CN206332874U

CN206332874U - LED straight lamps

Info

Publication number: CN206332874U
Application number: CN201621194725.XU
Authority: CN
Inventors: 熊爱明; 刘新通; 吴晓佳; 张跃强; 王才华; 胡赫尘
Original assignee: Jiaxing Super Lighting Electric Appliance Co Ltd
Current assignee: Jiaxing Super Lighting Electric Appliance Co Ltd
Priority date: 2015-10-29
Filing date: 2016-10-31
Publication date: 2017-07-14
Anticipated expiration: 2026-10-31
Also published as: CN206332874U8

Abstract

A kind of LED straight lamps, including fluorescent tube, rectification circuit, LED illumination module and ballast compatible circuit.Fluorescent tube has at least two pins, to receive external drive signal.Rectification circuit carries out rectification to the external drive signal to reception.LED illumination module includes LED module, and the LED illumination module is to luminous.Ballast compatible circuit is coupled between the pin and the LED illumination module, the ballast compatible circuit includes circuit for detecting, whether the circuit for detecting is high frequency or high-voltage signal to the external drive signal according to the external drive signal detection, when the external drive signal is high frequency or high-voltage signal, the ballast compatible circuit turns on LED module.

Description

LED straight lamps

Technical field

The utility model is related to field of lighting appliances, and in particular to a kind of LED (light-emitting diode) straight tube Lamp and its light source design, electronic building brick and holder structure.

Background technology

LED illumination technology is positive fast-developing and instead of traditional incandescent lamp and fluorescent lamp.Compared to being filled with indifferent gas For the fluorescent lamp of body and mercury, LED straight lamps need not filling mercury.Therefore, various by seeming traditional fluorescent bulbs and lamp In family expenses or the illuminator of workplace that the illumination option such as pipe is dominated, LED straight lamps are it is hardly surprising that be increasingly becoming people Height expect illumination option.The advantage of LED straight lamps is comprising the durability and life-span lifted and compared with low power consuming.Therefore, Consider after all factors, LED straight lamps would is that the illumination option of escapable cost.

Due to traditional existing longer time of incandescent lamp and fluorescent lamp, its matching connection has ballast.With people The consciousness of energy-conservation is improved, and LED illumination instead of traditional incandescent lamp and fluorescent lamp, reach common understanding by shape from now on.Using rectification at present The occasion of device is a lot, and LED straight lamps how friendly compatible existing different types of whole need to be considered when being substituted for LED straight lamps Ballast becomes more urgent.In the prior art, LED lamp device in the presence of some compatible fluorescent lamp ballasts, existing The circuit design of LED straight lamps, for meeting the specification of correlation and the driving of electric ballast being used with existing fluorescent lamp Between the compatibility of framework, fail to provide appropriate solution.

Commercially available common electric ballast is mainly divided into instantaneous starting type (Instant Start) electric ballast, pre- Two kinds of thermal starting type (Program Start) electric ballast.Electric ballast has resonance circuit, and it drives design and daylight Lamp load characteristic matching, i.e., electric ballast fluorescent lamp before lighting be capacitive component, and after lighting be resistive group Part allows fluorescent lamp correctly to light there is provided corresponding startup program.And LED is non-linear component, the spy with fluorescent lamp Property is entirely different.Therefore, LED straight lamps can influence the resonance of electric ballast to design, and cause compatibility issue.Asked for this Topic, Publication No. CN 205640347U Chinese utility model patent case, disclosing can friendly compatible instantaneous starting type electronics town Flow the technical scheme of the electric ballasts such as device, preheating start-up type electric ballast, quick-starting direct electric ballast.

Then when some IS types electric ballasts are matched, existing in low-voltage when 120V (line voltage be less than) can not be into The phenomenon that work(starts.When being matched with some IS types electric ballasts, LED straight lamps can produce resonance with electric ballast, and this is humorous The noise human ear of initiation of height wave amplitude of shaking can hear.

So in addition to electric ballast, also Inductive ballast, the driving that Inductive ballast is exported are being used in certain areas The level and frequency of signal are different from the drive signal that electric ballast is exported；Therefore, the LED for being compatible to electric ballast is straight Spot may be incompatible in Inductive ballast, and causes compatibility issue.In addition, it is above current source that electric ballast is equivalent, As the DC-DC converter of LED straight lamps power supply when, easily cause overcurrent-overvoltage, thus cause electronic building brick to damage Or LED straight lamps can not stablize offer illumination.

Come again, LED drivings drive signal used is direct current signal, but the drive signal of fluorescent lamp is the low of civil power Frequently, the high frequency of low-voltage ac signal or electric ballast, high-voltage AC signal, or even during applied to Emergency Light, Emergency Light Battery be direct current signal.Voltage, frequency range drop between different driving signal is big, and not simple progress rectification can be simultaneous Hold.

In view of above mentioned problem, the application and embodiment set forth below.

The content of the invention

Many embodiments of the summary description herein on " the application ".But the vocabulary " the application " is used merely to description The some embodiments (in spite of in claim) disclosed in this description, rather than all possible embodiment Complete description.Some embodiments of each feature or aspect for being described below as " the application " can merge by different way with Form a LED straight lamps or a portion.

The application provides a kind of new LED straight lamps, and its various aspects (with feature), is asked with solving above-mentioned refer to Topic, greatly raising LED straight lamps are compatible with electric ballast, Inductive ballast etc., while can be in line voltage just Often start LED straight lamps, the noise that ballast triggers with the Wave crest and wave trough of LED straight lamp resonance can be eliminated.To achieve the above object, The following technical scheme of the application sampling：

A kind of LED straight lamps, it is characterised in that include：Fluorescent tube, with least two pins, to receive external drive letter Number；Rectification circuit, carries out rectification to produce rectified signal to the external drive signal to reception；LED illumination module, bag Containing LED module, the LED illumination module is to luminous；And ballast compatible circuit, it is coupled to the pin and the LED illumination Between module, the ballast compatible circuit is included:Circuit for detecting, the circuit for detecting to detect the external drive signal or The rectified signal, foundation simultaneously judges whether the external drive signal is high frequency or high-voltage signal, when external drive letter Number be high frequency or high-voltage signal when, the ballast compatible circuit turns on LED module.Pass through the design of such scheme, the circuit The friendly compatible various ballasts of energy.

It is preferred that, above-mentioned ballast compatible circuit is also included, switching switch, is coupled to the circuit for detecting, the detecting electricity Road is coupled to switching switch comprising voltage decision circuitry, and the voltage decision circuitry is according to the electrical level judging institute of the rectified signal State whether external drive signal is high-voltage signal to produce judged result, the switching switch according to judged result conducting or Cut-off, wherein, the switching switch conduction turns on LED module, and the switching switch cut-off makes LED module open a way.By this The design of sample circuit, the application can also compatible inductive type ballast well.

It is preferred that, above-mentioned circuit for detecting includes sampling branch road, and the ballast compatible circuit is also comprising control circuit and switching Switch, it is described to control circuit to be coupled between sampling branch road and switching switch, the sampling branch road sampling rectified signal Level, the control circuit judges whether the signal of sampling is high-voltage signal according to sampled result, and controls the switching switch On or off, wherein, the switching switch conduction turns on the LED module, and the switching switch cut-off makes the LED moulds Block is opened a way.By the design of such circuit, the application can compatible inductive type ballast well.

It is preferred that, above-mentioned ballast compatible circuit also comprising switching switch, is coupled to the circuit for detecting, the circuit for detecting Switching switch is coupled to comprising frequency decision circuitry, the frequency decision circuitry judges according to the frequency of the external drive signal Whether the external drive signal is high-frequency signal to produce judged result, and the switching switch is turned on according to the judged result Or cut-off, wherein, the switching switch conduction turns on LED module, and the switching switch cut-off makes LED module open a way.

It is preferred that, said external drive signal is low-voltage ac signal in original state, after the delayed time, described outer Portion's drive signal is changed into high-frequency high-voltage signal by low-voltage ac signal.

It is preferred that, when the level that above-mentioned circuit for detecting detects the rectified signal is higher than high decision level, the outside Drive signal is high-frequency high-voltage signal；When the level that the circuit for detecting detects the rectified signal be located at high decision level with it is low When between the scope of decision level, the ballast compatible circuit makes LED module open a way；When the circuit for detecting detects the rectification letter Number level be less than the low decision level when, the ballast compatible circuit turns on LED module；Wherein described high decision level Higher than the low decision level.

It is preferred that, said external drive signal comes from Inductive ballast, and the level of the rectified signal is less than described low Decision level.

It is preferred that, above-mentioned LED straight lamps, also comprising electric capacity and/or resistance, one end of the fluorescent tube have the first pin with Second pin, the electric capacity and/or resistance are coupled between first pin and second pin.Pass through such circuit Design, the application proposes a plan can also compatibility PS type electric ballasts well.

It is preferred that, above-mentioned LED straight lamps are also coupled to an at least pin for the first end of the fluorescent tube comprising current limiting element And an at least pin at the second end of the fluorescent tube, and the current limiting element is coupled to the rectification circuit, the current limiting element Receive the external drive signal.

It is preferred that, above-mentioned circuit for detecting is coupled between rectification circuit and the LED module comprising thyratron, when described outer Portion's drive signal is high frequency or high-voltage signal, the thyratron conducting, otherwise the thyratron cut-off.Pass through setting for such circuit Meter, can normally start the LED straight lamps of the application proposition in electrical network low voltage, moreover it is possible to reduce LED straight lamps and electronics town Flow the noise that device resonance triggers.

It is preferred that, above-mentioned ballast compatible circuit also includes transistor, inductance and resistance, the collector coupling institute of the transistor The negative terminal of LED module is stated, the inductance and the thyratron are series at the negative terminal of the LED module and the base stage of the transistor Between, the emitter-base bandgap grading of the transistor couples the rectification circuit, the resistance be coupled to the transistor base stage and emitter-base bandgap grading it Between, after the thyratron is turned on, flow through the shunting of the inductance and flow through the shunting maintenance thyratron of the transistor Conducting state.By the design of such circuit, the noise that LED straight lamps trigger with electron rectifier resonance can be reduced.

It is preferred that, above-mentioned ballast compatible circuit also includes the collector of transistor described in electric capacity, one end coupling of electric capacity, the other end Couple the base stage of the transistor.By the design of such circuit, the compatibility with IS type electron rectifiers can be improved.

It is preferred that, above-mentioned LED straight lamps, also comprising lamp plate and circuit board, the lamp plate is arranged at the interior of the fluorescent tube On surface, the circuit board is placed in the lamp holder of one end of the fluorescent tube, and the lamp plate or the circuit board include two pads, The patch capacitor of the LED straight lamps is arranged at the lamp plate or the circuit board, two welding by two pad The lamp plate or the circuit board between point include slotted eye.Pass through the design of such circuit, it is possible to decrease with electric ballast Timing, the arcing risk that electric ballast output high pressure triggers.

It is preferred that, above-mentioned LED straight lamps, also comprising filter circuit and overvoltage crowbar, the filter circuit coupling In the rectification circuit to be filtered to rectification circuit to produce filtering signal, and two output ends of the filter circuit are distinguished The anode and negative terminal of the LED module are coupled to, the overvoltage crowbar includes switching switch and resistance, the resistance and institute State switching switch to be series between two output ends of the filter circuit, the switching switchs the level according to the filtering signal Conducting.

It is preferred that, above-mentioned circuit for detecting is comprising frequency decision circuitry, the frequency to detect the external drive signal, and Whether judge the external drive signal is high frequency ac signal；When the external drive signal is high frequency ac signal, institute Stating ballast circuit for detecting makes external drive signal be flowed through via the external circuit of the circuit for detecting or the ballast circuit for detecting LED illumination module, otherwise makes external drive signal flow through the LED illumination after bypassing the circuit for detecting or the external circuit Module.By the design of such circuit, the LED straight lamps that the application is proposed can good compatible electronic ballast, inductance ballast Device, or it is operated in shunt ballast device state.

It is preferred that, above-mentioned ballast circuit for detecting, also comprising the in parallel circuit for detecting of switching circuit, the switching circuit by Control in circuit for detecting, when the signal is high frequency ac signal, the switching circuit cut-off makes the external drive signal stream Through the external circuit or switching circuit circuit in parallel, the otherwise switching circuit conducting believes the external drive Number bypass the external circuit or switching circuit circuit in parallel.

It is preferred that, above-mentioned LED illumination module also includes drive circuit, to drive the LED module, the compatible electricity of the ballast Road, also comprising mode switching circuit, the circuit for detecting produces control signal according to the frequency of the external drive signal, to control Mode switching circuit processed is first mode or second mode；The mode switching circuit in the flrst mode, makes the driving electricity Road receives the rectified signal to drive LED module；The mode switching circuit under the second mode, believes the external drive At least part component of number bypass drive circuit is to drive LED module.

It is preferred that, above-mentioned ballast compatible circuit also includes switching circuit, and the frequency decision circuitry is according to the outside drive Switching circuit on or off described in the FREQUENCY CONTROL of dynamic signal, when the external drive signal is high frequency ac signal, institute Switching switch cut-off is stated, otherwise the switching switch conduction.

It is preferred that, said frequencies decision circuitry is coupled to the pin to produce electricity according to external drive signal comprising electric capacity Pressure；When the external drive signal is high-frequency signal, the low-voltage that the electric capacity is produced makes switching switch cut-off；When described outer When portion's drive signal is low frequency signal or direct current signal, the high voltage that the electric capacity is produced makes switching switch conduction.

It is preferred that, said frequencies decision circuitry includes the first inductance and the second inductance of mutual inductance, the first inductance coupling In the pin to second inductance, to make the mutual inductance of external drive signal second inductance to produce voltage；When described outer When portion's drive signal is high-frequency signal, the high voltage that second inductance is produced makes switching switch cut-off；When the external drive When signal is low frequency signal or direct current signal, the low-voltage that second inductance is produced makes switching switch conduction.

It is preferred that, above-mentioned LED straight lamps, it is characterised in that also comprising electric capacity and/or resistance, one end tool of the fluorescent tube There are the first pin and the second pin, the electric capacity and/or resistance are coupled between first pin and second pin.It is logical Cross the design of such circuit, the scheme that the application is proposed can also compatibility PS type electric ballasts well.

It is preferred that, above-mentioned LED straight lamps, it is characterised in that also comprising lamp plate and circuit board, the lamp plate is arranged at described On the inner surface of fluorescent tube, the circuit board is placed in the lamp holder of described fluorescent tube one end, and the lamp plate or the circuit board are included Two pads, the patch capacitor of the LED straight lamps is arranged at the lamp plate or the circuit board, institute by two pad The lamp plate or the circuit board stated between two pads include slotted eye.

It is preferred that, the frequency of above-mentioned high frequency ac signal is between 20KHz between 50KHz.

Beneficial effect

The scheme for the LED straight lamps that the application is proposed, the friendly compatible all types of electrical ballast of energy；Simultaneously can also Friendly compatible inductive type ballast；It can also be used under the occasion of dc source or civil power.

Brief description of the drawings

Fig. 1 is a stereogram, shows the LED straight lamps of the embodiment of the application one；

Fig. 2 is a three-dimensional exploded view, shows Fig. 1 LED straight lamps；

Fig. 3 is a section plan, and the lamp plate for showing the LED straight lamps of the embodiment of the application one is bendable circuit soft board And its end gets over the transition part of fluorescent tube and is welded to connect with the output end of power supply；

Fig. 4 is a stereogram, shows the bendable circuit soft board and electricity of the lamp plate of another embodiment LED straight lamps of the application The printed circuit board (PCB) in source is combined into a circuit board assemblies；

Fig. 5 is a stereogram, shows another configuration of Fig. 4 circuit board assemblies；

Fig. 6 A are that the application circuit square of the power supply module of the LED straight lamps according to the preferred embodiment of the application first is illustrated Figure；

Fig. 6 B are that the application circuit square of the power supply module of the LED straight lamps according to the preferred embodiment of the application second is illustrated Figure；

Fig. 6 C are the circuit box schematic diagram of the LED according to the preferred embodiment of the application first；

Fig. 6 D are that the application circuit square of the power supply module of the LED straight lamps according to the preferred embodiment of the application the 3rd is illustrated Figure；

Fig. 6 E are the circuit box schematic diagram of the LED according to the preferred embodiment of the application second；

Fig. 7 A are the circuit diagram of the rectification circuit according to the preferred embodiment of the application first；

Fig. 7 B are the circuit diagram of the rectification circuit according to the preferred embodiment of the application second；

Fig. 7 C are the circuit diagram of the rectification circuit according to the preferred embodiment of the application the 3rd；

Fig. 7 D are the circuit diagram of the rectification circuit according to the preferred embodiment of the application the 4th；

Fig. 8 A are the circuit diagram of the end points change-over circuit according to the preferred embodiment of the application first；

Fig. 8 B are the circuit diagram of the end points change-over circuit according to the preferred embodiment of the application second；

Fig. 8 C are the circuit diagram of the end points change-over circuit according to the preferred embodiment of the application the 3rd；

Fig. 8 D are the circuit diagram of the end points change-over circuit according to the preferred embodiment of the application the 4th；

Fig. 9 A are the application circuit block schematic diagram of the power supply module of the LED according to the preferred embodiment of the application the 3rd；

Fig. 9 B are the circuit box schematic diagram of the drive circuit according to the preferred embodiment of the application first；

Fig. 9 C are the circuit diagram of the drive circuit according to the preferred embodiment of the application first；

Figure 10 A are the application circuit block schematic diagram of the power supply module of the LED according to the preferred embodiment of the application the 5th；

Figure 10 B are the circuit diagram of the protection circuit according to the preferred embodiment of the application one；

Figure 11 A are the application circuit block schematic diagram of the power supply module of the LED according to the preferred embodiment of the application the 6th；

Figure 11 B are the circuit diagram of the mode switching circuit according to the preferred embodiment of the application first；

Figure 11 C are the circuit diagram of the mode switching circuit according to the preferred embodiment of the application second；

Figure 11 D are the circuit diagram of the switching judging circuit of the LED according to the preferred embodiment of the application first；

Figure 11 E are the circuit diagram of the switching judging circuit of the LED according to the preferred embodiment of the application second；

Figure 12 A are the application circuit block schematic diagram of the power supply module of the LED according to the preferred embodiment of the application the 7th；

Figure 12 B are the application circuit block schematic diagram of the power supply module of the LED according to the preferred embodiment of the application the 8th；

Figure 12 C are the circuit configuration schematic diagram of the ballast compatible circuit according to the application preferred embodiment；

Figure 12 D are the application circuit block schematic diagram of the power supply module of the LED according to the preferred embodiment of the application the 9th；

Figure 12 E are the application circuit block schematic diagram of the power supply module of the LED according to the preferred embodiment of the application the tenth；

Figure 12 F are the circuit diagram of the ballast compatible circuit according to the preferred embodiment of the application first；

Figure 12 G are the application circuit square of the power supply module of the LED straight lamps according to the preferred embodiment of the application the 11st Schematic diagram；

Figure 12 H are the circuit diagram of the ballast compatible circuit according to the preferred embodiment of the application second；

Figure 12 I are the circuit diagram of the ballast compatible circuit according to the preferred embodiment of the application the 4th；

Figure 12 J are the circuit diagram of the ballast circuit for detecting according to the preferred embodiment of the application first；

Figure 12 K are the circuit diagram of the ballast circuit for detecting according to the preferred embodiment of the application second；

Figure 12 L are the circuit diagram of the ballast circuit for detecting according to the preferred embodiment of the application the 3rd；

Figure 12 M are the circuit diagram of the ballast circuit for detecting according to the preferred embodiment of the application the 4th；

Figure 12 N are the circuit diagram of the ballast circuit for detecting according to the preferred embodiment of the application the 5th；

Figure 12 O are the circuit diagram of the ballast compatible circuit according to the preferred embodiment of the application the 5th；

Figure 12 P are electricity when conducting state according to the thyratron of the ballast compatible circuit of the preferred embodiment of the application the 5th Flow oscillogram；

Figure 13 A are the application circuit square of the power supply module of the LED straight lamps according to the preferred embodiment of the application the 15th Schematic diagram；

Figure 13 B are the circuit diagram of the filament artificial circuit according to the preferred embodiment of the application first；

Figure 13 C are the circuit diagram of the filament artificial circuit according to the preferred embodiment of the application second；

Figure 14 A are the application circuit square of the power supply module of the LED straight lamps according to the preferred embodiment of the application the 16th Schematic diagram；

Figure 14 B are the circuit diagram of the overvoltage crowbar according to the preferred embodiment of the application first；

Figure 14 C are the circuit diagram of the overvoltage crowbar according to the preferred embodiment of the application second；

Figure 15 A are the application circuit square of the power supply module of the LED straight lamps according to the preferred embodiment of the application the 17th Schematic diagram；

Figure 15 B are the application circuit square of the power supply module of the LED straight lamps according to the preferred embodiment of the application the 18th Schematic diagram；

Figure 15 C are the circuit box schematic diagram of the ballast circuit for detecting according to the preferred embodiment of the application the 6th；

Figure 15 D are the circuit diagram of the ballast circuit for detecting according to the preferred embodiment of the application the 7th；

Figure 15 E are the circuit diagram of the ballast circuit for detecting according to the preferred embodiment of the application the 8th.

