CN102984851A - Light-emitting diode (LED) pulsation driving frequency improving circuit - Google Patents
Light-emitting diode (LED) pulsation driving frequency improving circuit Download PDFInfo
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- CN102984851A CN102984851A CN2012103722975A CN201210372297A CN102984851A CN 102984851 A CN102984851 A CN 102984851A CN 2012103722975 A CN2012103722975 A CN 2012103722975A CN 201210372297 A CN201210372297 A CN 201210372297A CN 102984851 A CN102984851 A CN 102984851A
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Abstract
A light-emitting diode (LED) pulsation driving frequency improving circuit comprises a bridge rectifier, a first switch module with voltage detecting and current limiting functions, a second switch module with voltage detecting and current limiting functions, a switch module with a voltage detecting function, a one-way switch, a first LED lamp group and a second LED lamp group. A positive pole of the bridge rectifier is respectively connected with the first switch module with voltage detecting and current limiting functions and the second switch module with voltage detecting and current limiting functions and is further connected with the switch module with the voltage detecting function, and a negative pole of the bridge rectifier is grounded. The LED pulsation driving frequency improving circuit can enable lighting frequency to be improved to 400Hz or higher than 400Hz.
Description
[technical field]
The invention belongs to the lighting apparatus field, be specifically related to a kind of LED pulsation driving frequency and promote circuit.
[background technology]
Present LED driving power adopts the constant current direct current to drive substantially take Switching Power Supply as main.But it is constantly progressive to exchange recently Driving technique, significantly reduces the driving power cost.Exchanging in the driving more is after AC rectification is become pulsating direct current LED to be carried out current drives, the problem of doing like this is that the luminous frequency of LED is 100/120Hz, although human eye can't be felt flicker, the rolling of the picture filaments of sun and flicker can appear in picture pick-up device when using.
As shown in Figure 1, be that power circuit is driven in the interchange of prior art.AC is that 220V exchanges among Fig. 1, the pulsating voltage Vin+ of output 100HZ behind bridge rectifier, and negative pole is Vin-.The input of Vin+ and flow restricter CL20 is connected to the C point, and link to each other with the threshold circuit input C1 ~ C35 of led module, the C point simultaneously in the control end base stage of the first resistance R 1 ~ R35 of each module and first switch Q1-1 ~ Q1-35 of each module and each module the input collector electrode of second switch Q2-1 ~ Q2-35 link to each other; The input of LED group links to each other in the input collector electrode of first switch Q1-1 ~ Q1-35 and each module, and the output emitter of first switch Q1-1 ~ Q1-35 links to each other with the output that LED in the output emitter of second switch Q2-1 ~ Q2-35 and each module organizes; The LED group input of Ni group links to each other with the LED output of Ni-1 group, and the LED group output of Ni group links to each other with the LED input of Ni+1 group, and so each led module is connected to each other; The C point breaks with the control of the second switch Q2-1 ~ Q2-35 of each led module and is connected to respectively voltage stabilizing didoe ZD1 ~ ZD35 of the second resistance R 2-1 ~ R2-35 that connected between the base stage; The output of the LED of last led module links to each other with Vin-.Among the figure in each led module the number of LED be 3, the about 9V of accumulative total pressure drop, consider the about 2V of minimum operating voltage of galvanostat, so voltage stabilizing didoe ZD1 ~ ZD35 selects the above voltage-stabiliser tube of voltage stabilizing value 12V at least, the saturation voltage drop of supposing the first switch is 0.2v, 35 the first switch conductions produce the 7V pressure drop at least, so the voltage stabilizing value of voltage stabilizing didoe ZD35 the best is 12+7=19V.
The pulsating voltage of alternating current 220V after rectification, the about 320V of peak value, before pulsating voltage rises to 9V from 0, circuital current is zero, when pulsating voltage continues to rise, before arriving 19V, Vin voltage drives the Q1-35 conducting through resistance R 1-35, and first switch Q1-1 ~ Q1-35 in each module is all saturated, electric energy only consumes at flow restricter CL20, pulsating voltage rises when surpassing 19V, voltage stabilizing didoe ZD35 conducting, the second switch conducting of N35, control the first switch and enter cut-off state, it is luminous that electric current flows through the LED of N35, afterwards along with Vin voltage continues to rise every rising 9V, luminous with regard to many one group of LED, sequence of light is followed successively by N34, N33, N32, ..N1, as long as voltage is enough high, N1 will be luminous.Beginning was toward descending after Vin arrived peak, and along with the decline of voltage, each is organized LED and can extinguish successively again, order be N1, N2, N3 ... N35.
