Vehicle Display IC Overlay for Safety-Critical Image Priority
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Solution Overview
Problem
Current display systems in motor vehicles require complex and energy-intensive setups to ensure safety-critical information is not obscured, particularly when combining safety and non-safety critical content, which increases technical effort and energy consumption.
Innovation Solution
A device with an integrated circuit that separates safety-relevant and non-safety-relevant image data processing into different circuit sections, allowing for efficient superimposition of image data within the integrated circuit, reducing the need for complex display equipment and lower energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate data streams are routed to display equipment with hardware display layers to ensure safety-critical content is always displayed in the foreground, then safety-critical information is reliably displayed, but device complexity and wiring effort increase
Solution Approach 1:
The patent segments the image data processing into two separate processing paths: a first processing path for safety-critical image data and a second processing path for non-safety-critical image data. This segmentation allows each path to be optimized independently, with the safety-critical path ensuring reliable display while the non-safety-critical path handles additional content. The segmented approach eliminates the need for complex hardware display layers while maintaining display reliability.
Solution Approach 2:
The patent extracts the safety-critical image data processing from the general image processing flow and handles it separately through a dedicated first processing path. This extraction ensures that safety-critical content receives specialized processing and prioritized display handling, independent of other display requirements, thereby ensuring reliability without requiring complex overlay hardware.
2Reliability
If lockstep operation of processors with redundant calculations is implemented to achieve ASIL C or D safety requirement level, then safety requirement level is achieved, but technical effort and energy consumption increase
Solution Approach 1:
The patent applies local quality by implementing different processing approaches for different types of image data. Safety-critical image data processed in the first processing path receives the necessary safety-level processing and verification, while non-safety-critical image data in the second processing path uses standard processing without redundant calculations. This localized application of safety processing reduces overall energy consumption while maintaining required safety levels for critical information.
Solution Approach 2:
By segmenting the processing into separate paths with different safety requirements, the patent avoids applying energy-intensive lockstep operations to all image data. Only the first processing path handling safety-critical data implements the necessary safety verification, while the second path for non-critical data uses efficient standard processing, significantly reducing total energy consumption.
3Reliability
If entire image data is processed with high safety requirement level for high resolution and high frame rate displays, then safety is ensured, but implementation effort increases significantly
Solution Approach 1:
The patent implements local quality by applying high safety requirement level processing only to the first processing path that handles safety-critical image data, while the second processing path for non-safety-critical data uses standard processing. This selective application of safety processing maintains required reliability for critical information while dramatically reducing implementation effort for the complete display system.
Solution Approach 2:
The patent applies partial action by implementing safety-critical processing only for the portion of image data that requires it (first processing path), rather than applying safety processing to the entire image data stream. This partial application of safety processing achieves the necessary reliability for safety-critical content while avoiding the excessive implementation effort that would result from processing all image data at the same safety level.
Data Source
AI summary
A device for providing image data of an image to be output on a display apparatus in a motor vehicle. The device having an integrated circuit, which includes a computing unit as a component in a first circuit section and a superimposition unit as a component in a second circuit section. The computing unit determines first partial image data relating exclusively to a portion of the image that is safety-relevant. The superimposition unit superimposes second partial image data that are not safety-relevant onto the first partial image data in such a way that the image data in the entire portion of the image, or in regions of the portion for which the first partial image data are not transparent, are predefined by the first partial image data.