Vehicle Headlamp Light Guide Mixing Portion
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Solution Overview
Problem
Vehicle headlamps with light pipes face issues of light loss, structural integrity, and dark spots due to bends and twists, which affect lumen output and regulatory compliance.
Innovation Solution
A vehicle headlamp assembly with a light guide featuring a mixing portion, input portions, and elongated light emitting portions, along with reflectors, to guide light from multiple sources and ensure continuous output, reducing dark spots and enhancing structural robustness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If light pipes include bends and twists to achieve desired lighting patterns, then lighting flexibility is improved, but light loss increases and structural integrity deteriorates
Solution Approach 1:
The light guide is divided into multiple light-emitting portions (first, second, third, fourth portions) with distinct functions. Each portion emits light at different positions along the guide, segmenting the light transmission path to reduce cumulative light loss while maintaining bending capability.
Solution Approach 2:
The light guide utilizes a multi-dimensional structure with light entering at one end and emitting at multiple positions along its length. The guide extends in multiple spatial dimensions, allowing bends and twists to achieve desired lighting patterns while maintaining structural integrity through the mixing portion.
2Adaptability or versatility
If light pipes include bends and twists to achieve desired lighting patterns, then lighting flexibility is improved, but structural integrity deteriorates
Solution Approach 1:
The mixing portion merges the light paths from different input portions, creating a unified structure that maintains structural integrity. The mixing portion acts as a structural hub that connects multiple light-emitting portions, providing mechanical strength while allowing the overall guide to achieve desired bends and twists.
Solution Approach 2:
The light guide is formed from a translucent material that provides both optical transparency for light transmission and mechanical strength for structural integrity. The material composition allows the guide to maintain rigidity while accommodating bends and twists in its configuration.
3Adaptability or versatility
If light pipes are spaced apart to create desired patterns, then lighting design flexibility is improved, but dark spots appear due to gaps between pipes
Solution Approach 1:
The light guide provides continuous light emission along its length through multiple light-emitting portions. The mixing portion ensures continuous light flow by merging light paths, eliminating gaps and dark spots between separate light pipes while maintaining design flexibility.
Solution Approach 2:
The mixing portion merges light from multiple input portions, creating a continuous light field that eliminates dark spots. This merging function ensures uniform illumination across the entire guide structure while allowing flexible spacing and positioning of light-emitting portions.
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 solution provides a harmonic and continuous light flow while maintaining structural integrity, meeting regulatory standards by minimizing light loss and eliminating dark spots between light emitting sections.
Implementation Method 1
The one or more light pipes may conduct light generated via a light source (e.g., an LED) from a first end of the one or more light pipes toward a second end of the one or more light pipes
Implementation Method 2
The light conducted from the first end of the one or more light pipes toward a second end of the one or more light pipes is emitted through the one or more light pipes and through the headlamp
Implementation Method 3
The reflectors guide light from the first and second input portions into the mixing portion, and the mixing portion guides light through the front side thereof to provide continuous light output between the third ends of the first and second light emitting portions
Data Source
AI summary
A light guide includes first and second input portions, first and second light emitting portions and a mixing portion. The mixing portion extends between the first input portion and the first light emitting portion, and between the second input portion and the second light emitting portion. Light generated by a first light source is guided from the first input portion toward the first light emitting portion, and light generated by a second light source is guided from the second input portion toward the second light emitting portion. The mixing portion is configured to receive light guided from the first input portion toward the first light emitting portion and configured to receive light guided from the second input portion toward the second light emitting portion.