CN202353853U

CN202353853U - LED (light-emitting diode) tube circuit compatible with traditional lamp base

Info

Publication number: CN202353853U
Application number: CN2011203957435U
Authority: CN
Inventors: 张建召
Original assignee: Shenzhen Alite Optoelectronic Technology Co Ltd
Current assignee: Shenzhen Alite Optoelectronic Technology Co Ltd
Priority date: 2011-10-17
Filing date: 2011-10-17
Publication date: 2012-07-25
Anticipated expiration: 2021-10-17

Abstract

The utility model discloses an LED (light-emitting diode) tube circuit compatible with the traditional lamp base. The technical scheme is as follows: a circuit composed of eight superfast diodes is adopted, namely, four input terminals of the two rectifier bridges are respectively connected onto four pins of the tube, output terminals are connected in parallel to form a rectified output direct current terminal, a combination manner that three fuses and two piezoresistors are combined is adopted, so that the LED tube circuit is compatible with the traditional tube lamp, a ballast or a starter does not need to be removed, and the short circuit and overvoltage protection function is achieved. An energy storing circuit after rectification is charged by adopting a series charging and parallel discharging circuit which is composed of two energy storing capacitors and three superfast diodes, the energy storing circuit is supplied to one traditional BUCK voltage reduction switching circuit, and finally an appropriate LED string light is driven. Thus, completeness of the original lighting fixture is ensured, and safe operation can be realized without a professional wireman, thus the LED tube circuit is convenient and time-saving.

Description

The LED tube circuit of compatible prior lamp holder

Technical field

The utility model relates to the LED lighting technical field, relates in particular to a kind of LED tube circuit of compatible prior lamp holder.

Background technology

LED (light-emitting diode, Light Emitting Diode) has low driving voltage, and response rapidly; Power consumption is low; High light efficiency reaches the characteristic that does not contain the contaminated environment material, therefore relies on the LED lighting that LED lamp pearl is developed, and has the trend that replaces the traditional lighting light fixture.

The development course of illumination is: carrying out the transition to the fluorescent lamp that adopts ultraviolet ray excited light-emitting phosphor from incandescent lamp, to the LED illumination that occurred in recent years, all is the big progress of tool from environmental protection and energy-conservation aspect.In the fluorescent tube application, conventional fluorescent powder fluorescent tube occupies the very big market share at present, because than conventional incandescent, it is higher, promptly brighter that the fluorescent material fluorescent tube has under the situation of equal-wattage loss a light efficiency.Fluorescent tube adopts the assembling light fixture that matches in addition, and it is also more attractive in appearance that outward appearance seems.

But traditional fluorescent material fluorescent tube belongs to the low-pressure gaseous discharge lamp tool, is filled with a certain amount of mercury vapour in the inside of fluorescent tube, utilizes mercury vapour to excite down at high voltage, discharges ultraviolet ray excited tube wall fluorescent material and luminous.For environmental protection, mercury element is a kind of contaminated environment material, particularly after conventional fluorescent powder fluorescent tube is scrapped, if recycling is improper, with the severe contamination that causes environment.

Therefore the LED fluorescent tube of environmental protection and energy saving has the trend that replaces conventional fluorescent powder fluorescent tube gradually, on main performance, for example under unidimensional condition; There is the advantage that surmounts traditional tube fully light efficiency and energy-conservation aspect; Because the mode of operation of the mode of operation of LED and fluorescent material fluorescent tube is different fully, they can not directly change the two, and conventional fluorescent powder fluorescent tube is for can operate as normal; Except switch; Also must use important spare parts such as ballast and starter, these parts are unnecessary to LED fluorescent tube mains lighting supply, particularly starter.

