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:
Dec. 05, 2000
Filed:
Feb. 13, 1998
Tieer Gu, Troy, MI (US);
OIS Optical Imaging Systems, Inc., Northville, MI (US);
Abstract
A liquid crystal display (LCD) includes a multilayer black matrix system for improving the contrast of displayed images. The black matrix system includes at least one layer of a material that has variable amounts of chemical elements. By, for example, varying 'x' and 'y' in SiO.sub.x N.sub.y, the refractive index 'n' of adjacent SiO.sub.x N.sub.y layers can be slowly varied through the thickness of the system so that the refractive index adjacent the substrate substantially matches that of the substrate and so that there are no overly large refractive index differences between adjacent layers in the system. This reduces light reflections off of the black matrix system.