飞机中液晶显示屏上显示的一般是图形和数据,显示界面上有较大范围是暗场景.若采用传统液晶显示器恒定亮度的面光源,会造成不必要的电能消耗,且存在漏光现象导致图像的对比度下降,因此对液晶显示的背光源采用动态背光的控制.文章通过分析常见的平均值和最大值背光亮度提取方法,提出基于灰阶熵的LCD背光亮度调整方法.该方法既解决平均值法失真严重的问题,保证图像质量,同时相比于最大值法又减少功耗,达到降低功耗和保证图像质量的要求.
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