Navigation Device Range Indicator Vertical Offset
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Solution Overview
Problem
Navigation devices for electric driving modes in motor vehicles struggle to provide a clear and adaptable range indicator on various types of roadmaps, often leading to confusion between the range indicator and other road elements, requiring frequent adjustments in color coding and contrast.
Innovation Solution
A navigation device with an evaluation device to determine the maximum electrical range using energy storage data, coupled with a graphic processing device to generate a vertically offset representation of the range on the roadmap, allowing the range indicator to be clearly displayed without altering the existing graphics data records, and enabling selection from different graphics data records for various driving conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the color of the range indicator line is matched to the graphics data record of the displayed roadmap, then the range indicator can be clearly differentiated from other road elements, but the display device must be frequently adapted when a new graphics data record is used
Solution Approach 1:
The patent applies dimensionality change by representing the range indicator not as a line in the 2D roadmap plane, but as a 3D vertically offset region that rises above or sinks below the roadmap surface. This vertical dimension allows the range indicator to be clearly distinguished from flat 2D road elements regardless of the graphics data record's color scheme, eliminating the need for frequent color matching adaptations.
2Ease of manufacture
If the range indicator is represented as a line on the roadmap, then it can be displayed simply, but it may be mistaken for a road element and lacks clear distinguishability
Solution Approach 1:
The patent transforms the 2D line representation into a 3D vertically offset region. This dimensional change maintains display simplicity while dramatically improving distinguishability, as the vertical offset creates a visually distinct feature that cannot be confused with flat 2D road elements.
Solution Approach 2:
The vertical offset acts as an intermediary feature between the range indicator and the roadmap background. This offset creates a visual mediator that separates the range indicator from road elements, providing clear distinguishability without complicating the overall display structure.
3Loss of information
If the edge of the action area has a nonuniform profile to reflect varying consumption, then it provides accurate information, but it becomes harder to distinguish from other roadmap elements
Solution Approach 1:
The patent resolves this contradiction by using the vertical dimension to encode consumption information. The vertical offset height varies along the nonuniform profile to reflect varying consumption rates, while the vertical offset itself maintains clear visual distinguishability from flat 2D roadmap elements. This allows both accurate information representation and clear visual distinction.
Data Source
AI summary
A navigation device has an evaluation unit for determining a maximal range, which can be traveled in the current driving operation mode with an amount of energy stored in an energy storage device of the motor vehicle, and a display unit for displaying a road map, on which a border of an action field delimited by the determined at least one maximum range is presented. A range indicator can be adapted with low expenditure to different types of road maps. On the basis of the graphic data of the road map to be indicated, a graphic processing unit produces a representation of the road map with a region that is offset in terms of height in relation to a map plane. An extension of a border of the region that is offset in terms of height corresponds to the extension of the border of the action field.