CN102768333B - Performance detection circuit for LED drive circuit - Google Patents
Performance detection circuit for LED drive circuit Download PDFInfo
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- CN102768333B CN102768333B CN201210225146.7A CN201210225146A CN102768333B CN 102768333 B CN102768333 B CN 102768333B CN 201210225146 A CN201210225146 A CN 201210225146A CN 102768333 B CN102768333 B CN 102768333B
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Abstract
The invention discloses a performance detection circuit for a light-emitting diode (LED) drive circuit. The performance detection circuit comprises a working power supply, an analog electronic load circuit, an error voltage signal amplifying circuit, a level shift amplifying circuit, a linear regulation circuit, an indicator lamp and an indicator lamp drive circuit, wherein the voltage input end of the analog electronic load circuit is connected with the anode and cathode of the LED drive circuit respectively, and the voltage output end of the analog electronic load circuit is connected with the level shift amplifying circuit by the error voltage signal amplifying circuit; the level shift amplifying circuit is connected with the linear regulation circuit, and the voltage input end of the level shift amplifying circuit is connected with the working power supply; and the linear regulation circuit is connected with the indicator lamp by the indicator lamp drive circuit. Through the adoption of the technical scheme of the invention, the detection cost of the LED drive circuit is reduced, and the performance detection circuit has universality and is convenient for detection.
Description
Technical field
The present invention relates to LED-backlit technical field, particularly relate to a kind of detecting circuit for performance of LED drive circuit.
Background technology
The display screen of increasing LCD colour TV uses the backlight technology of LED, and its advantage is life-span length, power saving, energy-conserving and environment-protective, driving convenience.The backlighting scheme of LED generally has two kinds, and one is straight-down negative, is placed directly in below screen by some LED; Another kind is side entering type, some LED is distributed in the periphery of screen, to be led uniformly by light LCD screen by light guide plate.This two schemes is all joined by several LED strip to form lamp bar (Light Bar), then carrys out driving LED by one to several constant current driven IC and lights.Drive and generally realize with constant current source, input voltage 24V obtains the suitable output of the voltage of one and lamp bar by boosting, is then that Light Bar powers by constant-current device.
Reality design and produce in be need to lamp bar drive constant current accuracy and reliability verify, common way first prepares some lamp bars, then they being attached to above heat radiator, in order to prevent lamp from dazzling, also will adding dimmer arrangement on lamp bar.Although do the duty that can get information about very much driving like this, also there is following shortcoming simultaneously:
(1) in producing, if need to verify driving in a large number, mean and will prepare a lot of lamp bars, lamp bar expensive, and take work space, be inconvenient to use;
(2) when verifying different drivings, need to prepare different lamp bars, reusability is poor;
(3) light of lamp bar is harmful to eyes, can deteriorated vision.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of detecting circuit for performance of LED drive circuit, is intended to the testing cost reducing LED drive circuit, easy to use when having versatility and detect.
The invention provides a kind of detecting circuit for performance of LED drive circuit, comprising:
Working power, for providing working power;
Simulation electronic load circuit, for simulating LED lamp bar;
Error voltage signal amplifying circuit, obtains error voltage signal for the output voltage according to described simulation electronic load circuit and amplifies;
Level shift amplifying circuit, for amplifying the level shift of described error voltage signal;
Linear regulating circuit, for simulating the loss power of LED lamp bar;
Pilot lamp, is used to indicate the duty of described simulation electronic load;
Drive circuit of indicator, the voltage signal exported for receiving described linear regulating circuit also amplifies to drive described pilot lamp work.
Preferably, the voltage input end of described simulation electronic load circuit is connected with the positive pole of described LED drive circuit and negative pole, the input end of described error voltage signal amplifying circuit is connected with the voltage output end of described simulation electronic load circuit, the voltage input end of described level shift amplifying circuit is connected with described working power, the input end of described level shift amplifying circuit is connected with the output terminal of described error voltage signal amplifying circuit, the input end of described linear regulating circuit is connected with the output terminal of described level shift amplifying circuit, the output terminal of described linear regulating circuit is connected with described pilot lamp through described drive circuit of indicator.
