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:
Apr. 15, 2003
Filed:
Dec. 06, 2000
Toshihiko Hikida, Settsu, JP;
Sadao Fujii, Kobe, JP;
Kaneka Corporation, Osaka, JP;
Abstract
The touch panel for use in a liquid crystal display device has a rigid electrode plate composed of a rigid transparent substrate provided with a transparent conductive layer on its upper surface, and a flexible electrode plate composed of a transparent and flexible substrate provided with a transparent conductive layer on its lower surface. On the upper surface of the flexible electrode plate, a polarizer plate is fixed. The flexible transparent substrate includes a transparent film of a transparent amorphous plastic material having a glass transition temperature of 100° C. or higher, and the transparent film has a relative optical elasticity coefficient Cr value of 0.2 to 0.8 defined by the formula: Cr=C/Cpc where C represents an optical elasticity coefficient of the transparent film and Cpc represents an optical elasticity coefficient of a polycarbonate film derived from bisphenol A.