Embodiment

The application is on the basis of glass lamp, it is proposed that a kind of new LED straight lamps, to solve to mention in background technology The problem of and above mentioned problem.It is understandable to enable the above-mentioned purpose of the application, feature and advantage to become apparent, with reference to attached Figure is described in detail to the specific embodiment of the application.The narration of following each embodiment of the application merely to explanation and exemplified by Show, be not meant as the whole embodiments of the application or the application is limited to specific embodiment.

Fig. 1 and Fig. 2 are refer to, the application provides a kind of LED straight lamps in an embodiment, and it includes：One fluorescent tube 1, one Lamp plate 2 in fluorescent tube 1, and it is respectively arranged on two lamp holders 3 at the two ends of fluorescent tube 1.Fluorescent tube 1 can using plastics fluorescent tube or Glass lamp, the size of the lamp holder is identical or different.

In one embodiment, the fluorescent tube 1 of LED straight lamps is using the glass lamp for having reinforced structure, to avoid traditional glass Lamp is easily rupturable and rupture because of electric leakage the problem of trigger electric shock accidents, and the problem of plastic lantern easy aging.The application is each In embodiment, chemical mode or physics mode can be used to do secondary operation reinforcing to glass system fluorescent tube 1.

It is to improve glass with the composition of glass surface is changed to make the general principle strengthened to glass using chemical mode Intensity, its method is to be exchanged with other alkali metal ions with the Na ions or K ions of surface layer of glass, and surface forms ion Switching layer, after normal temperature is cooled to, glass is in internal layer tension, the compressed state of outer layer, so as to reach the mesh of increase intensity , including but not limited to high temperature modification ion-exchange, low form ion-exchange, dealkalize method, surface crystallization method, sodium metasilicate reinforcing Method etc..

It refer to Fig. 2, the glass lamp of the LED straight lamps proposed in the embodiment of the application one has structure-reinforced end Portion, is described as follows.Glass system fluorescent tube 1 includes body zone 102 and is located at the end region 101 at the two ends of body zone 102 respectively, covers respectively Lamp holder outside end region 101.The external diameter of at least one end region 101 is less than the external diameter of body zone 102.In one embodiment, The external diameter of lamp holder 3 and the external diameter of body zone 102 are of substantially equal, and tolerance is the no more than positive and negative 1mm in positive and negative 0.2mm (millimeter). In order to reach the external diameter of lamp holder 3 and the of substantially equal purpose of the external diameter of body zone 102, according to the thickness of different lamp holders 3, after reinforcing The difference range of end region 101 and the external diameter of body zone 102 can be 1mm to 10mm；Or preferably, the end region after reinforcing 101 can be relaxed to 2mm to 7mm with the difference range of the external diameter of body zone 102.

In other embodiments, a power supply slot (not shown) for being used to install power supply module is included in lamp holder.

Continue referring in Fig. 2, the embodiment of the application one, LED straight lamps also include bonding agent piece 4, lamp plate insulation film 7 With light source film 8.Lamp plate 2 is pasted on by bonding agent piece 4 on the inner peripheral surface of fluorescent tube 1.Shown in figure, bonding agent piece 4 can be Silica gel, its form is not limited, and can be several sections shown in figure, or in one section of strip.Various forms of bonding agent pieces 4, The difference that various forms of lamp plate insulation films 7 and various forms of light source films 8 can each other combine and constitute the application is implemented Example.

In the present embodiment, lamp plate 2 is fixed on the inner peripheral surface of fluorescent tube 1 by bonding agent piece 4 so that lamp plate 2 is sticked in fluorescent tube 1 Inner peripheral surface on, can so increase the lighting angle of whole branch LED straight lamps, expand angle of visibility, so setting can typically make Obtaining angle of visibility can be more than 330 degree.By applying lamp plate insulation film 7 in lamp plate 2, the light source film of insulation is applied on light source 202 8, the insulation processing to whole lamp plate 2 is realized, so, even if fluorescent tube 1 ruptures, will not also occur electric shock accidents, improve security.

Further, lamp plate 2 can be any one in strip aluminium base, FR4 plates or bendable circuit soft board.By In the present embodiment fluorescent tube 1 be glass lamp, if lamp plate 2 use rigid strip aluminium base or FR4 plates, then work as fluorescent tube Rupture, such as after breaking in two, whole fluorescent tube is still able to remain the state of straight tube, and at this moment user is possible to will be considered that LED straight lamps can also use and go voluntarily to install, and be easily caused electric shock accidents.Because bendable circuit soft board is with stronger Pliability and flexible characteristic, solve the situation of rigid strip aluminium base, FR4 plates pliability and bendability deficiency, therefore The lamp plate 2 of the present embodiment uses bendable circuit soft board, so after fluorescent tube 1 ruptures, i.e., the fluorescent tube 1 of rupture can not be supported to continue Straight tube state is remained, to inform that user LED straight lamps can not be used, it is to avoid the generation of electric shock accidents.Therefore, when adopting After bendable circuit soft board, the electric shock problem caused because glass tube is broken can be alleviated to a certain extent.Following reality Example is applied i.e. using bendable circuit soft board as lamp plate 2 to explain.

Fig. 2 is continued referring to, lamp plate 2, which is provided with some light sources 202, lamp holder 3, is provided with power supply 5, light source 202 and power supply 5 Between pass through the electrical communication of lamp plate 2.In each embodiment of the application, power supply 5 can (i.e. all power supply modules be all integrated for single body In a part), and in the lamp holder 3 of the one end of fluorescent tube 1；Or power supply 5 can also be divided into two parts, it is referred to as double individuals (i.e. all power supply modules are separately positioned in two parts), and two parts are respectively arranged in the lamp holder 3 of lamp tube ends.If Fluorescent tube 1 only has one end when making strengthening section processing, and power supply prioritizing selection is single body, and the end region 101 after reinforcing pair In the lamp holder 3 answered.

Either single body or double individuals, the generation type of power supply can have Mutiple Choice, for example, power supply can be A kind of module after embedding shaping, specifically, using a kind of silica gel of high heat conduction (thermal conductivity factor >=0.7w/mk), passes through mould Tool carries out embedding shaping to power supply module, obtains power supply, and the power supply that this mode is obtained has high insulation, high radiating, profile more The advantage of rule, and easily can coordinate with other structures part.Or, power supply can also be not make embedding gum forming, directly Exposed power supply module is inserted inside lamp holder, or after exposed power supply module is encased with traditional heat-shrink tube, then insert lamp Inside first 3.

Fig. 2 is refer to, the electric connection between the power supply 5 and lamp plate 2 of any pattern can also use conventional wires routing side Formula replaces above-mentioned male plug and female plug 201, i.e., using a traditional plain conductor, one end of plain conductor and power supply are electrically connected Connect, the other end is electrically connected with lamp plate 2.Further, plain conductor can coat an insulating sleeve to protect user from electric shock. But it is slightly worse in the problem of mode of wire routing connection is possible to have fracture in transportation, quality.

In other embodiment, the electric connection between power supply 5 and lamp plate 2 can pass through rivet nail joint, tin cream gluing, welding Or be directly linked together in the way of wire is bundled.It is consistent with the fixed form of foregoing lamp plate 2, bendable circuit soft board A side surface inner peripheral surface of fluorescent tube 1 is bonded and fixed to by bonding agent piece 4, and the two ends of bendable circuit soft board can be selected Fix or be not fixed on the inner peripheral surface of fluorescent tube 1.

If the two ends of bendable circuit soft board are fixed on the inner peripheral surface of fluorescent tube 1, pay the utmost attention in bendable circuit Female plug 201 is set on soft board, the male plug insertion female plug 201 of power supply 5 is then realized into electrical connection.

If two ends of the lamp plate 2 along the axial direction of fluorescent tube 1 are not fixed on the inner peripheral surface of fluorescent tube 1, if connected using wire, It is follow-up move during, because two ends are free, easily shaken during follow-up move, thus make it possible to wire It is broken.Therefore lamp plate 2 and the connected mode prioritizing selection of power supply 5 are welding.Specifically, reference picture 3, can be directly by lamp Plate 2 got over and be welded in after the transition region of strengthening section structure in the output end of power supply 5, removes the use of wire from, improves product quality Stability.Now lamp plate 2 need not set female plug 201, and the output end of power supply 5 is also without setting male plug.

Fig. 4 and Fig. 5 are refer to, the lamp plate 2 and power supply 5 fixed through welding manner can be with being equipped with power supply module 250 Circuit board group component 25 replace.Circuit board group component 25 has a short circuit board 253 of long circuit board 251 and one, long circuit board 251 and short circuit board 253 fit fix through gluing mode each other, short circuit board 253 is located at the long adjacent peripheral edges of circuit board 251. There is power supply module 25 on short circuit board 253, power supply is monolithically fabricated.The short longer circuit board 251 of the material of circuit board 253 is hard, with up to To the effect of Power Support module 250.

Long circuit board 251 can be above-mentioned bendable circuit soft board or flexible base board as lamp plate 2, and with circuit Layer.The mode of line layer and power supply module 250 electrical connection of lamp plate 2 can have different electric connection modes according to actually used situation. As shown in figure 4, the line layer being electrically connected with power supply module 250 is all located at into short electricity on power supply module 250 and long circuit board 251 The same side of road plate 253, power supply module 250 is directly electrically connected with long circuit board 251.As shown in figure 5, the He of power supply module 250 The circuit series of strata being electrically connected with power supply module 250 are located to the both sides of short circuit board 253, power supply respectively on long circuit board 251 Module 250 penetrates the line layer electrical connection of too short circuit board 253 and lamp plate 2.

As shown in figure 4, in one embodiment, circuit board group component 25 eliminates lamp plate 2 and power supply 5 in previous embodiment and wanted Situation about being fixed with the mode of welding, but first fix long circuit board 251 and the gluing of short circuit board 253, then by power supply module 250 and lamp plate 2 line layer electrical connection., can be with addition, lamp plate 2 is not limited in one layer or double layer circuit plate as described above Include another sandwich circuit layer.Light source 202 is located at line layer, passes through line layer and the electrical communication of power supply 5.As shown in figure 5, another In embodiment, circuit board group component 25 has a short circuit board 253 of long circuit board 251 and one, and long circuit board 251 can be above-mentioned The bendable circuit soft board or flexible base board of lamp plate 2, lamp plate 2 include a line layer and a dielectric layer, first by dielectric layer and short electricity Road plate 253 is affixed with connecting method, afterwards, then line layer is attached on the dielectric layer and extended on short circuit board 253.More than Each embodiment, all without departing from the application of the application circuit board group component 25.

In the various embodiments described above, the length of short circuit board 253 is about 15 millimeters to 40 millimeters, preferably 19 millimeters to 36 Millimeter, the length of long circuit board 251 can be 800 millimeters to 2800 millimeters, preferably 1200 millimeters to 2400 millimeters.Short circuit board 253 and long circuit board 251 ratio can be 1:20 to 1:200.

In addition, in the foregoing embodiments, when lamp plate 2 and power supply 5 are to be fixed through welding manner, the end of lamp plate 2 On the inner peripheral surface for being not secured to fluorescent tube 1, it is impossible to which safe fixation supports power supply 5, in other embodiments, if power supply 5 must Must separately it be fixed in the lamp holder of the end region of fluorescent tube 1, then lamp holder can be relatively long and have compressed the effective light-emitting area of fluorescent tube 1.

Next the circuit design of explanation power supply module 250 and application.

Fig. 6 A are referred to, are the application circuit of the power supply module of LED straight lamps according to the preferred embodiment of the application first Block schematic diagram.AC power 508 is to provide ac supply signal.AC power 508 can be civil power, voltage range 100-277V, frequency is 50 or 60Hz.Lamp tube drive circuit 505 receives the ac supply signal of AC power 508, and is converted into Alternating current drive signal is with as external drive signal.Lamp tube drive circuit 505 can be electric ballast, to by the letter of civil power Number converted high frequency, the alternating current drive signal of high pressure.The species of common electronicses ballast, for example：Instantaneous starting type (Instant Start) electric ballast, preheating start-up type (Program Start) electric ballast, quick-starting direct (Rapid Start) electric ballast etc., the LED straight lamps of the application are applicable.The voltage of alternating current drive signal is more than 300V, Preferable voltage range is 400-700V；Frequency is more than 10kHz, and preferable frequency range is 20k-50kHz.LED straight lamps 500 are received External drive signal, in the present embodiment, external drive signal are the alternating current drive signal of lamp tube drive circuit 505, and are driven It is dynamic luminous.In the present embodiment, LED straight lamps 500 are the driving framework of single ended power supply, and same one end lamp holder of fluorescent tube has first Pin 501, the second pin 502, to receive external drive signal.First pin 501 of the present embodiment, the coupling of the second pin 502 (that is, electrical connection or direct or indirect connection) is connect to lamp tube drive circuit 505 to receive alternating current drive signal.

It is worth noting that, lamp tube drive circuit 505 is omissible circuit, therefore indicated in the drawings with dotted line.When When lamp tube drive circuit 505 is omitted, AC power 508 is coupled with the first pin 501, the second pin 502.Now, the first pin 501st, the second pin 502 receives the ac supply signal that AC power 508 is provided, with as external drive signal.

In addition to the application of above-mentioned single ended power supply, the LED straight lamps 500 of the application can also be applied to both-end list pin Circuit structure.Fig. 6 B are referred to, are the application electricity of the power supply module of LED straight lamps according to the preferred embodiment of the application second Road block schematic diagram.Compared to shown in Fig. 6 A, the first pin 501, the second pin 502 are respectively placed in the fluorescent tube of LED straight lamps 500 Relative both-end lamp holder is to form each single pin of both-end, and the connection of remaining circuit and function are then identical with circuit shown in Fig. 6 A.

Then, Fig. 6 C are referred to, are the circuit box schematic diagram of the LED according to the preferred embodiment of the application first.LED The power supply module of lamp mainly includes the first rectification circuit 510 and filter circuit 520, can also include LED illumination module 530 Part component.First rectification circuit 510 couples the first pin 501, the second pin 502, to receive external drive signal, and externally Portion's drive signal carries out rectification, then exports rectified signal by the first rectification output end 511, the second rectification output end 512. This external drive signal can be the alternating current drive signal or ac supply signal in Fig. 6 A and Fig. 6 B, possibly even to be straight Signal is flowed without influenceing the operation of LED.Filter circuit 520 is coupled with first rectification circuit, to rectified signal It is filtered；I.e. filter circuit 520 couples the first rectification output end 511, the second rectification output end 512 and believe after rectification with received Number, and rectified signal is filtered, output end 522 exports filter after output end 521, second is filtered after then being filtered by first Signal after ripple.LED illumination module 530 is coupled with filter circuit 520, with signal after accepting filter and is lighted；That is LED illumination module Then output end 522 drives LED to shine with signal after accepting filter after output end 521, second is filtered after 530 the first filtering of coupling LED component (not drawing) in bright module 530 lights.This part please refer to after embodiment explanation.

It is worth noting that, in the present embodiment, the first rectification output end 511, the second rectification output end 512 and the first filter The quantity of output end 522 is two after output end 521, second is filtered after ripple, and then according to the first rectification circuit during practical application 510th, between filter circuit 520 and each circuit of LED illumination module 530 signal transmission increase in demand or reduction, i.e., between each circuit It can be one or more to couple end points.

Furthermore, each embodiment of the power supply module of the LED shown in Fig. 6 C and the power supply module of following LED, except suitable Outside for the LED straight lamps shown in Fig. 6 A and Fig. 6 B, for including the illuminating circuit framework two pins to transmit electric power, example Such as：The lamp socket of a variety of illuminating lamps such as bulb lamp, PAL lamps, intubation electricity-saving lamp (PLS lamps, PLD lamps, PLT lamps, PLL lamps etc.) Specification is applicable.

Fig. 6 D are referred to, are the application circuit of the power supply module of LED straight lamps according to the preferred embodiment of the application the 3rd Block schematic diagram.AC power 508 is to provide ac supply signal.Lamp tube drive circuit 505 receives AC power 508 Ac supply signal, and it is converted into alternating current drive signal.LED straight lamps 500 receive the exchange driving letter of lamp tube drive circuit 505 Number, and be driven to emit light.In the present embodiment, LED straight lamps 500 are both-end (each pair of pin) power supply, one end lamp holder of fluorescent tube With the first pin 501, the second pin 502, other end lamp holder has the 3rd pin 503, the 4th pin 504.First pin 501st, the second pin 502, the 3rd pin 503 and the 4th pin 504 are coupled to lamp tube drive circuit 505 and exchange drive with common reception Dynamic signal, to drive the LED component (not drawing) in LED straight lamps 500 to light.AC power 508 can be civil power, and fluorescent tube Drive circuit 505 can be stabilizer or electric ballast.

Fig. 6 E are referred to, are the circuit box schematic diagram of the LED according to the preferred embodiment of the application second.LED Power supply module mainly includes the first rectification circuit 510, the rectification circuit 540 of filter circuit 520 and second, can also include LED The part component of lighting module 530.First rectification circuit 510 couples the first pin 501, the second pin 502, to receive and whole Flow the first pin 501, the external drive signal that the second pin 502 is transmitted；The 3rd pin 503 of second rectification circuit 540 coupling, 4th pin 504, to the external drive signal received and the pin 503 of rectification the 3rd, the 4th pin 504 are transmitted.Namely Say, the power supply module of LED can be common in the first rectification output comprising the first rectification circuit 510 and the second rectification circuit 540 Hold the 511, second rectification output end 512 output rectified signal.It is whole that filter circuit 520 couples the first rectification output end 511, second Output end 512 is flowed to receive rectified signal, and rectified signal is filtered, output end 521 after then being filtered by first, The output of output end 522 filtered signal after second filtering.Output end 521, second after the filtering of the coupling of LED illumination module 530 first Then output end 522 drives LED component (the not drawing) hair in LED illumination module 530 with signal after accepting filter after filtering Light.

The power supply module of the LED of the present embodiment can be applied to Fig. 6 D Double-End Source framework.It is worth noting that, by There is the first rectification circuit 510 and the second rectification circuit 540 simultaneously in the power supply module of the LED of the present embodiment, can also answer With the single ended power supply framework to Fig. 6 A, B, (include the ac supply signal in previous embodiment to receive external drive signal, hand over Flow drive signal etc.).Certainly, in addition to the present embodiment, the power supply module of the LED of remaining each embodiment can also be applied to straight Flow the driving framework of signal.

Fig. 7 A are referred to, are the circuit diagram of the rectification circuit according to the preferred embodiment of the application first.Rectification circuit 610 be bridge rectifier, comprising the first commutation diode 611, the second commutation diode 612, the 3rd commutation diode 613 and 4th commutation diode 614, to carry out full-wave rectification to received signal.The positive pole coupling of first commutation diode 611 Second rectification output end 512, negative pole couples the second pin 502.The positive pole of second commutation diode 612 couples the second rectification output End 512, negative pole coupling pin 501.The positive pole of 3rd commutation diode 613 couples the second pin 502, and negative pole couples the first rectification Output end 511.The positive pole coupling pin 501 of commutation diode 614, negative pole couples the first rectification output end 511.

When the signal that the first pin 501, the second pin 502 are received is AC signal, the operation description of rectification circuit 610 It is as follows.When AC signal is in positive half-wave, AC signal is sequentially through the first pin 501, the rectification of commutation diode 614 and first Flow into, and sequentially flowed after the second rectification output end 512, the first commutation diode 611 and the second pin 502 after output end 511 Go out.When AC signal is in negative half-wave, AC signal is sequentially whole through the second pin 502, the 3rd commutation diode 613 and first Flow and flowed into after output end 511, and sequentially flowed out after the second rectification output end 512, the second commutation diode 612 and pin 501. Therefore, no matter AC signal is in positive half-wave or negative half-wave, it is whole that the positive pole of the rectified signal of rectification circuit 610 is respectively positioned on first Output end 511 is flowed, negative pole is respectively positioned on the second rectification output end 512.According to aforesaid operations explanation, it is whole that rectification circuit 610 is exported Signal is full wave rectified signal after stream.

