CN106304522A - General-purpose type light-emitting diode lamp tube, power-supply system and LED driving circuit - Google Patents

General-purpose type light-emitting diode lamp tube, power-supply system and LED driving circuit Download PDF

Info

Publication number
CN106304522A
CN106304522A CN201510268631.6A CN201510268631A CN106304522A CN 106304522 A CN106304522 A CN 106304522A CN 201510268631 A CN201510268631 A CN 201510268631A CN 106304522 A CN106304522 A CN 106304522A
Authority
CN
China
Prior art keywords
electrically connected
unit
diode
pin
switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510268631.6A
Other languages
Chinese (zh)
Inventor
段强飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cooler Master Co Ltd
Original Assignee
Cooler Master Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cooler Master Co Ltd filed Critical Cooler Master Co Ltd
Priority to CN201510268631.6A priority Critical patent/CN106304522A/en
Publication of CN106304522A publication Critical patent/CN106304522A/en
Pending legal-status Critical Current

Links

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The invention discloses a kind of general-purpose type light-emitting diode lamp tube, power-supply system and LED driving circuit, its LED driving circuit includes filtering and rectification unit, power source drive unit, the first switch, safety switch unit, the first diode, the second diode, the 3rd diode and Working mode changeover unit.Power source drive unit and the first switch are electrically connected with filtering and rectification unit.Power source drive unit is in order to provide the first current supply circuit, and the first switch is electrically in order to provide the second current supply circuit.First diode and the second diode are electrically connected with light emitting diode to provide biphase rectification.Safety switch unit is just only conducting state when four pins of fluorescent tube receive the external power source that frequency range is high-frequency range, and Working mode changeover unit conducting the first switch, so that the second current supply circuit conducting.So, around not changing in the case of circuit, described fluorescent tube can be applicable to the electric power system of various existing bracket for fluorescent tube.

