FPGA based white field apparatus for LCD calibration

ZHAO Lei; WANG Xue-liang; GONG Yan

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FPGA based white field apparatus for LCD calibration

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- FPGA based white field apparatus for LCD calibration
- Chinese Journal of Liquid Crystals and Displays Vol. 29, Issue 1, Pages: 94-100(2014)
- 作者机构：
  
  中国科学院长春光学精密机械与物理研究所应用光学国家重点实验室,吉林长春,130022
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN949.6
- Received：22 February 2013，
  
  Revised：19 March 2013，
  
  Published：15 February 2014
- 稿件说明：
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赵磊, 王学亮, 巩岩. 基于FPGA的液晶显示屏测试用标准白场装置[J]. 液晶与显示, 2014,29(1): 94-100

ZHAO Lei, WANG Xue-liang, GONG Yan. FPGA based white field apparatus for LCD calibration[J]. , 2014,29(1): 94-100
赵磊, 王学亮, 巩岩. 基于FPGA的液晶显示屏测试用标准白场装置[J]. 液晶与显示, 2014,29(1): 94-100 DOI：

ZHAO Lei, WANG Xue-liang, GONG Yan. FPGA based white field apparatus for LCD calibration[J]. , 2014,29(1): 94-100 DOI：

摘要

针对液晶显示屏生产厂商对标准白场的需求，研制了一种用于现场色彩标定的标准白场装置。介绍了标准白场装置的工作原理，以及该装置的标准定标和用户输出2种工作模式。针对标准白场装置的FPGA主控模块、显示器模块、人机接口模块、探头模块等主要硬件进行了详细说明。以内部显示模块状态机、机械按键去抖和LCM控制器为例说明了标准白场装置的软件设计。对研制的标准白场装置进行了标准定标实验，并对其定标后的性能进行了测试。实验结果表明：该标准白场装置可输出6 500、9 300 K和12 500 K 3种色温的标准白场，具有不依赖标准光源、色温可调和数据存储等功能。标定后的标准白场装置能够生成色温可调的标准白场，24 h内输出亮度误差小于0.5%。基本满足液晶显示屏生产厂商对标准白场装置的运行稳定可靠、操作简单方便、精度高等要求。

Abstract

In order to meet the demand of standard white field of LCD production company

a white field apparatus is developed

with which the calibration of color measurement can be finished. Firstly

the principle of the standard white field

its calibration working mode and output working mode are introduced. Secondly

the FPGA main control unit

the display unit

the man-machine connecting unit

the detecting unit and other hardware units are explained in detail. Thirdly

the software system

for example the display mode controller

the key-press debouncing method and the LCM controller are designed. Finally

the calibration experiment of the apparatus is finished

and its calibrated performance is measured. Experimental results indicate that the apparatus system based on FPGA is able to produce 6 500 K

9 300 K and 12 500 K three different color temperature white fields. The white field apparatus can work without the standard light

and it has the advantage of color temperature adjusting and data storage. The white field apparatus could provide standard white fields with adjustable color temperature

the luminance error is better than 0.50% within 24 h.It can satisfy the requirements of strong stabilization

good operation and high precision.

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Keywords

references

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Related Institution

Changchun Institute of Optics， Fine Mechanics and Physics， Chinese Academy of Sciences

University of Chinese Academy of Sciences

Key Laboratory of Space-based Dynamic & Rapid Optical Imaging Technology， Chinese Academy of Sciences

School of Microelectronics， Shanghai University

Key Laboratory of Advanced Display and System Applications of Ministry of Education， Shanghai University

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