Dual mode touch systems
US8274496B2 · kind B2 · utility
6Cited by
295References
42Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2008 |
| Grant date | Sep 25, 2012 |
| Priority date | — |
| Expiry date | Mar 10, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0421
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for detecting a pointer includes a waveguide and a touch surface over the waveguide on which pointer contacts are to be made. At least one reflecting device extends along a first side of the waveguide and touch surface. The reflecting device defines an optical path between the interior of the waveguide and the region of interest above the touch surface. At least one imaging device looks across the touch surface and into the waveguide. The imaging device captures images of the region of interest and within the waveguide including reflections from the reflecting device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.