Liquid crystal cells – elements and systems – Particular structure – Particular illumination
Patent
1993-07-27
1997-08-26
Sikes, William L.
Liquid crystal cells, elements and systems
Particular structure
Particular illumination
362 27, 362 30, 349 70, G02F 11335, G01D 1128
Patent
active
056615787
ABSTRACT:
The disclosure is directed to a color liquid crystal display backlight system for daytime and nighttime use. Night vision imaging system retirements are met so that light emissions from the 630 nm to 930 nm range are substantially reduced or eliminated. Separate daytime and nighttime light sources are utilized. The NVIS compatible nighttime source is positioned to be out of sight of a user and produces an appropriately filtered, substantially collimated beam which diffusively reflects from the inside walls and base of the display housing before it illuminates the display surface. Intensities of both daytime and nighttime light sources can be controlled.
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Habing Robert D.
Losinski Armand R.
Nelson Larry A.
Wood Teddy J.
Champion Ronald E.
Honeywell Inc.
Johnson Kenneth J.
Nguyen Tiep H.
Sikes William L.
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