Preferably, described simulation electronic load circuit comprises electronic potentiometer, six electronic load groups, the resistance that each electronic load group comprises the first switch and connects with the first switch, wherein after the parallel connection of three electronic load groups, one end is connected with the positive pole of described LED drive circuit, and the other end is connected with the first input end of electronic potentiometer; After other three electronic load parallel connections, one end is connected with the negative pole of described LED drive circuit, and the other end is connected with the second input end of electronic potentiometer; 3rd input end of described electronic potentiometer is connected respectively by the negative pole of a second switch with described LED drive circuit with four-input terminal; The voltage output end of described electronic potentiometer is connected with described error voltage signal amplifying circuit.
Preferably, described error voltage signal amplifying circuit comprises a three terminal regulator, the control pole of described three terminal regulator is connected with the voltage output end of described simulation electronic load circuit, the anode of described three terminal regulator is connected with the negative pole of LED drive circuit, and the negative electrode of described three terminal regulator is connected with described level shift amplifying circuit.
Preferably, described level shift amplifying circuit comprises the first triode, the second triode, the 3rd diode, the 7th resistance, the tenth resistance, the base stage of described first triode is connected with described working power through described 7th resistance, the collector of described first triode is connected with described working power, and the emitter of described first triode is connected with described linear regulating circuit; The base stage of described second triode is connected with the negative electrode of described 3rd diode, and be connected with described working power through described tenth resistance, the emitter of described second triode is connected with the negative electrode of described three terminal regulator, and the collector of described second triode is connected with the base stage of described first triode; The anode of described 3rd diode is connected with the negative pole of described LED drive circuit.
Preferably, described linear regulating circuit comprises metal-oxide-semiconductor, 12 resistance, 11 resistance, 13 resistance, 14 resistance, the grid of described metal-oxide-semiconductor is through the 11 resistance, 14 resistance is connected with the emitter of described first triode, and through the 11 resistance, 13 resistance is connected with the negative pole of described LED drive circuit, the drain electrode of described metal-oxide-semiconductor is connected with the positive pole of described LED drive circuit, the source electrode of described metal-oxide-semiconductor is connected with the grid of described metal-oxide-semiconductor through the 12 resistance, and be connected with described 11 resistance through the 12 resistance, and be connected with described drive circuit of indicator.
Preferably, described drive circuit of indicator comprises the first diode, second diode, 3rd triode, 15 resistance, 16 resistance, the collector of described 3rd triode is connected with the negative electrode of described pilot lamp through the 16 resistance, the base stage of described 3rd triode is connected with the source electrode of described metal-oxide-semiconductor through the 15 resistance, and be connected with described 12 resistance through the 15 resistance, and through the 15 resistance, first diode, second diode is connected with the negative pole of described LED drive circuit, the emitter of described 3rd triode is connected with the negative pole of described LED drive circuit.
Preferably, the detecting circuit for performance of described LED drive circuit also comprises the negative temperature characteristic mimic channel for simulating LED electrical pressure negative temperature characteristic, and described negative temperature characteristic mimic channel is connected between described simulation electronic load circuit and described error voltage signal amplifying circuit.
Preferably, the detecting circuit for performance of described LED drive circuit also comprises the feedback compensation circuit corrected for electronic feedback, and described feedback compensation circuit is connected with described error voltage signal amplifying circuit, described level shift amplifying circuit and described negative temperature characteristic mimic channel respectively.
Preferably, described negative temperature characteristic mimic channel comprises the 4th diode, and the anode of described 4th diode is connected with the voltage output end of described simulation electronic load circuit, and the described negative electrode of the 4th diode is connected with the control pole of described three terminal regulator; Described feedback compensation circuit comprises the first electric capacity, the second electric capacity, the 8th resistance, the 9th resistance, one end of described second electric capacity is connected with the negative electrode of described three terminal regulator, and be connected with the emitter of described second triode, the other end of described second electric capacity is connected with the control pole of described three terminal regulator through described first electric capacity, and be connected with the negative pole of described LED drive circuit through the first electric capacity, the 8th resistance, and be connected through the negative electrode of described first electric capacity with described 4th diode, described 9th resistance and described first Capacitance parallel connection.
