基于FPGA的液晶显示屏测试用标准白场装置

发布时间：2018-08-18 21:22

【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 300K和12 500K3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,24h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 LCD manufacturers for standard white field, a standard white field device for color calibration on the spot was developed. This paper introduces the working principle of the standard white field device and its two working modes: standard calibration and user output. The main hardware of standard white field equipment, such as FPGA main control module, display module, man-machine interface module, probe module and so on, are described in detail. The software design of standard white field device is illustrated by examples of internal display module state machine, mechanical keystroke de-shake and LCM controller. The standard white field equipment was tested and its performance was tested. The experimental results show that this standard white field device can output standard white field of 6 500m 9300K and 12 500K3 color temperature, and has the functions of not dependent on standard light source, color temperature can be reconciled with data storage and so on. The calibrated standard white field device can generate a standard white field with adjustable color temperature and the luminance error within 24 hours is less than 0.5. It basically meets the requirements of LCD manufacturers for stable and reliable operation, simple operation and high precision of the standard white field device.
【作者单位】：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;
【基金】：国家自然基金资助项目(No.40974110)
【分类号】：TN873.93

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