Adaptive Headlight Signlight Control to Limit Residual Glare
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Solution Overview
Problem
Existing adaptive motor vehicle lighting systems struggle to reliably prevent dazzling of road users by ensuring that the residual light emission in the signlight area does not exceed legal limits, particularly when multiple light modules contribute to the radiation in this area.
Innovation Solution
A control unit compares the detected relative position of road users with a second position range that can be illuminated by the signlight range and adjusts the intensity of the signlight area's illumination, using control means to reduce light emission if a road user is detected within this range, thereby ensuring compliance with legal standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the high beam distribution uses individually controllable segments to mask out road users, then the dazzling risk to road users is reduced, but residual light emission from overlapping segments in the signlight area may still exceed legal limits
Solution Approach 1:
The headlight beam is divided into multiple individually controllable segments, allowing selective masking of road users by deactivating specific segments while maintaining illumination in other areas. This segmentation enables precise control over light distribution to minimize dazzling while maintaining overall visibility.
Solution Approach 2:
Different regions of the light distribution are controlled with different qualities - the signlight area receives reduced intensity when road users are detected, while other areas maintain normal illumination. This local quality adjustment ensures legal compliance in specific zones without compromising overall lighting performance.
2Reliability
If the light intensity in the signlight area is reduced to meet legal standards, then compliance with safety regulations is achieved, but the illumination of traffic signs and symbols may be insufficient
Solution Approach 1:
The light intensity in the signlight area is dynamically adjusted based on the presence and position of road users. When no road users are detected, full intensity is maintained for optimal traffic sign illumination. When road users are detected in the signlight area, intensity is reduced to comply with legal standards, creating a dynamic balance between compliance and illumination effectiveness.
Solution Approach 2:
The system proactively detects road users in the signlight area before dazzling occurs and preemptively reduces light intensity to prevent compliance violations. This preliminary action ensures legal standards are met while maintaining illumination when safe to do so.
Data Source
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AI summary
The invention relates to a motor vehicle lighting system (1) comprising at least two adaptive motor vehicle headlights (2), wherein an adaptive motor vehicle headlight (2) is a headlight that is configured to generate a low beam distribution (AL) and an adaptive high beam distribution (FL) with a resolution of at least two, preferably at least seven, individually controllable segments (FLs1, FLs2, FLs13), wherein the low beam distribution (AL) has an area assigned for traffic sign illumination, hereinafter referred to as signlight area (ALsl), which at least partially overlaps with a beam area assigned to the high beam distribution (FL).