Planar light source unit and display device

Details Planar light source unit and display device Planar light source unit and display device

2006-01-31

2006-01-31

Ward, John Anthony (Department: 2875)

Illumination

Edge lighted panel

Light guide

C362S606000, C362S600000, C362S331000, C362S333000, C362S339000, C349S062000

Reexamination Certificate

active

06991358

ABSTRACT:
A light guide plate has a hologram pattern on a light exit surface. The hologram pattern anisotropically diffuses light in the direction parallel with a light incident surface of the light guide plate. On a back surface of the light guide plate are formed mirror-polished prism structures extending parallel with the light incident surface. A downward-pointing prism sheet with a given prism apex angle is placed on the light exit surface of the light guide plate. The use of the downward-pointing prism sheet together with the light guide plate having the anisotropic diffusion hologram pattern integrally formed thereon produces a liquid crystal display device with enhanced luminance properties.

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