Light regulating method for LED light regulating apparatus

A dimming device and series technology, applied in lighting devices, light sources, electric light sources, etc., can solve the problems of large light mutation amplification ratio, poor smoothness, rough surface, etc., and achieve the effect of ensuring the effect of gradually brightening and dimming.

Inactive Publication Date: 2009-02-04
GUANGZHOU YAJIANG PHOTOELECTRIC EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the dimming curve of 256-level grayscale is linearly increasing, the smoothness is relatively poor, the surface is rough, and the light mutation rate is relatively large

Method used

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  • Light regulating method for LED light regulating apparatus
  • Light regulating method for LED light regulating apparatus
  • Light regulating method for LED light regulating apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Such as figure 2 with image 3 As shown, a stage LED dimming device includes a microcontroller 1, a PWM dimming device 2 and an insulated gate type N-channel field effect transistor 3, the output of the microcontroller 1 is connected to the input of the PWM dimming device 2 The output terminal of the PWM dimming device 2 is connected to the gate of the insulated gate type N-channel field effect transistor 3 , and the drain of the insulated gate type N-channel field effect transistor 3 is connected to the LED group 4 . Wherein, the microcontroller 1 is a single-chip microcomputer or a CPU. The LED dimming curve of the LED lamp is represented by brightness and gray scale; wherein the Y axis of the LED dimming curve represents the brightness, and the unit is LX; wherein the X axis of the LED dimming curve represents the gray scale , the LED dimming curve is an increasing curve, and its dimming method is:

[0022] Firstly, the micro-controller 1 cooperates with the PWM ...

Embodiment 2

[0025] Such as figure 2 with Figure 4 As shown, a stage LED dimming device includes a microcontroller 1, a PWM dimming device 2 and an insulated gate type N-channel field effect transistor 3, the output of the microcontroller 1 is connected to the input of the PWM dimming device 2 The output terminal of the PWM dimming device 2 is connected to the gate of the insulated gate type N-channel field effect transistor 3 , and the drain of the insulated gate type N-channel field effect transistor 3 is connected to the LED group 4 . Wherein, the microcontroller 1 is a single-chip microcomputer or a CPU. The LED dimming curve of the LED lamp is represented by brightness and gray scale; wherein the Y axis of the LED dimming curve represents the brightness, and the unit is LX; wherein the X axis of the LED dimming curve represents the gray scale , the LED dimming curve is an increasing curve, and its dimming method is:

[0026] Firstly, the micro-controller 1 cooperates with the PWM...

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PUM

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Abstract

Disclosed is a light adjusting method of LED light adjusting device. The light adjusting device is composed of a microcontroller, a PWM light adjusting component and an insulated gate-type dynatron with N-channel field effect, through subdividing gray level and non-linear light adjusting, the light adjusting device can make the LED light fixture light adjusting become bright and dark gradually, reduce the sensitivity degree of human eyes to light change so as to create a perfect lighting environment, and the invention is applied to lighting fields such as stage lighting, construction lighting, landscape lighting and so on.

Description

technical field [0001] The invention relates to the technical field of semiconductor lighting, in particular to a dimming method of an LED dimming device. Background technique [0002] At present, with the rapid development of LED technology, the chips and various synthesis schemes are continuously improved, and the luminous efficacy is continuously improved. The brightness dimming of the LED is to change the brightness by changing the conduction time of the LED. The longer the conduction time of the LED per unit time, the higher the brightness. In practical applications, it is controlled by changing the duty cycle. Today's LED lamps use digital signals to control brightness and dimming. For example, DMX512 digital signal protocol is a control protocol commonly adopted by stage LED lamps today, and the value of each channel of DMX512 digital signal dimming system only changes from 0 to 255, which determines the LED dimming. There are only 256 gray levels of light correspon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
CPCY02B20/46Y02B20/40
Inventor 陈家强
Owner GUANGZHOU YAJIANG PHOTOELECTRIC EQUIP CO LTD
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