Description

General-purpose type light-emitting diode lamp tube, power-supply system and LED driving circuit
Technical field
The present invention relates to a kind of light emitting diode, and particularly a kind of general-purpose type light-emitting diode lamp tube and Its power-supply system, and LED driving circuit.
Background technology
The fluorescent tube of both-end energising can run into regulation security restriction during installation.Fluorescent tube traditionally is typically Both-end energising, design in recent years just has the concept introducing single-ended electrified.At traditional light fixture not yet In the case of Tao Taiing, the design according to light fixture is needed to use the both-end energising lamp of correspondence to close or single End energising fluorescent tube.When lamp is installed, in the requirement of installation process, when only one end connects lamp socket (energising) Time, the problem that can not have electric leakage when the other end not yet connects the end points of lamp socket, to prevent from installing or dismounting The personnel of light fixture get an electric shock.This regulation should be applicable to the fluorescent tube of single-ended electrified, but is energized for both-end Fluorescent tube, existing technology can be potentially encountered the difficulty in enforcement.Because, the fluorescent tube two of both-end energising End is typically conducting so that wherein during the first end energising, the second end also can speculate and be energized. Therefore, traditional way is that the lamp socket of the fluorescent tube turned on by both-end is reequiped, to avoid installing hourglass The problem of electricity.So it is likely to result in equipment cost and human cost that light fixture is changed, will also result in installation Inconvenience during light fixture.
The fluorescent tube Method for Installation restrictions system of some country existing, requires to need to lead in only one end for fluorescent tube During electricity, other end no power.And (both-end all turn-on powers) both-end to be realized is led on normal use Logical.This causes the biggest challenge for the designer of fluorescent tube.Even if by power-off, still it is difficult to ensure that Power supply does not has electricity online at present, it is also possible to cause potential safety problem.
Summary of the invention
The embodiment of the present invention provides a kind of general-purpose type light-emitting diode lamp tube and power-supply system, Yi Jifa Optical diode drive circuit, is applicable to existing both-end or the lamp of single-ended switched-on light emitting diodes fluorescent tube The power-supply system of seat, occurs in which what may leak electricity in one end when alternative traditional fluorescent tube is to avoid and installing Phenomenon, and need not change periphery (periphery) circuit of fluorescent tube.
The embodiment of the present invention provides a kind of general-purpose type light-emitting diode lamp tube, utilizes external power source luminous, General-purpose type light-emitting diode lamp tube has the first side end and the second side end, and the first side end has One pin and the second pin, the second side end has the 3rd pin and the 4th pin.Luminous at general-purpose type Be provided with LED driving circuit in diode lamp tube, LED driving circuit include filtering and Rectification unit, power source drive unit, the first switch, light emitting diode, safety switch unit, First diode, the second diode, the 3rd diode and Working mode changeover unit.Power drives Unit is electrically connected with filtering and rectification unit.First switch is electrically connected with filtering and rectification unit.Luminous Diode has the first end and the second end, and the first end and second end of light emitting diode pass through Power source drive unit electric connection filtering and rectification unit are to form the first current supply circuit, and light-emitting diodes Second end of pipe unit and the first switch are electrically connected with and form the second current supply circuit.Safety switch unit electricity 3rd pin of property connection universal formula light-emitting diode lamp tube and the 4th pin, wherein the 3rd pin and Four pins connect altogether, and wherein safety switch unit is only the first pin, the second pin, the 3rd pin and It is conducting state that four pins receive when the frequency range of external power source and external power source is high-frequency range.The The negative electrode of one diode is electrically connected with the first end of light emitting diode, and the anode of the first diode leads to Cross safety switch unit and be electrically connected with the 3rd pin and the 4th pin.The negative electrode of the second diode electrically connects Connecing the anode of the first diode, the anode of the second diode is electrically connected with and filters and rectification unit, and second The anode of diode is electrically connected with the second end of light emitting diode, and the by power source drive unit The anode of two diodes is electrically connected with the second end of light emitting diode by the first switch.Three or two The anode of pole pipe is electrically connected with the anode of the first diode.Working mode changeover unit is electrically connected with the 3rd The negative electrode of diode and the first switch, Working mode changeover unit receives external electrical by the 3rd diode Source is to control the first switch.When the frequency of external power source is positioned at high-frequency range, mode of operation switching is single Unit's conducting the first switch, when the frequency of external power source is less than high-frequency range, Working mode changeover unit It is not turned on the first switch.
In one embodiment of this invention, this filtering and rectification unit include:
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 Being electrically connected with this second pin, this power source drive unit is electrically connected with being somebody's turn to do of this first full-bridge converting unit First outfan and this second outfan, this first switch is electrically connected with this first full-bridge converting unit This second outfan, this first end of this light emitting diode is electrically connected by this power source drive unit Connecing this first outfan of this first full-bridge converting unit, this second end of this light emitting diode leads to Cross this power source drive unit and be electrically connected with this second outfan of this first full-bridge converting unit, and this This second end of optical diode unit is electrically connected with this first full-bridge converting unit by this first switch This second outfan.
In one embodiment of this invention, this filtering and rectification unit also include:
One Electromagnetic interference filter, this first power end of this first full-bridge converting unit is by this electromagnetism Interference filter is electrically connected with this first pin, and this second source end of this first full-bridge converting unit leads to Cross this Electromagnetic interference filter and be electrically connected with this second pin.
In one embodiment of this invention, this Electromagnetic interference filter is a pi type filter, this π type Wave filter includes one first electric capacity, an inductance and one second electric capacity, and this first electric capacity is electrically connected at this Between first pin and this second pin, this inductance is electrically connected at this first pin and this first full-bridge Between this first power end in converting unit, this second electric capacity is electrically connected at the conversion of this first full-bridge Between this first power end and this second source end in unit.
In one embodiment of this invention, this power source drive unit is blood pressure lowering converting unit or buck turns Change unit.
In one embodiment of this invention, this safety switch unit includes:
One second switch, has one first end, one second 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 is electrically connected with this second end of this second switch, This second outfan is electrically connected with this first end of this second switch, this first power end by this first Diode is electrically connected with this first end of this light emitting diode；
One triggers circuit；And
One start-up capacitance, has one first end and one second end, and this first end of this start-up capacitance is electrical Connecting this first power end of this second full-bridge converting unit, this second end of this start-up capacitance electrically connects Connect this second source end of this second full-bridge converting unit and this first primary side of this transformator, with shape Become one first branch road；
Wherein this first outfan of this second full-bridge converting unit and this second full-bridge converting unit should Second outfan forms one second branch road after second switch turns on；
Wherein when this light emitting diode powered by this external power source, this triggering circuit produce this second Triggering power supply needed for switch, after guaranteeing the conducting of this second switch, this external power source drives this luminescence Diode is shinny.
In one embodiment of this invention, this triggering circuit at least includes:
One the 4th diode；
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 source end, and this second primary side is electrical Connecting this external power source, this second subprime end is electrically connected with the anode tap of the 4th diode；And
One trigger maintenance unit, be electrically connected with this first secondary end, the 4th diode cathode terminal with This second end of this second switch and this triggering end.
