CN101262722B - LED lighting device - Google Patents
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- CN101262722B CN101262722B CN2007100379357A CN200710037935A CN101262722B CN 101262722 B CN101262722 B CN 101262722B CN 2007100379357 A CN2007100379357 A CN 2007100379357A CN 200710037935 A CN200710037935 A CN 200710037935A CN 101262722 B CN101262722 B CN 101262722B
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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 begun to replace conventional light source at present and on various lightings, has widely applied.But; Because its driving power of LED self character decision can 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 satisfying the LED required driving requirement of working, thus 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 exist job stability relatively poor with the low defective of power factor.
[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 realized through following technical scheme: 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, said 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 said 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 said output unit links to each other with load LED;
One switch element that is connected with voltage transformation module, said switch element is according to its conducting and the voltage transitions of turn-offing the said voltage transformation module of control;
The one PFC control unit that is connected with switch element, said PFC control unit produce a control signal and control said switch element periodically conducting and shutoff;
One decides current control unit with output unit with the constant voltage that the PFC control unit is connected; Said constant voltage is decided current control unit and is comprised a constant voltage unit and a constant current unit, and said 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; Said PFC control unit is controlled said switch element periodically conducting and shutoff according to said feedback signal adjustment control signal, with the cycle of adjustment switch element conducting and shutoff, thus the output of adjustment voltage transformation module.
Said constant voltage unit comprises a voltage comparator and a voltage stabilizing portion as a reference source, and said voltage stabilizing portion is voltage-stabiliser tube or voltage stabilizing chip.
Said constant current unit comprises a current comparator, and the benchmark of said current comparator is taken from the voltage stabilizing portion of said constant voltage unit.
Said PFC control unit also links to each other with the output of rectification filtering unit, and it is gathered the signal of said rectification filtering unit output and adjusts control signal according to the signal that collects.
Said PFC control unit is also gathered the signal of switch element, and according to the signal adjustment control signal that collects.
Said PFC control unit is also sampled to voltage transformation module, and according to sampled signal adjustment control signal.
Said voltage transformation module is also supplied power to the PFC control unit through connecting a Voltage stabilizing module.
Said constant voltage is decided current control unit and is connected through optical coupler with the PFC control unit.
Said driving power also comprises an EMI filter unit, and said EMI filter unit includes a piezo-resistance, and said switch element comprises a triode or FET.
Compared with prior art, LED lighting device of the present invention comes the accurately operating voltage and the electric current of adjustment LED lighting device through a driving power is set, and improves the power factor of lighting device.Switch element, voltage transformation module, constant voltage are set in the said driving power decide current control unit and PFC control unit; Utilize constant voltage to decide voltage signal and current signal that constant voltage unit and constant current unit in the current control unit are gathered output unit respectively; And produce and to feed back signal to the PFC control unit, said PFC control unit is according to said feedback signal adjustment control signal, with adjustment switch element conducting and shutoff; Thereby the output of adjustment voltage transformation module; Realization makes load LED work more stable to the accurate adjustment of LED operating voltage and electric current, and 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 the output of adjustment voltage transformation module is further accurately adjusted the LED operating current and is improved power factor.Each feedback through in the driving power is accurately adjusted LED, 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 LED2 electric connection.
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 receives control signal control and the periodically conducting and the shutoff of PFC control unit output, and thereby the voltage transitions of control voltage transformation module.Said switch element can be triode or FET.
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, through the PFC control unit output is accurately adjusted.Said constant voltage is decided current control unit and is comprised a constant voltage unit and a constant current unit; Said 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 said 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, and main control is used.The output of PFC control unit produces a control signal and controls said switch element periodically conducting and shutoff; And the feedback signal adjustment control signal that can decide current control unit according to constant voltage; With the cycle of adjustment switch element conducting and shutoff; Thereby the output of adjustment voltage transformation module realizes the accurate adjustment to 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 adjustment compared to simple employing constant current unit and have better adjustment effect, even under the situation that a certain parallel branch LED opens circuit, also can well realize accurate adjustment output.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 the output of adjustment voltage transformation module reaches further accurately adjustment LED operating current and the purpose that improves power factor.
Please consult Fig. 3 in the lump, in this practical implementation 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 possibly 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 up 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 through an inductance L 2, and output 2 pin link to each other with switch element.The first secondary T2 directly connects the output unit be 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 through a terminals JP2, for LED provides operating current.The second secondary T3 provides working power through connecting a Voltage stabilizing module to PFC control unit IC2.Said Voltage stabilizing module is made up 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 through 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 through 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.
Said switch element mainly comprises a FET M1; The drain electrode of FET 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 through 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 FET M1.EMI filter unit, rectification filtering unit, former limit T1, FET M1 and the resistance R 15 of high frequency transformer, R16 constitute a loop.For protection FET M1, between its drain electrode and source electrode, also be connected to a voltage-stabiliser tube Z4.In order to prevent FET to be caused damage, also be parallel with the 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 FET M1 turn-offs.
Constant voltage is decided current control unit and is comprised a constant voltage unit and a constant current unit.Said constant voltage unit mainly is made up of a voltage comparator ic 5 and peripheral circuit thereof, and said 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 supplies power for voltage comparator ic 5, the resistance R 21 and voltage stabilizing chip IC 4 back ground connection that also have a branch road to connect each other through connection one.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 each other, and between resistance R 19 and R20, draw a branch road and link to each other with the negative pole of voltage comparator ic 5 inputs.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 through 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.
