Segmented gray scale modulation of LED display and optimal scan clock access

YAN Fei1; 2; WANG Rui-guang1; DENG Yi-cheng1; ZHENG Xi-feng1

doi:10.3788/OPE.20132112.3248

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Segmented gray scale modulation of LED display and optimal scan clock access

更新时间：2020-08-12

- Segmented gray scale modulation of LED display and optimal scan clock access
- Optics and Precision Engineering Vol. 21, Issue 12, Pages: 3248-3254(2013)
- 作者机构：
  
  1. ．中国科学院长春光学精密机械与物理研究所,吉林长春,130033
  2. ．中国科学院大学北京,100039
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20132112.3248
  CLC： TN27;TN941.1
- Received：29 August 2012，
  
  Revised：25 October 2012，
  
  Published Online：25 December 2013，
  
  Published：25 December 2013
- 稿件说明：
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严飞, 王瑞光, 邓意成, 郑喜凤. 发光二极管显示屏分段灰度调制与优选扫描时钟获取[J]. 光学精密工程, 2013,21(12): 3248-3254

YAN Fei, WANG Rui-Guang, DENG Yi-Cheng, ZHENG Xi-Feng. Segmented gray scale modulation of LED display and optimal scan clock access[J]. Editorial Office of Optics and Precision Engineering, 2013,21(12): 3248-3254
严飞, 王瑞光, 邓意成, 郑喜凤. 发光二极管显示屏分段灰度调制与优选扫描时钟获取[J]. 光学精密工程, 2013,21(12): 3248-3254 DOI： 10.3788/OPE.20132112.3248.

YAN Fei, WANG Rui-Guang, DENG Yi-Cheng, ZHENG Xi-Feng. Segmented gray scale modulation of LED display and optimal scan clock access[J]. Editorial Office of Optics and Precision Engineering, 2013,21(12): 3248-3254 DOI： 10.3788/OPE.20132112.3248.

摘要

构建了一种发光二极管（LED）显示屏灰度等级调制模型以实现其灰度调制并获取优选扫描时钟。根据脉宽调制的特点，将灰度调制过程分为基本灰度等级调制和扩充灰度等级调制来构建灰度等级的调制模型。通过分析模型各参数关系，提出一种优选扫描时钟的选取方法和扫描时钟富裕系数的概念，并在此基础上总结了LED显示屏显示控制优化途径。最后，通过硬件平台验证并实现了该灰度等级模型。实验结果表明：对于4扫的LED显示屏，选取最小响应脉宽小于等于40 ns的驱动芯片可使刷新率为300 Hz、移存长度为128个像素点、灰度等级为14 bit的优选扫描时钟为10 MHz，同时其亮度利用率达到90%，最大扫描时钟富裕系数达到3.5。采用该模型实现灰度等级调制，可以满足LED显示屏的显示要求，可应用于实际工程项目。

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