Flexible Roll-to-Roll Speaker Manufacturing
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Solution Overview
Problem
Conventional speaker manufacturing processes result in bulky, expensive, and inflexible speakers with limited efficiency, particularly due to rigid piezoelectric materials and complex assembly requirements, making them unsuitable for portable or customizable applications.
Innovation Solution
A roll-to-roll manufacturing method for speakers involving the formation of conductive layers and supporting members on electrodes and membranes, allowing for flexible designs and reduced manufacturing costs through processes like stamping, die casting, and bonding, enabling the production of flexible, thin, and customizable speakers with improved frequency response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If piezoelectric materials formed by sintering processes are used, then speakers can operate with thin or planar designs, but the materials become rigid and inflexible
Solution Approach 1:
The patent changes the material parameter from traditional sintered piezoelectric materials to electroactive polymer materials, which fundamentally alters the mechanical properties from rigid to flexible while maintaining the piezoelectric effect for thin speaker design
Solution Approach 2:
The patent uses composite material structures including flexible substrates, electroactive polymer layers, and electrode configurations to achieve both thin profile and flexibility simultaneously
2Productivity
If conventional speaker manufacturing processes are used, then speakers can be mass-produced with fixed sizes and shapes, but the speakers become bulky and expensive
Solution Approach 1:
The patent employs flexible thin film structures for the speaker membrane and substrate, enabling thin-profile speakers that can be manufactured in various shapes and sizes while maintaining mass production capability through standardized flexible component fabrication
Solution Approach 2:
The patent introduces flexible and adaptable manufacturing approaches that allow speaker geometry and size to be dynamically adjusted during production, moving away from fixed rigid molds to processes that accommodate variable configurations
3Reliability
If dynamic or magnetic-membrane speakers are used, then well-developed technologies can be utilized, but the speakers have large sizes making them unsuitable for portable applications
Solution Approach 1:
The patent replaces the traditional dynamic/magnetic mechanical system with an electroactive polymer system that uses electrical fields to generate mechanical motion, eliminating bulky magnets and voice coils while achieving compact thin-profile designs
Solution Approach 2:
The patent fundamentally changes the actuation mechanism from electromagnetic to electroactive polymer-based, enabling compact sizes while maintaining reliable operation through well-established electroactive polymer technology
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 method enables the cost-effective production of flexible speakers with large membrane areas, irregular shapes, and customizable characteristics, reducing fabrication costs and improving frequency response while using lower driving voltages, making them suitable for portable and diverse applications.
Implementation Method 1
The electrostatic force generated by the positive and negative fields may drive the conductive membrane to generate sound
Implementation Method 2
utilizing electret membranes that can operate with low driving voltages
Data Source
AI summary
A method of making a speaker may be performed partially or completely in a roll-based processing. The method includes: providing an electrode; providing a membrane, which is treated to form an electret membrane by performing a ferroelectric process with a controlled external condition including at least one of humidity and temperature conditions; forming a conductive layer on the membrane; forming first supporting members on one of the electrode and the membrane; providing a substrate; forming second supporting members on one of the substrate and the membrane; and combining the electrode, the membrane, and the substrate to provide a first chamber and a second chamber, and the first supporting members are disposed between the electrode and the membrane in the first chamber and the second supporting members are disposed between the substrate and the membrane in the second chamber.