Vehicle Speed Display with Difference Region
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Solution Overview
Problem
Conventional speed displaying devices have poor visibility due to overlapping markings and difficulty in recognizing acceleration or deceleration when displaying the difference between vehicle speed and set speed, making it hard to determine if the vehicle is accelerating or decelerating towards its target speed.
Innovation Solution
A speed displaying device and method that displays a speedometer with a scale, a controller to show current and target speed positions, and a speed difference region as an area outside the scale, using varying luminosity or color density to indicate the difference between current and target speeds, with the region's color changing based on the direction of the speed difference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the speed difference region is displayed overlapping on marks or numbers on the dial face, then the speed difference can be visually represented, but the visibility deteriorates due to overlap with existing markings
Solution Approach 1:
The speed difference region is displayed in a dimension outside the traditional dial face scale, positioned between the current speed and target speed positions rather than overlapping existing markings. This spatial repositioning resolves the conflict between displaying speed difference information and maintaining visibility of dial face elements.
Solution Approach 2:
The display is segmented into distinct regions: the traditional dial face with marks and numbers, and the separate speed difference region displayed between the pointer positions. This segmentation allows both the speed difference information and the dial face markings to be visible without mutual interference.
2Loss of information
If the speed difference region is displayed with high density near the speed setting position, then the target speed becomes more prominent, but the overall visibility may be affected
Solution Approach 1:
The speed difference region employs non-uniform density or luminosity distribution, with higher density near the target speed position and lower density near the current speed position. This gradient approach emphasizes the target speed as the reference point while maintaining overall visual balance and preventing excessive contrast that would harm general visibility.
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
A speed displaying device is provided in a vehicle that travels to reach a set target speed, and displays a speedometer (30) which indicates a speed of the vehicle. The speed displaying device includes a speedometer (30) having a scale (32) and a controller that controls to display a pointer (36) pointed position which indicates a position of current speed of the vehicle in the scale of the speedometer, a speed setting position (41) which indicates a position of the target speed in the scale of the speedometer, and a speed difference region (45) which indicates the size of the difference between the current speed and the target speed with an area on the speed meter. The speed difference region Is displayed at a position near the scale of the speedometer.