CN105864732A

CN105864732A - Light-emitting diode lamp tube

Info

Publication number: CN105864732A
Application number: CN201510831363.4A
Authority: CN
Inventors: 黄闿运
Original assignee: Cooler Master Co Ltd
Current assignee: Cooler Master Co Ltd
Priority date: 2015-02-10
Filing date: 2015-11-25
Publication date: 2016-08-17
Also published as: CN105873315A

Abstract

The invention discloses a light-emitting diode lamp tube. The light-emitting diode lamp tube is provided with a first side end part. The first side end part is provided with a first pin and a second pin. The light-emitting diode lamp tube emits light according to a low-frequency external power source which is applied to the first side end part. The light-emitting diode lamp tube comprises a driving circuit, a light emitting module and a working mode switching circuit. The driving circuit is electrically connected with the first pin and the second pin. The light emitting module is at least provided with light-emitting diodes and electrically connected with the driving circuit. The working mode switching circuit is electrically connected with the driving circuit and the light emitting module. The working mode switching circuit is closed according to the low-frequency external power source and the driving circuit, so that a power supply loop is formed, and accordingly drive currents drive the light emitting module to emit light along the power supply loop. In this way, under the condition that circuits around are not changed, the lamp tube can be applied to power supply systems of various existing fluorescent lamp holders.

Description

Light-emitting diode lamp tube

Technical field

The present invention relates to a kind of light emitting diode, and particularly a kind of light-emitting diode lamp tube.

Background technology

The fluorescent tube of both-end energising can run into regulation security restriction during installation.Traditional tube is typically both-end Energising, the most just introduce the concept of single-ended electrified.In the case of original light fixture is not yet eliminated, Need to use corresponding both-end energising fluorescent tube or single-ended electrified fluorescent tube according to the design of light fixture.Lamp is installed Time, in the requirement of installation procedure, when only one end connects lamp socket (energising), the other end not yet connects The end points connecing lamp socket can not have the problem of electric leakage, to prevent from installing or personnel's electric shock of dismounting light fixture. This regulation should be applicable to the fluorescent tube of single-ended electrified, but for the fluorescent tube of both-end energising, existing skill Art can be potentially encountered the difficulty in actual enforcement.Because the lamp tube ends of both-end energising is typically conducting So that wherein during the first end energising, the second end also should be energized.Therefore, traditional way is The lamp socket of the fluorescent tube turned on by both-end is reequiped, electric leakage during to avoid installing.So it is likely to result in lamp The equipment cost that tool is changed increases with human cost, will also result in the inconvenience of mounted lamp.

For fluorescent tube, the fluorescent tube Method for Installation restrictions system of some country existing, require that needs are the most single-ended During energising, other end no power.And when normally using (both-end all turn-on powers) both-end to be realized Conducting.This causes the biggest challenge for the designer of fluorescent tube.Even if by power-off, still it is difficult to protect Demonstrate,prove current power line and there is no electricity, it is also possible to cause potential safety problem.

Summary of the invention

The embodiment of the present invention provides a kind of light-emitting diode lamp tube, is applicable to existing both-end or single-ended The power-supply system of the lamp socket of switched-on light emitting diodes fluorescent tube, alternative traditional fluorescent tube, to avoid installing The problem may leaked electricity in Shi Qizhong one end, and need not change periphery (periphery) circuit of fluorescent tube.

The embodiment of the present invention provides a kind of light-emitting diode lamp tube, has the first side end, and described first Side end has the first pin and the second pin, and this light-emitting diode lamp tube is according to putting on the first side One lower frequency external power supply of end and luminous.This light-emitting diode lamp tube includes drive circuit, luminous mould Block and mode of operation switching circuit.Drive circuit is electrically connected with the first pin and the second pin.Luminous Module at least has a light emitting diode and is electrically connected with drive circuit.Mode of operation switching circuit is electrical Connect drive circuit and light emitting module.Mode of operation switching circuit is according to lower frequency external power supply and driving electricity Road conducting forms current supply circuit, so that driving electric current luminous along this current supply circuit driven for emitting lights module.

In one embodiment of this invention, this light emitting module has one first end and one second end, and this drives Streaming current flows into from this first end and flows out from this second end, and this mode of operation switching circuit includes:

One switch element, has one first switch terminals and a second switch end, is electrically connected with this This second end of optical module and this second pin；And

One switch unit, is electrically connected with this first side end and this switch element, and at this lower frequency external Power supply turns on this switch element when being applied in this first side end.

In one embodiment of this invention, this mode of operation switching circuit also includes:

One first diode, its anode tap is electrically connected with this second switch end；And

One second diode, its anode tap is electrically connected with the cathode terminal of this first diode, and the two or two The cathode terminal of pole pipe is electrically connected with this switch unit.

In one embodiment of this invention, this switch unit has a control end, and this control end electrically connects Connecing this switch element, this switch element decides whether conducting, this switching list according to the voltage of this control end Unit includes:

One first electric capacity and one first resistance, the two is connected in parallel to each other, this first electric capacity and this first resistance The two-end-point being connected to each other is electrically connected with this control end and is electrically connected with the moon of this second diode Extremely；And

One second electric capacity and one second resistance, the two is connected in parallel to each other, this second electric capacity and this second resistance The two-end-point being connected to each other is electrically connected with this control end and is electrically connected with the sun of this first diode Extremely.

In one embodiment of this invention, light-emitting diode lamp tube also includes a filtering and rectification circuit, This filtering and rectification circuit are electrically connected with this first side end and this drive circuit.

In one embodiment of this invention, this filtering and rectification circuit include:

One full-bridge converting unit, has one first power end, a second source end, one first outfan With one second outfan, this first power end is electrically connected with this first pin, and this second source end is electrical Connect this second pin, this first outfan of this full-bridge converting unit and this second outfan electricity respectively Property connects this drive circuit, and this second outfan is electrically connected with this mode of operation switching circuit.

In one embodiment of this invention, this filtering and rectification circuit also include:

One Electromagnetic interference filter, this first power end in this full-bridge converting unit is done by this electromagnetism Disturbing wave filter and be electrically connected with this first pin, this second source end in this full-bridge converting unit is by being somebody's turn to do Electromagnetic interference filter is electrically connected with this second pin.

In one embodiment of this invention, this drive circuit is a voltage potential quasi converting circuit.

The embodiment of the present invention additionally provides another kind of light-emitting diode lamp tube, its have the first side end and Second side end.First side end has the first pin and the second pin.Second side end has the 3rd Pin and the 4th pin.This light-emitting diode lamp tube is according to the external power source putting on the first side end And it is luminous.Light-emitting diode lamp tube include drive circuit, light emitting module, mode of operation switching circuit with And safety switch circuit.Drive circuit is electrically connected with the first pin and the second pin.Light emitting module is at least There is a light emitting diode and be electrically connected with drive circuit.Mode of operation switching circuit is electrically connected with and drives Circuit and light emitting module.Safety switch circuit is electrically connected with the second side end and light emitting module.Safety open Pass circuit portion's power supply outside is applied in the first side end and the second side end and external power source is a high frequency Being enabled during power supply, wherein whether mode of operation switching circuit is enabled decision according to safety switch circuit The path of current supply circuit.

