Multi-layer Vehicle Light Guide for Uniform Illumination
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Solution Overview
Problem
Conventional light guides for vehicles suffer from light loss and the generation of dark portions, leading to reduced brightness and increased complexity, power consumption, and design constraints, which affect lighting sensitivity and aesthetic appeal.
Innovation Solution
The implementation of a multi-layer light guide system with first, second, and optionally third light guides, featuring diffusion holes and curved surfaces to guide and diffuse light uniformly, preventing hot spots and dark areas, while allowing for improved design flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional single light guide is used to guide light from the LED source, then the structure is simple, but light loss occurs and dark portions are generated reducing brightness uniformity
Solution Approach 1:
The patent divides the light guide system into multiple separate light guides (first light guide, second light guide, and optionally third light guide) instead of using a single light guide. Each light guide has its own light source and guides light independently, which prevents light loss and dark portions by distributing the lighting paths, thereby improving brightness uniformity while maintaining reasonable structural complexity through modular design.
Solution Approach 2:
The patent arranges multiple light guides in different spatial dimensions and positions (first light guide at first position, second light guide at second position, third light guide at third position) to create a multi-dimensional lighting distribution system. This spatial arrangement ensures comprehensive light coverage and eliminates dark portions by illuminating from multiple directions and planes.
2Illumination intensity
If an invalid portion is added to prevent hot spots, then lighting uniformity improves, but device complexity and manufacturing time increase
Solution Approach 1:
Instead of adding complex invalid portions to a single light guide, the patent segments the lighting system into multiple independent light guides, each with its own light source. This segmentation naturally distributes light intensity and eliminates hot spots without requiring additional invalid portions, thereby maintaining lighting uniformity while simplifying the manufacturing process.
Solution Approach 2:
The patent extracts the hot spot prevention function from the light guide structure itself and implements it through separate light guide units with independent light sources. By taking out the need for invalid portions and replacing it with multiple independent lighting paths, the system achieves lighting uniformity without increasing manufacturing complexity.
3Illumination intensity
If multiple light guides are used to prevent light loss and dark portions, then lighting uniformity improves, but device complexity increases
Solution Approach 1:
The patent divides the lighting system into multiple segmented light guide units, each independently guiding light from its own light source. This segmentation prevents light loss and eliminates dark portions by ensuring multiple independent lighting paths cover the entire illumination area, achieving superior lighting uniformity through distributed illumination.
Solution Approach 2:
The patent combines multiple light guide units (first light guide, second light guide, and optionally third light guide) into an integrated lighting system where each unit contributes to the overall illumination. By merging these independent light guides into a coordinated system, the patent achieves comprehensive light coverage and uniformity while managing device complexity through systematic integration.
4Illumination intensity
If a single light source is used in the light guide, then power consumption is low, but lighting coverage and uniformity are limited
Solution Approach 1:
The patent divides the lighting system into multiple segments, each with its own light source (first light source, second light source, and optionally third light source). This segmentation expands lighting coverage by distributing multiple light sources across different positions, ensuring comprehensive illumination without requiring excessive power consumption from a single high-power source.
Solution Approach 2:
The patent arranges multiple light sources and light guides in different spatial dimensions and positions, creating a multi-dimensional illumination distribution. This spatial arrangement expands lighting coverage area and improves uniformity by illuminating from multiple directions, achieving broader coverage while maintaining reasonable power consumption through distributed low-power sources.
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 solution enhances lighting uniformity, reduces power consumption, and increases design freedom by minimizing light loss and hot spots, thereby improving the overall efficiency and aesthetic appeal of vehicle lighting systems.
Implementation Method 1
A light guide is a component which provides a path for uniformly scattering and diffusing a light emitted from a light source
Implementation Method 2
the light incident from the LED light source is converted into surface light through the light guide and then is emitted
Implementation Method 3
a curved reflective surface extending from the first incident portion and configured to reflect the light incident on the first incident portion
Data Source
AI summary
A light guide may include a light source configured to emit light, a first light guide configured to guide the light emitted from the light source, and a second light guide disposed outside the first light guide and configured to guide the light.