基于显示屏控制技术与校正原理,提出了一种改善LED显示屏亮度均匀性的算法。 通过CCD相机采集显示屏RGB图像,用数学形态学和模板匹配法确定灯点的位置并根据发光区 域的灰度值计算其相对亮度,生成每个灯点的校正参数,用脉冲宽度调制控制灯点的亮度。 实验结果表明提出的算法能有效改善显示屏的亮度均匀性,提高显示屏的显示质量并延长其使用寿命。

An algorithm to improve the brightness uniformity of LED display screen is proposed based on display screen control technology and correction principle. The charge-coupled device (CCD) camera is used to collect the RGB images of display screen. The position of LED light is determined by using mathematical morphology and template matching method. The relative brightness of light emitting region is calculated according to grayscale value of light emitting region. The correction parameters of each light point are generated and pulse width modulation is used to control brightness of light points. Experimental results show that the proposed algorithm can effectively improve the brightness uniformity on LED display screen, and its display quality and prolong its service life.