Optical touch screen
US7333094B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2007 |
| Grant date | Feb 19, 2008 |
| Priority date | — |
| Expiry date | Mar 27, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0428
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An optical touch panel including a support, an optical fiber illumination assembly arranged along and above at least part of a periphery of the support to define a detection region, the assembly including at least one optical fiber and a light source arranged for directing light along the at least one optical fiber, at least one light detector, arranged to detect changes in the light received from the optical fiber illumination assembly produced by the presence of a finger or stylus in the detection region and detection circuitry receiving at least one output from the at least one light detector and providing an output indication of the two dimensional location of finger or stylus impingement in the detection region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.