LCOS激光投影显示亮度均匀性和色度均匀性的测量及校正系统

摘要

To improve the brightness uniformity and color uniformity of the laser projection, a way is used as a large compression ratio to the largest and the smallest gray level pixels, and the best to improve middle gray value. In order to achieve correct the brightness uniformity and color uniformity, building a laster projector display, camera and computer system, a closed-loop corresponds to the methodology is constituted. The experiments and analysis show that the whole screen's brightness uniformity and color uniformity of the projector display are improved by this way. Especially, the poor uniformity of the screen corner area gains are significantly improved.%为了提高激光投影显示画面的亮度均匀度和色度均匀度,提出了一种对灰度值很大和很小的像素点采用大压缩率,并尽可能多地提高中等灰度值的方法.搭建一个由投影显示、相机和计算机构成的闭环系统对应于此种方法,以达到亮度均匀度和色度均匀度矫正的目的.实验和分析表明,通过该系统,投影显示的整个屏幕的亮度均匀性和色度均匀性得到了很大提高,尤其对于均匀性差的屏幕边角区域,更得到显著地改善.