Piezoelectric Speaker Vibration Plate Patterning for Sound Flatness
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Solution Overview
Problem
Existing piezoelectric speakers face challenges in optimizing sound quality and sound pressure characteristics due to variations in material and structure of the vibration member, necessitating improvements for slimmer and thinner electronic devices.
Innovation Solution
A sound output apparatus with a vibration member featuring a pattern part comprising holes and grooves, supported by a supporting member and connected via a coupling member, enhances sound pressure level and quality by optimizing the vibration mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a vibration member with a pattern part (holes and grooves) is used, then the average sound pressure level is increased, but the structure becomes more complex
Solution Approach 1:
The vibration member incorporates a pattern part with holes forming a porous structure. This porous configuration increases the surface area and vibration efficiency of the vibration member, thereby enhancing the sound pressure level output without requiring a larger device size.
Solution Approach 2:
The vibration member is divided into multiple functional regions through the pattern part, including holes and grooves that segment the structure. This segmentation allows different areas to contribute differently to sound generation, improving overall sound pressure distribution and quality.
2Reliability
If the vibration member structure is optimized for sound quality, then sound pressure level flatness is improved, but manufacturing precision requirements increase
Solution Approach 1:
The invention optimizes specific parameters of the pattern part including hole diameter (0.5-2mm), groove width (0.3-1.5mm), and their spatial distribution. By carefully controlling these parameters within specified ranges, the vibration member achieves improved sound pressure level flatness while maintaining manufacturability through standardized production processes.
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 apparatus achieves higher average sound pressure levels and improved sound pressure level flatness, reducing peaks and dips in the sound curve, thereby enhancing overall sound performance.
Implementation Method 1
a vibration apparatus configured to vibrate the vibration member based on a piezoelectric effect
Data Source
AI summary
A sound output apparatus can comprise a vibration member including a vibration plate, the vibration plate including a pattern part, and a vibration apparatus configured to vibrate the vibration member based on a piezoelectric effect. The pattern part comprises one or more of a plurality of holes and a plurality of grooves and is configured to increase an average sound pressure level of the sound output apparatus.