One first switch element, has one first switch terminals and a second switch end, is electrically connected with This second end of this light emitting module and this second pin；And

One switch unit, is electrically connected with this first side end and this first switch element, and outside this Power supply turns on this first switch element when being at least applied in this first side end.

In one embodiment of this invention, this switch unit has a control end, and this control end electrically connects Connecing this first switch element, this first switch element decides whether conducting according to the voltage of this control end, This switch unit includes:

One first full-bridge converting unit, has one first power end, a second source end, one first defeated Going out end and one second outfan, this first power end is electrically connected with this first pin, this second source end It is electrically connected with this second pin, this first outfan of this first full-bridge converting unit and this second output End is electrically connected with this drive circuit, and this second outfan is electrically connected with this mode of operation switching electricity Road.

One Electromagnetic interference filter, this first power end in this first full-bridge converting unit is by this electricity Magnetic disturbance wave filter is electrically connected with this first pin, this second source in this first full-bridge converting unit End is electrically connected with this second pin by this Electromagnetic interference filter.

In one embodiment of this invention, this safety switch circuit has an input/output terminal, this luminescence Diode lamp tube also includes one the 3rd diode, the anode tap of the 3rd diode be electrically connected with this input/ Outfan, the cathode terminal of the 3rd diode is electrically connected with this first end of this light emitting module.

In one embodiment of this invention, this safety switch circuit has an input/output terminal, this input / outfan is positioned on this current supply circuit switched on, and this safety switch circuit includes:

One second switch unit, has one first switch terminals, a second switch end and one and triggers end；

One second full-bridge converting unit, has one first power end, a second source end, one first defeated Going out end and one second outfan, wherein this first outfan and this second outfan are electrically connected with this This second switch end of second switch unit and this first switch terminals, this first power end is electrically connected to This input/output terminal；

One triggers circuit, is electrically connected to this second sidepiece and this second switch unit, and this triggering electricity Road exports a trigger voltage to this triggering end of this second switch unit so that this second switch unit depends on Conducting is decided whether according to the magnitude of voltage of this trigger voltage；And

One start-up capacitance, has one first capacitance terminal and one second capacitance terminal, this first capacitance terminal and should Second capacitance terminal is respectively and electrically connected to this first power end and this triggering of this second full-bridge converting unit Circuit,

Wherein this triggering circuit determines the magnitude of voltage of this trigger voltage according to the magnitude of voltage of this start-up capacitance.

In one embodiment of this invention, this second switch unit at least includes a thyristor, should Thyristor has an anode tap, a cathode terminal and a gate terminal, the anode tap of this thyristor, Cathode terminal and gate terminal are electrically connected with this first switch terminals, second switch of this second switch unit End and this triggering end, this triggering circuit includes:

One transformator, has one first primary side, one second primary side, one first secondary end and 1 Secondary stage end, wherein this first primary side is electrically connected with this second capacitance terminal of this start-up capacitance, and this is years old Two primary sides are electrically connected with this second side end, and this first secondary end is electrically connected with this second switch unit This second switch end；

One the 4th diode, this second time that its anode tap is electrically connected with this transformator is extreme；And

One triggers maintenance unit, has a first input end and one second input, is electrically connected with The cathode terminal of the 4th diode and the first secondary end of this transformator, this triggering maintenance unit also has Having an outfan, this outfan of this triggering maintenance unit is electrically connected to being somebody's turn to do of this second switch unit Trigger end, to export this trigger voltage.

In one embodiment of this invention, this triggering maintenance unit at least includes:

One the 3rd electric capacity, has one first capacitance terminal and one second capacitance terminal, is respectively and electrically connected to this This triggering end of second switch unit and this first switch terminals；

One the 5th diode, has a cathode terminal and an anode tap, and wherein this cathode terminal is electrically connected to This triggering end of this second switch unit；

One the 3rd resistance, has one first resistance terminal and one second resistance terminal, be electrically connected with this One input and this anode tap of the 5th diode；And

One the 4th electric capacity, has one first capacitance terminal and one second capacitance terminal, is respectively and electrically connected to this Second input and this first resistance terminal of the 3rd resistance.

In one embodiment of this invention, this safety switch circuit also includes a voltage suppression diode, It has one first end and one second end, is electrically connected with this triggering maintenance unit and this second switch This first switch terminals of unit, this triggering maintenance unit includes:

Zener diode, has a cathode terminal and an anode tap, and wherein this anode tap is electrically connected to This second input, this cathode terminal is electrically connected to this first input end and this outfan；And

One the 4th resistance and one the 5th electric capacity, the two is connected in parallel to each other, the 4th resistance and the 5th electric capacity The two-end-point connected is respectively and electrically connected to this cathode terminal and this anode tap of this Zener diode.

In sum, the embodiment of the present invention provides a kind of light-emitting diode lamp tube, and its mode of operation switches Circuit forms a current supply circuit according to external power source with drive circuit conducting.Further, safety switch is utilized The characteristic that circuit only enables when altofrequency so that in light-emitting diode lamp tube installation process, not yet Any one end of energising is all without electric leakage.Need not change the situation of periphery (periphery) circuit of fluorescent tube Under, can directly substitute traditional fluorescent tube.

For being further understood that inventive feature and technology contents, refer to below in connection with the present invention's Describe in detail and accompanying drawing, but these explanations only are used for illustrating the present invention with institute's accompanying drawings, rather than to this The interest field of invention makees any restriction.

