Hybrid Matrix Low-Beam Headlight Cut-Off Control
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Solution Overview
Problem
Existing headlight assemblies struggle to meet varying regulatory standards for cut-off patterns while effectively illuminating the roadway ahead while minimizing glare to oncoming and preceding vehicles.
Innovation Solution
A headlight assembly comprising a foreground light source and a spot beam light source with pixel light sources, controlled by a controller to generate a combined low-beam projection pattern, allowing for adjustable cut-off patterns to comply with different regulations and reduce glare.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If shielding is used to block light from illumination sources, then cut-off pattern is generated to minimize glare to other vehicles, but illumination intensity and visibility are reduced
Solution Approach 1:
The headlight assembly is divided into multiple independently controllable light sources including a foreground light source and a spot beam light source with pixel light sources. Each light source can be controlled separately to illuminate different areas, allowing the foreground light source to provide broad illumination while the spot beam light source creates precise cut-off patterns to minimize glare to other vehicles.
Solution Approach 2:
Different regions of the headlight assembly have different light distribution characteristics. The foreground light source provides wide-area illumination for general roadway visibility, while the spot beam light source with pixel light sources provides directional illumination with precise cut-off patterns. This local differentiation allows simultaneous achievement of broad illumination and targeted glare reduction.
2Adaptability or versatility
If multiple light sources with different fields of view are combined, then adaptable illumination patterns are achieved to meet various regulatory standards, but device complexity increases
Solution Approach 1:
The headlight assembly integrates multiple light sources with different fields of view into a single multi-functional system. The foreground light source provides wide-area illumination while the spot beam light source with pixel light sources provides directional illumination. This universal design allows the same assembly to meet various regulatory standards (ECE, SAE, DOT, CCC) by dynamically controlling different light sources rather than requiring separate assemblies for different standards.
Solution Approach 2:
The system employs dynamic control of multiple light sources through a controller that can independently adjust the foreground light source and spot beam light source. This dynamic capability allows real-time adaptation to different regulatory requirements and driving conditions, enabling the headlight assembly to switch between different illumination patterns and cut-off configurations as needed.
Data Source
AI summary
A headlight assembly for a vehicle includes a foreground light source configured to project light over a first field of view greater than 20-degrees wide, and a spot beam light source that includes a plurality of pixel light sources configured to project light over a second field of view smaller than the first field of view and overlapping the first field of view. The foreground light source and the spot beam light source are operable together in a low-beam mode to generate a combined low-beam projection pattern. A lighting system for a vehicle comprises two headlight assemblies. Each of the headlight assemblies includes: a foreground light source, and a spot beam light source having a plurality of pixel light sources. The lighting system also comprises a controller in communication with the spot beam light sources to communicate pattern data thereto for controlling a cut-off pattern of the light projected therefrom.