Vehicle Display Synchronizing Dual Unit Speed Values
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Solution Overview
Problem
Conventional vehicle display devices that show speed in both kilometers per hour (km/h) and miles per hour (mph) can cause user discomfort due to inappropriate display content and modes, particularly when one unit is zero and the other is positive, leading to confusing representations of traveling states.
Innovation Solution
A vehicle display device with a digital display and controller that corrects and synchronizes the display of speed values between km/h and mph units, setting one value to zero when the other is positive, and adjusting character sizes and display modes to reduce user discomfort, while maintaining relative positional relations and switching main display targets based on user commands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If both km/h and mph values are displayed together, then user convenience is improved, but user discomfort increases due to inconsistent representation when one value is zero and the other is positive
Solution Approach 1:
The controller dynamically adjusts the displayed parameters by correcting inconsistent speed value representations. When the vehicle is stationary, it ensures both km/h and mph display zero, eliminating the confusing state where one unit shows zero and the other shows a positive value. This parameter correction resolves the user discomfort while maintaining dual-unit display convenience.
2Object-affected harmful factors
If speed values are corrected to ensure consistency, then user discomfort is reduced, but display complexity increases due to additional correction logic
Solution Approach 1:
The controller implements a feedback mechanism that continuously monitors the speed values in both km/h and mph units. When inconsistency is detected (one value zero, the other positive), the system automatically applies correction logic to synchronize the displays. This feedback-based approach reduces user discomfort through minimal, targeted interventions rather than complex continuous adjustments.
3Loss of information
If character sizes are differentiated to highlight main display target, then information clarity is improved, but display mode complexity increases
Solution Approach 1:
The display system uses asymmetric character sizing to differentiate between the main display target and the secondary unit. By making the main display target's character size larger than the other unit's character size, the system clearly indicates which unit is primary without requiring complex display mode switches or additional visual elements. This asymmetric design simplifies information hierarchy while maintaining clarity.
Data Source
AI summary
A vehicle display device includes a digital display configured to display together a first integer value representing travel speed in kilometers per unit time and a second integer value representing travel speed in miles per unit time, and a controller configured to perform, at a time the second integer value is zero and the first integer value is positive, one of a correction to set the first integer value to zero and a correction to set the second integer value to a positive value, and display the first integer value and the second integer value on the digital display.