Scanning mirror touch screen
US8723837B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 2011 |
| Grant date | May 13, 2014 |
| Priority date | — |
| Expiry date | Sep 5, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0423
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A touch panel system includes a panel, first and second scanning mirrors located about first and second panel corners, a photodetector array along a first panel edge between the first and the second panel corners, and a stationary plane mirror along a second panel edge adjacent to the first panel edge. The first scanning mirror sweeps a light beam across the panel. The second mirror sweeps another light beam across the panel, a part of which reflects from the stationary plane mirror to back into the panel to sweep the panel from a different angle. The light beams, including the reflected part from the stationary plane mirror, strike objects on the panel and reflect towards the photodetector array. Angular positions of the first and the second scanning mirrors at the times the photodetector array detects the reflected light are correlated to object locations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.