Position detection method, position detection device, and display device
US11700365B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 2021 |
| Grant date | Jul 11, 2023 |
| Priority date | — |
| Expiry date | Jul 19, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/80
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Position detection methods and systems are disclosed herein. The position detection method of detecting a position in an operation surface pointed by a pointing element includes obtaining a first taken image with the first infrared camera, obtaining a second taken image with the second infrared camera, removing a noise component from the first and second images converting the first and second taken into converted images without the noise component, forming a difference image between the first converted taken image and the second converted taken image, extracting a candidate area in which a disparity amount between the first converted taken image and the second converted taken image is within a predetermined range, detecting a tip position of the pointing element from the candidate area, and determining a pointing position of the pointing element and whether or not the pointing element had contact with the operation surface based on the detecting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.