CN202385328U - Alternating current LED illuminating lamp capacitor transformation short circuit protective circuit - Google Patents
Alternating current LED illuminating lamp capacitor transformation short circuit protective circuit Download PDFInfo
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- CN202385328U CN202385328U CN2011201876700U CN201120187670U CN202385328U CN 202385328 U CN202385328 U CN 202385328U CN 2011201876700 U CN2011201876700 U CN 2011201876700U CN 201120187670 U CN201120187670 U CN 201120187670U CN 202385328 U CN202385328 U CN 202385328U
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Abstract
The utility model relates to an alternating current LED illuminating lamp capacitor transformation short circuit protective circuit. The capacitor number in a capacitor combination is determined. The voltage transformation is realized by the alternation of the series charging and the parallel discharging of the capacitor combination. A short circuit protective circuit is formed by primary and auxiliary transistors. An NPN triode is taken as a series/parallel alteration switch of the capacitor combination. The capacitor number of the capacitor combination is N=2, N=3, or N=4. An output negative terminal of a bridge rectifier is forwardly connected with a triode base electrode biased voltage dividing diode. An output terminal of the bridge rectifier is connected with a capacitor and transistor combined circuit, wherein a crystal triode serves as the series/parallel alteration switch of the capacitor combination. The voltage transformation is realized by the alternation of the series charging and the parallel discharging of the capacitor combination. A short circuit overcurrent protective part which is formed by primary and auxiliary two-pole transistors is included. The circuit is reliable in circuit performance and is low in cost, and is especially suitable for the production of civil illuminating lamps, such as the 1W, 2W, 3W, and 4W LEDs, desk lamps, corridor lamps, and architectural lamps. The circuit can make the LED products enter into ordinary families rapidly.
Description
Technical field
The present invention relates to lighting technology, belong to the LED lighting technical field of electrical lighting technology.
Technical background
LED is that a kind of efficient is high, light quality is good, energy consumption is little, the life-span is long, the new type light source of reliability and durability, safety and environmental protection, lighting field replace photoelectric efficiency extremely low with fluorescent lamp incandescent lamp and contaminated environment (containing the pollution of mercury element and high-frequency electromagnetic) be trend of the times.Because LED is low-voltage direct device (white light LEDs monomer rated voltage is generally 3～3.5 volts), adopt 220 volts of power supplies of interchange to need through ac-dc conversion and output voltage and the adaptive drive circuit of load.
The scheme and the type of the drive circuit of AC LED lamp mainly contain at present:
1, isobaric rectification scheme: the input that alternating current directly is added to rectification circuit carries out rectification.There is not the voltage transformation loss in it, but it requires loaded work piece voltage to match.For example; Obtain about 300 volts direct current after 220 volts of direct rectifications of alternating current, through the pressure-stabilizing constant flow circuit, adaptive with it series connection white light LEDs monomer is 85～95; This makes troubles for freely selecting of load size, can't satisfy the diversified requirement of product specification.
2, step-down rectifier scheme: reduce the voltage of alternating current earlier, be added to rectification circuit again and carry out rectification.Mainly contain transformer type and resistance-capacitance depressurization type.
There is bigger voltage transformation loss in the transformer type, and as with rectification again after the appendiron core transformer step-down, efficient is very low.Though it can satisfy the requirement of various loaded work piece voltages, problems such as electric energy loss is big, device volume is big, weight is big, heating is serious have been brought.This type is difficult in the LED electricity-saving lamp, adopt.
The resistance-capacitance depressurization type is the electric capacity of input series connection (bleeder resistance of parallel connection simultaneously) at alternating current, reaches the purpose of step-down with the alternating voltage that reduces rectification circuit input end.Advantage be simple, cost is low; Shortcoming is that the power factor of resistance-capacitance depressurization circuit is very low, and the power factor of the big more circuit of capacitance-resistance pressure drop is low more.For example use the LED lamp of resistance-capacitance depressurization drives 1.5W, power factor is merely about 0.30, and apparent power is approaching or surpass 5W, compares the price height with fluorescent lamp and does not say that energy-conservation aspect does not also have advantage.
