CN101155448A - Illuminating device and driving method thereof - Google Patents
Illuminating device and driving method thereof Download PDFInfo
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- CN101155448A CN101155448A CNA2006101524122A CN200610152412A CN101155448A CN 101155448 A CN101155448 A CN 101155448A CN A2006101524122 A CNA2006101524122 A CN A2006101524122A CN 200610152412 A CN200610152412 A CN 200610152412A CN 101155448 A CN101155448 A CN 101155448A
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Abstract
The present invention relates to a lighting device and its driving method. The driving method separately drives a first luminous diode and a second luminous diode to light during a first period and a second period, the driving method comprises the following steps: in the first period, outputting a driving signal with a first responsibility period so as to drive the first luminous diode; and in the first period, outputting a driving signal with a second responsibility period so as to drive the first luminous diode, wherein the second responsibility period is less than the first responsibility period. The lighting device comprises: an electrical source supply circuit for outputting a voltage; a transformer with a once side and a twice side; a first lighting unit for electrical property connecting to the twice side of the transformer; a second lighting unit for electrical property connecting to the twice side of the transformer; and a transformer switch for electrical property connecting to the transformer.
Description
Technical field
The present invention relates to a kind of light-emitting device and driving method thereof, have the light-emitting device of light-emitting diode and a driving method of light-emitting device especially in regard to a kind of.
Background technology
Light-emitting diode generally is to utilize P type semiconductor and N type semiconductor to be made, owing to utilize the light-emitting diode of semiconductor element made, has long, advantage such as the speed of lighting a lamp is fast, photoelectric conversion efficiency is high, volume is little and spectrum is narrow of life-span, recently be subjected to suitable attention, also therefore quickened the growth of led technology.
Seeing also shown in Figure 1ly, is a schematic diagram that shows known light-emitting device.One light-emitting device 1 comprises control circuit 19 between a power supply circuit 11, a transformer 12, an electric capacity of voltage regulation 13, a resonator filter 14, a clamper 15, a plurality of luminescence unit 16～18 and a light emission period, each luminescence unit 16～18 comprises three light-emitting diodes 161～181 and a switch 162～182 respectively, and power supply circuit 11 is electrically connected to transformer 12 so that a voltage V to be provided
IN, transformer 12 changing voltage V
INTo export a voltage V
OUT, electric capacity of voltage regulation 13 is electrically connected to transformer 12 with burning voltage V
OUT, resonator filter 14 is electrically connected to transformer 12 and to voltage V
OUTFiltering is used and is eliminated the high frequency surging, and each luminescence unit 16～18 sees through filter 14 and is electrically connected to transformer 12, voltage V
OUTThe light-emitting diode 161～181 that drives each luminescence unit 16～18 is luminous.
Light-emitting diode 161,171,181 is set at and sends blueness, redness, green light, yet, because the nominal drive voltage of each luminescence unit 161,171,181 is different, voltage V for example
OUTMust reduce to use from driven for emitting lights unit 161 changing driven for emitting lights unit 171 into, when transition, clamper 15 is to avoid still having too high residual voltage V in order to consume too much power, to use
OUTDriven for emitting lights unit 171 and cause the emission wavelength skew of luminescence unit 171 or influence its useful life.In addition, under this framework, resonator filter 14 also can cause extra cost with clamper 15.
Therefore how to provide a kind of light-emitting device and driving method thereof, make it reduce residual voltage, real one of the current important topic that belongs to.
This shows that above-mentioned existing light-emitting device and driving method thereof obviously still have inconvenience and defective, and demand urgently further being improved in structure and use.In order to solve the problem that light-emitting device and driving method thereof exist, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, and this obviously is the problem that the anxious desire of relevant dealer solves.
Because the defective that above-mentioned existing light-emitting device and driving method thereof exist, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, and the utilization of cooperation scientific principle, actively studied innovation, in the hope of founding a kind of new light-emitting device and driving method thereof, can improve general existing light-emitting device and driving method thereof, make it have more practicality.Through constantly research, design, and after studying sample and improvement repeatedly, create the present invention who has practical value finally.