The embodiment of the present invention provides the power-supply system of a kind of general-purpose type light-emitting diode lamp tube, including lamp socket And general-purpose type light-emitting diode lamp tube.Lamp socket provides external power source.General-purpose type light-emitting diode lamp tube Having the first side end and the second side end, the first side end has the first pin and the second pin, the Two side ends have the 3rd pin and the 4th pin.General-purpose type light-emitting diode lamp tube by the first pin, Second pin, the 3rd pin and the 4th pin set are connected on lamp socket with acquisition external power source luminous.? LED driving circuit, LED driving circuit it is provided with in general-purpose type light-emitting diode lamp tube Including filtering and rectification unit, power source drive unit, the first switch, light emitting diode, safety Switch element, the first diode, the second diode, the 3rd diode and Working mode changeover unit. Power source drive unit is electrically connected with filtering and rectification unit.First switch is electrically connected with filtering and rectification list Unit.Light emitting diode has the first end and the second end, the first end of light emitting diode and Two ends are filtered by power source drive unit electric connection and rectification unit is to form the first current supply circuit, and Second end of light emitting diode and the first switch are electrically connected with to form the second current supply circuit.Safety Switch element is electrically connected with the 3rd pin and the 4th pin, the Qi Zhong of general-purpose type light-emitting diode lamp tube Three pins and the 4th pin connect altogether, wherein safety switch unit only the first pin, the second pin, Three pins and the 4th pin receive when the frequency range of external power source and external power source is high-frequency range as leading Logical state.The negative electrode of the first diode is electrically connected with the first end of light emitting diode, the one or two pole The anode of pipe is electrically connected with the 3rd pin and the 4th pin by safety switch unit.Second diode Negative electrode is electrically connected with the anode of the first diode, and the anode of the second diode is electrically connected with filtering and rectification Unit, the anode of the second diode is electrically connected with the of light emitting diode by power source drive unit Two ends, and the anode of the second diode is by the second of the first switch electric connection light emitting diode End.The anode of the 3rd diode is electrically connected with the anode of the first diode.Working mode changeover unit electricity Property connect negative electrode and first switch of the 3rd diode, Working mode changeover unit is by the 3rd diode Receive external power source to control the first switch.When the frequency of external power source is positioned at high-frequency range, work Mode switch element conducting the first switch, when the frequency of external power source is less than high-frequency range, Working mould Formula switch unit is not turned on the first switch.
In one embodiment of this invention, filtering and rectification unit include:
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 Being electrically connected with this second pin, this power source drive unit is electrically connected with being somebody's turn to do of this first full-bridge converting unit First outfan and this second outfan, this first switch is electrically connected with this first full-bridge converting unit This second outfan, this first end of this light emitting diode is electrically connected by this power source drive unit Connecing this first outfan of this first full-bridge converting unit, this second end of this light emitting diode leads to Cross this power source drive unit and be electrically connected with this second outfan of this first full-bridge converting unit, and this This second end of optical diode unit is electrically connected with this first full-bridge converting unit by this first switch This second outfan.
In one embodiment of this invention, this filtering and rectification unit also include:
One Electromagnetic interference filter, this first power end of this first full-bridge converting unit is by this electromagnetism Interference filter is electrically connected with this first pin, and this second source end of this first full-bridge converting unit leads to Cross this Electromagnetic interference filter and be electrically connected with this second pin.
In one embodiment of this invention, this Electromagnetic interference filter is a pi type filter, this π type Wave filter includes one first electric capacity, an inductance and one second electric capacity, and this first electric capacity is electrically connected at this Between first pin and this second pin, this inductance is electrically connected at this first pin and this first full-bridge Between this first power end of converting unit, it is single that this second electric capacity is electrically connected at the conversion of this first full-bridge Between this first power end and this second source end of unit.
In one embodiment of this invention, this power source drive unit is blood pressure lowering converting unit or buck turns Change unit.
In one embodiment of this invention, this safety switch unit includes:
One second switch, has one first end, one second 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 is electrically connected with this second end of this second switch, This second outfan is electrically connected with this first end of this second switch, this first power end by this first Diode is electrically connected with this first end of this light emitting diode；
One triggers circuit；And
One start-up capacitance, has one first end and one second end, and this first end of this start-up capacitance is electrical Connecting this first power end of this second full-bridge converting unit, this second end of this start-up capacitance electrically connects Connect this second source end of this second full-bridge converting unit and this first primary side of this transformator, with shape Become one first branch road；
Wherein this first outfan of this second full-bridge converting unit and this second full-bridge converting unit should Second outfan forms one second branch road after second switch turns on；
Wherein when this light emitting diode powered by this external power source, this triggering circuit produce this second Triggering power supply needed for switch, after guaranteeing the conducting of this second switch, this external power source drives this luminescence Diode is shinny.
In one embodiment of this invention, this triggering circuit at least includes:
One the 4th diode；
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 source end, and this second primary side is electrical Connecting this external power source, this second subprime end is electrically connected with the anode tap of the 4th diode；And
One trigger maintenance unit, be electrically connected with this first secondary end, the 4th diode cathode terminal with This second end of this second switch and this triggering end.
The embodiment of the present invention provides a kind of LED driving circuit, in order to drive a light emitting diode Unit, LED driving circuit includes filtering and rectification unit, power source drive unit, first opens Pass, safety switch unit, the first diode, the second diode, the 3rd diode and mode of operation Switch unit.Power source drive unit is electrically connected with filtering and rectification unit, and it levies light emitting diode The first end and the second end by power source drive unit be electrically connected with filtering and rectification unit to form first Current supply circuit.First switch is electrically connected with filtering and rectification unit, wherein the of light emitting diode Two ends and the first switch are electrically connected with to form the second current supply circuit.Safety switch unit is electrically connected with logical With the 3rd pin and the 4th pin of formula light-emitting diode lamp tube, wherein the 3rd pin and the 4th pin are altogether Connecing, wherein safety switch unit only connects at the first pin, the second pin, the 3rd pin and the 4th pin The frequency range of receipts external power source and external power source is conducting state when being high-frequency range.First diode Negative electrode be electrically connected with light emitting diode the first end, the anode of the first diode passes through safety open Close unit and be electrically connected with the 3rd pin and the 4th pin.The negative electrode of the second diode is electrically connected with the one or two The anode of pole pipe, the anode of the second diode is electrically connected with filtering and rectification unit, the second diode Anode is electrically connected with the second end of light emitting diode, and the second diode by power source drive unit Anode by first switch be electrically connected with light emitting diode the second end.The sun of the 3rd diode Pole is electrically connected with the anode of the first diode.Working mode changeover unit is electrically connected with the 3rd diode Negative electrode and the first switch, Working mode changeover unit receives external power source to control by the 3rd diode First switch.When the frequency of external power source is positioned at high-frequency range, Working mode changeover unit conducting the One switch, when the frequency of external power source is less than high-frequency range, Working mode changeover unit is not turned on the One switch.
In one embodiment of this invention, this filtering and rectification unit include:
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 Being electrically connected with this second pin, this power source drive unit is electrically connected with being somebody's turn to do of this first full-bridge converting unit First outfan and this second outfan, this first switch is electrically connected with this first full-bridge converting unit This second outfan, this first end of this light emitting diode is electrically connected by this power source drive unit Connecing this first outfan of this first full-bridge converting unit, this second end of this light emitting diode leads to Cross this power source drive unit and be electrically connected with this second outfan of this first full-bridge converting unit, and this This second end of optical diode unit is electrically connected with this first full-bridge converting unit by this first switch This second outfan.
In one embodiment of this invention, this filtering and rectification unit also include:
One Electromagnetic interference filter, this first power end of this first full-bridge converting unit is by this electromagnetism Interference filter is electrically connected with this first pin, and this second source end of this first full-bridge converting unit leads to Cross this Electromagnetic interference filter and be electrically connected with this second pin.
In one embodiment of this invention, this Electromagnetic interference filter is a pi type filter, this π type Wave filter includes one first electric capacity, an inductance and one second electric capacity, and this first electric capacity is electrically connected at this Between first pin and this second pin, this inductance is electrically connected at this first pin and this first full-bridge Between this first power end of converting unit, it is single that this second electric capacity is electrically connected at the conversion of this first full-bridge Between this first power end and this second source end of unit.
In one embodiment of this invention, this power source drive unit is blood pressure lowering converting unit or buck turns Change unit.
In one embodiment of this invention, this safety switch unit includes:
One second switch, has one first end, one second 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 is electrically connected with this second end of this second switch, This second outfan is electrically connected with this first end of this second switch, this first power end by this first Diode is electrically connected with this first end of this light emitting diode；
One triggers circuit；And
One start-up capacitance, has one first end and one second end, and this first end of this start-up capacitance is electrical Connecting this first power end of this second full-bridge converting unit, this second end of this start-up capacitance electrically connects Connect this second source end of this second full-bridge converting unit and this first primary side of this transformator, with shape Become one first branch road；
Wherein this first outfan of this second full-bridge converting unit and this second full-bridge converting unit should Second outfan forms one second branch road after second switch turns on；
