Light pipe reflector for use in liquid crystal or other display

Details Light pipe reflector for use in liquid crystal or other display Light pipe reflector for use in liquid crystal or other display

1975-03-31

1976-11-30

Bauer, Edward S.

Buckles, buttons, clasps, etc.

240 1EL, 350 96R, G02F 113

Patent

active

039945642

ABSTRACT:
The invention disclosed pertains to liquid crystal and other optical displays useable both with ambient light and with built-in illumination sources. A light pipe formed of optically clear material has a clear, lightly etched top surface, and a patterned bottom surface (preferably having closely spaced minute convex protrusions). An enlarged portion at one edge contains a cavity for the insertion of a light bulb. The light pipe is covered with a highly reflective coating except for said clear top surface and the interior portion of said cavity.

REFERENCES:
patent: 2561885 (1951-07-01), Prideaux et al.
patent: 3023304 (1962-02-01), Peterson
patent: 3752974 (1973-08-01), Baker et al.
patent: 3840695 (1975-10-01), Fischer
patent: 3864905 (1975-02-01), Richardson
patent: 3881809 (1975-05-01), Fergason et al.

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