Liquid crystal display having light indicia on a dark background

Details Liquid crystal display having light indicia on a dark background Liquid crystal display having light indicia on a dark background

Filed on

1978-02-15

Date issued

1980-02-12

Examiner

Bauer, Edward S.

Other Related Categories

G02F 113

Type

Patent

Status

active

Patent number

041880943

Description

ABSTRACT:
A liquid crystal display of the twisted-nematic type in which light numerals or other indicia appear on a darker background. This is achieved with the use of three polarizers, one of which covers only the transparent conductive electrode regions in the display forming a desired image.

REFERENCES:
patent: 3712047 (1973-01-01), Girard
patent: 3814501 (1974-06-01), Schindler
patent: 3857627 (1974-12-01), Harsch
patent: 4025164 (1977-05-01), Doriguzzi et al.
patent: 4068926 (1978-01-01), Nakamura et al.
patent: 4139271 (1979-02-01), Yoda

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