Patent ID: 8104945
Filing Date: 2012-01-31
Classification: G02B,G02F

Abstract:
1. A backlight unit for a liquid crystal display (LCD) device, disposed under a liquid crystal panel to illuminate the liquid crystal panel, the backlight unit comprising: a light guide plate; first and second light emitting diode (LED) arrays disposed on adjacent sides, perpendicular to each other, of the light guide plate, each of the arrays having at least one of LED blocks, each of which consists of one or more LEDs; and a control unit that controls electric signals, respectively inputted to the LED blocks, to regulate luminance for the respective LED blocks, wherein light emitted from the first and second LED arrays overlaps in the light guide plate, and wherein the control unit controls an electric signal to regulate a luminance of a first LED block of the LED blocks independently of an electric signal to regulate a luminance of a second LED block of the LED blocks.