Night-view map display using decimated building light spots
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Solution Overview
Problem
Existing navigation systems struggle to display buildings clearly at small scales on maps due to limited screen resolution, leading to a featureless screen and high costs in creating and storing picture data, especially in nighttime mode where a large part of the screen appears black.
Innovation Solution
An electronic device with a navigation function that includes a memory for storing building data, a decimating unit that reduces building data based on the map's bar scale, and a display controller to show buildings on the map, using light spots to represent buildings in nighttime mode, thereby enhancing visibility and reducing clutter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If building data is displayed at small scale on a map, then the map shows more buildings and covers a larger area, but the buildings become too close together and cannot be clearly recognized due to limited screen resolution
Solution Approach 1:
The patent applies local quality by differentiating the display representation of buildings based on their spatial density and scale. At small scales where buildings are densely packed, the system uses simplified representations (such as light spots or aggregated markers) rather than detailed individual building models. This allows the map to maintain both comprehensive coverage and recognizable building representations across different display scales.
2Measurement precision
If picture data is used to display buildings at small scale, then buildings can be visualized, but high costs are involved in creating, processing, and storing the picture data
Solution Approach 1:
The patent extracts only the essential information needed for building representation at small scales, discarding unnecessary detailed picture data. Instead of storing and processing full-resolution satellite images or detailed building models, the system extracts key attributes (such as building presence, location, and basic characteristics) and represents them using simplified graphical elements. This significantly reduces data storage requirements and processing costs while maintaining adequate visualization quality.
3Reliability
If nighttime display mode is activated, then the map provides guidance information, but a large part of the screen appears black making it less appealing and potentially boring for users
Solution Approach 1:
The patent applies color changes by implementing a nighttime display mode that uses luminous representations (such as glowing light spots or illuminated markers) to depict buildings and map features. These luminous elements stand out against the dark background, providing clear navigation guidance while creating a visually engaging experience. The color and brightness characteristics are dynamically adjusted to maintain high contrast and visibility in nighttime conditions.
Data Source
AI summary
A navigation apparatus including a memory for storing building data of buildings; a display; a decimating unit for decimating the building data based on the unit of the bar scale of a map appearing on the display; and a display controller for displaying the buildings on a map on the display based on the building data decimated by the decimating unit.