Optical touch apparatus using a dynamic threshold for sensing a touch device and optical touch method
US9360964B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2014 |
| Grant date | Jun 7, 2016 |
| Priority date | — |
| Expiry date | Feb 11, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/04162
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An optical touch apparatus and an optical touch method are disclosed. The optical touch apparatus comprises a touch panel, a first optical sensor, a second optical sensor and a processor. The first optical sensor senses a light pen to output a first sensing signal. The second optical sensor senses the light pen to output a second sensing signal. The processor decides a threshold value according to the second sensing signal, and determines whether the first sensing signal is greater than the threshold value. The processor determines that the light pen touches the touch panel if the first sensing signal is greater than the threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.