Vehicle Head-Up Display Controller Safety Validation
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Solution Overview
Problem
Existing display controllers for vehicle heads-up displays may generate incorrect images due to hardware or software faults, potentially leading to dangerous situations by misrepresenting safety-relevant information.
Innovation Solution
A display controller system that includes an image processing stage, an image verifier, and a safety voter to ensure the accurate composition and validation of safety-relevant information, using image merging and filtering stages to protect critical information from being obscured by non-safety relevant data, and employing warp mapping to project undistorted images on non-planar surfaces like windshields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the display controller composes images from multiple sources including safety relevant and non-safety relevant information, then the information completeness is improved, but the reliability of safety relevant information deteriorates due to potential hardware or software faults
Solution Approach 1:
The patent segments the image data into safety relevant parts and non-safety relevant parts, applying different processing and validation rules to each segment. The verification stage specifically validates only the safety relevant parts against reference data, ensuring their integrity while allowing flexible composition with non-safety relevant information.
Solution Approach 2:
The patent introduces a verification stage as an intermediary between the image composition and display stages. This intermediary validates safety relevant parts by comparing them against reference data, acting as a mediator that ensures reliability without preventing information completeness.
2Reliability
If the display controller validates all image data including non-safety relevant parts, then the reliability is improved, but the processing time and complexity increase
Solution Approach 1:
The patent applies local quality by differentiating the validation process: safety relevant parts undergo strict validation against reference data, while non-safety relevant parts are processed without such rigorous validation. This localized approach ensures reliability where needed without unnecessary processing overhead elsewhere.
Solution Approach 2:
The patent implements partial action by validating only the necessary safety relevant parts of the image data rather than all image data. This selective validation reduces processing time and complexity while maintaining reliability for critical information.
3Loss of information
If non-safety relevant information is displayed together with safety relevant information, then the information completeness is improved, but the visibility of safety relevant information deteriorates due to potential obscuring
Solution Approach 1:
The patent performs preliminary action by validating safety relevant parts against reference data before final composition and display. This pre-validation ensures that safety relevant information is correct and can be properly prioritized in the composition stage to prevent obscuring by non-safety relevant information.
Data Source
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AI summary
The present application relates to a display controller and display system and a method of operating thereof. At a filtering stage display image data are generated on the basis of received pixel-mapped image data. The filtering operation accepts a plurality of pixels out of the received image data as input values to generate a pixel of the display image data as output value. It is further determined whether the plurality of pixels being the input values to the filtering operation are marked. If all pixels thereof are marked, the output pixel being the output value is marked. The marked pixels in the display image data are validated on the basis reference data.