Piezoelectric Vibration Structure With Direct Signal-Line Connection
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Solution Overview
Problem
Existing vibration apparatuses with piezoelectric elements require complex manufacturing processes and structures, and there is a need for slim and thin speakers that maintain sound quality.
Innovation Solution
A vibration apparatus with a structure comprising overlapping first and second vibration portions, covered by first and second cover members, and connected by signal lines, which simplifies the manufacturing process and maintains sound characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If general vibration apparatuses use patterned lines and pad electrodes with soldering processes, then electrical connection is achieved, but manufacturing complexity increases and sound characteristics deteriorate due to high surface resistance
Solution Approach 1:
The patent extracts and eliminates the soldering process and patterned line structures from the vibration apparatus manufacturing. Instead of using traditional patterned electrodes requiring soldering, the invention uses a simplified electrode configuration that directly connects to the piezoelectric element terminals, removing the harmful soldering step while maintaining reliable electrical connection
Solution Approach 2:
The patent inverts the traditional approach by eliminating the patterned electrode design and soldering process. Rather than creating complex patterns and soldering connections, the invention uses a simplified direct connection method where electrodes are formed without patternning, and connections are made without soldering, thereby reducing manufacturing complexity and improving sound characteristics
2Reliability
If patterned lines and pad electrodes are used on the film, then electrical connection is established, but manufacturing time and process complexity increase
Solution Approach 1:
The patent removes the time-consuming patternning process and soldering steps from the manufacturing sequence. By using a simplified electrode structure that does not require patternning and a connection method that eliminates soldering, the manufacturing time is significantly reduced while maintaining reliable electrical connection
Solution Approach 2:
The patent performs preliminary actions by pre-forming the electrode structure in a simplified manner before final assembly, eliminating the need for subsequent patternning and soldering operations. This preliminary configuration of electrodes allows for direct connection without additional time-consuming 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 simplified structure reduces manufacturing complexity while minimizing sound degradation despite using electrodes with high surface resistance.
Implementation Method 1
piezoelectric elements capable of realizing a thin thickness are attracting much attention
Implementation Method 2
a first vibration portion (10A) and a second vibration portion (10B) overlapping the first vibration portion
Data Source
AI summary
The vibration apparatus may include a vibration generating portion including a first vibration portion and a second vibration portion overlapping the first vibration portion, a first cover member at a first surface of the vibration generating portion, a second cover member at a second surface different from the first surface of the vibration generating portion, and a signal cable including first, second and third signal lines connected to the first vibration portion and the second vibration portion and disposed between the first cover member and the second cover member. An apparatus for vibration may include a passive vibration member and the vibration apparatus.