3, Switching Power Supply drive scheme: this type drive circuit is a main product in the market; They can realize higher efficient; But technology complicated (generally comprise rectification, conversion, pulse-width modulation, transformation, switching process) again, circuit element is many, cost is high.Because the LED Switching Power Supply must miniaturization, on switching frequency, must pursue frequency that also will be higher so high, make circuit produce very important harmonic wave, cause electromagnetic pollution to electrical network and space environment.In addition, this type LED drives the technical characterstic of following Switching Power Supply at present, generally all is big electric current, low pressure output type, and they are fit to drive the light emitting module of being made up of the high-power monomer of the LED more than the 1W relatively.Because the heating of the high-power monomer of LED is concentrated, high temperature causes the aggravation of LED light decay influence useful life in the lamp housing, has to adopt metal module and metal lamp housing to dispel the heat again.Like this, the LED illuminating lamp price of a 3～5W be in 40～70 yuan just not at all surprising, and 40～70 yuan be the electricity charge of 15W compact fluorescent lamp about 3 years.In addition, produce the LED lamp of metal lamp housing in a large number, will significantly increase the consumption of the metal (mainly being aluminium) and the energy, make popularizing of LED lamp become difficult, complicated.
To the problems referred to above; This case first inventor has developed out and has exchanged 220 volts of LED illuminating lamp transforming circuit for capacitor; And declare utility model patent (application number: 200920273526.1 on November 23rd, 2009; Announced mandate), it is intermediary's carrier of voltage and current conversion that this circuit adopts the capacitance group cooperation, with the serial connection charge of electric capacity combination and the realization voltage transformation that hockets of parallel discharge; Confirm the electric capacity number N in the electric capacity combination by the loaded work piece voltage request; Confirm the capacity of electric capacity by the loaded work piece current requirements, with electric capacity and some crystal diodes connect into can be when rectifying device be exported relative high voltage by serial connection charge, each electric capacity can parallel discharge when rectifying device was exported relative low-voltage circuit structure, and with the series connection/parallel inverter switch of transistor as the electric capacity combination; Pulsating current with rectification output is the switch synchronizing signal, comes the efficient voltage-regulation that realizes adapting to the low-power LED light emitting module.Sampling shows; It is 220 volts of LED illuminating lamps of efficient, simple, inexpensive interchange drive circuit; But still do not have short-circuit protection function; Can not reach GB19510.14 " control device the 14th part of lamp: led module is with the specific (special) requirements of direct current or the alternating electron control device " standard of implementing on December 1st, 2010, therefore need improve with perfect.
Summary of the invention
The present invention is an AC LED lighting lamp capacitor transforming short-circuit protection circuit.Its innovation part is:
On the basis of 220 volts of LED illuminating lamps of former interchange transforming circuit for capacitor; Adopt a spot of common contactless small size components and parts to realize the short-circuit protection function of circuit output end, and can make this short-circuit protection circuit possess sensitive load overcurrent protection function through meticulous adjustment.Its theory diagram is seen accompanying drawing 1, and the electric part that light fixture is complete is made up of rectification, capacitor transforming, short-circuit protection, current stabilization control, low-power LED module five parts, and the application only relates to rectification, capacitor transforming, three links of short-circuit protection.
The constituted mode of circuit and principle are:
Capacitor transforming partly places 220 volts of AC rectification outputs; When Rectified alternating current (voltage) is in the waveform rising (being higher than electric capacity two pole tensions); Triode ends, and circuit charges to N series capacitance, and the charging voltage of every electric capacity is about N/one of circuit crest voltage; When Rectified alternating current (voltage) is in waveform decline (being lower than electric capacity two pole tensions), the triode conducting, N capacitor discharges with parallel way, and circuit output voltage is about N/one of circuit crest voltage, and output current is about N capacitor discharge amount sum.So continue circulation, circuit has just been realized the high efficiency conversion of voltage by high step-down.
