ADB Headlamp Beam Pattern Control for Glare Prevention
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Solution Overview
Problem
Existing headlamp systems, particularly Adaptive Driving Beam (ADB) systems, face challenges in preventing glare to drivers in opposite vehicles while also effectively illuminating pedestrians or wild animals without causing discomfort or threatening behavior, often requiring additional optical modules and potentially increasing glare.
Innovation Solution
An apparatus and method that utilize an object detection unit, ADB headlamp, and control unit to calculate and adjust the beam pattern by turning off lights for a dark zone corresponding to an opposite vehicle and flashing lights for a boundary section around pedestrians or wild animals, thereby preventing glare and enhancing their awareness of the approaching vehicle using a single optical system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the headlamp system raises the brightness of light to enhance obstacle recognition, then the driver's recognition of pedestrians is improved, but severe glare is caused to drivers in opposite vehicles and unexpected threatening behavior is triggered in wild animals
Solution Approach 1:
The headlamp beam is divided into multiple independently controllable light emitting sections. The control unit selectively activates specific sections based on detected object positions, allowing bright illumination of obstacles while keeping other sections dim or off to avoid glare to opposite vehicle drivers and wild animals.
Solution Approach 2:
Different sections of the headlamp beam are assigned different brightness levels and functions. Sections facing opposite vehicles are kept dim to prevent glare, while sections facing detected obstacles are brightened for recognition. This local differentiation resolves the contradiction between illumination intensity and glare prevention.
2Object-affected harmful factors
If the headlamp system turns off lights for the dark zone corresponding to opposite vehicles, then glare to opposite vehicle drivers is prevented, but the ability to illuminate and recognize pedestrians or wild animals in that area is reduced
Solution Approach 1:
The headlamp beam is segmented into multiple independently controllable sections. When an opposite vehicle is detected, only the sections corresponding to the dark zone are dimmed or turned off, while other sections remain active to maintain overall illumination coverage for detecting pedestrians and wild animals.
Solution Approach 2:
The brightness and activation state of different light emitting sections are dynamically adjusted based on real-time detection of opposite vehicles, pedestrians, and wild animals. This dynamic control allows the system to prevent glare to opposite vehicles while maintaining illumination for obstacle recognition.
3Adaptability or versatility
If additional optical modules are added to provide spot light function, then the headlamp system can illuminate obstacles effectively, but the device complexity and number of parts increase
Solution Approach 1:
The existing headlamp optical system is made multi-functional by enabling selective activation and independent control of different light emitting sections. This allows the single optical system to perform both general illumination and spot light functions, eliminating the need for additional dedicated optical modules.
Solution Approach 2:
The spot light function is merged with the general illumination function within a single optical system. By controlling different sections of the same headlamp assembly, the system combines multiple functions without requiring separate optical modules, thus reducing device complexity.
Data Source
AI summary
An apparatus for controlling a beam pattern of a head lamp for a vehicle, comprising: an object detection unit configured to detect an object ahead of a vehicle; an ADB (Adaptive Driving Beam) head lamp configured to emit a matrix beam according to a beam pattern; a vehicle state input unit configured to receive an ADB operation state; and a control unit configured to calculate the width of a dark zone corresponding to the object and a boundary section around the dark zone according to the object detection result from the object detection unit, and then drive the ADB head lamp according to the ADB operation state.