Road Surface Drawing Lamp Unit for Pedestrian Warning
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Solution Overview
Problem
Existing road surface drawing systems fail to effectively alert pedestrians in blind spots to an approaching vehicle, as the warning marks are distorted and difficult to recognize, leading to potential unsafe entries into the vehicle's path.
Innovation Solution
A road surface drawing lamp unit with a light source module and optical system that creates rod-shaped patterns extending in the width direction of the road, allowing the patterns to be clearly visible and moving-like, even at distances far from the vehicle, preventing light diffusion and maintaining clear outlines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the mark is drawn farther from the vehicle to provide early warning, then the warning is given earlier, but the light diffuses excessively and the mark disappears
Solution Approach 1:
The patent employs multiple light sources that can be dynamically controlled in intensity and timing. As the vehicle approaches the pedestrian, the system activates warning marks at progressively greater distances, with dynamic light intensity adjustment to compensate for diffusion over distance, maintaining mark visibility throughout the approach sequence.
Solution Approach 2:
The system activates warning marks in advance at positions far from the vehicle before the vehicle actually reaches the pedestrian. By preliminary activation of marks at distant locations and progressive illumination, the system provides early warning while managing light diffusion through staged illumination sequences.
2Illumination intensity
If the mark is drawn closer to the vehicle to maintain light intensity, then the mark remains visible, but the warning time for the pedestrian is reduced
Solution Approach 1:
The warning system is segmented into multiple discrete light sources positioned at different distances from the vehicle. Instead of a single mark, the system divides the warning function across multiple marks that illuminate sequentially or simultaneously at different positions, allowing early warning at distance while maintaining visibility through distributed light sources.
3Loss of information
If the drawing pattern is made long in the width direction to be recognizable, then the pedestrian can identify it as a warning mark, but the light diffuses more in the front-to-rear direction causing the mark to disappear at distance
Solution Approach 1:
The patent employs asymmetric rod-shaped marks that are elongated in the width direction (lateral dimension) rather than the longitudinal direction. This asymmetric geometry provides strong lateral visibility for recognition while minimizing front-to-rear light diffusion, as the extended width creates a broader visible profile perpendicular to the diffusion direction.
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 solution enables pedestrians to quickly and accurately recognize the approaching vehicle by maintaining clear, moving-like rod-shaped patterns on the road surface, enhancing safety by preventing unintended entries into the vehicle's path.
Implementation Method 1
an optical system which emits light emitted from the light sources to the front
Data Source
AI summary
A road surface drawing lamp unit includes a light source module and an optical system. In the light source module, a plurality of light sources which correspond individually to drawing patterns, each of which is long in a first direction which is a width direction of a road and short in a second direction which intersects the width direction of the road and an emitting axis of the light sources, are arranged so that the drawing patterns are drawn at a plurality of locations on the road along the second direction, and the light sources are formed so as to be turned on and off independently. The optical system emits light emitted from the light sources to the front.