Color filter for a liquid crystal display

Details Color filter for a liquid crystal display Color filter for a liquid crystal display

1996-09-09

1997-12-09

Tucker, Philip

Compositions

Light transmission modifying compositions

349106, F21V 900, G02F 11335

Patent

active

056956908

ABSTRACT:
A color filter for a liquid crystal display is made by depositing a layer (22) of colored dye in a pattern on a transparent substrate (20). The pattern is in pixel format, covering most of the substrate surface and leaving portions (23) of the surface between the pixels uncovered. A layer of silver halide (25) covers both the colored dye pixels and the exposed portions of the substrate surface. The silver halide layer is treated by exposing it to light so that those portions of the silver halide layer that lie directly over the colored dye pattern become transparent and those portions of the silver halide layer that lie between the pixels become black, blocking any transmitted light.

REFERENCES:
patent: 4808501 (1989-02-01), Chiulli
patent: 4957349 (1990-09-01), Clerc et al.
patent: 5444557 (1995-08-01), Spitzer et al.
patent: 5571663 (1996-11-01), Hirai
patent: 5626994 (1997-05-01), Takayanagi et al.

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