Piezoelectric Vibration Device for Display Sound and Haptics
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display apparatuses face challenges in delivering accurate sound quality and immersive experiences due to sound interference from walls and floors, and they often require separate haptic actuators for feedback, which complicates the integration of stereo sound and haptic outputs.
Innovation Solution
A display apparatus with a vibration generating device on its rear surface, featuring a piezoelectric member, damping member, and electrodes, which vibrates the display panel to produce sound and haptic feedback, allowing for position-based differentiation of sound and haptic outputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate haptic actuator is provided for haptic feedback, then haptic feedback performance is improved, but device complexity increases
Solution Approach 1:
The patent combines the sound output function and haptic feedback function into a single integrated device. The vibration generating device includes a piezoelectric member that can simultaneously produce acoustic waves for sound output and mechanical vibrations for haptic feedback, eliminating the need for separate haptic actuators and reducing overall device complexity
Solution Approach 2:
The vibration generating device is designed with multi-functionality, serving both as a sound output device and a haptic feedback device. By using the piezoelectric member to generate vibrations that can be transmitted to the display panel for both acoustic and haptic purposes, the device achieves universal functionality across different operational modes
2Ease of manufacture
If sound is output from the rear surface of the display panel, then sound output is simplified, but sound quality deteriorates due to interference from walls and floors
Solution Approach 1:
The patent applies local quality by positioning vibration generating devices at specific locations on the rear surface of the display panel. By strategically placing multiple vibration generating devices at different positions and controlling their vibration characteristics independently, the system creates localized vibration patterns that produce directional sound waves, improving sound quality while maintaining the simplified rear-surface output structure
Solution Approach 2:
The sound output system is segmented into multiple independent vibration generating devices distributed across the rear surface of the display panel. Each vibration generating device can be controlled independently to produce specific vibration patterns, allowing the system to overcome interference issues by creating coordinated vibration patterns from multiple sources
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 sound quality and immersion by reducing interference and integrating stereo sound and haptic feedback, enabling position-based sound and vibration outputs without the need for separate haptic actuators.
Implementation Method 1
a piezoelectric member under the first electrode
Implementation Method 2
a damping member in a periphery of the piezoelectric member
Data Source
AI summary
A display apparatus includes a display panel configured to display an image and a plurality of vibration generating devices on a rear surface of the display panel, the display panel being at least one of a vibration plate configured to output sound and a vibration plate configured to output a haptic vibration. Each of the plurality of vibration generating devices includes a first electrode under the display panel, a piezoelectric member under the first electrode, a damping member in a periphery the piezoelectric member, and a second electrode under the piezoelectric member.