TFT-LCD在低背光状态下的图像增强算法  

Image Luminance and Contrast Enhancement Algorithm for Low Backlight Color TFT-LCD

作　　者：韩峰[1] 魏廷存[1] 高德远[1] 

机构地区：[1]西北工业大学计算机学院,陕西西安710072

出　　处：《液晶与显示》2009年第5期723-728,共6页Chinese Journal of Liquid Crystals and Displays

基　　金：陕西省2007年重大科技创新项目(No.2007ZKC02-01)

摘　　要：在普通的手持显示设备中,降低背光亮度可以减小系统功耗,然而同时会导致显示图像的亮度和对比度下降,影响显示画质。通过分析TFT-LCD和HVS(Human Visual System)的特征,提出了一种在低背光状态下的图像增强算法,可以在较低背光亮度下通过补偿图像的亮度和对比度来增强图像的显示效果。所提出的算法可以根据图像的具体内容选择不同的补偿方式,与同类算法相比,补偿后的亮度值更高。实验结果表明,所提出的算法可以提高图像亮度,改善图像显示效果,从而能更有效地降低系统功耗。For a typical portable handset, substantial energy savings can be achieved by dimming backlight intensity levels, but it also decreases the contrast and brightness of the displayed image. This paper analyzes the characteristics of TFT-LCD and Human Visual System （HVS）, and then presents a dynamic dimming backlight algorithm to reduce power consumption while complementing image luminance and contrast to maintain the image quality. The algorithm proposed can choose backlight complementary method according to the contents of images, so it can achieve higher luminance than traditional methods. The experimental results indicate that the power dissipation of backlight can be significantly reduced while the desired image quality is maintained.

关 键 词：TFT-LCD 背光亮度 图像亮度补偿 对比度 

分 类 号：TN321.5[电子电信—物理电子学] TN911.73