QR Code Graphic Integrity Checking for Aircraft Displays
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Solution Overview
Problem
Current display monitoring techniques for aircraft displays are costly and application-specific, requiring updates whenever graphical render changes occur, and often check off-screen patterns rather than the actual image seen by pilots, which is inefficient and costly.
Innovation Solution
A method using a QR code graphic encoded with critical aircraft parameters is rendered onto the display, monitored, decoded, and compared to the original value to ensure integrity, allowing independent display monitoring that can be reused across different applications without needing to know the specific data being processed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If active display monitoring is implemented to ensure integrity of graphical display, then display reliability is improved, but system cost increases
Solution Approach 1:
The patent creates a copy of the display output image and processes it through the monitoring system. The rendering output is captured as an image, which is then decoded to extract the embedded value for comparison with the original input value. This copying approach allows monitoring without adding physical sensors or complex hardware to the display itself.
Solution Approach 2:
The patent introduces an intermediary encoding mechanism where a known value is embedded within the graphical output (such as in a legend or data field). This intermediary element serves as a mediator that carries the reference value through the rendering pipeline, allowing the monitoring system to verify integrity without directly accessing internal system states.
2Measurement precision
If application-specific display monitoring is implemented, then measurement precision is improved, but adaptability deteriorates
Solution Approach 1:
The patent creates a universal monitoring solution that works across different applications and display types. The method embeds a known value in the graphical output regardless of the specific application, captures the rendered image, decodes it, and compares values. This universal approach eliminates the need for application-specific monitoring code while maintaining precise integrity checking.
Solution Approach 2:
The patent extracts the known value from the rendered image by decoding the graphical output. The monitoring system separates the verification function from the application logic by extracting and comparing the embedded value, allowing the same monitoring mechanism to be applied universally across different applications without modification.
3Device complexity
If off-screen pattern checking is implemented, then device complexity is reduced, but reliability deteriorates
Solution Approach 1:
Instead of checking off-screen patterns and assuming they reflect on-screen display accuracy, the patent inverts the approach by embedding the known value directly in the visible graphical output that pilots actually see. The monitoring system then verifies the integrity of the actual displayed image, ensuring that what is monitored is exactly what is displayed to the user.
Data Source
AI summary
System and method of integrity checking digitally displayed data in a display system having a display comprising a pixel array with a viewable area, including rendering a known value into a QR code graphic, generating an image onto the display including drawing the QR code graphic in the viewable area of the pixel array, monitoring the generated image for the drawn QR code graphic and determining the integrity of the drawn graphical information.