Pressure-Sensing Touch Panels With Integrated Tactile Feedback
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Solution Overview
Problem
Users often make mistakes during touch operations on touch panels, such as fault touches and false touches, which affect accuracy and efficiency, particularly in scenarios where visual focus is limited or obstructed.
Innovation Solution
A touch panel design incorporating pressure detectors and actuators connected by a driving circuit, where the ratio of actuators to pressure detectors is 1:4 to 2:1, with actuators arranged in arrays and pressure detectors positioned to overlap orthographically with actuators, providing tactile feedback based on detected pressure to correct user interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If tactile feedback is added to the touch panel, then user interaction accuracy is improved, but device complexity increases
Solution Approach 1:
The patent combines pressure detection and tactile feedback functions into a single integrated system. The driving circuit serves dual purposes: detecting pressure through the pressure detector and driving actuators to provide tactile feedback. This merging of functions reduces overall system complexity while maintaining improved user interaction accuracy through tactile feedback.
Solution Approach 2:
The driving circuit is designed with multi-functionality, serving both as a detection circuit for pressure sensing and as a driving circuit for actuator control. This universal component performs multiple roles within the system, reducing the need for separate dedicated circuits and thereby managing device complexity while enabling accurate pressure detection and tactile feedback.
2Reliability
If the ratio of actuators to pressure detectors is optimized, then tactile feedback effectiveness is improved, but manufacturing cost increases
Solution Approach 1:
The patent implements a non-uniform distribution of actuators and pressure detectors across the touch panel surface, with higher density in critical interaction zones and lower density in peripheral areas. This local optimization ensures effective tactile feedback where most needed while reducing overall component quantity and manufacturing cost.
Solution Approach 2:
The system uses a ratio of actuators to pressure detectors between 1:4 and 2:1, providing tactile feedback for only a subset of pressure detection points. This partial action approach delivers sufficient tactile feedback effectiveness for common interaction scenarios while avoiding the excessive cost of providing feedback at every single pressure detector 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
Enhances user interaction accuracy by allowing users to feel tactile feedback, correcting mistakes promptly and improving the overall user experience by ensuring precise touch operations.
Implementation Method 1
each of the at least one piezoelectric device comprises a piezoelectric material layer
Implementation Method 2
actuating the piezoelectric device to implement the tactile feedback
Data Source
AI summary
This application discloses a touch panel and a human-computer interaction method based on a touch panel. The touch panel includes a base substrate, at least one pressure detector and at least one actuator arranged on the base substrate, and a driving circuit. The at least one pressure detector is electrically connected to the driving circuit, and the driving circuit is electrically connected to the at least one actuator.