Vehicle Lighting System Brightness Adaptation for Automated Driving
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Solution Overview
Problem
Existing vehicle lighting systems do not adapt brightness based on driving modes or external object characteristics, leading to inefficient power consumption and potential interference with sensors like LiDAR.
Innovation Solution
A vehicle lighting system that adjusts brightness and shape of the light distribution pattern based on driving modes and object attributes, using a lighting control unit to optimize illuminance for improved visibility and reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the lighting unit emits light with high brightness to improve driver visibility, then visibility is improved, but power consumption increases and sensor detection accuracy deteriorates
Solution Approach 1:
The lighting control unit dynamically adjusts the brightness of the light distribution pattern based on the detected driving mode. In automated driving mode, the brightness is reduced compared to manual driving mode. This dynamic adaptation resolves the contradiction by making the lighting system flexible rather than static, allowing it to optimize power consumption while maintaining adequate visibility for each operating context.
Solution Approach 2:
The system changes the brightness parameter of the light distribution pattern according to the driving mode detected by the vehicle control unit. When transitioning from manual to automated driving mode, the brightness parameter is reduced. This parameter change strategy directly addresses the contradiction by adjusting the illumination intensity to match the actual visibility needs of different driving scenarios.
2Illumination intensity
If the lighting unit emits light with high brightness to improve driver visibility, then visibility is improved, but detection accuracy of sensors like LiDAR deteriorates due to interference
Solution Approach 1:
The lighting system dynamically adapts its brightness output based on real-time detection of driving mode. In automated driving mode where sensor accuracy is critical, the system automatically reduces light intensity to minimize interference with LiDAR and other sensors, while maintaining adequate illumination for driver awareness during manual operation.
Solution Approach 2:
The brightness parameter of the light distribution pattern is changed according to the driving mode. When the vehicle operates in automated driving mode, the brightness parameter is reduced to prevent interference with sensor detection, thereby resolving the contradiction between visibility requirements and sensor measurement precision.
3Illumination intensity
If the lighting system provides uniform high brightness illumination to improve overall visibility, then visibility is improved, but power consumption increases and sensor interference worsens
Solution Approach 1:
Instead of uniform high brightness illumination across the entire field, the system applies different brightness levels to different regions or directions based on local requirements. The lighting control unit can adjust brightness selectively, providing higher illumination where needed for driver visibility while reducing intensity in areas where sensor operation is critical, thus resolving the contradiction between overall visibility and local sensor reliability.
Solution Approach 2:
The lighting system dynamically adjusts its illumination characteristics based on the detected driving mode and surrounding environment. This dynamic behavior allows the system to optimize the balance between providing adequate visibility and maintaining sensor detection accuracy, improving overall system reliability by adapting to changing operational conditions.
Data Source
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AI summary
A vehicle lighting system is provided in a vehicle capable of traveling in an automated driving mode, and includes: a lighting unit configured to form a light distribution pattern by emitting light toward the outside of the vehicle; and a lighting control unit configured to change the brightness of the light distribution pattern according to a driving mode of the vehicle.