Patent ID: 8890900
Filing Date: 2014-11-18
Classification: G09G

Abstract:
1. A liquid crystal display comprising: a display panel; a backlight unit configured to provide a backlight to the display panel; a first representative value calculating unit configured to calculate a representative value of each block based on an input image of a current frame divided in conformity with each block; a second representative value calculating unit configured to calculate an entire representative value of the input image of the current frame; a first representative value adjusting unit configured to adjust a representative value of a specific block of the current frame to an estimate value determined depending on a difference between the representative value of the specific block and the entire representative value; a second representative value adjusting unit configured to determine a weight value depending on a grayscale band of the specific block, wherein the grayscale band appears in the block when the number of data with white gray level in the specific block is greater than a predetermined reference value; an adding unit configured to add the weight value of the specific block to the representative value of the specific block and output a modified representative value of the specific block; a dimming value determining unit configured to map the modified representative value of the specific block to a predetermined dimming curve and select a dimming value for controlling a backlight luminance of the specific block; and a light source driver configured to drive light sources of the backlight unit based on the dimming value of the specific block.