Display apparatus having quarter-wave plate positioned to elimin

Details Display apparatus having quarter-wave plate positioned to elimin Display apparatus having quarter-wave plate positioned to elimin

1997-08-06

1999-10-26

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

349 11, 345 7, 345 8, G02F 11335, G02G 500

Patent

active

059737603

ABSTRACT:
A display apparatus adapted for viewing by a person wearing linearly polarized lenses, such as sunglasses, is disclosed. The display apparatus includes a display device, such as an LCD or a filtered TFEL display, which displays information by providing as an output linearly polarized light travelling toward the person viewing the display apparatus. A quarter-wave plate is positioned between the display device and the linearly polarized lenses of the sunglasses. The quarter-wave plate receives the linearly polarized light from the display device as an input and provides as an output circularly polarized light which passes through the linearly polarized lenses of the sunglasses substantially without attenuation.

REFERENCES:
patent: 3876287 (1975-04-01), Sprokel
patent: 4088400 (1978-05-01), Assouline et al.
patent: 5066108 (1991-11-01), McDonald
patent: 5576854 (1996-11-01), Schmidt et al.
patent: 5686975 (1997-11-01), Lipton

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