Patent ID: 6469453
Filing Date: 2002-10-22
Classification: H05B,Y02B

Abstract:
A backlight for a liquid crystal display comprising:a plurality of light emitting units to be turned on and off based on pulse signals of a predetermined cycle including an on-period and an off-period; and a phase controller for controlling a phase of each of the pulse signals; wherein the on-periods of the respective pulse signals are phase shifted to each other, and the light emitting units are operated in at least three modes including a high brightness mode, a standard brightness mode and a low brightness mode, the on-period of the respective pulse signals overlapping each other in the high brightness mode, the on-period of the pulse signal for each light emitting unit coinciding with the off-period of the pulse signal for another light emitting unit in the standard brightness mode, the on-periods of the respective pulse signals being prevented from overlapping each other in the low brightness mode.