Device and method for optical touch panel illumination
US7477241B2 · kind B2 · utility
21Cited by
8References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 31, 2007 |
| Grant date | Jan 13, 2009 |
| Priority date | — |
| Expiry date | Dec 31, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0421
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An optical touch panel including a support defining a generally planar surface, an optical illumination assembly arranged along and above at least part of a periphery of the support to define a detection region, at least one light detector, arranged to detect changes in the light received from the optical 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 object impingement in the detection region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.