Vehicle Display Fallback Control Using Multicore Processor Cores
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Solution Overview
Problem
Existing vehicle display devices suffer from instability when the drawing processing means malfunctions, leading to incomplete or incorrect display of vehicle information.
Innovation Solution
A vehicle display device equipped with a multicore SOC, comprising a first processor core for normal display control, a second processor core for alternative display control, and a third processor core for startup performance, ensuring reliable operation even when the first processor core malfunctions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single processor core is used for display control, then the device complexity is reduced, but the reliability deteriorates when the processor malfunctions
Solution Approach 1:
The processor is divided into multiple independent cores (first processor core and second processor core), each capable of independently controlling the display. This segmentation allows the system to maintain display functionality even when one core fails, thereby improving reliability without significantly increasing overall system complexity.
Solution Approach 2:
Different processor cores are assigned different functions: the first processor core handles normal display control while the second processor core serves as a backup for false display states. This local specialization of functionality allows each core to be optimized for its specific role while maintaining overall system reliability.
2Reliability
If drawing processing means is used for information display, then the display functionality is achieved, but the reliability deteriorates when the drawing processing means malfunctions
Solution Approach 1:
The patent implements a backup processor core that can take over display control functions when the primary drawing processing means fails. This copying approach creates a redundant system that mirrors the essential display control functionality, ensuring information display reliability without requiring complete system redundancy.
Data Source
AI summary
To provide a vehicle display device with high reliability from the viewpoint of functional stability. A vehicle display device of the present disclosure includes a display displaying an image and a multicore causing the display to display an image representing vehicle information. The includes a first processor core performing normal display control under which the display is caused to display the vehicle information in normal times, and a second processor core performing alternative display control under which the display is caused to display the vehicle information in a false display state where the vehicle information is not correctly displayed on the display under the normal display control.