See also Fig. 1, Fig. 1 is the mode of connection of common LED lamp tube drive power, and among the figure: 1 is the live wire input, and 2 is the zero line input; 3 for opening or close the switch of light fixture, and 4 is the electric ballast that is formed by the inductance coil coiling, is used to limit lamp current, and 5 for having 4 introducing electrode LED fluorescent tubes; Its structure and conventional fluorescent lamps tube exterior similar, 6 is starter, its internal structure is a neon bulb and a thin-film capacitor; Be used to start fluorescent tube, 7 are the rectifier bridge heap, and 4 rectifier diodes (D1-D4) are contained in its inside; 8 is piezo-resistance M1, and it is used for absorbing the instantaneous pressure pulse that circuit produces, protection bridge heap; 9 for preventing that accidental short circuit or circuit overloads from causing the fuse F1 of fire, and 10 is the DC-DC transducer, and it is used to change HVDC for being fit to the device that LED uses.Because traditional tube has four lamp bases, so the LED fluorescent tube that replaces using also is four lamp bases, owing to can't accurately judge the end pin set PIN1 in the actual installation process; The position that PIN2 and other end pin set PIN3, PIN4 are accurately corresponding mutually is so have only 2 lead-in wires in the actual introducing of the power supply lead wire of the built-in driving of LED fluorescent tube; PIN1 wherein, the PIN2 short circuit is an electrode, PIN3; The PIN4 short circuit is another electrode, like this as long as any stitch is charged.Like this in case close a switch 3, civil power 1 electric current process ballast 4, entering PIN1; 2 flow into built-in power drive axle heap exchanges input one end, and process rectifier diode D4 gets into "+" positive pole of DC-DC transducer 10, and "-" negative pole through the DC-DC transducer flows out to D1 after inter-process is utilized then; Through fuse F1, get into PIN3,4; Get back to the civil power 2 of input at last, constitute a complete loops.Because used civil power is an alternating current, its sense of current and size change in time and change, so the situation of half period has only been narrated at this place, following half period is because of current opposite in direction, thus the similar omission of process.At this moment, the ballast 4 in the circuit can also can keep in short circuit, if keep because ballast 4 is made up of coil, coil can the additive decrementation electric energy because there being resistance, influences certain luminous efficiency so keep meeting.But the starter 6 of this moment just must be taken away, because the inside of starter 6 is made up of little thin-film capacitor of a neon bulb parallel connection; The similar switch of the principle of neon bulb, this is that conventional fluorescent powder fluorescent tube starts necessary device, if but do not take away at this moment; Because it is the incoming line two ends of inner LED driving power that two of starter 6 corrects, there is a very high voltage at these two ends, in case energising; Starter 6 inner neon bulbs are experienced voltage and are begun glow discharge, generate heat and short circuit rapidly, and this is because neon bulb inside is the switch contact that a bimetal leaf is formed; Cold conditions is an off-state, is equivalent to open circuit.It is then crooked to be heated.In case the crooked short circuit of this bimetal leaf, then glow discharge disappears, and bimetal leaf cools off and restores to the original state.And then the glow discharge short circuit, so repeatedly, cause inner led drive circuit to can not get stable input voltage and produce intermittent operation, being reflected in outside phenomenon is exactly that the LED fluorescent tube is coruscated luminous.So the present LED driving power of producing all is these type of, need in direct substitution conventional fluorescent powder fluorescent tube, must take away starter, so just destroyed the safety certification requirement of this tube lamp, also destroyed the integrality of this tube lamp.

In addition; At present aspect the electric ballast light fixture of using the fluorescent material fluorescent tube; In typical application figure, still use 4 pins when lighting conventional fluorescent powder fluorescent tube, and existing led drive circuit is because have only two incoming line leading-in ends; Need the same end stitch of the inner fluorescent tube of short circuit, so when cooperating circuit of electronic ballast, can't start.Must all remove just can operate as normal behind the electronic transformer circuit.Operation not only needs electrician's operation of specialty like this, and the circuit that is removed also is difficult to use once more.