The detecting circuit for performance of a kind of LED drive circuit provided by the invention provides working power by described power supply, simulation electronic load circuit simulation LED lamp bar, error voltage signal amplifying circuit obtains error voltage signal according to the output voltage of described simulation electronic load circuit and amplifies, level shift amplifying circuit is by the level shift of described error voltage signal and amplify, the loss power of linear regulating circuit simulation LED lamp bar, pilot lamp indicates the duty of described simulation electronic load, drive circuit of indicator receives the voltage signal of described linear regulating circuit output and amplifies to drive described pilot lamp work.Therefore, detect the performance of LED drive circuit with the detecting circuit for performance alternative lamp bar of described LED drive circuit, not only cost is low, highly versatile, and easy to use.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of the detecting circuit for performance preferred embodiment of LED drive circuit of the present invention.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Technical scheme of the present invention is further illustrated below in conjunction with Figure of description and specific embodiment.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
With reference to the electrical block diagram that Fig. 1, Fig. 1 are the detecting circuit for performance preferred embodiments of LED drive circuit of the present invention.The invention provides the detecting circuit for performance that the invention provides a kind of LED drive circuit, comprising: working power VCC; Simulation electronic load circuit 10, for simulating LED lamp bar (Light Bar); Error voltage signal amplifying circuit 20, obtains error voltage signal for the output voltage according to described simulation electronic load circuit 10 and amplifies; Level shift amplifying circuit 30, for amplifying the level shift of described error voltage signal; Linear regulating circuit 40, for simulating loss power, the pilot lamp 60 of LED lamp bar (Light Bar), be used to indicate the duty of described simulation electronic load, drive circuit of indicator 50, the voltage signal exported for receiving described linear regulating circuit also amplifies to drive described pilot lamp work.
The voltage input end of described simulation electronic load circuit 10 is connected with the positive pole of described LED drive circuit and negative pole respectively, and its voltage output end is connected through the input end of described error voltage signal amplifying circuit 20 with described level shift amplifying circuit 30; The output terminal of described level shift amplifying circuit 30 is connected with the input end of described linear regulating circuit 40, and the voltage input end of described level shift amplifying circuit 30 is connected with described working power VCC; The output terminal of described linear regulating circuit 40 is connected with described pilot lamp 60 through drive circuit of indicator 50.
Described simulation electronic load circuit 10 comprises electronic potentiometer WZ, six electronic load groups.The resistance that each electronic load group comprises the first switch and connects with the first switch, wherein three electronic load groups are in parallel, these three electronic load groups specifically comprise: K switch 1 is connected with resistance R1, K switch 2 is connected with resistance R2, K switch 3 is connected with resistance R3, after the parallel connection of three electronic load groups, one end is connected with the positive pole of described LED drive circuit, and the other end is connected with the first input end of electronic potentiometer WZ; Other three electronic load parallel connections, be specially: K switch 6 is connected with resistance R4, K switch 7 is connected with resistance R5, K switch 8 is connected with resistance R6, after series connection, one end is connected with the negative pole of described LED drive circuit, and the other end is connected with second input end of electronic potentiometer WZ.3rd input end of described electronic potentiometer WZ is connected respectively by the negative pole of a second switch with described LED drive circuit with four-input terminal.Be specially: the 3rd input end is connected with the negative pole of described LED drive circuit by K switch 4, four-input terminal is connected with the negative pole of described LED drive circuit by K switch 5; The voltage output end of described electronic potentiometer WZ is connected with described error voltage signal amplifying circuit 20.This simulation electronic load circuit 10 is by the closed of the first switch (K switch 1-K3, K switch 6-K8) in electronic load group or disconnect, electronic potentiometer WZ then carries out voltage sampling to electronic load group, and select different intrinsic standoff ratios by second switch (K switch 4, K5), thus the LED lamp bar of different driving voltage can be simulated.Therefore, the LED lamp bar only needing a simulation electronic load circuit 10 just can substitute various driving voltage completes the performance detecting LED drive circuit.
