公开(公告)号：US20120007896A1

公开(公告)日：2012-01-12

申请号：US13178006

申请日：2011-07-07

申请人： Kyung-Joon Kwon ,  Dong-Woo Kim ,  Kee-Won Ahn ,  Jung-Hwan Lee

发明人： Kyung-Joon Kwon ,  Dong-Woo Kim ,  Kee-Won Ahn ,  Jung-Hwan Lee

IPC分类号： G09G5/10 ,  G09G3/36

CPC分类号： G09G3/3426 ,  G09G2320/0646

摘要： A liquid crystal display device capable of improving a contrast ratio and of reducing a halo phenomenon with low power consumption and a method for local dimming driving the same are disclosed. A method for local dimming driving a liquid crystal display includes determining a local dimming value for each of light-emitting blocks based on analyzing input image data by the unit of light-emitting block provided in a backlight unit; determining a halo degree by analyzing a total light quantity of black pixels having black gradations in the input image data; adjusting the number of spatial filtering repetitions based on the determined halo degree; compensating the local dimming value by performing spatial filtering for the local dimming value an adjusted number of times; and controlling brightness of the backlight unit for each of the blocks by using the compensated local dimming value.

摘要翻译： 公开了能够提高对比度和降低功耗低的光晕现象的液晶显示装置及其局部调光方法。 驱动液晶显示器的局部调光方法包括：基于设置在背光单元中的发光块单元分析输入图像数据，确定每个发光块的局部调光值; 通过分析输入图像数据中具有黑色渐变的黑色像素的总光量来确定光晕度; 基于确定的光晕度来调整空间滤波重复的数量; 通过对局部调光值进行调整次数的空间滤波来补偿局部调光值; 以及通过使用补偿的局部调光值来控制每个块的背光单元的亮度。