Patent ID: 7719632
Filing Date: 2010-05-18
Classification: G02B,G02F

Abstract:
1. A liquid crystal display device comprising: a liquid crystal display panel; and a backlight which is arranged on a back surface of the liquid crystal display panel, wherein the backlight includes a light guide plate, a light source arranged on a side wall surface of the light guide plate, and a first asymmetrical prism sheet and a second asymmetrical prism sheet arranged between the light guide plate and the liquid crystal display panel, a reflection surface having inclination of 2° or less for guiding light emitted from the light source to a liquid-crystal-display-panel side is formed on a back surface of the light guide plate, and the first asymmetrical prism sheet and the second asymmetrical prism sheet are respectively formed such that each prism sheet includes projecting portions which extend along a direction of a side of the light guide plate on which the light source is arranged, and are arranged parallel to each other in a direction which intersects the direction.