Patent ID: 9176274
Filing Date: 2015-11-03
Classification: G02B,G02F,G09G

Abstract:
1. A backlight unit for a liquid crystal display disposed below a liquid crystal panel to irradiate light thereto, comprising: a plurality of separate light guide plates defining respective blocks; and groups of light emitting diodes each disposed along an edge of each of the light guide plates, each group of the light emitting diodes emitting light toward a corresponding one of the light guide plates; wherein the each light emitting diode group is turned on and off according to the corresponding block, wherein the liquid crystal panel has a plurality of divided areas, and the light emitting diodes have brightness adjusted according to the blocks, by a peak value of a grey level in each of the divided areas, and wherein the light emitting diode groups are time-synchronized with the liquid crystal panel and turned on sequentially.