The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 09, 1997
Filed:
Feb. 26, 1996
Ting-Chiang Hsieh, Hsinchu, TW;
Dong-Yuan Goang, Tao-Yuan, TW;
Industrial Technology Research Institute, Hsinchu, TW;
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.