Described error voltage signal amplifying circuit 20 comprises a three terminal regulator U1, the control pole of described three terminal regulator U1 is connected with the voltage output end of described simulation electronic load circuit 10, the described anode of three terminal regulator U1 is connected with the negative pole of LED drive circuit, and the negative electrode of described three terminal regulator U1 is connected with described level shift amplifying circuit 30.
Described level shift amplifying circuit 30 comprises the first triode Q1, the second triode Q2, the 3rd diode D3, the 7th resistance R7, the tenth resistance R10.Described 3rd diode D3 is voltage stabilizing diode, the base stage of described first triode Q1 is connected with working power VCC through described 7th resistance R7, the collector of described first triode Q1 is connected with working power VCC, and the emitter of described first triode Q1 is connected with described linear regulating circuit 40.The base stage of described second triode Q2 is connected with the negative electrode of described 3rd diode D3, and be connected with working power VCC through described tenth resistance R10, the emitter of described second triode Q2 is connected with the negative electrode of described three terminal regulator U1, and the collector of described second triode Q2 is connected with the base stage of described first triode Q1.The anode of described 3rd diode D3 is connected with the negative pole of described LED drive circuit.Described second triode Q2, the 3rd diode D3, the tenth resistance R10 common base, realize the displacement of level, and error voltage exports from its collector the amplification that described first triode Q1 base stage does voltage to after the second triode Q2 amplifies.
Described linear regulating circuit comprises metal-oxide-semiconductor Q, the 12 resistance R12, the 11 resistance R11, the 13 resistance R13, the 14 resistance R14.Described metal-oxide-semiconductor Q is N-channel MOS pipe, the grid of described metal-oxide-semiconductor Q is connected with the emitter of described first triode Q1 through the 11 resistance R11, the 14 resistance R14, and is connected with the negative pole of described LED drive circuit through the 11 resistance R11, the 13 resistance R13; The drain electrode of described metal-oxide-semiconductor Q is connected with the positive pole of described LED drive circuit, the source electrode of described metal-oxide-semiconductor Q is connected with the grid of described metal-oxide-semiconductor Q through the 12 resistance R12, and be connected with described 11 resistance R11 through the 12 resistance R12, and be connected with described drive circuit of indicator 50.Voltage signal after the first triode Q1 amplifies, the grid of metal-oxide-semiconductor Q is added to again after the dividing potential drop of the 12 resistance R12, the 11 resistance R11, the 13 resistance R13, the 14 resistance R14, control metal-oxide-semiconductor Q and do linear regulation, the loss power of simulation LED lamp bar.
Described drive circuit of indicator 50 comprises the first diode D1, the second diode D2, the 3rd triode Q3, the 15 resistance R15, the 16 resistance R16.The collector of described 3rd triode Q3 is connected with the negative electrode of described pilot lamp 60 through the 16 resistance R16; The base stage of described 3rd triode Q3 is divided into two-way after the 15 resistance R15 is connected with the source electrode of described metal-oxide-semiconductor Q, one tunnel the 15 resistance R15 is connected with described 12 resistance R12, and another Lu Jing 15 resistance R15, the first diode D1, the second diode D2 are connected with the negative pole of described LED drive circuit; The emitter of described 3rd triode Q3 is connected with the negative pole of described LED drive circuit.The voltage that the source electrode of metal-oxide-semiconductor Q exports by after the amplification of the 3rd triode Q3, in order to drive pilot lamp 60.If pilot lamp 60 is bright, then the LED drive circuit performance normal table detected is described, otherwise, the performance existing problems of described LED drive circuit are described.
