Dynamic Map Scale Adjustment for Navigation Clarity
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Solution Overview
Problem
Existing on-vehicle navigation systems struggle to provide clear and accurate route guidance when the vehicle is far from the destination, as they often fail to display a detailed large-scale map of the area near important points like intersections, leading to difficulty for drivers in understanding the relationship between their position, the recommended route, and the destination.
Innovation Solution
A navigation apparatus and method that dynamically adjusts the map scale by detecting guide points and using intermediate scales to ensure the current vehicle position and next guide point are always visible on the screen, with the ability to zoom in or out at prescribed intervals, providing a detailed small-area map when necessary and a large-area map when appropriate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a small-scale map of a large area is indicated when the vehicle is far from the destination, then the overall route and destination are visible, but detailed information about important points such as intersections is lost
Solution Approach 1:
The patent implements dynamic map scale adjustment based on the vehicle's proximity to important points. The system automatically transitions between small-scale and large-scale map displays according to real-time position data, ensuring that the map scale is optimized for the current navigation context rather than remaining static
Solution Approach 2:
The patent applies different map scales to different spatial contexts: small-scale maps are used for areas far from important points to show overall route, while large-scale maps are used for areas near important points to show detailed information. This local adaptation of display quality ensures optimal information presentation throughout the journey
2Measurement precision
If a large-scale map of a small area is indicated when the vehicle is near an intersection, then detailed route information is visible, but the overall route context is lost
Solution Approach 1:
The system dynamically adjusts map scale based on the vehicle's proximity to important points. When approaching an intersection, the system automatically switches to large-scale display to provide detailed turn-by-turn guidance, then transitions back to small-scale display after passing the intersection to restore overall route context
Solution Approach 2:
The patent implements periodic switching between map scales synchronized with the vehicle's approach to and departure from important points. This rhythmic transition between detailed and overview displays occurs at regular intervals corresponding to navigation milestones, maintaining optimal information density throughout the journey
3Measurement precision
If the map scale is automatically changed when approaching important points, then detailed guidance is provided, but the animation effect during scale transition is abrupt and less visually pleasing
Solution Approach 1:
The patent divides the map scale transition into multiple discrete stages using intermediate scales. Instead of jumping directly from small-scale to large-scale, the system progresses through several intermediate magnification levels, creating a stepped but smooth visual transition that is both computationally manageable and visually pleasing
Solution Approach 2:
The patent introduces intermediate map scales as intermediary states between the initial small-scale view and the final large-scale view. These intermediate scales act as visual bridges, allowing the map to gradually reveal details while maintaining continuous display coverage and providing smooth animation effects during the transition
Data Source
AI summary
A display screen indicates a map on a first scale. After a vehicle passes a guide point, determinations are made as to whether or not an on-map position of a next guide point is outside a predetermined large-area indication deciding frame in the display screen, and as to whether or not the on-map position of the next guide point is inside a predetermined detailed indication deciding frame in the display screen. A second scale in a range where the current position of the vehicle and the on-map position of the next guide point are in the display screen is computed in response to results of the determinations. The display screen successively indicates the map on the first scale, maps on different intermediate scales between the first and second scales, and a map on the second scale in either a reducing order or a magnifying order at prescribed time intervals.