Vehicle Lighting Control for Pixelated Glare-Free High Beams
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Solution Overview
Problem
Current motor vehicle lighting systems struggle to generate a pixelated high light beam with a dark region aligned with a target object, which is essential for avoiding discomfort glare while allowing the driver to see traffic signs and objects on the road without distraction.
Innovation Solution
A method that uses a sensor system to detect a target object, determine its relative distance and road slope, and control elementary light sources to create a pixelated beam with upper and lower cut-offs, ensuring the dark region frames the object effectively, using equations to predict the object's position and adjust the light beam angles accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a horizontally segmented beam is used to avoid glare, then discomfort glare to target object is reduced, but the ability to illuminate road signs and near-field objects is compromised
Solution Approach 1:
The lighting system divides the beam into multiple horizontally segmented elementary light beams, allowing selective control of individual segments. This enables the system to darken only the segment containing the target object while maintaining illumination in other segments, thus avoiding glare to the target while preserving visibility of road signs and near-field objects.
Solution Approach 2:
The system applies different illumination qualities to different spatial regions: dark regions are created locally at the position of detected target objects, while other regions maintain normal or enhanced illumination. This local differentiation allows simultaneous glare avoidance and road signage visibility.
2Object-affected harmful factors
If a dark region is created at the target object position, then discomfort glare is avoided, but the driver may lose awareness of the target object's movement
Solution Approach 1:
The sensor system continuously detects target objects and periodically updates the positioning of dark regions in the illuminating beam. This periodic adjustment ensures the dark region tracks the moving target object, maintaining glare avoidance while the driver can observe the dark region's movement to understand target object trajectory.
Solution Approach 2:
The system uses sensor detection feedback to dynamically adjust the position of dark regions in real-time. The sensor continuously monitors target object position, and this information feeds back to the lighting control system, which adjusts the dark region placement accordingly, ensuring continuous tracking and glare avoidance.
3Illumination intensity
If high-resolution pixelated beam is emitted, then visibility is improved, but the complexity of controlling individual pixels increases
Solution Approach 1:
The pixelated beam is segmented into controllable elementary light sources, with each source corresponding to a specific pixel or group of pixels. This segmentation enables independent control of small groups of pixels to create dark regions, reducing the computational complexity compared to controlling each pixel individually while maintaining high visual resolution.
Solution Approach 2:
Adjacent elementary light sources are controlled together to form dark regions, merging multiple control operations into unified actions. This approach reduces the number of independent control decisions needed, simplifying the control system while achieving the desired pixelated beam effect with proper dark region formation.
Data Source
AI summary
Method for controlling a lighting system with the lighting system including a plurality of light sources, wherein each light source is capable of emitting an elementary light beam with the vertical angular aperture of which is less than 1°. The method includes detecting a target object, determining a relative distance between a given point of the host vehicle sensor system and a detected point of the target object and determining a gradient of the road on which the target object is located, determining a lower angle and an upper angle between a given point of the host vehicle lighting system and a high cut-off point and a low cut-off point, controlling the light sources of the host vehicle lighting system in order to emit a pixelated light beam of the driving beam type in order to generate a dark zone extending substantially between the high and low cut-off points.