Rearview Mirror Display With On-Demand Blind Spot Overlay
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Solution Overview
Problem
Current systems for processing video images from rearward and side cameras in vehicles do not effectively provide a comprehensive view of blind spots, limiting the driver's ability to monitor areas to the sides and rear simultaneously without obstructing the primary rearview.
Innovation Solution
A rearview display system that integrates video streams from rear, right-side, and left-side cameras, using a processing circuit to generate composite video streams with side camera views superimposed in specific corners of the rearview stream, triggered by active spotter signals, such as turn signals or blind spot detectors, to provide an on-demand spotter view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If side camera views are continuously displayed to provide comprehensive blind spot coverage, then visibility of blind spots is improved, but obstruction of primary rearview increases
Solution Approach 1:
The system activates side camera views periodically or on-demand based on trigger events such as turn signals, blind spot detection, or lane change detection, rather than continuously displaying them. This allows the primary rearview to remain unobstructed during normal operation while providing comprehensive blind spot coverage when needed.
Solution Approach 2:
The side camera views are superimposed in specific localized regions (upper corners) of the composite video stream rather than across the entire display area. This allows blind spot information to be provided in specific locations without obstructing the overall primary rearview image.
2Loss of information
If multiple video streams are integrated into composite display, then comprehensive view of surroundings is improved, but device complexity increases
Solution Approach 1:
The system pre-processes and buffers video streams from multiple cameras before composite display is needed. Video streams are received, synchronized, and prepared in advance, allowing rapid composition when triggered without real-time processing delays.
Solution Approach 2:
The system creates composite video streams by copying and superimposing portions of pre-captured video streams rather than processing raw data in real-time. This reduces computational complexity while maintaining comprehensive situational awareness.
Data Source
AI summary
A rearview display system is provided for a vehicle having: a rear camera generating a rearward video stream, a right-side camera generating a right-side stream, and a left-side camera generating a left-side stream. The system includes a processing circuit for generating a composite video stream from: (a) the rearward stream and the right-side stream, (b) the rearward stream and the left-side stream, and (c) at least the rearward stream. When the composite stream is formed from the rearward stream and the right-side stream, the rearward stream extends across the whole composite stream with the exception of a right corner where the right-side stream is superimposed over the rearward stream. When the composite stream is formed from the rearward stream and the left-side stream, the rearward stream extends across the whole composite stream with the exception of a left corner where the left-side stream is superimposed over the rearward stream.