Passive touch system and method of detecting user input
US6803906B1 · kind B1 · utility
436Cited by
21References
109Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 5, 2000 |
| Grant date | Oct 12, 2004 |
| Priority date | — |
| Expiry date | Feb 4, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0425
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A passive touch system includes a passive touch surface and at least two cameras associated with the touch surface. The at least two cameras acquire images of the touch surface from different locations and have overlapping fields of view. A processor receives and processes images acquired by the at least two cameras to detect the existence of a pointer therein and to determine the location of the pointer relative to the touch surface. Actual pointer contact with the touch surface and pointer hover above the touch surface can be determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.