为了解决液晶显示器在不同亮度下产生色温偏移的现象，详细分析了显示器白平衡调整的各零部件。从各个零部件可实现程度以及难易度出发，根据白平衡调整原理，得出采用一种基于FPGA调节OGB背光源的方法，来实现白平衡动态调整。以颜色传感器为基础，以FPGA为控制器，进行了总体方案设计和软件设计。对实验数据进行了曲线拟合和分析。做了高低温、振动、湿热、霉菌等实验后，通过测试数据对比分析，液晶屏白平衡表现效果较好。显示器白平衡调整后，扩大了颜色表现范围，达到液晶屏色温稳定，图像显示逼真的效果。色差范围控制在±0005之内，误差在063%左右。完全能够满足机载显示领域颜色稳定、色温的要求。

In order to solve the phenomenon of color temperature excursion for LCD at different luminance, the paper analyzes each part of adjusting white balance. First, according to the theory of adjusting white balance, the paper adopts the method of adjusting OGB backlight to realize white balance for LCD from extent of difficulty and accomplishment on each part. Then on the base of color sensor and FPGA as controller, software design and whole scheme design are presented. Finally, curve fitting and analysis are discussed.By analyzing and comparing test results, the effect of white balance will be perfect after experimentation of high and low temperature, vibration, wetness and mildew. After adjusting white balance,the range of color exhibition is enlarged and the color temperature can remain steady so that LCD can show image vividly. Besides, the range of color temperature is within ±0005,the error is about 063%. LCD can meet the demand of color stability and color temperature on avionics display.