Vehicle Lamp Infrared Snow Detection Glare Reduction
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Solution Overview
Problem
Vehicle lamps struggle to improve visibility during snowfall due to glare and reduced visibility caused by snow particle reflections, and existing adaptive driving beam techniques can deteriorate the visual field with flickering shadows.
Innovation Solution
A vehicle lamp system incorporating an infrared camera and light distribution controller that uses infrared illumination to detect snow particles and dynamically adjust light distribution patterns to shade or weaken shading in ineffective regions, preventing glare and maintaining visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the head lamp is lighted during snowfall to illuminate the front, then visibility is improved, but glare is given to the driver due to reflection by snow particles
Solution Approach 1:
The light distribution is segmented into multiple regions with different intensity levels. The control unit divides the illumination area into a first region (with snow particles) and a second region (without snow particles), applying different light intensities to each region. This segmentation allows the lamp to provide sufficient illumination while reducing glare in areas where snow particles are present.
Solution Approach 2:
The light distribution pattern is adjusted to have non-uniform local quality. The control unit generates a light distribution pattern where the light intensity in the first region (containing snow particles) is lower than in the second region. This local quality adjustment ensures that illumination is optimized for each specific area, reducing glare where needed while maintaining visibility where appropriate.
2Object-affected harmful factors
If adaptive driving beam technique is used to detect and dim lighting in regions corresponding to front vehicles, then glare to other drivers is reduced, but the visual field may deteriorate with flickering shadows
Solution Approach 1:
The system uses feedback from the imaging unit to detect snow particles and dynamically adjust the light distribution pattern. The control unit continuously monitors the environment and modifies the illumination in real-time based on the detected snow particle locations, creating a closed-loop control system that adapts to changing conditions without causing flickering shadows.
Solution Approach 2:
The light distribution pattern is made dynamic rather than static. The control unit generates light distribution patterns that change over time based on the detected snow particle positions and vehicle motion. This dynamic adjustment allows the system to maintain clear visual fields while reducing glare, avoiding the flickering shadow problem associated with static dimming approaches.
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
Enhances visibility during snowfall by reducing glare and flickering shadows, allowing drivers to maintain clear sightlines while detecting moving snow particles without impairing the visual field.
Implementation Method 1
an infrared illumination device configured to irradiate a front
Implementation Method 2
an infrared camera configured to image the front
Data Source
AI summary
A vehicle lamp includes: a variable light distribution lamp capable of generating a beam having a variable intensity distribution; an infrared illumination device configured to irradiate a front; an infrared camera configured to image the front; and a light distribution controller configured to detect a snow particle based on an output of the infrared camera, generate a light distribution pattern in which a portion corresponding to the snow particle is shaded, and control the variable light distribution lamp.