Cap Illumination via Diaphragm Light Transmission
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Solution Overview
Problem
Existing audio speakers that incorporate light sources for illumination face challenges in maintaining small space requirements and avoiding heat-induced degradation of the light source, especially in compact environments like vehicles.
Innovation Solution
The audio speaker design incorporates a circuit board with light sources positioned between the magnet and the diaphragm, utilizing transparent areas in the diaphragm to emit light efficiently while minimizing space and avoiding heat exposure to the light sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light source is added to the speaker for illumination, then the speaker can be illuminated, but the space requirements are greatly increased
Solution Approach 1:
The patent combines the light source with the existing circuit board structure, integrating the illumination function into the existing speaker assembly rather than adding a separate illumination module. This merging approach allows the light source to be positioned in the available space between the magnet and diaphragm, achieving illumination without significantly increasing the overall speaker volume.
Solution Approach 2:
The light source is nested within the existing speaker structure, specifically positioned in the space between the magnet and diaphragm. This nesting approach utilizes otherwise unused internal space, allowing the illumination function to be embedded within the speaker's existing volume constraints.
2Illumination intensity
If the light source is positioned close to the voice coil for efficient illumination, then illumination efficiency is improved, but the light source is heated by the voice coil and currents, decreasing its lifetime
Solution Approach 1:
The patent introduces the circuit board as an intermediary structure that positions the light source in the space between the magnet and diaphragm. This intermediary positioning allows the light source to be close enough to the diaphragm for efficient illumination while being sufficiently distant from the voice coil to avoid thermal damage, thus protecting the light source lifetime.
Solution Approach 2:
The patent applies different spatial positioning strategies to different components: the light source is positioned in the thermally favorable region between the magnet and diaphragm, while the voice coil maintains its position in the magnetic field gap. This local quality differentiation optimizes both illumination efficiency and thermal protection simultaneously.
3Reliability
If the light source is positioned away from the voice coil to avoid heating, then light source lifetime is improved, but illumination efficiency of the diaphragm is reduced
Solution Approach 1:
The circuit board serves as an intermediary that enables the light source to be positioned optimally - far enough from the voice coil to avoid thermal damage but close enough to the diaphragm to maintain illumination efficiency. This intermediary positioning resolves the contradiction between thermal protection and illumination effectiveness.
Solution Approach 2:
The patent utilizes the vertical dimension between the magnet and diaphragm to position the light source, creating a three-dimensional optimization where the light source is positioned in the Z-direction between these components. This dimensional approach allows simultaneous optimization of thermal distance and illumination distance.
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
This configuration allows for efficient illumination of the diaphragm with minimal space usage and effectively prevents heat from the voice coil and currents from affecting the light sources, thereby enhancing the speaker's performance and longevity.
Implementation Method 1
the circuit board comprises at least one light source configured to emit light in the main sound emitting direction and configured to illuminate, in direction of the main sound emitting direction, a lower surface of the diaphragm
Implementation Method 2
The diaphragm furthermore comprises a plurality of transparent areas configured to let pass the light from the at least one light source
Implementation Method 3
a magnet configured to generate a magnetic field in which the voice coil is moving
Implementation Method 4
causing movements of a movable diaphragm by means of a voice coil connected to the diaphragm
Data Source
AI summary
Techniques for cap illumination include an audio speaker configured to emit sound in a main sound emitting direction. The audio speaker includes a voice coil, a diaphragm connected to the voice coil and configured to move together with the voice coil parallel to the main sound emitting direction, a magnet configured to generate a magnetic field in which the voice coil is moving, and a circuit board located between the magnet and the diaphragm. The circuit board includes one or more light sources configured to emit light in the main sound emitting direction and illuminate a surface of the diaphragm facing the circuit board. The diaphragm includes a plurality of transparent areas that permit light from the at least one light source to pass through the diaphragm.