Optical touch panel
US7573465B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2007 |
| Grant date | Aug 11, 2009 |
| Priority date | — |
| Expiry date | Nov 18, 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 light guide illumination assembly arranged along and above at least most of a periphery of the support to define a detection region, the assembly including at least one optical light guide and a light source arranged for directing light along the at least one optical light guide, at least one light detector, arranged to detect changes in the light received from the optical light guide illumination assembly produced by the presence of an object 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 the object present in the detection region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.