Vehicular Rear View Camera Integrity Check Circuit
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Solution Overview
Problem
The reliance on vehicular rear view cameras for reversing can lead to safety risks due to potential errors in the display system, such as a frozen screen, which may not be detected by existing technologies.
Innovation Solution
A vehicular display system with an integrity check circuit that monitors video signals and pixel data, particularly when the vehicle is in motion, to detect any defects or lack of change, and alerts the driver through error indications on the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicular rear view display system is used as the primary source of information for drivers when reversing, then the driver can see what is behind the vehicle and avoid accidents, but any error in the display system such as a frozen screen could result in calamity
Solution Approach 1:
The integrity check circuit performs preliminary monitoring of the video signal before it is displayed to the driver. The circuit continuously checks for signal validity, pixel data integrity, and detects frozen frames or lack of motion when the vehicle is moving, preventing erroneous display of stale or corrupted video information
Solution Approach 2:
The integrity check circuit acts as an intermediary between the camera and the display device. It receives the video signal and pixel data from the camera, performs integrity verification, and only allows valid signals to reach the display, thereby protecting the driver from potentially harmful erroneous information
2Reliability
If the integrity check circuit monitors video signals and pixel data continuously, then the system can detect defective video signals and alert the driver, but this increases the complexity of the display system
Solution Approach 1:
The integrity check circuit performs self-diagnosis by monitoring its own input signals and detecting anomalies such as frozen frames, signal loss, or pixel data corruption. The system serves itself by automatically detecting and flagging its own operational issues without requiring external monitoring systems
Solution Approach 2:
The integrity check circuit monitors changes in video signal parameters such as pixel data values, signal presence, and frame-to-frame motion detection. When the vehicle is moving, the system expects corresponding changes in the video signal; lack of expected parameter changes triggers an integrity failure indication
Data Source
AI summary
A vehicular display system having a camera for producing a video signal and a display device for displaying the video signal. The display device includes an integrity check to detect a defective video signal and alert the driver if a defective video signal has been detected.