Adaptive Vehicle Lamp Control for Glare-Free Light Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current vehicle lamp systems face challenges in achieving accurate radiation and formation of light distribution patterns according to the situation ahead of a host vehicle, particularly in terms of illuminance adjustment and target object detection.
Innovation Solution
A vehicle lamp system that includes an imaging unit, a luminance analysis unit, a target analysis unit, a tracking unit, an illuminance setting unit, and a light source control unit, which work together to detect luminance and target objects, set specific illuminance values for individual areas based on object positions, and adjust light illuminance accordingly, using high-speed and low-speed cameras for accurate image analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single imaging unit is used for both luminance detection and target object detection, then device complexity is reduced, but measurement precision and detection accuracy deteriorate
Solution Approach 1:
The imaging function is segmented into two separate units: a high-speed imaging unit dedicated to luminance detection and a low-speed imaging unit dedicated to target object detection. This segmentation allows each unit to be optimized for its specific function, with the high-speed unit capturing rapid luminance changes and the low-speed unit focusing on detecting and tracking target objects, thereby resolving the contradiction between device simplicity and detection precision.
2Measurement precision
If high-speed imaging is used for luminance detection, then measurement precision is improved, but use of energy increases
Solution Approach 1:
Different imaging units with different operational characteristics are assigned to different detection tasks based on local requirements. The high-speed imaging unit operates at high frame rates only for luminance detection where temporal resolution is critical, while the low-speed imaging unit handles target object detection where lower frame rates are sufficient. This localized optimization of imaging speed reduces overall energy consumption while maintaining measurement precision where needed.
3Illumination intensity
If illuminance is increased for all areas, then visibility is improved, but harmful factors increase due to glare for oncoming vehicles
Solution Approach 1:
The illuminance setting unit implements local quality control by determining different illuminance values for different individual areas in the light distribution pattern. Areas where oncoming vehicles are detected receive reduced or zero illuminance to prevent glare, while areas without oncoming vehicles maintain higher illuminance to ensure driver visibility. This spatially differentiated illuminance control resolves the contradiction between visibility and glare prevention.
Solution Approach 2:
The system uses feedback from the low-speed imaging unit that detects target objects and oncoming vehicles to dynamically adjust the illuminance distribution. When oncoming vehicles are detected in specific areas, the feedback signal triggers the illuminance setting unit to reduce illuminance in those corresponding areas, while maintaining normal illuminance in other areas. This closed-loop feedback mechanism enables real-time adjustment to prevent glare while preserving visibility.
Data Source
AI summary
A vehicle lamp control device includes: an imaging unit that takes an image ahead of a host vehicle; a target analysis unit that detects target objects ahead of the host vehicle based on the information obtained from an imaging unit configured to take an image ahead of the host vehicle; and a tracking unit that determines a specific target object from the target objects detected by the target analysis unit and to detect displacement of the specific target object based on a detection result of an luminance analysis unit configured to detect luminance of each of a plurality of individual areas ahead of the host vehicle based on information obtained from the imaging unit. A light distribution pattern to be formed by a light source unit of a vehicle lamp is determined based on the detection result of the luminance analysis unit and a detection result of the tracking unit.