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Invention Grant
US07834954B2 Backlight module having a first diffuser with a haze ratio which gradually increases along two directions extending to a central region of the first diffuser and a second diffuser with a haze ratio gradually decreasing away from the light source and liquid crystal display having the same 有权
背光模块具有第一扩散器，其雾度比沿着延伸到第一扩散器的中心区域的两个方向逐渐增加，第二扩散器具有从光源逐渐减小的雾度比和具有该光源的液晶显示器的第二扩散器

Backlight module having a first diffuser with a haze ratio which gradually increases along two directions extending to a central region of the first diffuser and a second diffuser with a haze ratio gradually decreasing away from the light source and liquid crystal display having the same
Abstract:
A liquid crystal display (2) includes a liquid crystal panel (29); a backlight module (20) providing light beams to the liquid crystal panel. The backlight module includes a light guide plate (23) having at least one light incident surface (231), and a light emitting surface (232) adjoining the at least one light incident surface; at least one light source (21) disposed adjacent to the at least one light incident surface; a prism sheet (25) disposed at the light emitting surface for converging light beams; and a first diffuser (26) disposed at the prism sheet for scattering the light beams therethrough. A haze ratio of the first diffuser changes according to the brightness differentia over a brightness distribution of the prism sheet for attaining a substantially uniform surface light beams output.
Abstract(Chinese):

液晶显示器（2）包括液晶面板（29）; 向液晶面板提供光束的背光模块（20）。 背光模块包括具有至少一个光入射表面（231）的导光板（23）和与所述至少一个光入射表面邻接的发光表面（232）; 设置在所述至少一个光入射表面附近的至少一个光源（21）; 设置在发光面的棱镜片（25），用于会聚光束; 以及设置在所述棱镜片处的用于将光束散射通过的第一扩散器（26）。 第一扩散器的雾度比根据用于获得基本均匀的表面光束输出的棱镜片的亮度分布的亮度差异而改变。

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