Accompanying drawing explanation

Fig. 1 is the LED driving circuit of the light-emitting diode lamp tube that the embodiment of the present invention provides Circuit block diagram；

Fig. 2 is that the light emitting diode of the light-emitting diode lamp tube that another embodiment of the present invention provides drives electricity The circuit block diagram on road；

Fig. 3 A is the first current supply circuit of the LED driving circuit that the embodiment of the present invention provides Schematic diagram；

Fig. 3 B is the second current supply circuit of the LED driving circuit that the embodiment of the present invention provides Schematic diagram；

Fig. 3 C is the second current supply circuit of the LED driving circuit that the embodiment of the present invention provides Schematic diagram；

Fig. 4 is the thin portion circuit diagram of the LED driving circuit that the embodiment of the present invention provides；

Fig. 5 is LED driving circuit and the thin portion of its switch unit of present example offer Circuit diagram；

Fig. 6 is the circuit framework of the safety switch unit of the light-emitting diode lamp tube that present example provides Figure；

Fig. 7 is the thin portion circuit of the safety switch unit of the light-emitting diode lamp tube that present example provides Figure；

Fig. 8 is that the operation of the safety switch unit of the light-emitting diode lamp tube that the embodiment of the present invention provides is shown It is intended to；

Fig. 9 is the thin of the safety switch unit of the light-emitting diode lamp tube that another embodiment of the present invention provides Portion's circuit diagram；

Figure 10 is the LED driving circuit of the light-emitting diode lamp tube that the embodiment of the present invention provides The schematic diagram of Application Example；

Figure 11 is that the light-emitting diode lamp tube that the embodiment of the present invention provides is connected to have electronic ballasting The schematic diagram of the Application Example of the lamp socket of device；

Figure 12 is that the light-emitting diode lamp tube that another embodiment of the present invention provides is connected to have inductance type The schematic diagram of the Application Example of the lamp socket of ballast；

Figure 13 is that the light-emitting diode lamp tube that another embodiment of the present invention provides is connected to ballast-free The schematic diagram of the Application Example of lamp socket.

Description of reference numerals: 1-LED driving circuit；11-filtering and rectification unit；12-drives Circuit；13-the first switch element；14-light emitting module；15-safety switch circuit；16-the 3rd diode； 17-the first diode；18-the second diode；19-switch unit；40-mode of operation cuts road；a1- First pin；A2-the second pin；B1-the 3rd pin；B2-the 4th pin；S1-the first current supply circuit； S2A, S2B-second current supply circuit；Cx-electric capacity；La-inductance；Ca-electric capacity；D-the first power end； E-second source end；F-the second outfan；G-the first outfan；D1, D2, D3, D4-diode； C1-the first electric capacity；C2-the second electric capacity；R1-the first resistance；R2-the second resistance；112-electromagnetic interference Wave filter；151-second switch unit；152-the second full-bridge converting unit；153-triggers circuit；154- Start-up capacitance；151a-the first switch terminals；151b-second switch end；151c-triggers end；152a-first Power end；152b-second source end；152c-the first outfan；152d-the second outfan；1531- 4th diode；1532-transformator；1533-triggers maintenance unit；1533a-first input end；1533b- Second input；1533c-outfan；P1-the first primary side；P2-the second primary side；S1 '-for the first time Level end；S2 '-second subprime end；Vx-external power source；154a-the first capacitance terminal；154b-the second electric capacity End；Br1-the first branch road；Br2-the second branch road；155-bypass diodes；155a-anode tap；155b- Cathode terminal；R3-the 3rd resistance；C3-the 3rd electric capacity；C4-the 4th electric capacity；D5-the 5th diode；Lp1- First path；Lp2-the second path；156-voltage suppression diode；156a-the first end；156b-second End；ZD-Zener diode；R4-the 4th resistance；C5-the 5th electric capacity；10-light-emitting diode lamp tube； 20-electronic ballast；30-inductance type ballast；31-short-circuit component.

Detailed description of the invention

(light-emitting diode lamp tube and the embodiment of LED driving circuit)

The light-emitting diode lamp tube of the present embodiment may replace traditional fluorescent tube, itself and traditional fluorescence Fluorescent tube is identical is all to connect lamp socket, and utilizes external power source and luminous.Those skilled in the art are readily understood by, Traditional light-emitting diode lamp tube has the first side end and the second side end, the first side end and second Side end is respectively provided with two pins.Light-emitting diode lamp tube in the present embodiment has the first side equally End and the second side end, the first side end has the first pin a1 and the second pin a2, the second side End has the 3rd pin b1 and the 4th pin b2.Light-emitting diode lamp tube in the present embodiment connects Application mode in the power supply of lamp socket will describe in detail in follow-up Figure 11 to Figure 13 embodiment.At this The LED driving circuit of light-emitting diode lamp tube is first described.

As it is shown in figure 1, Fig. 1 is the light-emitting diodes of the light-emitting diode lamp tube that the embodiment of the present invention provides The circuit block diagram of tube drive circuit.Light-emitting diode lamp tube 1 is according to putting on the one of the first side end Lower frequency external power supply and luminous.The LED driving circuit 1 of this light-emitting diode lamp tube includes filter Involve rectification unit 11, drive circuit 12, light emitting module 14 and mode of operation switching circuit 40. Filtering and rectification circuit 11 are electrically connected with the first side end and drive circuit 12, and apply feelings at some Under condition, filtering and rectification unit 11 can be removed.Drive circuit 12 is electrically connected with the first pin a1 With the second pin a2.Light emitting module 14 at least has light emitting diode and is electrically connected with drive circuit 12. Mode of operation switching circuit 40 is electrically connected with drive circuit 12 and light emitting module 14.Mode of operation switches Circuit 40 forms current supply circuit according to lower frequency external power supply with drive circuit 12 conducting, so that driving Electric current is luminous along this current supply circuit driven for emitting lights module.LED driving circuit 1 in Fig. 1 Mode of operation and described current supply circuit are similar to Fig. 2 embodiment, will illustrate in the lump in Fig. 2 embodiment. About described driving electric current, light emitting module 14 has the first end and the second end, and described driving electric current is from One end flows into and flows out from the second end.In the embodiment in figure 1, the first end of light emitting module 14 is such as For the anode of light emitting diode string, the moon of the second end of light emitting module 14 for example, light emitting diode string Pole.

As shown in Figures 1 and 2, Fig. 2 is the light-emitting diode lamp tube that another embodiment of the present invention provides The circuit block diagram of LED driving circuit.Comparison diagram 1 understands with Fig. 2, Fig. 1 embodiment It is that Fig. 2 adds safety switch circuit 15 with the difference of Fig. 2 embodiment.Safety switch circuit 15 It is positioned on current supply circuit switched on.After adding safety switch circuit 15, safety switch circuit 15 provide according to external power source be enabled during a high frequency electric source conducting condition.Fig. 3 A, figure 3B Yu Fig. 3 C represents that the first current supply circuit S1 and second of LED driving circuit 1 supplies respectively Electricity loop S2A, S2B.Mode of operation switching circuit 40 is electrically connected with filtering and rectification unit 11, drives Galvanic electricity road 12, light emitting module 14 and safety switch unit 15, and according to the frequency model of external power source Enclose and provide the first above-mentioned supply path S1 and the second supply path S2A or S2B one of them.

Mode of operation switching circuit 40 includes the first switch element the 13, the 3rd diode the 16, the 1st Pole pipe the 17, second diode 18 and switch unit 19.First switch element 13 has the first switch End and second switch end, be electrically connected with the second end and the second pin a2 of light emitting module 14. Switch unit 19 is electrically connected with the first side end (the first pin a1 and the second pin a2) and the first switch Unit 13, and the first switch element 13 is turned on when lower frequency external power supply is applied in the first side end. The anode tap of the first diode 17 is electrically connected with the second switch end of switch element 13.Second diode The anode tap of 18 is electrically connected with the cathode terminal of the first diode 17, the cathode terminal electricity of the second diode 18 Property connection switching unit 19.

