US 11,850,630 B2
Device and method for producing active haptic feedback
Daniel Neuwirth, Vilshofen (DE); Roman Puchleitner, St. Stefan (AT); Aditya Rajapurkar, Graz (AT); and Andreas Pentscher-Stani, Leibnitz (AT)
Assigned to TDK Electronics AG, Munich (DE)
Appl. No. 16/967,068
Filed by TDK Electronics AG, Munich (DE)
PCT Filed Feb. 5, 2019, PCT No. PCT/EP2019/052786
§ 371(c)(1), (2) Date Aug. 3, 2020,
PCT Pub. No. WO2019/154810, PCT Pub. Date Aug. 15, 2019.
Claims priority of application No. 102018102630.7 (DE), filed on Feb. 6, 2018.
Prior Publication US 2021/0031235 A1, Feb. 4, 2021
Int. Cl. B06B 1/06 (2006.01); G06F 3/01 (2006.01); H02N 2/04 (2006.01); H03K 17/96 (2006.01); H10N 30/50 (2023.01); H10N 30/20 (2023.01)
CPC B06B 1/0644 (2013.01) [G06F 3/016 (2013.01); H02N 2/043 (2013.01); H03K 17/964 (2013.01); H03K 17/9625 (2013.01); H10N 30/202 (2023.02); H10N 30/50 (2023.02); H03K 2217/96062 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A device for producing active haptic feedback comprising:
at least one piezoelectric actuator having a plurality of piezoelectric layers and internal electrodes arranged therebetween;
a first amplification element and a second amplification element, wherein the at least one piezoelectric actuator is arranged between the first and second amplification elements, wherein the at least one piezoelectric actuator is configured to change its extension in a first direction upon application of an electrical voltage, and wherein the first and second amplification elements are configured to deform as a result of the change in the extension of the at least one piezoelectric actuator such that a subregion of a respective amplification element is moved relative to the at least one piezoelectric actuator in a second direction, which is perpendicular to the first direction; and
a driver circuit configured to apply the electrical voltage to the at least one piezoelectric actuator such that the first and second amplification elements are deformed thereby producing the active haptic feedback against an object pressing on the device, the active haptic feedback imitating a jump in force.