Optical touch device and method for detecting touch point
US9110588B2 · kind B2 · utility
0Cited by
0References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 15, 2014 |
| Grant date | Aug 18, 2015 |
| Priority date | — |
| Expiry date | May 15, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04104
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An optical touch device utilizes two images sensed by two image sensing units, which are diagonal to each other, to determine whether a number of touch points located at a central touch area is equal to 1. When the number of touch points are larger than 1, the optical touch device further utilizes another two images sensed by another two image sensing units, which are also diagonal to each other, to assist in determining the number of touch points located at the central touch area, so as to improve the accuracy of determination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.