Light guide for LCD

Details Light guide for LCD Light guide for LCD

1988-11-02

1990-05-29

Heyman, John S.

Illumination

Supported by vehicle structure

Condition responsive

362 31, 362297, G02F 113

Patent

active

049290622

ABSTRACT:
A display system includes a liquid crystal display, a light guide behind the display, and light emitting diodes. The light guide is a molded slab of clear material with a front display surface a rear surface and six bordering surfaces with two planes depressed into its rear surface and having two hollow half cylindrical extensions integrally molded with closed top and bottom ends. The rear surface and bordering surfaces and outer surface of the extensions are coated with reflective white paint. These extensions receive light from surface mounted LED's which are positioned directly below the extensions to redirect the light into the light guide.

REFERENCES:
patent: 4118111 (1978-10-01), Laesser
patent: 4258643 (1981-03-01), Ishikawa et al.
patent: 4282560 (1981-08-01), Kringel et al.
patent: 4630895 (1986-12-01), Abdala, Jr. et al.
patent: 4714983 (1987-12-01), Lang
patent: 4755035 (1988-07-01), Kopish et al.
patent: 4770499 (1988-09-01), Kobayashi et al.

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