The pulsating voltage of alternating current 220V after rectification rises when arriving certain value, and the LED of N35 is luminous, afterwards along with Vin voltage continues to rise, LED is luminous for the N34 group, sequence of light be followed successively by N35, N34, N33, N32 ... ..N1, as long as voltage is enough high, N1 will be luminous.Beginning was toward descending after Vin arrived peak, and along with the decline of voltage, each is organized LED and can extinguish successively again, order be N1, N2, N3 ... N35.
From above analysis, prior art is to judge to determine the quantity that LED lights according to the height of pulsating voltage, and the operating time of the LED operating time that corresponding low pressure the is lighted LED that just can light greater than high pressure.Its shortcoming is that glow frequency is not high, is generally 100 or 120Hz.Although human eye can't be felt flicker, the rolling of the picture filaments of sun and flicker can appear in picture pick-up device when using.
In view of this, under the condition that pulsation drives the glow frequency of LED being promoted also is highly significant.
[summary of the invention]
Technical problem to be solved by this invention is to provide a kind of LED pulsation driving frequency to promote circuit, can make glow frequency be promoted to 400HZ or higher.
The present invention solves the problems of the technologies described above by the following technical solutions:
A kind of LED pulsation driving frequency promotes circuit, comprises switch module, the switch module of a measuring ability with voltage, a single-way switch, one the one LED lamp group, one the 2nd LED lamp group of switch module, one second detection with voltage and the current-limiting function of a bridge rectifier, one first detection with voltage and current-limiting function;
Described bridge rectifier output head anode connects respectively the switch module of the described first detection with voltage and current-limiting function and the switch module of the second detection with voltage and current-limiting function, and described bridge rectifier output head anode also connects the switch module of described measuring ability with voltage; Described bridge rectifier minus earth;
It is anodal that the switch module of the described first detection with voltage and current-limiting function also connects a described LED lamp group, a described LED lamp group minus earth;
It is anodal that the switch module of the described second detection with voltage and current-limiting function also connects described the 2nd LED lamp group, and described the 2nd LED lamp group negative pole connects the switch module of described measuring ability with voltage; The switch module other end ground connection of described measuring ability with voltage;
Connect described single-way switch between described LED lamp group positive pole and described the 2nd LED lamp group negative pole; The positive pole of described single-way switch connects described the 2nd LED lamp group negative pole, and it is anodal that the negative pole of described single-way switch connects a LED lamp group;
The switch module of the described first detection with voltage and current-limiting function comprises one first voltage comparator, one first flow restricter, one first Live switch; The input of the input of described the first voltage comparator and described the first flow restricter all is connected to the positive pole of described bridge rectifier; The output of described the first voltage comparator links to each other with the control end of the first Live switch; The output of described the first flow restricter connects the input of described the first Live switch; The output of described the first Live switch connects a described LED lamp group;
The switch module of the described second detection with voltage and current-limiting function comprises a second voltage comparator, one second flow restricter, one second Live switch; The input of the input of described second voltage comparator and described the second flow restricter all is connected to the positive pole of described bridge rectifier; The output of described second voltage comparator links to each other with the control end of the second Live switch; The output of described the second flow restricter connects the input of described the first Live switch; The output of described the second Live switch connects described the 2nd LED lamp group;
The switch module of described measuring ability with voltage comprises a tertiary voltage comparator, one the 3rd Live switch; The positive pole of the described bridge rectifier that the input of described tertiary voltage comparator is connected to; The output of described tertiary voltage comparator links to each other with the control end of described the 3rd Live switch; The output head grounding of described the 3rd Live switch.
Further, described the first voltage comparator, described second voltage comparator, described tertiary voltage comparator are voltage stabilizing didoes.
