LCD lightguide

Details LCD lightguide LCD lightguide

1985-06-06

1986-12-23

Hix, L. T.

Illumination

Supported by vehicle structure

Condition responsive

362 31, 362104, 362297, G02F 113

Patent

active

046308954

ABSTRACT:
A backlighted display system includes a liquid crystal display, a flat light guide behind the display, and light emitting diodes (LED's). The light guide is a molded slab of clear polycarbonate material with two planes depressed into its rear surface. Four segmented bordering surfaces are approximately arcuate in shape. The depressed planes, the segmented bordering surfaces, and the rear surface are coated with a reflective white paint. LED holders are integrally molded with the light guide. A central portion of the front surface is optionally textured. The display system provides thin construction with even light distribution across the width of the display, low power consumption, and good outdoor visibility at dusk or dawn.

REFERENCES:
patent: 2131471 (1938-09-01), Carter
patent: 2341658 (1944-02-01), Salani
patent: 2712593 (1955-07-01), Merchant
patent: 2965749 (1960-12-01), Hudson
patent: 3561145 (1971-02-01), Shotwell
patent: 3740540 (1973-06-01), Takeichi et al.
patent: 4059916 (1977-11-01), Tachihara et al.
patent: 4258643 (1981-03-01), Ishikawa et al.
patent: 4277817 (1981-07-01), Hehr
patent: 4486077 (1984-12-01), Torresdal

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