Headlamp Shadow Zone Control via Steering Sensor Input
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional camera-based adaptive driving beam (ADB) systems struggle to accurately control glare on curved roads due to limitations in determining the position of preceding and opposing vehicles, leading to reduced estimation speed and increased glare to these vehicles.
Innovation Solution
An apparatus and method that utilize steering information detected by a steering sensor to adjust the margin of the shadow zone of a headlamp, increasing or decreasing it based on the amount and direction of steering changes to prevent glare, even on curved roads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a camera-based ADB system is used to control headlamp shadow zones, then glare prevention can be achieved on straight roads, but the system fails to accurately track vehicle positions on curved roads due to low estimation speed
Solution Approach 1:
The patent combines steering information from a steering sensor with camera-based vehicle position detection. The steering information detector detects steering wheel angle changes, and this information is integrated with the camera-based ADB control system to predict vehicle position changes on curved roads, thereby improving both tracking speed and accuracy simultaneously
Solution Approach 2:
The system performs preliminary detection of steering information and predicts vehicle position changes before the camera can fully track the moving vehicle. By detecting steering wheel angle changes in advance and using this information to anticipate vehicle position, the system prepares the shadow zone control proactively rather than reactively, solving the speed limitation
2Measurement precision
If the headlamp aiming position is abruptly changed to follow vehicle movement on curved roads, then tracking accuracy improves, but glare is given to opposing vehicles due to delayed response
Solution Approach 1:
The system establishes a feedback loop where steering information is continuously detected and fed back to the ADB controller. The steering information detector monitors steering wheel angle in real-time, and this feedback enables the controller to continuously adjust the shadow zone margin, ensuring the headlamp tracking remains synchronized with vehicle movement while preventing glare
Solution Approach 2:
The patent makes the shadow zone control dynamic by linking it to real-time steering information. Instead of static or camera-only control, the system dynamically adjusts the shadow zone margin based on the detected steering wheel angle changes, allowing the headlamp aiming to adapt flexibly to curved road conditions and maintain both accuracy and glare prevention
Data Source
AI summary
Provided is an apparatus for controlling light distribution using steering information, the apparatus including a steering information detector configured to detect an amount of change of steering information sensed through a steering sensor that senses the steering information, a determiner configured to determine whether the amount of change of the steering information detected through the steering information detector is greater than or equal to a predetermined critical value and determine a direction in which the steering information is changed, and a controller configured to increase or decrease a margin of a shadow zone of a headlamp according to the amount of change of the steering information when the amount of change of the steering information is determined by the determiner to be greater than or equal to the predetermined critical value.