Drive circuit 12 is electrically connected with filtering and rectification unit 11.First switch 13 electric connection filtering And rectification unit 11.First end of light emitting module 14 and the second end are electrically connected with filter by drive circuit Involve rectification unit 11 to form the first current supply circuit S1 (representing at Fig. 3 A), the first current supply circuit S1 For high frequency current supply circuit.Second end of light emitting module 14 and the first switch element 13 are electrically connected with filtering And rectification unit 11 is to form second current supply circuit S2A, S2B (representing respectively) at Fig. 3 B, Fig. 3 C, Second current supply circuit S2A, S2B is low frequency power supply loop.Drive circuit 12 can be that voltage level turns Change circuit, but the most therefore the present invention limits.

Safety switch circuit 15 be electrically connected with the second side end (the 3rd pin b1 and the 4th pin b2) and Light emitting module 14.Safety switch circuit 15 is applied in the first side end and the second side at external power source End and external power source are to be enabled during a high frequency electric source, and wherein mode of operation switching circuit 40 is according to peace Whether full switch circuit 15 is enabled and determines the path of current supply circuit.Such as: safety switch unit 15 only receive outside at the first pin a1, the second pin a2, the 3rd pin b1 and the 4th pin b2 For conducting shape when the frequency range of power supply and external power source is high-frequency range (such as 20kHz to 60kHz) State.

Safety switch circuit 15 has an input/output terminal.The anode tap of the 3rd diode 16 electrically connects Connect the input/output terminal of safety switch circuit 15.The cathode terminal of the 3rd diode 16 is electrically connected with luminescence First end of module 14, the anode tap of diode 16 is electrically connected with the 3rd by safety switch unit 15 Pin b1 and the 4th pin b2.The negative electrode of the first diode 17 is electrically connected with the anode of diode 16. The anode of the first diode 17 is electrically connected with filtering and rectification unit 11, the anode of the first diode 17 The second end of light emitting module 14, and the anode of the first diode 17 it is electrically connected with by drive circuit 12 The second end of light emitting module 14 it is electrically connected with by the first switch element 13.The sun of the second diode 18 Pole is electrically connected with the anode of the 3rd diode 16.Switch unit 19 is electrically connected with the second diode 18 Negative electrode and the first switch element 13, switch unit 19 receives external power source by the second diode 18 To control the first switch element 13.When the frequency of external power source is positioned at high-frequency range, switch unit 19 Turn on the first switch element 13, when the frequency of external power source is less than high-frequency range, switch unit 19 It is not turned on switch element 13.

About the first current loop S1, as shown in Figure 3A, drive circuit 12 provides unidirectional current so that sending out Optical module 14 is luminous.First current loop S1 is not when external power source is at high-frequency range (such as 60Hz) Produce current supply circuit.About the second current loop S2A and S2B, when the frequency of external power source is at high frequency During scope, then switch unit 19 turns on the first switch element 13 to bypass (bypass) drive circuit 12. Represent that frequency falls at the external power source (alternating current) of high-frequency range at the second current loop S2A of Fig. 3 B It is sent to right side the 3rd pin b1 and the 4th pin by the first pin a1 and the second pin a2 in left side The current path of the half period (referred to here as positive half cycle) of b2.The second current loop S2B at Fig. 3 C Represent that frequency falls the external power source (alternating current) at high-frequency range by right side the 3rd pin b1 and the 4th pin B2 is sent to the half period (referred to here as negative half period) of the first pin a1 and the second pin a2 in left side Current path.It addition, whether at positive half cycle or negative half period, high frequency electric all can be by the two or two Pole pipe 18 is to input switch unit 19.Second current loop S2A, S2B is to share the first switch The current path that unit 13 is provided, difference is only that principle based on rectification, the second current loop S2A flows through the first diode 17, and the second current loop S2B flows through the 3rd diode 16.In reality Border is applied to the fluorescent tube lighting situation of the lamp socket of various power supply aspect, will be in follow-up according to various lamp sockets electricity Road situation illustrates one by one.

As shown in Figure 4, Fig. 4 is the thin portion of the LED driving circuit that the embodiment of the present invention provides Circuit diagram.Fig. 4 essentially consists in and further describes filtering and a kind of demonstrative circuit of rectification unit 11 Details.Filtering and rectification unit 11 include the first full-bridge converting unit 111 and Electromagnetic interference filter 112。

First full-bridge converting unit 111 includes four diodes D1, D2, D3, D4.Diode The negative electrode of D1 is electrically connected with the first power end d of the first full-bridge converting unit 111, diode D1's Anode is electrically connected with the second Ausgang of the first full-bridge converting unit 111.The negative electrode electricity of diode D2 Property connect the first full-bridge converting unit 111 second source end e, diode D2 anode be electrically connected with Second Ausgang of the first full-bridge converting unit 111.It is complete that the anode of diode D3 is electrically connected with first First power end d of bridge converting unit 111, the negative electrode of diode D3 is electrically connected with the first full-bridge conversion First outfan g of unit 111.The anode of diode D4 is electrically connected with the first full-bridge converting unit The second source end e of 111, the negative electrode of diode D4 is electrically connected with the first full-bridge converting unit 111 First outfan g.Comparison Fig. 1 Yu Fig. 2 understands, the first outfan g of full-bridge converting unit 111 It is electrically connected with drive circuit 12 with the second Ausgang, and the second Ausgang the most electrically connects Connect mode of operation switching circuit 40.

Further, about Electromagnetic interference filter 112, the first electricity of the first full-bridge converting unit 111 Source d is electrically connected with the first pin a1, the first full-bridge converting unit by Electromagnetic interference filter 112 The second source end e of 111 is electrically connected with the second pin a2 by Electromagnetic interference filter 11.

In the present embodiment, Electromagnetic interference filter 112 is pi type filter, but the present invention is not Therefore limit.Pi type filter includes electric capacity Cx, inductance La and electric capacity Ca.Electric capacity Cx electrically connects It is connected between the first pin a1 and the second pin a2.Inductance La be electrically connected at the first pin a1 with Between first power end d of the first full-bridge converting unit 111.It is complete that electric capacity Ca is electrically connected at first Between the first power end d and second source end e of bridge converting unit 111.When external power source is via During one pin a1 and the second pin a2 input, impedance produced by inductance La, this π type filters Device can make power supply substantially be inputted the first full-bridge converting unit 111 by second source end e.