Wherein when this light emitting diode powered by this external power source, this triggering circuit produce this second Triggering power supply needed for switch, after guaranteeing the conducting of this second switch, this external power source drives this luminescence Diode is shinny.
In one embodiment of this invention, this triggering circuit at least includes:
One the 4th diode；
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 source end, and this second primary side is electrical Connecting this external power source, this second subprime end is electrically connected with the anode tap of the 4th diode；And
One trigger maintenance unit, be electrically connected with this first secondary end, the 4th diode cathode terminal with This second end of this second switch and this triggering end.
In sum, the general-purpose type light-emitting diode lamp tube of embodiment of the present invention offer and power-supply system thereof, And LED driving circuit, utilize Working mode changeover unit and safety switch unit only to exist Altofrequency makees the characteristic switched so that in general-purpose type light-emitting diode lamp tube installation process, the most logical Any one end of electricity is all without electric leakage.In the case of periphery (periphery) circuit that need not change fluorescent tube, Can directly substitute traditional fluorescent tube.
It is further understood that inventive feature and technology contents for enabling, refers to below in connection with this Bright detailed description and accompanying drawing, but these explanations are only used for institute's accompanying drawings the present invention is described, rather than The interest field of the present invention is made any restriction.
Accompanying drawing explanation
Fig. 1 is that the light emitting diode of the general-purpose type light-emitting diode lamp tube that the embodiment of the present invention provides drives The circuit block diagram of circuit；
Fig. 2 A is the first current supply circuit of the LED driving circuit that the embodiment of the present invention provides Schematic diagram；
Fig. 2 B is the second current supply circuit of the LED driving circuit that the embodiment of the present invention provides Schematic diagram；
Fig. 2 C is the second current supply circuit of the LED driving circuit that the embodiment of the present invention provides Schematic diagram；
Fig. 3 is the thin portion circuit diagram of the LED driving circuit that the embodiment of the present invention provides；
Fig. 4 is LED driving circuit and its mode of operation switching list of present example offer The thin portion circuit diagram of unit；
Fig. 5 is the electricity of the safety switch unit of the general-purpose type light-emitting diode lamp tube that present example provides Road Organization Chart；
Fig. 6 is the thin of the safety switch unit of the general-purpose type light-emitting diode lamp tube that present example provides Portion's circuit diagram；
Fig. 7 is the safety switch unit of the general-purpose type light-emitting diode lamp tube that the embodiment of the present invention provides Operation chart；
Fig. 8 is the safety switch list of the general-purpose type light-emitting diode lamp tube that another embodiment of the present invention provides The thin portion circuit diagram of unit；
Fig. 9 is that the light emitting diode of the general-purpose type light-emitting diode lamp tube that the embodiment of the present invention provides drives The schematic diagram of the Application Example of circuit；
Figure 10 is that the general-purpose type light-emitting diode lamp tube that the embodiment of the present invention provides is connected to have electronics The schematic diagram of the Application Example of the lamp socket of formula ballast；
Figure 11 is that the general-purpose type light-emitting diode lamp tube that another embodiment of the present invention provides is connected to have The schematic diagram of the Application Example of the lamp socket of inductance type ballast；
Figure 12 is that the general-purpose type light-emitting diode lamp tube that another embodiment of the present invention provides is connected to without town The schematic diagram of the Application Example of the lamp socket of stream device.
Description of reference numerals: 1-LED driving circuit；11-filtering and rectification unit；12-power supply Driver element；13-first switchs；14-light emitting diode；15-safety switch unit；16-first Diode；17-the second diode；18-the 3rd diode；19-Working mode changeover unit；A1-first Pin；A2-the second pin；B1-the 3rd pin；B2-the 4th pin；S1-the first current supply circuit；S2A、 S2B-the second current supply circuit；Cx-the first electric capacity；La-inductance；Ca-the second 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, C2-electric capacity；R1, R2-resistance；112-Electromagnetic interference filter；151-second switch；152- Second full-bridge converting unit；153-triggers circuit；154-start-up capacitance；151a-the first end；151b- Second end；151c-triggers end；152a-the first power end；152b-second source end；152c-first is defeated Go out end；152d-the second outfan；1531-the 4th diode；1532-transformator；1533-triggers maintenance Unit；P1-the first primary side；P2-the second primary side；S1-the first secondary end；S2-second subprime end； Vx-external power source；154a-the first end；154b-the second end；Br1-the first branch road；Br2-the second branch road； 155-bypass diodes；155a-anode tap；155b-cathode terminal；R3-resistance；C3-electric capacity；Lp1- First path；Lp2-the second path；156-voltage suppression diode；156a-the first end；156b-second End；10-general-purpose type light-emitting diode lamp tube；20-electronic ballast；30-inductance type ballast；31- Short-circuit component.
Detailed description of the invention
General-purpose type light-emitting diode lamp tube and power-supply system thereof, and the reality of LED driving circuit Execute example:
The general-purpose type light-emitting diode lamp tube of the present embodiment is substituted for traditional fluorescent tube, its with Traditional fluorescent tube is identical is all to connect lamp socket, and utilizes external power source and luminous.People in the art Member is readily understood by, and traditional light-emitting diode lamp tube has the first side end and the second side end, and first Side end and the second side end are respectively provided with two pins.The general-purpose type light-emitting diode lamp tube of the present embodiment Having the first side end and the second side end equally, the first side end has the first pin a1 and second and draws Foot a2, the second side end has the 3rd pin b1 and the 4th pin b2.The general-purpose type of the present embodiment is sent out Optical diode fluorescent tube is connected to the application mode of the power supply of lamp socket will be implemented in follow-up Figure 10 to Figure 12 Example describes in detail.The LED driving circuit of general-purpose type light-emitting diode lamp tube is first described at this.
As shown in Figure 1, Figure 2 shown in A, Fig. 2 B Yu Fig. 2 C, Fig. 1 is the general of embodiment of the present invention offer The circuit block diagram of the LED driving circuit of formula light-emitting diode lamp tube.Fig. 2 Yu Fig. 3 is respectively Represent the first current supply circuit S1 and second current supply circuit S2A, S2B of LED driving circuit 1. LED driving circuit 1 and light emitting diode it is provided with in general-purpose type light-emitting diode lamp tube 14, LED driving circuit 1 include filtering and rectification unit 11, power source drive unit 12, the One switch 13, safety switch unit the 15, first diode the 16, second diode the 17, the 3rd 2 pole Pipe 18 and Working mode changeover unit 19.
Power source drive unit 12 is electrically connected with filtering and rectification unit 11.First switch 13 electric connection Filtering and rectification unit 11.Light emitting diode 14 has the first end and the second end, light-emitting diodes First end of pipe unit 14 and the second end are electrically connected with filtering and rectification unit by power source drive unit 11 to form the first current supply circuit S1 (representing at Fig. 2 A), and the first current supply circuit S1 is that high frequency is powered back Road.Second end of light emitting diode 14 and the first switch 13 electric connection filtering and rectification unit 11 to form second current supply circuit S2A, S2B (representing respectively) at Fig. 2 B, Fig. 2 C, the second power supply Loop S2A, S2B are low frequency power supply loop.
Safety switch unit 15 is electrically connected with the 3rd pin b1 and of general-purpose type light-emitting diode lamp tube Four pin b2, wherein the 3rd pin b3 and the 4th pin b4 connects altogether.Safety switch unit 15 only exists First pin a1, the second pin a2, the 3rd pin b1 and the 4th pin b2 receive external power source and outer The frequency range of portion's power supply is conducting state when being high-frequency range (such as 20kHz to 60kHz).
First diode 16 and the second diode 17 are electrically connected with light emitting diode 14 to provide double To rectification.Specifically, the negative electrode of the first diode 16 is electrically connected with light emitting diode 14 First end, the anode of the first diode 16 is electrically connected with the 3rd pin b1 by safety switch unit 15 With the 4th pin b2.The negative electrode of the second diode 17 is electrically connected with the anode of the first diode 16.The The anode of two diodes 17 is electrically connected with filtering and rectification unit 11, and the anode of the second diode 17 leads to Cross power source drive unit 12 and be electrically connected with the second end of light emitting diode 14, and the second diode The anode of 17 is by the second end of the first switch 13 electric connection light emitting diode 14.Three or two The anode of pole pipe 18 is electrically connected with the anode of the first diode 16.Working mode changeover unit 19 is electrical Connecting negative electrode and first switch 13 of the 3rd diode 18, Working mode changeover unit 19 is by the 3rd Diode 18 receives external power source to control the first switch 13.When the frequency of external power source is positioned at high frequency During scope, Working mode changeover unit 19 turns on the first switch 13, when the frequency of external power source is less than During high-frequency range, Working mode changeover unit 19 is not turned on the first switch 13.
About the first current loop S1, as shown in Figure 2 A, power source drive unit 12 provide unidirectional current with Make light emitting diode 14 luminous.First current loop S1 is not to be at high frequency model at external power source When enclosing (such as 60Hz), produce current supply circuit.And about second current loop S2A, S2B, when outward The frequency of portion's power supply is when high-frequency range, then Working mode changeover unit 19 turns on the first switch 13 To bypass (bypass) power source drive unit 12.Frequency is represented at the second current loop S2A of Fig. 2 B Fall high-frequency range external power source (alternating current) by left side the first pin a1 and the second pin a2 pass Deliver to the electric current road of the half period (referred to here as positive half cycle) of right side the 3rd pin b1 and the 4th pin b2 Footpath.Represent that frequency falls in the external power source (exchange of high-frequency range at the second current loop S2A of Fig. 2 C Electricity) by right side the 3rd pin b1 and the 4th pin b2 be sent to left side the first pin a1 and second draw The current path of the half period (referred to here as negative half period) of foot a2.It addition, whether at positive half cycle still Negative half period, high frequency electric all by the 3rd diode 18 with input service mode switch element 19.The Two current loop S2A, S2B are to share the current path that the first switch 13 is provided, and difference only exists In principle based on rectification, the second current loop S2A flows through the second diode 17, and the second electric current returns Road S2B flows through the first diode 16.Feelings at the fluorescent tube of the lamp socket being applied to various power supply aspect Condition, will illustrate according to various lamp socket circuit condition one by one in follow-up.
