动态调光算法包括背光值和液晶像素补偿量确定.通过查表法实现的基于图像分类的S曲线调光算法电路存在资源消耗大、处理速度慢等缺陷.本文提出了2种算法实现方式:等差数列法、最小二乘拟合法,并分别对这2种算法进行了仿真分析,得到其与查找法的最大标准差分别为1.8和0.8.在开发的全局调光液晶电视样机上进行了实际测试,和查表法得到的像素亮度相比:等差数列法的误差为3个灰度级,最小二乘法的误差在1个灰度级以内.2种算法都可使电路存储资源的利用率由原查表法的71％降低到4％.仿真和实验结果表明最小二乘法具有更好的效果.
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