Motor Vehicle Light Module Boundary Disturbance Reduction
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Solution Overview
Problem
In motor vehicle lighting devices, existing light modules suffer from visible dark stripes and brightness gradients at the 'light/dark' boundary due to chromatic aberration and uneven light distribution between passing-light and high-beam sub-modules, which can cause blinding and aesthetic issues.
Innovation Solution
The light module aligns passing-light and high-beam sub-modules to share a common segment of the projection-lens system, with a deflecting element directing a majority of light beams from both sub-modules onto this segment, while a smaller portion is directed onto another segment for downward deflection, allowing for a compact projection-lens system and reduced disturbances at the 'light/dark' boundary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the high-beam sub-module and passing-light sub-module are arranged to produce partial light distributions that overlay to form a full-value high-beam light distribution, then the lighting device can provide both passing-light and high-beam functions, but a significantly visible dark stripe arises at the 'light/dark' boundary due to chromatic aberration of the projection lens
Solution Approach 1:
The projection lens is divided into multiple segments (first segment and second segment) with different optical characteristics. The first segment is optimized for passing-light beams while the second segment is optimized for high-beam beams, allowing each segment to minimize chromatic aberration for its specific beam type and eliminating the dark stripe at the boundary
Solution Approach 2:
Different regions of the projection lens are assigned different optical properties. The first segment has optical characteristics tailored for passing-light beams, while the second segment has characteristics tailored for high-beam beams, ensuring optimal performance and minimal chromatic aberration in each local region
2Illumination intensity
If the partial light distribution of the high-beam module is used to supplement the passing-light distribution, then a full-value high-beam light distribution is achieved, but a significantly more visible brightness gradient arises in the region of the 'light/dark' boundary
Solution Approach 1:
The projection lens is segmented into distinct regions that handle different beam types separately. This segmentation allows independent optimization of light distribution for each beam type, preventing the formation of visible brightness gradients at the boundary between passing-light and high-beam regions
3Device complexity
If a common projection-lens system is used for dimming light beams of all sub-modules, then the system structure is simplified, but chromatic aberration causes visible disturbances at the 'light/dark' boundary
Solution Approach 1:
The common projection lens is segmented into multiple zones with different optical properties. Each segment is designed to minimize chromatic aberration for specific beam types, maintaining system simplicity while eliminating chromatic distortion through localized optical optimization
Solution Approach 2:
Different segments of the projection lens are assigned different optical characteristics tailored to the specific requirements of passing-light beams and high-beam beams, allowing each local region to minimize chromatic aberration for its designated beam type
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 minimizes the visibility of the 'light/dark' boundary, reduces shadows and color fringes, and maintains high brightness values, resulting in a more precise and aesthetically improved full-value high-beam light distribution.
Implementation Method 1
a common projection-lens system (10) for dimming of light beams of all sub-modules in front of the motor vehicle
Implementation Method 2
a deflecting element that deflects a light-beam course of at least one of the sub-modules so that a deviated course of the beam paths arises
Data Source
AI summary
A light module of a lighting device comprises one passing-light sub-module for production of a dimmed-light distribution below a horizontal “light/dark” boundary, one high-beam sub-module for production of a light distribution above the boundary, a common projection-lens system for production of an overall light distribution, and one element deflecting a course of light beams of the sub-module(s) before it falls on the system. To realize the smallest system and a reduction of non-homogeneities in the overall light distribution in a region of the boundary, a majority of the light beams of the high-beam sub-module falls on a common segment of the system as a majority of the light beams of the passing-light sub-module, a smaller portion of the light beams of the high-beam sub-module falls on another segment of the system, and the system exhibits a deflector that deflects at least a portion of the light beams falling on the other segment downward.