The utility model content

To the weak point that exists in the above-mentioned technology; The utility model provides a kind of LED tube circuit of compatible prior lamp holder; Can use the LED fluorescent tube directly to replace existing fluorescent material fluorescent tube, and need not change any structure and the part of light fixture, comprise electric ballast and starter.

For realizing above-mentioned purpose; The utility model provides a kind of LED tube circuit of compatible prior lamp holder; Comprise live wire input, zero line input, electric ballast, starter, have 4 and introduce electrode LED fluorescent tubes, first rectifier bridge heap, second rectifier bridge heap, first piezo-resistance, second piezo-resistance, fill out paddy circuit unit and DC-DC transducer and LED lamp string location; The live wire input is connected to first electrode of LED fluorescent tube through electric ballast; The zero line input connects the third electrode of LED fluorescent tube; Be connected starter between second electrode and the 4th electrode, first piezo-resistance is connected between the third electrode and the 4th electrode of LED fluorescent tube, and second piezo-resistance is connected between first electrode and second electrode of LED fluorescent tube; First rectifier bridge heap comprises first diode, second diode, the 3rd diode and the 4th diode; Second rectifier bridge heap comprises the 5th diode, the 6th diode, the 7th diode and the 8th diode; The positive pole of the negative pole of first diode and second diode is connected the back and is connected with the third electrode of LED fluorescent tube; The positive pole of the negative pole of the 3rd diode and the 4th diode is connected the back and is connected with the 4th electrode of LED fluorescent tube; The positive pole of the negative pole of the 5th diode and the 6th diode is connected the back and is connected with first electrode of LED fluorescent tube, and the positive pole of the negative pole of the 7th diode and the 8th diode is connected the back and is connected with second electrode of LED fluorescent tube; Fill out the paddy circuit unit and comprise first electric capacity, second appearance, the 9th diode, the tenth diode, the 11 diode; The said paddy circuit unit of filling out has positive pole and negative pole; The tie point that the positive pole of first electric capacity is connected with the negative pole of the 11 diode is a positive pole of filling out paddy circuit unit power supply; The tie point that the positive pole of the 9th diode is connected with the negative pole of second electric capacity is a negative pole of filling out the paddy circuit unit; The negative pole of first electric capacity also is connected with the positive pole of the tenth diode with the tie point of the 9th diode, and the positive pole of the 11 diode also is connected with the negative pole of the tenth diode with the tie point of the positive pole of second electric capacity; The tie point that the positive pole of the positive pole of first diode and the 3rd diode is connected is connected to the negative pole of filling out the paddy circuit unit; After being connected, the positive pole of the positive pole of the 5th diode and the 7th diode is connected to the negative pole of filling out the paddy circuit unit; Be connected to the positive pole of filling out the paddy circuit unit after the negative pole of the negative pole of second diode and the 4th diode is connected, the tie point that the negative pole of the negative pole of the 6th diode and the 8th diode is connected is connected to the positive pole of filling out the paddy circuit unit; The positive pole of filling out the paddy circuit unit is connected with the positive pole of DC-DC transducer and LED lamp string location, and the negative pole of filling out the paddy circuit unit is connected with the negative pole of DC-DC transducer and LED lamp string location.

Wherein, the LED tube circuit of said compatible prior lamp holder also comprises a switch that is used for the said LED fluorescent tube of opening and closing, and said switch is connected between live wire input and the electric ballast.

Wherein, The LED tube circuit of said compatible prior lamp holder also has first fuse, second fuse and the 3rd fuse; The 5th diode cathode and the tie point of the 6th diode cathode are connected first electrode of LED fluorescent tube through the 3rd fuse; The tie point of first diode cathode and second diode cathode is connected the third electrode of LED fluorescent tube through first fuse, and the 3rd diode cathode and the tie point of the 4th diode cathode are connected the 4th electrode of LED fluorescent tube through second fuse.

