Piezoelectric Vibration Member Isolation for Compact Sound Apparatus
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Solution Overview
Problem
Speakers, particularly piezoelectric elements, occupy significant space and are prone to damage, leading to design constraints and impaired sound quality in devices like mobile devices and vehicles.
Innovation Solution
A sound apparatus comprising a vibration member, a housing, and a vibration apparatus that generates sound through vibration, enhancing sound characteristics and pressure levels without the need for traditional speakers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If piezoelectric elements are used to reduce thickness, then the thickness is reduced, but reliability decreases due to fragile characteristic and easy damage from external impact
Solution Approach 1:
The patent applies beforehand cushioning by introducing a damping layer between the piezoelectric element and the housing. This damping layer is configured to absorb external impacts before they reach the fragile piezoelectric element, thereby protecting it from damage while maintaining the thin profile. The damping layer acts as a protective buffer that cushions the piezoelectric element against shocks and vibrations during device operation or drops.
2Reliability
If traditional speakers are used, then sound quality is maintained, but space occupation increases and design is limited
Solution Approach 1:
The patent merges the speaker function with the existing display panel or vibration member by causing the display panel itself to vibrate for sound output. Instead of using a separate traditional speaker, the invention utilizes the display panel's vibration capabilities to generate sound waves, thereby combining two functions (display and audio) into a single component and significantly reducing space occupation.
Solution Approach 2:
The invention applies universality by making the display panel serve multiple functions: it acts as both the display interface and the sound-generating element. The vibration member/display panel is designed to perform both visual display and acoustic output, eliminating the need for dedicated speaker components and enabling more flexible spatial design.
3Length of moving object
If piezoelectric elements are used, then thickness is reduced, but sound quality deteriorates with impaired bass response and harsh high frequencies
Solution Approach 1:
The patent applies local quality by introducing a damping layer with specific acoustic properties at strategic locations within the speaker assembly. This damping layer is positioned to selectively affect different frequency ranges, particularly to soften harsh high frequencies and enhance bass response. The damping material's local placement and properties are optimized to correct specific sound quality issues without compromising the overall thin profile of the device.
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 provides improved sound quality and pressure levels while minimizing space occupation and reducing damage risks, offering enhanced bass response and frequency reproduction.
Implementation Method 1
a vibration apparatus vibrating the vibration member
Data Source
AI summary
A sound apparatus can include a vibration member; a housing at a rear surface of the vibration member; a connection member disposed between the vibration member and the housing; and a vibration apparatus configured to vibrate the vibration member. The vibration apparatus can include at least one piezoelectric element for producing sound. Also, the connection member can have a first stiffness that is less than a second stiffness of the housing, and the vibration member can be isolated from the housing by the connection member.