High speed, high ambient viewability liquid crystal display asse

Details High speed, high ambient viewability liquid crystal display asse High speed, high ambient viewability liquid crystal display asse

1994-02-23

1996-07-02

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 65, 359 63, G02F 11335

Patent

active

055328520

ABSTRACT:
A liquid crystal display assembly includes an untwisted nematic liquid crystal cell structure. The light transmittance of each pixel element of the assembly is a function of the pixel drive voltage. A phase compensating plate reduces the voltage necessary to permit switching, permitting compatibility with conventional thin film transistor (TFT) arrays but capable of greatly shortened response times. The configuration includes a combination linear polarizer and quarter wave plate which functions as a circular polarizer for blocking reflections from internal specularly reflecting surfaces within the liquid crystal display, thereby enhancing high ambient viewability.

REFERENCES:
patent: 4492432 (1985-01-01), Kaufmann et al.
patent: 4657348 (1987-04-01), Ziegler
patent: 4701028 (1987-10-01), Clerc et al.
patent: 4770500 (1988-09-01), Kalmanash
patent: 4813770 (1989-03-01), Clerc et al.
patent: 4889412 (1989-12-01), Clerc et al.
patent: 5107356 (1992-04-01), Castleberry
patent: 5325218 (1994-06-01), Willet et al.

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