Summary of the invention
The objective of the invention is to, overcome the defective that existing light-emitting device and driving method thereof exist, and a kind of new light-emitting device and driving method thereof are provided, technical problem to be solved is to make it reduce residual voltage, thereby is suitable for practicality more.
The object of the invention to solve the technical problems realizes by the following technical solutions.The driving method of a kind of light-emitting device that proposes according to the present invention, elder generation's rear drive one first light-emitting diode and one second light-emitting diode are respectively at luminous with a second phase between a first phase, this driving method may further comprise the steps: between this first phase, output has one of one first responsibility cycle and drives signal, to drive this first light-emitting diode; And between this first phase, this driving signal that output has one second responsibility cycle, to drive this first light-emitting diode, wherein this second responsibility cycle is less than this first responsibility cycle.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The driving method of aforesaid light-emitting device, it more comprises: between this first phase, this driving signal that output has one the 3rd responsibility cycle is to drive this first light-emitting diode.
The driving method of aforesaid light-emitting device, it more comprises: in this second phase, this driving signal that output has one the 4th responsibility cycle is to drive this second light-emitting diode.
The driving method of aforesaid light-emitting device, the average voltage level when wherein this driving signal is between this first phase is higher or lower than the average voltage level when this second phase.
The driving method of aforesaid light-emitting device, wherein the average voltage level of this driving signal when having this first responsibility cycle is higher than the average voltage level of this driving signal when having this second responsibility cycle.
The driving method of aforesaid light-emitting device, the magnitude of voltage of this driving signal in wherein between this first phase are to increase gradually or reduce gradually.
The object of the invention to solve the technical problems also adopts following technical scheme to realize.According to a kind of light-emitting device that the present invention proposes, it comprises: a power supply circuit, export a voltage; One transformer has a primary side and a secondary side, and this primary side is to be electrically connected to this power supply circuit, to change this voltage and to drive signal by this secondary side output one; One first luminescence unit is electrically connected to this secondary side of this transformer, and is driven and luminous between a first phase by this driving signal; One second luminescence unit is electrically connected to this secondary side of this transformer, and is driven and luminous in a second phase by this driving signal, and wherein this first luminescence unit is in parallel with this second luminescence unit; An and transformer switch, be electrically connected to this transformer, in between this first phase, successively receive a PWM controlling signal with one first responsibility cycle and one second responsibility cycle, to control this driving signal that this transformer output has this first responsibility cycle and this second responsibility cycle, wherein this second responsibility cycle is less than this first responsibility cycle.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid light-emitting device, wherein said switch between this first phase in, receive this PWM controlling signal, to control this driving signal that this transformer output has the 3rd responsibility cycle with one the 3rd responsibility cycle.
Aforesaid light-emitting device, wherein said transformer switch receive this PWM controlling signal with one the 4th responsibility cycle in this second phase, to control this driving signal that this transformer output has the 4th responsibility cycle.
Aforesaid light-emitting device, wherein said first luminescence unit comprises: one first light-emitting diode is electrically connected to this secondary side of this transformer; And one first switch, be electrically connected to this first light-emitting diode, and conducting drives this first light-emitting diode to control this driving signal between this first phase.
Aforesaid light-emitting device, wherein said second luminescence unit comprises: one second light-emitting diode is electrically connected to this secondary side of this transformer; And a second switch, be electrically connected to this second light-emitting diode, and drive this second light-emitting diode to control this driving signal in this second phase conducting.
Aforesaid light-emitting device, the nominal drive voltage of wherein said first light-emitting diode is higher than the nominal drive voltage of this second light-emitting diode.
Aforesaid light-emitting device, the average voltage level when wherein said driving signal has this second responsibility cycle is between the nominal drive voltage of the nominal drive voltage of this first light-emitting diode and this second light-emitting diode.
Aforesaid light-emitting device, the wherein said driving signal average voltage level between this first phase the time is higher or lower than the average voltage level when this second phase.
Aforesaid light-emitting device, the average voltage level when wherein said driving signal has this first responsibility cycle is higher than the average voltage level when having this second responsibility cycle.
Aforesaid light-emitting device, wherein said first luminescence unit comprises first light-emitting diode of a plurality of series connection, or this second luminescence unit comprises second light-emitting diode of a plurality of series connection.