The beneficial effect of the utility model is: compared with prior art; The LED tube circuit of the compatible prior lamp holder that the utility model provides; The circuit that adopts eight supper-fast diodes to form is appreciated that four inputs of these two rectifier bridges are connected on respectively on four stitch of fluorescent tube in order to have formed two rectifier bridges; The output parallel connection forms the dc terminal of rectification output; And the compound mode that has adopted three fuses and two piezo-resistances promptly can compatible existing traditional tube light fixture, needn't dismantle ballast and starter, and have short circuit and over-voltage protecting function.Accumulator after the rectification adopts two storage capacitors and three serial connection charges that supper-fast diode is formed, and the parallel discharge circuit is supplied with a traditional BUCK decompression converting circuit, finally drives suitable LED lamp string.So not only guarantee the integrality of former light fixture, and do not needed professional electrician to get final product safety operation, convenient and time-saving.

Description of drawings

Fig. 1 is the LED tube circuit figure of the compatible prior lamp holder of this prior art;

Fig. 2 is the LED tube circuit of the compatible prior lamp holder of the utility model.

The main element symbol description is following:

1, live wire input 2, be zero line input 3, switch 4, electric ballast

5, have four and introduce electrode LED fluorescent tube 6, starter 7, rectifier bridge heap

8, piezo-resistance M1 9, fuse F1 10, DC-DC transducer

21, live wire input 22, zero line input 23, switch 24, electric ballast

25, have 4 and introduce electrode LED fluorescent tube 26, starter 27, first rectifier bridge heap

28, second rectifier bridge heap, 29, first piezo-resistance 30, second piezo-resistance

31, fill out paddy circuit unit 32, DC-DC transducer and LED lamp string location

33, first fuse 34, second fuse 35, the 3rd fuse

Embodiment

In order more clearly to explain the utility model, the utility model is done to describe further below in conjunction with accompanying drawing.

See also Fig. 2; The LED tube circuit of the compatible prior lamp holder that the utility model provides; Comprise live wire input 21, zero line input 22, electric ballast 24, have 4 and introduce electrode LED fluorescent tubes 25, starter 26, first rectifier bridges heap, 27, second rectifier bridges heap 28, first piezo-resistance 29, second piezo-resistance 30, fill out paddy circuit unit 31 and DC-DC transducer and LED lamp string location 32; Live wire input 21 is connected to the first electrode PIN5 of LED fluorescent tube 25 through electric ballast 24; Zero line input 22 connects the third electrode PIN7 of LED fluorescent tube 25; Be connected starter 26 between LED fluorescent tube 25 second electrode PIN6 and the 4th electrode PIN8; First piezo-resistance 29 is connected between the third electrode PIN7 and the 4th electrode PIN8 of LED fluorescent tube 25, and second piezo-resistance 30 is connected in PIN6 between the first electrode PIN5 and second electrode of LED fluorescent tube 25; First rectifier bridge heap 27 comprises the first diode D5, the second diode D6, the 3rd diode D7 and the 4th diode D8; Second rectifier bridge heap 28 comprises the 5th diode D9, the 6th diode D10, the 7th diode D11 and the 8th diode D12; The positive pole of the negative pole of the first diode D5 and the second diode D6 is connected the back and is connected with the third electrode PIN7 of LED fluorescent tube 25; The positive pole of the negative pole of the 3rd diode D7 and the 4th diode D8 is connected the back and is connected with the 4th electrode PIN8 of LED fluorescent tube 25; The positive pole of the negative pole of the 5th diode D9 and the 6th diode D10 is connected the back and is connected with the first electrode PIN5 of LED fluorescent tube 25, and the positive pole of the negative pole of the 7th diode D11 and the 8th diode D12 is connected the back and is connected PIN6 with second electrode of LED fluorescent tube 25; Fill out paddy circuit unit 31 and comprise that first capacitor C 1, second holds C2, the 9th diode D13, the tenth diode D14, the 11 diode D15; The said paddy circuit unit 31 of filling out has positive pole and negative pole; The tie point that the positive pole of first capacitor C 1 is connected with the negative pole of the 11 diode D15 is a positive pole of filling out paddy circuit unit 31 power supplys; The tie point that the positive pole of the 9th diode D13 is connected with the negative pole of second capacitor C 2 is a negative pole of filling out paddy circuit unit 31; The negative pole of first capacitor C 1 also is connected with the positive pole of the tenth diode D14 with the tie point of the 9th diode D13, and the positive pole of the 11 D15 diode also is connected with the negative pole of the tenth diode D14 with the tie point of the positive pole of second capacitor C 2; The tie point that the positive pole of the positive pole of the first diode D5 and the 3rd diode D7 is connected is connected to the negative pole of filling out paddy circuit unit 31; After being connected, the positive pole of the positive pole of the 5th diode D9 and the 7th diode D11 is connected to the negative pole of filling out paddy circuit unit 31; Be connected to the positive pole of filling out paddy circuit unit 31 after the negative pole of the negative pole of the second diode D6 and the 4th diode D8 is connected, the tie point that the negative pole of the negative pole of the 6th diode D10 and the 8th diode D12 is connected is connected to the positive pole of filling out paddy circuit unit 31; The positive pole of filling out paddy circuit unit 31 is connected with the positive pole of DC-DC transducer and LED lamp string location 32, and the negative pole of filling out paddy circuit unit 31 is connected with the negative pole of DC-DC transducer and LED lamp string location 32.