Short-circuit protection partly is connected capacitor transforming part cathode output end; Constitute (seeing accompanying drawing 2, accompanying drawing 3, accompanying drawing 4 short-circuit protection parts) by major-minor two-staged transistor circuit; Main transistor (adopting triode or FET ability) is protection action transistor, and auxilliary transistor is an oxide-semiconductor control transistors, and main transistor emitter (or source electrode) connects a current sampling resistor; When electric current during less than set point; Auxilliary triode ends, and by biasing resistor the bias current (voltage) of main transistor, main transistor saturation conduction is provided; When output short-circuit or electric current during greater than set point, auxilliary triode conducting causes that main transistor ends, and circuit is closed.When main transistor adopts common triode, can form 10 volts of above pressure drops during circuit turn-on and produce certain loss, it is changed to FET can obviously improve this situation.
Be characterized in:
Thereby 1, select number N and the height of capacitance decision output voltage and the size of electric current of electric capacity in the electric capacity combination.In theory, V
2=V
1/ N (V in the formula
1Dc voltage average value, V for the rectification acquisition
2Dc voltage average value for output); I
2=NI
1(I in the formula
1Current average, I for capacitor discharge
2Direct current mean value for output); The output voltage of side circuit, output current need be provided by experiment.
2, through bridge rectifier, electric capacity charging and discharging frequency is per second 100 times, and circuit working is at pulsating direct current and dc state, and no high-frequency electromagnetic pollutes;
3, the charging and discharging of electric capacity has suppressed the influence of electrical network clutter to load effectively, and circuit working state is stable, is convenient to be connected with voltage stabilizing control current circuit, forms the LDE drive circuit of high quality and high efficiency.
4, short-circuit protection does not adopt the big device of relay equal-volume, and is sensitive reliable;
5, circuit is simple; Components and parts are common inexpensive; Be particularly suited for the manufacturing of the honest and clean domestic lighting lamps of property favorable rates such as desk lamps such as 1W, 2W, 3W, 4WLED, passageway lamp, decorative lamp; Make them become the open circuit product that LED novel green energy-conserving light source gets into ordinary family rapidly, have considerable energy saving benefit, environmental benefit and economic benefit.
The concrete connected mode of circuit:
Adopting the NPN triode is the fundamental type of this circuit as the series connection/parallel inverter switch of electric capacity combination, and the electric capacity number in the electric capacity combination is N (N=2 or N=3 or N=4; Get N＞4; Output voltage is low; Circuit cost and volume increase, and practicality weakens), connect a triode basis set biasing dividing potential drop diode (hereinafter to be referred as the dividing potential drop diode) at the negative terminal forward of bridge rectifier output; The negative terminal of first electric capacity of electric capacity combination connects the positive pole of dividing potential drop diode; First capacitance cathode is through being connected to the anode of rectification output end with the diode of reversal of power, and the negative pole of N electric capacity is connected to the anode that the collector electrode of switching transistor, positive pole are connected to rectification output end, if electric capacity combination number N is greater than 2; The negative pole warp of these (individual) electric capacity beyond first electric capacity, N electric capacity and reversal of power diode be connected on the positive pole of rectification output negative terminal dividing potential drop diode, anodal through being connected to the anode of rectification output end with the diode of reversal of power, thereby constitute the parallel discharge passage; Before and after first electric capacity to the N electric capacity between electric capacity, be connected a diode with the power supply forward between front capacitance cathode and rear adjacent electric capacity negative pole, thus formation serial connection charge passage; Transistor base signal fixed resistance is connected on the anode and negative terminal of rectification output; Transistor base links to each other with the negative terminal of rectification output; Emitter connects the positive pole of rectification output negative terminal dividing potential drop diode, and the positive and negative polarities of N electric capacity are respectively the positive and negative two ends that capacitor transforming is partly exported; The collector electrode of short-circuit protection master triode links to each other with the anode that capacitor transforming is partly exported; Also connect biasing resistor and auxilliary triode high potential biasing resistor simultaneously; Main transistor emitter connects current sampling resistor; Base stage links to each other with the biasing resistor other end, auxilliary transistor collector; Auxilliary transistor base links to each other with the high potential biasing resistor other end, electronegative potential biasing resistor, and auxilliary transistor emitter links to each other with the electronegative potential biasing resistor other end, the current sampling resistor other end, and this tie point is the anodal output point of circuit.
