Coordinates input device using liquid crystal sheet
US5949501A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 1997 |
| Grant date | Sep 7, 1999 |
| Priority date | — |
| Expiry date | Feb 7, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/1334
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A coordinates input device includes: a liquid crystal sheet comprising a conductive layer, a transparent high electric resistant layer, a liquid crystal-dispersed polymer layer, and a transparent insulating layer, all of which are sequentially laminated on a board; and a tablet comprising a Y-axis coordinate resistant sheet, a pressure sensitive sheet, an electrode sheet, a pressure sensitive sheet, an X-axis coordinates resistant sheet, and a flexible film for protection, all of which are sequentially laminated on a base. The Y-axis coordinates resistant sheet and the X-axis coordinates resistant sheet are connected to a detecting circuit for detecting coordinates indicated by a coordinates indicator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.