not interfered in the flicker type interference or sustained interference, second circuit 140 inquired into above.
Embodiment 12 has used a kind of isolated form LED power in the first circuit 110, and avoids electric power of transmitting electricity using offer To the fluorescent lamp holder 115 (Fig. 2) of all four power pins 104,106,124 and 126, to reach following advantages: either The first circuit 110 is not interfered in the flicker type interference or sustained interference, second circuit 140 inquired into above.
The embodiment that first and second conduction control members 350 and 370 are realized as short circuit current 358 and 372 In 13, the LED that dependence does not share has reached following advantages when powering to above-mentioned LED to illuminate along the length of LED light 102: The first circuit 110 is not interfered in the flicker type interference or sustained interference, second circuit 140 either inquired into above.
Referring to Fig.1 6, switch 354 and 376 can be implemented in a variety of manners.They may be constructed mechanical switch, and make It is preferably that two switches are mechanically coupled to each other according to dotted line 400 in the embodiment 8 switched with two, to control a switch Just control two switches.This mechanical switch is referred to as bipolar single-way switch.Switch 354 and 376 is also configured as such as The electric switch of field effect transistor, such as in no power for not on-state.
For the sake of safety, need any switch for realizing first or second conduction control member 350 or 370 to installation Personnel's setting is in an open state or not on-state.Once lamp is installed into fluorescent lamp holder 100 (Fig. 1) by installation personnel confirmation Or 115 (Fig. 2), switch should stay open.In contrast, once lamp is installed into fluorescent lamp holder 120 by installation personnel confirmation (Fig. 3) or 130 (Fig. 4), then switch should close.
As described in when inquired into data above, when the LED300 in the circuit 200 of Fig. 5 is realized as is seen in fig. 6 or fig. 7, it can drop The specification and price of capacitor 352 and 357 shown in low Figure 16.
It is Ref. No. used in the specification and drawings and corresponding list of parts below:
Ref. No. Component
100 Fluorescent lamp holder
102 LED light
104 First power pins
105 Power contact
106 Second source pin
107 Power contact
108 Electric short circuit
109 Power supply
110 First circuit
115 Fluorescent lamp holder
120 Fluorescent lamp holder
122 Electronic ballast for fluoresent lamp
123 Electronic ballast for fluoresent lamp
124 Third power pins
125 Power contact
126 4th power pins
127 Power contact
128 Electric short circuit
130 Fluorescent lamp holder
140 Second circuit
200 Circuit
220 Isolated power supply
222 Output end
224 Output end
228 Isolating transformer
230 Full-wave rectifying circuit
232 Field effect transistor
233 Grid
240 Flyback diode
242 Capacitor
250 Non-isolated power supply
252 Field effect transistor
253 Grid
254 Capacitor
256 Inductor
258 Capacitor
260 Diode
262 Feed-through capacitor
264 Feed-through capacitor
264 Feed-through capacitor
265 Feed-through capacitor
266 Imaginary lock
268 Imaginary lock
282 Rectification circuit
300 LED
301 LED
302 LED
303 LED circuit
304 LED circuit
306 Node
307 Node
308 Node
310 Node
311 Node
312 Node
314 Turn to diode
315 Turn to diode
316 Turn to diode
317 Turn to diode
318 Turn to diode
319 Turn to diode
320 Turn to diode
321 Turn to diode
324 Electrolytic capacitor
325 Blocking diode
326 LED circuit unit
327 LED circuit unit
328 Turn to diode
329 Turn to diode
330 Turn to diode
331 Turn to diode
332 Turn to diode
333 Turn to diode
334 Turn to diode
335 Turn to diode
337 Interface field effect transistor
338 Body diode
349 First conductor
340 Biasing circuit
341 Feed-through capacitor
342 Interface field effect transistor
343 Body diode
344 Second conductor
345 Biasing circuit
346 Feed-through capacitor
350 First conduction control member
352 Capacitor
354 Switch
358 Short circuit current
6370 Second conduction control member
372 Short circuit current
374 Capacitor
376 Switch
380 Circuit
382 Isolating transformer
390 Circuit
392 Auto-transformer
394 Conductor
400 It is electrically coupled or mechanical couplings
1200 Circuit
1202 Node
1204 Node
1300 Circuit
1302 Node
1304 Node
1400 Circuit
1500 Setting
1510 Lamp holder
1511 First power contact
1512 Second source contact
1520 Voltage source
1530 Connector
1535 Device
1540 Electric probe
1550 Element
1555 Element
Described above is one kind can be adapted into the LED light in existing fluorescent lamp holder, and has double operation mode, By the existing electronic ballast for fluoresent lamp power supply being connected with lamp bracket, or can also directly be powered from power transmission line.Advantageous aspect It is that can configure LED light, when the LED light is installed into the lamp bracket of wiring to be directly powered from power transmission line, to reduce possibility The Danger Electric shock risk of threat to life.Some embodiments of lamp of the invention, which are configured as providing to the people of installation lamp, prevents electric shock more More protections.
