Improvement of nonuniformity correction of LED display images

CHANG Feng; SUN Zhi-yuan; WANG Rui-guang; ZHENG Xi-feng

doi:10.3788/OPE.20111904.0929

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Improvement of nonuniformity correction of LED display images

Article | 更新时间：2020-08-12

- Improvement of nonuniformity correction of LED display images
- Optics and Precision Engineering Vol. 19, Issue 4, Pages: 929-937(2011)
- 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,中国,130033
  2. 中国科学院研究生院,北京 100039
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20111904.0929
  CLC： TN27;TN941.1
- Received：19 April 2010，
  
  Revised：09 September 2010，
  
  Published Online：26 April 2011，
  
  Published：26 April 2011
- 稿件说明：
移动端阅览
常锋, 孙志远, 王瑞光, 郑喜凤. LED显示图像的非均匀度校正改进方法[J]. 光学精密工程, 2011,19(4): 929-937

CHANG Feng, SUN Zhi-yuan, WANG Rui-guang, ZHENG Xi-feng. Improvement of nonuniformity correction of LED display images[J]. Editorial Office of Optics and Precision Engineering, 2011,19(4): 929-937
常锋, 孙志远, 王瑞光, 郑喜凤. LED显示图像的非均匀度校正改进方法[J]. 光学精密工程, 2011,19(4): 929-937 DOI： 10.3788/OPE.20111904.0929.

CHANG Feng, SUN Zhi-yuan, WANG Rui-guang, ZHENG Xi-feng. Improvement of nonuniformity correction of LED display images[J]. Editorial Office of Optics and Precision Engineering, 2011,19(4): 929-937 DOI： 10.3788/OPE.20111904.0929.

摘要

针对LED显示屏在拼接过程中会出现显示图像非均匀度过高的问题

基于对现有CCD校正技术的改进

提出了非均匀度校正改进方法畸变校正法。首先

介绍了现有的基于CCD的非均匀度校正技术

同时

阐述了技术需要改进的原因。以模块拼接的LED显示屏为例

构建了畸变校正模型。该模型根据畸变模块位置和理想模块位置之间的非线性关系

修正LED显示屏各像素点的灰度值

实现非均匀度的校正。按照构造的模型

描述了畸变校正的实现步骤。最后

在一个分辨率为128 pixel128 pixel

模块的像素中心间距为7.62 mm

一个模块内只有一个像素点的LED显示屏上实现了该方法。实验结果表明

采用这种改进的方法

可以将LED显示图像的非均匀度由采用基于CCD的校正技术校正后的8.9%降低到0.97%。

Abstract

In order to resolve the problem that LED display panel may appear position distortion and cause the high nonuniformity of LED display images

an improved method called distortion correction was proposed on the basis of an existing correction technique namely the correction technique based on CCD.The correction technique based on CCD was introduced

then the reason that this technique needs to be improved was expounded. By taking a LED display panel which is spliced by modules for the example

the distortion correction model was constructed. This model modifies the gray value of every LED display panels pixel to reduce the nonuniformity according to the nonlinear relationship between distortion and ideal module position

Furthermore

realization steps were described in accordance with the constructed model. Finally

the improved method was implemented in a LED display panel with a resolution of 128 pixel128 pixel

pixel center spacing in module of 7.62 mm

and the module containing only one pixel. Experimental results show that this method is able to reduce the nonuniformity of LED display images from 8.9% obtained by the correction technique based on CCD to 0.97%.

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Keywords

references

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Related Institution

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School of Optics and Electronics, Beijing Institute of Technology

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