Optical touch device and method for calculating coordinate of touch point
US9075480B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Jun 4, 2014 |
| Grant date | Jul 7, 2015 |
| Priority date | — |
| Expiry date | Jun 4, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0418
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An optical touch device utilizes a weighting to integrate two coordinates of a touch point sensed by two sets of image sensing units, so as to calculate an output coordinate of the touch point performed on a central touch area. Accordingly, the invention can effectively prevent a touch trajectory from shifting on the central touch area, such that the touch trajectory will be much smoother on the central touch area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.