Loudspeaker Diaphragm Light Guide Uniform Illumination
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Solution Overview
Problem
Conventional loudspeakers with illumination functions often suffer from uneven brightness due to obstructive support bodies or insufficient light source to diaphragm distance, leading to suboptimal illumination quality.
Innovation Solution
The loudspeaker design incorporates a light-emitting element, a diaphragm with a reflecting surface, and a voice coil bobbin configuration that allows light to enter the diaphragm, diffuse, and reflect uniformly, eliminating uneven brightness by positioning the light-emitting element to face the diaphragm's inner circumferential end and using a light guide with a reflecting surface to ensure even illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light source is disposed in front of the diaphragm with a support body, then illumination function is provided, but uneven brightness occurs due to obstructive support bodies
Solution Approach 1:
The patent removes the support body that obstructs light paths in conventional designs. By extracting this harmful component, the light can travel directly from the light-emitting element to the diaphragm without obstruction, eliminating the uneven brightness caused by support structures while maintaining the illumination function.
Solution Approach 2:
The patent introduces a light guide as an intermediary component between the light-emitting element and the diaphragm. This light guide mediates the light transmission, guiding and distributing light uniformly across the diaphragm surface, thereby achieving even illumination without requiring obstructive support bodies.
2Illumination intensity
If a light source is disposed close to the diaphragm, then illumination function is provided, but uneven brightness occurs due to insufficient light source to diaphragm distance
Solution Approach 1:
The light guide serves as a mediator that extends the optical path between the light-emitting element and the diaphragm. By incorporating this intermediary component, the patent achieves sufficient light source to diaphragm distance for uniform illumination without placing the light source too close, thereby eliminating uneven brightness while maintaining illumination effectiveness.
3Illumination intensity
If a light source is disposed at the back of the diaphragm, then illumination function is provided through transmission, but the diaphragm structure becomes more complex
Solution Approach 1:
Instead of placing the light source at the back of the diaphragm and relying on light transmission through the diaphragm material, the patent inverts the approach by placing the light-emitting element in front of the diaphragm. This inversion simplifies the diaphragm structure by eliminating the need for complex light transmission paths while still achieving effective illumination through the light guide and reflecting surface.
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 achieves high-quality, uniform illumination by diffusing and reflecting light within the diaphragm, enhancing the brightness and reducing variations, thereby improving the overall illumination quality.
Implementation Method 1
a light guide having a reflecting surface formed and provided at a position where light enters from the end face
Implementation Method 2
the light entering the end face of inner circumferential end from the light-emitting element diffuses while being reflected inside the diaphragm
Data Source
AI summary
A loudspeaker includes a light-emitting element, a frame, a magnetic circuit provided with a magnetic gap, a diaphragm, a voice coil bobbin, and a voice coil. The diaphragm has an inner circumferential end including an end face facing the light-emitting element, and a light guide having a reflecting surface formed thereon and provided at a position where light enters from the end face. The first end of the voice coil bobbin is joined to the inner circumferential end of the diaphragm, and the second end is inserted into the magnetic gap. The voice coil is wound around the second end of the voice coil bobbin. Light from the light-emitting element enters the end face of the diaphragm, is diffused by the light guide, and is reflected on the reflecting surface.