By technique scheme, light-emitting device of the present invention and driving method thereof have following advantage at least:
In light-emitting device of the present invention and driving method thereof, in between the first phase, driving signal is successively to have first responsibility cycle and second responsibility cycle, and second responsibility cycle is less than first responsibility cycle, make between the first phase with second phase transition before, the average voltage that drives signal can suitably reduce, thereby can avoid still having too high voltage to drive second light-emitting diode in the second phase.
In sum, light-emitting device of the present invention and driving method thereof, it can effectively reduce residual voltage, and in like product, do not see have similar structural design to publish or use and really genus innovation, no matter it all has bigger improvement on product structure or function, have large improvement technically, and produced handy and practical effect, and more existing light-emitting device and driving method thereof have the multinomial effect of enhancement, thereby be suitable for practicality more, and have the extensive value of industry, really be a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is for showing a schematic diagram of known light-emitting device.
Fig. 2 is for showing the schematic diagram according to the light-emitting device of preferred embodiment of the present invention.
Fig. 3 is for showing according to a PWM controlling signal in the light-emitting device of preferred embodiment of the present invention and an oscillogram that drives signal.
Fig. 4 is for showing according to an oscillogram that drives signal in the light-emitting device of preferred embodiment of the present invention between the first phase.
Fig. 5 is for showing according to PWM controlling signal in the light-emitting device of preferred embodiment of the present invention and another oscillogram that drives signal.
Fig. 6 is for showing another schematic diagram according to the light-emitting device of preferred embodiment of the present invention.
1: light-emitting device 11: power supply circuit
12: transformer 13: electric capacity of voltage regulation
14: resonator filter 15: clamper
16,17,18: luminescence unit 161,171,181: light-emitting diode
162,172,182: switch 19: control circuit between light emission period
2: 21: the first luminescence units of light-emitting device
211 first light-emitting diodes 212: switch
22: the second luminescence unit 221 second light-emitting diodes
222: 23: the three luminescence units of switch
231 the 3rd light-emitting diodes 232: switch
24: power supply circuit 25: transformer
26: transformer switch 27:PWM control circuit
28: control circuit 291 between light emission period: diode
292: capacitor CNT:PWM controlling signal
S: drive signal V, V
IN, V
OUT: voltage
V
11, V
12, V
13: average voltage level V
21, V
22: average voltage level
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, to light-emitting device and its embodiment of driving method, structure, feature and the effect thereof that foundation the present invention proposes, describe in detail as after.
Seeing also shown in Figure 2ly, is a schematic diagram that shows according to the light-emitting device of preferred embodiment of the present invention.One light-emitting device 2 comprises control circuit 28, a diode 291 and a capacitor 292 between one first luminescence unit 21, one second luminescence unit 22, one the 3rd luminescence unit 23, a power supply circuit 24, a transformer 25, a transformer switch 26, a pwm control circuit 27, a light emission period.
Seeing also shown in Figure 3ly, is to show according to a PWM controlling signal in the light-emitting device of preferred embodiment of the present invention and an oscillogram that drives signal.In between the first phase, PWM controlling signal CNT successively has one first responsibility cycle and one second responsibility cycle, second responsibility cycle is less than first responsibility cycle, transformer switch 26 is that whether output voltage V is to transformer 25 for control power supply circuit 24, and it is corresponding with PWM controlling signal CNT to use the driving signal S that control transformer 25 exported, and drives signal S and also has first responsibility cycle and second responsibility cycle equally.
Please consult Fig. 2 again, in the present embodiment, capacitor 292 is in parallel with the 3rd luminescence unit 23 with first luminescence unit 21, second luminescence unit 22, it is the voltage that is used for stabilized driving signal S, first luminescence unit 21, second luminescence unit 22 and the 3rd luminescence unit 23 are to see through diode 291 to be electrically connected to transformer 25, and diode 291 is to prevent that reverse current from driving these luminescence units.
First light-emitting diode 211, second light-emitting diode 221 and the 3rd light-emitting diode 231 are respectively blue light diode, red diodes and green diode, the nominal drive voltage of first light-emitting diode 211 is higher than the nominal drive voltage of second light-emitting diode 221, and the nominal drive voltage of second light-emitting diode 221 is higher than the nominal drive voltage of the 3rd light-emitting diode 231.
