Apparatus for detecting X and Y coordinates of input points
US4319078A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 1980 |
| Grant date | Mar 9, 1982 |
| Priority date | — |
| Expiry date | Mar 11, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/045
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The input surface of the apparatus for detecting X and Y coordinates of the input points comprises a first parallel electrode group, a second flexible parallel electrode group opposing and intersecting the first parallel electrode group. A pressure conductive rubber sheet which becomes conductive when the pressure is applied to the input surface is interposed between the two electrode groups. First and second resistors are provided which are in electrical contact with terminal ends of the two electrode groups. Electric signals from the first and second resistors are used to detect X and Y coordinates of input points on the input surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.