The scope of the claims should not be limited by preferred embodiment and example, and it is whole to give same printed instructions The consistent maximum magnitude of body is interpreted.

Claims (20)

1. a kind of LED light with double operation mode provides transmission of electricity electric power by the fluorescent lamp holder of wiring, or by electricity The alternating current of sub-ballast offer ballast frequency, comprising:
A) thin-long casing having a first end and a second end；
B) first end of the thin-long casing is provided with the first and second power pins；
C) second end of the thin-long casing is provided with third power pins；
D) the first circuit is used to intend being powered in the first mode at least one, and shine outward along the length of thin-long casing LED provides main electric power；When LED light is inserted into the fluorescent lamp holder with power contact, the power contact receives the first He Second source pin, and it is directly connected to power transmission line, when obtaining the transmission frequency power supply lower than ballast frequency, that is, occur first Mode；The electric current of quasi- at least one LED being powered in the first mode is led in the limitation of first circuit；
E) second circuit is at least one quasi- LED for being powered, and shining outward in a second mode along the length of thin-long casing Main electric power is provided；When LED light is inserted into the fluorescent lamp holder with power contact, the power contact receives opposite positioned at lamp Second and the third power pins at end, and when being directly connected to the electric ballast to obtain electric power from it, that is, the second mould occurs Formula；Second circuit includes the rectification circuit that electric power is received from second and third power pins；
F) the first conduction control member is connected between second source pin and rectification circuit, when second and third of lamp opposite end When power pins are connected to the electric ballast, to allow second circuit to be that at least one intends being powered in a second mode LED power supply；And
G) the second conduction control member is connected between third power pins and rectification circuit, when second and third of lamp opposite end When power pins are connected to the electric ballast, to allow second circuit to be that at least one intends being powered in a second mode LED power supply.
2. LED light as described in claim 1, in which:
A) described at least one quasi- LED being powered in the first mode and it is described at least one quasi- be powered in a second mode LED has at least one identical LED；And
B) it is powered in fact when the operation of the first circuit is directly connected to power transmission line by the first and second power pins with transmission frequency Now, the first conduction control member prevents the interference level of transmission of electricity electric power from reaching second circuit by second source pin； When flicker type and sustained deviation of light are intended leading in the first circuit-mode generated when the first circuit is used alone at least one When the average light intensity of the LED of electricity compares, the interference level of the transmission of electricity electric power is quasi- in the first mode by least one With at least 10% flicker type deviation of light of the LED to power in 0.1 hertz to 200 frequency ranges and at least one intend the At least 10% sustained deviation of light of the LED to power in one mode defines.