Further, described the first flow restricter, the second flow restricter are resistance, or have the circuit of current-limiting function.
Further, described the first Live switch, described the second Live switch, described the 3rd Live switch are triode or field effect transistor, perhaps by the two multiple tube that forms.
Further, described single-way switch is diode, or has the circuit of single-way switch function.
The invention has the advantages that: 1, make glow frequency be promoted to 400HZ or higher.2, the fluorescent lifetime of all light-emitting diodes is identical with electric current, can realize the to greatest extent utilization of light-emitting diode, so that the number of LED is minimized, reduces product cost and enhances competitiveness.3, because glow frequency is high and each LED fluorescent lifetime is identical, so in the single pulse electric current can be set in lower, safe, the rational scope, realize enough brightness.4, because frequency rises, and pulse current peak descends, the semi-conductive current specification of drive circuit requires to reduce, and integrated easier, cost decreases.5, the connecting line between driving power and the LED group only has two, and layout flexibly, simply.
[description of drawings]
The invention will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is prior art LED AC driven power circuit diagram.
Fig. 2 is that LED pulsation driving frequency of the present invention promotes circuit diagram.
Fig. 3 is another embodiment of the present invention schematic diagram.
[embodiment]
As shown in Figure 2, a kind of LED pulsation driving frequency promotes circuit, comprises switch module 3, the switch module 4 of a measuring ability with voltage, a single-way switch D1, one the one LED lamp group 5, one the 2nd LED lamp group 6 of switch module 2, one second detection with voltage and the current-limiting function of a bridge rectifier 1, one first detection with voltage and current-limiting function.
Bridge rectifier 1 positive pole connects respectively the switch module 2 of the first detection with voltage and current-limiting function and the switch module 3 of the second detection with voltage and current-limiting function, and bridge rectifier 1 positive pole is gone back the switch module 4 of connecting band voltage detecting function; Bridge rectifier 1 minus earth;
The switch module 2 of the first detection with voltage and current-limiting function also connects 2 the one LED lamp groups, 5, the one LED lamp groups, 5 other end ground connection;
The switch module 3 of the second detection with voltage and current-limiting function also connects the switch module 4 of the 2nd LED lamp group 6, the two LED lamp groups 6 other end connecting band voltage detecting functions; Switch module 4 other end ground connection of measuring ability with voltage;
Connect single-way switch D1 between the switch module 2 of the first detection with voltage and current-limiting function and the 2nd LED lamp group 6;
The switch module 2 of the first detection with voltage and current-limiting function comprises one first voltage comparator ZD1, one first flow restricter CL1, one first Live switch K1; The input of the input of the first voltage comparator ZD1 and the first flow restricter CL1 all is connected to the positive pole of bridge rectifier 1; The control end of the first voltage comparator ZD1 and the output of the first flow restricter CL1 all are connected the input of the first Live switch K1; The output of the first Live switch K1 connects a LED lamp group 5;
The switch module 3 of the second detection with voltage and current-limiting function comprises a second voltage comparator ZD2, one second flow restricter CL2, one second Live switch K2; The input of second voltage comparator ZD2 and the input of the second flow restricter CL2 all are connected to the positive pole of bridge rectifier 1; The control end of second voltage comparator ZD2 and the output of the second flow restricter C2 all are connected the input of the second Live switch K2; The output of the second Live switch K2 connects the 2nd LED lamp group 6;
The switch module 4 of measuring ability with voltage comprises a tertiary voltage comparator Z3, one the 3rd Live switch K3; The positive pole of the bridge rectifier 1 that the input of tertiary voltage comparator K3 is connected to; The control end of tertiary voltage comparator K3 connects the input of the 3rd Live switch K3; The output head grounding of the 3rd Live switch K3.
The each several part circuit function:
Alternating current becomes pulsating voltage Vin and exports to this device behind bridge rectifier, positive pole links to each other with the upper end of ZD1 ~ ZD3.The one LED lamp group 5 and the 2nd LED lamp group 6 are two LED lamp groups, are formed respectively the identical LED of the same type of the identical progression of namely connecting of the pressure drop Vf of two groups of lamp strings by a plurality of LED series and parallels.D1 is single-way switch, when the switch right-to-left conducting during greater than the left side of the voltage on switch the right, otherwise then for disconnecting.K1, K2, K3 are Live switch, and ZD1 ZD2 is used for respectively detecting flow restricter CL1 and CL2 both end voltage, when voltage disconnects K1 K2 greater than certain value the time; Tertiary voltage comparator ZD3 is used for detecting rectifier output voltage, controls the 3rd Live switch K3 when this voltage during greater than certain value and makes its open circuit.
