CN103025000A - LED (light-emitting diode) dimming control system based on PWM (pulse-width modulation) - Google Patents
LED (light-emitting diode) dimming control system based on PWM (pulse-width modulation) Download PDFInfo
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- CN103025000A CN103025000A CN2012104925835A CN201210492583A CN103025000A CN 103025000 A CN103025000 A CN 103025000A CN 2012104925835 A CN2012104925835 A CN 2012104925835A CN 201210492583 A CN201210492583 A CN 201210492583A CN 103025000 A CN103025000 A CN 103025000A
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Abstract
The invention discloses an LED (light-emitting diode) dimming control system based on a PWM (pulse-width modulation), and relates to the technical field of the regional lighting control of the LED. The system comprises a PWM wireless dimming controller, and 2-10 PWM wireless signal receiving units for respectively receiving wireless signals from the PWSM dimming controller, wherein a signal output end of each PWM wireless signal receiving unit is respectively connected with a PWM dimming constant current driving power source, and a constant current output end of each PWM dimming constant current driving power source is respectively connected with a group of LED lighting units. The system is more suitable for realizing the uniform control of the lighting requirement in various function regions in house or small office environment, the single dimming controller can simultaneously control and regulate 2-10 groups of LED lighting units, and the regulation range is 0-100%; meanwhile, the system can realize the regulation to the illumination and color temperature of light environment in a plurality of small spaces and the changing-over of light and shade combinations of different lighting unit combinations.
Description
Technical field
The present invention relates to a kind of power supply output control technology, particularly be applied to the regional Lighting Control Assembly of LED.
Background technology
In the general illumination field, the dimming behavior of light source has become one of important indicator of weighing the lighting apparatus serviceability.LED has begun to have entered general illumination market as a kind of efficient emerging green illumination light source, and for the brightness that guarantees LED and colour temperature stable, the general employing has the Switching Power Supply of constant current output as driving, for constant-current switch power source output brightness adjustment control, general dimming interface mode mainly contains following three kinds at present: a kind of mode is directly to regulate forward current by the current sense resistor that changes and LED connects, but this mode can cause the variation of chromatogram skew and colour temperature; The second is to change its angle of flow by controllable silicon, realization changes the mode of effective value and carries out light modulation, although this mode has been widely used in the light modulation of incandescent lamp and halogen lamp, consider that from the compatible direction that LED directly replaces tool has great advantage really, but its power factor (PF) is low, harmonic constant large, poor anti-interference, low load is unstable and the audio-frequency noise that produces and the shortcoming of flicker but are unavoidable; The third is pulse-width modulation (PWM) light modulation, by changing the duty ratio of pwm signal, turn-off fast LED and realize light modulation, but this light modulation is mainly used on LED lamp bar or the light fixture by the series-parallel individuality of a plurality of led chips at present, for zonal light modulation also to rely on complex structure, total line traffic control formula intelligence system of involving great expense operates, and is blank for light adjusting systems among a small circle such as general household or minimized office districts.
Summary of the invention
The present invention is directed to the prior art problem, propose a kind of direct point-to-point control, light modulation flicker free, ageing height, LED dimming control system based on PWM easy to use, simple in structure realized.
The present invention includes a PWM Wireless Light modulating controller, 2～10 PWM reception of wireless signals unit that receive respectively wireless signal from described PWM light adjusting controller, signal output part in each PWM reception of wireless signals unit connects respectively a PWM light modulation constant-current driving power supply, connects respectively one group of LED lighting unit at the constant current output end of each PWM light modulation constant-current driving power supply.
After the PWM light adjusting controller sends wireless signal, PWM wireless signal unit receives this signal and drives the constant-current source output pwm signal to each PWM light modulation, light modulation drives the pwm signal regulation output electric current that constant-current source sends according to the PWM wireless receiving module, because the LED lighting unit of each group photoelectric characteristic coupling is connected to the constant current output end of a PWM light modulation constant-current driving power supply, so, the present invention only passes through with a radio receiving unit, it is unit that a PWM light modulation constant-current driving power supply is added a plurality of LED light fixtures, reach and regulate an among a small circle purpose of the illumination in space, and the wireless transmission controller illumination that can to control a plurality of wireless receiving controllers be a plurality of among a small circle spaces, can replace and expend huge baroque bus type intelligent illuminator, and high efficiency of the present invention, the light flicker free, abandoned the structure of the numerous and complicated of bus type intelligent control, circuit structure is simple, and is easy to use.
The present invention is more suitable for the lighting demand (wherein each functional area is the among a small circle space that area is no more than 30 square meters) of each functional area in household or small office/home office and realizes unified control, can organize described LED lighting unit by while regulating and controlling 2-10 by single described light adjusting controller, adjustable range is 0-100%, can realize the illumination to luminous environment in a plurality of among a small circle spaces, the adjusting of colour temperature and the switching of different lighting unit combination light and shade combination simultaneously.
Description of drawings
Fig. 1 is a kind of structured flowchart of the present invention.
Fig. 2 is the modular structure figure of wireless controller of the present invention
Embodiment
As shown in Figure 1, a kind of LED provided by the invention comprises a PWM Wireless Light modulating controller 1 based on the brightness adjustment control of PWM and the among a small circle control system of scene change, ten PWM reception of wireless signals unit 2, ten PWM light modulation constant-current driving power supplies 3, each PWM light modulation constant-current driving power supply 3 is connected to the signal output part of a PWM reception of wireless signals unit 2, each PWM light modulation constant-current driving power supply 3 is respectively equipped with the 220V ac working power supply, and each PWM reception of wireless signals unit 2 is respectively equipped with the 12V dc supply.
