1981-10-02
1984-03-13
Davie, James W.
350357, G02F 117
Patent
active
044363788
ABSTRACT:
A passive display module for use in a display system having a source of illumination and a projection lens includes a liquid filled cell having a transparent top and a wall surrounding a display electrode area. A side light guide, coextensive with the display area, forms or abuts one wall of the cell and directs light from the source onto the display area. The guide has a reflective upper inclined surface for reflecting light onto the display area and for preventing light from the source from escaping directly to the projection lens. A reflective coating is also provided on an outer face of the remaining portion of the cell wall which is inclined inwardly to return escaping light to the system.
REFERENCES:
patent: T938006 (1974-10-01), Stephany
patent: 4195915 (1980-04-01), Lichty et al.
patent: 4212048 (1980-07-01), Castleberry
patent: 4277817 (1981-07-01), Hehr
Report AD-A048198/6SL Aug. 1977 for U.S. Government "Liquid Crystal Airborne Display" by Winner et al (Hughes Aircraft).
IBM Technical Disclosure Bulletin, vol. 22, No. 11, Apr. 1980 p. 5062.
Davie James W.
International Business Machines - Corporation
Kieninger Joseph E.
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