The course of work:
When Vin voltage is lower than Vf, the lamp group does not all work, when Vin voltage is higher than Vf, because K1, K2, K3 are conducting states, and D1 is in open-circuit condition, and a LED lamp group 5 and the 2nd LED lamp group 6 are in state in parallel, and the electric current of each lamp group is controlled respectively by CL1, CL2 respectively, the one LED lamp group 5 and the 2nd LED lamp group 6 are simultaneously luminous, and brightness can realize unanimously.
The conducting voltage of supposing ZD1/2 is 12V, and when the K1/2 cut-off during greater than 12V of CL1/2 both end voltage, a LED lamp group 5/ the 2nd LED lamp group 6 is extinguished; The conducting voltage set point of ZD3 should add 12V greater than the conduction voltage drop of LED lamp group, as Vin during greater than Vf+12V, and ZD3 conducting, K3 cut-off.
Along with the continuation of Vin is risen, when magnitude of voltage during greater than 2 * Vf, because this moment, the CL2 both end voltage was lower than 12V, so K2 reverts to again conducting state, this moment, current direction was Vin+-CL2-LED2-D1-LED1-Vin-, and a LED lamp group 5/ the 2nd LED lamp group 6 is series relationship, but because electric current is still controlled by CL2, and equal CL1, so a LED lamp group 5/ the 2nd LED lamp group 6 illumination effects of changing into after being connected in series are identical when in parallel, secondary such as brightness such as realizations grade is luminous.When alternating current descends from peak is past, such twice luminescence process with brightness can appear equally, and each light-emitting diode is taken full advantage of on an equal basis.Choose suitable Vf can realize half ac cycle medium blanking time, etc. 4 times of brightness luminous, the alternating current of 50Hz has become the illumination effect of 400Hz so originally, has eliminated scintillation.
The present invention is when using, the connected mode of the switch module 3 of switch module 2, the second detection with voltage and current-limiting function by the described first detection with voltage and current-limiting function and switch module 4 frequency upgrading of realizing of measuring ability with voltage, can also be to realize with the integrated circuit 7 of voltage logic control by one, as shown in Figure 3.
Specifically comprise a bridge rectifier 1, an integrated circuit 7 with the voltage logic control, one first flow restricter CL1, one second flow restricter CL2, one first Live switch K1, one second Live switch K2, one the 3rd Live switch K3, a single-way switch D1, one the one LED lamp group 5 and one the 2nd LED lamp group 6; Described integrated circuit 7 comprises a detection voltage detection module 71 for detection of input voltage, that is electrically connected successively and is used for judging the input voltage size and whether exporting the Voltage-output module 73 that the logic control element 72 and of controlling voltage is controlled Voltage-output; Described Voltage-output module 73 is electrically connected with described the first Live switch K1, the second Live switch K2 and the 3rd Live switch K3 three respectively;
Described bridge rectifier 1 output head anode connects respectively the input of described voltage detection module 71, the first flow restricter CL1 and the input of the second flow restricter CL2; Described bridge rectifier 1 minus earth;
The output of described the first flow restricter CL1 connects the input of described the first Live switch K1; The output of the output of described the first Live switch K1, single-way switch D1 and a LED lamp group 5 anodal threes are electrically connected, and a described LED lamp group 5 minus earths;
The output of described the second flow restricter CL2 connects the input of described the second Live switch K2; The output of described the second Live switch K2 and described 6 anodal connections of the 2nd LED lamp group; The input of described the 2nd LED lamp group 6 negative poles, single-way switch D1 and the input three of the 3rd Live switch K3 are electrically connected, and the output head grounding of described the 3rd Live switch K3.
