Navigation System Dynamic Map Rotation Speed Control
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Solution Overview
Problem
Conventional navigation systems cause users to lose track of road changes due to sudden map rotations, which can occur when switching between display modes like north-up and head-up maps.
Innovation Solution
A navigation system and program that gradually change the display mode by increasing the speed of change after the start of the mode transition, creating a moving image where the map rotation speed starts slow and increases, then stabilizes before decreasing, to minimize user disorientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the map is gradually rotated to allow users to visually identify the rotation process, then the user can track the change, but the rotation suddenly starts and suddenly ends causing the user to lose track of road changes
Solution Approach 1:
The patent applies dynamics by making the rotation speed variable rather than constant. The rotation speed increases during the middle phase of transition and decreases during the final phase, creating a dynamic speed profile that balances user tracking needs with transition efficiency. This resolves the contradiction by making the transition smooth while maintaining reliability.
Solution Approach 2:
The patent changes the parameter of rotation speed over time during the display mode transition. By adjusting the speed parameter dynamically (increasing then decreasing), the system achieves both smooth transitions for ease of operation and maintains user tracking reliability through controlled speed variations.
2Productivity
If the display mode changes suddenly, then the transition is quick, but the user loses track of how roads and intersections have changed on the map
Solution Approach 1:
The patent uses dynamic speed adjustment during the transition process. Rather than a sudden abrupt change, the rotation speed varies over time with an increase phase followed by a decrease phase, maintaining productivity through efficient transition while preventing information loss by keeping the process observable.
Solution Approach 2:
The patent ensures continuous observable action during the display mode transition. The map rotation continues smoothly throughout the transition process with controlled speed variations, preventing sudden interruptions that would cause users to lose track of road and intersection changes.
Data Source
AI summary
There is provided a technique for reducing the possibility that a user loses track of how a road, etc., grasped by him/her have been changed on a map. A navigation system includes: a map display part that displays a map on a display in any of a plurality of display modes, the map including a current location; a moving image display part that displays, when the display mode changes, a moving image in which the map is rotated and the display mode before being changed gradually changes to a changed display mode, on the display; and a speed-of-change control part that increases a speed of change in the display mode after start of the change in the display mode.