CN103313483A - Dimming control method for light-emitting diode (LED) - Google Patents
Dimming control method for light-emitting diode (LED) Download PDFInfo
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- CN103313483A CN103313483A CN2013102561063A CN201310256106A CN103313483A CN 103313483 A CN103313483 A CN 103313483A CN 2013102561063 A CN2013102561063 A CN 2013102561063A CN 201310256106 A CN201310256106 A CN 201310256106A CN 103313483 A CN103313483 A CN 103313483A
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Abstract
Provided is a dimming control method for a light-emitting diode (LED). One-path direct current signals which direct current voltage serves as are adopted for a power supply provided for the LED, cosine signals different in frequencies and ranges are adopted to serve as first-path harmonic signals, second-path harmonic signals and third-path harmonic signals, and the four-way signals are overlaid and input to an LED lamp. After the four-way signals are overlaid, mixed signals have periodicity, a period is T, the duty cycle during one period is about a, and the highest range is about U; and the value of the duty cycle a is adjusted, namely the frequencies of the first-path harmonic signals, the second-path harmonic signals and the third-path harmonic signals are changed, so that the brightness of the LED lamp is adjusted.
Description
Technical field
The present invention relates to the dimming controlling method of a kind of LED, be mainly used in regulating control LED street lamp brightness.
Background technology
LED is semiconductor light-emitting-diode, and the advantage such as have that light efficiency is high, little power consumption, life-span are long, easy to control is useful in family, market, hospital, hotels and other places illumination.As a kind of light source, light modulation is very important, when not affecting lighting environment, can realize energy-saving and emission-reduction.Led light source has become a kind of important energy-conserving light source, and for led light source, light modulation more easily realizes than other fluorescent lamps, high-pressure sodium lamp etc., so more should add the function of light modulation in the LED light fixture.
Common light modulation mainly comprises the light regulating technology that adopts DC power supply LED, adopts pulse-width modulation (PWM) light regulating technology, adopts controllable silicon to the LED light regulating technology.Wherein the light regulating technology of DC power supply LED has the advantages such as equipment is simple, with low cost, is offset and can't realizes the shortcomings such as accurate light modulation but can produce chromatogram; Pulse-width modulation (PWM) light regulating technology has high light modulation accuracy and can not produce the advantage such as any chromatogram skew, but can't resolve the whistle that light modulation causes and the problem that the LED life-span is affected; Controllable silicon has the advantages such as equipment is simple, energy-conservation to the LED light regulating technology, but non-sinusoidal waveform has wherein strengthened the circuit harmonizing wave coefficient, and produces on the line serious interference signal.Therefore people need a kind of new LED dimming controlling method.
Summary of the invention
Main purpose of the present invention is, a kind of new LED light-dimming method is provided.Especially affect little on the LED life-span; And produce on the line interference signal little LED light-dimming method and circuit.
Technical scheme of the present invention is, the dimming controlling method of a kind of LED, the power supply that provides of LED is adopted the direct current signal of one road direct voltage conduct, the different cosine signal of proportion and amplitude is as one road harmonic wave, two road harmonic waves, three road harmonic signals, and four road signals are superimposed, input to the LED lamp, after four road signals were superimposed, mixed signal had periodically, and the cycle is T, and duty ratio is about a in one-period, and high-amplitude is about U; Regulate the value of duty ratio a, namely change the frequency of one road harmonic wave, two road harmonic waves, three road harmonic signals, adjusting brightness of LED lamps.
Further, regulate the value of U, change the amplitude of direct current, one road harmonic wave, two road harmonic waves, three road harmonic signals, adjusting brightness of LED lamps.
Further, adopt the direct current signal of one road direct voltage conduct, the different cosine signal of proportion and amplitude is as one road harmonic wave, two road harmonic waves, three road harmonic signals, and the amplitude of direct-flow signal voltage is 2Ua; The amplitude of the cosine signal of one road harmonic wave is
Frequency is
Initial phase is 0.
