Device for creating haptic sensations on a surface using ultrasonic waves producing elliptical movements
US12189856B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 29, 2021 |
| Grant date | Jan 7, 2025 |
| Priority date | — |
| Expiry date | Jan 29, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04105
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to a touch interface comprising, on the one hand, an interfacial surface able to generate a haptic-feedback effect in response to a touch of said surface by a user, and, on the other hand, at least one piezoelectric actuator configured to generate, in said interfacial surface, at least one wave of ultrasonic frequency able to endow the particles of this surface with an elliptical movement having a movement component tangential to said surface, which component is denoted ut(t), and a movement component normal to said surface, which component is denoted un(t), wherein said wave of ultrasonic frequency is chosen so that the amplitude Ut of the tangential component ut(t) and the amplitude Un of the normal component un(t) are substantially equal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.