When the first pin 501, the second pin 502 coupling dc source and when receiving direct current signal, the behaviour of rectification circuit 610 It is described as follows.When the first pin 501 couples the anode of dc source and the second pin 502 couples the negative terminal of dc source, Direct current signal is sequentially flowed into after the first pin 501, the rectification output end 511 of commutation diode 614 and first, and sequentially through second Flowed out after rectification output end 512, the first commutation diode 611 and the second pin 502.When the first pin 501 couples dc source Negative terminal and the second pin 502 couple dc source anode when, AC signal is sequentially through the second pin 502, the 3rd rectification two Flowed into after the rectification output end 511 of pole pipe 613 and first, and sequentially through the second rectification output end 512, the second commutation diode 612 Flowed out with after the first pin 501.Similarly, it is whole no matter how direct current signal inputs through the first pin 501, the second pin 502 The positive pole of the rectified signal of current circuit 610 is respectively positioned on the first rectification output end 511, and negative pole is respectively positioned on the second rectification output end 512。

Therefore, though the present embodiment the received signal of rectification circuit 610 be AC signal or direct current signal, Correct output rectified signal.

Fig. 7 B are referred to, are the circuit diagram of the rectification circuit according to the preferred embodiment of the application second.Rectification circuit 710 include the first commutation diode 711 and the second commutation diode 712, to carry out halfwave rectifier to received signal.The The anode of one commutation diode 711 couples the second pin 502, and negative terminal couples the first rectification output end 511.Second commutation diode 712 anode couples the first rectification output end 511, and negative terminal couples the first pin 501.Second rectification output end 512 regards actual answer With and can omit or be grounded.

Then illustrate that the operation of rectification circuit 710 is as follows.

When AC signal is in positive half-wave, AC signal is higher than second in the signal level that the first pin 501 is inputted The signal level that pin 502 is inputted.Now, the first commutation diode 711 and the second commutation diode 712 are in inverse inclined cut Only state, rectification circuit 710 stops output rectified signal.When AC signal is in negative half-wave, AC signal connects first The signal level that pin 501 is inputted is less than the signal level inputted in the second pin 502.Now, the first commutation diode 711 and Two commutation diodes 712 are in along inclined conducting state, and AC signal is defeated via the first commutation diode 711, the first rectification Go out end 511 and flow into, and flowed out by the second rectification output end 512 or another circuit or earth terminal of LED.According to aforesaid operations Illustrate, the rectified signal that rectification circuit 710 is exported is half wave rectified signal.

Fig. 7 C are referred to, are the circuit diagram of the rectification circuit according to the preferred embodiment of the application the 3rd.Rectification circuit 810 include rectification unit 815 and end points change-over circuit 541, to carry out halfwave rectifier.In the present embodiment, rectification unit 815 is Half-wave rectifying circuit, comprising the first commutation diode 811 and the second commutation diode 812, to carry out halfwave rectifier.First is whole The anode for flowing diode 811 couples the second rectification output end 512, negative terminal coupling half-wave tie point 819.Second commutation diode 812 anode coupling half-wave tie point 819, negative terminal couples the first rectification output end 511.End points change-over circuit 541 couples half-wave Tie point 819, and the first pin 501 and the second pin 502, to received the first pin 501 and the second pin 502 Signal transmission is to half-wave tie point 819.By the end points translation function of end points change-over circuit 541, rectification circuit 810 can be provided Two inputs (end points of the first pin 501 of coupling and the second pin 502) and two output end (the first rectification output ends 511 And second rectification output end 512).

Then illustrate that the operation of rectification circuit 810 in certain embodiments is as follows.

When AC signal is in positive half-wave, AC signal is sequentially through the first pin 501 (or second pin 502), end Flowed into after point change-over circuit 541, half-wave tie point 819, the second commutation diode 812 and the first rectification output end 511, and by Another circuit outflow of LED.When AC signal is in negative half-wave, AC signal is simultaneously flowed into by another circuit of LED, so Connect by the second rectification output end 512, the first commutation diode 811, half-wave tie point 819, end points change-over circuit 541 and first Pin 501 (or second pin 502) flows out afterwards.

It is worth noting that, end points change-over circuit 541 can simultaneously have comprising resistance, electric capacity, inductance or its combination At least one in function such as current limliting/pressure limiting, protection, current/voltage regulation.The explanation of these functions is referred in rear explanation.

In practical application, rectification unit 815 and end points change-over circuit 541 can be exchanged without influenceing halfwave rectifier function. Fig. 7 D are referred to, are the circuit diagram of the rectification circuit according to the preferred embodiment of the application the 4th.First commutation diode 811 Anode couple the second pin 502, the negative terminal of the second commutation diode 812 couples the first pin 501, and the first commutation diode The anode of 811 negative terminal and the second commutation diode 812 couples half-wave tie point 819 simultaneously.The coupling of end points change-over circuit 541 half Ripple tie point 819, and the first rectification output end 511 and the second rectification output end 512.When AC signal is in positive half-wave, AC signal is simultaneously flowed into by another circuit of LED, then through the second rectification output end 512 (or the first rectification output end 511), flowed out after the half-wave tie point 819 of end points change-over circuit 541, the second commutation diode 812 and the first pin 501.Work as friendship When flowing signal and being in negative half-wave, AC signal sequentially through the second pin 502, the first commutation diode 811, half-wave tie point 819, The rectification output end 511 (or second rectification output end 512) of end points change-over circuit 541 and first is flowed into afterwards, and by the another of LED Circuit flows out.

What deserves to be explained is, in the embodiment shown in Fig. 7 C and Fig. 7 D and end points change-over circuit 541 can be omitted, therefore It is indicated with dashed lines.Fig. 7 C are omitted after end points change-over circuit 541, and the first pin 501 and the second pin 502 are coupled to half-wave connection Point 819.Fig. 7 D are omitted after end points change-over circuit 541, and the first rectification output end 511 and the second rectification output end 512 are coupled to half Ripple tie point 819.

The first pin 501 and the second pin 502 of rectification circuit shown in Fig. 7 A to Fig. 7 D be changed to the 3rd pin 503 and During four pins 504, you can be used as the second rectification circuit 540 shown in Fig. 6 E.

Then Fig. 6 C, Fig. 6 E is arranged in pairs or groups to illustrate the selection and combination of the first rectification circuit 510 and the second rectification circuit 540.

First rectification circuit 510 of Fig. 6 C illustrated embodiments can use the rectification circuit 610 shown in Fig. 7 A.

The first rectification circuit 510 and the second rectification circuit 540 of Fig. 6 E illustrated embodiments can then use Fig. 7 A to Fig. 7 D In any rectification circuit, and the rectification circuit shown in Fig. 7 C and Fig. 7 D can also omit end points change-over circuit 541 without influence Rectification function needed for the operation of LED straight lamps.When the first rectification circuit 510 and the second rectification circuit 540 are from Fig. 7 B to Fig. 7 D Halfwave rectifier rectification circuit when, as AC signal is in positive half-wave or negative half-wave, the first rectification circuit 510 and second is whole Current circuit 540 one of them responsible inflow, another responsible outflow.Furthermore, the first rectification circuit 510 and the second rectification circuit 540 If Fig. 7 C or Fig. 7 D are selected simultaneously, or Fig. 7 C and Fig. 7 D each one, then the end points change-over circuit 541 of one of them can be with limit Stream/pressure limiting, protection, the function of current/voltage regulation, another end points change-over circuit 541 can be omitted.

Fig. 8 A are referred to, are the circuit diagram of the end points change-over circuit according to the preferred embodiment of the application first.End points Change-over circuit 641 includes electric capacity 642, and one end of electric capacity 642 couples the first pin 501 and the second pin 502, other end coupling simultaneously Connect half-wave tie point 819.Electric capacity 642 has equivalent impedance to AC signal.The frequency of AC signal is lower, electric capacity 642 Equivalent impedance is bigger；The frequency of AC signal is higher, and the equivalent impedance of electric capacity 642 is smaller.Therefore, the end points of the present embodiment Electric capacity 642 in change-over circuit 641 is acted on high-pass filtering.Furthermore, end points change-over circuit 641 and the LED component in LED For series connection, and with equiva lent impedance, there is current limliting, the effect of pressure limiting to LED component, can avoid LED component electric current and Cross-pressure is too high and damages LED component.In addition, by coordinating the frequency of AC signal to select the capacitance of electric capacity 642, more can be to LED Component has electric current, the effect of voltage-regulation.

It is worth noting that, end points change-over circuit 641 can additionally include electric capacity 645 and/or electric capacity 646.Electric capacity 645 1 End coupling half-wave tie point 819, the other end couples the 3rd pin 503.The one end of electric capacity 646 coupling half-wave tie point 819, the other end Couple the 4th pin 504.That is, electric capacity 645 and 646 adjusts electric capacity with half-wave tie point 819 as common connection end as electric current The coupling common connection end and the first pin 501 and the second pin 502 of electric capacity 642.Under such circuit framework, the first pin 501 and second pin 502 one of them have the electric capacity 642 and 645 connected, or the first pin 501 between the 3rd pin 503 And second pin 502 one of them have the electric capacity 642 and 646 connected between the 4th pin 504.By series connection electric capacity etc. Impedance value is imitated, AC signal is by partial pressure.Please referring also to Fig. 6 E, can be with according to the ratio of the equivalent impedance of the electric capacity of series connection The cross-pressure on the cross-pressure and filter circuit 520 and LED illumination module 530 of electric capacity 642 in the first rectification circuit 510 is controlled, The current limit of LED module of LED illumination module 530 is flowed through within a load current value, and avoids too high voltages simultaneously Damage filter circuit 520 and LED illumination module 530 and reach the effect of protection filter circuit 520 and LED illumination module 530.

Fig. 8 B are referred to, are the circuit diagram of the end points change-over circuit according to the preferred embodiment of the application second.End points Change-over circuit 741 includes electric capacity 743 and 744.One end of electric capacity 743 couples the first pin 501, other end coupling half-wave tie point 819.One end of electric capacity 744 couples the second pin 502, other end coupling half-wave tie point 819.Compared to the end points shown in Fig. 8 A Change-over circuit 641, mainly electric capacity 642 is changed to two electric capacity 743 and 744 to end points change-over circuit 741 by system.Electric capacity 743 and 744 Capacitance can with identical, the first pin 501 and the received signal size of the second pin 502 can also be regarded and as difference.

Similarly, end points change-over circuit 741 can additionally include electric capacity 745 and/or electric capacity 746, be respectively coupled to the 3rd The pin 504 of pin 503 and the 4th.Thus, any in the first pin 501 and the second pin 502 connect with the 3rd pin 503 and the 4th Any function of having the electric capacity of series connection and reach partial pressure effect and protection in pin 504.

Fig. 8 C are referred to, are the circuit diagram of the end points change-over circuit according to the preferred embodiment of the application the 3rd.End points Change-over circuit 841 includes electric capacity 842,843 and 844.Electric capacity 842 and 843 is series at the first pin 501 and half-wave tie point 819 Between.Electric capacity 842 and 844 is series between the second pin 502 and half-wave tie point 819.Under such circuit framework, electric capacity 842nd, any short circuit between 843 and 844, between the first pin 501 and the pin of half-wave tie point 819 and the second pin 502 and Electric capacity is still suffered between half-wave tie point 819 and the still effect of current limiting.Therefore, occur for user's false touch LED During electric shock, excessive current can be avoided to flow through human body and cause user to get an electric shock and injure.The capacitance of electric capacity 843,844 is preferably electricity Hold the half of 842 capacitance.

Similarly, end points change-over circuit 841 can additionally include electric capacity 845 and/or electric capacity 846, be respectively coupled to the 3rd The pin 504 of pin 503 and the 4th.Thus, any in the first pin 501 and the second pin 502 connect with the 3rd pin 503 and the 4th Any function of having the electric capacity of series connection and reach partial pressure effect and protection in pin 504.

Partial pressure on the electric capacity 645 and 646, electric capacity 745 and 746 and electric capacity 845 and 846 of above-described embodiment, which is preferably, to be less than 500V, for example：100-500V scope, more preferably less than 400V, for example：300-400V scope.

Fig. 8 D are referred to, are the circuit diagram of the end points change-over circuit according to the preferred embodiment of the application the 4th.End points Change-over circuit 941 includes fuse 947,948.The one end of fuse 947 couples the first pin 501, other end coupling half-wave connection Point 819.The one end of fuse 948 couples the second pin 502, other end coupling half-wave tie point 819.Thereby, when the first pin 501 And any electric current flowed through of the second pin 502 be higher than fuse 947 and 948 rated current when, fuse 947 and 948 will Accordingly fuse and open a way, thereby reach the function of overcurrent protection.

Certainly, the first pin 501 and the second pin 502 in the embodiment of above-mentioned end points change-over circuit are changed to the 3rd pin 503 and the 4th pin 504 (and the 3rd pin 503 and the 4th pin 504 are changed to the first pin 501 and the second pin 502), i.e., It can convert to the second rectification circuit 540.

The capacitance of electric capacity in above-mentioned end points change-over circuit embodiment is preferably between 100pF~100nF.Separately Outside, the electric capacity of two or more that electric capacity can be in parallel or series carrys out equivalent substitution.For example：Electric capacity 642,842 can use two Capacitances in series is replaced.The capacitance of one of 2 electric capacity can be chosen from the range of 1.0nF~2.5nF, preferably choose 1.5nF；Another is selected from 1.5nF~3.0nF scope, preferably chooses 2.2nF.

In one embodiment, LED straight lamps also include current limiting element, and current limiting element has to LED component current limliting, pressure limiting Effect, can avoid the electric current and cross-pressure of LED component too high and damage LED component.Current limiting element is coupled to the first end of fluorescent tube An at least pin and fluorescent tube the second end an at least pin between, for example, being coupled to the first pin 501 and the 3rd pin Between 503, or between the second pin 502 and the 4th pin 504.Also, current limiting element is coupled to rectification circuit, such as first The rectification circuit 540 of rectification circuit 510 or second.It is coupled to current limiting element between the first pin 501 and the first rectification circuit 510 Exemplified by, the external drive signal that current limiting element can be received pin 501 carries out pressure limiting or current limliting, and by after pressure limiting or current limliting The first rectification circuit of external drive signal input 510 further carries out rectification；Or, current limiting element also can be by the first rectification circuit 510 rectified signals produced are exported again after further carrying out pressure limiting or current limliting.

Current limiting element can include electric capacity, for example, current limiting element can be realized as the Single Capacitance 642 shown in Fig. 8 A, Or connected and 645 or 646 realized by electric capacity 642, or by electric capacity 645 and even electric capacity 646 is realized；Or, current limiting element also may be used 743 realized as being connected again after the shunt capacitance 746 of electric capacity 745 shown in Fig. 8 B, or by being gone here and there again after the shunt capacitance 746 of electric capacity 745 Connection 744 is realized.In addition, Fig. 7 C and Fig. 8 A, Fig. 8 B and Fig. 8 C are referred to, it is similar, one of Fig. 8 A, Fig. 8 B's and Fig. 8 C Any electric capacity in circuit is coupled to any diode and the first pin 501 and the second pin 502 in the circuit with Fig. 7 C Between (or the 3rd pin 503 and the 4th pin 504), therefore any or whole electric capacity in Fig. 8 A, Fig. 8 B and Fig. 8 C can be with Used as the EMI electric capacity of filter unit, and reach the function of the electromagnetic interference of reduction circuit.It is, in Fig. 6 C and Fig. 6 E The first rectification circuit 510 can be half-wave rectifying circuit and comprising two poles of rectification two, one of two commutation diodes Anode connect another negative terminal formation half-wave tie point, any or whole electric capacity in Fig. 8 A, Fig. 8 B and Fig. 8 C is coupled to two The half-wave tie point and described two pins of individual commutation diode at least one；Or and Fig. 6 E in the second rectification circuit 540 can be half-wave rectifying circuit and comprising two poles of rectification two, and the anode connection of one of two commutation diodes is another Negative terminal formation half-wave tie point, any or whole electric capacity in Fig. 8 A, Fig. 8 B and Fig. 8 C is coupled to two commutation diodes Half-wave tie point and the 3rd pin and the 4th pin at least one.

Fig. 9 A are referred to, are the application circuit square of the power supply module of LED according to the preferred embodiment of the application the 3rd Schematic diagram.Compared to shown in Fig. 6 E, the power supply module of the LED of the present embodiment includes the first rectification circuit 510 and the second rectification Circuit 540, filter circuit 520, drive circuit 1530, wherein drive circuit 1530 and LED module 630 constitute LED illumination module 530.Drive circuit 1530 is DC-to-DC switching circuit, the first filtering output end 521 of coupling and the second filtering output end 522, with signal after accepting filter, and it is defeated in the first driving so that filtered signal is converted into drive signal to carry out electrical power conversion Go out the drive output 1522 of end 1521 and second to export.The coupling of LED module 630 first drive output 1521 and the second driving are defeated Go out end 1522, lighted with receiving drive signal, the electric current of preferably LED module 630 is stable at a setting electric current value.

It is worth noting that, the second rectification circuit 540 can omit for inessential component, therefore it is represented by dotted lines in figure. That is, the LED illumination module 530 in embodiment shown in Fig. 6 A and Fig. 6 C can further include drive such as Fig. 6 E embodiment Dynamic circuit 1530 and LED module 630.Therefore, the power supply module of the LED of the present embodiment can be also applied to single ended power supply, both-end The applied environment of power supply, for example：Bulb lamp, PAL lamps etc. are applicable.

Fig. 9 B are referred to, are the circuit box schematic diagram of the drive circuit according to the preferred embodiment of the application first.Driving Circuit includes controller 1531 and change-over circuit 1532, electrical power conversion is carried out with the pattern of current source, to drive LED module to send out Light.Change-over circuit 1532 includes on-off circuit 1535 and accumulator 1538.The coupling of change-over circuit 1,532 first filtering output The filtering output end 522 of end 521 and second, signal after accepting filter, and according to the control of controller 1531, it is converted into drive signal And exported by the first drive output 1521 and the second drive output 1522, to drive LED module.In the control of controller 1531 Under system, the drive signal that change-over circuit 1532 is exported is stabling current, and makes LED module stabilized illumination.

Fig. 9 C are referred to, are the circuit diagram of the drive circuit according to the preferred embodiment of the application first.In this implementation Example, drive circuit 1630 is decompression DC to-DC switching circuit, comprising controller 1631 and change-over circuit, and change-over circuit bag Containing inductance 1632, fly-wheel diode 1633, electric capacity 1634 and switching switch 1635.The filtering of the coupling of drive circuit 1,630 first is defeated Go out end 521 and second filtering output end 522, the filtered signal of reception is converted into drive signal, the is coupled in drive LED module between one drive output 1521 and the second drive output 1522.

In the present embodiment, switching switch 1635 is metal-oxide half field effect transistor, with control end, first end and second End.The first end of switching switch 1635 couples the positive pole of fly-wheel diode 1633, and the second end couples the second filtering output end 522, Control end, which couples control of the controller 1631 to receive controller 1631, to be made between first end and the second end on or off.The One drive output 1521 couples the first filtering output end 521, and the second drive output 1522 couples one end of inductance 1632, and The first end of the other end coupling switching switch 1635 of inductance 1632.Electric capacity 1634 be coupled to the first drive output 1521 and Between second drive output 1522, to stablize the voltage between the first drive output 1521 and the second drive output 1522 Difference.The negative terminal of fly-wheel diode 1633 couples the first drive output 1521.

Next the running of explanation drive circuit 1630.

When controller 1631 determines the conducting and cut-off of switching switch 1635 according to current sense signal S535 and/or S531 Between, that is, control the dutycycle (Duty Cycle) of switching switch 1635 to adjust the size of drive signal.Current sense is believed Number S535 systems represent the size of current for flowing through switching switch 1635.The representative of current sense signal S535 systems, which is flowed through, is coupled to the first drive The size of current of LED module between the dynamic drive output 1522 of output end 1521 and second.According to current sense signal S531 And S535 any, controller 1631 can obtain the information for the electric power size that change-over circuit is changed.When switching switch 1635 During conducting, the electric current of filtered signal is flowed into by the first filtering output end 521, and passes through the drive output of electric capacity 1634 and first 1521 to LED module, inductance 1632, switching switch 1635 after flowed out by the second filtering output end 522.Now, electric capacity 1634 and Inductance 1632 carries out energy storage.When switching switch 1635 ends, inductance 1632 and electric capacity 1634 discharge stored energy, electric current Make LED module still continuous illumination to the first drive output 1521 through the afterflow of fly-wheel diode 1633.

It is worth noting that, the inessential component of electric capacity 1634 and can omit, therefore be represented by dotted lines in figure.Should at some With environment, the effect of stable LED module electric current can be reached by the characteristic of the change of inductance meeting resistive and electricity is omitted Hold 1634.

