Speaker Assembly with Nested Damper for Slim High Sound Pressure
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Solution Overview
Problem
Existing speaker assemblies for display devices face challenges in achieving high sound quality, slim structure, and maintaining high sound pressure levels while increasing amplitude.
Innovation Solution
A speaker assembly design featuring a pair of facing magnets, a bobbin with a voice coil, a diaphragm, and an elastic damper system that maximizes the range of motion and sound pressure, with a slim structure and improved sound reproduction band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If the speaker assembly uses a conventional structure to achieve high sound pressure level, then the sound pressure level is improved, but the thickness of the speaker assembly increases
Solution Approach 1:
The damper is integrated into the magnetic circuit structure, with the magnetic circuit unit serving as the outer structure and the damper positioned within the space between the magnetic circuit unit and the voice coil assembly. This nesting approach allows the damper to be accommodated without increasing the overall thickness of the speaker assembly, while still providing the necessary damping function to maintain high sound pressure levels.
Solution Approach 2:
The invention repositions the damper from a conventional location to a space within the magnetic circuit structure, utilizing the radial dimension between the magnetic circuit unit and voice coil assembly rather than increasing thickness in the axial dimension. This dimensional repositioning enables the damper to function effectively without increasing speaker assembly thickness.
2Reliability
If the speaker assembly increases amplitude to improve sound quality, then the sound quality is improved, but the structure becomes less slim
Solution Approach 1:
The damper is nested within the magnetic circuit structure, utilizing the radial space between the magnetic circuit unit and voice coil assembly. This allows the speaker to achieve high amplitude for improved sound quality without increasing the axial thickness, thereby maintaining a slim overall structure while enhancing sound reproduction capabilities.
3Length of stationary object
If the speaker assembly uses a slim structure to meet display device requirements, then the thickness is reduced, but the sound pressure level decreases
Solution Approach 1:
The damper is positioned within the radial space of the magnetic circuit structure, nested between the magnetic circuit unit and voice coil assembly. This nested configuration enables the speaker to maintain a slim axial profile while the damper provides enhanced acoustic damping that preserves high sound pressure levels despite the reduced overall thickness.
Solution Approach 2:
The invention changes the spatial parameters of the damper positioning, moving it from conventional locations to the radial space within the magnetic circuit. This parameter change allows the speaker to achieve both slim thickness and high sound pressure level by optimizing the damper's position rather than increasing overall dimensions.
4Reliability
If the speaker assembly increases the range of motion of the bobbin to improve amplitude, then the amplitude is improved, but the structural complexity increases
Solution Approach 1:
The magnetic circuit unit serves multiple functions: it provides the magnetic flux path necessary for voice coil operation and simultaneously serves as a structural housing that contains and positions the damper. This multi-functionality allows the speaker to achieve increased bobbin range of motion and improved amplitude without adding separate structural components, thereby avoiding increased structural complexity.
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 speaker assembly provides high sound quality, maintains high sound pressure levels, and increases amplitude, enhancing sound reproduction and pressure while maintaining a slim structure.
Implementation Method 1
a voice coil unit including a pair of magnets 40 facing each other; a bobbin 81 disposed between the pair of magnets 40... a coil 82 formed on at least one surface of the bobbin
Data Source
Figure 1
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AI summary
A speaker assembly, and a display device including the same are provided. The speaker assembly according to an aspect of the present disclosure includes: a pair of magnets facing each other; a bobbin disposed between the pair of magnets and formed in a shape of a plate that extends long; a coil formed on at least one surface of the bobbin; a diaphragm fixed to one side of the bobbin, and extending in a direction intersecting a longitudinal direction of the bobbin; a frame disposed between the pair of magnets and the diaphragm; and a speaker edge disposed between the frame and the diaphragm, having one end fixed to the frame and the other end fixed to the diaphragm, and being convexly curved toward the bobbin.