The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 21, 2023
Filed:
Sep. 03, 2020
Hap2u, Saint Martin d'Hères, FR;
Maxime Harazi, Saint Martin d'Hères, FR;
Mathieu Rupin, Saint Martin d'Hères, FR;
HAP2U, Saint Martin d'Hères, FR;
Abstract
A method for producing a haptic-feedback effect via a squeeze-film effect on a haptic interface equipped with electromechanical actuators configured to apply ultrasonic vibrations able to create standing waves, includes determining a subset of resonant frequencies fi of the haptic interface in the ultrasonic domain; defining a haptic sequence consisting of an electrical excitation signal s(t) formed from a succession of at least two periodic signals having frequencies fi, fj that are different from each other and that belong to said subset of resonant frequencies detecting a static touching action of a user on a region of a surface of the haptic interface; and exciting the electromechanical actuators using said electrical excitation signal s(t), so as to achieve a transition from a first standing wave to a second standing wave, so as to produce, on the haptic surface, lateral forces that cause the user to feel a key-click sensation.