HUD Display Malfunction Detection Using Panel Current Thresholds
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional HUD systems require expensive image sensors and processor-intensive image analysis, leading to slow malfunction detection and potential confusion by external light levels, posing safety hazards.
Innovation Solution
A method involving current measurement to detect display panel malfunctions by comparing the drawn current to a threshold value, triggering a light source shutdown and panel reset without external sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional HUD systems use image sensors and image analysis to detect malfunctions, then detection capability is improved, but system cost and processor requirements increase
Solution Approach 1:
The patent extracts the malfunction detection function from complex image analysis systems and implements it through simple current measurement. By measuring only the current drawn by the display panel, the system achieves reliable malfunction detection without requiring expensive image sensors or processor-intensive image analysis, directly resolving the contradiction between detection capability and system complexity
Solution Approach 2:
The patent replaces the optical/mechanical image sensing system with an electrical measurement system. Instead of using cameras to capture and analyze images of the windshield display, the system uses current measurement to detect malfunctions, substituting a complex optical-mechanical system with a simpler electrical measurement approach that maintains detection reliability while reducing cost and complexity
2Measurement precision
If image analysis techniques are used to identify HUD discrepancies, then detection accuracy is improved, but processing speed decreases and power consumption increases
Solution Approach 1:
The patent extracts only the essential detection information (current drawn by the display panel) and discards the need for full image capture and analysis. This selective measurement approach maintains sufficient detection accuracy for identifying HUD malfunctions while dramatically improving processing speed and reducing power consumption compared to comprehensive image analysis
Solution Approach 2:
The patent applies partial action by measuring only the current parameter needed for malfunction detection rather than performing complete image analysis. This partial measurement approach provides sufficient detection accuracy for safety-critical malfunction identification while achieving superior processing speed and power efficiency
3Reliability
If light sensors are used to monitor HUD display, then detection capability is improved, but susceptibility to external light interference increases
Solution Approach 1:
The patent replaces light-based sensing (optical system) with electrical current measurement (electrical system). By measuring the current drawn by the display panel rather than using light sensors to monitor the displayed image, the system achieves reliable malfunction detection that is completely immune to external light interference, as electrical current measurements are not affected by ambient lighting conditions
Data Source
AI summary
In various embodiments, a computer-implemented method includes determining a size of a display area of a display panel on which one or more images are being displayed, determining a threshold current value based on the size, measuring a first current drawn by the display panel, determining whether the first current exceeds the threshold current value, and upon determining that the first current exceeds the threshold current value, causing a second current providing power to a light source associated with the display panel to be shut off.