When foregoing circuit adopts the positive-negative-positive triode as electric capacity combined serial/parallel inverter switch, because of positive-negative-positive triode electric power polarity is just in time opposite with NPN type triode, so circuit need only do to satisfy the change of its electric power polarity.Its mode of connecting and composing is: the anodal forward at the bridge rectifier output connects a triode basis set biasing dividing potential drop diode; The positive pole of first electric capacity links to each other with the negative pole of dividing potential drop diode; The negative pole of first electric capacity links to each other through the end negative pole of discharge path diode with rectification output; The positive pole of N electric capacity is connected to the collector electrode of switch triode, the negative terminal that negative pole is connected to rectification output end; If electric capacity combination number N is greater than 2; The negative pole warp of these (individual) electric capacity beyond first electric capacity, the N electric capacity is connected rectification output negative terminal with the reversal of power diode, anodal process is connected the negative pole of dividing potential drop diode with the power supply forward diode, thereby constitutes the parallel discharge passage; Between electric capacity, front electric capacity negative pole is connected a forward diode with the rear adjacent capacitance cathode before and after first electric capacity to the N electric capacity, thereby constitutes the serial connection charge passage; Transistor base signal fixed resistance is connected on the anode and negative terminal of rectification output; Transistor base links to each other with the anode of rectification output; Emitter connects the negative pole of rectification output negative terminal dividing potential drop diode, and the both positive and negative polarity of N electric capacity is respectively the positive and negative two ends that capacitor transforming is partly exported; The collector electrode of short-circuit protection master triode links to each other with capacitor transforming part cathode output end; Also connect biasing resistor and auxilliary triode high potential biasing resistor simultaneously; Main transistor emitter connects current sampling resistor; Base stage links to each other with the biasing resistor other end, auxilliary transistor collector; Auxilliary transistor base links to each other with the high potential biasing resistor other end, electronegative potential biasing resistor, and auxilliary transistor emitter links to each other with the electronegative potential biasing resistor other end, the current sampling resistor other end, and this tie point is anodal output point.Triode basis set biasing dividing potential drop diode substitutes with the resistance of resistance suitable (0.5K Ω～30K Ω) in the transforming circuit for capacitor, and circuit is still set up.
Electric capacity in the combination of transforming circuit for capacitor electric capacity generally adopts electrochemical capacitor, and in order to prolong the useful life of circuit, replaceable one-tenth polarity free capacitor is like CBB electric capacity, electric capacity of the dacron etc.
When circuit adopts FET as electric capacity combined serial/parallel inverter switch; According to the corresponding NPN triode of N channel field-effect pipe, the corresponding PNP triode of P-channel field-effect transistor (PEFT) pipe, be connected with the mode of the corresponding transistor collector of drain electrode of the corresponding transistor emitter of source electrode of the corresponding transistor base of grid of field-effect transistor, field-effect transistor, field-effect transistor.
When adopting field-effect transistor, connect according to the mode of the corresponding transistor collector of drain electrode of the corresponding transistor emitter of source electrode of the corresponding transistor base of grid of field-effect transistor, field-effect transistor, field-effect transistor as the short-circuit protection main transistor.
Description of drawings
Accompanying drawing 1 is an AC LED lighting lamp capacitor transforming short-circuit protection circuit theory diagram;
Accompanying drawing 2 is an AC LED lighting lamp capacitor transforming short-circuit protection circuit electric capacity combination structural representation;
Accompanying drawing 4 is that a routine short-circuit protection main transistor adopts the 2W of N channel field-effect pipe to exchange 220 volts of LED illuminating lamp capacitor transforming short-circuit protection circuits.
