Coordinate detection system, coordinate detection method, and information processing device
US9575574B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 5, 2015 |
| Grant date | Feb 21, 2017 |
| Priority date | — |
| Expiry date | Apr 2, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0421
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A coordinate detection system includes a coordinate input device including a panel surface, an indication tool including a tip part with a conical shape or truncated-conical shape, a first image taking device to take a first image of the indication tool, a second image taking device to take a second image of the indication tool, and an information processing device to detect a first set of two oblique lines of the conical shape or truncated-conical shape based on the first image, detect a second set of two oblique lines of the conical shape or truncated-conical shape based on the second image, and calculate coordinates of a vertex of the tip part on the panel surface based on a first point of intersection between two oblique lines included in the first set and a second point of intersection between two oblique lines included in the second set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.