Navigation Device Speed-Adaptive Map Display Control
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Solution Overview
Problem
Conventional car navigation systems distract drivers by displaying all surrounding roads, increasing the risk of accidents due to complex information, as they do not adjust their display based on driving speed.
Innovation Solution
A navigation device with a processing unit that adjusts the display of road maps based on driving speed, scale, weighted values of roads, and relative spatial relations, including fading or omitting non-essential information to focus the driver's attention on crucial road messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If all surrounding roads are displayed on the navigation screen, then the user can see complete road information, but the user becomes distracted from driving due to complex information
Solution Approach 1:
The patent applies local quality by differentiating the display treatment of different road segments based on their importance and the driver's current state. Important roads and cross streets are displayed with full visibility, while less important roads are faded or omitted. This selective display approach maintains necessary information completeness while reducing visual complexity and driver distraction.
Solution Approach 2:
The patent changes display parameters (visibility, brightness, contrast) based on the driver's moving speed. When the driver exceeds a predetermined speed threshold, the system adjusts the display parameters to simplify the road map presentation, reducing the amount of information shown and making essential information more prominent, thereby reducing distraction while maintaining safety.
2Adaptability or versatility
If cross streets with low importance are displayed, then the user can see all possible routes, but the navigation information becomes less clear and more distracting
Solution Approach 1:
The patent assigns different display qualities to different road segments based on their importance. Cross streets with high importance are displayed clearly with full visibility, while those with low importance are faded or omitted from the display. This selective approach maintains route option availability for important alternatives while ensuring navigation message clarity by reducing visual noise from less relevant roads.
3Loss of information
If the navigation system displays detailed road information at high speed, then the user can access complete navigation data, but the user's attention is diverted from the road increasing accident risk
Solution Approach 1:
The patent implements a dynamic display system that automatically adjusts the amount and type of road information shown based on the driver's moving speed. When speed exceeds a predetermined threshold, the system dynamically simplifies the display by fading or omitting less important road information and making essential navigation messages more prominent. This dynamic adaptation ensures navigation data accessibility while prioritizing driving safety by reducing visual distraction at high speeds.
Solution Approach 2:
The system changes display parameters (visibility, contrast, brightness) based on the driver's speed condition. At high speeds, the display parameters are adjusted to show only essential navigation information with reduced complexity, while maintaining access to complete navigation data in the system. This parameter adjustment resolves the contradiction by making critical information accessible while minimizing distraction-related safety risks.
Data Source
AI summary
A navigation device and a control method thereof are disclosed. The navigation device control method includes the steps of using a display unit to display at least one road map thereon; using a processing unit to determine whether a moving speed of the navigation device is larger than a speed threshold value; and if the moving speed of the navigation device is larger than the speed threshold value, the processing unit controlling the display unit to adjust a manner in which the road map is displayed on the display unit.