Described logic control element 72 obtains voltage detection module 71 and judges from the voltage that bridge rectifier 1 collects; Supply power voltage is VI, and a LED lamp group 5 is VP with the 2nd LED lamp group 6 the two operating voltage in parallel, and a LED lamp group 5 is VS with the 2nd LED lamp group 6 the two operating voltage of connecting; When VI＞VP, input voltage by Voltage-output module 73 control K1, K2, K3, make K1, K2, the equal conducting of K3 three, the one LED lamp group 5 and the 2nd LED lamp group 6 the two parallel operation, through setting light the time after, by the input voltage of Voltage-output module 73 control K1, K2, the two all disconnects to make K1, K2, and first, second LED lamp group (5,6) is all extinguished; When VI＞VS, input voltage by Voltage-output module 73 control K1, K2, K3, make the K2 conducting, and make K1, K3 keep opening circuit, the one LED lamp group 5 and 6 the two tandem working of the 2nd LED lamp group, through setting light the time after, by the input voltage of Voltage-output module 73 control K1, K2, the two all disconnects to make K1, K2, and first, second LED lamp group is all extinguished; When VI continues to rise to ceiling voltage and descends subsequently, then by the input voltage of Voltage-output module 73 control K1, K2, K3, make first, second LED lamp group all be introduced into series model and light and enter again paralleling model and light; The time of the lighting when time of lighting rises with voltage is identical, fall time between lighting for twice also identical extinguishing allow a LED lamp group 5 and the 2nd LED lamp group 6 uniformly-spaced light 4 times in the operating time in a half-wave of supply power voltage, namely realize the lifting of LED ignition frequency.
Above-described embodiment and graphic and non-limiting product form of the present invention and style, any person of an ordinary skill in the technical field all should be considered as not breaking away from patent category of the present invention to its suitable variation or modification of doing.
Claims (6)
1. a LED pulsation driving frequency promotes circuit, it is characterized in that: the switch module, the switch module of a measuring ability with voltage, a single-way switch, one the one LED lamp group, one the 2nd LED lamp group that comprise switch module, one second detection with voltage and the current-limiting function of a bridge rectifier, one first detection with voltage and current-limiting function;
Described bridge rectifier output head anode connects respectively the switch module of the described first detection with voltage and current-limiting function and the switch module of the second detection with voltage and current-limiting function, and described bridge rectifier output head anode also connects the switch module of described measuring ability with voltage; Described bridge rectifier minus earth;
It is anodal that the switch module of the described first detection with voltage and current-limiting function also connects a described LED lamp group, a described LED lamp group minus earth;
It is anodal that the switch module of the described second detection with voltage and current-limiting function also connects described the 2nd LED lamp group, and described the 2nd LED lamp group negative pole connects the switch module of described measuring ability with voltage; The switch module other end ground connection of described measuring ability with voltage;
Connect described single-way switch between described LED lamp group positive pole and described the 2nd LED lamp group negative pole; The positive pole of described single-way switch connects described the 2nd LED lamp group negative pole, and it is anodal that the negative pole of described single-way switch connects a LED lamp group.
2. LED pulsation driving frequency as claimed in claim 1 promotes circuit, it is characterized in that:
The switch module of the described first detection with voltage and current-limiting function comprises one first voltage comparator, one first flow restricter, one first Live switch; The input of the input of described the first voltage comparator and described the first flow restricter all is connected to the positive pole of described bridge rectifier; The output of described the first voltage comparator links to each other with the control end of the first Live switch; The output of described the first flow restricter connects the input of described the first Live switch; The output of described the first Live switch connects a described LED lamp group;
The switch module of the described second detection with voltage and current-limiting function comprises a second voltage comparator, one second flow restricter, one second Live switch; The input of the input of described second voltage comparator and described the second flow restricter all is connected to the positive pole of described bridge rectifier; The output of described second voltage comparator links to each other with the control end of the second Live switch; The output of described the second flow restricter connects the input of described the first Live switch; The output of described the second Live switch connects described the 2nd LED lamp group;
The switch module of described measuring ability with voltage comprises a tertiary voltage comparator, one the 3rd Live switch; The positive pole of the described bridge rectifier that the input of described tertiary voltage comparator is connected to; The output of described tertiary voltage comparator links to each other with the control end of described the 3rd Live switch; The output head grounding of described the 3rd Live switch.
