Subtractive color LCD utilizing circular notch polarizers and in

Details Subtractive color LCD utilizing circular notch polarizers and in Subtractive color LCD utilizing circular notch polarizers and in

1994-06-07

1998-05-12

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Particular illumination

349 74, 349 80, 349 97, 349 98, G02F 11335, G02F 11347

Patent

active

057513856

ABSTRACT:
A subtractive color liquid crystal display employing circular polarizers. In the subtractive color display each picture element has three liquid crystal switching elements. Adjacent to each liquid crystal switching element are a circular polarizer and 1/4 wave retarder plate combination. The circular polarizer and 1/4 wave retarder plate combination create a linear notch polarizer for an isolated and steep polarization band for each of the primary colors (red, green blue). The notch polarizes are tuned to the particular backlight of the display in order to provide increased light transmittance and color gamut.

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IEEE Transactions on Electron Devices, Feb. 1974, vol. ED-21, No. 2, ISSN 0018-9383, "Liquid Crystal Color Light Valve" (Sato, et al.).
Patent Abstracts of Japan, vol. 17, No. 643, (P-1651), dated 29 Nov. 1993, JP5210082 (Semiconductor Energy Lab Co. Ltd.), 20 Aug. 1993.
Haberle et al., "Crosslinkable Cholesteric LC-Silicones", Record of the International Display Research Conference, pp. 57-59, 1991.

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