In-Vehicle Display Fallback for Instrument Cluster Failures
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Solution Overview
Problem
In-vehicle infotainment systems face challenges in ensuring safety-critical driver information is displayed when the instrument cluster display becomes temporarily or partially inoperable, violating functional safety requirements.
Innovation Solution
The IVI system dynamically reallocates and displays safety-critical content onto an infotainment display, either as a partial overlay or distinct windows, adjusting aspect ratio and resolution to ensure critical information is always visible.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the instrument cluster display is used to display driver content, then the display quality and readability of driver information is maintained, but the system reliability decreases when the display becomes temporarily or partially inoperable
Solution Approach 1:
The patent merges the driver content display capability into the infotainment display system, creating a redundant display path. When the instrument cluster display fails, the infotainment display can assume the driver content display function, ensuring continuous availability of critical driver information without loss of reliability.
Solution Approach 2:
The system prepares for potential instrument cluster display failures by pre-configuring the infotainment display with the capability to display driver content. This beforehand cushioning ensures that when the primary display fails, the backup capability is immediately available, preventing information loss and maintaining system reliability.
2Reliability
If the infotainment display is used to display driver content as a backup, then the reliability improves during instrument cluster failures, but the display resolution and aspect ratio may be compromised
Solution Approach 1:
The system dynamically adjusts the display parameters of the infotainment display when used for driver content. The aspect ratio and resolution are adaptively modified based on the content being displayed and the display's native characteristics, ensuring optimal readability while maintaining the reliability benefit of having a backup display path.
Solution Approach 2:
The patent implements parameter changes in the display characteristics of the infotainment display when it assumes the driver content display function. The system modifies resolution, aspect ratio, and other display parameters to optimize the presentation of driver information on the alternative display, balancing reliability improvement with acceptable display quality.
3Loss of information
If the infotainment display shows both user content and driver content concurrently, then the information completeness is improved, but the ease of operation decreases due to interface complexity
Solution Approach 1:
The patent segments the display content into distinct regions or layers, separating driver content from user content on the infotainment display. This segmentation allows both types of information to be displayed concurrently without excessive interface complexity, as each type of content has its designated display area with appropriate interaction protocols.
Solution Approach 2:
The system applies local quality principles by providing different interaction modes for different content types on the infotainment display. Driver content areas may have restricted or simplified interaction to prevent distraction, while user content areas maintain full interactivity, thus preserving ease of operation for non-critical functions while ensuring information completeness.
Data Source
AI summary
A method for dynamically displaying driver vehicle information within a vehicle is implemented by an in-vehicle computing system. The method includes detecting, by the computing system, in communication with a first display and a second display of the vehicle, that the first display is in a first state. The first display is configured to display driver content. The method further includes determining, by the computing system, a portion of the driver content to be displayed on the second display, and providing, by the computing system, and in response to the first state, at least the portion of the driver content for display on the second display.