US 12,189,856 B2
Device for creating haptic sensations on a surface using ultrasonic waves producing elliptical movements
Matthieu Rupin, Saint Martin d'Hères (FR); Pierre Garcia, Saint Martin d'Hères (FR); Frederic Giraud, Lille (FR); Christophe Giraud-Audine, Lille (FR); Betty Semail, Lille (FR); and Michel Amberg, Lille (FR)
Assigned to VIBRA NOVA, Saint-Paul-de-Varces (FR); and UNIVERSITÉ DE LILLE, Lille (FR)
Appl. No. 17/795,754
Filed by HAP2U, Saint Martin d'Hères (FR); and UNIVERSITÉ DE LILLE, Lille (FR)
PCT Filed Jan. 29, 2021, PCT No. PCT/FR2021/000006
§ 371(c)(1), (2) Date Jul. 27, 2022,
PCT Pub. No. WO2021/152227, PCT Pub. Date Aug. 5, 2021.
Claims priority of application No. 2000932 (FR), filed on Jan. 30, 2020.
Prior Publication US 2023/0075405 A1, Mar. 9, 2023
Int. Cl. G06F 3/01 (2006.01); G06F 3/041 (2006.01)
CPC G06F 3/016 (2013.01) [G06F 3/041 (2013.01); G06F 2203/04105 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A touch interface comprising, on the one hand, an interface surface able to generate a haptic-feedback effect in response to a touch of said surface by a user, and, on the other hand, piezoelectric actuators configured to generate, at every point on said interface surface, ultrasonic vibration at the interface surface that imparts, to the particles of said surface, an elliptical movement having a movement component tangential to said surface, which is denoted ut(t), and which is of amplitude denoted Ut, and a movement component normal to said surface, which is denoted un(t), and which is of amplitude denoted Un, wherein said piezoelectric actuators are configured so that on said interface surface the amplitude Ut of the tangential movement of the particles is substantially equal to the amplitude Un of the normal movement of the particles, and wherein said ultrasonic vibration is obtained at the interface surface by combining two standing waves of the interface surface having the same ultrasonic frequency.