Detecting multitouch events in an optical touch-sensitive device by combining beam information
US8531435B2 · kind B2 · utility
11Cited by
17References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 30, 2012 |
| Grant date | Sep 10, 2013 |
| Priority date | — |
| Expiry date | May 4, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04109
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An optical touch-sensitive device is able to determine the locations of multiple simultaneous touch events. The optical touch-sensitive device includes multiple emitters and detectors. Each emitter produces optical beams which are received by the detectors. The optical beams preferably are multiplexed in a manner so that many optical beams can be received by a detector simultaneously. Touch events disturb the optical beams. To determine whether a candidate touch point is an actual touch event, multiple beams that would be affected are considered together.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.