It is that the application circuit square of the power supply module of LED according to the preferred embodiment of the application the 4th shows referring to Figure 10 A It is intended to.The present embodiment includes the first rectification circuit 510 and the second rectification circuit 540, filter circuit 520 and anti-flicker circuit 550, And more increasing protection circuit 560, wherein power supply module can also include the part component of LED illumination module 530.Protection circuit 560 the first filtering output ends 521 of coupling and the second filtering output end 522, detecting filtered signal are protected with deciding whether to enter State.When determining to enter guard mode, the level of the strangulation filtered signal of protection circuit 560, to avoid LED illumination mould Component in block 530 is damaged.Wherein, the second rectification circuit 540 and anti-flicker circuit 550 are omissible circuit, in figure It is represented by dotted lines in formula.

It is the circuit diagram of the protection circuit according to the preferred embodiment of the application one referring to Figure 10 B.Protection circuit 660 Comprising electric capacity 663 and 670, resistance 669, diode 672, voltage clamping circuit and bleeder circuit, wherein voltage clamping circuit is comprising two-way Controllable silicon 661 and bidirectional trigger diode 662, bleeder circuit include the first bipolar junction crystal as the first switching switch Pipe 667 and be used as second switching switch the second bipolar junction transistors 668, first resistor 665, second resistance the 666, the 3rd The resistance 671 of resistance 664 and the 4th.Protection circuit 660 enters guard mode when the electric current and/or overtension of LED module, and Avoid the damage of LED module.

The first end of bidirectional triode thyristor 661 couples the first filtering output end 521, and the second end couples the second filtering output end 522, and control end couples the first end of bidirectional trigger diode 662.Second end coupling capacitance of bidirectional trigger diode 662 663 one end, the other end of electric capacity 663 couples the second filtering output end 522.One end of resistance 664 couples the two-way pole of triggering two Second end of pipe 662, the other end couples the second filtering output end 522, and in parallel with electric capacity 663.One end coupling of first resistor 665 The second end of bidirectional trigger diode 662 is connect, the other end couples the collector of the first bipolar junction transistors 667.First pair of load The emitter-base bandgap grading of sub- junction transistor 667 couples the second filtering output end 522.One end of second resistance 666 couples the two-way pole of triggering two Second end of pipe 662, the other end couples the collector and the first bipolar junction transistors of the second bipolar junction transistors 668 667 base stage.The emitter-base bandgap grading of second bipolar junction transistors 668 couples the second filtering output end 522.One end coupling of resistance 669 Connect the base stage of the second bipolar junction transistors 668, one end of other end coupling capacitance 670.The other end coupling the of electric capacity 670 Two filtering output ends 522.One end of 4th resistance 671 couples the second end of bidirectional trigger diode 662, and the other end couples two poles The negative pole of pipe 672.The positive pole of diode 672 couples the first filtering output end 521.

It is worth noting that, the resistance of first resistor 665 is less than the resistance of second resistance 666.

First illustrate the operation of the overcurrent protection of protection circuit 660 below.

The tie point of resistance 669 and electric capacity 670 receives current sense signal S531, and wherein current sense signal S531 is represented The size of current that LED module is flowed through.The other end coupling voltage end 521 ' of 4th resistance 671.In this embodiment, voltage end 521 ' can couple a bias generator or such as schema, after being couple to the first filtering output end 521 through diode 672 with filtering Signal is used as bias generator.When voltage end 521 ' couples extra bias generator, diode 672 can save filter, in the drawings, two poles Pipe 672 is represented by dotted lines.The combination of resistance 669 and electric capacity 670 can filter current sense signal S531 radio-frequency component, and will Rear current sense signal S531 is filtered to input the base stage of the second bipolar junction transistors 668 to control the second bipolar junction brilliant The conducting and cut-off of body pipe 668.By the filter action of resistance 669 and electric capacity 670, second caused by noise can be avoided The misoperation of bipolar junction transistors 668.In practical application, resistance 669 and electric capacity 670 can omit (the event He of resistance 669 Electric capacity 670 is represented by dotted lines in figure), and current sense signal S531 is directly inputted into the second bipolar junction transistors 668 Base stage.

When LED normal operating and the electric current of LED module are in normal range (NR), the second bipolar junction transistors 668 For cut-off.Now, the base voltage of the first bipolar junction transistors 667 is drawn high and causes first pair of load by second resistance 666 Sub- junction transistor 667 is turned on.Now, the current potential at the second end of bidirectional trigger diode 662 is according to the bias of power end 521 ' The voltage in source, and the 4th resistance 671 and 3rd resistor 664 in parallel and first resistor 665 dividing ratios and determine.Due to The resistance of first resistor 665 is smaller, and dividing ratios are relatively low thus current potential of the second end of bidirectional trigger diode 662 is relatively low.This When, the control terminal potential of bidirectional triode thyristor 661 is also dragged down by bidirectional trigger diode 662, and bidirectional triode thyristor 661 makes for cut-off Protection circuit 660 is in unprotected state.

When the electric current of LED module is more than an overcurrent value, now current sense signal S531 level can be too high and makes Two bipolar junction transistors 668 are turned on.Second bipolar junction transistors 668 can drag down the first bipolar junction transistors 667 base stage and cause the first bipolar junction transistors 667 for cut-off.Now, the second end of bidirectional trigger diode 662 Current potential is according to the voltage of the bias generator of power end 521 ', and the 4th resistance 671 and 3rd resistor 664 and second resistance in parallel 666 dividing ratios and determine.Because the resistance of second resistance 666 is larger, dividing ratios are higher thus bidirectional trigger diode The current potential at 662 the second end is higher.Now, the control terminal potential of bidirectional triode thyristor 661 is also drawn by bidirectional trigger diode 662 Height, bidirectional triode thyristor 661 is conducting with the voltage difference between strangulation the first filtering output end 521 and the second filtering output end 522 And protection circuit 660 is in guard mode.

In the present embodiment, the voltage system of bias generator according to the trigger voltage of bidirectional triode thyristor 661, the 4th resistance 671 and 3rd resistor 664 in parallel and the dividing ratios and the 4th resistance 671 of first resistor 665 and 3rd resistor 664 in parallel and The dividing ratios of second resistance 666 are determined.Thereby, the voltage of bias generator after the former dividing ratios partial pressure less than it is two-way can The trigger voltage of silicon 661 is controlled, and is higher than the trigger voltage of bidirectional triode thyristor 661 after the dividing ratios partial pressure of the latter.It is, When the electric current of the LED module is more than overcurrent value, bleeder circuit heightens the dividing ratios, and reaches the sluggish work compared With.In terms of specific implementation, as the first bipolar junction transistors 667 and the second bipolar junction transistors of switching switch 668 connect respectively determines the first resistor 665 and second resistance 666 of dividing ratios, and bleeder circuit is according to the electric current of LED module It is no to be more than overcurrent value, to determine what the first bipolar junction transistors 667 and the whichever of the second bipolar junction transistors 668 end Person turns on, to determine dividing ratios.Voltage clamping circuit decides whether the voltage of strangulation LED module according to the partial pressure of bleeder circuit.

Then the operation of the overvoltage protection of protection circuit 660 is illustrated.

The tie point of resistance 669 and electric capacity 670 receives current sense signal S531, and wherein current sense signal S531 is represented The size of current that LED module is flowed through.Therefore, now protection circuit 660 still has the function of current protection.4th resistance 671 The other end couples voltage end 521 ', in this embodiment, and voltage end 521 ' couples the anode of LED module to detect LED module Voltage.By taking the above embodiments as an example, in LED illumination module 530 does not include the embodiment of drive circuit 1530, voltage end 521 ' the first filtering output ends 521 of coupling；The implementation of drive circuit 1530 is included in LED illumination modules 530 such as Fig. 9 A to Fig. 9 C In example, voltage end 521 ' couples the first drive output 1521.In the present embodiment, the 4th resistance 671 and the 3rd electricity in parallel Resistance 664 and the dividing ratios and the 4th resistance 671 of first resistor 665 and 3rd resistor 664 in parallel and second resistance 666 Dividing ratios, which will regard the voltage of voltage end 521 ', the i.e. voltage of the first drive output 1521 or the first filtering output end 521, to be come Adjustment.Therefore, the overcurrent protection of protection circuit 660 still can normal operating.

When the electric current of LED module is not less than overcurrent value, the current potential at the second end of bidirectional trigger diode 662 is (by resistance 671 determine with first resistor 665 in parallel with the dividing ratios of 3rd resistor 664 with the voltage of voltage end 521 ') it is not enough to touch Send out bidirectional triode thyristor 661.Now, triggering bidirectional triode thyristor 661 is cut-off, and protection circuit 660 is in unprotected state.Work as LED Module operation exception, for example：LED module is opened a way, and causes the voltage of the anode of LED module more than an overpressure value.Now, it is two-way The current potential at the second end of diac 662 is higher and exceedes the first end of bidirectional trigger diode 662 and triggers two-way controllable The trigger voltage of silicon 661.Now, triggering bidirectional triode thyristor 661 is conducting, and protection circuit 660 is in guard mode and strangulation filter The level of signal after ripple.

As described above, protection control circuit 660 can have excessively stream or over-voltage protecting function, or can have simultaneously The function of stream and overvoltage protection.

In addition, protection circuit 660 can 3rd resistor 664 two ends parallel diode, with the voltage at strangulation two ends. The breakdown voltage of Zener diode is preferably 25-50V, more preferably 36V.

Furthermore, bidirectional triode thyristor 661 can be come with thyristor (Silicon Controlled Rectifier, SCR) Instead of bidirectional trigger diode 662 can be replaced with solid discharging tube (Thyristor Surge Suppressor), without shadow Ring the defencive function of protection circuit.Especially, pressure drop during conducting can be reduced by using thyristor pipe.

In one embodiment, the component parameter of protection circuit 660 can be set as follows.The resistance of resistance 669 is preferably 10 Europe Nurse.The capacitance of electric capacity 670 is preferably 1nf.The capacitance of electric capacity 633 is preferably 10nf.The voltage range of bidirectional trigger diode 662 26-36V.The resistance of 4th resistance 671 is preferably 300K-600K ohm, more preferably 540K ohm.The resistance of second resistance 666 Preferably 100K-300K ohm, more preferably 220K ohm.The resistance of first resistor 665 is preferably 30K-100K ohm, is more preferably 40K ohm.The resistance of 3rd resistor 664 is preferably 100K-300K ohm, more preferably 220K ohm.

It is that the application circuit square of the power supply module of LED according to the preferred embodiment of the application the 6th shows referring to Figure 11 A It is intended to.Compared to Fig. 9 A illustrated embodiments, the present embodiment includes the first rectification circuit 510 and the second rectification circuit 540, filtered electrical Road 520, drive circuit 1530, and more increase mode switching circuit 580 and switching judging circuit 590, wherein drive circuit 1530 And the composition LED illumination of LED module 630 module 530.The coupling of mode switching circuit 580 first filtering output end 521 and the second filtering At least one and the first drive output 1521 of output end 522 and the second drive output 1522 at least one, To determine to carry out the first drive pattern or the second drive pattern.Wherein, filtered signal is inputted and driven by the first drive pattern system Dynamic circuit 1530, the second drive pattern system at least bypasses the part component of drive circuit 1530, drive circuit 1530 is stopped behaviour Make and filtered signal is directly inputted and LED module 630 is driven.The part component of bypassed drive circuit 1530 includes electricity Sense or switching switch, make drive circuit 1530 can not carry out electrical power conversion and stop operation.Certainly, the electric capacity of drive circuit 1530 If in the presence of and do not omit, still can reach the voltage at stable LED module two ends to filter the ripple of filtered signal Effect.When mode switching circuit 580 determine the first drive pattern and during by filtered signal input driving circuit 1530, driving electricity Filtered signal is converted into drive signal to drive LED module 630 to light by road 1530.When mode switching circuit 580 determines Two drive patterns and when filtered signal directly being transported into LED module 630 and drive circuit 1530 is bypassed, equivalent upper filter circuit 520 be the drive circuit of LED module 630, and filter circuit 520 provides the drive signal that filtered signal is LED module, to drive LED module lights.

It is worth noting that, mode switching circuit 580 can be received according to the order of user or detecting LED via First pin 501, the second pin 502, the 3rd pin 503 and the received signal of the 4th pin 504 judge, and determine first Drive pattern or the second drive pattern.Therefore, referring again to Figure 11 A, the present embodiment can further include switching judging circuit 590, Judge to the signal received according to LED, make mode switching circuit 580 according to judging result signal S580 (and S585) Determine the first drive pattern or the second drive pattern.By mode switching circuit, the power supply module of LED can correspond to different Applied environment or drive system, and appropriate drive pattern is adjusted, thus improve the compatibility of LED.In addition, the second rectification Circuit 540 is represented by dotted lines for that can omit circuit.

It is the circuit diagram of the mode switching circuit according to the preferred embodiment of the application first referring to Figure 11 B.Pattern is cut Change circuit 680 and include mode selector switch 681, it is adaptable to the drive circuit 1630 shown in Fig. 9 C.Please referring also to Figure 11 B and figure 9C, mode selector switch 681 has three end points 683,684,685, and end points 683 couples the second drive output 1522, end points 684 the second filtering output ends 522 of coupling and end points 685 couple the inductance 1632 of drive circuit 1630.

When mode switching circuit 680 determines first mode, the first of the conducting end points 683 and 685 of mode selector switch 681 Current path and the second current path for ending end points 683 and 684.Now, the second drive output 1522 and the coupling of inductance 1632 Connect.Therefore, the normal operation of drive circuit 1630, will be accepted filter by the first filtering output end 521 and the second filtering output end 522 Signal and it is converted into drive signal afterwards LED module is driven by the first drive output 1521 and the second drive output 1522.

When mode switching circuit 680 determines second mode, the second of the conducting end points 683 and 684 of mode selector switch 681 Current path and the first current path for ending end points 683 and 685.Now, the second filtering output end 522 and the second driving are exported End 1522 is coupled.Therefore, drive circuit 1630 decommissions.Filtered signal is by the first filtering output end 521 and the second filtering Output end 522 is inputted directly drives LED module by the first drive output 1521 and the second drive output 1522, and bypasses and drive The inductance 1632 and switching switch 1635 of dynamic circuit 1630.

It is the circuit diagram of the mode switching circuit according to the preferred embodiment of the application second referring to Figure 11 C.Pattern is cut Change circuit 780 and include mode selector switch 781, it is adaptable to the drive circuit 1630 shown in Fig. 9 C.Please referring also to Figure 11 C and figure 9C, mode selector switch 781 has three ends 783,784,785, and end points 783 couples the second filtering output end 522, end points 784 Couple the switching switch 1635 of the second drive output 1522 and the coupling drive circuit 1630 of end points 785.

When mode switching circuit 780 determines first mode, the first of the conducting end points 783 and 785 of mode selector switch 781 Current path and the second current path for ending end points 783 and 784.Now, the second filtering output end 522 and switching switch 1635 Coupling.Therefore, the normal operation of drive circuit 1630, will receive filter by the first filtering output end 521 and the second filtering output end 522 Signal and it is converted into drive signal after ripple LED module is driven by the first drive output 1521 and the second drive output 1522.

When mode switching circuit 780 determines second mode, the second of the conducting end points 783 and 784 of mode selector switch 781 Current path and the first current path for ending end points 783 and 785.Now, the second filtering output end 522 and the second driving are exported End 1522 is coupled.Therefore, drive circuit 1630 decommissions.Filtered signal is by the first filtering output end 521 and the second filtering Output end 522 is inputted directly drives LED module by the first drive output 1521 and the second drive output 1522, and bypasses and drive The inductance 1632 and switching switch 1635 of dynamic circuit 1630.

It is worth noting that, the mode selector switch in above-described embodiment can be single-pole double-throw switch (SPDT), or two and half lead Body is switched (for example：Metal-oxide half field effect transistor), it is conducting for switching one of two current paths, it is another for cut-off. Guiding path of the current path system to provide filtered signal, makes the electric current of filtered signal flow through one of them to reach mould The function of formula selection.For example, please referring also to Fig. 6 A, Fig. 6 B and Fig. 6 D, when lamp tube drive circuit 505 is not present and by handing over When stream power supply 508 directly supplies electricity to LED straight lamps 500, mode switching circuit may decide that first mode, will be filtered by drive circuit Signal is converted into drive signal after ripple, the level of drive signal is matched LED module and lights required level, and is able to just Really driving LED module lights.In the presence of lamp tube drive circuit 505, mode switching circuit may decide that second mode, by filtering Signal direct drive LED module lights afterwards；Or first mode can also be determined, still filtered signal is changed by drive circuit Into drive signal with drive LED module light.

It is the circuit signal of the switching judging circuit of LED according to the preferred embodiment of the application first referring to Figure 11 D Figure.Switching judging circuit 690 includes a bidirectional trigger diode 691 and a resistance 692, bidirectional trigger diode 691 and resistance 692 series connection, can be as voltage decision circuitry 695, the voltage levels to judge external drive signal.Bidirectional trigger diode Output end 521 after the filtering of 691 one end coupling first, one end of other end coupling resistance 692, and the other end of resistance 692 is coupled Output end 522 after second filtering.The tie point of bidirectional trigger diode 691 and resistance 692 then produces judging result signal S580 To mode switching circuit 580.When external drive signal is the signal of high-frequency and high-voltage, judging result signal S580 is high level, Mode switching circuit 580 is set to determine the second drive pattern.For example：, will in the presence of Fig. 6 A, 6B and 6D lamp tube drive circuit 505 The ac supply signal of AC power 508 is converted into high frequency, the alternating current drive signal of high pressure.Now, mode switching circuit is determined Second drive pattern, makes the filtered signal direct drive in output end 522 after output end 521, second is filtered after the first filtering LED module 630 lights.When external drive signal is low frequency, the signal of low pressure, judging result signal S580 is low level, is made Mode switching circuit determines the first drive pattern.For example：When Fig. 6 A, 6B and 6D lamp tube drive circuit 505 are not present, alternating current The ac supply signal in source 508 directly inputs LED daylight lamp 500.Now, mode switching circuit 580 determines the first drive pattern, Make output end 521, second after the first filtering filter after filtered signal in output end 522 level conversion into suitable LED moulds The voltage of block 630 is lighted with driving LED module 630.

In other embodiments, if omitting filter circuit 520, the second drive pattern is determined in mode switching circuit 580 In situation, the rectified signal direct drive LED module 630 on the first rectification output end 511, the second rectification output end 512 lights； In the situation that mode switching circuit 580 determines the first drive pattern, the first rectification output end 511, the second rectification output end 512 On rectified signal level conversion into the voltage of suitable LED module 630 with drive LED module 630 light.

In the present embodiment, the selected threshold of bidirectional trigger diode 691 is 400V~1300V；Preferably selected threshold is 450V~700V；More preferably selected threshold is 500V~600V.

It is worth noting that, switching judging circuit 690 can further include a resistance 693 and a switching switch 694.Due to electricity Resistance 693 and the visual applicable cases of switching switch 694 are omitted, and are represented by dotted lines herein.Resistance 693 is connected with switching switch 694, i.e., Output end 521 after the filtering of the one end of resistance 693 coupling first, one end of other end coupling switching switch 694, and switch switch 694 The other end coupling second filtering after output end 522.Switching switch 694 control end then couple bidirectional trigger diode 691 with The tie point of resistance 692 is produced in the tie point of resistance 693 and switching switch 694 accordingly with receiving judging result signal S580 Raw another judging result signal S585.Judging result signal S580 and S585 are inversion signal, have double mode switching to provide The mode switching circuit of switch is used.

It is the circuit signal of the switching judging circuit of LED according to the preferred embodiment of the application second referring to Figure 11 E Figure.Switching judging circuit 790 includes an electric capacity 791, the switching of resistance 792 and 793 and one switch 794；Wherein electric capacity 791 and Resistance 792 is connected as frequency decision circuitry 795, to judge the frequency of external drive signal just.The one end of electric capacity 791 is coupled First rectification output end 511, one end of other end coupling resistance 792, and the other end of resistance 792 couples the second rectification output end 512.Frequency decision circuitry 795 produces a judging result signal S580 in the tie point of resistance 792 and electric capacity 791, wherein judging Consequential signal S580 level system determines that, when frequency is higher, the level of signal is got over according to the frequency height of external drive signal It is high；Otherwise it is then lower.Therefore, when external drive signal be high frequency (for example：More than 20KHz), the signal of high pressure when, judged result Signal S580 is high level, mode switching circuit is determined the second drive pattern.When external drive signal be low frequency, low pressure letter Number when, judging result signal S580 be low level, mode switching circuit is determined the first drive pattern.Similarly, switching judging Circuit 790 can further include a resistance 793 and a switching switch 794.Resistance 793 is series at the first filtering with switching switch 794 After output end 521 and second is filtered afterwards between output end 522, and the control end of switching switch 794 then couples frequency decision circuitry 795 to receive judging result signal S580, and produces another judgement knot in the tie point of resistance 793 and switching switch 794 accordingly Fruit signal S585.Judging result signal S580 and S585 are inversion signal, are cut with providing the pattern switched with double mode switching Circuit is changed to use.Resistance 793 and the visual applicable cases of switching switch 794 are omitted, and are represented by dotted lines herein.