As it is shown in figure 5, Fig. 5 be present example provide LED driving circuit and its cut Change the thin portion circuit diagram of unit.Switch unit 19 has a control end, is electrically connected with switch element 13, Switch element 13 decides whether conducting according to the voltage controlling end.Switch unit 19 includes being connected in parallel to each other The first electric capacity C1 and the first resistance R1, the second electric capacity C2 being connected in parallel to each other and the second resistance R2 with Form high-pass filtering circuit.The control end of switch unit 19 be the first electric capacity C1, the second electric capacity C2, First resistance R1 and the end points of the second resistance R2 connecting valve unit 13.First electric capacity C1 and first The two-end-point that resistance R1 is connected to each other is electrically connected with control end and is electrically connected with the second diode The cathode terminal of 18.The two-end-point that second electric capacity C2 and the second resistance R2 is connected to each other the most electrically connects Connect and control end and be electrically connected with the anode tap of the first diode 17.To defeated by the 3rd diode 18 For the high frequency electric entered, the cut-off frequency f that the first electric capacity C1 and the first resistance R1 is formed_ZSize For:

f_{Z} = \frac{1}{2 π \cdot R_{1} \cdot C_{1}},

So, for high frequency electric, switch unit 19 has higher compared to light emitting module 14 Impedance, so that the electric current of the overwhelming majority is by light emitting module 14, does not the most affect light emitting module 14 Work.Then, input can turn on the first switch element 13 to the high frequency electric source of switch unit 19. Further, the second electric capacity C2 is in order to maintain the conducting voltage of the first switch element 13.Such as, at high frequency The negative half period (with reference to Fig. 3 C) that electric current is inputted by right side the 3rd pin b1 and the 4th pin b2, high-frequency electrical Stream makes switch unit 19 turn on the first switch element 13, and the capacitance of the second electric capacity C2 is optional relatively big, At least to maintain the voltage of a half cycle, thereby at high frequency electric by the first pin a1 and second in left side The positive half cycle (with reference to Fig. 3 B) of pin a2 input can maintain conducting the first switch 13.It addition, when outside When the frequency of power supply is not positioned at high-frequency range time (or referred to as low-frequency power), then turn off this first switch single Unit 13.Above-mentioned cut-off frequency f_ZMay be used to determine the interval of aforesaid high-frequency range, but the present invention is also The most therefore the interval of high-frequency range is limited.The first above-mentioned switch element 13 can be transistor switch, Such as metal-oxide half field effect transistor (MOSFET), but the most therefore the present invention limits.

As shown in Figure 6, Fig. 6 is the safety switch list of the light-emitting diode lamp tube that present example provides The circuit framework figure of unit.From the beginning of Fig. 6, external power source represents with Vx, in order to help explanation.Peace Full switch unit 15 is electrically connected with the first end of light emitting module 14 by the 3rd diode 16, and passes through Second diode 17 and the first switch element 13 are electrically connected with the second end of light emitting module 14.Safety open Close unit 15 to include second switch unit the 151, second full-bridge converting unit 152, trigger circuit 153 With start-up capacitance 154.

Second switch unit 151 has the first switch terminals 151a, second switch end 151b and triggering End 151c.Full-bridge converting unit 152 have the first power end 152a, second source end 152b, One outfan 152c and the second outfan 152d.First outfan 152c connects second switch unit The second switch end 151b of 151, the first of the second outfan 152d connection second switch unit 151 opens Close end 151a, the first power end 152a and be electrically connected with the input/output terminal of safety switch unit 15 (i.e. It is electrically connected with 16 anode taps of the 3rd diode).

Trigger circuit 153 and be electrically connected to the second sidepiece (the 3rd pin b1 and the 4th pin b2) and the Two switch elements 151, and trigger circuit 153 also export a trigger voltage to second switch unit 151 Triggering end 151c so that second switch unit 151 decides whether to lead according to the magnitude of voltage of trigger voltage Logical.Trigger circuit 153 at least include the 4th diode 1531, transformator 1532 and trigger maintenance Unit 1533.4th diode 1531 has anode tap and cathode terminal.Transformator 1532 is essentially HF current transformer.Transformator 1532 have the first primary side P1, the second primary side P2, first Secondary end S1 and second subprime end S2.First primary side P1 is electrically connected with second source end 152b, Second primary side P2 is electrically connected with the second side end, i.e. by the 3rd pin b1 and the 4th pin b2 Connect external power source.First secondary end S1 ' is electrically connected with the second switch end of second switch unit 151 151b.Second subprime end S2 is electrically connected with the anode tap of the 4th diode 1531.Trigger maintenance unit 1533 have first input end 1533a and the second input 1533b, are electrically connected with the four or two pole The cathode terminal of pipe 1531 and the first secondary end S1 of transformator 1532.Trigger maintenance unit 1533 Also there is an outfan 1533c, be electrically connected to the triggering end 151c of second switch unit 151, with Trigger output voltage.

Start-up capacitance 154 has the first capacitance terminal 154a and the second capacitance terminal 154b.Start-up capacitance 154 The first capacitance terminal 154a connect the first power end 152a of the second full-bridge converting unit 152.Start Second capacitance terminal 154b of electric capacity 154 is electrically connected with and triggers circuit 153, is illustrated in figure 6 connection and touches First primary side P1 of the transformator 1532 of Power Generation Road 153.In one embodiment, start-up capacitance 154 The capacitance having such as can be between 470 × 10-12 farad to 2.2 × 10-9 farad, but the present invention The most therefore limit.

When external power source Vx power supply light emitting module 14, triggering maintenance unit 1533 produces second and opens Close the triggering power supply needed for unit 151, after guaranteeing second switch unit 151 conducting, external power source Vx driven for emitting lights module 14 is shinny.In other words, in the loop of above-mentioned safety switch unit, first lead to After crossing high frequency current trigger second switch unit 151 conducting Guan Bi, further keep high frequency electric mutual The electric current of sensor, with realize safety switch unit 15 offer guarantee install hot line job safety merit Energy.

Thereby, it is applied to the operation of light-emitting diode lamp tube by safety switch unit 15, to guarantee to send out After four pins (a1, a2, b1, b2) of optical diode fluorescent tube are plugged to lamp socket completely, second switch Unit 151 just can turn on, and then external power source Vx driven for emitting lights module 14 is luminous, so, can prevent Only user is installing the situation that light-emitting diode lamp tube occurs to get an electric shock, to guarantee the person peace of user Entirely.Be applied to the operation of light-emitting diode lamp tube as safety switch unit 15, will follow-up further Explanation.

