Adaptive Headlamp Beam Control via Steering Angle and Camera Fusion
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Solution Overview
Problem
Current vehicular headlamp systems, such as those with intelligent front-lighting systems, fail to accurately adjust high beams during changes in driving conditions like lane changes or turns, often turning off high beams intended for oncoming or preceding vehicles, leading to glare for other drivers.
Innovation Solution
An apparatus comprising an image capture unit, a steering angle detection unit, and a controller that acquires and analyzes the surrounding image to detect the presence and position of forward vehicles within a set region, adjusting high beams based on the steering angle of the subject vehicle to prevent glare and ensure accurate beam control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the camera faces forward to recognize preceding and oncoming vehicles, then the positions of vehicles are accurately recognized, but when driving conditions change (lane change or turn), high beams are turned off with respect to unintended objects and turned on with respect to positions of oncoming and preceding vehicles
Solution Approach 1:
The patent applies dynamics by making the headlamp beam control adaptive to changing driving conditions. The control unit dynamically adjusts high beam operation based on real-time steering angle detection, allowing the system to respond to lane changes and turns. This resolves the contradiction by enabling the system to maintain reliability during dynamic conditions while preserving accurate vehicle position recognition capability.
Solution Approach 2:
The patent implements feedback by using the steering angle detection unit to provide real-time information about vehicle steering state to the control unit. The control unit uses this feedback to determine whether to activate or deactivate high beams, creating a closed-loop control system that ensures high beam control reliability adapts to actual driving conditions while maintaining accurate vehicle position awareness.
2Object-affected harmful factors
If high beams are turned off to avoid glare for oncoming and preceding vehicles, then glare is reduced, but visibility for the subject vehicle driver may be reduced
Solution Approach 1:
The patent applies local quality by selectively controlling different high beam groups (left, center, right) based on the specific driving condition and detected vehicle positions. Instead of uniformly turning off all high beams, the system deactivates only the specific beam group that would cause glare to oncoming or preceding vehicles while maintaining other beam groups for driver visibility, thus resolving the contradiction between reducing glare and maintaining visibility.
Solution Approach 2:
The patent segments the headlamp high beams into multiple independent controllable groups (left high beam group, center high beam group, right high beam group). This segmentation allows the control unit to selectively activate or deactivate specific beam groups based on steering angle and detected vehicle positions, enabling precise control that reduces glare to other drivers while maintaining necessary visibility for the subject vehicle driver.
3Device complexity
If the headlamp system uses camera-based recognition only, then the system complexity is low, but the headlamp control accuracy during lane changes and turns is insufficient
Solution Approach 1:
The patent merges multiple sensing approaches by combining camera-based vehicle recognition with steering angle detection. The control unit integrates information from both the image capture unit (camera) and the steering angle detection unit to make headlamp control decisions. This combination maintains relatively low system complexity while significantly improving beam control accuracy during lane changes and turns by cross-validating camera data with actual steering input.
Data Source
AI summary
An apparatus for controlling a vehicular headlamp is provided. The apparatus includes an image capture unit that acquires a surrounding image of a subject vehicle, a steering angle detection unit that detects a steering angle of the subject vehicle, and a controller operates a headlamp of the subject vehicle based on the steering angle. The controller detects whether a forward vehicle is present from the acquired surrounding image when the headlamp of the subject vehicle is turned on, and detect whether the forward vehicle is positioned within a set region of the image when the forward vehicle is present. Some of high beams of the headlamp are turned off based on the detected steering angle when the forward vehicle is positioned within the set region of the image.