Embodiment
Theory diagram of the present invention is seen accompanying drawing 1, and embodiment is the example explanation with accompanying drawing 4.In the accompanying drawing 4:
1 is silicon rectification bridge, adopts 1A/400V;
2 is high-frequency filter capacitor, adopts 102/630V;
3 is transistor base signal fixed resistance, adopts 1/4W300K Ω;
4 for triode basis set biasing dividing potential drop diode, adopts 1N4007;
5 electric capacity make up first electric capacity, adopt 2.2 μ F/400V electrochemical capacitors;
6 is the first capacitor discharge path high potential diode, adopts 1N4007;
7 for electric capacity makes up second electric capacity and first electric capacity charging path diode, adopts 1N4007;
8 is the capacitor transforming switch triode, adopts MPSA42;
9 for electric capacity makes up second electric capacity, adopts 2.2 μ F/400V electrochemical capacitors;
10 short-circuit protections are assisted triode high potential biasing resistor, 1/4W240K Ω;
11 short-circuit protection field-effect transistor biasing resistors, 1/4W300K Ω;
12 short-circuit protection field-effect transistors (short-circuit protection main transistor) adopt IRF710;
13 is the short circuit current protection sample resistance, adopts 1/2W200 Ω;
14 short-circuit protections are assisted triode, adopt MPSA42;
15 short-circuit protections are assisted triode electronegative potential biasing resistor, adopt 1/4W650 Ω.
The circuit working principle is following:
The input that 220 volts of 50 hertz of sinusoidal acs add to silicon rectification bridge (1) carries out rectification, forms the pulsating direct current of about 300 volts (peak value of 220 volts of civil powers is 318 volts) per seconds 100 times at output.When Rectified alternating current (voltage) is in the waveform rising (being higher than electric capacity (5,9) two pole tensions); Triode (8) is in cut-off state because of base potential is lower than the emitter current potential; Circuit charges (electric current is from rectification circuit output end positive pole → second electric capacity (9) → second electric capacity and first electric capacity charge tunnel diode (7) → first electric capacity (5) → triode basis set biasing dividing potential drop diode (4) → rectification circuit output end negative pole) to two series capacitors, and the charging voltage of every electric capacity is about 1/2nd of circuit crest voltage; When Rectified alternating current (voltage) is in waveform decline (being lower than capacitor two pole tensions); Triode (8) is in conducting state because of base potential is higher than the emitter current potential; Electric capacity (9) discharge; Electric capacity (5) is through discharge path high potential diode (6) also discharge simultaneously, and circuit output voltage is about 1/2nd of circuit crest voltage, and output current is about two capacitor discharge amount sums.So continue circulation, circuit has just been realized the high efficiency conversion of voltage by high step-down.
Short-circuit protection partly is connected capacitor transforming part cathode output end; When electric current during less than set point; Pressure drop on the current sampling resistor (13) is not enough so that auxilliary triode (14) conducting, by biasing resistor (11) bias voltage of FET (12) grid, FET saturation conduction is provided; When output short circuit or electric current during greater than set point; Pressure drop on the current sampling resistor (13) makes auxilliary triode (14) conducting, and FET (12) loses gate bias voltage, between source electrode and drain electrode, forms very high impedance; Circuit is closed, thereby realize short circuit (comprising the load overcurrent) defencive function.
Behind this circuit, add upper level current stabilization control circuit, can stablize and drive illuminating module efficiently, constitute the 2W LED illuminating lamp (referring to electric part) of an inexpensive practicality by 36～38 low-power LED monomers (paster or direct insertion) series connection.
