Vehicle Headlamp Light Distribution Control via Inclination and Reference Position
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Solution Overview
Problem
Existing vehicle headlamp light distribution control systems face challenges in accurately adjusting light distribution due to changes in vehicle inclination, leading to potential glare for other vehicles until a reference position is detected, as the imaging optical axis shifts, affecting the accuracy of image-based information.
Innovation Solution
A vehicle headlamp light distribution control device and method that includes a detector to identify a reference position from the front vehicle image and a controller to adjust light distribution based on sensed vehicle inclination or physical changes, using calibrated information after the reference position is detected, and controlling the upper illumination light source to avoid overlapping other vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If image processing is used to detect the reference position (vanishing point) from the captured image, then the light distribution can be accurately controlled based on calibrated information, but time is required for detection which causes deterioration of light distribution control accuracy during the detection period
Solution Approach 1:
The patent applies preliminary action by detecting the vanishing point position in advance and storing it as reference information. The system performs vanishing point detection before actual light distribution control begins, so that when control is needed, the reference position is already available. This eliminates the delay between image capture and accurate light distribution control, resolving the contradiction between needing time for detection and maintaining control accuracy.
2Adaptability or versatility
If the imaging optical axis changes due to vehicle inclination changes, then the imaging range moves, but the reference position detection becomes inaccurate until calibration is performed
Solution Approach 1:
The patent uses feedback by detecting the vanishing point position from captured images and using this detected position to calibrate and correct the reference position information. The system continuously monitors the vanishing point and adjusts the reference position accordingly, creating a feedback loop that maintains accurate light distribution control even when vehicle inclination changes cause the imaging optical axis to shift. This feedback mechanism resolves the contradiction between adapting to inclination changes and maintaining detection accuracy.
Data Source
AI summary
A vehicle headlamp light distribution control device includes: a detector that is configured to detect a reference position from an image of a frond region of a vehicle; and a controller that is configured to control, during a time period until the reference position is detected by the detector, a light distribution of a headlamp of the vehicle in accordance with a sensed inclination of the vehicle or a physical amount expressing the inclination of the vehicle, and to control, after the reference position is detected by the detector, the light distribution of the headlamp on the basis of calibrated information obtained by calibrating information obtained from the image in accordance with the detected reference position.