Touch sensor input system for a computer display
US5694154A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1995 |
| Grant date | Dec 2, 1997 |
| Priority date | — |
| Expiry date | Aug 10, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0442
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A conductive coating on the front surface of the display screen is used to determine the position of an object, such as a user's finger, touching the screen. Sensors at the edge of the conductive coating detect changes in the level of the ambient field pickup when the user's finger touches the display screen. The conductive coating may optionally be divided into blocks with separate connections to each block, or may have a resistivity profile so as to allow full X and Y co-ordinate determination of the position of the finger. Also, optionally, a stylus generating an electromagnetic field when in contact with the display may be used in place of the finger.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.