Lg Display Co., Ltd.

Heewon Ahn

Kyungjoon Kwon

Dongwoo Kim

Daeho Cho

Byoungchul Cho

HeeJung Hong

Changkyun Park

A method of compensating for pixel data includes extending a side portion and a corner portion of a real screen to set an virtual screen, setting dimming values of the virtual screen using dimming values of the real screen, calculating an amount of light of each of pixels on the real screen using the dimming values of the virtual screen mapped to a predetermined analysis area, and multiplying the amount of light of each pixel by a gain of each pixel to modulate pixel data.

Method of compensating for pixel data and liquid crystal display

A liquid crystal display includes a liquid crystal display panel, a backlight unit including a plurality of light sources, the backlight unit providing light to a back surface of the liquid crystal display panel, a backlight driving circuit that individually drives a plurality of previously determined blocks each including the light sources based on a dimming value of each of the blocks, and a local dimming control circuit that calculates a pixel gain value compensating for a luminance reduction resulting from the dimming value of each block and corrects the pixel gain value based on a grayscale saturation level of each block.

Liquid crystal display and local dimming control method thereof

A liquid crystal display includes a liquid crystal display panel, a backlight unit including a plurality of light sources, a backlight driving circuit that individually drives a plurality of previously determined blocks each including the light sources based on a dimming value of each of the blocks, and a local dimming control circuit. The local dimming control circuit adjusts the dimming value of each block based on the result of an analysis of input data, calculates and interpolates sampling gain values of predetermined sampling positions positioned inside each block so as to compensate for a change amount of a luminance resulting from the dimming value of each block, obtains a gain value of each pixel, and modulate the input data to be applied to a corresponding pixel based on the gain value of each pixel.

Liquid crystal display and local dimming control method thereof capable of reducing the size of an operation algorithm

Liquid crystal display and local dimming control control method thereof

Growing community of inventors

Gyeonggi-do, South Korea

Heewon Ahn