Optical touch pad with multilayer waveguide
US8013845B2 · kind B2 · utility
62Cited by
19References
128Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2005 |
| Grant date | Sep 6, 2011 |
| Priority date | — |
| Expiry date | Apr 19, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04109
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An optical touch pad that includes a multilayer waveguide optically coupled to at least one electromagnetic radiation detector. Based on electromagnetic radiation directed from an object to the detector by the multilayer waveguide, information related to an object proximate to (e.g., hovering above) and/or in contact with the optical touch pad may be determined. For example, the information related to the object may include position information, object-type information, and/or other information related to the object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.