Vehicle Headlight Module With Rotated Secondary Optics
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Solution Overview
Problem
Existing headlight technologies face challenges in implementing a dynamic cornering light function without mechanical adjustment, requiring an undesirably large number of light sources and resulting in economic and technical disadvantages, as well as uncomfortable cut-off line gradients and reduced low beam range when driving through curves.
Innovation Solution
The light module employs secondary optics with at least two facets, each with specific refractive power planes rotated relative to the optical axis, allowing for a low beam spot with adjustable rise angles and horizontal light-dark boundaries, enabling a dynamic cornering light function with reduced complexity and source effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an undesirably large number of light sources are used to implement dynamic cornering light function without mechanical adjustment, then the cornering light function can be achieved, but economic and technical disadvantages occur
Solution Approach 1:
The patent divides the light module into multiple independently controllable groups of semiconductor light sources arranged in a matrix pattern. Each group can be individually activated or deactivated to create different light distribution patterns, enabling dynamic cornering light functions without requiring an excessive total number of light sources. This segmentation allows flexible combination of light sources to achieve various beam patterns.
Solution Approach 2:
The patent implements dynamic cornering light functionality through electronic control of light source groups rather than mechanical adjustment. By selectively activating different groups of semiconductor light sources in the matrix arrangement, the system dynamically changes light distribution patterns to follow steering angles, achieving adaptability without mechanical components.
2Ease of operation
If conventional headlight designs are used for cornering light function, then the system structure is simpler, but the cut-off line gradients become uncomfortable and low beam range is reduced when driving through curves
Solution Approach 1:
The patent applies different optical characteristics to different regions of the light distribution by controlling specific groups of semiconductor light sources. The optical system creates asymmetric light patterns with optimized cut-off line gradients in different areas, providing comfortable illumination for cornering while maintaining appropriate beam ranges. Each light source group contributes to specific regions of the overall light distribution.
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 configuration allows for a dynamic cornering light function with a 20° to 30° increase in the cut-off line angle, improving driving comfort and reducing the need for mechanical adjustments, while maintaining a wide low beam range without increasing the number of light sources.
Implementation Method 1
The optics element is set up to reshape the light bundle emanating from the semiconductor light source by refraction and total internal reflections such that light exiting the light exit surface of the optics element has a smaller opening angle than the light entering the respective optics element
Implementation Method 2
The optics element is set up to reshape the light bundle emanating from the semiconductor light source by refraction and total internal reflections
Implementation Method 3
The primary optics is set up to generate an intermediate light distribution from the light emanating from the light sources, which intermediate light distribution has a straight edge
Implementation Method 4
The light module has secondary optics which, due to their arrangement and their optical properties, are designed to map the intermediate light distribution into a front area of the light module
Data Source
AI summary
A light module (10) for a motor vehicle headlight is presented, comprising a light source assembly (12), a primary optic (13), and a secondary optic (16). The light source assembly (12) has a row of adjacent semiconductor light sources (14.i), the luminous flux of which can be controlled individually or in groups. The primary optic generates an intermediate light distribution and illuminates a light-entry surface of the secondary optic. The secondary optic has at least two facets (30, 32). Each facet has a cross-sectional plane parallel to the optical axis with maximum refractive power and a cross-sectional plane perpendicular to it and parallel to the optical axis with minimum refractive power. The cross-sectional planes of maximum (minimal) refractive power of the different facets are rotated relative to each other about the optical axis by a first angle.