基于LCD-FED双屏结构的高动态范围显示系统  

A high dynamic range display system based on the dual-structure of the LCD-FED

作　　者：郭碧辉[1] 姚剑敏[1] 郭太良[1] 王宗贤[1] 

机构地区：[1]福州大学物理与信息工程学院,福建福州350002

出　　处：《光电子．激光》2013年第2期258-264,共7页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金(61101169);福建省自然科学基金(2010J01333;2011J01347);福建省教育厅重点(JA09003;JA10033;JA11013)资助项目

摘　　要：针对采用投影仪、发光二极管(LED)阵列等双屏结构的高动态范围(HDR)显示系统存在体积庞大、局部对比度低等缺点,提出以场致发射显示器(FED)作为液晶显示器(LCD)的背光源。描述了FED背光的结构,提出前后面板点对点的控制,对HDR图像进行前后面板的分割。讨论了FED背光的光晕与运动伪像问题,并通过实验测试了系统的光晕与运动伪像。研究结果表明,本文提出的方法具有提高HDR LCD的局部对比度与减淡光晕和运动伪像的优点,FED背光的结构局部对比度提高到216∶1,具有较高的实用价值。High dynamic range （HDR） display can present images that are visually indistinguishable from the real setting they portray. The system of high dynamic range display based on the dual-structure of the projector or LED array has many shortcomings, such as huge volume and low local contrast. So this paper presents a backlight source of liquid crystal display （LCD） based on field emission display （FED）. The field emission backlight structure is described, the point-by-point control mechanism of front and back panels is proposed,and the high dynamic image in the systems of two panels is divided. We discuss the backlight displays of the FED with the problems of halo, according to the problems of motion artifact about LCD and FED devices the problems of motion artifacts of HDR display system based on the dual- structure of LCD-FED are analyzed and the motion artifact and halo are measured by experiment. The display device of FED backlight is fabricatedThe method in this paper has the advantages of raising local contrast and dodging the halo and motion artifacts of high dynamic range LCD. The experimental results demonstrate that the field emission backlight structure can increase the LCD local contrast to 216 ： 1, and it has higher practical value for displayer.

关 键 词：高动态范围(HDR) 对比度 光晕 运动伪像 场致发射显示器(FED) 

分 类 号：TN27[电子电信—物理电子学]