Resistance-film type touch panel for use in a liquid crystal display device and liquid crystal display device equipped with the same
US6549195B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2000 |
| Grant date | Apr 15, 2003 |
| Priority date | — |
| Expiry date | Feb 24, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13338
- WIPO fieldOptics
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.