Coordinate position inputting/detecting device, a method for inputting/detecting the coordinate position, and a display board system
US6421042B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1999 |
| Grant date | Jul 16, 2002 |
| Priority date | — |
| Expiry date | Jun 9, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/04845
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The coordinate-position inputting/detecting device comprises a lighting device for emitting light into an entry area into which an arbitrary pointing body is inserted to perform an entry operation. At least two image pickup devices are provided with a prespecified space therebetween on a peripheral section of the entry area for picking up images of the pointing body illuminated by the light from the lighting device. Position on the CCD of the image pickup devices where an image of the pointing body is formed is obtained according to output from each of the image pickup devices. Coordinates of the position of the pointing body in the entry area are calculated from these positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.