METHOD AND APPARATUS FOR CONTROLLING THE BRIGHTNESS OF AN LCD BACKLIGHT

摘要

The brightness of a LCD backlight, comprising a plurality of LEDs or LED chains (221_1 to 221_n), is controlled by a processor (203) for calculating the number of LEDs of a plurality of LEDs to be illuminated for a determined brightness and selecting the calculated number of LEDs or LED chains to form a spatial distribution pattern; and drivers (219_1 to 219_n) for illuminating the calculated number of LEDs in a random or pseudo-random sequence.