As it is shown on figure 3, Fig. 3 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.
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 11 is pi type filter, however the present invention not because of This limits.Pi type filter includes the first electric capacity Cx, inductance La and the second electric capacity Ca.First electric capacity Cx is electrically connected between the first pin a1 and the second pin a2.Inductance La is electrically connected at first Between pin a1 and the first power end d of the first full-bridge converting unit 111.Second electric capacity Ca is electrical It is connected between the first power end d of the first full-bridge converting unit 111 and second source end e.When outward When portion's power supply inputs via the first pin a1 and the second pin a2, because impedance produced by inductance La, This pi type filter can make power supply substantially be inputted the first full-bridge converting unit 111 by second source end e.
As shown in Figure 4, Fig. 4 is LED driving circuit and its work of present example offer The thin portion circuit diagram of operation mode switch unit.Working mode changeover unit 19 include parallel connection electric capacity C1, C2, resistance R1 and resistance R2 are to form high-pass filtering circuit.Input by the 3rd diode 18 High frequency electric for, the cut-off frequency fz size that electric capacity C1 and resistance R1 is formed is:
f Z 1 2 π R 1 C 1 ,
So, for high frequency electric, Working mode changeover unit 19 is compared to light emitting diode 14 have higher impedance, so that the electric current of the overwhelming majority is by light emitting diode 14, therefore Do not affect the work of light emitting diode 14.Then, input is to Working mode changeover unit 19 High frequency electric source can turn on the first switch 13.Further, electric capacity C2 is in order to maintain leading of the first switch 13 Energising pressure.Such as, negative half inputted by right side the 3rd pin b1 and the 4th pin b2 at high frequency electric In week (with reference to Fig. 2 C), high frequency electric makes Working mode changeover unit 19 turn on the first switch 13, electric capacity The capacitance of C2 is optional relatively big, at least to maintain the voltage of a half cycle, thereby high frequency electric by The positive half cycle (with reference to Fig. 2 B) of the first pin a1 and the second pin a2 input in left side can maintain conducting the One switch 13.It addition, when the frequency of external power source is not positioned at high-frequency range (or referred to as low-frequency power) Time, then turn off this first switch 13.Above-mentioned cut-off frequency fz may be used to determine aforesaid high-frequency range Interval, but the most therefore the present invention limits the interval of high-frequency range.The first above-mentioned switch 13 is permissible Being transistor switch, such as metal-oxide half field effect transistor (MOSFET), but the most therefore the present invention limits.
As it is shown in figure 5, Fig. 5 is the safety of the general-purpose type light-emitting diode lamp tube that present example provides The circuit framework figure of switch element.From the beginning of Fig. 5, external power source represents with Vx, in order to help Bright.Safety switch unit 15 is electrically connected with the of light emitting diode 14 by the first diode 16 One end, by the of the second diode 17 and the first switch 13 electric connection light emitting diodes 14 Two ends.Safety switch unit 15 includes second switch the 151, second full-bridge converting unit 152, triggers Circuit 153 and start-up capacitance 154.
Second switch 151 has the first end 151a, the second end 151b and triggers end 151c.Full-bridge Converting unit 152 has the first power end 152a, second source end 152b, the first outfan 152c And the second outfan 152d.First outfan 152c connects the second end 151b of second switch 151, Second outfan 152d connect second switch 151 the first end 151a, the first power end 152a in order to (by rectifier cells such as first diode 16 of Fig. 1 and the second diodes 17) connecting luminous diode Unit 14.
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 connection second source end 122, second Primary side P2 connects external power source, second subprime end S2 by the 3rd pin b1 and the 4th pin b2 Jointed anode end.Triggering maintenance unit 1533 connects the first secondary end S1, cathode terminal and second and opens Close the second end 151b and triggering end 151c of 151.
First end of start-up capacitance 154 connect second full-bridge converting unit the 152, first diode 16 with Second diode 17 connection end point each other, the second end 142 of start-up capacitance 154 connects transformation First primary side P1 of device 1532.In one embodiment, the capacitance example that start-up capacitance 154 has As between 470 × 10-12 farad to 2.2 × 10-9 farad, but the most therefore the present invention limits.
When external power source Vx power supply light emitting diode unit 14, trigger maintenance unit 1533 and produce Triggering power supply needed for second switch 151, after guaranteeing second switch 151 conducting, external power source Vx Driven for emitting lights diode 14 is shinny.In other words, in the loop of above-mentioned safety switch unit, first After triggering second switch 151 conducting Guan Bi by high frequency electric, further keep high frequency electric mutual inductance The electric current of device, with realize safety switch unit 15 offer guarantee to install the merit of safety of hot line job 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 151 just can turn on, and then external power source Vx driven for emitting lights diode 14 is luminous, so, can Prevent user from the situation that light-emitting diode lamp tube occurs to get an electric shock being installed, to guarantee the person of user Safety.Be applied to the operation of light-emitting diode lamp tube as safety switch unit 15, will follow-up enter one Step explanation.
As shown in Figure 6, Fig. 6 is the safety of the general-purpose type light-emitting diode lamp tube that present example provides The thin portion circuit diagram of switch element.It is single that first end 154a of start-up capacitance 154 connects the second full-bridge conversion The first power end 152a, the second end 154b of unit 152 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 152 connects the first end of second switch 151 151a, to form the second branch road Br2.
In the present embodiment, second switch 151 includes at least one switch element, and switch element has First end 151a, the second end 151b and triggering end 151c.Trigger maintenance unit 1533 to include at least One resistance capacitance group, and described resistance capacitance group is connected in series with electric capacity C3 by resistance R3, to be formed First connects end, the second connection end and connects end altogether.Described first connects end connects the 4th diode The cathode terminal of 1531, described second connects end connects the second end 151b of at least one switch element, institute State the triggering end 151c connecing end at least one switch element of connection altogether.It is worth mentioning, wherein said resistance The quantity of capacitance group is equal with the quantity of switch element, for the present embodiment, and the quantity of switch element It it is three, so the quantity of resistance capacitance group also corresponds to three groups.
On reality is applied, use multiple switch element string generally for the pressure security consideration of insulation Connection framework, as shown in Figure 6.Additionally, described switch element can be preferably a thyristor (silicon Controlled rectifier, SCR), therefore, the first end 151a, the second end 151b and triggering end 151c Be respectively the anode (anode, A) of thyristor, negative electrode (cathode, K) with gate pole (gate, G).
Then, as it is shown in fig. 7, Fig. 7 is the general-purpose type LED light lamp that the embodiment of the present invention provides The operation chart of the safety switch unit of pipe.For convenience of explanation, open with second in the present embodiment Close 151 and there is explanation as a example by a switch element.Additionally, also assume that external power source Vx is an exchange Power supply.But, actual application is not with above-mentioned condition for limiting.
When external power source Vx is positive half period power supply light emitting diode unit 14, external power source Vx First start-up capacitance 154 charging being set up a charging voltage, charging voltage is via the first branch road Br1 and change Depressor 1532 turns on the 4th diode 1531, and by triggering the resistance capacitance group of maintenance unit 1533 Setting up a trigger voltage, by triggering end 151c to trigger second switch 151, and then conducting second is opened Close 151.The signal of said process, can be on Fig. 7 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, and therefore, when frequency is the highest, start-up capacitance 154 hinders Anti-the least, so, under high frequency operation, this start-up capacitance 154 is charged institute by external power source Vx The charging voltage set up, just turns on second switch 151 via the first branch road Br1.
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 said process, can be Fig. 7 Shown in upper one second path Lp2.It is worth mentioning, before turning on due to second switch 151, external electrical Source Vx cannot transmit power supply via the second branch road Br2, therefore, if with safety switch unit 15 for one For the angle of individual switch, safety switch unit 15 is the state turning off (turned off).In other words, External power source Vx to transmit the condition of power supply via safety switch unit 15, is safety switch unit 15 is conduction status, that is, under positive half cycle operates, external power source Vx needs first via the first via After footpath Lp1 triggers and turns on second switch 151, then provide external electrical via the second path Lp2 The transmission path of source Vx.