As it is shown in fig. 7, Fig. 7 is the safety switch list of the light-emitting diode lamp tube that present example provides The thin portion circuit diagram of unit.First capacitance terminal 154a of start-up capacitance 154 connects the second full-bridge converting unit The first power end 152a of 152, the second capacitance terminal 154b connects the of the second full-bridge converting unit 152 Two power end 152b and the first primary side P1 of transformator 1532, to form the first branch road Br1.? Road diode 155 has anode tap 155a and cathode terminal 155b.Anode tap 155a connects the second full-bridge Second outfan 152d of converting unit 152, cathode terminal 155b connect second unit switch 151 First switch terminals 151a, to form the second branch road Br2.

In the present embodiment, second switch unit 151 is at least one, and it has the first switch terminals 151a, second switch end 151b and triggering end 151c.Trigger maintenance unit 1533 and include at least one Resistance capacitance group, and described resistance capacitance group is connected in series by the 3rd resistance R3 and the 3rd electric capacity C3, To form the first connection end, the second connection end and to connect end altogether.Described first connects end connects the four or two The cathode terminal of pole pipe 1531, described second connects end connects the of at least one second switch unit 151 Two switch terminals 151b, the described end that connects altogether connects the triggering end 151c of at least one second switch unit 151. Specifically, as it is shown in fig. 7, the 3rd electric capacity C3 has the first capacitance terminal and the second capacitance terminal, point It is not electrically connected to triggering end 151c and first switch terminals 151a of second switch unit 151.5th Diode D5 has a cathode terminal and an anode tap, and wherein this cathode terminal is electrically connected to second switch The triggering end 151c of unit 151.3rd resistance R3 has the first resistance terminal and the second resistance terminal, point Electricity Xing Lianjie first input end 1533a and the anode tap of the 5th diode D5.4th electric capacity C4 tool There are the first capacitance terminal and the second capacitance terminal, are respectively and electrically connected to the second input 1533b and the 3rd electricity First resistance terminal of resistance R3.It is worth mentioning, the quantity of wherein said resistance capacitance group and switch element Quantity equal, for the present embodiment, the quantity of second switch unit 151 is three, so electric The quantity of resistance capacitance group also corresponds to three groups.

On reality is applied, generally for the pressure security consideration of insulation, therefore, multiple the can be used Two switch element 151 series architecture, as shown in Figure 7.Additionally, described second switch unit 151 to Including a thyristor (silicon controlled rectifier, SCR) less, it has an anode tap (anode, A), a cathode terminal (cathode, K) and a gate terminal (gate, G), be electrically connected with second First switch terminals 151a of switch element 151, second switch end 151b and triggering end 151c.

Then, as shown in Figure 8, Fig. 8 is the peace of the light-emitting diode lamp tube that the embodiment of the present invention provides The operation chart of full switch unit.For convenience of explanation, in the present embodiment with second switch unit 151 be one as a example by illustrate.Additionally, also assume that external power source Vx is an alternating current power supply.But It is that actual application is not with above-mentioned condition for limiting.

When external power source Vx is positive half period power supply light emitting module 14, external power source Vx is first to opening A charging voltage is set up in dynamic condenser 154 charging, and charging voltage is via the first branch road Br1 and transformator 1532 conducting the 4th diodes 1531, and set up vertical by triggering the resistance capacitance of maintenance unit 1533 One trigger voltage, by triggering end 151c to trigger second switch unit 151, and then conducting second is opened Close unit 151.The signal of above-mentioned action can be on Fig. 8 shown in first path Lp1.

Be worth mentioning, owing to the capacitance of start-up capacitance 154 is less, as it was previously stated, capacitance between 470 × 10-12 farad is to 2.2 × 10-9 farad, therefore, when frequency is the highest, and start-up capacitance 154 Impedance is the least, so, under high frequency operation, this start-up capacitance 154 is charged by external power source Vx The charging voltage set up, just via the first branch road Br1, turns on second switch unit 151.

Then, external power source Vx via the second full-bridge converting unit 152 and the second branch road Br2, makes again Obtain external power source Vx driven for emitting lights diode 14 shinny.The signal of above-mentioned action can be on Fig. 8 Shown in one second path Lp2.It is worth mentioning, before turning on due to second switch 151, external power source Vx cannot transmit power supply via the second branch road Br2, therefore, if being one with safety switch unit 15 Angle for, safety switch unit 15 be turn off (turned off) state.In other words, external electrical Source Vx to transmit the condition of power supply via safety switch unit 15, is safety switch unit 15 and is Conducting (enable) situation, that is, under positive half cycle operates, external power source Vx needs first via the first via Footpath Lp1 triggers and after turning on second switch unit 151, then outside providing via the second path Lp2 The transmission path of portion power supply Vx.

So, the technical characteristics of the present embodiment can be realized: " send out when external power source Vx powers During optical module 14, trigger maintenance unit 1533 and produce the triggering power supply needed for second switch unit 151, After guaranteeing second switch unit 151 conducting, external power source Vx driven for emitting lights module 14 is shinny.” So, it can be ensured that before user installation fluorescent tube completes to lamp socket, do not have external power source Vx and power The situation of conducting fluorescent tube occurs, and therefore can prevent user from getting an electric shock at installation light-emitting diode lamp tube Situation, to guarantee the personal safety of user.

Additionally, when external power source Vx is negative half period operation, although external power source Vx is via this transformation 4th diode 1531 is ended operation for inverse by voltage that device 1532 primary side is provided partially, but, The voltage provided owing to triggering the resistance capacitance of maintenance unit 1533 be enough to maintain second switch unit 151 turned in the period of negative half period, therefore, returned the operation of positive half cycle once external power source Vx, To persistently trigger and turn on second switch unit 151 by first path Lp1 again, and by second Path Lp2 provides the transmission path of power supply.

Then, as it is shown in figure 9, Fig. 9 is the light-emitting diode lamp tube that another embodiment of the present invention provides The thin portion circuit diagram of safety switch unit.In this embodiment, safety switch unit 15 is except including Outside aforementioned second switch unit the 151, second full-bridge converting unit 152 and triggering circuit 153, also Including voltage suppression diode 156.Wherein voltage suppression diode 156 can be transient voltage suppresser (transient voltage suppresser,TVS).Voltage suppression diode 156 has the first end 156a With the second end 156b, wherein the first end 156a is electrically connected with and triggers maintenance unit 1533 and second switch First switch terminals 151a of Unit 151, the second end 156b connects triggering maintenance unit 1533.

It addition, second switch unit 151 have the first switch terminals 151a, second switch end 151b with And trigger end 151c.Trigger maintenance unit 1533 and mainly include Zener diode ZD and resistance capacitance group. Zener diode ZD has a cathode terminal and an anode tap, and wherein this anode tap is electrically connected to trigger Second input 1533b of maintenance unit 1533, this cathode terminal is then electrically connected to trigger maintenance unit The first input end 1533a and outfan 1533c of 1533.Resistance capacitance group is by one the 4th resistance R4 It is connected in parallel to each other with one the 5th electric capacity C5, to form one first connection end and one second connection end, and the The two-end-point that four resistance R4 and the 5th electric capacity C5 connect is respectively and electrically connected to Zener diode ZD's Cathode terminal and anode tap, as shown in Figure 9.Described first connects end connects voltage suppression diode 156 The triggering end 151c of the second end 156b and second switch unit 151, described second connects end connects The second switch end 151b of second switch unit 151.

