Display Panel Speaker Using Elastic Piezoelectric Vibration Transfer
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Solution Overview
Problem
Existing display devices that utilize a display panel as a speaker suffer from inadequate sound quality due to insufficient sound pressure and potential resonance noise.
Innovation Solution
A display device is designed with a piezoelectric element connected to a display panel through an elastic member, where the piezoelectric element vibrates in response to audio signals, transmitting vibrations to the display panel to produce sound, with configurations such as multiple vibration parts and different frequency characteristics to enhance sound pressure and reduce resonance noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the display panel is directly connected to the piezoelectric element, then the structure is simple, but the sound quality is insufficient due to inadequate sound pressure
Solution Approach 1:
An elastic member is introduced as an intermediary component between the piezoelectric element and the display panel. This elastic member transmits vibrations from the piezoelectric element to the display panel while maintaining structural simplicity, thereby improving sound quality without significantly increasing device complexity
2Device complexity
If the display panel is used as a speaker without additional components, then the device complexity is low, but the sound pressure is insufficient
Solution Approach 1:
The elastic member serves as a mediator that amplifies and transmits vibrations effectively, enabling the display panel to generate sufficient sound pressure when used as a speaker without requiring a complete redesign of the device structure
3Productivity
If the piezoelectric element is rigidly connected to the display panel, then the vibration transmission is efficient, but resonance noise occurs
Solution Approach 1:
The connection method is changed from rigid to elastic, modifying the mechanical parameters of the connection interface. This allows vibration transmission while introducing damping characteristics that reduce resonance noise, achieving both efficient energy transfer and noise suppression
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 design improves sound quality by increasing sound pressure and reducing resonance noise, allowing the display panel to function effectively as a speaker.
Implementation Method 1
a piezoelectric element vibrated according to input audio signals
Implementation Method 2
An elastic member is provided which is configured to connect a portion of the piezoelectric element and the display panel so as to transmit a vibration of the piezoelectric element to the display panel
Data Source
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AI summary
The present disclosure is directed to improving sound quality in a display device which emits a sound from a display panel. The display device includes a piezoelectric element vibrated according to input audio signals, a display panel configured to display an image, and an elastic member configured to connect a portion of the piezoelectric element and the display panel so as to transmit a vibration of the piezoelectric element to the display panel.