Touch sensitive computer input device
US4247767A · kind A · utility
104Cited by
3References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 16, 1978 |
| Grant date | Jan 27, 1981 |
| Priority date | — |
| Expiry date | Oct 16, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/002
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for detecting the position of an object, e.g. for interaction with a computer graphic display, has a number of light emitting diodes in an endless array, and a lesser number of light detecting devices for providing electrical signals in response to momentary and successive energization of the light emitting diodes. The signals are electronically processed to provide cartesian co-ordinates. This apparatus provides high resolution with a minimum number of light detecting devices and enables too large objects and malfunctions to be readily detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.