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. 23, 2003
Filed:
Apr. 25, 2001
Shunji Miyakawa, Tokyo-To, JP;
Tomio Tanaka, Tokyo-To, JP;
Abstract
Disclosed are a color filter, which can prevent, on a higher level, a liquid crystal layer from being contaminated with ionic materials, and a liquid crystal display device having improved display quality. The color filter comprises at least a substrate and a colored layer of a plurality of colors provided in a predetermined pattern on the substrate, and, after impurity elution, permits a liquid crystal to have a voltage holding ratio of not less than 90%. The liquid crystal display device comprises: this color filter; and a counter electrode substrate provided so as to face the color filter while leaving a gap between the color filter and the counter electrode substrate through a seal member; and a liquid crystal layer sealed into the gap.