Back light illuminator for liquid crystal display apparatus

Details Back light illuminator for liquid crystal display apparatus Back light illuminator for liquid crystal display apparatus

1997-04-03

1999-11-16

Font, Frank G.

Liquid crystal cells, elements and systems

Particular structure

Particular illumination

349 61, 349 67, 362 31, 362 32, 362 801, 362 84, G02F 11335, F21V 704, F21V 916, B60Q 126

Patent

active

059867272

ABSTRACT:
A back light illuminator for liquid crystal display apparatus comprises a fluorescent lamp, a light guide member, and a reflection plate enclosing the fluorescent lamp and an incident portion of the light guide member so as to reflect light rays toward the incident portion of the light guide member. The reflection plate has at least a curved portion having a parabolic cross-section or a elliptical cross-section so as not to reflect the light rays in a direction to the fluorescent lamp. Thus, absorption of reflected light by the fluorophor of the fluorescent lamp is minimized, and the luminance of the back light illuminator is increased.

REFERENCES:
patent: 5211467 (1993-05-01), Seder
patent: 5634708 (1997-06-01), Koie et al.

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