ADB Headlamp Beam Control for Glare Suppression
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Solution Overview
Problem
Existing adaptive driving beam (ADB) head lamp systems operate based solely on the presence of oncoming vehicles, leading to erroneous operations and glare issues due to detection of median strips and other road obstacles, causing driver fatigue and safety concerns during nighttime driving.
Innovation Solution
An ADB head lamp system equipped with a road circumstance detecting unit, such as a camera or GPS navigation device, that adjusts the beam emission below a horizontal line based on road information, including median strips and street trees, to minimize glare and reduce frequent beam pattern changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the ADB head lamp operates based solely on the presence of oncoming vehicles detected by the camera, then the beam can be adjusted to avoid glare to oncoming drivers, but erroneous operations occur when median strips or road obstacles are detected, causing driver fatigue and glare to vehicles ahead
Solution Approach 1:
The patent applies local quality by differentiating the treatment of different detected objects. The control unit is configured to respond differently based on object type: it adjusts beams to avoid glare for oncoming vehicles, while ignoring or differently handling median strips and road obstacles. This selective response strategy resolves the contradiction by applying appropriate beam control only where needed, preventing erroneous operations caused by uniform response to all detected objects.
2Object-affected harmful factors
If the ADB head lamp frequently changes beam patterns to adapt to detected vehicles, then the glare to oncoming vehicles is suppressed, but driver fatigue increases due to frequent beam pattern changes
Solution Approach 1:
The patent applies dynamics by implementing adaptive beam control that responds to detected objects while considering temporal patterns. The control unit dynamically adjusts beam patterns based on object detection, but the system is designed to maintain stable beam patterns during sustained periods without new detections, reducing unnecessary changes. This dynamic adaptation with temporal stability resolves the contradiction between suppressing glare and minimizing driver fatigue from frequent adjustments.
3Object-affected harmful factors
If the beam emission angle is adjusted to avoid glare to oncoming drivers, then the oncoming driver's comfort is improved, but the illumination of the road ahead is reduced
Solution Approach 1:
The patent applies segmentation by dividing the head lamp beam control into multiple independent controllable zones or segments. Different beam patterns can be applied to different spatial regions: one pattern for directions where oncoming vehicles are detected (reducing glare), and another pattern for directions where road illumination is prioritized. This segmentation allows simultaneous optimization of both glare reduction and road illumination by directing appropriate beam characteristics to different areas.
Data Source
AI summary
The present invention relates to an ADB head lamp system and a beam control method using the ADB head lamp system, the ADB head lamp system includes an ADB head lamp which is installed in a vehicle; a driving unit which drives the ADB head lamp; a road circumstance detecting unit; and a control unit which controls the driving unit to allow the ADB head lamp to radiate beam below a horizontal line in accordance with a signal which is generated by road circumstance information obtained by the road circumstance detecting unit, thereby implementing a beam which suppresses glare to the opposite vehicle, glare to a vehicle ahead, and minimize fatigue to a driver of the driving vehicle by recognizing a road circumstance.