Claims (6)
1. AC LED lighting lamp capacitor transforming short-circuit protection circuit; It is characterized in that; Confirm the electric capacity number N in the electric capacity combination; With the serial connection charge of electric capacity combination and the realization voltage transformation that hockets of parallel discharge, and be connected with major-minor transistor formation short-circuit protection circuit, adopting the NPN triode is the fundamental type of this circuit as the series connection/parallel inverter switch of electric capacity combination; Electric capacity number in the electric capacity combination is N=2 or N=3 or N=4; Negative terminal forward in bridge rectifier output connects a triode basis set biasing dividing potential drop diode, and the negative terminal of first electric capacity of electric capacity combination connects the positive pole of dividing potential drop diode, and first capacitance cathode is through being connected to the anode of rectification output end with the diode of reversal of power; The negative pole of N electric capacity is connected to the collector electrode of switching transistor, the anode that positive pole is connected to rectification output end; If on the positive pole that electric capacity combination number N is connected rectification output negative terminal dividing potential drop diode greater than the negative pole warp and the reversal of power diode of these electric capacity beyond 2, the first electric capacity, the N electric capacity, anodal through being connected to the anode of rectification output end, thereby constitute the parallel discharge passage with the diode of reversal of power; Before and after first electric capacity to the N electric capacity between electric capacity, be connected a diode with the power supply forward between front capacitance cathode and rear adjacent electric capacity negative pole, thus formation serial connection charge passage; Transistor base signal fixed resistance is connected on the anode and negative terminal of rectification output; Transistor base links to each other with the negative terminal of rectification output; Emitter connects the positive pole of rectification output negative terminal dividing potential drop diode, and the positive and negative polarities of N electric capacity are respectively the positive and negative two ends that capacitor transforming is partly exported; The collector electrode of short-circuit protection master triode links to each other with the anode that capacitor transforming is partly exported; Also connect biasing resistor and auxilliary triode high potential biasing resistor simultaneously; Main transistor emitter connects current sampling resistor; Base stage links to each other with the biasing resistor other end, auxilliary transistor collector; Auxilliary transistor base links to each other with the high potential biasing resistor other end, electronegative potential biasing resistor, and auxilliary transistor emitter links to each other with the electronegative potential biasing resistor other end, the current sampling resistor other end, and this tie point is the anodal output point of circuit.
2. AC LED lighting lamp transforming circuit for capacitor according to claim 1; It is characterized in that; When adopting the positive-negative-positive triode as electric capacity combined serial/parallel inverter switch; Its mode of connecting and composing is: the anodal forward at the bridge rectifier output connects a triode basis set biasing dividing potential drop diode; The positive pole of first electric capacity links to each other with the negative pole of dividing potential drop diode; The negative pole of first electric capacity links to each other through the end negative pole of discharge path diode and rectification output, and the positive pole of N electric capacity is connected to the negative terminal that the collector electrode of switch triode, negative pole are connected to rectification output end, if electric capacity makes up number N greater than 2; The negative pole warp of these electric capacity beyond first electric capacity, the N electric capacity is connected rectification output negative terminal with the reversal of power diode, anodal process is connected the negative pole of dividing potential drop diode with the power supply forward diode, thereby constitutes the parallel discharge passage; Between electric capacity, front electric capacity negative pole is connected a forward diode with the rear adjacent capacitance cathode before and after first electric capacity to the N electric capacity, thereby constitutes the serial connection charge passage; Transistor base signal fixed resistance is connected on the anode and negative terminal of rectification output; Transistor base links to each other with the anode of rectification output; Emitter connects the negative pole of rectification output negative terminal dividing potential drop diode, and the both positive and negative polarity of N electric capacity is respectively the positive and negative two ends that capacitor transforming is partly exported; The collector electrode of short-circuit protection master triode links to each other with capacitor transforming part cathode output end; Also connect biasing resistor and auxilliary triode high potential biasing resistor simultaneously; Main transistor emitter connects current sampling resistor; Base stage links to each other with the biasing resistor other end, auxilliary transistor collector; Auxilliary transistor base links to each other with the high potential biasing resistor other end, electronegative potential biasing resistor, and auxilliary transistor emitter links to each other with the electronegative potential biasing resistor other end, the current sampling resistor other end, and this tie point is anodal output point.
3. require described AC LED lighting lamp capacitor transforming short-circuit protection circuit according to right 1; It is characterized in that; Adopt the series connection/parallel inverter switch of field-effect transistor as the electric capacity combination; According to the corresponding NPN triode of N channel field-effect pipe, the corresponding PNP triode of P-channel field-effect transistor (PEFT) pipe, be connected with the mode of the corresponding transistor collector of drain electrode of the corresponding transistor emitter of source electrode of the corresponding transistor base of grid of field-effect transistor, field-effect transistor, field-effect transistor.