So, the technical characteristics of the present embodiment can be realized: " send out when external power source Vx powers During optical diode unit 14, trigger maintenance unit 1533 and produce the triggering electricity needed for second switch 151 Source, after guaranteeing second switch 151 conducting, external power source Vx driven for emitting lights diode 14 Bright." so, it can be ensured that before user installation fluorescent tube completes to lamp socket, do not have external power source Vx Occur for conducting the situation of fluorescent tube, therefore can prevent user from light-emitting diode lamp tube generation being installed The situation got an electric shock, 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 151 Turn at negative half period, therefore, return the operation of positive half cycle once external power source Vx, will pass through again First path Lp1 persistently triggers and turns on second switch 151, and is provided by the second path Lp2 The transmission path of power supply.
Then, as shown in Figure 8, Fig. 8 is the general-purpose type light-emitting diodes that another embodiment of the present invention provides The thin portion circuit diagram of the safety switch unit of spot pipe.In this embodiment, safety switch unit 15 In addition to including aforementioned second switch the 151, second full-bridge converting unit 152 and triggering circuit 153, Also include voltage suppression diode 156.Wherein voltage suppression diode 156 can be transient voltage suppressing Device (transient voltage suppresser, TVS).Voltage suppression diode 156 has the first end 1561 With the second end 1562, wherein the first end 1561 connects the second output of the second full-bridge converting unit 152 End 152d and the first end 151a of second switch 151, the second end 1562 connects triggering maintenance unit 1533。
Furthermore, second switch 151 includes switch element, and switch element have the first end 151a, Two end 151b and triggering end 151c.Trigger maintenance unit 1533 and mainly include zener diode and electricity Resistance capacitance group.Resistance capacitance group is connected in parallel by a resistance and an electric capacity, to form one first connection end It is connected end with one second, and described resistance capacitance group is connected in parallel zener diode, as shown in Figure 8. First connects end connects the second end 156b of voltage suppression diode 156 and the triggering of second switch 151 End 151c, second connects the second end 151b of end connecting valve unit 151.
When external power source Vx power supply light emitting diode unit 14, via the ballast in power-supply system Changed the igniting high voltage produced trigger and turn on second switch 151 so that external power source Vx Driven for emitting lights diode 14 is shinny.Voltage suppression diode 156 is in order to suppress triggering second switch 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 151, also or adjust the output characteristics of ballast, with in response to without installing The applicable cases of voltage suppression diode 156.
As it is shown in figure 9, Fig. 9 is sending out of the general-purpose type light-emitting diode lamp tube of embodiment of the present invention offer The schematic diagram of the Application Example of optical diode drive circuit.The circuit of Fig. 9 is in order to represent one of which Actual circuit performance.Represent with the example of step-down controller (Buck converter) in fig .9 The power source drive unit 12 of Fig. 1.But the most therefore the present invention limits, power source drive unit 12 also may be used To 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 power source drive unit 12, repeat no more.
Then, the application mode of the general-purpose type light-emitting diode lamp tube of the embodiment of the present invention is gone on to say. The general-purpose type light-emitting diode lamp tube so-called " general-purpose type " of the present embodiment means that the present embodiment is carried The light-emitting diode lamp tube gone out is applicable to the inductance type ballast of collocation low frequency (50Hz～60Hz) lighting (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 the operating instruction seeing Figure 10 to Figure 12 and correspondence thereof.
Figure 10 is that the general-purpose type light-emitting diode lamp tube that the embodiment of the present invention provides is connected to have electronics The schematic diagram of the Application Example of the lamp socket of formula ballast.General-purpose type light-emitting diode lamp tube 10 is connected to One lamp socket (not shown), described lamp socket includes electronic ballast 20 and connection universal formula light-emitting diodes First pin a1 of spot pipe, the second pin a2, the 3rd pin b1, electrically the connecting of the 4th pin b2 Access node structure.In other words, by general-purpose type light-emitting diode lamp tube 10 is installed on lamp socket, and lead to Cross external power source Vx to power, to form the power-supply system of overall light-emitting diode lamp tube.This power supply System includes lamp socket and general-purpose type light-emitting diode lamp tube 10, and lamp socket provides external power source Vx.Fluorescent tube Lighting situation as described below.In this situation, external power source is that (external power source is at high frequency model for high frequency electric source Enclose (such as 20kHz to 60kHz), as shown in Fig. 2 B, Fig. 2 C and Figure 10.Referring concurrently to Fig. 2 B With Figure 10, it is assumed that when positive half cycle operates, the first pin a1 (with the second pin a2) passes through electronic type town Stream device 20 is electrically connected with external power source Vx and obtains positive voltage, and what external power source Vx turned on supplies circuit Footpath (high frequency current supply circuit S2A) is entered filtering and rectification unit by the first pin a1 (with the second pin a2) 11, light emitting diode 14, then arrive with the second diode 17 via the first switch 13 of conducting Safety switch unit 15 (now safety switch unit 15 turns on), the most again by safety switch unit 15 To the 3rd pin b1 (with the 4th pin b2).When negative half period operates, referring to Fig. 2 C and figure 10, the 3rd pin b1 (drawing b2 with the 4th) are electrically connected with external power source Vx by electronic ballast 20 And obtain positive voltage, power source path by the 3rd pin b1 (with the 4th pin b2) to safety switch unit 15, then to the first diode 16, then arrive light emitting diode 14, opening through the first of conducting Close 13 and arrive filtering and rectification unit 11 again, then to the first pin a1 (with the second pin a2).
Figure 11 is that the general-purpose type light-emitting diode lamp tube that another embodiment of the present invention provides is connected to have The schematic diagram of the Application Example of the lamp socket of inductance type ballast.Lamp socket includes inductance type ballast 30, Inductance type ballast 30 has input and outfan.When general-purpose type light-emitting diode lamp tube 10 groups connects When lamp socket, the first pin a1 of general-purpose type light-emitting diode lamp tube 10 and the 3rd pin b1 is by short Circuit component 31 is directly connected to.Second pin a2 of general-purpose type light-emitting diode lamp tube 10 connects inductance type The outfan of ballast 30.External power source Vx is connected to the of general-purpose type light-emitting diode lamp tube 10 Two pin a2 and the input of inductance type ballast 30, and then to general-purpose type light-emitting diode lamp tube 10 Power supply.The lighting situation of fluorescent tube is as described below.In this situation, external power source is low-frequency power (external electrical Source is not at high-frequency range (such as 60Hz), as shown in Fig. 2 A Yu Figure 11.No matter power supply is just half Week operation or negative half period operation, filtering and rectification unit 11 are all by whole for the alternating current of external power source Vx Stream is direct current, and provides direct current to supply electricity to power source drive unit 12.Specifically, it is assumed that grasp at positive half cycle When making, external power source Vx provides positive voltage to the second pin a2, and external power source Vx is by the second pin A2 input current (makes power drives list after filtering and rectification unit 11 rectification to filtering and rectification unit 11 Unit's 12 driven for emitting lights diodes 14), then filtering and rectification unit 11 rectification produce output electricity Flowing by the first pin output a1, 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 and 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. When negative half period operates, the current path of external power source Vx conducting is the confession circuit that positive half cycle grasps when doing The reverse path in footpath, namely by the 4th pin b2 to the 3rd pin b1, then by the 3rd pin b1 To the first pin a1, the most again by the first pin a1 to second pin a2 (by filtering and rectification unit Export after 11 rectifications), eventually pass back to external power source Vx.Same, safety switch unit 15 is not Conducting.
Figure 12 is that the general-purpose type light-emitting diode lamp tube that another embodiment of the present invention provides is connected to without town The schematic diagram of the Application Example of the lamp socket of stream device.When general-purpose type light-emitting diode lamp tube 10 groups is connected on lamp During seat, the 3rd pin b1 of general-purpose type light-emitting diode lamp tube 10 and the 4th pin b2 is that sky meets (no connection,N.C.).What external power source Vx was connected to general-purpose type light-emitting diode lamp tube 10 first draws Foot a1 and the second pin, and then general-purpose type light-emitting diode lamp tube 10 is powered.In other words, ginseng According to Fig. 1, it is the confession utilizing power source drive unit 12 to control light emitting diode 14 in this situation Electricity.Under this electric power thus supplied, the whether positive half cycle of external power source or negative half period, filtering and rectification list The external power source Vx of exchange is all converted into direct current and supplies electricity to power source drive unit 12, power drives list by unit Light emitting diode 14 is directly powered by unit 12, and safety switch unit 15 is not turned on.Now, Owing to external power source Vx is low-frequency power 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.
Beneficial effects of the present invention is as follows:
In sum, the embodiment of the present invention is provided general-purpose type light-emitting diode lamp tube and power supply system thereof System, and LED driving circuit, it is adaptable to the fluorescent tube of electronic ballast can also be by this The general-purpose type light-emitting diode lamp tube of bright embodiment is directly replaced, it is not necessary to change periphery circuit.It is suitable for Fluorescent tube in inductance type ballast can also be straight by the general-purpose type light-emitting diode lamp tube of the embodiment of the present invention Take over and change, be not necessary to change circuit (being generally disposed on lamp socket) around.For straight-through electric main (nothing External ballast) situation, the general-purpose type light-emitting diode lamp tube of the embodiment of the present invention also can directly make With, do not affect its mode of operation.Thereby, it can be ensured that fluorescent tube is installed and the safety of hot line job.
The foregoing is only embodiments of the invention, it also is not used to limit to protection scope of the present invention.

