System and a method of determining the position of a radiation emitting element
US7435940B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2004 |
| Grant date | Oct 14, 2008 |
| Priority date | — |
| Expiry date | Oct 4, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/042
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and a system, such as a touch pad, for determining the position of a radiation emitter, which radiation emitter may be an actively radiation emitting stylus, pen, pointer, or the like or may be a passive, radiation scattering/reflecting/diffusing element, such as a pen, pointer, or a finger of an operator. The radiation is modulated by a bar code element and provided onto an at least one-dimensional detector. From the output of the detector, the position of the radiation emitter is determined. This system may be used as a standard touch pad or for determining the position of emitters external thereto, such as a marker used on a wall or black/white board or may be used with “internal” positions such as a touch pad.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.