Vehicle Distance Display Control for Intersection Passing Judgment
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Solution Overview
Problem
In scenarios where an autonomous vehicle is approaching an intersection without traffic lights and a non-autonomous vehicle attempts to enter, the driver of the non-autonomous vehicle may misjudge the distance and timing, leading to potential collisions or unnecessary braking.
Innovation Solution
A display control device and system that utilizes external sensors to calculate and display distance information to drivers of approaching vehicles, adjusting the display based on changing distances and times to collision, using a combination of character and image information to convey the distance and urgency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no distance information is provided to the other vehicle, then the autonomous vehicle can maintain its autonomous operation without additional systems, but the driver of the other vehicle cannot accurately judge the distance and timing, leading to potential collisions or unnecessary braking
Solution Approach 1:
The patent introduces a display device as an intermediary communication channel between the autonomous vehicle and the other vehicle. The display device mounted on the autonomous vehicle shows distance information to the driver of the other vehicle, mediating the interaction and enabling safe passage without direct human-to-human communication or complex autonomous negotiation protocols
Solution Approach 2:
The patent replaces complex mechanical judgment processes (driver estimating distance through visual cues, speed, and experience) with an electronic information display system. The display device electronically communicates precise distance information to the other driver, substituting human sensory estimation with direct digital information transmission
2Reliability
If the autonomous vehicle slows down or stops to allow the other vehicle to pass, then collision risk is reduced, but traffic flow efficiency decreases and unnecessary braking occurs due to driver misjudgment
Solution Approach 1:
The display device provides distance information to the other driver in advance, before the autonomous vehicle needs to brake or stop. This preliminary information allows the other driver to make accurate timing decisions and pass through the intersection without causing the autonomous vehicle to slow down, thereby maintaining traffic flow efficiency while ensuring safety
Solution Approach 2:
The system establishes a feedback loop where the autonomous vehicle's distance and speed information is continuously displayed to the other driver. This real-time feedback enables the other driver to adjust their acceleration and timing decisions dynamically, allowing smooth passage without requiring the autonomous vehicle to make abrupt speed changes
3Measurement precision
If the display device shows detailed distance information continuously, then the other driver can accurately judge distance and timing, but energy consumption increases and driver attention may be overwhelmed
Solution Approach 1:
The display device updates distance information periodically rather than continuously, refreshing the display at intervals based on changes in relative distance or speed. This periodic update approach maintains accurate distance judgment for the other driver while significantly reducing energy consumption compared to continuous high-frequency updates
Solution Approach 2:
The display device shows only the essential distance information needed for safe passage judgment, rather than providing complete autonomous vehicle status data. This partial information approach provides sufficient accuracy for the other driver to make timing decisions without overwhelming them with excessive data, while consuming less energy than a comprehensive display would require
Data Source
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AI summary
To assist a driver of another vehicle attempting to pass in front of a host vehicle in recognizing the distance to the host vehicle and the time until the host vehicle approaches. A control ECU controlling a display operation of a display medium that is mounted in a vehicle and displays information toward a traveling direction of the vehicle recognizes, based on a recognition result of an external sensor mounted in the vehicle, a distance between the vehicle and another vehicle present in the traveling direction of the vehicle, causes the display medium to display distance information used for announcing the recognized distance between the vehicle and the other vehicle, and changes the distance information displayed on the display medium in accordance with a change in the recognized distance between the vehicle and the other vehicle.