The LED tube circuit of above-mentioned compatible prior lamp holder also comprises a switch 23 that is used for the said LED fluorescent tube of opening and closing, and switch 23 is connected between live wire input 21 and the electric ballast 24.

The LED tube circuit of above-mentioned compatible prior lamp holder is first fuse 33, second fuse 34 and the 3rd fuse 35 also; The anodal tie point of the 5th diode D9 negative pole and the 6th diode D10 is connected the first electrode PIN5 of LED fluorescent tube through the 3rd fuse 35; The anodal tie point of the first diode D5 negative pole and the second diode D6 is connected the third electrode PIN7 of LED fluorescent tube through first fuse 33, and the 3rd diode D7 negative pole and the tie point of the 4th diode D8 positive pole are connected the 4th electrode PIN8 of LED fluorescent tube through second fuse 34.

Situation compared to prior art; The LED tube circuit of the compatible prior lamp holder that the utility model provides; The circuit that adopts eight supper-fast diodes to form is appreciated that four inputs of these two rectifier bridges are connected on respectively on four stitch of fluorescent tube in order to have formed two rectifier bridges; The output parallel connection forms the dc terminal of rectification output; And the compound mode that has adopted three fuses and two piezo-resistances promptly can compatible existing traditional tube light fixture, needn't dismantle ballast and starter, and have short circuit and over-voltage protecting function.Accumulator after the rectification adopts two storage capacitors and three serial connection charges that supper-fast diode is formed, and the parallel discharge circuit is supplied with a traditional BUCK decompression converting circuit, finally drives suitable LED lamp string.So not only guarantee the integrality of former light fixture, and do not needed professional electrician to get final product safety operation, convenient and time-saving.

