Press Detector With Piezoelectric Element For Thin Haptic Feedback
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Solution Overview
Problem
Existing electronic devices that provide haptic feedback struggle to offer a varied and effective tactile sensation, particularly in detecting presses, as they often require specific configurations that are limited by the placement of press detectors and actuators, which can increase device thickness and complexity.
Innovation Solution
The electronic device incorporates a press detector comprising a piezoelectric element and a plate member, where the press detector is positioned on the side of the panel, allowing it to detect a press in a direction different from the panel's press direction, using elastic members to facilitate displacement and provide a tactile sensation by bending in the transverse direction, thus reducing thickness and increasing configuration variability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the press detector and actuator are placed on the panel to provide haptic feedback, then tactile sensation is achieved, but device thickness and structural complexity increase
Solution Approach 1:
The press detector is designed to perform dual functions: detecting press inputs and providing haptic feedback through elastic members. By making the press detector multi-functional, the patent eliminates the need for separate actuators, thereby reducing device thickness while maintaining tactile feedback capability
Solution Approach 2:
The press detector uses its own structure (elastic members) to provide haptic feedback without requiring external actuators. The elastic members naturally return to their original state after deformation, generating tactile sensation automatically, which reduces overall device complexity and thickness
2Measurement precision
If the press detector is positioned on the panel side to detect presses, then detection capability is achieved, but configuration flexibility is limited
Solution Approach 1:
The patent detects presses in a direction different from the panel's press direction by utilizing the lateral displacement of elastic members. This dimensional transformation allows the press detector to be positioned on the panel side while maintaining detection accuracy and improving configuration flexibility
Solution Approach 2:
The patent changes the detection parameter from direct vertical press detection to lateral displacement detection of elastic members. This parameter transformation enables the press detector to achieve both accurate press detection and greater configuration variability
3Ease of operation
If additional actuators are added to provide tactile feedback, then haptic sensation is enhanced, but device complexity increases
Solution Approach 1:
The press detector is designed to perform dual functions: detecting press inputs and providing haptic feedback through elastic members. By making the press detector multi-functional, the patent eliminates the need for separate actuators, thereby reducing device thickness while maintaining tactile feedback capability
Solution Approach 2:
The patent merges the detection function and haptic feedback function into a single press detector assembly. The elastic members serve both as detection elements and feedback providers, combining multiple functions into one structure to reduce overall device complexity
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
This configuration enables efficient detection of presses and provision of a tactile sensation across the panel surface, enhancing user experience with a more uniform tactile feedback without the need for additional actuators, while maintaining a compact design.
Implementation Method 1
a press detector comprising a piezoelectric element and a plate member
Implementation Method 2
using elastic members to facilitate displacement and provide a tactile sensation by bending in the transverse direction
Data Source
Figure 1
Figure 2
Figure 3A~3D
AI summary
An electronic device includes a panel and a press detector configured to detect a press. The press detector detects the press on the basis of a force in a direction different from the press direction of the panel.