Miniature Flat Panel Speaker Diaphragm With Segmented Sub-Coils
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Solution Overview
Problem
Current flat panel speakers face challenges in miniaturization, particularly in achieving high sensitivity and effective sound field extension for in-ear applications due to limitations in coil mass, thickness, and area, which affect sound quality and frequency response.
Innovation Solution
A transducer vibrating diaphragm structure for miniature flat panel speakers with a reduced dimension of less than 120 square millimeters, featuring a first and second coil skeleton with sub-coil circuits deposited on the diaphragm surfaces, utilizing conductive materials like gold, platinum, and magnetic elements, arranged in specific patterns to balance frequency response and sensitivity, ensuring a sensitivity greater than 105 dB.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the vibrating diaphragm is miniaturized for in-ear applications, then the device size is reduced, but the sensitivity and sound field extension deteriorate
Solution Approach 1:
The patent divides the coil structure into multiple segments (first coil and second coil) arranged in different directions. This segmentation allows the compact speaker to achieve balanced frequency response by having coil segments oriented to optimize both low-frequency and high-frequency performance, resolving the contradiction between miniaturization and sensitivity maintenance.
Solution Approach 2:
The patent applies different coil configurations to different regions of the vibrating diaphragm. The first coil and second coil are arranged with specific orientations and densities in different areas, creating local optimizations that collectively enhance overall sensitivity and sound field extension while maintaining the miniaturized form factor.
2Speed
If the coil mass is reduced to improve transient response, then the high-frequency response improves, but the low-frequency response deteriorates
Solution Approach 1:
The patent segments the coil system into multiple coils with different orientations and mass distributions. This allows the overall coil mass to be optimized for transient response while individual coil segments contribute differently to frequency ranges, with some segments optimized for low-frequency response and others for high-frequency response.
Solution Approach 2:
The patent employs asymmetric coil arrangements where the first coil and second coil have different configurations, orientations, and positions relative to the vibrating diaphragm. This asymmetric design enables differentiated frequency response characteristics from each coil, allowing the system to achieve balanced overall performance despite reduced total mass.
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 enables a flat panel speaker to achieve a larger sound field and improved sound quality, capable of being used in in-ear earplugs, with balanced low and high-frequency responses and enhanced transient characteristics, while maintaining structural integrity and sensitivity.
Implementation Method 1
the first sub-coil circuit and the second sub-coil circuit are correspondingly provided with a first magnetic skeleton and a second magnetic skeleton on which a first magnetic element and a second magnetic element are correspondingly arranged
Implementation Method 2
the first sub-coil circuit and the second sub-coil circuit are deposited on the first surface and the second surface of the vibrating diaphragm through vapor deposition or liquid deposition
Implementation Method 3
the first sub-coil circuit and the second sub-coil circuit are deposited on the first surface and the second surface of the vibrating diaphragm through vapor deposition or liquid deposition
Data Source
AI summary
An earphone comprising a transducer vibrating diaphragm structure is described herein. The transducer vibrating diaphragm structure comprises a diaphragm including a first surface and a second surface opposite the first surface, a first frame and a second frame disposed at two sides of the diaphragm and coupled to a periphery of the diaphragm, a first magnetic element and a second magnetic element disposed to correspond to the first surface and the second surface, respectively. A total area of the diaphragm is less than or equal to 120 square millimeters and a sensitivity of the diaphragm is greater than 105 dB.