Method for creating a haptic effect by means of focused ultrasound waves
US12210683B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 30, 2019 |
| Grant date | Jan 28, 2025 |
| Priority date | — |
| Expiry date | Mar 26, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/204
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The invention concerns a method for generating a haptic effect at a target point of a solid by using at least two piezoelectric actuators capable of emitting, at a given instant t, a wave under the effect of ultrasonic frequency control signals capable of creating vibrations at the surface of the solid in such a way as to create an ultrasonic lubrication effect (“squeeze film” effect) at the target point. The respective control signal of each actuator is calculated depending on the distance between the respective actuator and the target point to be actuated, such that the surface deformations obtained at the target point under consideration combine to create a haptic effect there greater than that obtained when using a single actuator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.