Adaptive Vehicle Lamp Dimming for Speed and Turn Misalignment
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Solution Overview
Problem
Existing adaptive driving beam (ADB) control systems face challenges in accurately positioning the dimmed portion of a light distribution pattern relative to dimming targets, such as front vehicles and light reflective objects, especially at high vehicle speeds or during turns, leading to potential glare issues.
Innovation Solution
A light distribution controlling device that performs a dilation process on luminous points in images using a structuring element of a predetermined shape, and adjusts the size or position of the structuring element based on vehicle speed or rate of turn to improve the alignment of the dimmed portion with the dimming target.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed structuring element is used for dilation process, then the processing is simple, but mispositioning occurs at high vehicle speeds or during turns
Solution Approach 1:
The patent applies the Dynamics principle by making the structuring element dynamic rather than fixed. The size and position of the structuring element are adjusted in real-time based on vehicle speed and steering angle feedback. At higher speeds or during turns, the structuring element is enlarged or repositioned to compensate for the increased relative motion between the host vehicle and dimming targets, thereby maintaining positioning accuracy without overcomplicating the processing.
Solution Approach 2:
The patent implements Parameter changes by modifying the parameters of the structuring element (size and position) according to varying vehicle operating conditions. Specifically, the structuring element's dimensions and spatial location are changed based on detected vehicle speed and steering angle, allowing the dilation process to remain accurate across different driving scenarios while keeping the overall processing framework relatively simple.
2Measurement precision
If the structuring element size is increased to reduce mispositioning, then positioning accuracy improves, but the area of the dimmed portion increases unnecessarily
Solution Approach 1:
The patent applies the Local quality principle by making the structuring element's parameters (size and position) location-dependent and condition-specific. Rather than uniformly increasing the structuring element size across all scenarios, the system selectively adjusts the structuring element only in the regions and conditions where mispositioning is likely to occur (e.g., at high speeds or during turns). This ensures positioning accuracy is improved only where necessary, without unnecessarily expanding the dimmed portion area in other regions.
Solution Approach 2:
The patent uses the Dynamics principle to dynamically adjust the structuring element size based on real-time vehicle conditions. The structuring element is enlarged or repositioned only when vehicle speed or steering angle indicates a risk of mispositioning, and returns to its original size when conditions are stable. This dynamic adjustment maintains positioning accuracy when needed while avoiding unnecessary expansion of the dimmed portion area during normal driving conditions.
Data Source
AI summary
A light distribution controlling device determines a light distribution pattern having a dimmed portion to overlap a dimming target present in a region ahead of a vehicle. The light distribution controlling device performs, by using a structuring element of a predetermined shape, a dilation process on a luminous point included in an image capturing the region ahead to generate a dilated region, and determines the dimmed portion based on the dilated region. The light distribution controlling device varies at least one of a size of the structuring element or a position of a pixel of interest in the structuring element in accordance with at least one of a vehicle speed or a rate of turn of the vehicle.