Adaptive Road Surface Projection Color for Brightness Conditions
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Solution Overview
Problem
Conventional road surface drawing devices using white light struggle to effectively convey color-based information due to difficulty in recognizing the color of projected patterns under varying brightness conditions, leading to reduced visibility and information loss.
Innovation Solution
A road surface drawing device equipped with a brightness detector and controller that adjusts the drawing color based on surrounding conditions, switching between colored and achromatic modes to ensure pattern visibility and information conveyance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a colored pattern is projected onto the road surface to convey information, then information conveyance capability is improved, but the color recognition becomes difficult under bright surrounding conditions
Solution Approach 1:
The system dynamically adjusts the drawing color based on detected surrounding brightness conditions. The controller switches between colored mode (when brightness is low) and achromatic mode (when brightness is high), making the system adaptable to varying environmental conditions rather than fixed
Solution Approach 2:
The system changes the parameter of drawing color from chromatic to achromatic based on brightness detection. When the brightness detector detects high surrounding brightness, the controller changes the color parameter to white or black, ensuring the pattern remains visible and conveyable under bright conditions
2Illumination intensity
If white light is used for road surface drawing to ensure visibility, then pattern visibility is improved, but color-based information conveyance is lost
Solution Approach 1:
The system dynamically selects between colored and achromatic drawing modes based on detected brightness conditions. In dark conditions, colored patterns are used to convey color-based information, while in bright conditions, the system switches to achromatic mode to ensure visibility
Solution Approach 2:
The controller changes the drawing parameter from achromatic (white) to chromatic based on brightness detection. When surrounding brightness is low, the system changes to colored drawing to enable color-based information conveyance while maintaining visibility
3Device complexity
If the drawing color is fixed regardless of surrounding conditions, then device complexity is reduced, but adaptability to different brightness conditions deteriorates
Solution Approach 1:
The system uses a brightness detector to continuously monitor surrounding brightness conditions and feeds this information back to the controller. The controller then adjusts the drawing color accordingly, creating a closed-loop feedback system that adapts to environmental conditions
Solution Approach 2:
The system performs self-adjustment by automatically detecting brightness conditions and selecting appropriate drawing colors without requiring manual intervention. The brightness detector and controller work together to autonomously optimize pattern visibility and information conveyance
Data Source
AI summary
A road surface drawing device includes: a road surface drawing lamp that draws a pattern on a road surface and that is capable of changing a drawing color of the pattern; a brightness detector that measures a brightness of the road surface or a surrounding environment thereof; and a controller that determines the drawing color of the pattern based on an output of the brightness detector and that controls the road surface drawing lamp such that the pattern is drawn in the determined drawing color.