Optimized highly efficient large area modular flat panel display

Details Optimized highly efficient large area modular flat panel display Optimized highly efficient large area modular flat panel display

1998-06-16

2000-10-17

Tso, Laura K.

Illumination

Revolving

F21V 800

Patent

active

061320536

ABSTRACT:
A light guide used in flat panel liquid crystal display screens is provided. The light guide has triangular prismatic microgrooves cut within it to define a groove density that varies with distance from a light source. The microgrooves also have a groove angle that is based on two times the critical angle of the light guide, plus or minus approximately two degrees. This configuration of groove density and groove angle provides brighter back lighting compared to conventional flat panel displays with increased uniformity over the majority of the display. The maximized luminance and uniformity allows larger displays to be created out of a single light guide or multiple portions of light guides placed next to each other or in a stacked configuration.

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