Map Display Device Adapting Travel Time Visualization to Scale and Vehicle State
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Solution Overview
Problem
Current navigation devices cannot display an accessible range in an arbitrary form determined by the scale of a map and/or the running state of a vehicle, limiting their ability to provide clear and understandable travel time information.
Innovation Solution
A map displaying device that includes display means for map information, search means for calculating travel times, and time information drawing means to display travel times in various forms based on map scale and vehicle state, with features like dynamic line connections, zone representation, and input controls for adjusting travel time information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If travel time information is displayed in a fixed form, then the display is simple, but it cannot adapt to different map scales and vehicle states
Solution Approach 1:
The patent applies dynamics by making the display form of travel time information changeable and adaptable. The system dynamically adjusts the display representation (such as isochronal lines, zones, or other visual forms) based on the current map scale and vehicle running state, allowing the same underlying data to be presented in different visual formats that are optimized for the current viewing and operational context.
Solution Approach 2:
The patent implements parameter changes by varying display parameters (such as line density, zone boundaries, visual emphasis) according to map scale and vehicle state parameters. When the map scale changes or the vehicle state changes (e.g., speed, direction), the system adjusts the display parameters to maintain optimal information presentation, such as showing more detailed isochronal lines at larger scales and simplified representations at smaller scales.
2Loss of information
If all travel time information is displayed simultaneously, then complete information is provided, but the display becomes cluttered and hard to understand
Solution Approach 1:
The patent applies the extraction principle by selectively highlighting or emphasizing specific travel time information based on the current context (map scale, vehicle state, user preferences). Instead of displaying all possible travel time data uniformly, the system extracts and presents the most relevant information in a visually prominent manner, such as emphasizing the shortest route or the most relevant isochronal lines, while still maintaining access to complete information through the adaptive display system.
Solution Approach 2:
The patent implements local quality by applying different display characteristics to different regions or aspects of the travel time information. For example, the display may show detailed isochronal lines in certain areas while using simplified representations in others, or may apply different visual styles (colors, line thicknesses, patterns) to different travel time ranges or route types, making the information more distinguishable and easier to understand while preserving completeness.
3Measurement precision
If the display adapts to vehicle running state, then real-time accuracy is improved, but processing requirements increase
Solution Approach 1:
The patent applies partial action by selectively updating and recalculating only the portions of travel time information that are most relevant to the current vehicle state and map scale, rather than completely recalculating all travel time data. The system identifies which isochronal lines or zones need updating based on changes in vehicle position, speed, or direction, and processes only those specific elements, reducing the overall processing burden while maintaining accuracy for the displayed information.
Data Source
AI summary
A map displaying device for displaying an accessible range in an arbitrary display form determined in accordance with the scale of a displayed map and/or with the running state of a vehicle is provided. The map displaying device includes: a display unit for displaying map information stored in a map database; a search unit for calculating travel time information regarding a travel time to an arbitrary point accessible from a reference point; and a time information drawing unit for displaying the travel time information in a superimposed manner on the display unit by varying a display form in accordance with the scale of a map and/or with the running state of a user's vehicle.