Segmented Headlamp Reflector Design for Sharp Light Boundaries
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Solution Overview
Problem
Existing lighting devices for motor vehicles struggle to achieve a structurally simple and efficient way to generate a segmented light distribution with sharp, vertical light-dark boundaries, which is essential for optimizing light hiding and illumination scenarios while maintaining homogeneity and reducing production costs.
Innovation Solution
The lighting device features reflectors designed with vertical light-dark boundaries, where the inner edges are sharpened and outer edges are blurred, allowing for independent control of lighting units and reflectors to create overlapping partial light distributions, enabling flexible light distribution design and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If reflectors are designed with sharp vertical light-dark boundaries to optimize light hiding, then light distribution precision is improved, but manufacturing complexity increases
Solution Approach 1:
The reflector surface is divided into multiple segments with different optical properties. Inner edge segments are designed to create sharp light-dark boundaries for precise light hiding, while outer edge segments have blurred boundaries for homogeneous light distribution. This segmentation allows each zone to optimize its function independently.
Solution Approach 2:
Different regions of the reflector are assigned different optical characteristics. The inner edges are sharpened to produce vertical light-dark boundaries, while the outer edges are blurred to create homogeneous illumination. This local differentiation resolves the contradiction by applying sharp boundaries only where needed for light hiding, not throughout the entire reflector.
2Illumination intensity
If multiple differently shaped reflectors are used to optimize light distribution, then light distribution quality is improved, but production costs increase
Solution Approach 1:
Instead of using multiple complete differently shaped reflectors, the invention segments a single reflector into zones with different optical properties. This achieves varied light distribution characteristics while using only one reflector type, significantly reducing production costs and inventory complexity.
Solution Approach 2:
A single universal reflector design incorporates multiple functional zones (sharp inner edges, blurred outer edges) that can handle different lighting requirements. This multi-functional approach eliminates the need for multiple specialized reflector types, reducing manufacturing complexity while maintaining light distribution quality.
3Stability of the object's composition
If partial light distributions are made to overlap to create homogeneous light distribution, then light homogeneity is improved, but light hiding capability deteriorates
Solution Approach 1:
The reflector design applies different edge characteristics to different spatial zones. Inner reflector edges that control light hiding have sharp boundaries, while outer edges that contribute to homogeneous distribution have blurred boundaries. This local quality differentiation allows overlapping light distributions to maintain both homogeneity and sharp boundaries where needed.
Solution Approach 2:
The solution moves from a binary choice (sharp vs. blurred) to a spatial dimension where sharp and blurred edges coexist in different locations. By distributing sharp and blurred edges across different spatial zones of the reflector, the system achieves both light hiding precision and overall homogeneity simultaneously.
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 results in a homogeneous light distribution with the ability to hide or highlight segments effectively, optimizing light intensity and resolution, while minimizing production complexity and costs by using identical or few differently shaped reflectors.
Implementation Method 1
Each lighting unit (2) comprises a light source (4) and a reflector (3) assigned to the light source (4), by means of which light from the light source (4) is emitted via the reflector (3)
Data Source
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AI summary
The invention relates to a lighting device (1) for a motor vehicle, comprising two or more lighting units (2). Each lighting unit (2) comprises: • at least one reflector (3) and • at least one light source (4) paired with the at least one reflector (3). Light from the at least one light source (4) is emitted into a region in front of the vehicle via the corresponding at least one reflector (3) in the installed state of the lighting device (1), and the sub-light distributions of the two or more lighting units (2) form a light distribution of the lighting device (1). The sub-light distributions of the individual lighting units (2) are arranged adjacently to one another in the horizontal direction, and the reflectors (3) of the lighting units (2) are designed such that the sub-light distribution of each lighting unit (2) has at least one sharp vertical light-dark boundary.