Input device with photodetector pairs
US8711093B2 · kind B2 · utility
95Cited by
5References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 24, 2010 |
| Grant date | Apr 29, 2014 |
| Priority date | — |
| Expiry date | Jul 16, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/042
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Input devices configured to provide user interface by detecting three dimensional movement of an external object are disclosed. The input device comprises at least two photodetector pairs, a radiation source and a circuit configurable to detect differential and common mode signals generated in the photodetector pairs. By detecting the common mode and differential signals, movement of an external object may be determined and used to control a pointer, or a cursor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.