Backlight Control Method for Liquid Crystal Panel and Related Liquid Crystal Display

A liquid crystal display (LCD) capable of enhancing image quality, the LCD device comprising:

• a liquid crystal panel;
• a backlight module, set on the liquid crystal panel, for dividing the liquid crystal panel into a plurality of backlight areas to individually provide backlights for each backlight area of the plurality of backlight areas, each backlight area of the plurality of backlight areas further comprising a plurality of pixels;
• a buffering memory, coupled to the liquid crystal panel, for temporarily storing grayscale values of all pixels in each backlight area of the plurality of backlight areas;
• and
• a backlight control module, coupled to the backlight module and the buffering memory, for configuring an expanding area and a weighted area for each backlight area of the plurality of backlight areas to determine the backlight intensity of each backlight area according to a weighted average grayscale value calculated with all pixels inside the expanding area and the weighted area;
• wherein the expanding area is formed by expanding outwardly from each backlight area, and the weighted area is focused on the center of each backlight area and has a range not greater than the expanding area.