Rearview Mirror Display Split-Screen for Cross-Traffic Visibility
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Solution Overview
Problem
Current vehicular vision systems lack the ability to efficiently process and display comprehensive video images from multiple cameras in a user-friendly format, particularly during maneuvers like reversing or forward driving, which can limit the driver's situational awareness and safety.
Innovation Solution
A vehicular vision system that utilizes an electronic control unit (ECU) to process image data from various cameras, including rear, side, and forward-facing cameras, and outputs these images to an interior rearview mirror display, allowing for split-screen displays and automatic adjustments based on driving conditions, providing enhanced views such as rear cross-traffic, side views, and 'see-through-hood' modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If video images from multiple cameras are displayed simultaneously, then driver situational awareness is improved, but device complexity increases
Solution Approach 1:
The display screen is divided into multiple segments or zones, with each segment showing video feed from a different camera. This segmentation allows comprehensive visual information to be presented in an organized, non-overlapping manner that maintains driver awareness while avoiding the complexity of trying to display all feeds simultaneously in a single undivided view.
Solution Approach 2:
The system transitions from displaying camera feeds in a temporal sequence (one after another) to displaying them spatially simultaneously across different segments of the screen. This dimensional change from time to space allows the driver to perceive multiple views at once without requiring complex temporal switching mechanisms.
2Manufacturing precision
If processing capabilities are concentrated at the video display device, then image processing quality is improved, but device complexity and cost increase
Solution Approach 1:
The complex image processing functions are extracted from the video display device and relocated to a separate central processing unit or gateway within the vehicle's existing infrastructure. This extraction allows the display device to remain relatively simple while still receiving high-quality processed images, as the heavy computational lifting is performed elsewhere in the system.
Solution Approach 2:
An intermediary processing unit or gateway serves as a bridge between the cameras and the display device. This intermediary performs the complex image processing, format conversion, and segmentation operations, then delivers the processed results to the display. This mediator approach maintains high image quality while protecting the display device from complexity.
3Loss of information
If the display shows all camera views simultaneously, then information completeness is improved, but ease of operation deteriorates
Solution Approach 1:
The display system dynamically adjusts which camera views are shown in which segments based on driving conditions, vehicle state, and detected driver attention. For example, during reversing the system prioritizes rear camera views, while during forward driving it emphasizes front and side views. This dynamic adaptation maintains information completeness while ensuring the most relevant information is always most accessible.
Solution Approach 2:
Different segments of the display are optimized for different purposes - some segments provide comprehensive overview while others provide detailed views of specific areas. The system assigns different quality levels and resolution allocations to different segments based on their importance, allowing the overall system to maintain completeness while making key information visually prominent and easy to interpret.
Data Source
AI summary
A vehicular display system includes an electronic control unit (ECU), a plurality of cameras including a driver-side rear corner camera and a passenger-side rear corner camera disposed at respective driver-side and passenger-side rear corner regions of the vehicle. The ECU includes an image processor operable to process image data captured by any of the plurality of cameras and generate video images. A video mirror display screen is disposed at an interior rearview mirror assembly of the vehicle and is operable to display video images provided by the ECU. Responsive to a triggering event, the ECU, via processing of image data captured by at least one of the driver-side and passenger-side rear corner cameras, generates cross-traffic view video images and provides the cross-traffic view video images to the video mirror display screen. The cross-traffic view video images are displayed in a split-screen format at the video mirror display screen.