3. LED light as described in claim 1, in which:
A) described at least one quasi- LED being powered in the first mode and it is described at least one quasi- be powered in a second mode LED has at least one identical LED；And
B) it is powered in fact when the operation of the first circuit is directly connected to power transmission line by the first and second power pins with transmission frequency Now, the second conduction control member prevents the interference level of transmission of electricity electric power from reaching second circuit by third power pins； When flicker type and sustained deviation of light are intended leading in the first circuit-mode generated when the first circuit is used alone at least one When the average light intensity of the LED of electricity compares, the interference level of the transmission of electricity electric power is quasi- in the first mode by least one With at least 10% flicker type deviation of light of the LED to power in 0.1 hertz to 200 frequency ranges and at least one intend the At least 10% sustained deviation of light of the LED to power in one mode defines.
4. LED light as claimed in claim 3, in which:
A) described at least one quasi- LED being powered in the first mode and it is described at least one quasi- be powered in a second mode LED has at least one identical LED；And
B) transformer is coupled between the rectification circuit of second circuit and the first and second conduction control member；
C) compared with when transformer transformation ratio is 1:1, the transformation ratio that the transformer has reduces the second circuit operation The levels of current that second mode gives at least one LED light to power.
5. LED light as claimed in claim 4, wherein transformer is isolating transformer.
6. LED light as claimed in claim 4, wherein transformer is auto-transformer.
7. LED light as described in claim 1, wherein be directed to following every kind of situation, the first and second conduction control members can By configuring when the circuit by being directly connected between selected power pins and ground connection through probe is to measure, and in LED When the selected power pins of lamp are connected to the first and second power contacts, to default square more than being run with 50 hertz and 60 hertz Root be 10 milliamperes transmission frequency electric current conduction is prevented, the circuit include the first and second series elements, first Element includes in parallel 1500 ohm of noninductive resistors and 0.22 microfarad capacitor, and second element includes 500 ohm noninductive Resistor, wherein first power contact is changed by a fixed voltage, or in the voltage range for meeting transmission voltage Voltage, or intend to aforementioned first circuit power voltage be responsible for power supply；
A) the first power pins are connected to the first power contact, and second source pin is connected to second source contact, and probe is connected to third Power pins；
B) the first power pins are connected to the first power contact, and second source pin is connected to second source contact, and probe is connected to the 4th Power pins；
C) third power pins are connected to the first power contact, and the 4th power pins are connected to second source contact, and probe is connected to first Power pins；
D) the first power pins are connected to the first power contact, and the 4th power pins are connected to second source contact, and probe is connected to second Power pins；
E) second source pin is connected to the first power contact, and the first power pins are connected to second source contact, and probe is connected to third Power pins；
F) second source pin is connected to the first power contact, and the first power pins are connected to second source contact, and probe is connected to the 4th Power pins；
G) the 4th power pins are connected to the first power contact, and third power pins are connected to second source contact, and probe is connected to first Power pins；And
H) the 4th power pins are connected to the first power contact, and third power pins are connected to second source contact, and probe is connected to second Power pins.
8. LED light as claimed in claim 7, wherein configuration the first and second conduction control member, it is aforementioned default equal to realize Root value is 5 milliamperes.
9. LED light as described in claim 1, wherein first circuit is active circuit, and the second circuit is passive electrical Road.
10. LED light as described in claim 1, wherein the quantity of at least one quasi- LED being powered in the first mode is more than The quantity of at least one quasi- LED being powered in a second mode.
11. LED light as described in claim 1, wherein the quantity of at least one quasi- LED being powered in a second mode is more than The quantity of at least one quasi- LED being powered in the first mode.
12. LED light as described in claim 1, in which:
A) first circuit include an isolating transformer, positioned to receive transmission of electricity electric power input terminal at least one The quasi- LED being powered in the first mode is provided between the output end of modulation electric power；And
B) isolating transformer prevents transmission of electricity electric power to pass through the second circuit when running the first mode and prevents dry Disturb first circuit.
13. LED light as described in claim 1, in which:
A) first and second circuit is configured, to make at least one quasi- LED being powered in the first mode and at least One quasi- LED being powered in the second mode is separated from each other；And
B) second circuit is configured to avoid it is intended at least one in the first mode in first mode operation The LED of middle energization powers.