Further, the amplitude of the cosine signal of two road harmonic waves is
Frequency is
Initial phase is 0.
Further, the amplitude of the cosine signal of three road harmonic waves is
Frequency is
Initial phase is 0.
Adopt simultaneously two kinds of methods to regulate LED brightness.
The invention has the beneficial effects as follows: adopt the superimposed mode of four road signals to input to the LED lamp, have equipment simple, with low cost, reduced the interference of nonsinusoidal signal to the generation harmonic wave of circuit, the useful life of having improved the LED lamp.The employing amplitude or (with) duty ratio a regulates the brightness such as LED, has the advantages such as degree of regulation is high, easy operating, energy savings.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the voltage oscillogram of the embodiment of the invention four road signals stack;
Fig. 3 is the voltage oscillogram of four road signals stack of the embodiment of the invention 2.
Embodiment
Below in conjunction with the accompanying drawing embodiment the present invention is described in further detail.
Embodiment 1:LED lamp ceiling voltage 12v, demand duty ratio 50%, period frequency is 100Hz, direct-flow signal voltage is that the voltage amplitude of direct current signal is 12v; The cosine signal of one road harmonic wave be 7.64cos (314t) v; The cosine signal of two road harmonic waves is 0; The cosine signal of three road harmonic waves is-2.54cos (942t).
Embodiment 2:LED lamp ceiling voltage 12v, demand duty ratio 33%, period frequency is 200Hz, direct-flow signal voltage is that the voltage amplitude of direct current signal is 7.92v; The cosine signal of one road harmonic wave be 6.62cos (628t) v; The cosine signal of two road harmonic waves is 3.31cos (1256t) v; The cosine signal of three road harmonic waves is 0.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. the dimming controlling method of a LED, it is characterized in that the power supply that provides of LED is adopted the direct current signal of one road direct voltage conduct, the different cosine signal of proportion and amplitude is as one road harmonic wave, two road harmonic waves, three road harmonic signals, four road signals are superimposed, input to the LED lamp, after four road signals are superimposed, mixed signal has periodically, cycle is T, and duty ratio is about a in one-period, and high-amplitude is about U; Regulate the value of duty ratio a, namely change the frequency of one road harmonic wave, two road harmonic waves, three road harmonic signals, adjusting brightness of LED lamps.
2. the dimming controlling method of LED according to claim 1, the value that it is characterized in that regulating U changes the amplitude of direct current, one road harmonic wave, two road harmonic waves, three road harmonic signals, adjusting brightness of LED lamps.
3. the dimming controlling method of LED according to claim 1 and 2, it is characterized in that adopting the direct current signal of one road direct voltage conduct, the different cosine signal of proportion and amplitude is as one road harmonic wave, two road harmonic waves, three road harmonic signals, and the amplitude of direct-flow signal voltage is 2Ua; The amplitude of the cosine signal of one road harmonic wave is
Frequency is
Initial phase is 0.
4. the dimming controlling method of LED according to claim 1 and 2 is characterized in that the amplitude of the cosine signal of two road harmonic waves is
Frequency is
Initial phase is 0.
5. the dimming controlling method of LED according to claim 1 and 2 is characterized in that the amplitude of the cosine signal of three road harmonic waves is
Frequency is
Initial phase is 0.
