Piezoelectric Sound Generator Structure for Balanced Frequency Output
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Solution Overview
Problem
Existing display apparatuses with integrated sound generation capabilities suffer from limitations in sound quality, particularly in achieving balanced sound pressure levels across different frequency bands.
Innovation Solution
A sound generator comprising a piezoelectric device with strategically positioned weight and elastic members, along with a protection member, to enhance sound quality by amplifying vibrations and controlling sound pressure levels across various frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a display panel is controlled to vibrate to generate sound, then sound generation capability is achieved, but sound quality is insufficient
Solution Approach 1:
The piezoelectric device is divided into multiple independent driving regions (first, second, and third driving regions) that can be controlled separately. Each region corresponds to different frequency bands, allowing independent optimization of sound generation for each band, thereby improving overall sound quality while maintaining sound generation capability
Solution Approach 2:
Different weight members are strategically positioned at specific locations (first and second portions) of the piezoelectric device to optimize vibration characteristics for different frequency bands. The first weight member enhances low-frequency sound pressure, while the second weight member optimizes mid-frequency response, creating local quality improvements that collectively enhance overall sound quality
2Power
If weight members are added to enhance sound pressure levels, then low-frequency sound quality improves, but device complexity increases
Solution Approach 1:
The weight members serve multiple functions: they enhance sound pressure levels in specific frequency bands, adjust the center of gravity for optimal vibration, and act as counterweights to reduce unwanted vibrations. This multi-functionality allows sound quality improvement without proportionally increasing device complexity
Solution Approach 2:
The weight members are integrated with the piezoelectric device structure rather than being separate components. The first and second weight members are positioned at specific portions of the piezoelectric device, merging their mass with the existing structure to achieve sound enhancement without adding significant structural 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
The solution achieves improved sound quality by enhancing sound pressure levels and reducing noise and high-frequency sounds, particularly in high-pitched bands, resulting in a more balanced audio output.
Implementation Method 1
a piezoelectric device; a first weight member disposed at a first portion of the piezoelectric device; a second weight member disposed at a second portion of the piezoelectric device
Implementation Method 2
a first elastic member disposed at a third portion between the first portion and the second portion of the piezoelectric device
Data Source
AI summary
A sound generator includes a piezoelectric device, a first weight member disposed at a first portion of the piezoelectric device, a second weight member disposed at a second portion of the piezoelectric device, a first elastic member disposed at a third portion between the first portion and the second portion of the piezoelectric device, and a protection member configured to cover the piezoelectric device, the first weight member, the second weight member, and the first elastic member.