Black matrix for liquid crystal display

Details Black matrix for liquid crystal display Black matrix for liquid crystal display

1996-02-26

1997-09-09

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

349106, G02F 11333, G02F 11335

Patent

active

056661770

ABSTRACT:
A liquid crystal display having improved contrast has been developed by providing a black matrix comprising two layers, a metallic underlayer and a top layer of resin in which particles of black pigment have been dispersed. Additionally, said resin is photosensitive so, after exposure to an image having the shape of the desired black matrix, it assumes the form of the black matrix after development. It is then used as a mask during the etching of the underlying metallic layer. The presence of the resin greatly reduces the reflectivity of the black matrix, thereby increasing the contrast level of the overall display, while the underlying metallic layer provides a solid base for it to rest on.

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"Process In Color Filters For LCDs" by M. Tani et al, pub by Toppan Printing Co, pp. 103-111.
S. Yachi et al, "An Analysis of Source-Common Coupling Effect in Large-Area TFT-LCDs" SID '91 Digest, pp. 30-33.

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