When external power source Vx power supply light emitting module 14, changed via the ballast in power-supply system The igniting high voltage produced triggers and turns on second switch unit 151 so that external power source Vx Driven for emitting lights module 14 is shinny.Voltage suppression diode 156 is in order to suppress triggering second switch unit The high-voltage value of 151, and then high-energy produced by the moment of reduction igniting soft breakdown.It is worth mentioning, On reality is applied, voltage suppression diode 156 can need not use, but, relatively just need Will be in view of when there is no voltage suppression diode 156 suppression igniting high voltage, second used opens Close the situation of soft breakdown electric current of unit 151, also or adjust the output characteristics of ballast, to meet not There is the applicable cases of installing voltage suppression diode 156.

As shown in Figure 10, Figure 10 is the luminescence two of the light-emitting diode lamp tube that the embodiment of the present invention provides The schematic diagram of the Application Example of pole tube drive circuit.The circuit of Figure 10 is actual in order to represent one of which Circuit performance.In Fig. 10 with the example representative graph of step-down controller (Buck converter) The drive circuit 12 of 1 (or Fig. 2).But the most therefore the present invention limits, drive circuit 12 can also be Type of voltage step-up/down converter (Buck-boost converter) or other kinds of transducer.According to above-mentioned act Example, those skilled in the art should be able to be readily understood by the embodiment of drive circuit 12, repeat no more.

Then, the application mode of the light-emitting diode lamp tube of the embodiment of the present invention is gone on to say.This enforcement Light-emitting diode lamp tube in example is applicable to the inductance type ballast of collocation low frequency (50Hz～60Hz) lighting Device (magnetic ballast) or the electronic ballast of high frequency (20kHz～60kHz) instantaneous lighting (electrical ballast), even the configuration of ballast-free (none ballast), is equally applicable.Can join Close Figure 11 to Figure 13 and the operating instruction of correspondence thereof.

Figure 11 is that the light-emitting diode lamp tube that the embodiment of the present invention provides is connected to have electronic ballasting The schematic diagram of the Application Example of the lamp socket of device.Light-emitting diode lamp tube 10 is connected to a lamp socket (does not schemes Show), described lamp socket includes the first pin of electronic ballast 20 and connecting luminous diode fluorescent tube A1, the second pin a2, the 3rd pin b1, the electric connection structure of the 4th pin b2.In other words, By light-emitting diode lamp tube 10 is installed on lamp socket, and powered by external power source Vx, with Form the power-supply system of overall light-emitting diode lamp tube.This power-supply system includes lamp socket and light-emitting diodes Spot pipe 10, lamp socket provides external power source Vx.The lighting situation of fluorescent tube is as described below.In this situation, External power source be high frequency electric source (external power source at high-frequency range (such as 20kHz to 60kHz), as Fig. 3 B, Shown in Fig. 3 C Yu Figure 11.As shown in Fig. 3 B Yu Figure 11, it is assumed that when positive half cycle operates, first draws Foot a1 (with the second pin a2) is electrically connected with external power source Vx by electronic ballast 20 and just obtains Voltage, external power source Vx conducting supply path (high frequency current supply circuit S2A) by the first pin a1 (with Second pin a2) enter filtering and rectification unit 11, light emitting module 14, then via the first of conducting (now safety switch unit 15 makes for switch element 13 and the first diode 17 to safety switch unit 15 Can turn on), the most again by safety switch unit 15 to the 3rd pin b1 (with the 4th pin b2).Negative During half cycle operation, as shown in Fig. 3 C Yu Figure 11, the 3rd pin b1 (with the 4th pin b2) passes through electronics Formula ballast 20 is electrically connected with external power source Vx and obtains positive voltage, and power source path is by the 3rd pin B1 (with the 4th pin b2) arrives safety switch unit 15, then to the 3rd diode 16, then arrives luminous mould Block 14, then arrive again through the first switch element 13 of conducting and filter and rectification unit 11, then to the One pin a1 (with the second pin a2).

Figure 12 is that the light-emitting diode lamp tube that another embodiment of the present invention provides is connected to have inductance type The schematic diagram of the Application Example of the lamp socket of ballast.Lamp socket includes inductance type ballast 30, inductance type Ballast 30 has input and outfan.When light-emitting diode lamp tube 10 groups is connected on lamp socket, send out First pin a1 of optical diode fluorescent tube 10 and the 3rd pin b1 is directly connected to by short-circuit component 31. Second pin a2 of light-emitting diode lamp tube 10 connects the outfan of inductance type ballast 30.External electrical Source Vx is connected to the second pin a2 of light-emitting diode lamp tube 10 and the input of inductance type ballast 30 End, and then light-emitting diode lamp tube 10 is powered.The lighting situation of fluorescent tube is as described below.In this situation, External power source be low-frequency power (external power source is not at high-frequency range (such as 60Hz), as Fig. 3 A with Shown in Figure 12.No matter power supply is the operation of positive half cycle or negative half period operation, filtering and rectification unit 11 It is all direct current by the AC rectification of external power source Vx, and provides direct current to supply electricity to drive circuit 12.In detail Thin says, it is assumed that when positive half cycle operates, external power source Vx provide positive voltage to the second pin a2, External power source Vx is by the second pin a2 input current to filtering and rectification unit 11 (filtering and rectification list Drive circuit 12 driven for emitting lights module 14 is made after unit's 11 rectifications), then filtering and rectification unit 11 are whole Miscarriage raw output electric current is by the first pin output a1, and then electric current is by the first pin a1 to the 3rd pin B1 (short-circuit component 31 short circuit), the most again by the 3rd pin b1 to the 4th pin b2 (the 3rd pin b1 With the 4th pin b2 for connecing altogether).Further, since external power source is low-frequency power so that safety switch Unit 15 is not turned on (not enabling).When negative half period operates, the current path of external power source Vx conducting It is the reverse path of supply path during the operation of positive half cycle, namely by the 4th pin b2 to the 3rd pin B1, then by the 3rd pin b1 to first pin a1, the most again by the first pin a1 to second pin A2 (by exporting after filtering and rectification unit 11 rectification), eventually passes back to external power source Vx.Same, Safety switch unit 15 is also not turned on.

