Vehicle Map Display Layout for EV Charging Reachability
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Solution Overview
Problem
Users of electrically driven vehicles face difficulty in intuitively determining whether they can reach an energy replenishing point due to the shorter reachable distance compared to gasoline-fueled vehicles, making it hard to grasp their proximity to charging facilities.
Innovation Solution
A display device is provided in the vehicle with a range calculating unit and a display control unit that superimposes the vehicle, energy replenishing point, and reachable range on a map, with the facility fixedly displayed at a prescribed position on the screen, allowing users to easily assess their distance and reachability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the user's own vehicle is displayed at the center position of the display unit, then the display layout is simple and symmetric, but the user cannot intuitively grasp the distance to the energy replenishing point
Solution Approach 1:
Instead of fixing the vehicle at the center and moving the facility with it, the patent inverts the approach by fixing the energy replenishing point at the center and moving the vehicle display position. This inversion allows the vehicle's movement to visually represent distance progression toward the facility, making distance perception intuitive while maintaining a stable reference point on the display.
2Adaptability or versatility
If the reachable range is displayed as an ellipse around the vehicle, then the display follows conventional navigation patterns, but the user cannot determine whether the vehicle can reach the energy replenishing point
Solution Approach 1:
The patent implements feedback by dynamically adjusting the reachable range display based on the vehicle's position relative to the energy replenishing point. When the vehicle is within the reachable range, the system provides visual confirmation that the facility is accessible. The display shows the relationship between the vehicle position, reachable range, and facility position, giving continuous feedback about reachability status.
Solution Approach 2:
The patent adds a contextual dimension to the display by showing not just the vehicle and facility positions, but also the reachable range as an overlay that spans both elements. This dimensional approach allows the display to convey reachability information by showing whether the facility position falls within the reachable range area, adding spatial context without requiring separate indicators.
Data Source
AI summary
This display device comprises a display provided in a moving body, a range calculation unit for calculating reachable range that the moving body can reach on the basis of the amount of remaining energy that the moving body has, and a display control unit for displaying the moving body, a prescribed facility (charging station), and the reachable range on a screen of the display such that the same are superimposed on a map and displaying the prescribed facility so as to be fixed at a prescribed position on the screen.