It is that the application circuit square of the power supply module of LED according to the preferred embodiment of the application the 7th shows referring to Figure 12 A It is intended to.Compared to Fig. 6 E illustrated embodiments, the fluorescent lamp of the present embodiment includes the first rectification circuit 510 and the second rectification circuit 540 and filter circuit 520, and more increase ballast compatible circuit 1510, wherein power supply module can also include LED illumination module 530 part component.Ballast compatible circuit 1510 can be coupled to the first pin 501 and/or the second pin 502 and rectification circuit Between 510.In the present embodiment, the explanation so that ballast compatible circuit 1510 is coupled between the first pin 501 and rectification circuit as an example. Please referring also to Fig. 6 A, Fig. 6 B and Fig. 6 D, lamp tube drive circuit 505 are electric ballast there is provided alternating current drive signal to drive The LED of the present embodiment.

At the beginning of starting due to the drive system of lamp tube drive circuit 505, fan-out capability is not yet promoted to normal condition completely. However, the power supply module of LED turns on and received the exchange driving letter that lamp tube drive circuit 505 is provided immediately at the beginning of startup Number.At the beginning of this can cause startup, lamp tube drive circuit 505 has load and can not smoothly started immediately.For example, fluorescent tube drives The intraware of circuit 505 from the output power taking that it is changed maintain start after operation, output voltage can not normally rise and Cause start fail, or the resonance circuit of lamp tube drive circuit 505 Q values change because of the addition of the load of LED and can not Smoothly start etc..

The ballast compatible circuit 1510 of the present embodiment will be presented open-circuit condition, make alternating current drive signal at the beginning of startup Energy can not be inputted to LED module, and just enters conducting state after the time delay being set, and make the energy of alternating current drive signal Start input to LED lamp module.Above-mentioned ballast compatible circuit 1510 is opened in the alternating current drive signal as external drive signal It is cut-off that beginning input LED straight lamp, which was risen in a setting time delay, in being conducting after the setting time delay, thereby LED Starting characteristic-driving power supply of operation simulation fluorescent lamp start internal gas after latter section of time delay and just discharge and send out Light.Therefore, ballast compatible circuit 1510 further improves the compatibility to the lamp tube drive circuits such as electric ballast 505.

In the present embodiment, the second rectification circuit 540 is omissible circuit, is represented by dotted lines.

It is that the application circuit square of the power supply module of LED according to the preferred embodiment of the application the 8th shows referring to Figure 12 B It is intended to.Compared to Figure 12 A illustrated embodiments, the ballast compatible circuit 1510 of the present embodiment can be coupled to the 3rd pin 503 and/or Between 4th pin 504 and the second rectification circuit 540.Such as the explanation of ballast compatible circuit 1510 in Figure 12 A, the compatible electricity of ballast Road 1510 has the effect of delay start, makes the time of the input delay setting of alternating current drive signal, it is to avoid electric ballast The problem of starting failure Deng lamp tube drive circuit 505.

Ballast compatible circuit 1510 can also be corresponded in addition to being placed in such as above-mentioned embodiment between pin and rectification circuit The framework of different rectification circuits and rearrange within rectification circuit.Figure 12 C are referred to, are according to the application preferred embodiment The circuit configuration schematic diagram of ballast compatible circuit.In the present embodiment, rectification circuit system is using the rectification circuit 810 shown in Fig. 7 C Circuit framework.Rectification circuit 810 includes rectification unit 815 and end points change-over circuit 541.The coupling of rectification unit 815 first connects The pin 502 of pin 501 and second, end points change-over circuit 541 couples the first rectification output end 511 and the second rectification output end 512, and Ballast compatible circuit 1510 is coupled between rectification unit 815 and end points change-over circuit 541.At the beginning of startup, as outside drive The alternating current drive signal of dynamic signal starts to input LED straight lamps, and alternating current drive signal is only capable of by rectification unit 815, and can not By end points change-over circuit 541 and internal filter circuit and LED illumination module etc., and first in rectification unit 815 is whole The parasitic capacitance for flowing the commutation diode 812 of diode 811 and second is fairly small negligible.Therefore, the power supply module of LED etc. Effect does not couple lamp tube drive circuit 505 inductively or capacitively at the beginning of startup, thus does not influence the Q values of lamp tube drive circuit 505 And lamp tube drive circuit 505 can be made along startup.

It is worth noting that, on the premise of end points change-over circuit 541 does not include and inductively or capacitively waits component, rectification unit 815 and end points change-over circuit 541 exchange (that is, rectification unit 815 couple the first rectification output end 511 and the second rectification output End 512, end points change-over circuit 541 couples the first pin 501 and the second pin 502 has no effect on the work(of ballast compatible circuit 1510 Energy.

Furthermore, such as Fig. 7 A to Fig. 7 D explanation, the first pin 501 and the second pin 502 of rectification circuit are changed to the 3rd When pin 503 and four pins 504, you can be used as the second rectification circuit 540.That is, the electricity of above-mentioned ballast compatible circuit 1510 Road configuration can also be changed in the second rectification circuit 540 without influenceing the function of ballast compatible circuit 1510.

In addition, end points change-over circuit 541 does not include inductively or capacitively grade component, or the first rectification circuit as before 510 or second rectification circuit 540 using rectification circuit 610 as shown in Figure 7 A when, the first rectification circuit 510 or the second rectified current The parasitic capacitance on road 540 is fairly small, does not also interfere with the Q values of lamp tube drive circuit 505.

It is that the application circuit square of the power supply module of LED according to the preferred embodiment of the application the 9th shows referring to Figure 12 D It is intended to.Compared to Figure 12 A illustrated embodiments, the ballast compatible circuit 1510 of the present embodiment be coupled to the second rectification circuit 540 with Between filter circuit 520.Described above, the second rectification circuit 540 in the present embodiment, which does not include, inductively or capacitively waits component, because This does not influence the function of ballast compatible circuit 1510.

It is that the application circuit square of the power supply module of LED according to the preferred embodiment of the application the tenth shows referring to Figure 12 E It is intended to.Compared to Figure 12 A illustrated embodiments, the ballast compatible circuit 1510 of the present embodiment is coupled to rectification circuit 510 and filtering Between circuit 520.Similarly, the rectification circuit 510 in the present embodiment, which does not include, inductively or capacitively waits component, therefore does not influence town Flow the function of compatible circuit 1510.

It is the circuit diagram of the ballast compatible circuit according to the preferred embodiment of the application first referring to Figure 12 F.Ballast is simultaneous Original state in capacitive circuit 1610 is that equivalent go up is to open between the compatible input 1611 of ballast and the compatible output end 1621 of ballast Road.Ballast compatible circuit 1610 is received after signal in the compatible input 1611 of ballast, and it is defeated that the time that is set just turns on ballast compatibility Enter end 1611 and the compatible output end 1621 of ballast, the compatible received signal of input 1611 of ballast is sent to ballast compatibility defeated Go out end 1621.

Ballast compatible circuit 1610 includes diode 1612, resistance 1613,1615,1618,1620 and 1622, two-way controllable The compatible input 1611 of silicon 1614, bidirectional trigger diode 1617, electric capacity 1619, ballast and the compatible output end 1621 of ballast.Its In, the resistance of resistance 1613 is quite big, therefore when bidirectional triode thyristor 1614 ends, ballast compatibility input 1611 and ballast are simultaneous It is equivalent upper for open circuit between appearance output end 1621.

Bidirectional triode thyristor 1614 is coupled between the compatible input 1611 of ballast and the compatible output end 1621 of ballast, resistance 1613 be also coupled to it is in parallel with bidirectional triode thyristor 1614 between the compatible input 1611 of ballast and the compatible output end 1621 of ballast. Diode 1612, resistance 1620,1622 and electric capacity 1619 are sequentially series at the compatible input 1611 of ballast and ballast compatibility output Between end 1621, and it is in parallel with bidirectional triode thyristor 1614.The positive pole of diode 1612 is connected with bidirectional triode thyristor 1614, and negative pole It is connected to one end of resistance 1620.The control end of bidirectional triode thyristor 1614 is connected with one end of bidirectional trigger diode 1617, double Be connected to the other end of diac 1617 with one end of resistance 1618, the other end coupling capacitance 1619 of resistance 1618 and The connection end of resistance 1622.Resistance 1615 is coupled to the control end and resistance 1613 of bidirectional triode thyristor 1614 and the company of electric capacity 1619 Connect between end.Wherein, resistance 1615,1618,1620 can be omitted, and Gu Tuzhong is represented by dotted lines.It is two-way when resistance 1618 is omitted The connection end of the other end of diac 1617 and electric capacity 1619 and resistance 1622 is directly connected to.When resistance 1620 is omitted, two The negative pole of pole pipe 1612 is directly connected to resistance 1622.

When alternating current drive signal (for example：High frequency that electric ballast is exported, high-voltage AC signal) start to be input to town During stream compatibility input 1611, bidirectional triode thyristor 1614 is first in open-circuit condition, alternating current drive signal can not be inputted and is made LED Lamp is also at open-circuit condition.Alternating current drive signal starts to charge to electric capacity 1619 by diode 1612, resistance 1620,1622, It is gradually increasing the voltage of electric capacity 1619.After lasting charging a period of time, the voltage of electric capacity 1619 increases above two-way triggering The threshold value of diode 1617 and turn on triggering bidirectional trigger diode 1617.Then, the bidirectional trigger diode 1617 of conducting Bidirectional triode thyristor 1614 is triggered, bidirectional triode thyristor 1614 is also switched on.Now, the bidirectional triode thyristor 1614 of conducting is electrically connected with town The compatible input 1611 of stream and the compatible output end 1621 of ballast, make alternating current drive signal via the compatible input 1611 of ballast and town The compatible output end 1621 of stream is inputted, and the power supply module of LED is started operation.In addition, the energy stored by electric capacity 1619 is maintained Bidirectional triode thyristor 1614 is turned on, and is changed with the exchange for avoiding alternating current drive signal and is caused bidirectional triode thyristor 1614, i.e., ballast is compatible The cut-off once again of circuit 1610, or it is repeated on the problem of changing between conducting and cut-off.

When the ballast compatible circuit 1610 of the present embodiment is applied to Figure 12 C or Figure 12 D application circuit, because ballast is simultaneous Capacitive circuit 1610 receives the signal after rectification unit or rectifier circuit rectifies, and diode 1612 can be omitted.It is two-way controllable Silicon 1614 can be replaced with thyristor (Silicon Controlled Rectifier, SCR), bidirectional trigger diode 1617 can be replaced with solid discharging tube (Thyristor Surge Suppresser), the protection work(without influenceing protection circuit Energy.Especially, pressure drop during conducting can be reduced by using thyristor pipe.

Through hundreds of milliseconds, the output voltage of electric ballast after the startup of lamp tube drive circuit 505 such as general electric ballast It can bring up on certain voltage value and be unlikely to be loaded influenceing for addition by LED.Especially, the instantaneous starting of part The output AC voltage of type electric ballast first rough can maintain the electricity value definite value a bit of time, for example：0.01 second, electricity now Press definite value in below 300V, just begin to ramp up afterwards, and output end has the addition of any load in a bit of time herein, all may be used Instantaneous starting type electric ballast, which can be caused, can not smoothly draw high output AC voltage；Particularly, when instantaneous starting type electronics town When the input voltage for flowing device is 120V or following civil power, it is easier to occur.In addition, the lamp tube drive circuit such as electric ballast 505 can provided with fluorescent lamp whether the detecting of lighting, enter and protect if more than judging if the non-lighting of time fluorescent lamp fluorescent lamp abnormal Shield state.Therefore, the time delay of ballast compatible circuit 1610 preferably be more than 0.01 second, be more preferably 0.1 second to 3 seconds it Between.

It is worth noting that, resistance 1622 can extra shunt capacitance 1623.The effect of electric capacity 1623 is to react ballast The instantaneous variation of voltage difference between the compatible output end 1621 of compatible input 1611 and ballast, and ballast compatible circuit is not influenceed The effect of 1610 turn on delay.

Figure 12 G are referred to, are the application electricity of the power supply module of LED straight lamps according to the preferred embodiment of the application the 11st Road block schematic diagram.Compared to Fig. 6 D illustrated embodiments, the lamp tube drive circuit 505 of the present embodiment drives the LED of multiple series connection Ballast compatible circuit 1610 is equiped with straight lamp 500, and each LED straight lamps 500.For convenience of description, below with two Explanation exemplified by the LED straight lamps 500 of series connection.

Because the time delay of the ballast compatible circuit 1610 in two LED straight lamps 500 is because of factors such as device process errors Influence and with different time delays, therefore the ON time of two ballast compatible circuits 1610 is not consistent.Work as fluorescent tube Drive circuit 505 starts, and the voltage for the alternating current drive signal that lamp tube drive circuit 505 is provided is substantially by two LED straight lamps 500 respectively bear.When then when ballast compatible circuit 1610, one of them is first turned on, the exchange of lamp tube drive circuit 505 is driven The voltage of dynamic signal is nearly fallen on the another LED straight lamps 500 not yet turned on.This causes the LED straight lamps not yet turned on Cross-pressure on 500 ballast compatible circuit 1610 is doubled suddenly, i.e. the compatible input 1611 of ballast and ballast compatibility output Voltage difference is doubled suddenly between end 1621.Due to the presence of electric capacity 1623, the partial pressure effect of electric capacity 1619 and 1623 can wink Between draw high the voltage of electric capacity 1619 so that bidirectional trigger diode 1617 touches bidirectional triode thyristor 1614 and turned on, and makes two LED The ballast compatible circuit 1610 of straight lamp 500 is almost simultaneously turned on.By the addition of electric capacity 1623, the LED of series connection can be avoided straight Time delay between spot because of ballast compatible circuit 1610 is different, causes two-way in the ballast compatible circuit 1610 that first turns on The problem of controllable silicon 1614 ends once again because maintaining the electric current of conducting not enough.Therefore, the compatible electricity of ballast of electric capacity 1623 is added Road 1610 can further change the compatibility for the LED straight lamps connected.

In practical application, the suggestion capacitance of electric capacity 1623 is preferably 10pF~100PF between 10pF~1nF, more Good is 47pF.

It is worth noting that, diode 1612 is the signal progress rectification to be charged to electric capacity 1619.Therefore, refer to Figure 12 C, Figure 12 D and Figure 12 E, the applicable cases after ballast compatible circuit 1610 is configured at rectification unit or rectification circuit, Diode 1612 can be omitted.Therefore, in Figure 12 F, diode 1612 is represented by dotted lines.

It is the circuit diagram of the ballast compatible circuit according to the preferred embodiment of the application second referring to Figure 12 H.Ballast is simultaneous It between the compatible input 1711 of ballast and the compatible output end 1721 of ballast is open circuit that original state in capacitive circuit 1710, which is,.Ballast Compatible circuit 1710 receives signal in the compatible input 1711 of ballast, is less than a setting deferred telegram in the level of external drive signal It is cut-off during level values, as conducting when the level of external drive signal is more than and sets delay level value, makes the compatible input of ballast 1711 received signals are sent to the compatible output end 1721 of ballast.Setting delay level value is preferably more than or equal to 400V.

Ballast compatible circuit 1710 comprising bidirectional triode thyristor 1712, bidirectional trigger diode 1713, resistance 1714,1716 and 1717 and electric capacity 1715.The compatible input 1711 of first end coupling ballast of bidirectional triode thyristor 1712, control end coupling is two-way to touch One end of hair diode 1713 and one end of resistance 1714, and the other end of the second end coupling resistance 1714.The one of electric capacity 1715 The other end of end coupling bidirectional trigger diode 1713, the other end couples the second end of bidirectional triode thyristor 1712.Resistance 1717 with Electric capacity 1715 is in parallel, therefore is also coupled to the other end of bidirectional trigger diode 1713 and the second end of bidirectional triode thyristor 1712.Electricity The tie point of one end coupling bidirectional trigger diode 1713 and electric capacity 1715 of resistance 1716, the compatible output end of other end coupling ballast 1721。

When alternating current drive signal (for example：High frequency that electric ballast is exported, high-voltage AC signal) start to be input to town During stream compatibility input 1711, bidirectional triode thyristor 1712 is first in open-circuit condition, alternating current drive signal can not be inputted and is made LED Lamp is also at open-circuit condition.The input of alternating current drive signal can ballast compatible circuit 1710 the compatible input 1711 of ballast and Pressure difference is caused between ballast compatibility output end 1721.When alternating current drive signal, anaplasia is big and through reaching foot after a period of time at any time During enough amplitude (setting delay level value), the level of ballast compatibility output end 1721 is by resistance 1716, electric capacity in parallel 1715 and resistance 1717 and resistance 1714 be reacted to the control end of bidirectional triode thyristor 1712 and trigger bidirectional triode thyristor 1712 and lead It is logical.Now, ballast compatible circuit 1710 turns on and makes LED normal operating.After the conducting of bidirectional triode thyristor 1712, resistance 1716 Electric current is flowed through, and electric capacity 1715 is charged with storing certain voltage in electric capacity 1715.Energy stored by electric capacity 1715 is maintained Bidirectional triode thyristor 1712 is turned on, and is changed with the exchange for avoiding alternating current drive signal and is caused bidirectional triode thyristor 1712, i.e., ballast is compatible The cut-off once again of circuit 1710, or it is repeated on the problem of changing between conducting and cut-off.

Referring to the circuit diagram that Figure 12 I are the ballast compatible circuit 1910 according to the application preferred embodiment.Ballast is simultaneous Capacitive circuit 1910 includes resistance 1913,1916 and 1917, an electric capacity 1914, the one control switching switch of circuit 1918 and one 1919.The first rectification output end 511 of the one end of resistance 1913 coupling, one end of other end coupling capacitance 1914, and electric capacity 1914 The other end couples the second rectification output end 512, its tie point coupling connection control circuit 1918, to provide the control operation of circuit 1918 institute The electric power needed.Resistance 1916 and 1917 is series between the first rectification output end 511 and the second rectification output end 512, with basis The level of rectified signal produces a detection signal extremely control circuit 1918 for representing external communication signal.Switching switch 1919 Control end coupling connection control circuit 1918, the on or off with the control according to control circuit 1918.The two of switching switch 1919 The compatible input 1911 of end coupling ballast and the compatible output end 1921 of ballast.

The level of detection signal produced by control circuit 1918 judges resistance 1916 and 1917 is high less than one to judge electricity Usually, control circuit 1918 cut-off switching switch 1919.At the beginning of electric ballast starts, the AC signal exported is low pressure AC signal, its level is high not enough and when the level of detection signal that makes is less than high decision level, control circuit 1918 is controlled Switching switch 1919 is in open-circuit condition.Now, LED is in open-circuit condition and stopped operation.When alternating current drive signal at any time Anaplasia is big and when enough amplitude (setting delay level values) are reached after one section of time delay, now electric ballast is exported AC signal be high-voltage AC signal, make detection signal level period be higher than high decision level when, control circuit 1918 Control switching switch 1919 maintains conducting state.Now, LED normal operating.

Apply in electric ballast occasion, initial start stage (time is less than in 100ms, in usual 20~30ms) electronics town The level of AC signal produced by stream device is between 200V~300V, as electric ballast smoothly works, AC signal Level can exceed 300V.In the present embodiment, the resistance of resistance 1916 is preferably 200K ohm~500K ohm；More preferably 300K Ohm~400K ohm；The resistance of resistance 1917 is preferably 0.5K~4K ohm, more preferably 1.0K ohm~3K ohm；Height judges electricity Flat preferably 0.9V~1.25V, more preferably 1.0V.

It is worth noting that, the ballast compatible circuit of the present embodiment can also be applied to the judgement of Inductive ballast.Using In Inductive ballast occasion, the characteristic of " zero passage " is run using Inductive ballast, by taking civil power as an example, when power initiation initial stage When, the level of the detection signal produced by resistance 1916 and 1917 can be less than a low decision level, and the control control of circuit 1918 is cut Change switch 1919 and maintain conducting state, make LED normal operating.In the present embodiment, low decision level be preferably 0.2V with Under, more preferably below 0.1V.

That is, at power initiation initial stage, detection signal is higher than low decision level and (height judges less than high decision level Level is higher than low decision level) when, the control control switching of circuit 1918 switch 1919 is cut-off.When detection signal judges less than low Level or higher than high decision level, the control control switching of circuit 1918 switch 1919 is conducting.Therefore, whether using to electronics The occasion of ballast or Inductive ballast, the LED of the application can normally start and light.

