Device for generating haptic feedback

A piezoelectric actuator with reinforced metal strips addresses the inefficiencies of existing haptic feedback devices, offering a compact, cost-effective solution for generating haptic feedback in touchscreens.

DE102016116763B4Active Publication Date: 2026-07-02TDK ELECTRONICS AG
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Patent Information

Application Number
DE102016116763
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Filing Date
2016-09-07
Publication Date
2026-07-02
Estimated Expiration
2036-09-07

AI Technical Summary

Technical Problem

Existing devices for generating haptic feedback are complex, inefficient, and require significant space and resources, making them costly and unsuitable for applications like touchscreens in the automotive sector.

Method used

A device comprising a piezoelectric actuator with stacked piezoelectric layers and internal electrodes, reinforced by symmetrical metal strips that deform in response to electrical voltage, allowing for efficient haptic feedback generation with minimal space and cost.

Benefits of technology

The device provides effective haptic feedback with a compact design, efficient manufacturing, and reduced costs, suitable for generating displacements suitable for touchscreens, particularly in automotive applications.

✦ Generated by Eureka AI based on patent content.

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Abstract

An arrangement comprising a screen and a device (10) for generating haptic feedback on the screen, comprising: - at least one piezoelectric actuator (11), comprising a plurality of piezoelectric layers (22), - a first amplifying element (13a) and a second amplifying element (13b), wherein the piezoelectric actuator (11) is arranged between the amplifying elements (13a, 13b), wherein the piezoelectric actuator (11) is configured and arranged to change its dimensions when an electrical voltage is applied in a first direction (R1), and wherein the amplifying elements (13a, 13b) are configured and arranged to deform as a result of the change in the dimensions of the piezoelectric actuator (11) such that a partial region (17a, 17b) of the respective amplifying element (13a, 13b) is relative to the piezoelectric actuator (11) is moved in a second direction (R2) which is perpendicular to the first direction (R1),wherein the reinforcing elements (13a, 13b) each have at least one end region (18a, 18b), wherein the end region (18a, 18b) of the first reinforcing element (13a) rests directly on a top side of the actuator and the end region of the second reinforcing element (13b) rests directly on a bottom side of the actuator, wherein the first reinforcing element (13a) and the second reinforcing element (13b) each have a metal strip, wherein for the device: D ≥ m(2Δp / T)² where D represents a minimum stiffness of the device, m represents a mass of the screen and T represents a deflection duration, wherein the device (10) is designed and arranged to cause an offset of the screen parallel to the screen surface.
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Citation Information

Patent Citations

  • Two-stage micro-displacement amplification mechanism

    CN102394270A

  • Piezoelectric actuator for flap control on a helicopter rotor blade

    DE10017332A1

  • Component for generating an active haptic feedback

    DE102015117262A1

  • Electrostrictive actuator

    EP0902488A1

  • Touch panel display device, touch pad, and electronic apparatus

    JP2008287402A