Light Guide Plate Structure for Uniform Vehicle Logo Illumination
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Solution Overview
Problem
Existing vehicle logos cannot be lit up efficiently, requiring numerous light sources that occupy large spaces, are costly, and lack uniform lighting.
Innovation Solution
A light guide plate design with a light guide plate body featuring a light incident portion, a recessed portion with a reflecting surface, and a light guide tooth pattern, which reflects light uniformly across a light emitting surface, reducing the number of light sources and enhancing optical efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light sources are arranged to fully fill the entire logo inside the logo, then the logo can be lit up, but the space occupied is large and the cost is high
Solution Approach 1:
The patent divides the light guide plate into multiple regions with different refractive indices by setting light guide teeth at specific positions. This segmentation allows different areas to guide light in different directions, enabling uniform logo illumination with fewer light sources arranged in a line rather than distributed across the entire logo area
Solution Approach 2:
The patent applies local quality by creating regions with different optical properties through light guide teeth structures. Specific areas of the light guide plate have modified refractive indices to control light distribution, allowing concentrated light sources to produce uniform illumination across the entire logo area through localized optical manipulation
2Illumination intensity
If light sources are arranged to fully fill the entire logo inside the logo, then the logo can be lit up, but the lighting uniformity is poor
Solution Approach 1:
The light guide plate is segmented into multiple optical zones using light guide teeth, where each zone has a specific refractive index designed to redirect light in predetermined patterns. This segmentation enables precise control over light distribution, achieving uniform illumination across the logo without the poor uniformity associated with traditional approaches
Solution Approach 2:
The patent changes the refractive index parameter of the light guide plate material in different regions by incorporating light guide teeth structures. By varying the refractive index across different zones, the system controls light propagation and reflection to achieve uniform logo illumination, transforming the uniform material property into a spatially varying optical property
3Illumination intensity
If a large number of light sources are used to light up the logo, then the logo can be lit up, but the cost is high
Solution Approach 1:
The light guide plate is divided into multiple optical zones with different refractive indices through light guide teeth structures. This segmentation allows a small number of light sources arranged in a line to illuminate the entire logo area uniformly by redirecting light through different optical paths in different zones, eliminating the need for expensive arrays of multiple light sources
Solution Approach 2:
The light guide plate acts as an intermediary between the light sources and the logo. By incorporating light guide teeth that create regions with different refractive indices, the light guide plate mediates light distribution, transforming light from a small number of sources into uniform illumination across the entire logo area, thereby reducing the number of light sources needed
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 design achieves uniform lighting with fewer light sources, reducing costs and improving optical efficiency while increasing the light-emitting area.
Implementation Method 1
a wall surface at the recessed portion is configured to be a reflecting surface; light incident into the light incident portion is adapted to be reflected by the reflecting surface to a side of the light guide plate body
Implementation Method 2
reflected by the light guide tooth pattern on the side and emitted out of the light emitting surface
Data Source
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AI summary
The present application relates to a signal lamp, and discloses a light guide plate. The light guide plate comprises a light guide plate body, wherein front and rear sides of the light guide plate body in a thickness direction are a first side and a second side respectively; one of the first side and the second side is provided with a light incident portion, and the other of the first side and the second side is partially recessed inward to form a recessed portion; the recessed portion is arranged corresponding to the light incident portion, and a wall surface of the recessed portion is configured to be a reflecting surface; one of the first side and the second side is formed as a light emitting surface, and the other of the first side and the second side is provided with a light guide tooth pattern; light incident into the light incident portion is adapted to be reflected by the reflecting surface to a side of the light guide plate body, and then reflected by the light guide tooth pattern on the side and emitted out of the light emitting surface. In addition, the present application further provides a signal lamp and a vehicle. The light guide plate can realize uniform light distribution and improve optical efficiency, and has a low cost.