Claims (21)

1. a general-purpose type light-emitting diode lamp tube, it is characterised in that it utilizes an external power source luminous, This general-purpose type light-emitting diode lamp tube has one first side end and one second side end, this first side Portion has one first pin and one second pin, and this second side end has one the 3rd pin and the 4th Pin, is provided with a LED driving circuit luminous with one in this general-purpose type light-emitting diode lamp tube Diode, wherein this LED driving circuit includes:
One filtering and rectification unit；
One power source drive unit, is electrically connected with this filtering and rectification unit, wherein this light emitting diode list One first end and one second end of unit are electrically connected with this filtering and rectification unit by this power source drive unit To form one first current supply circuit；
One first switch, be electrically connected with this filtering and rectification unit, wherein this light emitting diode This second end electrically forms one second current supply circuit with this first switch；
One safety switch unit, be electrically connected with the 3rd pin of this general-purpose type light-emitting diode lamp tube with 4th pin, wherein the 3rd pin connects altogether with the 4th pin, and wherein this safety switch unit is only This first pin, this second pin, the 3rd pin and the 4th pin receive this external power source and It it is conducting state when the frequency range of this external power source is a high-frequency range；
One first diode, the negative electrode of this first diode is electrically connected with being somebody's turn to do of this light emitting diode First end, the anode of this first diode by this safety switch unit be electrically connected with the 3rd pin with 4th pin；
One second diode, the negative electrode of this second diode is electrically connected with the anode of this first diode, The anode of this second diode is electrically connected with this first full-bridge converting unit, the anode of this second diode This second end of this light emitting diode, and the two or two it is electrically connected with by this power source drive unit The anode of pole pipe is electrically connected with this second end of this light emitting diode by this first switch；
One the 3rd diode, the anode of the 3rd diode is electrically connected with the anode of this first diode； And
One Working mode changeover unit, is electrically connected with negative electrode and this first switch of the 3rd diode, This Working mode changeover unit receives this external power source by the 3rd diode and first opens controlling this Closing, wherein when the frequency of this external power source is positioned at this high-frequency range, this Working mode changeover unit is led This first switch logical, when the frequency of this external power source is less than this high-frequency range, this mode of operation switches Unit is not turned on this first switch.
General-purpose type light-emitting diode lamp tube the most according to claim 1, it is characterised in that this filter Involve rectification unit to include:
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 Being electrically connected with this second pin, this power source drive unit is electrically connected with being somebody's turn to do of this first full-bridge converting unit First outfan and this second outfan, this first switch is electrically connected with this first full-bridge converting unit This second outfan, this first end of this light emitting diode is electrically connected by this power source drive unit Connecing this first outfan of this first full-bridge converting unit, this second end of this light emitting diode leads to Cross this power source drive unit and be electrically connected with this second outfan of this first full-bridge converting unit, and this This second end of optical diode unit is electrically connected with this first full-bridge converting unit by this first switch This second outfan.
General-purpose type light-emitting diode lamp tube the most according to claim 2, it is characterised in that this filter Involve rectification unit also to include:
One Electromagnetic interference filter, this first power end of this first full-bridge converting unit is by this electromagnetism Interference filter is electrically connected with this first pin, and this second source end of this first full-bridge converting unit leads to Cross this Electromagnetic interference filter and be electrically connected with this second pin.
General-purpose type light-emitting diode lamp tube the most according to claim 3, it is characterised in that this electricity Magnetic disturbance wave filter is a pi type filter, this pi type filter include one first electric capacity, an inductance with One second electric capacity, this first electric capacity is electrically connected between this first pin and this second pin, this electricity Electronasty is connected between this first power end in this first pin and this first full-bridge converting unit, This first power end that this second electric capacity is electrically connected in this first full-bridge converting unit and this second electricity Between source.
General-purpose type light-emitting diode lamp tube the most according to claim 1, it is characterised in that this electricity Source driver element is blood pressure lowering converting unit or buck converting unit.
General-purpose type light-emitting diode lamp tube the most according to claim 1, it is characterised in that this peace Full switch unit includes:
One second switch, has one first end, one second 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 is electrically connected with this second end of this second switch, This second outfan is electrically connected with this first end of this second switch, this first power end by this first Diode is electrically connected with this first end of this light emitting diode；
One triggers circuit；And
One start-up capacitance, has one first end and one second end, and this first end of this start-up capacitance is electrical Connecting this first power end of this second full-bridge converting unit, this second end of this start-up capacitance electrically connects Connect this second source end of this second full-bridge converting unit and this first primary side of this transformator, with shape Become one first branch road；
Wherein this first outfan of this second full-bridge converting unit and this second full-bridge converting unit should Second outfan forms one second branch road after second switch turns on；
Wherein when this light emitting diode powered by this external power source, this triggering circuit produce this second Triggering power supply needed for switch, after guaranteeing the conducting of this second switch, this external power source drives this luminescence Diode is shinny.
General-purpose type light-emitting diode lamp tube the most according to claim 6, it is characterised in that this touches Power Generation Road at least includes:
One the 4th diode；
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 source end, and this second primary side is electrical Connecting this external power source, this second subprime end is electrically connected with the anode tap of the 4th diode；And
One trigger maintenance unit, be electrically connected with this first secondary end, the 4th diode cathode terminal with This second end of this second switch and this triggering end.
8. the power-supply system of a general-purpose type light-emitting diode lamp tube, it is characterised in that including:
One lamp socket a, it is provided that external power source；And
One general-purpose type light-emitting diode lamp tube, has one first side end and one second side end, and this is years old One side end has one first pin and one second pin, this second side end have one the 3rd pin with One the 4th pin, by this first pin, this second pin, the 3rd pin and the 4th pin set It is connected on this lamp socket to obtain this external power source and luminous, sets in this general-purpose type light-emitting diode lamp tube Having a LED driving circuit and a light emitting diode, wherein this light emitting diode drives electricity Road includes:
One filtering and rectification unit；
One power source drive unit, is electrically connected with this filtering and rectification unit, wherein this light emitting diode list One first end and one second end of unit are electrically connected with this filtering and rectification unit by this power source drive unit To form one first current supply circuit；
One first switch, be electrically connected with this filtering and rectification unit, wherein this light emitting diode This second end and this first switch are to form one second current supply circuit；
One safety switch unit, be electrically connected with the 3rd pin of this general-purpose type light-emitting diode lamp tube with 4th pin, wherein the 3rd pin connects altogether with the 4th pin, and wherein this safety switch unit is only This first pin, this second pin, the 3rd pin and the 4th pin receive this external power source and It it is conducting state when the frequency range of this external power source is a high-frequency range；
One first diode, the negative electrode of this first diode is electrically connected with being somebody's turn to do of this light emitting diode First end, the anode of this first diode by this safety switch unit be electrically connected with the 3rd pin with 4th pin；
One second diode, the negative electrode of this second diode is electrically connected with the anode of this first diode, The anode of this second diode is electrically connected with this filtering and rectification unit, and the anode of this second diode leads to Cross this power source drive unit and be electrically connected with this second end of this light emitting diode, and the two or two pole The anode of pipe is electrically connected with this second end of this light emitting diode by this first switch；
One the 3rd diode, the anode of the 3rd diode is electrically connected with the anode of this first diode； And
One Working mode changeover unit, is electrically connected with negative electrode and this first switch of the 3rd diode, This Working mode changeover unit receives this external power source by the 3rd diode and first opens controlling this Closing, wherein when when being positioned at this high-frequency range of this external power source, the conducting of this Working mode changeover unit should First switch, when the frequency of this external power source is less than this high-frequency range, this Working mode changeover unit It is not turned on this first switch.
The power-supply system of general-purpose type light-emitting diode lamp tube the most according to claim 8, its feature Being, filtering and rectification unit include:
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 Being electrically connected with this second pin, this power source drive unit is electrically connected with being somebody's turn to do of this first full-bridge converting unit First outfan and this second outfan, this first switch is electrically connected with this first full-bridge converting unit This second outfan, this first end of this light emitting diode is electrically connected by this power source drive unit Connecing this first outfan of this first full-bridge converting unit, this second end of this light emitting diode leads to Cross this power source drive unit and be electrically connected with this second outfan of this first full-bridge converting unit, and this This second end of optical diode unit is electrically connected with this first full-bridge converting unit by this first switch This second outfan.
The power-supply system of general-purpose type light-emitting diode lamp tube the most according to claim 9, it is special Levying and be, this filtering and rectification unit also include:
One Electromagnetic interference filter, this first power end of this first full-bridge converting unit is by this electromagnetism Interference filter is electrically connected with this first pin, and this second source end of this first full-bridge converting unit leads to Cross this Electromagnetic interference filter and be electrically connected with this second pin.
The power-supply system of 11. general-purpose type light-emitting diode lamp tubes according to claim 10, it is special Levying and be, this Electromagnetic interference filter is a pi type filter, and this pi type filter includes one first electricity Hold, an inductance and one second electric capacity, this first electric capacity is electrically connected at this first pin and second draws with this Between foot, this inductance is electrically connected at this first electricity of this first pin and this first full-bridge converting unit Between source, this second electric capacity be electrically connected at this first power end of this first full-bridge converting unit with Between this second source end.
The power-supply system of 12. general-purpose type light-emitting diode lamp tubes according to claim 8, it is special Levying and be, this power source drive unit is blood pressure lowering converting unit or buck converting unit.
The power-supply system of 13. general-purpose type light-emitting diode lamp tubes according to claim 8, it is special Levying and be, this safety switch unit includes:
One second switch, has one first end, one second 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 is electrically connected with this second end of this second switch, This second outfan is electrically connected with this first end of this second switch, this first power end by this first Diode is electrically connected with this first end of this light emitting diode；
One triggers circuit；And
One start-up capacitance, has one first end and one second end, and this first end of this start-up capacitance is electrical Connecting this first power end of this second full-bridge converting unit, this second end of this start-up capacitance electrically connects Connect this second source end of this second full-bridge converting unit and this first primary side of this transformator, with shape Become one first branch road；
Wherein this first outfan of this second full-bridge converting unit and this second full-bridge converting unit should Second outfan forms one second branch road after second switch turns on；
Wherein when this light emitting diode powered by this external power source, this triggering circuit produce this second Triggering power supply needed for switch, after guaranteeing the conducting of this second switch, this external power source drives this luminescence Diode is shinny.
The power-supply system of 14. general-purpose type light-emitting diode lamp tubes according to claim 13, it is special Levying and be, this triggering circuit at least includes:
One the 4th diode；
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 source end, and this second primary side is electrical Connecting this external power source, this second subprime end is electrically connected with the anode tap of the 4th diode；And
One trigger maintenance unit, be electrically connected with this first secondary end, the 4th diode cathode terminal with This second end of this second switch and this triggering end.
15. 1 kinds of LED driving circuit, in order to drive a light emitting diode, its feature Being, this LED driving circuit includes:
One filtering and rectification unit；
One power source drive unit, is electrically connected with this filtering and rectification unit, wherein this light emitting diode list One first end and one second end of unit are electrically connected with this filtering and rectification unit by this power source drive unit To form one first current supply circuit；
One first switch, be electrically connected with this filtering and rectification unit, wherein this light emitting diode This second end electrically forms one second current supply circuit with this first switch；
One safety switch unit, be electrically connected with the 3rd pin of this general-purpose type light-emitting diode lamp tube with 4th pin, wherein the 3rd pin connects altogether with the 4th pin, and wherein this safety switch unit is only This first pin, this second pin, the 3rd pin and the 4th pin receive this external power source and It it is conducting state when the frequency range of this external power source is a high-frequency range；
One first diode, the negative electrode of this first diode is electrically connected with being somebody's turn to do of this light emitting diode First end, the anode of this first diode by this safety switch unit be electrically connected with the 3rd pin with 4th pin；
One second diode, the negative electrode of this second diode is electrically connected with the anode of this first diode, The anode of this second diode is electrically connected with this first full-bridge converting unit, the anode of this second diode This second end of this light emitting diode, and the two or two it is electrically connected with by this power source drive unit The anode of pole pipe is electrically connected with this second end of this light emitting diode by this first switch；
One the 3rd diode, the anode of the 3rd diode is electrically connected with the anode of this first diode； And
One Working mode changeover unit, is electrically connected with negative electrode and this first switch of the 3rd diode, This Working mode changeover unit receives this external power source by the 3rd diode and first opens controlling this Closing, wherein when the frequency of this external power source is positioned at this high-frequency range, this Working mode changeover unit is led This first switch logical, when the frequency of this external power source is less than this high-frequency range, this mode of operation switches Unit is not turned on this first switch.
16. LED driving circuit according to claim 15, it is characterised in that this filter Involve rectification unit to include:
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 Being electrically connected with this second pin, this power source drive unit is electrically connected with being somebody's turn to do of this first full-bridge converting unit First outfan and this second outfan, this first switch is electrically connected with this first full-bridge converting unit This second outfan, this first end of this light emitting diode is electrically connected by this power source drive unit Connecing this first outfan of this first full-bridge converting unit, this second end of this light emitting diode leads to Cross this power source drive unit and be electrically connected with this second outfan of this first full-bridge converting unit, and this This second end of optical diode unit is electrically connected with this first full-bridge converting unit by this first switch This second outfan.
17. LED driving circuit according to claim 16, it is characterised in that this filter Involve rectification unit also to include:
One Electromagnetic interference filter, this first power end of this first full-bridge converting unit is by this electromagnetism Interference filter is electrically connected with this first pin, and this second source end of this first full-bridge converting unit leads to Cross this Electromagnetic interference filter and be electrically connected with this second pin.
18. LED driving circuit according to claim 17, it is characterised in that this electricity Magnetic disturbance wave filter is a pi type filter, this pi type filter include one first electric capacity, an inductance with One second electric capacity, this first electric capacity is electrically connected between this first pin and this second pin, this electricity Electronasty is connected between this first power end of this first pin and this first full-bridge converting unit, should Second electric capacity is electrically connected at this first power end and this second source end of this first full-bridge converting unit Between.
19. LED driving circuit according to claim 15, it is characterised in that this electricity Source driver element is blood pressure lowering converting unit or buck converting unit.
20. LED driving circuit according to claim 15, it is characterised in that this peace Full switch unit includes:
One second switch, has one first end, one second 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 is electrically connected with this second end of this second switch, This second outfan is electrically connected with this first end of this second switch, this first power end by this first Diode is electrically connected with this first end of this light emitting diode；
One triggers circuit；And
One start-up capacitance, has one first end and one second end, and this first end of this start-up capacitance is electrical Connecting this first power end of this second full-bridge converting unit, this second end of this start-up capacitance electrically connects Connect this second source end of this second full-bridge converting unit and this first primary side of this transformator, with shape Become one first branch road；
Wherein this first outfan of this second full-bridge converting unit and this second full-bridge converting unit should Second outfan forms one second branch road after second switch turns on；
Wherein when this light emitting diode powered by this external power source, this triggering circuit produce this second Triggering power supply needed for switch, after guaranteeing the conducting of this second switch, this external power source drives this luminescence Diode is shinny.
21. LED driving circuit according to claim 20, it is characterised in that this touches Power Generation Road at least includes:
One the 4th diode；
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 source end, and this second primary side is electrical Connecting this external power source, this second subprime end is electrically connected with the anode tap of the 4th diode；And
One trigger maintenance unit, be electrically connected with this first secondary end, the 4th diode cathode terminal with This second end of this second switch and this triggering end.
CN201510268631.6A 2015-05-22 2015-05-22 General-purpose type light-emitting diode lamp tube, power-supply system and LED driving circuit Pending CN106304522A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510268631.6A CN106304522A (en) 2015-05-22 2015-05-22 General-purpose type light-emitting diode lamp tube, power-supply system and LED driving circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510268631.6A CN106304522A (en) 2015-05-22 2015-05-22 General-purpose type light-emitting diode lamp tube, power-supply system and LED driving circuit

