Coordinate input pen, and electronic board, coordinate input system and electronic board system using the coordinate input pen
US6437314B1 · kind B1 · utility
42Cited by
29References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 26, 1999 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | May 26, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/03545
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a coordinate input pen for specifying and outputting coordinates of the pen by detecting two infrared beams that are emitted from two separate positions for pivotally scanning over a plane parallel to a surface of a display panel. The coordinate input pen includes: a shaft portion; a transparent conical light scattering member with a rough surface, which is, placed at the end of the shaft portion; and a light receiving element for detecting an infrared beam scattered within the light scattering member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.