Tactile screen for determining the coordinates of a point on a surface
US4720607A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 16, 1987 |
| Grant date | Jan 19, 1988 |
| Priority date | — |
| Expiry date | Jan 16, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/045
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A tactile screen for determining the coordinates of a point on a surface is formed by a support of glass, for example, which carries relatively spaced conductive strips made up of emitting and receiving strips in interjacent relation. The screen is intended to be touched by an object such as a user's finger in order to establish an electrical bridge between an emitting strip and a receiving strip. The conductive strips are converted with a membrane for providing the conductive strips with mechanical and electrical protection, the surface of the membrane which is adjacent to the conductive strips being conductive. The electrical resistance per unit area of the conductive surface is distinctly higher than that of the conductive strips when the membrane is not touched.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.