Said constant current unit mainly comprises a current comparator IC6 and peripheral circuit composition thereof; And said current comparator IC6 and voltage comparator ic 5 all adopt voltage stabilizing chip IC 4 place branch roads as its a reference source; Said 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 through 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 said 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 through 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 each other; 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 FET M1 through a resistance R 12; Its output one-period property control signal is controlled said FET M1 periodically conducting and shutoff, thereby reaches the purpose of control high frequency transformer C high frequency transformation.The sampling pin FB of said PFC control chip IC2 links to each other with the source electrode of FET 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 said physical circuit is following: 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 FET 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 FET M1 periodical high-frequency conducting and shutoff; 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 said 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 said 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 through optical coupler IC3 the B pin of PFC control chip IC2.PFC control chip IC2 adjusts the control signal of output according to the feedback signal that receives, thereby passes through the conducting of control FET M1 and the output of shutoff adjustment high frequency transformer, fast voltage is stablized.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 said 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 through current comparator IC6, causes diode D10 conducting, through optical coupler IC3 feedback signal was added to the B pin of PFC control chip IC2 equally.PFC control chip IC2 adjusts the control signal of output according to the feedback signal that receives, thereby passes through the conducting of control FET M1 and the output of shutoff adjustment high frequency transformer, will flow through the current stabilization of resistance R S fast.Through 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,, compared to single employing constant current unit, has better adjustment effect even make and under the situation that a certain paths of LEDs opens circuit, still can realize accurate adjustment to output loading LED.
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 FET M1 of rectification filtering unit output respectively; Said PFC control chip IC2 reaches further accurately adjustment LED operating current and the purpose that improves power factor according to the signal adjustment control signal that collects.
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 through 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 describe and be merely embodiments of the invention, forgive and to understand, 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 (8)
1. LED lighting device, comprise a shell, be contained in the shell LED and one with the driving power of LED electric connection, said 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 said 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 said output unit links to each other with load LED;
One switch element that is connected with voltage transformation module, said switch element is according to its conducting and the voltage transitions of turn-offing the said voltage transformation module of control;
The one PFC control unit that is connected with switch element, said PFC control unit produce a control signal and control said switch element periodically conducting and shutoff;
One decides current control unit with output unit with the constant voltage that the PFC control unit is connected; Said constant voltage is decided current control unit and is comprised a constant voltage unit and a constant current unit, and said 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; Said constant voltage is decided current control unit and is connected through optical coupler with the PFC control unit; Said PFC control unit is controlled said switch element periodically conducting and shutoff according to said feedback signal adjustment control signal, with the cycle of adjustment switch element conducting and shutoff, thus the output of adjustment voltage transformation module;
It is characterized in that:
Said voltage transformation module mainly is made up of high frequency transformer, and this high frequency transformer comprises a former limit T1, the first secondary T2 and the second secondary T3; Said PFC control unit mainly is made up of PFC control chip IC2 and peripheral circuit thereof; Said switch element mainly comprises a FET M1; The drain electrode of FET 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 through 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; The V+ pin of said PFC control chip IC2, sampling pin C pin and sampling pin FB pin are also gathered signal, the second secondary T3 of high frequency transformer and the source signal of FET M1 of rectification filtering unit output respectively, and said PFC control chip IC2 is according to the signal adjustment control signal that collects.
2. LED lighting device as claimed in claim 1 is characterized in that: said constant voltage unit comprises a voltage comparator and a voltage stabilizing portion as a reference source, and said voltage stabilizing portion is voltage-stabiliser tube or voltage stabilizing chip.
3. LED lighting device as claimed in claim 2 is characterized in that: said constant current unit comprises a current comparator, and the benchmark of said current comparator is taken from the voltage stabilizing portion of said constant voltage unit.
4. LED lighting device as claimed in claim 1 is characterized in that: said PFC control unit also links to each other with the output of rectification filtering unit, and it is gathered the signal of said 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: said PFC control unit is also gathered the signal of switch element, and according to the signal adjustment control signal that collects.
6. LED lighting device as claimed in claim 1 is characterized in that: said PFC control unit is also sampled to voltage transformation module, and according to sampled signal adjustment control signal.
7. LED lighting device as claimed in claim 1 is characterized in that: said voltage transformation module is also supplied power to the PFC control unit through connecting a Voltage stabilizing module.
8. LED lighting device as claimed in claim 1 is characterized in that: said driving power also comprises an EMI filter unit, and said EMI filter unit includes a piezo-resistance, and said switch element comprises a triode or FET.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100379357A CN101262722B (en) | 2007-03-08 | 2007-03-08 | LED lighting device |
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| 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 |
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| CN101262722A CN101262722A (en) | 2008-09-10 |
| CN101262722B true CN101262722B (en) | 2012-05-23 |
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| CN2007100379357A Expired - Fee Related CN101262722B (en) | 2007-03-08 | 2007-03-08 | LED lighting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1745603A (en) * | 2002-12-19 | 2006-03-08 | 皇家飞利浦电子股份有限公司 | LESs driver |
| CN201063903Y (en) * | 2007-03-08 | 2008-05-21 | 宁波安迪光电科技有限公司 | LED lighting device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1745603A (en) * | 2002-12-19 | 2006-03-08 | 皇家飞利浦电子股份有限公司 | LESs driver |
| CN201063903Y (en) * | 2007-03-08 | 2008-05-21 | 宁波安迪光电科技有限公司 | LED lighting device |
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