Road Surface Marker Projection for EV Presence and State Signaling
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Solution Overview
Problem
Electric vehicles, due to their quiet operation and reduced vibration, are less noticeable to surroundings compared to gasoline vehicles, necessitating an improved notification function for increased visibility.
Innovation Solution
A road surface rendering device that projects an area marker on the road surface around a vehicle, with the area marker being constantly projected during nighttime travel and its projection region adjusting based on the vehicle's traveling state or the need to attract attention from other traffic participants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the area marker is projected only onto one region, then the notification function is simple, but the visibility range is limited
Solution Approach 1:
The projection region of the area marker is made dynamic and adjustable based on the vehicle's traveling state. The control unit changes the projection region from a first region to a second region according to detected traveling states (acceleration, deceleration, turning), enabling the notification function to adapt to different driving conditions and expand visibility range without requiring multiple fixed projection systems.
2Illumination intensity
If the projection region transitions frequently to attract attention, then the notification function is enhanced, but the energy consumption increases
Solution Approach 1:
The projection region transitions periodically or in response to specific traveling state changes rather than continuously. The control unit adjusts the projection region based on detected events such as acceleration, deceleration, or turning, creating a periodic or event-driven notification pattern that attracts attention while minimizing unnecessary energy consumption compared to continuous projection transitions.
3Reliability
If the area marker is constantly projected during nighttime traveling, then the vehicle presence is always visible, but the energy consumption increases
Solution Approach 1:
The road surface rendering device operates autonomously based on detected traveling states without requiring continuous external control input. The control unit automatically adjusts the projection region according to the vehicle's own traveling state (acceleration, deceleration, turning), enabling the system to maintain reliable presence notification while optimizing energy usage through state-responsive operation rather than constant maximum operation.
Data Source
AI summary
A road surface rendering device for projecting an area marker on a road surface around the vehicle. The road surface rendering device is to be mounted on a vehicle. The area marker is configured to be constantly projected at least during nighttime traveling of the vehicle. In a case where a traveling state of the vehicle changes, a projection region of the area marker transitions from a first region to a second region different from the first region.