3D Map Scrolling Incongruity in Navigation Displays
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Solution Overview
Problem
In navigation systems, the 3D display mode often results in an unnatural scrolling experience due to the wide drawing object range, causing a sense of incongruity and differing operability compared to the 2D display mode, leading to user discomfort during scrolling operations.
Innovation Solution
A method where the drawing object range in the 3D display mode is defined by a sector-shaped area with a reference position, allowing movement calculations based on the distance in the perpendicular direction to maintain consistent scrolling speeds across the display, eliminating the sense of incongruity and aligning with 2D scrolling operability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the drawing object range is made wide to display remote locations in 3D mode, then the display coverage is improved, but the scrolling operability deteriorates due to inconsistent scrolling speed perception
Solution Approach 1:
The patent applies local quality by making the scrolling speed variable across different regions of the display. Specifically, the scrolling speed at each position is determined by the ratio of the perpendicular distance at that position to the perpendicular distance at the reference position. This means that positions closer to the reference position scroll slower, while positions farther away scroll faster, creating a locally adapted scrolling experience that maintains natural perception across the entire wide drawing object range.
2Device complexity
If the drawing object range is moved uniformly in response to scrolling, then the implementation is simple, but the display image provides a sense of incongruity due to varying distances in the perpendicular direction
Solution Approach 1:
The patent changes the scrolling parameter from a uniform movement amount to a position-dependent movement amount. The movement amount at each position is calculated by multiplying a predetermined scrolling speed by the ratio of the perpendicular distance at that position to the perpendicular distance at the reference position. This parameter change ensures that the scrolling is consistent with the varying distances in the 3D perspective without requiring complex geometric transformations.
Data Source
AI summary
A drawing processing apparatus and method wherein scrolling display which provides no sense of incongruity is achieved in 3D display. 3D information is produced using information in a drawing object range extracted as a predetermined range on map data. The drawing object range of an object of the 3D drawing process is moved in response to a scrolling operation. While the drawing object range is moved, 3D image data are successively produced using the drawing object range at every point of time and outputted to implement 3D display on a display screen. Thereupon, the drawing object range to be used for the 3D drawing is moved such that individual portions in the drawing object range are moved by movement amounts determined with reference to a distance in a perpendicular direction at a reference position in the drawing object range.