彩色等离子体显示器动态低灰度级增强技术  

Enhancement of Dynamic Low Gray Levels in Color Plasma Display Panel

作　　者：魏巍[1] 孙鉴[1] 

机构地区：[1]西安交通大学电子物理与器件研究所,西安710049

出　　处：《西安交通大学学报》2005年第12期1366-1369,共4页Journal of Xi'an Jiaotong University

摘　　要：开发了一种利用反γ修正子场编码增强彩色等离子体显示器(PDP)动态低灰度级图像的技术.该技术基于灰度平均分配算法,通过输入灰度级的非均匀分配、低灰度级单独分配、反γ曲线低灰度级部分指数项的修正等3项改进技术对反γ修正子场编码进行校正,有效地增加了显示的动态低灰度级数目,在保证整幅图像显示效果的同时增强了彩色PDP对低灰度级图像的显示能力.该技术还可根据输入图像的灰度分布特点动态指定所要增强的灰度级范围,增强了算法的灵活性.仿真结果表明,当输入图像为0～255级灰度时,采用新技术可使输出灰度级在0～60的图像单元占全部图像单元的最高比率达到26.8%,是单纯使用反γ修正技术时的6.2倍.The technology that enhances the dynamic low gray levels by the inverse-gamma relation subfields code was developed in color plasma display panel （PDP）. Based on the grayscales average distribution method, the inverse-gamma modified subfields code was corrected through 3 improved methods, namely, input grayscales uneven distribution, distributing low gray levels alone, and modifying the exponent of inverse-gamma function. Thus, the number of displayed dynamic low gray level is increased effectively. The displaying effect of the whole image is guaranteed while enhancing the display ability of color PDP for low gray level images. The enhanced grayscale range required can be dynamically specified according to the distributing characteristic of the grayscales of the input image. The flexibility of the algorithm is increased. The simulation result shows that when input image is 0-255 grayscales, the image cells with grayscale below 60 to the entire image cells ratio reaches 26.8 % at most by using the new technology, and it is 6. 2 times higher than the one obtained by using only the inverse-gamma correction.

关 键 词：彩色等离子体显示器 动态低灰度级 灰度平均分配 非均匀分配 单独分配 反γ曲线指数 

分 类 号：TN873.94[电子电信—信息与通信工程] TN27