Dynamic Road Name Display for Vehicle Navigation
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Solution Overview
Problem
Conventional GPS navigation devices have limitations in displaying road names as they are fixed on the screen and may not be shown when the user's current position changes, requiring drivers to memorize information, and storing road names at close intervals increases map data volume, affecting economic feasibility and efficiency.
Innovation Solution
A method and apparatus that dynamically show road names by storing them as links matched with the map, allowing them to be displayed at interpolation points determined by user choice or current position, adjusting the display range and scale based on screen changes, and selecting the closest interpolation point to the center of the screen for optimal visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If road names are stored at close intervals on the map, then the completeness of road name coverage is improved, but the volume of map data increases
Solution Approach 1:
The patent extracts only the essential road name information from the map data structure, storing road names as separate link objects rather than embedding them throughout the map geometry. This allows complete road name coverage to be achieved while minimizing the actual storage requirements by separating naming information from spatial data.
Solution Approach 2:
The road name link structure serves multiple functions: it identifies the road, provides naming information, enables spatial queries, and supports display operations. This multi-functionality reduces the need for redundant data storage, as a single link object with road name attributes can fulfill multiple data requirements simultaneously.
2Measurement precision
If the screen changes in response to vehicle movement, then the current position accuracy is improved, but the continuity of road name display deteriorates
Solution Approach 1:
The patent implements dynamic road name display by continuously evaluating which road names should be visible based on the current screen position and orientation. Road names are dynamically added or removed from the display as the vehicle moves, ensuring that the most relevant road names are always shown while maintaining position accuracy through continuous GPS updates.
Solution Approach 2:
The system uses feedback from the current position and screen state to adjust road name display. The navigation device continuously monitors vehicle position, determines which road names are relevant to the current view, and updates the display accordingly. This feedback loop ensures that road names remain visible and meaningful as the vehicle moves along its route.
3Device complexity
If road names are fixed at specific locations on the map, then the simplicity of data structure is improved, but the adaptability to user position changes deteriorates
Solution Approach 1:
The patent transforms the static road name display into a dynamic system where road names are associated with link objects that can be selectively displayed based on current position and orientation. The link structure contains all necessary road name information, but display is controlled dynamically based on which links are visible on the current screen, providing adaptability without requiring complex repositioning of fixed elements.
Data Source
AI summary
A method and an apparatus can provide map information to a user or a driver. In the method, a range that is, based upon a current specific location on the map, currently representable on the screen, is determined. A road included in the range that is currently representable on the screen can be shown with a road name. In response to each change of at least one of the specific location or the range, the range is determined and the road with the corresponding road name can be provided.