According to the needs of target light environment, the constant current output end of each PWM light modulation constant-current driving power supply 3 connects respectively string or a plurality of LED lighting units 4 in parallel, thus light that can independent regulation one panel region.
Each led light source in each LED lighting unit 4 physical spatial location be evenly distributed in PWM reception of wireless signals unit 2 and PWM light modulation constant-current driving power supply 3 around.
In order to reach the lighting standard of routine office work, select in the present embodiment with the cold white light of a plurality of 1W high brightness and warm white LED lamp pearl and form separately two groups of different lighting units of colour temperature height, adjusting by wireless controller, can select the luminous environment of the amusement and recreation of the luminous environment of colour temperature 6500K operating illumination and 3000K, simultaneously, illumination can be in the scope of 0-150lx free adjustment.
Every group of lighting unit is comprised of the connection in series-parallel of 24 1W lamp pearls in the present embodiment, and the pressure drop of every lamp pearl is about 3.1V, and operating current is about 320mA, provides stable constant current output by the light modulation constant-current driving power supply of a specified 30W.This light modulation constant-current driving power supply preferably adopts high-performance constant current chip drives, the input civil power, and output maximum current 700mA, power factor is greater than 95%, and fully loaded conversion efficiency is up to 86%.According to the adjusting of pwm signal input 0-100% duty ratio, can realize the output of the constant current in the 0-700mA scope.Its light modulation constant current accuracy is ± 5%, has simultaneously excess temperature, overvoltage, overcurrent, short-circuit protection, can recover voluntarily to wait several functions after cancelling.This power supply is applicable to green illumination LED lamp drive circuit, has the very succinct advantage of application circuit.
As shown in Figure 2, PWM Wireless Light modulating controller 1 of the present invention and PWM reception of wireless signals unit 2 form by modules such as STM32 microcontroller, EEPROM, MAX3232 AccessPort module, crystal oscillator reset circuits, and simultaneously by the 12V DC power supply.And PWM Wireless Light modulating controller 1 also can select 1602 LCDs to add that button has consisted of display control panel, as showing the operating state of respectively organizing lighting unit.
Claims (1)
1. LED dimming control system based on PWM, it is characterized in that comprising a PWM Wireless Light modulating controller, 2～10 PWM reception of wireless signals unit that receive respectively wireless signal from described PWM light adjusting controller, signal output part in each PWM reception of wireless signals unit connects respectively a PWM light modulation constant-current driving power supply, connects respectively one group of LED lighting unit at the constant current output end of each PWM light modulation constant-current driving power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104925835A CN103025000A (en) | 2012-11-28 | 2012-11-28 | LED (light-emitting diode) dimming control system based on PWM (pulse-width modulation) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012104925835A CN103025000A (en) | 2012-11-28 | 2012-11-28 | LED (light-emitting diode) dimming control system based on PWM (pulse-width modulation) |
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| CN103025000A true CN103025000A (en) | 2013-04-03 |
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| CN2012104925835A Pending CN103025000A (en) | 2012-11-28 | 2012-11-28 | LED (light-emitting diode) dimming control system based on PWM (pulse-width modulation) |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105101577A (en) * | 2015-09-10 | 2015-11-25 | 南京邮电大学 | A light control system with switches embedded in the bracelet of a watch |
| CN107580392A (en) * | 2017-09-25 | 2018-01-12 | 欧普照明股份有限公司 | A constant power output system and lighting device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101511143A (en) * | 2009-03-25 | 2009-08-19 | 广东昭信光电科技有限公司 | High-power led wireless intelligent control system |
| US20100327758A1 (en) * | 2009-06-26 | 2010-12-30 | Chung Jinhwa | LED Light Emitting Device And Driving Method Thereof |
| CN202005028U (en) * | 2011-03-04 | 2011-10-05 | 厦门市朗星节能照明股份有限公司 | Light-emitting diode (LED) wireless dimming control system |
| CN102685993A (en) * | 2012-06-05 | 2012-09-19 | 江苏利鼎微系统有限公司 | LED illumination wireless control system |
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2012
- 2012-11-28 CN CN2012104925835A patent/CN103025000A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101511143A (en) * | 2009-03-25 | 2009-08-19 | 广东昭信光电科技有限公司 | High-power led wireless intelligent control system |
| US20100327758A1 (en) * | 2009-06-26 | 2010-12-30 | Chung Jinhwa | LED Light Emitting Device And Driving Method Thereof |
| CN202005028U (en) * | 2011-03-04 | 2011-10-05 | 厦门市朗星节能照明股份有限公司 | Light-emitting diode (LED) wireless dimming control system |
| CN102685993A (en) * | 2012-06-05 | 2012-09-19 | 江苏利鼎微系统有限公司 | LED illumination wireless control system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105101577A (en) * | 2015-09-10 | 2015-11-25 | 南京邮电大学 | A light control system with switches embedded in the bracelet of a watch |
| CN107580392A (en) * | 2017-09-25 | 2018-01-12 | 欧普照明股份有限公司 | A constant power output system and lighting device |
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Application publication date: 20130403 |