Adaptive Vehicle Headlamp With Transition Light Sources
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Solution Overview
Problem
Conventional motor vehicle headlamps with main beam functions provide uniform lighting that fades laterally, causing discomfort and uneven lighting due to disjoint pixels, which can dazzle drivers and lead to reduced driving comfort when encountering opposing vehicles, especially when they straddle or touch neighboring pixels.
Innovation Solution
An adaptive lighting device with selectively activatable main light sources and optical projection means forming disjoint pixels, supplemented by transition and complementary light sources to create blurred transition and end images that illuminate dark intervals and extend beyond pixel edges, providing a homogeneous illumination pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If disjoint pixels are used to create adaptive light beam, then the ability to selectively illuminate specific road areas is improved, but the lighting uniformity deteriorates causing uneven lighting divided by dark grid
Solution Approach 1:
The patent introduces transition light sources as intermediary elements between the main light sources (pixels). These transition sources emit light that fills the dark intervals between pixels, acting as a mediator that connects the discrete pixel illuminations and creates a continuous, uniform light distribution across the road surface.
Solution Approach 2:
The patent achieves lighting homogeneity by combining the discrete pixel illumination with additional transition light sources. The transition sources are specifically designed to illuminate the dark intervals between pixels, ensuring that the overall lighting pattern appears uniform and homogeneous to the driver, eliminating the perceived dark grid effect.
2Object-affected harmful factors
If neighboring pixels are extinguished to avoid dazzling when opposing vehicle straddles pixels, then the safety against dazzling is improved, but the road illumination coverage deteriorates leaving large areas in darkness
Solution Approach 1:
The patent segments the lighting function into two independent parts: main light sources (pixels) for selective illumination and transition light sources for filling dark intervals. This segmentation allows the pixels to be selectively deactivated for dazzling prevention while the transition sources continue to illuminate the intervals, maintaining road coverage without causing glare.
Solution Approach 2:
The transition light sources serve as intermediaries that maintain illumination in the intervals between pixels even when pixels are deactivated. When pixels are turned off to prevent dazzling, the transition sources ensure that the road areas between the pixel positions remain illuminated, preventing large dark areas while maintaining safety.
3Illumination intensity
If transition light sources are added to illuminate dark intervals, then the lighting homogeneity is improved, but the device complexity increases
Solution Approach 1:
The patent merges the transition light sources with the existing pixel structure, arranging them in an alternating pattern along the transverse alignment. This combining approach allows both pixel and transition sources to be integrated into a single lighting device module, sharing common optical components and control systems, thereby reducing overall complexity despite the increased number of light-emitting elements.
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 reduced dazzling of opposing vehicle drivers by creating a dark hole only where necessary, maintaining road illumination homogeneity and enhancing driving comfort by minimizing the dark areas created when opposing vehicles are detected.
Implementation Method 1
optical projection means which are arranged so as to project an image at infinity of each main light source
Implementation Method 2
project an image at infinity
Implementation Method 3
at least one transition light source whose transition image is superimposed on all the pixels of the alignment by fully illuminating all the dark intervals
Implementation Method 4
blurred transition and end images
Implementation Method 5
two complementary light sources which are associated with projection means so as to form end images
Implementation Method 6
illuminate in the extension of a transverse end of the alignment of pixels
Data Source
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AI summary
The invention relates to a lighting device (26, 40) for a motor vehicle which comprises: - a plurality of selectively activatable main light sources (12) which are arranged in a transverse alignment; - optical projection means (14) which are arranged so as to project an image to infinity from each main light source (12), the images forming pixels (18) each having at least one sharp edge, the pixels (18) being disjoint and transversely aligned, two adjacent pixels (18) being separated transversely by a dark interval (20).According to the invention, the device comprises at least one transition light source (28) of which a transition image (30) is projected to infinity by associated optical projection means (14, 42), each transition image (30) fully illuminating at least one dark interval (20) by overlapping the pixels (18) adjacent to said dark interval (20), each transition light source (28) being capable of being selectively activated.