Using a light pointer for input on an interactive display surface
US7499027B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2005 |
| Grant date | Mar 3, 2009 |
| Priority date | — |
| Expiry date | Mar 8, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0425
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A light pointer is selectively activated to direct a light beam onto an interactive display surface, forming a pattern of light that is detected by a light sensor disposed within an interactive display table. The waveband of the light produced by the light pointer is selected to correspond to a waveband to which the light sensor responds, enabling the light sensor to detect the position of the pattern on the interactive display surface, as well as characteristics that enable the location and orientation of the light pointer to be determined. Specifically, the shape and size of the pattern, and the intensity of light forming the pattern are detected by the light sensor and are processed to determine the orientation of the light pointer and its distance from the interactive display surface. The pattern may comprise various shapes, such as circles, arrows, and crosshairs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.