Adaptive Vehicular Lamp Control for Smooth Shading Transitions
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Solution Overview
Problem
Adaptive Driving Beam (ADB) technologies face challenges in reducing glare to pedestrians and oncoming vehicles, particularly when transitioning from a light distribution pattern with multiple shaded portions to one with fewer or no shaded portions, leading to discomfort for drivers due to sudden changes in light distribution.
Innovation Solution
An automotive lamp system combining a scanning lamp and a non-scanning lamp, where the controller gradually changes the light distribution pattern by adjusting the position and intensity of shaded portions, using multiple control methods to ensure a smooth transition and reduce discomfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the light distribution pattern is switched from multiple shaded portions to fewer shaded portions to adapt to changing surrounding conditions, then the adaptability of the lighting system is improved, but driver discomfort increases due to sudden changes in light distribution
Solution Approach 1:
The patent implements dynamic control of the light distribution pattern by gradually transitioning between different shading configurations. The control unit adjusts the shaded portions progressively rather than switching abruptly, allowing the lighting system to adapt to changing surrounding conditions while maintaining visual comfort for the driver. This dynamic approach resolves the contradiction by making the transition smooth and imperceptible to the driver.
Solution Approach 2:
The control unit performs preliminary assessment of the surrounding conditions using sensor data and determines the optimal light distribution pattern in advance. Before executing the transition, the system prepares the gradual change sequence, ensuring that the transition from multiple shaded portions to fewer shaded portions occurs smoothly. This preliminary planning prevents sudden changes that would cause driver discomfort while maintaining adaptability.
2Device complexity
If the number of shaded portions is reduced to simplify the light distribution pattern, then the device complexity is reduced, but the precision of glare control deteriorates
Solution Approach 1:
The patent changes the parameters of the light distribution pattern dynamically based on surrounding conditions. Instead of using a fixed number of shaded portions, the control unit adjusts the position, width, and intensity of shaded portions as needed. This parameter-based control allows the system to maintain precise glare control for multiple objects while managing device complexity through software control rather than additional hardware components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively reduces driver discomfort by gradually changing light distribution patterns, preventing sudden transitions from multiple to single or no shaded portions, thereby enhancing visual comfort and safety.
Implementation Method 1
a scanning lamp structured to scan light in the horizontal direction in a first range of θ1 to θ2
Implementation Method 2
a non-scanning lamp structured to illuminate a non-scanning region in a second range of θ3 to θ4
Data Source
AI summary
An automotive lamp includes a variable light distribution lamp and a controller. When a first light distribution pattern is to be changed to a second light distribution pattern, and when a difference in the number of shaded portions between the first light distribution pattern and the second light distribution pattern is one, the controller switches a control method for gradually changing the light distribution pattern according to a position relation between the shaded portions included in the first light distribution pattern and the shaded portions included in the second light distribution pattern.