基于视频内容的动态液晶背光控制节电系统  

Dynamic LCD Backlight Control Energy Saving System Based on Video Content

作　　者：沈家庆[1] 

机构地区：[1]中国民航飞行学院航空工程学院,广汉618307

出　　处：《现代计算机》2010年第5期167-170,共4页Modern Computer

摘　　要：液晶面板的光透射率极低,要产生电视需要的显示亮度就需要背光提供足够的光强,背光系统需要消耗较多的电能。采用FPGA图像处理技术,通过逐帧分析视频信号内容,动态地调整液晶背光的亮度并补偿信号的强度,在液晶电视画质基本保持不变的情况下最大限度地节省电能,处理算法主要基于图像的灰度统计信息,然后根据大量测试的液晶面板数据找到合适的背光控制参数和图像增益系数。通过实际测试,给出了实验波形,效果显著。LCD TV panels of light transmittance is very low, to produce TV backlight brightness the display needed will need to provide adequate light intensity, and backlight system needs to consume more power. Using FPGA image processing technology, through frame by frame analysis of video signal content, dynamically adjusts the LCD backlight brightness and compensates for sig nal strength. Processing algorithm is mainly based on gray-scale image statistical information, and according to extensive testing of the LCD backlight panel data, finds a suitable control parameters and image gain coefficient. Through the actual test, gives the schematic of the main part of the system, it features with good effect.

关 键 词：液晶面板 逐帧 灰度 增益 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]