4. 220 volts of LED illuminating lamps of interchange according to claim 1 capacitor transforming short-circuit protection circuit is characterized in that, triode basis set biasing dividing potential drop diode can substitute with the resistance of 0.5K Ω～30K Ω in the transforming circuit for capacitor.
5. AC LED lighting lamp capacitor transforming short-circuit protection circuit according to claim 1; It is characterized in that; Adopt field-effect transistor as the short-circuit protection main transistor, connect according to the mode of the corresponding transistor collector of drain electrode of the corresponding transistor emitter of source electrode of the corresponding transistor base of grid of field-effect transistor, field-effect transistor, field-effect transistor.
6. AC LED lighting lamp capacitor transforming short-circuit protection circuit according to claim 1 is characterized in that the capacitor element of being adopted comprises electrochemical capacitor and polarity free capacitor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201876700U CN202385328U (en) | 2011-06-07 | 2011-06-07 | Alternating current LED illuminating lamp capacitor transformation short circuit protective circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201876700U CN202385328U (en) | 2011-06-07 | 2011-06-07 | Alternating current LED illuminating lamp capacitor transformation short circuit protective circuit |
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| CN202385328U true CN202385328U (en) | 2012-08-15 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103152913A (en) * | 2012-05-29 | 2013-06-12 | 四川新力光源股份有限公司 | Alternating current rectifying circuit and alternating current rectifying method for driving light-emitting diode (LED) module |
| CN104219853A (en) * | 2014-09-22 | 2014-12-17 | 小米科技有限责任公司 | Illumination control method and device |
| CN104661402A (en) * | 2013-01-31 | 2015-05-27 | 四川新力光源股份有限公司 | LED module serving as light source of lighting device |
| CN104936332A (en) * | 2014-03-20 | 2015-09-23 | 东林科技股份有限公司 | Method for driving light-emitting diode chip |
| CN109257845A (en) * | 2018-09-26 | 2019-01-22 | 深圳市中州远光照明科技有限公司 | A kind of the LED power supply and its adjusting method of changeable frequency |
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2011
- 2011-06-07 CN CN2011201876700U patent/CN202385328U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103152913A (en) * | 2012-05-29 | 2013-06-12 | 四川新力光源股份有限公司 | Alternating current rectifying circuit and alternating current rectifying method for driving light-emitting diode (LED) module |
| CN103152914A (en) * | 2012-05-29 | 2013-06-12 | 四川新力光源股份有限公司 | Alternating current rectifying circuit and alternating current rectifying method for driving light-emitting diode (LED) module |
| CN103152913B (en) * | 2012-05-29 | 2015-01-28 | 四川新力光源股份有限公司 | Alternating current rectifying circuit and alternating current rectifying method for driving light-emitting diode (LED) module |
| CN103152914B (en) * | 2012-05-29 | 2015-01-28 | 四川新力光源股份有限公司 | Alternating current rectifying circuit and alternating current rectifying method for driving light-emitting diode (LED) module |
| CN104661402A (en) * | 2013-01-31 | 2015-05-27 | 四川新力光源股份有限公司 | LED module serving as light source of lighting device |
| CN104661402B (en) * | 2013-01-31 | 2017-03-29 | 四川新力光源股份有限公司 | A kind of LED module as light source of illumination device |
| CN104936332A (en) * | 2014-03-20 | 2015-09-23 | 东林科技股份有限公司 | Method for driving light-emitting diode chip |
| CN104219853A (en) * | 2014-09-22 | 2014-12-17 | 小米科技有限责任公司 | Illumination control method and device |
| CN104219853B (en) * | 2014-09-22 | 2017-03-15 | 小米科技有限责任公司 | Illumination control method and device |
| CN109257845A (en) * | 2018-09-26 | 2019-01-22 | 深圳市中州远光照明科技有限公司 | A kind of the LED power supply and its adjusting method of changeable frequency |
| CN109257845B (en) * | 2018-09-26 | 2020-05-01 | 深圳市中州远光照明科技有限公司 | LED power supply with variable frequency and adjusting method thereof |
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