Motor Vehicle Headlight Aperture for Edge Image Quality
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Solution Overview
Problem
Existing motor vehicle headlight light modules with matrix LEDs and projection lenses suffer from decreased image quality at the edges due to the use of fewer, cost-effective lens elements, lacking the flexibility to optimize optical imaging properties.
Innovation Solution
Incorporating an aperture between the matrix light source and the first individual lens in the lens system, designed to selectively affect edge regions of the light distribution, reducing light intensity by 30-60% in edge areas while maintaining image quality in the center, and allowing for reduced lens diameter and weight savings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the projection lens is constructed from fewer individual lens elements to reduce weight and cost, then manufacturing cost and weight are reduced, but image quality at the edges deteriorates significantly
Solution Approach 1:
The aperture is divided into multiple separate aperture elements (first aperture element, second aperture element, third aperture element) that can be independently designed and positioned. This segmentation allows each element to address specific edge region issues without requiring a complete redesign of the entire lens system, thereby improving edge image quality while maintaining cost-effectiveness.
Solution Approach 2:
The aperture elements are strategically positioned to affect only specific edge regions of the light distribution. The first aperture element addresses one edge region while the second and third elements address other edge regions, allowing localized optimization of image quality without compromising the overall system performance or requiring additional lens elements throughout the entire system.
2Ease of manufacture
If the projection lens is constructed from fewer individual lens elements to reduce weight and cost, then manufacturing cost and weight are reduced, but the optical imaging properties cannot be optimized
Solution Approach 1:
The aperture elements serve as intermediary components between the lens elements and the light distribution. These intermediaries modify the light paths in specific edge regions, enabling optimization of optical imaging properties without requiring additional complex lens elements. The aperture elements act as mediators that provide the necessary optical adjustment to achieve desired imaging properties.
Solution Approach 2:
Instead of adding more lens elements in the traditional optical path dimension, the invention introduces aperture elements that operate in a different dimensional approach by controlling light distribution patterns. This allows optimization of optical imaging properties through a different mechanism that does not increase the number of lens elements, thereby maintaining cost-effectiveness while improving adaptability.
3Manufacturing precision
If the aperture is designed to reduce light intensity in edge regions, then imaging properties in edge regions are improved, but light intensity in those regions is reduced by 30-60%
Solution Approach 1:
The aperture elements are designed with specific geometries and positions that selectively modify light intensity parameters in edge regions. By carefully controlling the size, shape, and positioning of each aperture element, the system achieves improved imaging properties through controlled parameter changes that reduce light intensity only to the extent necessary for optimization, rather than applying uniform reduction across all regions.
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
Improves imaging properties in edge regions and overall efficiency, reduces scattered light, and allows for cost-effective integration, maintaining image quality in the center while minimizing material costs.
Implementation Method 1
a diaphragm (24) introduced into the beam path between the matrix light source (12) and a first individual lens (16) of the lens system (14), which diaphragm (24) is designed to have a selective effect on edge regions of the imaged light distribution of the light module (10)
Implementation Method 2
a lens system (14) for imaging the light points generated by the matrix light source (12) on a roadway in front of the motor vehicle
Data Source
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AI summary
The invention relates to a light module (10) of a motor vehicle headlight (100), comprising: - a matrix light source (12) with a plurality of several matrix-like arranged, individually controllable individual light sources, which, depending on their control, each emit more or less light to generate a single light point, and - a lens system (14) for imaging the light points generated by the matrix light source (12) onto a roadway in front of the motor vehicle to generate a resulting light distribution of the light module (12), wherein the lens system (14) comprises several individual lenses (16, 18, 20) arranged one behind the other in a beam path.It is proposed that the light module (12) includes an aperture (24) placed in the beam path between the matrix light source (12) and a first single lens (16) of the lens system (14), which is designed to have a selective effect on edge regions of the imaged light distribution of the light module (12).