In some implementation aspects, switching switch 1919 is electronic switch, such as electric crystal.

In other embodiments, resistance 1916, resistance 1917 and control circuit 1918 can be described as circuit for detecting, and resistance 1916th, resistance 1917 can be replaced with voltage decision circuitry 695.Then, in this embodiment, ballast compatible circuit 1910 can be wrapped Containing circuit for detecting and switching switch 1919, and circuit for detecting can include voltage decision circuitry 695 and control circuit 1918.Voltage is sentenced Deenergizing 695 can include bidirectional trigger diode 691 and resistance 692 is series at the first rectification output end 511 and the second rectification is defeated Go out between end 512, and the tie point between bidirectional trigger diode 691 and resistance 692 is coupled to control circuit 1918.

In this, voltage decision circuitry 695 receives rectified signal, and voltage decision circuitry 695 is produced according to the level of rectified signal Life can as foregoing detection signal judged result S580, control circuit 1918 is controlled according to judged result S580 level height System switching 1919 on or off of switch.

When controlling circuit 1918 to judge that judged result S580 level is less than high decision level, control circuit 1918 ends Switching switch 1919.At the beginning of electric ballast starts, the AC signal exported is low-voltage ac signal, and its level is not enough When judged result S580 level that is high and making is less than high decision level, the control control switching of circuit 1918 switch 1919 is in opening Line state.Now, LED is in open-circuit condition and stopped operation.When external drive signal, anaplasia is big at any time and prolongs by one section When enough amplitude (setting delay level values) are reached after the slow time, the AC signal of now electric ballast output is handed over for high pressure Signal is flowed, when making judged result S580 level period higher than high decision level, the control control switching switch of circuit 1918 1919 maintain conducting state.Now, rectified signal can flow directly into LED module 630 via switching switch 1919, or enter one Step flows into LED module 630 after being filtered by filter circuit 520, LED module 630 is turned on and is lighted.

Further, in other embodiments, foregoing circuit for detecting can include frequency decision circuitry 795；In other words, herein In embodiment, ballast compatible circuit 1910 can be comprising circuit for detecting and switching switch 1919, and circuit for detecting can be sentenced comprising frequency Deenergizing 795 and control circuit 1918.

Frequency decision circuitry 795 can be series at the first rectification output end 511 and second whole comprising electric capacity 791 and resistance 792 Flow between output end 512, and tie point between electric capacity 791 and resistance 792 is coupled to control circuit 1918.

In this, frequency decision circuitry 795 receives rectified signal, and voltage decision circuitry 695 is produced according to the level of rectified signal Life can as foregoing detection signal judged result S580, control circuit 1918 is controlled according to judged result S580 level height System switching 1919 on or off of switch.Wherein, judging result signal S580 level height system is according to external drive signal Frequency just determines that, when frequency is higher, the level of signal is higher；Otherwise it is then lower.In general, electric ballast output The frequency of external drive signal is higher than 20KHz, and the signal frequency of Inductive ballast is no more than 400Hz.Pass through setpoint frequency High judgment threshold and low judgment threshold, can also realize that LED is applied to Inductive ballast and electric ballast and can normally sent out Light.

Therefore, when the frequency of external drive signal is more than the high judgment threshold of setting and is high-frequency signal, frequency judges The judging result signal S580 that circuit 795 is produced turns on the control switching of control circuit 1918 switch 1919, now LED module 630 turn on and light；When the frequency of external drive signal is higher than low judgment threshold less than high judgment threshold, frequency judges electricity The judging result signal S580 that road 795 is produced ends the control switching of control circuit 1918 switch 1919, now LED module 630 In open-circuit condition；When the frequency of external drive signal is low frequency signal less than the low judgment threshold of setting, frequency judges The judging result signal S580 that circuit 795 is produced turns on the control switching of control circuit 1918 switch 1919, now LED module 630 turn on and light.

In other embodiments, resistance 1916 and resistance 1917 can be used as sampling branch road；In other words, in this embodiment, Ballast compatible circuit 1910 can be comprising control circuit 1918, switching switch 1919 and circuit for detecting, and circuit for detecting can include electricity The sampling branch road 1910a of the composition of resistance 1916,1917.Sampling branch road 1910a is coupled to the first rectification output end 511 and the second rectification Between output end 512, controlling switch 1918 is coupled between sampling branch road 1910a and switching switch 1919.Sample branch road 1910a Rectified signal is received, sampling branch road 1910a produces the level height of expression external drive signal according to the level of rectified signal Detection signal makes control circuit 1918 control switching switch 1919 to lead according to the level height of detection signal to circuit 1918 is controlled Logical or cut-off.Specifically, the level of sampling branch road 1910a samplings rectified signal, makes the connection of resistance 1619 and resistance 1917 Point produces the sampled result as detection signal.

Control circuit 1918 receives sampled result and whether judges external drive signal according to the level height of sampled result For high frequency or high-voltage signal.When controlling circuit 1918 to judge that the level of sampled result is less than high decision level, circuit is controlled 1918 cut-off switching switches 1919.At the beginning of electric ballast starts, the AC signal exported is low-voltage ac signal, its electricity When the level of sampled result that is flat high not enough and making is less than high decision level, at the control control switching of circuit 1918 switch 1919 In open-circuit condition.Now, LED is in open-circuit condition and stopped operation.When external drive signal, anaplasia is big at any time and passes through one When enough amplitude (setting delay level values) are reached after section time delay, the AC signal of now electric ballast output is height AC signal is pressed, when making the level period of sampled result higher than high decision level, the control control switching switch of circuit 1918 1919 maintain conducting state.Now, rectified signal can flow directly into LED module 630 via switching switch 1919, or enter one Step flows into LED module 630 after being filtered by filter circuit 520, LED module 630 is turned on and is lighted.

In other embodiments, control circuit 1918 and switching switch 1919 can also control IC modules to realize.Change speech It, control IC modules can be coupled to sampling branch road 1910a with according to represents external drive signal level just or frequency just Detection signal LED module 630 is opened a way or is turned on.

In summary, ballast compatible circuit 1910 is compatible in civil power, electric ballast, Inductive ballast and direct current Source.

In one embodiment, ballast compatible circuit is used for when the signal for receiving input reaches scheduled duration and ballast is compatible Conducting LED illumination module and power supply module when the intensity that circuit receives the voltage of input reaches predetermined threshold.

Ballast compatible circuit can include circuit for detecting and on-off circuit, and the signal for receiving input in LED straight lamps reaches When the intensity for the voltage that scheduled duration and ballast compatible circuit receive input reaches predetermined threshold, circuit for detecting trigger switch electricity Road turns on the compatible input of ballast and the compatible output end of ballast to connect LED illumination module and power supply module.Wherein, circuit for detecting Thyratron can be included, for example, solid discharging tube, when the voltage at discharge tube two ends reaches the threshold value of setting, discharge tube turn on into And the compatible input of trigger switch circuit turn-on ballast and the compatible output end of ballast.

Referring to the circuit diagram that Figure 12 J are the ballast compatible circuit 2110 according to the application preferred embodiment.It is real herein Apply in example, foregoing circuit for detecting can include discharge tube 561, or other thyratrons, on-off circuit can include bidirectional triode thyristor TR.On The intensity that the annexation and realization for stating component receive voltage connects LED illumination module and power supply mould when reaching predetermined threshold The principles and methods of group are as follows.

Ballast circuit for detecting 2110 is included：Bidirectional triode thyristor TR, discharge tube 561, discharge tube 562 and electric capacity 563；It is two-way can Control silicon TR one end, the input a connections compatible with ballast of one end of discharge tube 561, the other end and discharge tube of discharge tube 561 562 one end and one end connection of electric capacity 563；The other end of discharge tube 562 is connected with bidirectional triode thyristor TR control end, electric capacity 563 other end output end b compatible with ballast and bidirectional triode thyristor TR other end connection.When the voltage at the two ends of discharge tube 561 The threshold value of setting is reached, discharge tube 561 is turned on, at this moment the charged state of electric capacity 563, set when the voltage at the two ends of discharge tube 562 reaches Fixed threshold triggers bidirectional triode thyristor TR, at this moment bidirectional triode thyristor TR conductings (are i.e. turned on, start LED illumination module) between a, b end.

Parameter declaration：In the present embodiment between bidirectional triode thyristor TR pressure-resistant scope 600-1300 volts；Selected in the present embodiment 600 volts；Between 200 volt of -600 volt of pressure-resistant threshold range of discharge tube 561；Preferably choose between 300 volt of -440 volt；This Embodiment chooses 340 volts；Between 20 volt of -100 volt of pressure-resistant threshold range of discharge tube 562；Preferably choose between 30 volt of -70 volt Between；The present embodiment chooses 68 volts；The scope of electric capacity 563 be 2-50nF between, 10nF is chosen in the present embodiment.In the present embodiment The pressure-resistant threshold value of discharge tube 561 is more than the pressure-resistant threshold value of discharge tube 562.

Please with reference to introduction above to the embodiment shown in Figure 12 J, ballast compatible circuit 2210 shown in Figure 12 K Circuit diagram provides the embodiment of another circuit for detecting, and the ballast compatible circuit shown in Figure 12 K exists with Figure 12 J in difference In：Discharge tube 562 is replaced with bidirectional trigger diode 564, and the on-off circuit in two embodiments can be shared.Figure 12 K are carried Circuit for detecting in the embodiment of confession includes discharge tube 561, bidirectional trigger diode 564, electric capacity 563；One end of discharge tube 561 Input a couplings compatible with ballast, the other end is coupled with one end of bidirectional trigger diode 564 and one end of electric capacity 563；Second The other end of bidirectional trigger diode 564 is coupled with bidirectional triode thyristor TR control end, and the other end of electric capacity 563 is compatible with ballast Output end b connections；Wherein, the pressure-resistant threshold value of discharge tube 561 is more than the pressure-resistant threshold value of bidirectional trigger diode 564.

Parameter declaration：In the present embodiment between bidirectional triode thyristor TR pressure-resistant scope 600-1300 volts；Selected in the present embodiment 600 volts；Between 200 volt of -600 volt of pressure-resistant threshold range of discharge tube 561；Preferably choose between 300 volt of -440 volt；This Embodiment chooses 340 volts；Between 20 volt of -100 volt of pressure-resistant threshold range of bidirectional trigger diode 564；Preferably choose between Between 30 volt of -70 volt；The present embodiment chooses 68 volts；The scope of electric capacity 563 be 2-50nF between, 10nF is chosen in the present embodiment. The pressure-resistant threshold value of discharge tube 561 is more than the pressure-resistant threshold value of bidirectional trigger diode 564 in the present embodiment.

Further, ballast compatible circuit also includes current-limiting circuit, and current-limiting circuit can limit electric current in ballast compatible circuit Value.Figure 12 L are the circuit diagram on compatible electric 2310 tunnel of ballast according to the application preferred embodiment.Current-limiting circuit includes resistance 565, and the difference of ballast compatible circuit 2310 and Figure 12 K shown in Figure 12 L is：Resistance 565 is coupled to discharge tube 561 with putting Between fulgurite 562, remaining is unchanged；The annexation of remaining component and running can refer to above to the embodiment shown in Figure 12 K Introduction.

Parameter declaration：In the present embodiment between bidirectional triode thyristor TR pressure-resistant scope 600-1300 volts；Selected in the present embodiment 600 volts；Between 200 volt of -600 volt of pressure-resistant threshold range of discharge tube 561；Preferably choose between 300 volt of -440 volt；This Embodiment chooses 340 volts；Between 20 volt of -100 volt of pressure-resistant threshold range of bidirectional trigger diode 564；Preferably choose between Between 30 volt of -70 volt；The present embodiment chooses 68 volts；The scope of electric capacity 563 be 2-50nF between, 10nF is chosen in the present embodiment.

Figure 12 M are the circuit diagram of the ballast compatible circuit 2410 according to the application preferred embodiment.Shown in Figure 12 M The circuit diagram of ballast compatible circuit 2410 provides the embodiment of another circuit for detecting, and the switch in two embodiments Circuit can be shared.Circuit for detecting in the embodiment that Figure 12 M are provided can include discharge tube 561, and one end of discharge tube 561 is connected To the compatible input a of ballast, the other end is connected to bidirectional triode thyristor TR control end, and bidirectional triode thyristor TR main electrode is connected to Ballast compatibility input b；When the voltage at the two ends of discharge tube 561 reaches the threshold value of setting, discharge tube 561 is turned on, and triggering is two-way can Silicon TR is controlled, at this moment bidirectional triode thyristor TR conductings (are i.e. turned on, start LED illumination module) between a, b end.

Parameter declaration：In the present embodiment between bidirectional triode thyristor TR pressure-resistant scope 600-1300 volts；Selected in the present embodiment 600 volts；Between 20 volt of -100 volt of pressure-resistant threshold range of discharge tube 561；Preferably choose between 30 volt of -70 volt；This reality Apply example and choose 68 volts.

In one embodiment, ballast compatible circuit can only include circuit for detecting；One end of circuit for detecting is compatible with ballast Input is coupled, other end output end coupling compatible with ballast；When the voltage at circuit for detecting two ends reaches predetermined threshold, detecting Circuit connects the compatible input of ballast and the compatible output end of ballast.

Figure 12 N are the circuit diagram of the ballast compatible circuit 2510 according to the application preferred embodiment.Shown ballast is simultaneous Capacitive circuit 2510 and Figure 12 M are in difference：Eliminate bidirectional triode thyristor TR.Parameter declaration：The pressure-resistant threshold value model of discharge tube 561 Enclose between 20 volt of -100 volt；Preferably choose between 30 volt of -70 volt；The present embodiment chooses 68 volts.

Summary, by such design, can solve electric ballast can not normally start LED illumination in low-voltage The problem of module.It can be seen that the scheme that the application is proposed selects less component by Figure 12 J-12N topology simultaneously, so Greatly improve the reliability of system.

Refer to the circuit diagram that Figure 12 O are the ballast compatible circuit 2610 according to the application preferred embodiment.Here, Figure 12 O are so that a LED unit 632 represents LED module 630 as an example.The ballast compatible circuit 2610 of the present embodiment includes thyratron 2023, thyratron 2023 can as the circuit for detecting of ballast compatible circuit one of which part, to according to external drive signal Level height on or off.Thyratron 2023 can be solid discharging tube (Thyristor Surge Suppressor), double To diac (DIAC) or MOS electric crystals.Ballast compatible circuit 2610 is also referred to as ballast circuit for detecting.

Thyratron 2023 is coupled between the rectification circuit 510 of LED module 630 and first, or be coupled to LED module 630 with Between second rectification circuit 540.So that thyratron 2023 is coupled to the first rectification circuit 510 as an example, thyratron 2023 receives rectification The rectified signal that circuit 510 is produced, with the level on or off according to rectified signal；When the first pin 501 and the second pin When external drive signal received by 502 reaches that the level of scheduled duration and external drive signal reaches predetermined threshold, rectification The level of signal turns on thyratron 2023, first rectification circuit of the now connection of thyratron 2,023 510 and LED module 630, makes whole Stream signal is directly entered LED module 630, or via LED module 630 is entered after the filtering of filter circuit 520, leads LED module 630 Lead to and light.

Therefore, apply in electric ballast occasion, initial start stage, the level of the AC signal produced by electric ballast It is not enough to triggering thyratron 2023 to turn on, open-circuit condition will be presented in thyratron 2023, make the energy of external drive signal can not be defeated Enter LED module 630；As electric ballast smoothly works, the level of external drive signal is after the time delay of setting The level that just reaching makes rectified signal reaches the conduction threshold of thyratron 2023 and triggers thyratron 2023 and enter conducting state, makes The energy of external drive signal starts to input LED module 630.

Further, ballast compatible circuit 2610 also includes transistor 575, inductance 571, electric capacity 573 and resistance 574.Crystal The collector of pipe 575 couples the negative terminal of LED module 630, and inductance 571 and thyratron 2023 are series at the negative terminal and crystalline substance of LED module 630 Between the base stage of body pipe 575, the emitter-base bandgap grading of transistor 575 couples the first rectification circuit 510 and the second rectification circuit 540, resistance 574 It is coupled between the base stage of transistor 575 and emitter-base bandgap grading, required bias is operated to provide transistor 575.Electric capacity 573 is coupled to crystalline substance Between the base stage and collector of body pipe 575.The capacitance of electric capacity 573 can be 200~300pF, preferably choose, 100pF.Electric capacity 573 in addition to protecting transistor 575, and in the occasion of application IS type electric ballasts, electric capacity 573 can be provided and LED unit 632 Preferably match, can not normally start LED straight lamps in low-voltage (e.g., line voltage is less than 120V) occasion to improve, improve The compatibility of LED straight lamps and electron rectifier.

In this, after the time delay of setting, the level of external drive signal rises, the level triggers lock of rectified signal Flow tube 2023 is turned on, and makes the upper overcurrent of inductance 571；Also, the conducting of thyratron 2023 makes the cross-pressure between the two ends of resistance 574 big In the conducting voltage of transistor 575, make also to flow through electric current on thyratron 2023.Then, flow through the electric current of inductance 571 and flow through crystalline substance The shunting of body pipe 575 can maintain the conducting state of thyratron 2023, in other words, and inductance 571 has afterflow to thyratron 2023 Function and continued flow component can be used as.

Refer to Figure 12 P is the current waveform figure according to the thyratron 2023 of the application when conducting state, and above-mentioned is continuous Fluid element makes thyratron 2023 to be guaranteed at long logical state, and the electric current for flowing through thyratron 2023 levels off to constant.

In the present embodiment, inductance 571 can also play the function of antinoise, that is to say, that ballast compatible circuit can be wrapped Circuit containing antinoise, inductance 571 can be a component of antinoise circuit.

Figure 13 A are referred to, are the application electricity of the power supply module of LED straight lamps according to the preferred embodiment of the application the 15th Road block schematic diagram.Compared to Fig. 6 E illustrated embodiments, the LED straight lamps of the present embodiment include the first rectification circuit 510 and the Two rectification circuits 540, filter circuit 520 and LED illumination module 530, and more increase by two filament artificial circuits 1560.Two filaments are imitated True circuit 1560 is respectively coupled between the first pin 501 and the second pin 502 and is coupled to the 3rd pin 503 and the 4th and connects Between pin 504, the compatibility to improve the lamp tube drive circuit detected with filament, for example：With preheating function electronics town Flow device.

In one embodiment, filament artificial circuit 1560 can also be coupled to ballast compatible circuit 1590, ballast compatible circuit 1910 or mode switching circuit 580.

Lamp tube drive circuit with filament detecting is at the beginning of startup, and whether the filament that can detect fluorescent tube does not occur normally and Short circuit or the abnormal conditions of open circuit.When judging that filament occurs abnormal, lamp tube drive circuit can stop and enter guard mode.For Lamp tube drive circuit is avoided to judge that LED is abnormal, two filament artificial circuits 1560 can emulate normal filament, and drive fluorescent tube Dynamic circuit normally starts driving LED and lighted.

Figure 13 B are referred to, are the circuit diagram of the filament artificial circuit according to the preferred embodiment of the application first.Filament Artificial circuit 1660 includes electric capacity 1663 and resistance 1665 in parallel, and coupling is distinguished at the respective two ends of electric capacity 1663 and resistance 1665 Connect filament analog end 1661 and 1662.Please referring also to Figure 13 A, the filament emulation end 1661 of two filament artificial circuits 1660 and 1662 the first pins 501 of coupling and the second pin 502 and the 3rd pin 503 and the 4th pin 504.When lamp tube drive circuit is defeated Go out detection signal with test filament it is whether normal when, detection signal can make fluorescent tube by parallel electric capacity 1663 and resistance 1665 Drive circuit judges that filament is normal.

It is worth noting that, the capacitance of electric capacity 1663 is small.Therefore exported when lamp tube drive circuit formally drives LED During high frequency ac signal, the resistance of the remote small resistor 1665 of capacitive reactance (equivalent resistance) of electric capacity 1663.Thereby, filament artificial circuit 1660 in LED normal operating, and the power consumed is fairly small and has little influence on the luminous efficiency of LED.

Figure 13 C are referred to, are the circuit diagram of the filament artificial circuit according to the preferred embodiment of the application second.At this In embodiment, the first rectification circuit 510 and/or the second rectification circuit 540 are using the rectification circuit 810 shown in Fig. 7 C but omission end Point change-over circuit 541, and replace the function of end points change-over circuit 541 by filament artificial circuit 1660.That is, the filament of the present embodiment There is artificial circuit 1660 filament to emulate and end points translation function simultaneously.Please referring also to Figure 13 A, filament artificial circuit 1660 Filament emulation end 1661 and 1662 couples the first pin 501 and the second pin 502 and/or the 3rd pin 503 and the 4th pin 504.The coupling filament of half-wave tie point 819 analog end 1662 of rectification unit 815 in rectification circuit 810.

