Vehicle Meter Indicator Virtual Data Generation
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Solution Overview
Problem
Vehicle meter indicator devices experience discomfort due to unsmooth image transitions when sensor information is acquired at shorter intervals than the frame interval, leading to a conspicuous difference in displayed rotation speed, especially during engine speed decline, causing occupant discomfort and increased computational load.
Innovation Solution
A vehicle meter indicator device with a display data generator and virtual data generator that adjusts display data based on the latest rotation speed and generates virtual data proportional to the current image when the engine speed declines, maintaining a smooth image transition without increasing the updating cycle, thus reducing computational load and discomfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the updating cycle of the on-screen image is quickened to ensure smooth display, then the sense of discomfort is reduced, but the calculation load increases and device cost rises
Solution Approach 1:
The patent applies preliminary action by pre-calculating virtual rotation speed values that will be needed for smooth display transitions. Before the updating cycle occurs, the system computes intermediate rotation speed values based on the current rotation speed and the previously displayed rotation speed, so that when display time comes, smooth transitions are already prepared without requiring increased processing power during the actual display update.
Solution Approach 2:
The patent changes the parameter of rotation speed representation by introducing virtual rotation speed values that differ from the actual sensor-measured rotation speed. Instead of directly displaying the raw sensor data, the system transforms the rotation speed parameter into a smoothed virtual value that maintains visual continuity while reducing the computational burden of frequent updates.
2Device complexity
If the frame interval is longer than the acquisition interval, then the updating cycle is reduced and computational load decreases, but the image motion produces a sense of discomfort
Solution Approach 1:
The patent introduces virtual rotation speed values as an intermediary between the actual sensor-measured rotation speed and the displayed image. This intermediary layer smooths out the discontinuities caused by the longer frame interval, allowing the system to maintain lower computational load while still providing smooth visual transitions to the occupant.
Solution Approach 2:
The system performs preliminary calculation of virtual rotation speed values that bridge the gap between actual sensor readings and displayed images. By pre-computing these intermediate values, the system can maintain longer frame intervals without causing visible discontinuities, thus reducing computational load while preserving display smoothness.
Data Source
AI summary
To show an image with minimal sense of discomfort felt by an occupant without quickening an updating cycle of an on-screen image, a virtual data generator making up a vehicle meter indicator device generates virtual data based on an arbitrary engine rotation speed between an engine rotation speed proportional to an image currently shown on a liquid crystal display device and a latest engine rotation speed rather than display data based on the latest engine rotation speed immediately before updating if the engine rotation speed declines. This allows the liquid crystal display device to show the generated virtual data on a liquid crystal panel as a virtual image for updating.