Further, the detecting circuit for performance of described LED drive circuit also comprises the negative temperature characteristic mimic channel 80 for simulating LED electrical pressure negative temperature characteristic, and described negative temperature characteristic mimic channel 80 is connected between described simulation electronic load circuit 10 and described error voltage signal amplifying circuit 20.Particularly, described negative temperature characteristic mimic channel 80 comprises the 4th diode D4, the anode of described 4th diode D4 is connected with the voltage output end of described simulation electronic load circuit 10, and the negative electrode of described 4th diode D4 is connected with the control pole of described three terminal regulator U1.
Further, the detecting circuit for performance of described LED drive circuit also comprises the feedback compensation circuit 70 corrected for electronic feedback, described feedback compensation circuit 70 is connected with described error voltage signal amplifying circuit 20, described level shift amplifying circuit 30 and described negative temperature characteristic mimic channel 80 respectively, and feedback compensation circuit 70 makes circuit working more stable.Particularly, described feedback compensation circuit 70 comprises the first electric capacity C1, the second electric capacity C2, the 8th resistance R8, the 9th resistance R9.One end of described second electric capacity C2 is connected with the negative electrode of described three terminal regulator U1, and the other end is connected with the negative pole of described LED drive circuit through described first electric capacity C1, the 8th resistance.Described first electric capacity C1 is also connected with the control pole of described three terminal regulator U1 and the negative electrode of the 4th diode D4 respectively with the connected node of the 8th resistance R8.Described 9th resistance R9 is in parallel with described first electric capacity C1.
The detecting circuit for performance of the LED drive circuit that the embodiment of the present invention provides provides working power by working power VCC, the duty of LED lamp bar (Light Bar) simulated by simulation electronic load circuit 10, error voltage signal amplifying circuit 20 obtains error voltage signal according to the output voltage of described simulation electronic load circuit 10 and amplifies, level shift amplifying circuit 20 is by the level shift of described error voltage signal and amplify, linear regulating circuit 40 simulates the loss power of LED lamp bar (Light Bar), pilot lamp 60 indicates the duty of described simulation electronic load, drive circuit of indicator 50 receives the voltage signal of described linear regulating circuit 40 output and amplifies to drive described pilot lamp 60 to work.Therefore, detect the performance of LED drive circuit with the detecting circuit for performance alternative lamp bar (Light Bar) of described LED drive circuit, not only cost is low, highly versatile, and easy to use.In addition, it also avoid the infringement because using LED lamp bar (Light Bar) to cause the eyesight of people.
The foregoing is only the preferred embodiments of the present invention; not thereby its scope of the claims is limited; every utilize instructions of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; directly or indirectly be used in the technical field that other are relevant, be all in like manner included in scope of patent protection of the present invention.
Claims (9)
1. a detecting circuit for performance for LED drive circuit, is characterized in that, comprising:
Working power, for providing working power;
Simulation electronic load circuit, for simulating LED lamp bar;
Error voltage signal amplifying circuit, obtains error voltage signal for the output voltage according to described simulation electronic load circuit and amplifies;
Level shift amplifying circuit, for amplifying the level shift of described error voltage signal;
Linear regulating circuit, for simulating the loss power of LED lamp bar;
Pilot lamp, is used to indicate the duty of described simulation electronic load;
Drive circuit of indicator, the voltage signal exported for receiving described linear regulating circuit also amplifies to drive described pilot lamp work;
The voltage input end of described simulation electronic load circuit is connected with the positive pole of described LED drive circuit and negative pole, the input end of described error voltage signal amplifying circuit is connected with the voltage output end of described simulation electronic load circuit, and described error voltage signal amplifying circuit comprises a three terminal regulator; The voltage input end of described level shift amplifying circuit is connected with described working power, the input end of described level shift amplifying circuit is connected with the output terminal of described error voltage signal amplifying circuit, the input end of described linear regulating circuit is connected with the output terminal of described level shift amplifying circuit, and the output terminal of described linear regulating circuit is connected with described pilot lamp through described drive circuit of indicator; Described linear regulating circuit comprises metal-oxide-semiconductor, does by controlling metal-oxide-semiconductor the loss power that linear regulation simulates LED lamp bar.