Figure 13 is that the light-emitting diode lamp tube that another embodiment of the present invention provides is connected to ballast-free The schematic diagram of the Application Example of lamp socket.When light-emitting diode lamp tube 10 groups is connected on lamp socket, luminous two The 3rd pin b1 and the 4th pin b2 of pole spot pipe 10 is that sky meets (no connection, N.C.).Outward Portion power supply Vx is connected to the first pin a1 and second pin of light-emitting diode lamp tube 10, and then right Light-emitting diode lamp tube 10 is powered.In other words, with reference to Fig. 2, it is to utilize to drive when this situation Galvanic electricity road 12 controls the power supply of light emitting module 14.Under this electric power thus supplied, whether external power source is just Half cycle or negative half period, the external power source Vx of exchange is all converted into unidirectional current by filtering and rectification unit To drive circuit 12, light emitting module 14 is directly powered by drive circuit 12, and safety switch unit 15 are not turned on (not enabling).Now, it is low-frequency power due to external power source Vx so that safety switch Unit 15 is not turned on, therefore the 3rd pin b1 and the 4th pin b2 is considered as open circuit, does not has electric current to pass through.

(possible effect of embodiment)

In sum, the embodiment of the present invention provides light-emitting diode lamp tube and LED driving circuit. The fluorescent tube being applicable to electronic ballast directly can be replaced by the light-emitting diode lamp tube of the embodiment of the present invention Change, it is not necessary to change periphery circuit.The fluorescent tube being applicable to inductance type ballast can also be real by the present invention The light-emitting diode lamp tube executing example is directly replaced, and is not necessary to change circuit around and (is generally disposed at lamp socket On).When straight-through electric main (without external ballast), the light-emitting diodes of the embodiment of the present invention Spot pipe also can be used directly, and does not affect its mode of operation.Thereby, it can be ensured that fluorescent tube is installed and band Electrically operated safety.

The foregoing is only embodiments of the invention, it also is not used to limit to protection scope of the present invention.

Claims

1. a light-emitting diode lamp tube, has one first side end, and this first side end has one One pin and one second pin, and this light-emitting diode lamp tube is according to putting on the one of this first side end Lower frequency external power supply and luminous, it is characterised in that this light-emitting diode lamp tube includes:

One drive circuit, is electrically connected with this first pin and this second pin；

One light emitting module, at least has a light emitting diode, and is electrically connected with this drive circuit；And

One mode of operation switching circuit, is electrically connected with this drive circuit and this light emitting module, this Working mould Formula switching circuit forms a current supply circuit according to this lower frequency external power supply with the conducting of this drive circuit, thus A driving electric current is made to drive this light emitting module luminous along this current supply circuit.

Light-emitting diode lamp tube the most according to claim 1, it is characterised in that this light emitting module Having one first end and one second end, this driving electric current flows into from this first end and flows out from this second end, This mode of operation switching circuit includes:

Light-emitting diode lamp tube the most according to claim 2, it is characterised in that this mode of operation Switching circuit also includes:

Light-emitting diode lamp tube the most according to claim 3, it is characterised in that this switch unit Having a control end, this control end is electrically connected with this switch element, and this switch element is according to this control end Voltage decide whether conducting, this switch unit includes:

Light-emitting diode lamp tube the most according to claim 1, it is characterised in that also include a filter Involving rectification circuit, this filtering and rectification circuit are electrically connected with this first side end and this drive circuit.

Light-emitting diode lamp tube the most according to claim 5, it is characterised in that this filtering and whole Current circuit includes:

Light-emitting diode lamp tube the most according to claim 6, it is characterised in that this filtering and whole Current circuit also includes:

Light-emitting diode lamp tube the most according to claim 1, it is characterised in that this drive circuit It it is a voltage potential quasi converting circuit.

9. a light-emitting diode lamp tube, has one first side end and one second side end, and this is first years old Side end has one first pin and one second pin, and this second side end has one the 3rd pin and 4th pin, and this light-emitting diode lamp tube according to put on this first side end an external power source and Luminous, it is characterised in that this light-emitting diode lamp tube includes:

One light emitting module, at least has a light emitting diode, and is electrically connected with this drive circuit；

One mode of operation switching circuit, is electrically connected with this drive circuit and this light emitting module；And

One safety switch circuit, is electrically connected with this second side end and this light emitting module, this safety switch Circuit is applied in this first side end and this second side end and at this external power source at this external power source It is to be enabled during a high frequency electric source,

Wherein whether this mode of operation switching circuit is enabled according to this safety switch circuit and determines this power supply The path in loop.

Light-emitting diode lamp tube the most according to claim 9, it is characterised in that this luminescence mould Block has one first end and one second end, and this driving electric current flows into and from this second end stream from this first end Going out, this mode of operation switching circuit includes:

11. light-emitting diode lamp tubes according to claim 10, it is characterised in that this Working mould Formula switching circuit also includes:

12. light-emitting diode lamp tubes according to claim 11, it is characterised in that this switching list Unit has a control end, and this control end is electrically connected with this first switch element, and this first switch element depends on Deciding whether conducting according to the voltage of this control end, this switch unit includes:

13. light-emitting diode lamp tube according to claim 9, it is characterised in that also include Filtering and rectification circuit, this filtering and rectification circuit are electrically connected with this first side end and this drive circuit.

14. light-emitting diode lamp tubes according to claim 13, it is characterised in that this filtering and Rectification circuit includes:

15. light-emitting diode lamp tubes according to claim 14, it is characterised in that this filtering and Rectification circuit also includes:

16. light-emitting diode lamp tubes according to claim 9, it is characterised in that this driving electricity Lu Weiyi voltage potential quasi converting circuit.

17. light-emitting diode lamp tubes according to claim 9, it is characterised in that this safety open Closing circuit and have an input/output terminal, this light-emitting diode lamp tube also includes one the 3rd diode, and this is the years old The anode tap of three diodes is electrically connected with this input/output terminal, and the cathode terminal of the 3rd diode electrically connects Connect this first end of this light emitting module.

18. light-emitting diode lamp tubes according to claim 9, it is characterised in that this safety open Closing circuit and have an input/output terminal, this input/output terminal is positioned on this current supply circuit switched on, This safety switch circuit includes:

19. light-emitting diode lamp tubes according to claim 18, it is characterised in that this second is opened Close unit at least include a thyristor, this thyristor have an anode tap, a cathode terminal and One gate terminal, the anode tap of this thyristor, cathode terminal and gate terminal be electrically connected with this second This first switch terminals of switch element, second switch end and this triggering end, this triggering circuit includes:

20. light-emitting diode lamp tubes according to claim 19, it is characterised in that this triggering is tieed up Hold unit at least to include:

21. light-emitting diode lamp tubes according to claim 19, it is characterised in that this safety open Closing circuit and also include a voltage suppression diode, it has one first end and one second end, the most electrically Connect this first switch terminals of this triggering maintenance unit and this second switch unit, this triggering maintenance unit Including: