CN101262722A - LED lighting device - Google Patents
LED lighting device Download PDFInfo
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- CN101262722A CN101262722A CNA2007100379357A CN200710037935A CN101262722A CN 101262722 A CN101262722 A CN 101262722A CN A2007100379357 A CNA2007100379357 A CN A2007100379357A CN 200710037935 A CN200710037935 A CN 200710037935A CN 101262722 A CN101262722 A CN 101262722A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The invention discloses an LED lighting device which comprises a shell, an LED housed in the shell and a drive power that is electrically connected with the LED. The drive power comprises a power input end, a rectifier filtering unit, a voltage conversion unit, an output unit, a switch unit, a PFC control unit and a constant voltage and constant current control unit. The constant voltage and constant current control unit comprises a constant voltage unit and a constant current unit; the constant voltage unit and the constant current unit respectively collect signals of the output unit and generate feedback signals to the PFC control unit. The PFC control unit regulates control signals according to the feedback signals received and controls periodic conduction and disconnection of the switch unit, so as to regulate the period of the conduction and disconnection of the switch unit, thereby regulating the output of the voltage conversion unit, realizing accurate regulation of the output and improving power factors.
Description
[technical field]
The present invention relates to a kind of lighting device, or rather, relate to a kind of LED lighting device with driving power.
[background technology]
LED has advantages such as environmental protection, energy-conservation, life-span be long and is regarded as the 21 century lighting source, has now begun to replace conventional light source and has widely applied on various lightings.But, because the LED self character determines its driving power not adopt same power supply with ordinary incandescent lamp, thereby LED is damaged in order to avoid voltage fluctuation causes electric current to increase, thereby must design new power supply fully to satisfy the LED required driving requirement of working, thereby bring into play the performance of LED to greatest extent, reduce failure rate.Yet the driveability of the driving power of existing various LED lighting devices is unsatisfactory, has influenced the use of LED lighting device.Fig. 4 is the driving power fundamental diagram of existing LED lighting device.It at first carries out voltage transformation to the voltage of input input, providing late-class circuit required voltage, and then links to each other with LED in the LED lighting device through directly passing through a current-limiting resistance behind the rectifying and wave-filtering.But this kind driving power can't be adjusted the operating current fluctuation at LED two ends in the lighting device that causes because of external voltage fluctuation, when input voltage fluctuation is big even can cause LED to damage; Secondly, this kind driving power can't be adjusted causing that owing to reasons such as temperature the operating current that flows through LED changes; In addition, the same phasic property of the voltage and current of this kind driving power is relatively poor, and power factor is very low.Therefore, existing LED lighting device exists the relatively poor and low defective of power factor of job stability.
[summary of the invention]
Technical problem to be solved by this invention is to overcome above-mentioned defective, provides a kind of good operating stability and power factor higher LED lighting device.
LED lighting device of the present invention is achieved through the following technical solutions: a kind of LED lighting device, comprise a shell, be contained in the shell LED and one with the driving power of LED electric connection, described driving power comprises:
One power input;
One rectification filtering unit that links to each other with power input;
Output unit is changed and delivered to one voltage transformation module that links to each other with rectification filtering unit, the described voltage transformation module voltage after to rectifying and wave-filtering;
One output unit that links to each other with voltage transformation module, the output of described output unit links to each other with load LED;
One switch element that is connected with voltage transformation module, described switch element are controlled the voltage transitions of described voltage transformation module according to its turn-on and turn-off;
The one PFC control unit that is connected with switch element, described PFC control unit produce a control signal and control periodically turn-on and turn-off of described switch element;
One decides current control unit with output unit with the constant voltage that the PFC control unit is connected, described constant voltage is decided current control unit and is comprised a constant voltage unit and a constant current unit, and described constant voltage unit and constant current unit are gathered the signal of output unit respectively and produced and feed back signal to the PFC control unit; Described PFC control unit is adjusted control signal according to described feedback signal, controls periodically turn-on and turn-off of described switch element, with the cycle of adjustment switch element turn-on and turn-off, thus the output of adjustment voltage transformation module.
Described constant voltage unit comprises a voltage comparator and a voltage stabilizing portion as a reference source, and described voltage stabilizing portion is voltage-stabiliser tube or voltage stabilizing chip.
Described constant current unit comprises a current comparator, and the benchmark of described current comparator is taken from the voltage stabilizing portion of described constant voltage unit.
Described PFC control unit also links to each other with the output of rectification filtering unit, and it is gathered the signal of described rectification filtering unit output and adjusts control signal according to the signal that collects.
Described PFC control unit is also gathered the signal of switch element, and adjusts control signal according to the signal that collects.
Described PFC control unit is also sampled to voltage transformation module, and adjusts control signal according to sampled signal.
Described voltage transformation module is also powered to the PFC control unit by connecting a Voltage stabilizing module.
Described constant voltage is decided current control unit and is connected by optical coupler with the PFC control unit.
Described driving power also comprises an EMI filter unit, and described EMI filter unit includes a piezo-resistance, and described switch element comprises a triode or field effect transistor.
Compared with prior art, LED lighting device of the present invention is accurately adjusted the operating voltage and the electric current of LED lighting device by a driving power is set, and improves the power factor of lighting device.In the described driving power switch element is set, voltage transformation module, constant voltage is decided current control unit and PFC control unit, utilize constant voltage to decide voltage signal and current signal that constant voltage unit in the current control unit and constant current unit are gathered output unit respectively, and generation feeds back signal to the PFC control unit, described PFC control unit is adjusted control signal according to described feedback signal, to adjust the switch element turn-on and turn-off, thereby adjust the output of voltage transformation module, realization is to the accurate adjustment of LED operating voltage and electric current, make load LED work more stable, power factor is also higher.In addition, the PFC control unit is also sampled to output, switch element, the voltage transformation module of rectification filtering unit, and according to sampled signal adjustment control signal, thereby LED operating current and raising power factor are further accurately adjusted in the output of adjustment voltage transformation module.By each feedback in the driving power LED is accurately adjusted, make the job stability of LED lighting device very good, and power factor is also higher, has better illuminating effect.
[description of drawings]
Fig. 1 is the three-dimensional structure diagram of LED lighting device of the present invention.
Fig. 2 is the driving power principle assumption diagram of LED lighting device of the present invention.
Fig. 3 is the driving power one preferred embodiment circuit diagram of LED lighting device of the present invention.
Fig. 4 is the driving power fundamental diagram of prior art LED lighting device.
[embodiment]
See also Fig. 1, LED lighting device of the present invention comprises a shell 1, be contained in the shell 1 LED2 and one with the driving power (not shown) of LED 2 electric connections.
See also Fig. 2, driving power of the present invention comprises that external power input, EMI filter unit, rectification filtering unit, voltage transformation module, output unit, switch element, constant voltage decide current control unit and PFC control unit.Wherein, the input of EMI filter unit links to each other with the external power input, be mainly used in the noise that suppresses electric network noise and self produce, eliminate electrical network to the influence of LED lighting device and LED lighting device to the influence of electrical network, improve the antijamming capability of LED lighting device and the reliability of system.The output of EMI filter unit links to each other with the input of rectification filtering unit, exports after converting direct current and filtering to behind the signal rectification that rectification filtering unit transmits the EMI filter unit.
Voltage transformation module links to each other with rectification filtering unit, switch element and output unit, it receives the signal of rectification filtering unit output, under the control of switch element, carry out voltage transitions, and the voltage after will changing outputs to output unit, export LED to by output unit again and drive its work.Voltage transformation module also links to each other with the PFC control unit, for the PFC control unit provides working power.
Switch element links to each other with PFC control unit and voltage transformation module, and it is subjected to control signal control of PFC control unit output and turn-on and turn-off periodically, and thereby the voltage transitions of control voltage transformation module.Described switch element can be triode or field effect transistor.
Constant voltage is decided current control unit and is linked to each other with the PFC control unit with output unit, and it is gathered the voltage and current signal of output unit and produce one and feeds back signal to the PFC control unit, by the PFC control unit output is accurately adjusted.Described constant voltage is decided current control unit and is comprised a constant voltage unit and a constant current unit, described constant voltage unit is gathered the voltage signal of output unit and is relatively produced a feedback signal in the back with a reference voltage, and described constant current unit is gathered the current signal of output unit and relatively produced a feedback signal in the back with a reference current.
The PFC control unit links to each other with the constant voltage constant current unit with switch element, mainly starts to control to make to use.The output of PFC control unit produces a control signal and controls periodically turn-on and turn-off of described switch element, and the feedback signal adjustment control signal that can decide current control unit according to constant voltage, to adjust the cycle of switch element turn-on and turn-off, thereby adjust the output of voltage transformation module, realize accurate adjustment the LED operating current.Owing to added constant voltage unit and constant current unit at output unit, both can adjust also and can adjust the voltage of output to the electric current of output, carry out feedback adjusting compared to simple employing constant current unit and have better adjustment effect, though under the situation that a certain parallel branch LED opens circuit, also can well realize to output accurate adjustment.In order further to strengthen accurate control to the LED lighting device, the PFC control unit is also sampled to output, switch element, the voltage transformation module of rectification filtering unit, and according to sampled signal adjustment control signal, thereby adjust the output of voltage transformation module, reach the purpose of further accurately adjusting the LED operating current and improving power factor.
See also Fig. 3, this concrete enforcement in the circuit, the EMI filter unit is made up of capacitor C 1, C2, C3, C4 and filter L1 and piezo-resistance RV1.Piezo-resistance RV1 is mainly used in the damage that protection may cause the LED lighting device when increasing because of line voltage moment.Rectification filtering unit mainly is made up of bridge rectifier and the filter capacitor C5 that four diode D1, D2, D3, D4 form.
Voltage transformation module mainly is made of high frequency transformer.High frequency transformer comprises a former limit T1, the first secondary T2 and the second secondary T3, and wherein, input 1 pin of former limit T1 links to each other with the output of rectification filtering unit B by an inductance L 2, and output 2 pin link to each other with switch element.The first secondary T2 directly connects an output unit of being made up of diode D8, capacitor C 12, C13, C14, C15, C17 and resistance R S parallel with one another, and the output of output unit is directly linked load LED by a terminals JP2, for LED provides operating current.The second secondary T3 provides working power by connecting a Voltage stabilizing module to PFC control unit IC2.Described Voltage stabilizing module is made of diode D6, D7, triode Q1, voltage-stabiliser tube Z3 and capacitor C 6.Wherein, the positive pole of diode D6 links to each other with 5 pin of the second secondary T3, receives the collector electrode of triode Q1 after the series connection of diode D6, D7 forward, is connected by a resistance R 10 between the base stage of triode Q1 and the collector electrode.Simultaneously, the base stage of triode Q1 links to each other with the negative pole of voltage-stabiliser tube Z3, and the positive pole of voltage-stabiliser tube Z3 links to each other with the positive pole of diode D3 in the rectification filtering unit by the back that links to each other with another pin 6 pin of the second secondary T3.Between the positive pole of the negative pole of diode D6 and voltage-stabiliser tube Z3, also be connected to a filter capacitor C6.The supply pin VCC of PFC control chip IC2 in the emitter of triode Q1 and the PFC control unit links to each other, and IC2 provides working power for the PFC control chip.
Described switch element mainly comprises a field effect transistor M1, the drain electrode of field effect transistor M1 links to each other with the former limit T1 of high frequency transformer, its grid links to each other with the CC port of PFC control chip IC2 by a resistance R 12, and source electrode links to each other with the positive pole of diode D3 in the rectification filtering unit with two parallel resistor R15, R16 series connection back.Be parallel with a diode D12 at resistance R 12 two ends, and the positive pole of diode D12 links to each other with the grid of field effect transistor M1.Former limit T1, the field effect transistor M1 of EMI filter unit, rectification filtering unit, high frequency transformer and resistance R 15, R16 constitute a loop.For protection field effect transistor M1, between its drain electrode and source electrode, also be connected to a voltage-stabiliser tube Z4.In order to prevent field effect transistor to be caused damage, also be parallel with a protection branch road that constitutes by diode D5, voltage-stabiliser tube Z1 at the former limit T1 of high frequency transformer because of the spike that the leakage inductance of high frequency transformer produced in the moment that field effect transistor M1 turn-offs.
Constant voltage is decided current control unit and is comprised a constant voltage unit and a constant current unit.Described constant voltage unit mainly is made up of a voltage comparator ic 5 and peripheral circuit thereof, and described peripheral circuit comprises diode D11, D9, capacitor C 16, C18, resistance R 18, R19, R20, R21 and voltage stabilizing chip IC 4.Wherein, the positive pole of diode D11 links to each other with the negative pole of diode D8 in the output unit, a branch road of its negative pole connects capacitor C 16 back ground connection, another branch road connects a resistance R 18 and is voltage comparator ic 5 power supplies, also has a branch road to pass through connection one resistance R 21 and the voltage stabilizing chip IC 4 back ground connection of series connection mutually.The negative electrode K of voltage stabilizing chip IC 4 links to each other with resistance R 21, anode A ground connection, and negative electrode K with link to each other with reference to utmost point R.The positive pole of voltage comparator ic 5 inputs links to each other with the reference utmost point R of voltage stabilizing chip IC 4.Resistance R 19, R20 are connected between the negative pole and ground of diode D8 in the output unit mutually, and draw a branch road link to each other with the negative pole of voltage comparator ic 5 inputs between resistance R 19 and R20.Link to each other with input 2 pin of optical coupler IC3 behind the output reversal connection one diode D9 of voltage comparator ic 5, another pin 1 pin of optical coupler IC3 input links to each other with the negative pole of diode D8 by a resistance R 17, and the output of optical coupler IC3 links to each other with PFC control chip IC2.Simultaneously, between the output of voltage comparator ic 5 and input cathode, also be parallel with a capacitor C 18.
Described constant current unit mainly comprises a current comparator IC6 and peripheral circuit composition thereof, and described current comparator IC6 and voltage comparator ic 5 all adopt voltage stabilizing chip IC 4 place branch roads as its a reference source, described peripheral circuit comprises resistance R 22, R23, R24, capacitor C 19, C20 and diode D10.Wherein, an end of resistance R 22 links to each other with the reference utmost point R of voltage stabilizing chip IC 4, and the other end connects the positive pole of resistance R 23 and current comparator IC6 input, the other end ground connection of resistance R 23.The negative pole of current comparator IC6 input links to each other with an end of the contiguous load of resistance R S in the output unit by a resistance R 24, and simultaneously, the negative pole of current comparator IC6 input also connects a capacitor C 20 back ground connection.Link to each other with 2 pin of optical coupler IC3 input behind the output reversal connection one diode D10 of current comparator IC6, simultaneously, also be parallel with a capacitor C 19 between the output of current comparator IC6 and the input cathode.
The PFC control unit mainly is made up of PFC control chip IC2 and peripheral circuit thereof, and described peripheral circuit comprises resistance R 1, R3, R5, R7, R9, R11, R12, R13, R14 and capacitor C 7, C8, C9, C10.Wherein, an end of resistance R 1 links to each other with the output of rectification filtering unit, and other end series resistance R3 successively links to each other with the positive pole of diode D3 in the rectification filtering unit with resistance R 9 backs, is parallel with a capacitor C 9 simultaneously at the two ends of resistance R 9.The end that resistance R 3 links to each other with resistance R 9 also links to each other with the V+ pin of PFC control chip IC2, and this pin is by the output sampling to rectification filtering unit of resistance R 1, resistance R 3 and resistance R 9 place branch roads.Resistance R 5, resistance R 7 are connected mutually, and the other end of resistance R 5 links to each other with the negative pole of diode D4 in the rectification filtering unit, the other end of resistance R 7 connects capacitor C 7 backs and links to each other with the positive pole of diode D3 in the rectification filtering unit, and this end of resistance R 7 also links to each other with the power end VCC pin of PFC control chip IC2.The VCC pin of PFC control chip IC2 also links to each other with the emitter of triode Q1.The sampling pin C pin of PFC control chip links to each other with 5 pin of the second secondary T3 of high frequency transformer, and this pin is gathered the output signal of the second secondary T3.The control signal output pin CC of PFC control chip IC2 links to each other with the grid of field effect transistor M1 by a resistance R 12, its output one-period property control signal is controlled periodically turn-on and turn-off of described field effect transistor M1, thereby reaches the purpose of control high frequency transformer C high frequency transformation.The sampling pin FB of described PFC control chip IC2 links to each other with the source electrode of field effect transistor M1, and its grounding leg GND links to each other with the positive pole of diode D3 in the rectification filtering unit, its another sampling pin B with also link to each other behind series resistance R13, the R14 successively with the positive pole of diode D3.Output pin 3 pin of optical coupler IC3 are connected between resistance R 13 and the resistance R 14; and in order to protect optical coupler IC3; between its two output pins, 3 pin and 4 pin, also be connected to a voltage-stabiliser tube Z2; wherein; the positive pole of voltage-stabiliser tube Z2 links to each other with 4 pin of optical coupler IC3, and 4 pin of optical coupler IC3 also link to each other with the negative pole of diode D7 in the Voltage stabilizing module.
The operation principle of described physical circuit is as follows: extraneous power network current is delivered to the EMI filtering unit filters through exchanging fuse F1, output to high frequency transformer after bridge rectifier rectification that filtered signal is formed via diode D1, D2, D3, D4 and capacitor C 5 filtering, form the loop through field effect transistor M1, resistance R 15, R16 and diode D3 again.The control signal that PFC control unit IC2 produces is through control signal output pin CC control field effect transistor M1 periodical high-frequency turn-on and turn-off, thereby produce a voltage signal at the first secondary T2 and deliver to the two ends of LED, for LED provides working power via the output unit of diode D8, filter capacitor C12, C13, C14, C15, C17 composition.Simultaneously, the branch road that output unit is formed through diode D11, resistance R 21 and voltage stabilizing chip IC 4 from the signal of diode D8 output forms a reference signal source at voltage-stabiliser tube IC4, and described reference signal source is added in the reference voltage of the positive input terminal of voltage comparator ic 5 as voltage comparator ic 5.Output unit is added in the negative input end of voltage comparator ic 5 from the voltage of diode D8 output after resistance R 19, R20 dividing potential drop, the voltage of described negative input end and reference voltage export the negative pole of diode D9 after relatively to.If change in voltage is when causing diode D9 conducting, electric current flow through resistance R 17, optical coupler IC3 input and diode D9 are added to feedback signal by optical coupler IC3 the B pin of PFC control chip IC2.PFC control chip IC2 is according to the control signal of the feedback signal adjustment that receives output, thereby adjusts the output of high frequency transformer by the turn-on and turn-off of control field effect transistor M1, with fast that voltage is stable.In addition, the signal at voltage stabilizing chip IC 4 two ends is added in the positive input terminal of current comparator IC6 as reference signal through resistance R 22 and resistance R 23 dividing potential drops, the electric current that flows through resistance R S is added in the negative input end of current comparator IC6 after resistance R 24, the signal of described negative input end and reference signal output to diode D10 after relatively.When the electric current that flows through resistance R S changed, it changed the output that is reflected to current comparator IC6 rapidly by current comparator IC6, causes diode D10 conducting, by optical coupler IC3 feedback signal was added to the B pin of PFC control chip IC2 equally.PFC control chip IC2 is according to the control signal of the feedback signal adjustment that receives output, thereby adjusts the output of high frequency transformer by the turn-on and turn-off of control field effect transistor M1, will flow through the current stabilization of resistance R S fast.By above-mentioned constant voltage unit and constant current unit, realized accurate adjustment to output loading LED.Owing on the basis of constant current unit, added constant voltage circuit, under the situation that a certain paths of LEDs opens circuit even the feasible accurate adjustment that still can realize output loading LED has better adjustment effect compared to single employing constant current unit.
Secondly, the V+ pin of PFC control chip IC2, C pin and FB pin are also gathered signal, the second secondary T3 of high frequency transformer and the source signal of field effect transistor M1 of rectification filtering unit output respectively, described PFC control chip IC2 adjusts control signal according to the signal that collects, and reaches the purpose of further accurately adjusting the LED operating current and improving power factor.
Because the driving power that is provided with in the LED lighting device is provided with the multiple spot feedback, can gather each feedback point signal and accurately adjust operating voltage and electric current by control unit rapidly during the work of LED lighting device according to feedback signal, the LED lighting device is always worked under the condition of setting, improve the job stability and the power factor of LED lighting device, had extraordinary illuminating effect.
More than describing is embodiments of the invention only, forgives and can understand, and under the prerequisite that does not depart from the present invention's design, all should be included within the technical conceive of the present invention simple modification of the present invention and replacement.
Claims (9)
1. LED lighting device, comprise a shell, be contained in the shell LED and one with the driving power of LED electric connection, described driving power comprises:
One power input;
One rectification filtering unit that links to each other with power input;
Output unit is changed and delivered to one voltage transformation module that links to each other with rectification filtering unit, the described voltage transformation module voltage after to rectifying and wave-filtering;
One output unit that links to each other with voltage transformation module, the output of described output unit links to each other with load LED;
One switch element that is connected with voltage transformation module, described switch element are controlled the voltage transitions of described voltage transformation module according to its turn-on and turn-off;
The one PFC control unit that is connected with switch element, described PFC control unit produce a control signal and control periodically turn-on and turn-off of described switch element;
It is characterized in that:
Described driving power also comprises:
One decides current control unit with output unit with the constant voltage that the PFC control unit is connected, described constant voltage is decided current control unit and is comprised a constant voltage unit and a constant current unit, and described constant voltage unit and constant current unit are gathered the signal of output unit respectively and produced and feed back signal to the PFC control unit; Described PFC control unit is adjusted control signal according to described feedback signal, controls periodically turn-on and turn-off of described switch element, with the cycle of adjustment switch element turn-on and turn-off, thus the output of adjustment voltage transformation module.
2. LED lighting device as claimed in claim 1 is characterized in that: described constant voltage unit comprises a voltage comparator and a voltage stabilizing portion as a reference source, and described voltage stabilizing portion is voltage-stabiliser tube or voltage stabilizing chip.
3. LED lighting device as claimed in claim 2 is characterized in that: described constant current unit comprises a current comparator, and the benchmark of described current comparator is taken from the voltage stabilizing portion of described constant voltage unit.
4. LED lighting device as claimed in claim 1 is characterized in that: described PFC control unit also links to each other with the output of rectification filtering unit, and it is gathered the signal of described rectification filtering unit output and adjusts control signal according to the signal that collects.
5. LED lighting device as claimed in claim 1 is characterized in that: described PFC control unit is also gathered the signal of switch element, and adjusts control signal according to the signal that collects.
6. LED lighting device as claimed in claim 1 is characterized in that: described PFC control unit is also sampled to voltage transformation module, and adjusts control signal according to sampled signal.
7. LED lighting device as claimed in claim 1 is characterized in that: described voltage transformation module is also powered to the PFC control unit by connecting a Voltage stabilizing module.
8. LED lighting device as claimed in claim 1 is characterized in that: described constant voltage is decided current control unit and is connected by optical coupler with the PFC control unit.
9. LED lighting device as claimed in claim 1 is characterized in that: described driving power also comprises an EMI filter unit, and described EMI filter unit includes a piezo-resistance, and described switch element comprises a triode or field effect transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100379357A CN101262722B (en) | 2007-03-08 | 2007-03-08 | LED lighting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100379357A CN101262722B (en) | 2007-03-08 | 2007-03-08 | LED lighting device |
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| Publication Number | Publication Date |
|---|---|
| CN101262722A true CN101262722A (en) | 2008-09-10 |
| CN101262722B CN101262722B (en) | 2012-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007100379357A Expired - Fee Related CN101262722B (en) | 2007-03-08 | 2007-03-08 | LED lighting device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101801135A (en) * | 2010-03-17 | 2010-08-11 | 成都爱益迪电子科技有限公司 | High-efficiency and low-harmonic LED optical projection engine driving power supply |
| CN101925222A (en) * | 2010-01-12 | 2010-12-22 | 海洋王照明科技股份有限公司 | Power output circuit for LED driving device |
| CN102014559A (en) * | 2010-11-19 | 2011-04-13 | 宁波龙源照明电器有限公司 | Light-emitting diode light source driving power supply |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100982167B1 (en) * | 2002-12-19 | 2010-09-14 | 코닌클리즈케 필립스 일렉트로닉스 엔.브이. | Leds driver |
| CN201063903Y (en) * | 2007-03-08 | 2008-05-21 | 宁波安迪光电科技有限公司 | LED lighting device |
-
2007
- 2007-03-08 CN CN2007100379357A patent/CN101262722B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101925222A (en) * | 2010-01-12 | 2010-12-22 | 海洋王照明科技股份有限公司 | Power output circuit for LED driving device |
| CN101925222B (en) * | 2010-01-12 | 2013-10-09 | 海洋王照明科技股份有限公司 | Power output circuit for LED driving device |
| CN101801135A (en) * | 2010-03-17 | 2010-08-11 | 成都爱益迪电子科技有限公司 | High-efficiency and low-harmonic LED optical projection engine driving power supply |
| CN102014559A (en) * | 2010-11-19 | 2011-04-13 | 宁波龙源照明电器有限公司 | Light-emitting diode light source driving power supply |
| CN102014559B (en) * | 2010-11-19 | 2013-09-04 | 宁波龙源照明电器有限公司 | Light-emitting diode light source driving power supply |
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| Publication number | Publication date |
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| CN101262722B (en) | 2012-05-23 |
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