6. the dimming controlling method of LED according to claim 1 is characterized in that adopting simultaneously two kinds of methods to regulate LED brightness; Namely regulate simultaneously the value of duty ratio a, namely change the frequency of one road harmonic wave, two road harmonic waves, three road harmonic signals; And the value of regulating U, change the amplitude adjusted LED brightness of direct current, one road harmonic wave, two road harmonic waves, three road harmonic signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310256106.3A CN103313483B (en) | 2013-06-24 | 2013-06-24 | Dimming control method for light-emitting diode (LED) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310256106.3A CN103313483B (en) | 2013-06-24 | 2013-06-24 | Dimming control method for light-emitting diode (LED) |
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| Publication Number | Publication Date |
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| CN103313483A true CN103313483A (en) | 2013-09-18 |
| CN103313483B CN103313483B (en) | 2015-02-25 |
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| CN201310256106.3A Expired - Fee Related CN103313483B (en) | 2013-06-24 | 2013-06-24 | Dimming control method for light-emitting diode (LED) |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105262500A (en) * | 2015-09-06 | 2016-01-20 | 苏州华启智能科技有限公司 | Multichannel FM (Frequency Modulation) radio-frequency mixed active output circuit |
| US10015867B2 (en) | 2014-10-07 | 2018-07-03 | Curbell Medical Products, Inc. | Low-voltage controller with dimming function and method |
| CN113870784A (en) * | 2021-09-28 | 2021-12-31 | 京东方科技集团股份有限公司 | Display device and driving method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2038305U (en) * | 1988-09-20 | 1989-05-24 | 薛福瑰 | Multi-function energy saving lamp |
| US6377163B1 (en) * | 2000-09-21 | 2002-04-23 | Home Touch Lighting Systems Llc | Power line communication circuit |
| CN101146392A (en) * | 2006-09-14 | 2008-03-19 | 三多尼克爱特克两合股份有限公司 | Electronic cut-in unit with asymmetrical inverter actuation |
-
2013
- 2013-06-24 CN CN201310256106.3A patent/CN103313483B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2038305U (en) * | 1988-09-20 | 1989-05-24 | 薛福瑰 | Multi-function energy saving lamp |
| US6377163B1 (en) * | 2000-09-21 | 2002-04-23 | Home Touch Lighting Systems Llc | Power line communication circuit |
| CN101146392A (en) * | 2006-09-14 | 2008-03-19 | 三多尼克爱特克两合股份有限公司 | Electronic cut-in unit with asymmetrical inverter actuation |
Non-Patent Citations (1)
| Title |
|---|
| 王蓓蓓: "无电解电容的高亮度LED驱动电源研究", 《中国优秀硕士学位论文全文数据库信息科技辑》, no. 2, 15 December 2011 (2011-12-15), pages 21 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10015867B2 (en) | 2014-10-07 | 2018-07-03 | Curbell Medical Products, Inc. | Low-voltage controller with dimming function and method |
| US10165660B2 (en) | 2014-10-07 | 2018-12-25 | Curbell Medical Products, Inc. | Low-voltage controller with dimming function and method |
| CN105262500A (en) * | 2015-09-06 | 2016-01-20 | 苏州华启智能科技有限公司 | Multichannel FM (Frequency Modulation) radio-frequency mixed active output circuit |
| CN105262500B (en) * | 2015-09-06 | 2018-02-27 | 苏州华启智能科技有限公司 | A kind of multichannel FM radio frequencies are mixed with source follower circuit |
| CN113870784A (en) * | 2021-09-28 | 2021-12-31 | 京东方科技集团股份有限公司 | Display device and driving method |
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| Publication number | Publication date |
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| CN103313483B (en) | 2015-02-25 |
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Inventor after: Xia Jiaolan Inventor after: Wang Jilin Inventor after: Chen Rong Inventor after: Ji Zhengbiao Inventor after: Bian Jinhong Inventor after: Zhou Feng Inventor after: Sun Ganchao Inventor after: Wang Rugang Inventor before: Wang Jilin Inventor before: Xia Jiaolan Inventor before: Chen Rong Inventor before: Ji Zhengbiao Inventor before: Bian Jinhong Inventor before: Zhou Feng Inventor before: Sun Ganchao Inventor before: Wang Rugang |
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Free format text: CORRECT: INVENTOR; FROM: WANG JILIN XIA SHULAN CHEN RONG JI ZHENGBIAO BIAN JINHONG ZHOU FENG SUN GANCHAO WANG RUGANG TO: XIA SHULAN WANG JILIN CHEN RONG JI ZHENGBIAO BIAN JINHONG ZHOU FENG SUN GANCHAO WANG RUGANG |
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