Road Surface Image Display for Pedestrian Safety Notification
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Solution Overview
Problem
Existing image display devices on road surfaces fail to effectively notify pedestrians of a vehicle's safety level, as they cannot provide real-time, quantitative information about the vehicle's safety relative to the pedestrian's position and direction.
Innovation Solution
An image display device equipped with an illuminator, detector, and controller that displays a chronologically-changeable notification image on the road surface, calculating and evaluating the safety level based on pedestrian position and direction, and adjusting the image's display mode and location to inform pedestrians of their safety relative to the vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing image display devices display static images on the road surface, then the device structure is simple, but the device cannot provide real-time safety level information to pedestrians
Solution Approach 1:
The notification image changes dynamically based on the evaluated safety level. When the safety level is high, a first notification image is displayed; when the safety level is low, a second notification image is displayed. This dynamic adaptation allows the system to provide accurate real-time safety information while using a relatively simple structure that responds to changing conditions.
Solution Approach 2:
The system evaluates the safety level based on the relationship between the vehicle and pedestrian, then uses this evaluation to determine which notification image to display. This feedback mechanism ensures that the displayed information accurately reflects the current safety status without requiring complex additional hardware.
2Loss of information
If the illuminator displays notification images continuously, then pedestrians can always see safety information, but energy consumption increases
Solution Approach 1:
The control unit determines whether to display the notification image based on periodic evaluation of the safety level and pedestrian detection status. The illuminator operates periodically rather than continuously, activating only when safety information needs to be communicated, thereby reducing energy consumption while maintaining information availability when needed.
Solution Approach 2:
The system applies different display strategies based on local conditions - the notification image is displayed only in the region where the pedestrian is located and only when the safety level evaluation indicates it is necessary. This localized approach ensures information availability for relevant pedestrians while minimizing overall energy consumption.
3Loss of information
If the notification image provides detailed safety information, then pedestrians can understand their safety level, but the image becomes less attention-grabbing
Solution Approach 1:
The notification image is segmented into distinct visual elements that convey safety level information through different patterns, colors, or symbols rather than dense text. This segmentation allows pedestrians to quickly grasp the safety status at a glance while still receiving complete information through the visual code.
Solution Approach 2:
The system uses different colors or luminance levels in the notification image to represent different safety levels. This color-coding approach provides complete safety information in an easily distinguishable visual format that captures pedestrian attention immediately, avoiding the need for detailed text that would reduce visibility and impact.
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
Enables pedestrians to recognize their safety level in real-time, reducing the likelihood of accidents by providing accurate, attention-grabbing visual cues about the vehicle's arrival time and safety status, while avoiding unnecessary information when the pedestrian is not crossing the driveway.
Implementation Method 1
an illuminator configured to send out light on a road surface frontward of the vehicle, to display an image on the road surface
Data Source
AI summary
An image display device includes an illuminator and a detector. The illuminator is configured to send out light on a road surface frontward of a vehicle, to display an image on the road surface. The detector is configured to detect a pedestrian frontward of the vehicle. The illuminator is configured to cause a notification image to be on chronologically-changeable display on the road surface. The notification image notifies information to the pedestrian detected by the detector.