A Digital Dimming Color and Intensity Method of Three-channel LED

LUO Wei-an; WANG Han; CHEN Xin-du; ZENG Yao-bin; LI Zhi-jin; HE Rui-guo

doi:10.3788/fgxb20183903.0414

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A Digital Dimming Color and Intensity Method of Three-channel LED

更新时间：2020-08-12

- A Digital Dimming Color and Intensity Method of Three-channel LED
- Chinese Journal of Luminescence Vol. 39, Issue 3, Pages: 414-421(2018)
- 作者机构：
  
  1. 广东工业大学机电工程学院,广东广州,510006
  2. 佛山市质量计量监督检测中心,广东佛山,528000
- 作者简介：
- 基金信息：
  
  "
- DOI：10.3788/fgxb20183903.0414
  CLC： TP273
- Received：29 June 2017，
  
  Revised：18 September 2017，
  
  Published Online：12 October 2017，
  
  Published：05 March 2018
- 稿件说明：
移动端阅览
骆伟岸, 王晗, 陈新度等. 三通道PWM的数控调光调色方法[J]. 发光学报, 2018,39(3): 414-421

LUO Wei-an, WANG Han, CHEN Xin-du etc. A Digital Dimming Color and Intensity Method of Three-channel LED[J]. Chinese Journal of Luminescence, 2018,39(3): 414-421
骆伟岸, 王晗, 陈新度等. 三通道PWM的数控调光调色方法[J]. 发光学报, 2018,39(3): 414-421 DOI： 10.3788/fgxb20183903.0414.

LUO Wei-an, WANG Han, CHEN Xin-du etc. A Digital Dimming Color and Intensity Method of Three-channel LED[J]. Chinese Journal of Luminescence, 2018,39(3): 414-421 DOI： 10.3788/fgxb20183903.0414.

摘要

针对目前机器视觉光源存在工作时间长、需要现场工作人员手动调试、发热严重、适应能力差等问题，提出了一种基于PWM的数字控制光源，建立了混色光下三通道占空比与光照度的函数关系，分8种情况讨论，并分析了该模型的局限性。从调光原理、驱动原理和控制原理3方面详细说明了该数控光源的实现方法，并且对本文提出的数学模型进行了4种有代表性的实验测试。实验结果表明，该数学模型能满足大多数比例的混光模型，实现光源颜色、照度可调，上述问题均可得到良好的解决，同时提高光源寿命、节约能源。

Abstract

In machine vision

there are many problems exist in light-source

like long running times

manual debugging

heating seriously and poor adaptability. Accordingly

a digital dimming method of light source was proposed based on PWM technology

which was divided into eight situations. The limitation of this model was pointed out and the principals of the digital light-source was declared from three aspects:dimming theory

control theory as well as driving theory. In the meanwhile

four representative experiments were showed out. The results show that this method can satisfy most proportion of the mixed light models

and realize the adjustment of color as well as the change of illumination. With the function of trigger control

the above problems can be solved properly

at the same time

postponing aging of light-source and energy saving can be achieve as well.

关键词

Keywords

references

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