Referring again to Fig. 3, in present embodiment, with in the first drive blue LED, drive red light emitting diodes in the second phase, driving green LED between the third phase is example, in order to drive the light-emitting diode of variant nominal drive voltage smoothly, power supply circuit 24 is between the first phase, between the second phase and the third phase time, and the value of the voltage V that it provided is respectively V
1, V
2And V
3, V wherein
1Greater than V
2, V
2Greater than V
3, therefore, transformer 25 in each during each corresponding voltage V of conversion, make to drive the average voltage level V of signal S between the first phase time
1Be higher than the average voltage level V when the second phase
2, and the average voltage level V when the second phase
2Average voltage level V when being higher than between the third phase
3
In addition, if in the first drive green LED, drive blue LED, between the third phase, drive red light emitting diodes, then drive the average voltage level V of signal S between the first phase time in the second phase
1Be lower than the average voltage level V when the second phase
2
In addition, between the first phase in, drive signal S and successively have first responsibility cycle and second responsibility cycle respectively, wherein second responsibility cycle is less than first responsibility cycle, the average voltage level V when driving signal S has first responsibility cycle
11Be higher than the average voltage level V when having second responsibility cycle
12, and average voltage level V
12Between the nominal drive voltage of the nominal drive voltage of first light-emitting diode 21 and second light-emitting diode 22, thus, between the first phase with second phase transition before, the average voltage that drives signal S will suitably reduce, thereby can avoid still having too high voltage to drive second light-emitting diode 22 in the second phase.
In addition, transformer switch 26 between the first phase in, receive PWM controlling signal CNT with one the 3rd responsibility cycle, use the driving signal S that control transformer 25 outputs have the 3rd responsibility cycle.PWM controlling signal CNT successively has the 3rd responsibility cycle, first responsibility cycle and second responsibility cycle between the first phase, and wherein the 3rd responsibility cycle is less than first responsibility cycle.Drive the average voltage level V that signal S has the 3rd responsibility cycle
13Be lower than the average voltage level V when having first responsibility cycle
11
In addition, see also shown in Figure 4, between the first phase in, switch 212 conducting gradually, the magnitude of voltage that make to drive signal S increases gradually.Switch 212 cuts out gradually, makes the magnitude of voltage that drives signal S reduce gradually.In what this paid special attention to be, its responsibility cycle be from the 3rd responsibility cycle by little greatly first responsibility cycle that becomes gradually, be second responsibility cycle from first responsibility cycle by diminishing greatly gradually again.
Fig. 5 is for showing according to PWM controlling signal in the light-emitting device of preferred embodiment of the present invention and another oscillogram that drives signal.As shown in Figure 5, transformer switch 26 receives the PWM controlling signal CNT with one the 4th responsibility cycle in the second phase, exports the driving signal S with the 4th responsibility cycle with control transformer 25.
Please consult Fig. 5 again, moreover, in the second phase, transformer switch 26 more receives the PWM controlling signal CNT with one the 5th responsibility cycle, the driving signal S that has the 5th responsibility cycle with control transformer 25 output, wherein the 5th responsibility cycle is less than the 4th responsibility cycle, thereby in the second phase, drive signal S and successively have the 4th responsibility cycle and the 5th responsibility cycle respectively, the average voltage level V when driving signal S has the 4th responsibility cycle
21Be higher than the average voltage level V when having the 5th responsibility cycle
22, and average voltage level V
22Between the nominal drive voltage of the nominal drive voltage of second light-emitting diode 22 and the 3rd light-emitting diode 23, thus, between the second phase and the third phase before the transition, the average voltage that drives signal S will suitably reduce, thereby can avoid still having between the third phase too high voltage to drive the 3rd light-emitting diode 23.
Seeing also shown in Figure 6ly, is another schematic diagram that shows according to the light-emitting device 2 of preferred embodiment of the present invention.With different first light-emitting diodes 211 that comprise a plurality of series connection in each first luminescence unit 21 that are in shown in Figure 2, second luminescence unit 22 comprises that second light-emitting diode, 221, the three luminescence units 23 of a plurality of series connection comprise second light-emitting diode 231 of a plurality of series connection.And light-emitting device 2 comprises a plurality of first luminescence units 21, second luminescence unit 22 and the 3rd luminescence unit 23, and these luminescence units are arranged in a light emitting array.