Please continue to consult Fig. 2, the utility model circuit has 8 supper-fast rectifier diode D5, D6, D7, D8, D9, D10, D11, D12,3 fuse F2, F3, F4,2 piezo-resistance M1, M2.With Fig. 2 as the embodiment circuit, fluorescent tube stitch PIN5, PIN6, PIN7; PIN8 closes a switch 23 according to connecting like Fig. 2, establishes electric current and flows into through switch 23 from input live wire 21, through ballast 24; Flow into fluorescent tube PIN5, electric current gets into rectifier diode D10 through fuse F4, be output as+; Through flow out after the internal conversion utilization DC-DC BUCK circuit 10-, get into rectifier diode D5, get into fuse F2; Flow to fluorescent tube PIN7, get back to the PIN8 that zero line input 22. connects with starter 26 two ends at this moment, PIN6 is in the negative pole two ends of rectifier diode D7 and D11 respectively; These two ends do not constitute current circuit and equipotential, so starter 26 can not worked, can not influence the work of LED fluorescent tube built-in power yet.Suppose transposing PIN5, the coupled position of PIN6, according to above-mentioned current direction, the rectifier diode that then uses is D12, D5.The PIN8 that connect with starter 26 two ends this moment, PIN6 is in the negative pole two ends of rectifier diode D7 and D9 respectively, and these two ends do not constitute current circuit and equipotential, so starter 26 can not worked, can not influence the work of LED fluorescent tube built-in power yet.And the like can obtain the situation of combination in any, the starter two ends all are in the equipotential state, starter also can operate as normal so this circuit can be dismantled.

In addition, the utility model is directed against the application of electronic transformer, through D5, and D6, D7; D8, D9, D10, D11, the electric current of D12 rectification output at first passes through+flows into C1; D14, C2 ,-, charge, at this moment C1; C2 is connected to series connection through D14, because series capacitance has the dividing potential drop effect, so C1 as long as C2 chooses the electrochemical capacitor of common 400V-450V, needn't select expensive 1000V electric capacity; Can reduce volume like this and reduce cost, discharge process is that C1 passes through D13, and C2 discharges through D15 simultaneously, is equivalent to parallel connection; Can guarantee that the voltage that flows to DC-DC BUCK circuit has only the half the of input voltage, so just significantly reduce the voltage stress of device for power switching in the DC-DC BUCK circuit, can select the switch power device of common specification to get final product trouble free service, can significantly reduce purchase cost like this.

The utility model is in order to reach replacement and compatible conventional fluorescent powder tube circuit fully; Use eight supper-fast rectifier diodes and replace four original rectifier diodes; This circuit has four inputs; Just cooperate four of fluorescent tube input stitch, be increased to three fuses and two piezo-resistances simultaneously, can be protected fully to reach when the input combination arbitrarily internal circuit.With reference to accompanying drawing 2, these eight supper-fast diode combinations are two rectification units, and input connects four stitch of fluorescent tube respectively, and the parallel connection of two rectification output ends is introduced one and filled out the paddy circuit by what two electric capacity and three supper-fast diodes were formed.So no matter input current flows into rectifier bridge from which stitch, can guarantee starter two ends equipotential, equals starter and does not cut any ice fully, is equivalent to an open circuit element.Can not influence the operate as normal of circuit.

Likewise, when cooperating the light fixture of electric ballast, identical function is arranged still, whichever stitch inflow current all can make the DC-DC transducer obtain identical operating voltage when can guarantee to use electric ballast.Because electric ballast is lighted the moment of conventional fluorescent powder fluorescent tube at build-up of luminance; For reaching the effect of similar Inductive ballast and starter dispenser brightness; Can export the pulse voltage of an about 700V of representative value moment; Puncture lamp tube ends and excite mercury vapour to produce luminescence-utraviolet with moment, so traditional DC-DC transducer is because the restriction of topological structure (for example instead swashing framework) then causes the main switching device punch through damage easily.Adopt C1 shown in Figure 2, C2, D13, D14; D15 forms fills out the paddy circuit, can bear the input voltage above 800V, and output voltage is merely the half the of 800V; Effectively the protection primary power switch device can be selected common withstand voltage device simultaneously, can practice thrift cost.This C1 simultaneously, C2, D13, D14, D15 forms fills out the phase place that the paddy circuit can improve input voltage and input current, can promote the power factor of this power supply like this, reaches and reduces mains by harmonics interference and purpose of energy saving.

