Optical touch panel
US8451235B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2008 |
| Grant date | May 28, 2013 |
| Priority date | — |
| Expiry date | Jan 29, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0421
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An optical touch panel is provided, which may comprise a rectangular position-detecting surface; a plurality of light-emitting element pairs configured for emitting a plurality of light beams; two reflectors configured for reflecting the plurality of light beams emitted by the plurality of light-emitting element pairs; and a plurality of light-receiving element pairs configured for receiving the plurality of light beams emitted by the plurality of light-emitting element pairs. The optical touch panel further may comprise a control circuit configured for causing the light-emitting element pairs to emit the plurality of light beams in a predetermined order to scan the position-detecting surface, and further configured for causing the plurality of light-receiving element pairs to receive the plurality of light beams, thereby forming optical paths on the position-detecting surface in a grid pattern. The control circuit further may be configured for determining the coordinates of an object positioned on the position-detecting surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.