Vehicle Display Control Device for Abnormal Image Prevention
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Solution Overview
Problem
In existing display systems, a time lag occurs when the vehicle shift position changes, leading to inappropriate image output and abnormal displays due to guide lines being superimposed on incorrect images.
Innovation Solution
A display control device and method that includes a first processing unit for selecting images based on a vehicle signal and a second processing unit for generating additional information, with a display controller that superimposes this information on the selected image, prohibiting output and superimposition when the vehicle state indicated by the signal is not a predetermined state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sub-microcomputer generates the guide line after the main microcomputer selects the rear image, then the guide line can be displayed with the rear image, but a time lag occurs and inappropriate images may be displayed when the shift position changes rapidly
Solution Approach 1:
The system performs preliminary actions by having the sub-microcomputer stand by ready to generate the guide line before it is actually needed. When the main microcomputer detects the reverse position and selects the rear image, the sub-microcomputer can immediately generate and output the guide line without processing delay, eliminating the time lag while maintaining display accuracy.
2Device complexity
If the guide line is generated and superimposed based on instructions received before a shift position change, then the guide line generation process is simplified, but abnormal displays occur when the vehicle state changes during processing
Solution Approach 1:
The system introduces feedback by having the sub-microcomputer detect the current vehicle state at the moment of guide line output and compare it with the state when the generation instruction was received. If the vehicle state has changed (e.g., shift position changed), the sub-microcomputer cancels the guide line output. This feedback mechanism prevents abnormal displays while maintaining relatively simple control logic.
Data Source
AI summary
There is provided a display control device having first and second processing unit. When a traveling state of a vehicle indicated by a vehicle signal, which is acquired at a point of time at which an additional information generated by the second processing unit can be output, is not a predetermined state, at least one of an output of an additional image by the second processing unit and a superimposition of the additional image is prohibited.