Backlight for liquid crystal devices

Details Backlight for liquid crystal devices Backlight for liquid crystal devices

1992-03-11

1993-05-18

Cole, Richard R.

Illumination

Illuminated scale or dial

Edge illuminated modifier or light rod/pipe

362 31, 362 23, 362253, 362 62, F21V 904, F21Y 800

Patent

active

052114635

ABSTRACT:
A backlight system for liquid crystal device display is equipped with a dual lighting system for day viewing and compatible with night vision systems. The day lighting system uses conventional fluorescent or incandescent lamps for full color display during daytime use. The night lighting system uses a light source which is either filtered to remove infrared and near infrared wavelengths or which is chosen from a class of sources which does not emit such wavelengths. The day lighting system is disabled while the night system is in use.

REFERENCES:
patent: 4277817 (1981-07-01), Hear
patent: 4934783 (1990-06-01), Klein
patent: 4998804 (1991-03-01), Horiuchi
patent: 5143433 (1992-09-01), Farrell
patent: 5146354 (1992-09-01), Plesinger

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