Vehicle Headlight Projection Device Using Segmented Micro-Optics
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Solution Overview
Problem
Conventional micro-projection systems for motor vehicle headlights face challenges in meeting scattered light requirements due to miniaturization and high tolerance needs, particularly in creating the desired light distribution for low beam and signlight, which is difficult to achieve with traditional prism lenses.
Innovation Solution
The use of multiple groups of low-beam micro-optics with different diaphragm devices, including a second variant with partially translucent windows, allows for precise control of light distribution above the light-dark boundary, enabling effective illumination of traffic signs and reducing glare.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional prism lenses are used to meet scattered light requirements, then light distribution control is achieved, but device depth and complexity increase significantly
Solution Approach 1:
The patent divides the projection device into multiple groups of micro-optics (first group without aperture devices, second group with aperture devices having translucent windows). This segmentation allows different regions to handle different light distribution functions, replacing the need for complex traditional prism lenses while meeting scattered light requirements.
Solution Approach 2:
The patent applies different aperture device designs to different groups of micro-optics based on local requirements. The second group of micro-optics uses aperture devices with translucent windows specifically in regions where scattered light control is needed, while the first group uses simpler aperture devices, optimizing both scattered light compliance and device simplicity.
2Length of moving object
If miniaturization is applied to reduce device size, then device depth is reduced, but manufacturing precision requirements increase significantly
Solution Approach 1:
By segmenting the system into multiple groups of micro-optics with different aperture device configurations, the patent reduces the overall device depth while distributing the manufacturing precision requirements across multiple simpler components rather than requiring one highly complex miniaturized prism lens.
Solution Approach 2:
The patent uses multiple copies of standardized micro-optics groups (first group and second group) with well-defined aperture device patterns. These can be manufactured using precise photolithography techniques, allowing for consistent replication and assembly with controlled precision requirements, rather than manufacturing a single complex prism lens.
3Reliability
If aperture devices with translucent windows are added to control light distribution, then scattered light requirements are met, but device complexity increases
Solution Approach 1:
The patent applies translucent windows only in specific regions of the aperture devices for the second group of micro-optics, specifically where scattered light control is needed. This localized approach meets stray light requirements without adding translucent windows to all aperture devices, thereby limiting the increase in device complexity.
Solution Approach 2:
The patent divides the aperture devices into two variants: simpler aperture devices for the first group of micro-optics and aperture devices with translucent windows for the second group. This segmentation allows the system to meet scattered light requirements while keeping the overall device complexity manageable by not uniformly complicating all aperture devices.
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 solution enables efficient and precise light distribution, meeting legal requirements for scattered light while minimizing the overall depth and complexity of the projection device, allowing for scalable and flexible design options for various light distributions.
Implementation Method 1
Each micro-entry optic focuses the light passing through it into at least one micro-entry optic focal point, wherein the micro-entry optic focal point lies between the micro-entry optic and the associated micro-exit optic
Implementation Method 2
the light pre-shaped by the micro-entry optics is projected by the micro-exit optics into an area in front of the vehicle as at least one light distribution
Implementation Method 3
at least one aperture device is arranged between the micro-entry optic and the micro-exit optic, wherein at least the micro-entry optics, the associated micro-exit optics and the at least one aperture device in between form a low-beam micro-optics, wherein the at least one aperture device is arranged to limit the light distribution imaged by the respective micro exit optics
Implementation Method 4
the aperture device within a light-shading area of the aperture device extending to the edge of the aperture, at least one at least partially translucent window is formed to create a light distribution above the light-dark boundary
Data Source
Figure 1
Figure 2(a)~2(d)
Figure 3a~3c
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, namely a low-beam light distribution pattern, a total number of the low-beam microlenses comprising at least two groups of low-beam microlenses.