Localized Piezoelectric Tactile Feedback for Touch Displays
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Solution Overview
Problem
Current touch display technologies lack effective means for providing real tactile feedback during touch interactions.
Innovation Solution
A tactile feedback device comprising a base substrate with a touch element and piezoelectric elements, driven by a tactile feedback driving component to generate tactile feedback based on touch position and action type, using different signal types for various touch areas and actions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If piezoelectric elements are added to provide tactile feedback, then tactile feedback capability is improved, but device complexity increases
Solution Approach 1:
The display screen is divided into multiple feedback areas surrounding the sensing area, with each area containing piezoelectric elements that can be independently controlled to provide localized tactile feedback for different touch interactions
Solution Approach 2:
A tactile feedback driving component is introduced as an intermediary between the touch element and piezoelectric elements, which processes touch data and generates appropriate driving signals to control the piezoelectric elements, thereby managing system complexity through modular design
2Manufacturing precision
If different driving signals are used for different touch areas and actions, then tactile feedback precision is improved, but control complexity increases
Solution Approach 1:
Different driving signals are applied to different feedback areas based on the touch position and action type, with edge areas using high-frequency continuous wave signals for slide actions and internal areas using low-frequency square wave pulse signals for press actions, creating localized differentiated tactile feedback
Solution Approach 2:
The system dynamically adjusts the driving signal characteristics (frequency, waveform type) based on real-time touch detection results, transitioning between different signal modes to match the user's interaction type and location
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Provides tailored tactile feedback experiences, such as edge, internal, and stripe interactions, enhancing user engagement and interaction quality.
Implementation Method 1
a piezoelectric element in the feedback area; and wherein the tactile feedback driving component is configured to: determine a touch position in response to a touch data acquired by the touch element; determine a corresponding driving signal according to at least the touch area where the touch position is located; and input the driving signal to the piezoelectric element to drive the piezoelectric element to generate a tactile feedback
Data Source
AI summary
The present disclosure provides a tactile feedback device having a sensing area and a feedback area surrounding the sensing area; wherein the tactile feedback device includes: a base substrate, a touch element in the sensing area, a piezoelectric element in the feedback area, and a tactile feedback driving component, on the base substrate; and wherein the tactile feedback driving component is configured to: determine a touch position in response to a touch data acquired by the touch element; determine a corresponding driving signal according to at least a touch area where the touch position is located; and input the driving signal to the piezoelectric element to drive the piezoelectric element to generate a tactile feedback. The present disclosure also provides a display apparatus and a tactile feedback method.