Figure 14 A are referred to, are the application electricity of the power supply module of LED straight lamps according to the preferred embodiment of the application the 16th Road block schematic diagram.Compared to Fig. 6 E illustrated embodiments, the LED straight lamps of the present embodiment include the first rectification circuit 510 and the Two rectification circuits 540, filter circuit 520 and LED illumination module 530, and more increase overvoltage crowbar 1570.Overvoltage protection electricity Road 1570 couples the first filtering output end 521 and the second filtering output end 522, to detect filtered signal, and in letter after filtering Number level higher than setting overpressure value when, the level of strangulation filtered signal.Therefore, overvoltage crowbar 1570 can be protected The component of LED illumination module 530 is not damaged because crossing high pressure.Second rectification circuit 540 is to omit, therefore in the drawings with dotted line Represent.

Figure 14 B are referred to, are the circuit diagram of the overvoltage crowbar according to the preferred embodiment of the application first.Overvoltage Protection circuit 1670 includes voltage-regulator diode 1671, for example：Zener diode (Zener Diode), the filtering output of coupling first The filtering output end 522 of end 521 and second.Voltage-regulator diode 1671 is in the first filtering output end 521 and the second filtering output end 522 Voltage difference (that is, the level of filtered signal) turn on when reaching breakdown voltage, make voltage difference strangulation on breakdown voltage.Overvoltage Protection circuit 1670 can be avoided, for example：Instantaneous starting type (Instant Start) electric ballast short time at the beginning of startup High alternating voltage output etc., temporary high voltage causes the damage of LED illumination module 530.Overvoltage crowbar 1670 Protect voltage (or breakdown voltage of voltage-regulator diode 1671) preferably less than 500V, for example：100-500V scope, more preferably For less than 400V, for example：300-400V scope.

Figure 14 C are referred to, are the circuit diagram of the overvoltage crowbar according to the preferred embodiment of the application second.Overvoltage Protection circuit 1770 includes a bidirectional trigger diode 1771, resistance 1772,1774 and 1776, an electric capacity 1773 and a switching Switch 1775.Bidirectional trigger diode 1771, resistance 1772 and electric capacity 1773 are series at the first filtering output end 521 and the second filter Between wave output terminal 522.One end of bidirectional trigger diode 1771 couples the first filtering output end 521, one end of electric capacity 1773 The second filtering output end 522 is coupled, and resistance 1772 is coupled between bidirectional trigger diode 1771 and electric capacity 1773.Resistance 1774 and switching switch 1775 be series between the first filtering output end 521 and the second filtering output end 522.The one of resistance 1774 The first filtering output end 521 of end coupling, other end coupling switching switch 1775.One end coupling second of switching switch 1775 is filtered Output end 522, and the tie point of control end coupling resistance 1772 and electric capacity 1773 by resistance 1776.Therefore, switching switch 1775 can turn on according to the voltage difference (that is, the level of filtering signal) of the first filtering output end 521 and the second filtering output end 522 Or cut-off.When the level of filtering signal is less than the threshold value of bidirectional trigger diode 1771, bidirectional trigger diode 1771 ends, It is low-voltage in the magnitude of voltage of resistance 1772 and the tie point of electric capacity 1773, low-voltage makes switching switch 1775 cut-offs；In filtering When the level of signal reaches threshold value of bidirectional trigger diode 1771 or more, bidirectional trigger diode 1771 is turned on, and makes electric capacity 1773 voltage raises and triggers the conducting of switching switch 1775 and protect LED illumination module 530.

In the present embodiment, the threshold value of bidirectional trigger diode 1771 is preferably 400V~1300V；More preferably 450V~ 700V, most preferably 500V~600V.

Figure 15 A are referred to, are the application electricity of the power supply module of LED straight lamps according to the preferred embodiment of the application the 17th Road block schematic diagram.Compared to Figure 13 A embodiment, the LED of the present embodiment includes the first rectification circuit 510 and the second rectification Circuit 540, filter circuit 520, the filament artificial circuit 1560 of LED illumination module 530 and two, and more increase ballast compatible circuit 1590.Ballast compatible circuit 1590 can be coupled to the first pin 501, the second pin 502, the 3rd pin 503 and the 4th pin Corresponding rectification circuit in 504 any and the first rectification circuit 510 and the second rectification circuit 540.In the present embodiment, town Stream compatible circuit 1590 is coupled between the first pin 501 and the first rectification circuit 510.

Ballast compatible circuit 1590 detects external drive signal or by the first pin 501, the second pin the 502, the 3rd The external drive signal of the pin 504 of pin 503 and the 4th input, and judge whether inputted signal is electricity according to detecting result Sub-ballast is provided.

Figure 15 B are referred to, are the application electricity of the power supply module of LED straight lamps according to the preferred embodiment of the application the 18th Road block schematic diagram.Compared to Figure 15 A embodiment, second rectification circuit 540 of the present embodiment is using the rectification shown in Fig. 7 C Circuit 810.Ballast compatible circuit 1590 is coupled between rectification unit 815 and end points change-over circuit 541.Rectification unit 815 and One of them the 3rd pin 503 of coupling of end points change-over circuit 541 and the 4th pin 504, the first rectification output end 511 of another coupling And second rectification output end 512.In the present embodiment, the 3rd pin 503 of coupling of rectification unit 815 and the 4th pin 504, and end points Change-over circuit 541 couples the first rectification output end 511 and the second rectification output end 512.Similarly, ballast compatible circuit 1590 is detectd The external drive signal that is inputted by the 3rd pin 503 or the 4th pin 504 is surveyed, according to the frequency of signal to determine whether electricity Sub-ballast is provided.

Furthermore, the present embodiment can also change the rectification circuit 810 as shown in the first rectification circuit 510 using Fig. 7 C, and will Ballast compatible circuit 1590 is coupled between rectification unit 815 and end points change-over circuit 541.

Figure 15 C are referred to, are the circuit box schematic diagram of the ballast compatible circuit 1590 according to the application preferred embodiment. Ballast compatible circuit 1590 includes circuit for detecting 1590a and is coupled to circuit for detecting 1590a switching circuit 1590b.Switching Circuit 1590b couples the first switch terminal 1591 and the second switch terminal 1592.Circuit for detecting 1590a couples sense terminal 1593 and 1594 To detect the signal for flowing through sense terminal 1593 and 1594.Or, sense terminal 1593 and 1594 can also be omitted and be commonly coupled to First switch terminal 1591 and the second switch terminal 1592 flow through the signal of the first switch terminal 1591 and the second switch terminal 1592 with detecting. Therefore, sense terminal 1593 and 1594 is represented by dotted lines in schema.In the present embodiment, the first switch terminal 1591 or the second switch terminal 1592 can be coupled to any one in the first pin 501, the second pin 502, the 3rd pin 503, the 4th pin 504, to receive The external drive signal inputted by any pin.

Furthermore, switching circuit 1590b is controlled by circuit for detecting 1590a, and switching circuit 1590b is according to circuit for detecting 1590a On or off is between the first switch terminal 1591 and the second switch terminal 1592.When external drive signal is high frequency ac signal When, switching circuit 1590b ends the external circuit or switching circuit for external drive signal is flowed through ballast compatible circuit 1590 Circuit in parallel 1590b, such as circuit for detecting 1590a；When external drive signal is low-frequency ac signal, civil power or direct current During source, switching circuit 1590b conductings make the external circuit or switching circuit of external drive signal bypass ballast compatible circuit 1590 Circuit in parallel 1590b.

Figure 15 D are referred to, are the circuit diagram of the ballast circuit for detecting 1690 according to the application preferred embodiment.Ballast Circuit for detecting 1690 includes circuit for detecting 1690a and switching circuit 1690b, is coupled to the first switch terminal 1591 and the second switching Between end 1592.In one embodiment, circuit for detecting 1690a can include frequency decision circuitry, and frequency decision circuitry can include electricity Hold 1698；Frequency decision circuitry is used to produce judged result according to the frequency of external drive signal, produces circuit for detecting 1690a Control signal 1695, to control switching circuit 1690b to selectively turn in the first switch terminal 1591 and the second switch terminal 1592 Between.Wherein, when external drive signal is high frequency ac signal, circuit for detecting 1690a control switching circuit 1690b cut-offs； Conversely, when external drive signal is low-frequency ac signal, circuit for detecting 1690a control switching circuit 1690b conductings.

Specifically, circuit for detecting 1690a includes bidirectional trigger diode 1691, resistance 1692 and 1696 and electric capacity 1693rd, 1697 and 1698.Switching circuit 1690b includes bidirectional triode thyristor 1699 and inductance 1694.

Electric capacity 1698 is coupled between the first switch terminal 1591 and the second switch terminal 1592, and the first switching is flowed through to react End 1591 and second switch terminal 1592 signal and produce detecting voltage.When signal is high-frequency signal, the capacitive reactance of electric capacity 1698 It is at a fairly low, and the detecting voltage produced is fairly small.When signal is low frequency signal or direct current signal, the capacitive reactance of electric capacity 1698 is suitable Height, and the detecting voltage produced is at a relatively high.Resistance 1692 and electric capacity 1693 are series at the two ends of electric capacity 1698, to the institute of electric capacity 1698 The detecting voltage of production is filtered and detects voltage after the tie point of resistance 1692 and electric capacity 1693 produces filtering.Resistance 1692 And high-frequency noise of the filter action system of electric capacity 1693 to filter detecting voltage, with the misoperation for avoiding high-frequency noise from causing. Resistance 1696 and electric capacity 1697 are series at the two ends of electric capacity 1693, and the two-way pole of triggering two is transferred to will detect voltage after filtering One end of pipe 1691.Resistance 1696 and electric capacity 1697 carry out second of filtering to detecting voltage after filtering simultaneously, make circuit for detecting 1690a filter effect is more preferably changed.In general, the capacitance of electric capacity 1697 is less than the capacitance of electric capacity 1693.Resistance 1696 can be with Avoid bidirectional trigger diode 1691 from being extremely zeroed to the tension discharge of electric capacity 1693 in a short time, and prevent that emergency ballast from carrying During for pulse signal to LED, what ballast circuit for detecting 1690 reset between pulse and caused when next pulse is restarted Start delay.Thus, the flashing state caused by start delay can be avoided.

According to different applications and noise filtering demand, electric capacity 1697 can select to omit and bidirectional trigger diode 1691 One end be coupled to the tie point of resistance 1692 and electric capacity 1693 by resistance 1696；Or, resistance 1696 and electric capacity 1697 are same When omit and one end of bidirectional trigger diode 1691 is coupled directly to the tie point of resistance 1692 and electric capacity 1693.Therefore, in figure Resistance 1696 and electric capacity 1697 are represented by dotted lines in formula.The other end of bidirectional trigger diode 1691 is coupled to switching circuit The control end of 1690b bidirectional triode thyristor 1699.Bidirectional trigger diode 1691 according to the signal level size received, with Decide whether that produce control signal 1695 turns on to trigger bidirectional triode thyristor 1699.The first end coupling the of bidirectional triode thyristor 1699 One switch terminal 1591, the second end couples the second switch terminal 1592 by inductance 1694.The effect of inductance 1694 is to protect two-way Controllable silicon 1699 not because flow through the signal of the first switch terminal 1591 and the second switch terminal 1592 exceed maximum switching voltage build-up rate, Under cut-off state repeatedly voltage peak and maximum switching electric current rate of change and damage.

When the signal that the first switch terminal 1591 and the second switch terminal 1592 are received is low-frequency ac signal or direct current signal, The detecting voltage of electric capacity 1698 bidirectional trigger diode 1691 is produced control signal 1695 by sufficiently high come trigger it is two-way can Control silicon 1699.Now, it is short circuit between the first switch terminal 1591 and the second switch terminal 1592, and has bypassed switching circuit 1690b Circuit in parallel, for example：It is connected to circuit between the first switch terminal 1591 and the second switch terminal 1592, circuit for detecting 1690a, electric capacity 1698 etc..

When the signal that the first switch terminal 1591 and the second switch terminal 1592 are received is high frequency ac signal, electric capacity 1698 Detecting voltage e insufficient to make bidirectional trigger diode 1691 produce control signal 1695 to trigger bidirectional triode thyristor 1699.This When, bidirectional triode thyristor 1699 is cut-off, and high frequency ac signal is mainly via the external circuit or circuit for detecting of ballast circuit for detecting 1690a is transmitted.

Therefore, ballast circuit for detecting 1690 may determine that whether the high frequency provided by electric ballast is handed over for the signal of input Signal is flowed, if then making high frequency ac signal flow through external circuit or circuit for detecting 1690a；If otherwise bypassing external circuit or detecing Slowdown monitoring circuit 1690a.

It is worth noting that, electric capacity 1698 can be replaced with the electric capacity in external circuit, such as：Held shown in Fig. 8 A to Fig. 8 C An at least electric capacity for point change-over circuit embodiment, and circuit for detecting 1690a then omits electric capacity 1698, therefore with dotted line table in schema Show.

Figure 15 E are referred to, are the circuit diagram of the ballast circuit for detecting 1790 according to the application preferred embodiment.Ballast Circuit for detecting 1790 includes circuit for detecting 1790a and switching circuit 1790b.Switching circuit 1790b is coupled to the first switch terminal 1591 and second between switch terminal 1592.Circuit for detecting 1790a is coupled between sense terminal 1593 and 1594.In the present embodiment In, circuit for detecting 1790a can also include frequency decision circuitry, and frequency decision circuitry can include inductance 1791 and inductance 1792, frequency Rate decision circuitry can make circuit for detecting 1790a produce control signal 1795 according to the frequency of external drive signal, to control switching Circuit 1790b is selectively turned on.Similarly, when external drive signal is high frequency ac signal, circuit for detecting 1790a controls Switching circuit 1790b ends；Conversely, when external drive signal is low-frequency ac signal, circuit for detecting 1790a control switching electricity Road 1790b is turned on.

Specifically, inductance 1791 and 1792 of the circuit for detecting 1790a comprising mutual inductance, electric capacity 1793 and 1796, resistance 1794 and diode 1797.Switching circuit 1790b includes switching switch 1799.In the present embodiment, switching switch 1799 is p-type Vague and general formula metal-oxide half field effect transistor (P-type Depletion Mode MOSFET), when its gate voltage is higher than a critical electricity It is cut-off during pressure, is conducting during less than the critical voltage.

Inductance 1792 is coupled between sense terminal 1593 and 1594, with mutual according to the signal for flowing through sense terminal 1593 and 1594 Sense makes inductance 1791 produce detecting voltage to inductance 1791.The level for detecting voltage is uprised with the frequency height of signal, become It is low.

When signal be high-frequency signal when, the induction reactance of inductance 1792 is at a relatively high, mutual inductance to inductance 1791 and produce at a relatively high Detect voltage.When signal be low frequency signal or direct current signal when, the induction reactance of inductance 1792 is at a fairly low, mutual inductance to inductance 1791 and produce Raw at a fairly low detecting voltage.One end ground connection of inductance 1791.The electric capacity 1793 and resistance 1794 of series connection are in parallel with inductance 1791, With detecting voltage produced by receiving inductance 1791, and carry out detecting voltage after producing filtering after High frequency filter.Electricity is detected after filtering Pressure charges with producing control signal 1795 after diode 1797 to electric capacity 1796.Because diode 1797 provides the list of electric capacity 1796 To charging, therefore the level of control signal 1795 is the maximum of the detecting voltage of inductance 1791.The coupling switching switch of electric capacity 1796 1799 control end.The first end of switching switch 1799 is respectively coupled to the first switch terminal 1591 and the second switch terminal with the second end 1592。

When the signal that sense terminal 1593 and 1594 is received is low-frequency ac signal or direct current signal, produced by electric capacity 1796 Control signal 1795 less than switching switch 1799 critical voltage and make switching switch 1799 turn on.Now, the first switch terminal 1591 and second be short circuit between switch terminal 1592, and switching circuit 1790b external circuits in parallel have been bypassed, for example：Figure At least electric capacity etc. in the embodiment of end points change-over circuit shown in 8A to Fig. 8 C.

When the signal that sense terminal 1593 and 1594 is received is high frequency ac signal, the control signal produced by electric capacity 1796 1795 make switching switch 1799 and end higher than the critical voltage of switching switch 1799.Now, high frequency ac signal mainly via External circuit is transmitted.

Therefore, ballast circuit for detecting 1790 may determine that whether the high frequency provided by electric ballast is handed over for the signal of input Signal is flowed, if then making high frequency ac signal flow through external circuit；If otherwise bypassing external circuit.

Next ballast circuit for detecting is added in explanation LED, the conducting (bypass) and cut-off of its switching circuit be not (other It is logical) operation.For example, the electric capacity that the first switch terminal 1591 and the coupling of the second switch terminal 1592 are connected with LED, i.e. drive The signal of dynamic LED straight lamps can also flow through this electric capacity.Connected with internal circuit the inside that this electric capacity can be arranged on LED straight lamps Or be connected on outside LED straight lamps.Please referring also to Fig. 6 A, Fig. 6 B or Fig. 6 D, when lamp tube drive circuit 505 is not present, AC power 508 provides low pressure, low-frequency ac drive signal as external drive signal to drive LED straight lamps 500.Now, The switching circuit conducting of ballast circuit for detecting, makes the alternating current drive signal of AC power 508 directly drive the inside of LED straight lamps Circuit.In the presence of lamp tube drive circuit 505, lamp tube drive circuit 505 produces high pressure, high frequency ac signal to drive LED straight tubes Lamp 500.Now, the switching circuit cut-off of ballast circuit for detecting, this electric capacity is connected with the equivalent capacity inside LED straight lamps, because And reach the effect of capacitance partial pressure.Thereby, the voltage for being applied to LED straight lamp internal circuits can be made relatively low (for example：Fall In the range of 100-277V) to avoid internal circuit from being damaged because of high pressure.Or, the first switch terminal 1591 and the second switch terminal Electric capacity in end points change-over circuit embodiment shown in 1592 coupling Fig. 8 A to Fig. 8 C, flows through the signal of half-wave tie point 819 Simultaneously flow through this electric capacity, for example, Fig. 8 A electric capacity 642, Fig. 8 C electric capacity 842.When lamp tube drive circuit 505 produces height When pressure, high frequency ac signal input, switching circuit cut-off allows electric capacity to reach partial pressure effect；When the low-frequency ac of civil power is believed Number or battery direct current signal input when, switching circuit conducting is to bypass electric capacity.

In addition, when the AC power 508 of civil power provides low pressure, low-frequency ac drive signal as external drive signal to drive During dynamic LED straight lamps 500, LED straight lamps 500 may have the excessive situation of leakage current.Now, the switching of ballast circuit for detecting is opened It is relatively low that the ON-OFF frequency of pass can be set, i.e., less than 50 or 60Hz.That is, provided when AC power 508 The high frequency ac signal that low-frequency ac signal or lamp tube drive circuit 505 are provided, switching circuit is cut-off；It is straight when battery When flowing signal input, switching circuit just turns on to bypass electric capacity.The low-frequency ac signal provided in AC power 50 and switching When circuit is cut-off, the effect of capacitance partial pressure can cause the undertension that LED illumination module 530 received and can not normal luminous And open circuit is presented.

It is worth noting that, switching circuit can include multiple changeover modules, come simultaneously with providing more than two switch terminals The multiple electric capacity in parallel of connection connection are (for example：Fig. 8 A electric capacity 645 and 646, Fig. 8 A electric capacity 643,645 and 646, Fig. 8 B electricity Hold 743 and 744 and/or 745 and 746, Fig. 8 C electric capacity 843 and 844, Fig. 8 C electric capacity 845 and 846, Fig. 8 C electric capacity 842, 843 and 844, Fig. 8 C electric capacity 842,845 and 846, Fig. 8 C electric capacity 842,843,844,845 and 846), come actually reach by The effect of the equivalent multiple electric capacity bypass connected with LED straight lamps.

In one embodiment, ballast circuit for detecting can be used in combination with Figure 11 E switching judging circuit 790, circuit for detecting 1590a can include frequency decision circuitry 795, resistance 793 and switching switch 794.One end of electric capacity 791 and resistance 793 can be coupled In sense terminal 1593, one end of resistance 792 and switching switch 794 can be coupled to sense terminal 1594, and frequency decision circuitry 795 can root The judged result for representing frequency height is produced according to the frequency for the external drive signal for flowing through sense terminal 1593 and 1594.Or, Sense terminal 1593 and 1594 can be omitted, one end of electric capacity 791 and resistance 793 can be commonly coupled to the first switch terminal 1591, electricity Resistance 792 can be commonly coupled to the second switch terminal 1592 with switching switch 794, and frequency decision circuitry 795 can be cut according to flowing through first The frequency for changing the external drive signal of the switch terminal 1592 of end 1591 and second produces expression aforementioned frequencies height judged result.

