Back light unit in liquid crystal display

Details Back light unit in liquid crystal display Back light unit in liquid crystal display

2005-04-12

2005-04-12

Chowdhury, Tarifur R. (Department: 2871)

Liquid crystal cells, elements and systems

Particular structure

Particular illumination

C362S035000, C362S026000, C362S330000, C349S062000

Reexamination Certificate

active

06879355

ABSTRACT:
In a black light unit, a light-guide plate is provided with a cone pattern to uniformly guide a light beam passing through a light input. A light-path converter controls a progress direction of the light beam in such a manner that the light beam outputted from the light-guide plate is progressed in a direction perpendicular to a liquid crystal panel. A diffusion sheet diffuses the light beam passing through the light-path converter into the liquid crystal panel. A reflection of the light-guide pattern and wall surface and the bright lines of the light input can be minimized. The light efficiency can be improved and the manufacturing cost can be reduced.

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patent: 97-62759 (1997-09-01), None

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