In sum, because of complying with in light-emitting device of the present invention and the driving method thereof, in between the first phase, drive signal and successively have first responsibility cycle and second responsibility cycle, and second responsibility cycle is less than first responsibility cycle, make between the first phase with second phase transition before, the average voltage that drives signal can suitably reduce, thereby can avoid still having too high voltage to drive second light-emitting diode in the second phase.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (16)
1. a driving method of sending out the dress electro-optical device is characterized in that first rear drive one first light-emitting diode and one second light-emitting diode are respectively at luminous with a second phase between a first phase, and this driving method may further comprise the steps:
In between this first phase, output has one of one first responsibility cycle and drives signal, to drive this first light-emitting diode; And
In between this first phase, this driving signal that output has one second responsibility cycle, to drive this first light-emitting diode, wherein this second responsibility cycle is less than this first responsibility cycle.
2. driving method as claimed in claim 1 is characterized in that more comprising:
In between this first phase, this driving signal that output has one the 3rd responsibility cycle is to drive this first light-emitting diode.
3. driving method as claimed in claim 1 is characterized in that more comprising:
In this second phase, this driving signal that output has one the 4th responsibility cycle is to drive this second light-emitting diode.
4. driving method as claimed in claim 1 is characterized in that average voltage level when wherein this driving signal is between this first phase is higher or lower than the average voltage level when this second phase.
5. driving method as claimed in claim 1 is characterized in that the average voltage level of this driving signal when having this first responsibility cycle wherein is higher than the average voltage level of this driving signal when having this second responsibility cycle.
6. driving method as claimed in claim 1, the magnitude of voltage of this driving signal in it is characterized in that wherein between this first phase are to increase gradually or reduce gradually.
7. light-emitting device is characterized in that comprising:
One power supply circuit is exported a voltage;
One transformer has a primary side and a secondary side, and this primary side is to be electrically connected to this power supply circuit, to change this voltage and to drive signal by this secondary side output one;
One first luminescence unit is electrically connected to this secondary side of this transformer, and is driven and luminous between a first phase by this driving signal;
One second luminescence unit is electrically connected to this secondary side of this transformer, and is driven and luminous in a second phase by this driving signal, and wherein this first luminescence unit is in parallel with this second luminescence unit; And
One transformer switch, be electrically connected to this transformer, in between this first phase, successively receive a PWM controlling signal with one first responsibility cycle and one second responsibility cycle, to control this driving signal that this transformer output has this first responsibility cycle and this second responsibility cycle, wherein this second responsibility cycle is less than this first responsibility cycle.
8. light-emitting device as claimed in claim 7, it is characterized in that wherein this switch is between this first phase in, receive this PWM controlling signal, to control this driving signal that this transformer output has the 3rd responsibility cycle with one the 3rd responsibility cycle.
9. light-emitting device as claimed in claim 7 is characterized in that wherein this transformer switch receives this PWM controlling signal with one the 4th responsibility cycle in this second phase, to control this driving signal that this transformer output has the 4th responsibility cycle.
10. light-emitting device as claimed in claim 7 is characterized in that wherein this first luminescence unit comprises:
One first light-emitting diode is electrically connected to this secondary side of this transformer; And
One first switch is electrically connected to this first light-emitting diode, and conducting drives this first light-emitting diode to control this driving signal between this first phase.
11. light-emitting device as claimed in claim 10 is characterized in that wherein this second luminescence unit comprises:
One second light-emitting diode is electrically connected to this secondary side of this transformer; And
One second switch is electrically connected to this second light-emitting diode, and drives this second light-emitting diode in this second phase conducting to control this driving signal.
12. light-emitting device as claimed in claim 11 is characterized in that the nominal drive voltage of this first light-emitting diode wherein is higher than the nominal drive voltage of this second light-emitting diode.