Furthermore, switching circuit 1590b can be coupled to the tie point of resistance 793 and switching switch 794, resistance 793 and switching The judging result signal S585 that the tie point of switch 794 is produced can make switching circuit 1590b as control signal 1695,1795 The electricity of the inversion signal (i.e. judging result signal S585) for the judging result signal S580 that can be produced according to frequency decision circuitry 795 Flat height on or off.

Wherein, when the frequency of external drive signal is higher, judging result signal S585 level is lower；Conversely, when outside The frequency of drive signal is lower, and judging result signal S585 level is then higher.Therefore, when external drive signal is high frequency (example Such as：More than 20KHz), the signal of high pressure when, judging result signal S585 is low level, and low level cuts switching circuit 1590b Only, for example, low level e insufficient to triggering bidirectional triode thyristor 1699 or switching switch 1799 is turned on, now bidirectional triode thyristor 1699 or switching switch 1799 be cut-off, be that the external drive signal of high frequency ac signal is main via ballast compatible circuit 1590 External circuit or switching circuit 1590b it is in parallel circuit (for example, circuit for detecting 1690a) transmission；When external drive signal During for low frequency, the signal of low pressure, judging result signal S585 is high level, and now switching circuit 1590b is turned on；For example, High level can trigger bidirectional triode thyristor 1699 or switching switch 1799 is turned on, now the first switch terminal 1591 and the second switch terminal Be between 1592 short circuit, be high frequency ac signal external drive signal bypassed ballast compatible circuit 1590 external circuit or Circuit in parallel switching circuit 1690b, for example：It is connected to the electricity between the first switch terminal 1591 and the second switch terminal 1592 Road, circuit for detecting 1690a, electric capacity 1698 etc..

Further, also illustrate herein the application ballast circuit for detecting how with the pattern switching shown in Figure 11 A to Figure 11 C Circuit 580 is used in combination.Switching circuit 580 replaces in mode by switching circuit 1590b in ballast compatible circuit 1590.Ballast Circuit for detecting 1590a in compatible circuit 1590 be coupled to input the first pin 501, the second pin 502, the 3rd pin 503 and One of 4th pin 504, to detect via the first pin 501, the second pin 502, the 3rd pin 503 and the 4th pin 504 are input to the signal of LED.Circuit for detecting 1590a produces control signal according to the frequency of signal, switches for controlling the mode Circuit 580 is first mode or second mode.

For example, when signal is higher than setting pattern switching frequency for high-frequency signal, for example：By lamp tube drive circuit 505 high-frequency signals provided, circuit for detecting 1590a control signal will make mode switching circuit 580 be second mode, will The LED module 630 is inputted after at least part component of filtered signal or rectified signal the bypass drive circuit 1530；When When signal is less than setting pattern switching frequency for low frequency or direct current signal, for example：The low frequency or straight that civil power or battery are provided Signal is flowed, circuit for detecting 1590a control signal will make mode switching circuit 580 be first mode, and will believe after the filtering Number or rectified signal directly input the drive circuit 1530, make drive circuit 1530 receive rectified signal or filtering signal with LED module 630 is driven to light.

The application LED straight lamps in each embodiment realization with as previously described.Need to point out, in each implementation In example, for same LED straight lamp, " fluorescent tube has strengthening section structure ", " lamp plate use bendable circuit soft board ", " lamp holder is to include the lamp holder of heat-conducting part ", " power supply has the sub-assembly of length circuit board ", " rectification circuit ", " filter circuit ", " drive circuit ", " end points change-over circuit ", " anti-flicker circuit ", " protection circuit ", " mode switching circuit ", " overvoltage protection electricity Road ", " ballast circuit for detecting ", " ballast compatible circuit ", " filament artificial circuit ", etc. in feature, therein one can be only included Individual or multiple technical characteristics.

In addition, the content system on " fluorescent tube has strengthening section structure " can be selected from and include the correlation technique of its in embodiment One of feature or its combination, wherein the content system on " lamp plate uses bendable circuit soft board " can be selected from and include One of correlation technique feature of its in embodiment or its combination, wherein the content system on " tube inner wall scribbles reflectance coating " It can be selected from and include one of correlation technique feature of its in embodiment or its combination, wherein on " lamp holder is to include leading The content system of the lamp holder in hot portion ", which can be selected from, includes one of correlation technique feature of its in embodiment or its combination, its In can be selected from that to include the correlation technique of its in embodiment special on the content system of " lamp holder is to include the lamp holder of magnetic conductive metal piece " One of levy or its combination, wherein the content system on " light source has support " can be selected from and include the phase of its in embodiment Close one of technical characteristic or its combination.

For example, in fluorescent tube has strengthening section structure, the fluorescent tube includes body zone and is located at the body zone two respectively The end region at end, has a transition region, the two ends of the transition region are all arc, institute between the end region and the body zone State end region and be respectively sheathed on a lamp holder, the external diameter of at least one end region is less than the external diameter of the body zone, and correspondence institute The lamp holder that external diameter is less than the body zone external diameter is stated, its external diameter is equal with the external diameter of the body zone.

For example, in lamp plate uses bendable circuit soft board, the output end of the bendable circuit soft board and the power supply Between by wire routing connect or the bendable circuit soft board and the output end of the power supply between weld.In addition, described Bendable circuit soft board includes the storehouse of a dielectric layer and a line layer；Bendable circuit soft board can be in surface coating printing ink material The circuit protecting layer of material, and the function of reflectance coating is realized by the width of increase circumferentially.

For example, in Power Management Design, the sub-assembly of length circuit board has a long circuit board and a short circuit board, long circuit Plate and short circuit board are fitted each other to be fixed through gluing mode, and short circuit board is located at long circuit board adjacent peripheral edges.On short circuit board With power supply module, power supply is monolithically fabricated.

In power supply module design, described external drive signal can be low-frequency ac signal (for example：Civil power is carried For), high frequency ac signal (for example：Electric ballast is provided) or direct current signal is (for example：Battery is provided or external driving Power supply), and LED straight lamps can be inputted with the driving framework of the driving framework of single ended power supply or Double-End Source.In both-end electricity The driving framework in source, can support that wherein one end is used only in the way of as single ended power supply to receive external drive signal.

When direct current signal is as external drive signal, the power supply module of LED straight lamps can omit rectification circuit.

Can be with single rectification unit, or double rectification units in the rectification circuit design of power supply module.Double rectifications The first rectification unit and the second rectification unit in circuit are respectively with configuring the pin coupling in the two ends lamp holder of LED straight lamps. Single rectification unit is applicable to the driving framework of single ended power supply, and double rectification units are applied to single ended power supply and Double-End Source Drive framework.And when being configured with an at least rectification unit, go for low-frequency ac signal, high frequency ac signal or straight Flow the drive environment of signal.

Single rectification unit can be half-wave rectifying circuit or full bridge rectifier.Double rectification units can be that double half-waves are whole The combination of current circuit, double-full-bridge rectifier circuit or half-wave rectifying circuit and full bridge rectifier each one.

Can be single-ended pair of pin (totally two pins, other end non-connection pin), double in the pin design of LED straight lamps Hold each single pin (totally two pins), the framework of each pair of pin of both-end (totally four pins).In single-ended pair of pin and each list of both-end Under the framework of pin, the rectification circuit design of single rectification circuit is applicable to.It is applicable under the framework of each pair of pin of both-end Designed in the rectification circuit of double rectification circuits, and outside drive is received using each any pin of both-end or any single-ended double pins Dynamic signal.

In the filter circuit design of power supply module, can have Single Capacitance or π type filter circuits, to filter after rectification Radio-frequency component in signal, and the direct current signal for providing low ripple is filtered signal.Filter circuit can also include LC filtering Circuit, so that high impedance is presented to specific frequency.Furthermore, filter circuit can more include the filter being coupled between pin and rectification circuit Ripple unit, to reduce the electromagnetic interference caused by the circuit of LED.When direct current signal is as external drive signal, LED straight tubes The power supply module of lamp can omit filter circuit.

In the LED illumination module design of power supply module, comprising LED module or LED module and driving only can be included Circuit.To ensure that the voltage in LED illumination module is unlikely overvoltage can also be occurred for mu balanced circuit and LED illumination wired in parallel. Mu balanced circuit can be voltage clamping circuit, for example：Zener diode, bi-directional voltage stabilizing pipe etc..When rectification circuit includes condenser network, An electric capacity can be connected two-by-two between in a pin at each end of both-end and a pin of the other end, to be carried out with condenser network Partial pressure act on and as mu balanced circuit.

In the design of LED module is only included, when high frequency ac signal is as external drive signal, an at least rectified current Road includes condenser network (that is, comprising more than one electric capacity), connects, makes with the full-bridge or half-wave rectifying circuit in rectification circuit Condenser network is equivalent to impedance as current regulating circuit and to adjust the electric current of LED module under high frequency ac signal.Thereby, When different electric ballasts provides the high frequency ac signal of different voltages, the electric current of LED module can be adjusted in default The unlikely situation for occurring excessively stream in current range.Furthermore it is possible to energy circuit is released in extra increase, and it is in parallel with LED module, in outside Drive signal stops after providing, auxiliary by filter circuit release can, with caused by reducing filter circuit or other circuits Resonance causes the situation of LED module flashing.In comprising LED module and drive circuit, drive circuit can be that direct current turns DC boosting change-over circuit, DC-DC decompression converting circuit or DC-DC lifting voltage conversion circuit.Drive circuit system To the electric current of LED module is stable in setting electric current value, it can also be heightened according to the high or low of external drive signal come correspondence Or turn down setting electric current value.Furthermore it is possible to which additionally increase mode selector switch makes electric current between LED module and drive circuit LED module is directly inputted by filter circuit or LED module is inputted after overdrive circuit.

Furthermore it is possible to additionally increase protection circuit to protect LED module.Protection circuit can detect the electric current of LED module And/or voltage starts corresponding excessively stream or overvoltage protection to correspond to.

In the ballast circuit for detecting design of power supply module, ballast circuit for detecting and equivalent upper and LED illumination block coupled in series Electric capacity it is in parallel, and external drive signal is determined according to the frequency of external drive signal flow through electric capacity or flow through ballast detecting electricity Road (bypasses electric capacity).Above-mentioned electric capacity can be the condenser network of rectification circuit.

Power supply module filament artificial circuit design in, can be single shunt capacitance and resistance or two-in-parallel electric capacity and Resistance or negative temperature parameter circuit.Filament artificial circuit is applied to program preheating start-up type electric ballast, can avoid program Preheating start-up type electric ballast judges the problem of filament is abnormal, improves the compatibility to program preheating start-up type electric ballast Property.And filament artificial circuit has little influence on instantaneous starting type (Instant Start) electric ballast, quick-starting direct The compatibility of other electric ballasts such as (Rapid Start) electric ballast.

In the ballast compatible circuit design of power supply module, it can connect or be shone with filter circuit and LED with rectification circuit Bright wired in parallel.In the design connected with rectification circuit, the original state of ballast compatible circuit is cut-off, and is prolonged by setting Turned on after the slow time.In the design with filter circuit and LED illumination wired in parallel, the original state of ballast compatible circuit is to lead It is logical, and end after setting time delay.Ballast compatible circuit can make instantaneous starting type electric ballast in initial start stage It can smoothly start, and improve the compatibility to instantaneous starting type electric ballast.And ballast compatible circuit have little influence on it is pre- The compatibility of other electric ballasts such as thermal starting type electric ballast, quick-starting direct electric ballast.

In the LED module design of power supply module, LED module can be (that is, single comprising the multi-string LED component being connected in parallel to each other One LED chip, or multiple LED modules with different colors chips composition LED groups) string, the LED component in each LED component string can be each other Connect and form netted connection.

That is, features described above can be made to arbitrary permutation and combination, and for the improvement of LED straight lamps.

Claims

1. a kind of LED straight lamps, it is characterised in that include：

Fluorescent tube, with least two pins, to receive external drive signal；

Rectification circuit, carries out rectification to produce rectified signal to the external drive signal to reception；

LED illumination module, comprising LED module, the LED illumination module is to luminous；And

Ballast compatible circuit, is coupled between the pin and the LED illumination module, and the ballast compatible circuit includes detecting Circuit, the circuit for detecting detects the external drive signal, and whether judge the external drive signal is high frequency or high pressure letter Number, when the external drive signal is high frequency or high-voltage signal, the ballast compatible circuit turns on LED module.

2. LED straight lamps according to claim 1, it is characterised in that the ballast compatible circuit is also included, and switching is opened Close, be coupled to the circuit for detecting, the circuit for detecting is coupled to switching switch comprising voltage decision circuitry, and the voltage judges Circuit according to the electrical level judging of the rectified signal external drive signal whether be high-voltage signal to produce judged result, institute Switching switch is stated according to the judged result on or off, wherein, the switching switch conduction turns on LED module, described Switching switch cut-off makes LED module open a way.

3. LED straight lamps according to claim 2, it is characterised in that the circuit for detecting includes sampling branch road, the town Compatible circuit is flowed also comprising control circuit and switching switch, and the control circuit is coupled between sampling branch road and switching switch, The sampling branch road is sampled the level of the rectified signal, and the control circuit judges whether is the signal sampled according to sampled result For high-voltage signal, and the switching switch conduction or cut-off are controlled, wherein, the switching switch conduction leads the LED module Logical, the switching switch cut-off makes the LED module open a way.

4. LED straight lamps according to claim 1, it is characterised in that the ballast compatible circuit is also switched comprising switching, The circuit for detecting is coupled to, the circuit for detecting is coupled to switching switch comprising frequency decision circuitry, and the frequency judges electricity Road according to the frequency of the external drive signal judge the external drive signal whether be high-frequency signal to produce judged result, The switching is switched according to the judged result on or off, wherein, the switching switch conduction turns on LED module, institute Stating switching switch cut-off makes LED module open a way.

5. LED straight lamps according to claim 1, it is characterised in that the external drive signal is in original state Low-voltage ac signal, after the delayed time, the external drive signal is changed into high-frequency high-voltage signal by low-voltage ac signal.

6. LED straight lamps according to claim 1, it is characterised in that when the circuit for detecting detects the rectified signal Level be higher than high decision level when, the external drive signal be high-frequency high-voltage signal；When circuit for detecting detecting is described When the level of rectified signal is between the scope of high decision level and low decision level, the ballast compatible circuit makes LED module Open circuit；When the level that the circuit for detecting detects the rectified signal is less than the low decision level, the compatible electricity of the ballast Road turns on LED module；Wherein described high decision level is higher than the low decision level.

7. LED straight lamps according to claim 6, the external drive signal comes from Inductive ballast, the rectification The level of signal is less than the low decision level.

8. LED straight lamps according to claim 1, it is characterised in that also comprising electric capacity and/or resistance, the fluorescent tube One end has the first pin and the second pin, and the electric capacity and/or resistance are coupled to first pin and second pin Between.

9. LED straight lamps according to claim 1, it is characterised in that be also coupled to the fluorescent tube comprising current limiting element An at least pin for first end and an at least pin at the second end of the fluorescent tube, and the current limiting element is coupled to the rectification Circuit, the current limiting element receives the external drive signal.

10. LED straight lamps according to claim 1, it is characterised in that the circuit for detecting is coupled to whole comprising thyratron Between current circuit and the LED module, when the external drive signal is high frequency or high-voltage signal, the thyratron conducting is no The then thyratron cut-off.

11. LED straight lamps according to claim 10, it is characterised in that the ballast compatible circuit also comprising transistor, Inductance and resistance, the collector of the transistor couple the negative terminal of the LED module, and the inductance and the thyratron are series at institute State between the negative terminal of LED module and the base stage of the transistor, the emitter-base bandgap grading of the transistor couples the rectification circuit, the electricity Resistance is coupled between the base stage of the transistor and emitter-base bandgap grading, after the thyratron is turned on, flows through shunting and the stream of the inductance Shunting through the transistor maintains the conducting state of the thyratron.

12. LED straight lamps according to claim 11, it is characterised in that the ballast compatible circuit also includes electric capacity, electricity The collector of transistor described in one end coupling of appearance, the other end couples the base stage of the transistor.

13. LED straight lamps according to claim 1, it is characterised in that also comprising lamp plate and circuit board, the lamp plate is set On the inner surface for being placed in the fluorescent tube, the circuit board is placed in the lamp holder of one end of the fluorescent tube, the lamp plate or the electricity Road plate includes two pads, and the patch capacitor of the LED straight lamps is arranged at the lamp plate or described by two pad The lamp plate or the circuit board between circuit board, two pad include slotted eye.

14. LED straight lamps according to claim 1, it is characterised in that also comprising filter circuit and overvoltage crowbar, The filter circuit is coupled to the rectification circuit to be filtered rectification circuit to produce filtering signal, and the filtered electrical Two output ends on road are respectively coupled to the anode and negative terminal of the LED module, the overvoltage crowbar comprising switching switch and Resistance, the resistance and switching switch are series between two output ends of the filter circuit, the switching switch basis The level conducting of the filtering signal.

15. LED straight lamps according to claim 1, it is characterised in that the circuit for detecting includes frequency decision circuitry, To detect the frequency of the external drive signal, and judge whether the external drive signal is high frequency ac signal；When described When external drive signal is high frequency ac signal, the ballast circuit for detecting make external drive signal via the circuit for detecting or The external circuit of the ballast circuit for detecting flows through LED illumination module, external drive signal is bypassed the circuit for detecting Or the LED illumination module is flowed through after the external circuit.

16. LED straight lamps according to claim 15, it is characterised in that the ballast circuit for detecting, also comprising switching electricity The road circuit for detecting in parallel, the switching circuit is controlled by circuit for detecting, described when the signal is high frequency ac signal Switching circuit cut-off makes the external drive signal flow through the external circuit or switching circuit circuit in parallel, otherwise The switching circuit conducting makes the external drive signal bypass the external circuit or switching circuit circuit in parallel.

17. LED straight lamps according to claim 15, it is characterised in that the LED illumination module is also comprising driving electricity Road, to drive the LED module, the ballast compatible circuit, also comprising mode switching circuit, the circuit for detecting is according to described The frequency of external drive signal produces control signal, and switching circuit is first mode or second mode for controlling the mode；The mould Formula switching circuit in the flrst mode, makes the drive circuit receive the rectified signal to drive LED module；The pattern is cut Change circuit under the second mode, make the external drive signal bypass at least part component of the drive circuit to drive LED Module.

18. LED straight lamps according to claim 15, it is characterised in that the ballast compatible circuit is also comprising switching electricity Road, frequency decision circuitry switching circuit on or off according to the FREQUENCY CONTROL of the external drive signal, works as institute When stating external drive signal for high frequency ac signal, the switching switch ends, otherwise the switching switch conduction.

19. LED straight lamps according to claim 18, it is characterised in that the frequency decision circuitry is coupled comprising electric capacity In the pin with according to external drive signal generation voltage；When the external drive signal is high-frequency signal, the electric capacity The low-voltage of generation makes switching switch cut-off；When the external drive signal is low frequency signal or direct current signal, the electric capacity The high voltage of generation makes switching switch conduction.

20. LED straight lamps according to claim 18, it is characterised in that the frequency decision circuitry comprising mutual inductance the One inductance and the second inductance, first inductance be coupled to the pin with by the mutual inductance of external drive signal to described second electricity Sense, makes second inductance produce voltage；When the external drive signal is high-frequency signal, the height that second inductance is produced Voltage makes switching switch cut-off；When the external drive signal is low frequency signal or direct current signal, second inductance is produced Low-voltage make switching switch conduction.

21. LED straight lamps according to claim 15, it is characterised in that be also coupled to the fluorescent tube comprising current limiting element First end an at least pin and the fluorescent tube the second end an at least pin, and the current limiting element be coupled to it is described whole Current circuit, the current limiting element receives the external drive signal.

22. LED straight lamps according to claim 15, it is characterised in that also comprising electric capacity and/or resistance, the fluorescent tube One end have the first pin and the second pin, the electric capacity and/or resistance are coupled to first pin and connect with described second Between pin.

23. LED straight lamps according to claim 15, it is characterised in that also comprising lamp plate and circuit board, the lamp plate is set On the inner surface for being placed in the fluorescent tube, the circuit board is placed in the lamp holder of described fluorescent tube one end, the lamp plate or the electricity Road plate includes two pads, and the patch capacitor of the LED straight lamps is arranged at the lamp plate or described by two pad The lamp plate or the circuit board between circuit board, two pad include slotted eye.

24. the LED straight lamps according to claim 1 or 15, it is characterised in that the frequency of the high frequency ac signal between 20KHz is between 50KHz.