Vehicle Headlamp Optic Body for Precise Low-Beam Distribution
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Solution Overview
Problem
Existing vehicle headlamp illumination devices struggle to meet legal requirements for low beam illumination intensity and spatial distribution, especially when high resolution beams are required.
Innovation Solution
The illumination device employs a complex optic body with multiple deflection surfaces and a projection lens system to generate a low beam extending from 0° to −10°, utilizing a collimating optics and Compound Parabolic Concentrators to guide light rays through different paths, with deflection and projection to achieve the desired beam pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a complex optic body with multiple deflection surfaces is used to achieve precise light-ray guidance, then illumination precision is improved, but device complexity increases
Solution Approach 1:
The optic body is segmented into multiple functional surfaces (first and second light deflection surfaces, first and second light exit surfaces) that independently guide light rays through different paths. This segmentation allows precise control of illumination patterns while maintaining a integrated optic body structure, resolving the contradiction between precision and complexity.
Solution Approach 2:
The single optic body performs multiple functions by guiding light rays through different paths to create distinct illumination zones (first and second parts of low beam). This multi-functionality achieves precise illumination control without requiring multiple separate optical components, thereby reducing overall device complexity while maintaining high precision.
2Illumination intensity
If multiple light exit surfaces are used to create different beam parts, then spatial illumination distribution is improved, but device complexity increases
Solution Approach 1:
Different light exit surfaces (first and second light exit surfaces) are positioned and oriented to provide locally optimized illumination quality for different spatial zones. The first light exit surface generates the first part of the low beam while the second light exit surface generates the second part, allowing tailored illumination distribution without requiring entirely separate optical systems.
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
The solution ensures compliance with legal low beam requirements by providing enhanced illumination intensity and spatial distribution, effectively generating a low beam that meets regulatory standards.
Implementation Method 1
a common light input section for coupling light-rays from the at least one light source into the optic body
Implementation Method 2
light-rays are deflected on the first, second and the third deflection surface by a total internal reflection
Implementation Method 3
the shell surface is configured to deflect light rays coupled into the optic body
Implementation Method 4
the projection lens system, comprising at least one lens, arranged downstream of the optic body along the main direction in order to receive light-rays emitted from light output section
Data Source
AI summary
Illumination device (10) for a motor vehicle headlamp for generating a low beam, wherein a vertical extension of the low beam extends along a VV-line from at least 0° down to at least −10° on the VV-line, said illumination device (10) comprises: —an optic body (100) comprising a common light input section (110), a light output section (130) and a shell surface (140) limiting the optic body (100), —a projection lens system (200) configured to project the light-rays in front of the illumination device (10), wherein the projection lens system (200) in combination with the optic body (100) are configured to generate the low beam illuminated by the projection lens system (200), wherein the optic body (100) comprises a first set of optically operative surfaces for guiding light-rays along a first light-ray path (LR1), wherein the first set of operative surfaces comprises a first and second light deflection surface (300a, 300b), and a first light exit surface (300c), wherein the first and second light deflection surfaces (300a, 300b) are arranged on the shell surface (140), and wherein the first light exit surface (300c) is arranged on the light output section (130), wherein light rays following the first light-ray path (LR1) are incident on the first deflection surface (300a) and are deflected to the second deflection surface (300b), and wherein light-rays incident on the second deflection surface (300b) are deflected to the first light exit surface (300c), and wherein light-rays emitted by the first light exit surface (300c) contribute to generate a first part of the low beam, and wherein the optic body (100) comprises a second set of optically operative surfaces for guiding light-rays along a second and a third light-ray path (LR2, LR3), wherein the second set of optically operative surfaces comprises a third deflection surface (400a) and a second light exit surface (400b), wherein the third deflection surface (400a) is arranged on the shell surface (140) and the second light exit surface (400b) is arranged on the light output section (130) separate from the first light exit surface (300c), wherein light-rays following the second light-ray path (LR2) are incident on the third deflection surface (400a) and are deflected to the second light exit surface (400b) for coupling out of the optic body (100), and wherein light rays following the third light-ray path (LR3) are incident on the second light exit surface (400b) directly from the common light input section (110), wherein light-rays emitted by the second light exit surface (400b) contribute to generate a second part of the low beam.