2. the detecting circuit for performance of LED drive circuit according to claim 1, it is characterized in that, described simulation electronic load circuit comprises electronic potentiometer, six electronic load groups, the resistance that each electronic load group comprises the first switch and connects with the first switch, wherein after the parallel connection of three electronic load groups, one end is connected with the positive pole of described LED drive circuit, and the other end is connected with the first input end of electronic potentiometer; After other three electronic load parallel connections, one end is connected with the negative pole of described LED drive circuit, and the other end is connected with the second input end of electronic potentiometer; 3rd input end of described electronic potentiometer is connected respectively by the negative pole of a second switch with described LED drive circuit with four-input terminal; The voltage output end of described electronic potentiometer is connected with described error voltage signal amplifying circuit.
3. the detecting circuit for performance of LED drive circuit according to claim 2, it is characterized in that, the control pole of described three terminal regulator is connected with the voltage output end of described simulation electronic load circuit, the anode of described three terminal regulator is connected with the negative pole of LED drive circuit, and the negative electrode of described three terminal regulator is connected with described level shift amplifying circuit.
4. the detecting circuit for performance of LED drive circuit according to claim 3, it is characterized in that, described level shift amplifying circuit comprises the first triode, the second triode, the 3rd diode, the 7th resistance, the tenth resistance, the base stage of described first triode is connected with described working power through described 7th resistance, the collector of described first triode is connected with described working power, and the emitter of described first triode is connected with described linear regulating circuit; The base stage of described second triode is connected with the negative electrode of described 3rd diode, and be connected with described working power through described tenth resistance, the emitter of described second triode is connected with the negative electrode of described three terminal regulator, and the collector of described second triode is connected with the base stage of described first triode; The anode of described 3rd diode is connected with the negative pole of described LED drive circuit.
5. the detecting circuit for performance of LED drive circuit according to claim 4, it is characterized in that, described linear regulating circuit also comprises the 12 resistance, 11 resistance, 13 resistance, 14 resistance, the grid of described metal-oxide-semiconductor is through the 11 resistance, 14 resistance is connected with the emitter of described first triode, and through the 11 resistance, 13 resistance is connected with the negative pole of described LED drive circuit, the drain electrode of described metal-oxide-semiconductor is connected with the positive pole of described LED drive circuit, the source electrode of described metal-oxide-semiconductor is connected with the grid of described metal-oxide-semiconductor through the 12 resistance, and be connected with described 11 resistance through the 12 resistance, and be connected with described drive circuit of indicator.
6. the detecting circuit for performance of LED drive circuit according to claim 5, it is characterized in that, described drive circuit of indicator comprises the first diode, second diode, 3rd triode, 15 resistance, 16 resistance, the collector of described 3rd triode is connected with the negative electrode of described pilot lamp through the 16 resistance, the base stage of described 3rd triode is connected with the source electrode of described metal-oxide-semiconductor through the 15 resistance, and be connected with described 12 resistance through the 15 resistance, and through the 15 resistance, first diode, second diode is connected with the negative pole of described LED drive circuit, the emitter of described 3rd triode is connected with the negative pole of described LED drive circuit.
7. the detecting circuit for performance of LED drive circuit according to claim 6, it is characterized in that, the detecting circuit for performance of described LED drive circuit also comprises the negative temperature characteristic mimic channel for simulating LED electrical pressure negative temperature characteristic, and described negative temperature characteristic mimic channel is connected between described simulation electronic load circuit and described error voltage signal amplifying circuit.
8. the detecting circuit for performance of LED drive circuit according to claim 7, it is characterized in that, the detecting circuit for performance of described LED drive circuit also comprises the feedback compensation circuit corrected for electronic feedback, and described feedback compensation circuit is connected with described error voltage signal amplifying circuit, described level shift amplifying circuit and described negative temperature characteristic mimic channel respectively.
