Piezoelectric Vibration Panel for Touch Display Haptic Feedback
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Solution Overview
Problem
Current haptic feedback technologies in touch displays lack effective means to provide both visual and tactile feedback, especially in vehicle-mounted displays, where the interaction with the human body through tactile sense is limited.
Innovation Solution
A vibration panel comprising a piezoelectric device and a vibration transmission structure, integrated with a touch display apparatus, which generates vibrations under an alternating voltage signal to transmit force and create haptic feedback when a finger touches the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vibration feedback technology is added to touch display, then haptic feedback capability is improved, but device complexity increases
Solution Approach 1:
The patent combines the vibration generation function and vibration transmission function into a single integrated structure. The piezoelectric device is directly coupled with the vibration transmission structure, eliminating the need for separate vibration motors and transmission mechanisms. This merging approach provides effective haptic feedback while avoiding the complexity of multiple independent components.
Solution Approach 2:
The vibration transmission structure serves multiple functions: it transmits vibration force from the piezoelectric device, provides mechanical support, and acts as part of the display panel assembly. This multi-functionality reduces the need for additional dedicated components, thereby improving haptic feedback capability without proportionally increasing device complexity.
2Adaptability or versatility
If piezoelectric device is integrated with touch display panel, then both visual and tactile feedback are achieved, but manufacturing complexity increases
Solution Approach 1:
The patent divides the display system into distinct functional modules: the touch display panel layer and the vibration panel layer below it. The piezoelectric device is positioned in the vibration panel, separate from the touch panel assembly. This segmentation allows each module to be manufactured and tested independently before final integration, reducing overall manufacturing complexity while achieving integrated visual and tactile feedback.
Solution Approach 2:
The vibration transmission structure acts as an intermediary between the piezoelectric device and the touch display panel. It receives vibration forces from the piezoelectric device and transmits them to the display panel, enabling the coupling of visual and tactile functions without requiring direct integration of the piezoelectric device into the touch panel manufacturing process.
3Force
If vibration transmission structure is added, then haptic feedback effectiveness is improved, but device structure becomes more complex
Solution Approach 1:
The vibration transmission structure is designed as a thin, flexible component that can efficiently transmit vibration forces while maintaining a compact form factor. This thin-film approach provides effective haptic feedback transmission without adding significant structural complexity or thickness to the overall device.
Solution Approach 2:
The vibration transmission structure utilizes composite material design that combines materials with different properties to optimize both vibration transmission efficiency and structural integrity. This composite approach enhances force transmission capability while keeping the structure simple and integrated with the existing display panel layers.
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
The solution enables both visual and haptic feedback effects by transmitting vibration force from the piezoelectric device to the touch display panel, enhancing user interaction and feedback experience, particularly in vehicle-mounted applications.
Implementation Method 1
a piezoelectric device, located on the fixed substrate, and configured to generate an inverse piezoelectric effect to generate vibration under an action of an alternating voltage signal
Data Source
AI summary
Embodiments of the present disclosure provide a vibration panel and a touch display apparatus. The vibration panel includes: a fixed substrate; a piezoelectric device, located on the fixed substrate, and configured to generate an inverse piezoelectric effect to generate vibration under an action of an alternating voltage signal; and a vibration transmission structure, located on the piezoelectric device, and configured to transmit force generated during vibration of the piezoelectric device.