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Method for regulating and controlling LED lamp lightness

A technology for regulating control and LED lights, applied in energy-saving control technology, light source, electric light source, etc., can solve the problems of limited application of LED lights, inability to control the dimming of LED lights, etc. The effect of expanding the scope of application

Inactive Publication Date: 2005-10-05
项珏 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it is not possible to directly control the dimming of LED lights by adjusting their bias voltage and operating current, which greatly limits the application of LED lights.

Method used

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  • Method for regulating and controlling LED lamp lightness
  • Method for regulating and controlling LED lamp lightness

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Experimental program
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Embodiment Construction

[0017] exist figure 1 A schematic diagram of the wiring method of the LED lamp using the method of the present invention is shown in . After the 220V AC power supply is processed by the LED light dimming device manufactured based on the method of the present invention, it outputs pulse-width-modulated pulse operating voltage V that can regulate and control the brightness of the LED light. 0 .

[0018] exist figure 2 The corresponding working voltage V of the LED lamp is shown when the brightness is adjusted to 100%, 99%, 50% and 5% respectively. 0 waveform. In the figure, t is a cycle time of the main frequency of LED dimming, and the cycle time t in the range of 60Hz to 180Hz main frequency is 16.7ms to 5.6ms. When the brightness was 100%, the LED lamp operating voltage V output by the LED lamp dimming device manufactured by the method of the present invention 0 It is 24V DC voltage, and this working state is the working state when the brightness cannot be adjusted unde...

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Abstract

Based on visual persistence of human eye, brightness theory of subjective sensation and characteristic of quick response of LED, controlling ducting pulse width of LED operating voltage realizes control for LED brightness when basic frequency of operational power supply is adjusted at 60Hz to 180Hz. Moreover, it is ensured that LED keeps pure white light within range of changing light brightness. The method described above is also applicable to LED in other color, that is to say brightness is adjusted while color is not changed basically. The invention solves difficult problem in brightness adjustment for LED, playing active effectiveness for using LED with advantages of energy saving, long service life, and no pollution etc.

Description

technical field [0001] The invention relates to a method for adjusting and controlling the brightness of a light, in particular to a method for adjusting and controlling the brightness of an LED light. Background technique [0002] Energy conservation is a global issue. Since Edison invented the electric light, incandescent lamps have dominated the field of human lighting for more than a hundred years. However, due to the great development of modern industry, the energy crisis has spread to almost all areas of people's lives. In order to save energy, people naturally think of consuming a large amount of energy every year. lighting source. At present, with the advancement of light-emitting semiconductor technology, the brightness of semiconductor light-emitting diodes (LEDs) is constantly increasing, especially white light-emitting diodes. Has developed into a high energy-saving, highly reliable lighting source. The work of the white light-emitting diode is mainly based on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/00H05B37/02
CPCY02B20/40
Inventor 项珏赵康康
Owner 项珏
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