9. the detecting circuit for performance of LED drive circuit according to claim 8, it is characterized in that, described negative temperature characteristic mimic channel comprises the 4th diode, the anode of described 4th diode is connected with the voltage output end of described simulation electronic load circuit, and the described negative electrode of the 4th diode is connected with the control pole of described three terminal regulator; Described feedback compensation circuit comprises the first electric capacity, the second electric capacity, the 8th resistance, the 9th resistance, one end of described second electric capacity is connected with the negative electrode of described three terminal regulator, and be connected with the emitter of described second triode, the other end of described second electric capacity is connected with the control pole of described three terminal regulator through described first electric capacity, and be connected with the negative pole of described LED drive circuit through the first electric capacity, the 8th resistance, and be connected through the negative electrode of described first electric capacity with described 4th diode, described 9th resistance and described first Capacitance parallel connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210225146.7A CN102768333B (en) | 2012-07-02 | 2012-07-02 | Performance detection circuit for LED drive circuit |
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| CN201210225146.7A CN102768333B (en) | 2012-07-02 | 2012-07-02 | Performance detection circuit for LED drive circuit |
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| CN102768333A CN102768333A (en) | 2012-11-07 |
| CN102768333B true CN102768333B (en) | 2015-07-01 |
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| CN201210225146.7A Expired - Fee Related CN102768333B (en) | 2012-07-02 | 2012-07-02 | Performance detection circuit for LED drive circuit |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI486602B (en) * | 2013-10-08 | 2015-06-01 | Wistron Corp | Load apparatus for testing |
| CN104181426B (en) * | 2014-08-28 | 2017-06-09 | 北京铨富光电科技有限公司 | A kind of LED light source load detecting circuit of electric ballast |
| CN106604463B (en) * | 2016-12-14 | 2019-05-31 | 深圳Tcl数字技术有限公司 | LED simulator |
| CN107091981A (en) * | 2017-06-15 | 2017-08-25 | 深圳市沃特沃德股份有限公司 | Indicator lamp controls the test system of drive circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201615931U (en) * | 2009-12-22 | 2010-10-27 | 重庆四联启蓝半导体照明有限公司 | Led driver testing system |
| CN102288794A (en) * | 2011-05-12 | 2011-12-21 | 威海东兴电子有限公司 | Electronic load for testing LED (light-emitting diode) driver |
| CN102353823A (en) * | 2011-06-11 | 2012-02-15 | 东莞市创锐电子技术有限公司 | Electronic load of a semi-passive type programmable simulation LED characteristic |
| CN102353822A (en) * | 2011-06-11 | 2012-02-15 | 东莞市创锐电子技术有限公司 | Fully-passive programmable LED (Light-Emitting Diode) characteristic emulation electronic load |
| CN102486532A (en) * | 2010-12-01 | 2012-06-06 | 西安大昱光电科技有限公司 | LED (light-emitting diode) power source analysis and test system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4653857B1 (en) * | 2009-10-15 | 2011-03-16 | 株式会社計測技術研究所 | Load device |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201615931U (en) * | 2009-12-22 | 2010-10-27 | 重庆四联启蓝半导体照明有限公司 | Led driver testing system |
| CN102486532A (en) * | 2010-12-01 | 2012-06-06 | 西安大昱光电科技有限公司 | LED (light-emitting diode) power source analysis and test system |
| CN102288794A (en) * | 2011-05-12 | 2011-12-21 | 威海东兴电子有限公司 | Electronic load for testing LED (light-emitting diode) driver |
| CN102353823A (en) * | 2011-06-11 | 2012-02-15 | 东莞市创锐电子技术有限公司 | Electronic load of a semi-passive type programmable simulation LED characteristic |
| CN102353822A (en) * | 2011-06-11 | 2012-02-15 | 东莞市创锐电子技术有限公司 | Fully-passive programmable LED (Light-Emitting Diode) characteristic emulation electronic load |
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