Touch input device having power profiling
US4672364A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 18, 1984 |
| Grant date | Jun 9, 1987 |
| Priority date | — |
| Expiry date | Jun 18, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0421
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An infrared touch input system having bezel glare compensation via power profiling is taught. Briefly stated, a touch input system is utilized having a four-sided frame and having an infrared transparent bezel along the inside thereof and having infrared emitters along the top and one side of the frame with infrared detectors along the sides opposite the emitters. The optical power used with emitter-detector pairs adjacent the corners of the bezel is reduced with respect to emitter-detector pairs approaching the center of the bezel. In this manner, light which is reflected after striking the side of the bezel adjacent the emitter-detector pair and which is received by the emitter is of low intensity or is ignored.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.