Publications (1)

Publication Number Publication Date
CN106304522A true CN106304522A (en) 2017-01-04

Family

ID=57633321

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510268631.6A Pending CN106304522A (en) 2015-05-22 2015-05-22 General-purpose type light-emitting diode lamp tube, power-supply system and LED driving circuit

Country Status (1)

Country Link
CN (1) CN106304522A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102278724A (en) * 2011-03-14 2011-12-14 连展科技（深圳）有限公司 Safety lamp tube
US20130038230A1 (en) * 2011-03-11 2013-02-14 Nularis Inc. Method and apparatus to facilitate coupling an led-based lamp to a fluorescent light fixture
US20140125253A1 (en) * 2012-09-05 2014-05-08 Great Eagle Lighting Corporation Led ballast controller device
CN104540304A (en) * 2015-01-16 2015-04-22 邓树兴 Electronic replacement-type double-end straight-tube LED fluorescent lamp and safety protection circuit thereof
CN204442771U (en) * 2015-02-10 2015-07-01 讯强电子(惠州)有限公司 Safety switching apparatus, general-purpose type light-emitting diode lamp tube and power-supply system thereof
CN204810599U (en) * 2015-05-22 2015-11-25 讯强电子(惠州)有限公司 All -purpose emitting diode fluorescent tube, electrical power generating system and emitting diode drive circuit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130038230A1 (en) * 2011-03-11 2013-02-14 Nularis Inc. Method and apparatus to facilitate coupling an led-based lamp to a fluorescent light fixture
CN102278724A (en) * 2011-03-14 2011-12-14 连展科技（深圳）有限公司 Safety lamp tube
US20140125253A1 (en) * 2012-09-05 2014-05-08 Great Eagle Lighting Corporation Led ballast controller device
CN104540304A (en) * 2015-01-16 2015-04-22 邓树兴 Electronic replacement-type double-end straight-tube LED fluorescent lamp and safety protection circuit thereof
CN204442771U (en) * 2015-02-10 2015-07-01 讯强电子(惠州)有限公司 Safety switching apparatus, general-purpose type light-emitting diode lamp tube and power-supply system thereof
CN204810599U (en) * 2015-05-22 2015-11-25 讯强电子(惠州)有限公司 All -purpose emitting diode fluorescent tube, electrical power generating system and emitting diode drive circuit

Similar Documents

Publication Publication Date Title
CN105101543B (en) Led drive circuit
CN102752940B (en) High-efficiency LED (light-emitting diode) drive circuit and drive method thereof
CN105720840B (en) Power conversion unit and its setting method
CN103442501B (en) Forced constant flow source dimming LED (Light Emitting Diode) lamp
CN204442771U (en) Safety switching apparatus, general-purpose type light-emitting diode lamp tube and power-supply system thereof
CN105577003A (en) Switch power supply with active power factor correction function
CN103874267B (en) A kind of solar street light
CN201690655U (en) Flyback road lamp illuminating LED constant-current driving power supply with intelligent dimming function
KR101838548B1 (en) Flyback booster circuit, LED backlight driving circuit and liquid crystal display
CN103825437B (en) Alternating current (ac)-direct current (dc) power booster and ac-dc power control module for ac and dc illuminations
CN101420813A (en) Digital addressable illumination control system and method thereof
CN107454712A (en) Display device, lighting device and can simultaneously constant current and constant pressure output power circuit
CN103647448B (en) Integrated step-down-flyback type high power factor constant current circuit and device
CN205005298U (en) LED lamps and lanterns of switch mixing of colors and control circuit thereof
CN105430829A (en) Self-powered buck-boost LED drive power supply device and method thereof
CN102238793B (en) Control circuit and control method of high-strength gas discharge lamp
CN204810599U (en) All -purpose emitting diode fluorescent tube, electrical power generating system and emitting diode drive circuit
CN103001498B (en) Backlight-driven direct-current booster topology circuit
CN106304522A (en) General-purpose type light-emitting diode lamp tube, power-supply system and LED driving circuit
CN205792257U (en) Backlight drive circuit and television set
CN205005320U (en) Driving circuit of light -emitting diode (LED) fluorescent tube
CN106941316A (en) A kind of non-bridge PFC circuits
CN104349544A (en) LED driving apparatus and illuminating device
CN105873315A (en) Safety switch circuit
TWM507626U (en) Universal LED tube, power system of the universal LED tube and LED driving circuit

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20170104

WD01 Invention patent application deemed withdrawn after publication