13. light-emitting device as claimed in claim 11 is characterized in that average voltage level when wherein this driving signal has this second responsibility cycle is between the nominal drive voltage of the nominal drive voltage of this first light-emitting diode and this second light-emitting diode.
14. light-emitting device as claimed in claim 7 is characterized in that average voltage level when wherein this driving signal is between this first phase is higher or lower than the average voltage level when this second phase.
15. light-emitting device as claimed in claim 7 is characterized in that average voltage level when wherein this driving signal has this first responsibility cycle is higher than the average voltage level when having this second responsibility cycle.
16. light-emitting device as claimed in claim 7 it is characterized in that this first luminescence unit wherein comprises first light-emitting diode of a plurality of series connection, or this second luminescence unit comprises second light-emitting diode of a plurality of series connection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610152412A CN100579323C (en) | 2006-09-29 | 2006-09-29 | Illuminating device and driving method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610152412A CN100579323C (en) | 2006-09-29 | 2006-09-29 | Illuminating device and driving method thereof |
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| CN101155448A true CN101155448A (en) | 2008-04-02 |
| CN100579323C CN100579323C (en) | 2010-01-06 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102821507A (en) * | 2011-06-08 | 2012-12-12 | 东莞柏泽光电科技有限公司 | Lighting device and method thereof |
| CN103002629A (en) * | 2011-09-19 | 2013-03-27 | 东莞柏泽光电科技有限公司 | Illuminating apparatus with power detection function and method for illuminating apparatus |
| CN103037563A (en) * | 2011-09-28 | 2013-04-10 | 东莞柏泽光电科技有限公司 | Lighting device and lighting method capable of reducing stroboflash |
| CN103152911A (en) * | 2013-01-21 | 2013-06-12 | 光远科技股份有限公司 | Control circuit of light emitting diode with self-adaptive adjustment |
| CN101730329B (en) * | 2008-10-10 | 2013-08-21 | 华映视讯（吴江）有限公司 | Back light module control system and control method thereof |
| CN104040862A (en) * | 2011-11-11 | 2014-09-10 | 密克罗奇普技术公司 | Method And System To Dynamically Position A Switch Mode Power Supply Output Voltage |
| TWI478622B (en) * | 2012-12-27 | 2015-03-21 | Dynascan Technology Corp | Led control circuit with self adaptive regulation |
| US9882497B2 (en) | 2012-09-28 | 2018-01-30 | Microchip Technology Incorporated | Soft switching synchronous quasi resonant converter |
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2006
- 2006-09-29 CN CN200610152412A patent/CN100579323C/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101730329B (en) * | 2008-10-10 | 2013-08-21 | 华映视讯（吴江）有限公司 | Back light module control system and control method thereof |
| CN102821507A (en) * | 2011-06-08 | 2012-12-12 | 东莞柏泽光电科技有限公司 | Lighting device and method thereof |
| CN103002629A (en) * | 2011-09-19 | 2013-03-27 | 东莞柏泽光电科技有限公司 | Illuminating apparatus with power detection function and method for illuminating apparatus |
| CN103037563A (en) * | 2011-09-28 | 2013-04-10 | 东莞柏泽光电科技有限公司 | Lighting device and lighting method capable of reducing stroboflash |
| CN104040862A (en) * | 2011-11-11 | 2014-09-10 | 密克罗奇普技术公司 | Method And System To Dynamically Position A Switch Mode Power Supply Output Voltage |
| US9660535B2 (en) | 2011-11-11 | 2017-05-23 | Microchip Technology Incorporated | Method and system to dynamically position a switch mode power supply output voltage |
| US9882497B2 (en) | 2012-09-28 | 2018-01-30 | Microchip Technology Incorporated | Soft switching synchronous quasi resonant converter |
| TWI478622B (en) * | 2012-12-27 | 2015-03-21 | Dynascan Technology Corp | Led control circuit with self adaptive regulation |
| CN103152911A (en) * | 2013-01-21 | 2013-06-12 | 光远科技股份有限公司 | Control circuit of light emitting diode with self-adaptive adjustment |
| CN103152911B (en) * | 2013-01-21 | 2015-02-18 | 光远科技股份有限公司 | Control circuit of light emitting diode with self-adaptive adjustment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100579323C (en) | 2010-01-06 |
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