Coordinate input device working with at least display screen and desk-top surface as the pointing areas thereof
US7414617B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Mar 5, 2007 |
| Grant date | Aug 19, 2008 |
| Priority date | — |
| Expiry date | Mar 5, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0421
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A coordinate input device includes a pair of cameras positioned in an upper left position and an upper right position of a display screen of a monitor lying close to a plane extending from the display screen of the monitor and views both a side face of an object in contact with a position on the display screen and a predetermined desk-top coordinate detection area to capture the image of the object with the field of view. The coordinate input device also included a control circuit which calculates the coordinate value of a pointing tool, pointing to a position within a coordinate detection field, based on video signals output from the pair of cameras, and transfers the coordinate value to a program of a computer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.