14. LED light as described in claim 1, in which:
A) described at least one quasi- LED being powered in the first mode and it is described at least one quasi- be powered in a second mode LED has multiple identical LED, and forms a plurality of LED, and every LED at least has a LED；
B) LED circuit is for being arranged a plurality of LED；LED circuit includes one for being arranged in a plurality of LED at least first and second The first LED circuit unit of LED, so that every LED at least first and second LED is when from the first power on circuitry, Between all have roughly equal voltage；
C) the first LED circuit unit is configured, thus when passing through the first power on circuitry, at least first and second LED energy Parallel running, so that every LED has roughly equal voltage therebetween；And
D) the first LED circuit unit is further configured, thus when being powered by second circuit, described at least first and second LED series operation, to be substantially equal to by the voltage that second circuit is supplied at least first and second LED across institute State the summation of the voltage of every LED of at least first and second LED respectively.
15. LED light as claimed in claim 14 allows described at least first wherein the first LED circuit includes turning to diode With Article 2 LED parallel running when from the first circuit series-fed, and from second circuit power when series operation.
16. LED light as claimed in claim 14, in which:
A) LED circuit includes one for the second LED circuit list of at least first and second difference LED in a plurality of LED to be arranged Member, so that every LED at least first and second difference LED when from the first power on circuitry, has substantially phase therebetween Deng voltage；
B) the second LED circuit unit is configured, thus when passing through the first power on circuitry, at least first and second differences LED parallel running, so that every LED has roughly equal voltage therebetween；And
C) the second LED circuit unit is further configured, thus when being powered by second circuit, aforementioned at least first and second Different LED series operations, to be substantially equal to by the voltage that second circuit supplies at least first and second difference LED Across the summation of every LED voltage respectively of aforementioned at least first and second differences LED.
17. the LED light as described in claim 14 or 16, in which:
A) the first circuit is connected to LED circuit by the first and second conductors；And
B) the respective insulating element of one at least one conductor series connection in the first and second conductors are provided, in aforementioned LED Keep apart when the quasi- energization from second circuit by the first circuit and from the monopolar current that aforementioned LED circuit unit comes.
18. LED light as described in claim 17, wherein the respective insulating element includes a field effect transistor.
19. LED light as claimed in claim 17, in which:
A) provide with the respective insulating element of first conductor series connection, with aforementioned LED is quasi- be powered from second circuit when by the One circuit and the monopolar current next from aforementioned LED circuit unit are kept apart；And
B) provide with the respective insulating element of second conductor series connection, with aforementioned LED is quasi- be powered from second circuit when by the One circuit and the monopolar current next from aforementioned LED circuit unit are kept apart.
20. LED light as claimed in claim 19, wherein the respective insulating element includes a field-effect transistor.
CN201510556679.7A 2014-10-20 2015-09-02 Dual-mode operation LED light Active CN105530737B (en)

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US201462066306P 2014-10-20 2014-10-20
US62/066,306 2014-10-20
US14/555,294 US20160113076A1 (en) 2014-10-20 2014-11-26 Led lamp with dual mode operation
US14/555,294 2014-11-26
CN2015100075873 2015-01-07
CN201510007587 2015-01-07
US14/702,591 US9557044B2 (en) 2014-10-20 2015-05-01 LED lamp with dual mode operation
US14/702,591 2015-05-01
CN201510556679.7A CN105530737B (en) 2014-10-20 2015-09-02 Dual-mode operation LED light

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CN106231724B (en) * 2016-08-02 2018-03-16 陕西亚成微电子股份有限公司 A kind of LED is without stroboscopic adjusting control circuit
CN108463021B (en) * 2017-02-17 2020-03-06 朗德万斯公司 General improved generation LED fluorescent tube and lighting system
CN109587866B (en) 2017-09-28 2021-06-18 朗德万斯公司 Electronic driver for LED lighting module and LED lamp

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