Motor Vehicle Headlight Projection Device with Segmented Diaphragms
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional motor vehicle headlight projection systems struggle to achieve uniform brightness transitions and comply with legal light intensity limits, leading to recognizable darkened areas that affect the overall light distribution impression.
Innovation Solution
The use of multiple groups of low-beam micro-optics with different diaphragm variants, including shading elements that protrude or are spaced apart, allows for precise control of light distribution to meet legal requirements and create uniform transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If shading elements are provided in the projection lens to reduce light intensity in certain areas, then the legal maximum light intensity values are met, but the brightness transition becomes non-uniform and darkened areas are clearly recognizable
Solution Approach 1:
The projection lens is divided into multiple zones with different diaphragm devices, each having specific shading elements positioned at different locations. This segmentation allows independent control of light intensity in different areas, enabling precise compliance with legal requirements while maintaining smooth brightness transitions across the entire light distribution.
Solution Approach 2:
Different diaphragm devices are assigned to different zones of the projection lens based on the specific light intensity requirements of each area. Each diaphragm device has shading elements positioned and sized differently to achieve the desired local light intensity reduction while ensuring uniform overall appearance. This local customization allows precise control without creating noticeable dark spots.
2Device complexity
If a single diaphragm device design is used for all micro-optics, then the device complexity is reduced, but the ability to precisely control light distribution and meet legal requirements is compromised
Solution Approach 1:
The patent establishes a modular diaphragm device design where multiple variants serve different functional requirements within the same system. Each variant is optimized for specific zones but all follow the same basic structural principles, allowing standardized manufacturing processes while achieving differentiated light control performance across the projection lens.
Solution Approach 2:
The patent varies key parameters of the diaphragm devices (such as shading element position, size, and shape) across different zones while maintaining the fundamental device architecture. This parameter differentiation enables precise light distribution control for each zone without requiring completely different device designs, thus balancing complexity and performance.
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 approach enables precise control over darkened areas, ensuring compliance with legal light intensity limits while maintaining uniform brightness transitions, enhancing the overall light distribution and reducing glare.
Implementation Method 1
each micro entry optics focusing the light passing through it into at least one micro entry optics focal point focused, wherein the focal point of the micro entry optics lies between the micro entry optics and the associated micro exit optics
Implementation Method 2
the light preformed by the micro entry optics is imaged by the micro exit optics in an area in front of the motor vehicle as at least one light distribution
Implementation Method 3
the at least one diaphragm device being set up to limit the light distribution imaged by the respective micro exit optics in such a way that the light distribution emitted by the micro exit optics forms a proportion of the low beam distribution
Data Source
Figure 1
Figure 2
Figure 3(a)~3(d)
AI summary
The invention relates to a projection device (1) for a motor vehicle headlight, wherein the projection device (1) is designed to project light of at least one light source (2) associated with the projection device (1) into a zone in front of the motor vehicle in at least one light distribution pattern, a total number of the low-beam microlenses comprising at least two groups of low-beam microlenses.