Laser scanning devices and methods with touch detection
US10474296B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 12, 2018 |
| Grant date | Nov 12, 2019 |
| Priority date | — |
| Expiry date | Aug 1, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3164
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Laser scanning devices and methods are described that provide for improved touch detection. The laser scanning devices and methods determine if an object is touching a touch surface by determining if a halo region having corresponding locally high amplitude signals is proximate to the object. The presence of such a halo region can confirm that the object is touching surface and not just hovering above the surface. Furthermore, the presence of the halo region can confirm object touching even for objects having significantly different sizes. As one example, the determined presence of the halo region can be used to reliably determine that a human finger is touching the surface even though human fingers can have significantly different sizes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.