3. a kind of LED pulsation driving frequency as claimed in claim 2 promotes circuit, and it is characterized in that: described the first voltage comparator, described second voltage comparator, described tertiary voltage comparator are voltage stabilizing didoes.
4. a kind of LED pulsation driving frequency as claimed in claim 2 promotes circuit, and it is characterized in that: described the first flow restricter, the second flow restricter are resistance, or have the circuit of current-limiting function.
5. a kind of LED pulsation driving frequency as claimed in claim 2 promotes circuit, and it is characterized in that: described the first Live switch, described the second Live switch, described the 3rd Live switch are triode or field effect transistor, perhaps by the two multiple tube that forms.
6. a kind of LED pulsation driving frequency as claimed in claim 1 promotes circuit, and it is characterized in that: described single-way switch is diode, or has the circuit of single-way switch function.
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| CN201210372297.5A CN102984851B (en) | 2012-09-29 | 2012-09-29 | Light-emitting diode (LED) pulsation driving frequency improving circuit |
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| CN201210372297.5A CN102984851B (en) | 2012-09-29 | 2012-09-29 | Light-emitting diode (LED) pulsation driving frequency improving circuit |
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| CN102984851A true CN102984851A (en) | 2013-03-20 |
| CN102984851B CN102984851B (en) | 2015-04-15 |
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| CN201210372297.5A Expired - Fee Related CN102984851B (en) | 2012-09-29 | 2012-09-29 | Light-emitting diode (LED) pulsation driving frequency improving circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103220863A (en) * | 2013-04-22 | 2013-07-24 | 俞文英 | Flicker-free method for alternating current driving of light-emitting diodes (LEDs) and device thereof |
| CN109548227A (en) * | 2017-09-22 | 2019-03-29 | 株式会社小糸制作所 | Lamp circuit and lamps apparatus for vehicle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101605412A (en) * | 2009-07-17 | 2009-12-16 | 罗宏基 | The LED electrified light emitting circuit |
| CN101630920A (en) * | 2009-05-21 | 2010-01-20 | 立明股份有限公司 | LED lighting lamp and power supply device thereof |
| US20100090604A1 (en) * | 2008-10-09 | 2010-04-15 | Yasuhiro Maruyama | Led drive circuit, led illumination component, led illumination device, and led illumination system |
| CN102006703A (en) * | 2010-12-03 | 2011-04-06 | 何志雄 | Light-emitting diode (LED) lamp driving power supply |
| CN202841630U (en) * | 2012-09-29 | 2013-03-27 | 福州凡普科技有限公司 | Light-emitting diode (LED) pulse driving frequency improving circuit |
-
2012
- 2012-09-29 CN CN201210372297.5A patent/CN102984851B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100090604A1 (en) * | 2008-10-09 | 2010-04-15 | Yasuhiro Maruyama | Led drive circuit, led illumination component, led illumination device, and led illumination system |
| CN101630920A (en) * | 2009-05-21 | 2010-01-20 | 立明股份有限公司 | LED lighting lamp and power supply device thereof |
| CN101605412A (en) * | 2009-07-17 | 2009-12-16 | 罗宏基 | The LED electrified light emitting circuit |
| CN102006703A (en) * | 2010-12-03 | 2011-04-06 | 何志雄 | Light-emitting diode (LED) lamp driving power supply |
| CN202841630U (en) * | 2012-09-29 | 2013-03-27 | 福州凡普科技有限公司 | Light-emitting diode (LED) pulse driving frequency improving circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103220863A (en) * | 2013-04-22 | 2013-07-24 | 俞文英 | Flicker-free method for alternating current driving of light-emitting diodes (LEDs) and device thereof |
| CN103220863B (en) * | 2013-04-22 | 2015-04-15 | 俞文英 | Flicker-free method for alternating current driving of light-emitting diodes (LEDs) and device thereof |
| CN109548227A (en) * | 2017-09-22 | 2019-03-29 | 株式会社小糸制作所 | Lamp circuit and lamps apparatus for vehicle |
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| CN102984851B (en) | 2015-04-15 |
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