Jagged Protrusion Light Guide for Headlight Beam Contour Control
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Solution Overview
Problem
Current LED headlight modules fail to effectively adjust beam contour and luminance distribution to comply with regulations and reduce glare, particularly affecting the vision of oncoming drivers due to the Blue field entoptic phenomenon caused by blue light refraction.
Innovation Solution
A light guide structure with jagged protrusions is designed, featuring a middle section and side sections with triangular protrusions that intersect the light emitting direction, allowing for adjustable beam contours and reduced luminance to mitigate glare and improve visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional light guides are used in LED headlight modules, then the lighting structure is simple, but the beam contour and luminance distribution cannot be effectively adjusted to comply with regulations and reduce glare
Solution Approach 1:
The light guide structure is divided into multiple functional sections: a first light guide section with a first surface and a second light guide section with a second surface. Each section can be independently designed with different surface characteristics (smooth vs. rough) to control light distribution in different regions, enabling versatile beam contour adjustment while maintaining a relatively simple overall structure.
Solution Approach 2:
Different surface qualities are applied to different regions of the light guide. The first light guide section has a smooth first surface for uniform light emission, while the second light guide section has a rough second surface for diffuse light distribution. This local differentiation allows precise control over beam contour and luminance distribution without requiring complex adjustment mechanisms throughout the entire structure.
2Illumination intensity
If blue light is used in LED headlights, then the lighting efficiency and visibility are improved, but the Blue field entoptic phenomenon causes glare affecting oncoming drivers
Solution Approach 1:
The rough second surface of the second light guide section, which could be considered a simple structural feature, effectively scatters blue light to reduce the Blue field entoptic phenomenon. This converts the potential harmful glare effect into a beneficial diffuse light distribution that maintains visibility while reducing glare for oncoming drivers, complying with regulatory requirements.
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 light guide structure with jagged protrusions enhances beam contour control, reduces luminance to prevent glare, and minimizes the Blue field entoptic phenomenon, ensuring safer driving conditions by optimizing light distribution and refraction patterns.
Implementation Method 1
The light guide structure with jagged protrusions comprises a light injecting surface and a light emitting surface... the jagged protrusions being configured to the light guiding area to adjust corresponding beam contours
Data Source
AI summary
A light guide structure with jagged protrusions is configured in a lighting device of a mobile vehicle. The light guide structure includes a light injecting surface and a light emitting surface. The light emitting surface includes a middle section and two side sections deployed respectively at opposite ends of the middle section. The side sections have a plurality of jagged protrusions forming a light guiding area. The extending direction of the jagged protrusions intersects with the light emitting direction. A light source module forms an irradiation area by the light guide structure, the light guiding area extending the width of both sides of the irradiation area, the beam contour being enlarged evenly. The disclosure also provides a headlight structure, a light source module having the light guide structure and a convex lens configured sequentially in the light emitting direction.