Adaptive Scroll Speed Control for Navigation Map Display
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Solution Overview
Problem
Existing navigation systems face challenges in efficiently scrolling map images due to limitations in available resources, leading to incomplete or distorted displays when trying to pinpoint desired locations, as they often use fixed or stepped scroll speeds that fail to adapt to changing system conditions.
Innovation Solution
A method and apparatus that dynamically adjust the scroll speed and scale factor of map images based on current system resources, including map data and processing power, to ensure smooth and intuitive scrolling, with phases of acceleration, adaptation, and deceleration to maintain essential information visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed or stepped scroll speed operation is used, then the navigation system can maintain simple operation, but the system cannot adapt to changing resources leading to blank spaces and loss of map detail
Solution Approach 1:
The patent implements dynamic scroll speed adjustment by dividing scrolling into three phases (acceleration, constant speed, deceleration) based on real-time system resource conditions. The controller monitors available resources and dynamically changes scroll parameters during operation, transforming the static fixed/stepped scroll approach into an adaptive dynamic system that optimizes performance while maintaining operational simplicity.
Solution Approach 2:
The system changes scroll speed parameters dynamically during the scrolling operation. By adjusting the scroll speed parameter across different phases (acceleration phase with increasing speed, constant phase with stable speed, deceleration phase with decreasing speed) based on system resource availability, the patent resolves the contradiction between adaptability and complexity.
2Productivity
If scroll speed is increased to browse map faster, then time consumption is reduced, but the system cannot redraw map image with sufficient detail resulting in blank spaces
Solution Approach 1:
The patent applies periodic action by structuring the scroll operation into distinct phases (acceleration, constant speed, deceleration) with specific durations and speed characteristics. This periodic structure allows the system to alternate between faster scrolling (when resources permit) and slower scrolling (when resources are constrained), maintaining both productivity and information quality through rhythmic variation in scroll behavior.
Solution Approach 2:
The dynamic adjustment of scroll speed based on real-time resource monitoring allows the system to optimize the balance between browsing speed and map detail rendering. During acceleration and constant speed phases, the system maximizes productivity when resources are sufficient, while automatically reducing speed during deceleration or resource-constrained phases to prevent blank spaces and maintain map detail visibility.
3Loss of information
If scroll speed is decreased to maintain map detail visibility, then map detail is preserved, but time consumption increases and efficiency is reduced
Solution Approach 1:
The periodic three-phase scroll structure enables the system to maintain map detail visibility during deceleration and constant speed phases while recovering efficiency during acceleration phases. This rhythmic alternation between slower detail-preserving modes and faster efficiency-oriented modes reduces overall time consumption compared to consistently slow scrolling, while ensuring map detail is never completely lost.
Solution Approach 2:
By dynamically changing the scroll speed parameter based on system resources and scroll phase, the system optimizes the trade-off between map detail visibility and time consumption. The parameter adjustment ensures that map detail is maintained during critical phases (deceleration when user may be selecting a location) while allowing faster scrolling during less critical phases, thereby reducing overall operation time without sacrificing essential information visibility.
4Loss of time
If the navigation system scrolls map image quickly, then user can reach desired location faster, but the system may display blank un-drawn spaces due to resource limitations
Solution Approach 1:
The dynamic resource monitoring and adaptive scroll speed adjustment ensure that the system maintains reliable display completeness while minimizing time loss. The controller continuously adapts scroll parameters to match available resources, preventing blank spaces from appearing during critical viewing phases while still enabling relatively fast scrolling when resources permit, thus maintaining both reliability and time efficiency.
Solution Approach 2:
The periodic three-phase scroll structure with embedded resource checks ensures that display reliability is maintained through deliberate slower phases (constant speed and deceleration) where map rendering can keep pace with scrolling, while acceleration phases provide opportunities for faster traversal when resources are sufficient. This rhythmic pattern prevents blank spaces while minimizing overall time consumption.
Data Source
AI summary
A method and apparatus for a navigation system achieves a smooth and, intuitive scrolling operation by checking available resources such as a computational power of the navigation system and map data stored in a video memory to determine an optimum scrolling operation and to dynamically adjust a scroll speed and a scale factor to move an image on a monitor screen to a specified location. The method includes the steps of: receiving a scroll signal from an input device for scrolling an image on the monitor screen, checking a current condition of the navigation system related to the scroll operation, and conducting the scroll operation while adjusting the scroll speed and scale factor of the image based on the current condition.