Dual Driving Unit Speaker Reducing Distortion
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Solution Overview
Problem
Conventional earphone devices face limitations in achieving higher quality and higher output of driving sound due to their structural constraints.
Innovation Solution
A speaker device is designed with a cylindrical body frame supporting a vibrating film, featuring a first driving unit with a cup-shaped magnetic yoke and cylindrical coil, and a second driving unit with a ring-shaped yoke and coil, both configured to drive the vibrating film in the same direction with the same voice signal, reducing distortion and enhancing sound quality and output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single driving unit is used in conventional earphone devices, then the structure is simple, but the sound quality and output are limited
Solution Approach 1:
The single driving unit is segmented into two separate driving units (first and second driving units), each with its own coil, magnet, and yoke structure. This segmentation allows independent optimization of each unit's performance characteristics, enabling higher sound quality and output while managing complexity through modular design
Solution Approach 2:
Two driving units are merged to work together on the same vibrating film, combining their output to achieve higher sound quality and volume. The merging of multiple driving forces on a single vibrating film creates synergistic effects that improve overall acoustic performance
2Manufacturing precision
If a single driving unit is used, then the device is simple to manufacture, but distortion cannot be minimized
Solution Approach 1:
The driving function is segmented into two separate driving units that can be manufactured independently using standardized processes. Each unit can be produced with consistent quality control, and the segmentation allows for specialized manufacturing techniques to minimize distortion in each unit
Solution Approach 2:
By changing the number of driving units from one to two, the system can operate at optimized parameter levels for each unit, reducing individual unit distortion and achieving lower overall distortion through the combined operation of both units
3Force
If conventional single driving unit structure is used, then the magnetic flux density is insufficient, but adding more components increases complexity
Solution Approach 1:
Two magnetic driving systems are merged to act on the same vibrating film, combining their magnetic flux density to achieve higher overall force output. The merged system delivers superior magnetic flux density without requiring individual units to be excessively complex
Solution Approach 2:
The magnetic driving force is applied from two different dimensions or orientations (first and second driving units positioned differently relative to the vibrating film), creating a combined three-dimensional magnetic flux distribution that enhances overall magnetic flux density and reduces distortion
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 dual driving unit configuration achieves higher quality and higher output of driving sound by minimizing distortion and improving magnetic flux density, resulting in clearer and louder sound production.
Implementation Method 1
a cylindrical coil fixed to the vibrating film on one surface side, and inserted into an outer periphery of the magnet, with a slight space provided between them
Implementation Method 2
the first coil and the second coil are connected in parallel to each other and are supplied with a voice signal, thereby the vibrating film is vibrated and driven
Data Source
AI summary
A vibrating film 47 is supported by a cylindrical body frame 31, and a first driving unit 61 for driving the vibrating film 47 based on an applied voice signal, is disposed in the body frame 31 on one surface side of the vibrating film 47, and a second driving unit 75 for driving the vibrating film 47 in the same direction as a vibrating direction of the vibrating film 47 driven by the first driving unit 61 based on the applied voice signal, is disposed in the body frame 31 on the other surface side of the vibrating film 47.