More than the disclosed several specific embodiments that are merely the utility model, but the utility model is not limited thereto, any those skilled in the art can think variation all should fall into the protection range of the utility model.

Claims

1. the LED tube circuit of a compatible prior lamp holder; It is characterized in that; Comprise live wire input, zero line input, electric ballast, starter, have 4 and introduce electrode LED fluorescent tubes, first rectifier bridge heap, second rectifier bridge heap, first piezo-resistance, second piezo-resistance, fill out paddy circuit unit and DC-DC transducer and LED lamp string location; The live wire input is connected to first electrode of LED fluorescent tube through electric ballast; The zero line input connects the third electrode of LED fluorescent tube; Be connected starter between second electrode and the 4th electrode, first piezo-resistance is connected between the third electrode and the 4th electrode of LED fluorescent tube, and second piezo-resistance is connected between first electrode and second electrode of LED fluorescent tube; First rectifier bridge heap comprises first diode, second diode, the 3rd diode and the 4th diode; Second rectifier bridge heap comprises the 5th diode, the 6th diode, the 7th diode and the 8th diode; The positive pole of the negative pole of first diode and second diode is connected the back and is connected with the third electrode of LED fluorescent tube; The positive pole of the negative pole of the 3rd diode and the 4th diode is connected the back and is connected with the 4th electrode of LED fluorescent tube; The positive pole of the negative pole of the 5th diode and the 6th diode is connected the back and is connected with first electrode of LED fluorescent tube, and the positive pole of the negative pole of the 7th diode and the 8th diode is connected the back and is connected with second electrode of LED fluorescent tube; Fill out the paddy circuit unit and comprise first electric capacity, second electric capacity, the 9th diode, the tenth diode, the 11 diode; The said paddy circuit unit of filling out has positive pole and negative pole; The tie point that the positive pole of first electric capacity is connected with the negative pole of the 11 diode is a positive pole of filling out the paddy circuit power; The tie point that the positive pole of the 9th diode is connected with the negative pole of second electric capacity is a negative pole of filling out the paddy circuit unit; The negative pole of first electric capacity also is connected with the positive pole of the tenth diode with the tie point of the 9th diode, and the positive pole of the 11 diode also is connected with the negative pole of the tenth diode with the tie point of the positive pole of second electric capacity; The tie point that the positive pole of the positive pole of first diode and the 3rd diode is connected is connected to the negative pole of filling out the paddy circuit; After being connected, the positive pole of the positive pole of the 5th diode and the 7th diode is connected to the negative pole of filling out the paddy circuit; Be connected to the positive pole of filling out the paddy circuit after the negative pole of the negative pole of second diode and the 4th diode is connected, the tie point that the negative pole of the negative pole of the 6th diode and the 8th diode is connected is connected to the positive pole of filling out the paddy circuit; The positive pole of filling out the paddy circuit unit is connected with the positive pole of DC-DC transducer and LED lamp string location, and the negative pole of filling out the paddy circuit unit is connected with the negative pole of DC-DC transducer and LED lamp string location.

2. the LED tube circuit of compatible prior lamp holder according to claim 1; It is characterized in that; The LED tube circuit of said compatible prior lamp holder also comprises a switch that is used for the said LED fluorescent tube of opening and closing, and said switch is connected between live wire input and the electric ballast.

3. the LED tube circuit of compatible prior lamp holder according to claim 1 and 2; It is characterized in that; The LED tube circuit of said compatible prior lamp holder is first fuse, second fuse and the 3rd fuse also; The anodal tie point of the 5th diode D9 negative pole and the 6th diode D10 is connected the first electrode PIN5 of LED fluorescent tube through the 3rd fuse (35); The tie point of first diode cathode and second diode cathode is connected the third electrode of LED fluorescent tube through first fuse, and the 3rd diode cathode and the tie point of the 4th diode cathode are connected the 4th electrode of LED fluorescent tube through second fuse.