Adaptive Rearview Display Mirror Using Driver Head Position
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Solution Overview
Problem
Traditional rearview mirrors in vehicles provide limited field of view and do not adapt dynamically to the driver's head position or movement, lacking the ability to offer a wide-angle view and glare reduction effectively.
Innovation Solution
A smart rearview display system that uses a wide-angle camera and driver sensors to adjust the displayed field of view based on the driver's head position, providing a dynamic and adaptive view similar to a traditional mirror, with the ability to zoom in and offer a 180-degree rear field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional rearview mirror is used, then the device complexity is low, but the field of view is limited and cannot adapt to driver's head position
Solution Approach 1:
The system dynamically adjusts the displayed field of view based on real-time detection of the driver's head position using cameras and sensors. The display content changes continuously as the driver moves their head, providing an adaptive viewing experience that mimics traditional mirror behavior while expanding the field of view.
Solution Approach 2:
The patent introduces intermediate components including driver detection cameras, position sensors, and electronic processing systems that mediate between the wide-angle camera feed and the display screen. These intermediaries enable the system to interpret driver intent and adjust the display accordingly, bridging the gap between fixed camera views and adaptive mirror behavior.
2Area of stationary object
If a wide angle camera is used to capture images, then the field of view is expanded, but the image distortion increases
Solution Approach 1:
The system dynamically changes display parameters including field of view angle, zoom level, and image cropping based on detected driver head position. When the driver looks straight ahead, the system displays a centered view with standard geometry. When the driver looks to the side, the system adjusts the displayed portion and angle to maintain natural spatial relationships, effectively compensating for wide-angle distortion through parameter adjustment.
Solution Approach 2:
The patent applies different display characteristics to different regions of the wide-angle field of view. The center region maintains standard geometry for straight-ahead viewing, while peripheral regions are selectively cropped or distorted less aggressively based on detected driver gaze direction. This local quality adjustment ensures that the most important viewing areas maintain geometric accuracy.
3Adaptability or versatility
If the display adjusts dynamically to driver's head position, then the adaptability improves, but the processing complexity increases
Solution Approach 1:
The system implements continuous feedback loops where cameras and sensors monitor driver head position, the processor analyzes this data to determine gaze direction, and the display adjusts accordingly. This closed-loop feedback enables automatic adaptation without requiring complex predictive algorithms, as the system simply responds to real-time driver positioning data.
Solution Approach 2:
The system performs self-adjustment based on detected driver position without requiring manual intervention or complex external control. The automatic detection and adjustment mechanisms enable the display to serve itself by adapting to driver needs autonomously, reducing the complexity of user interfaces and control systems.
4Area of stationary object
If a camera-based rearview system is used, then the field of view can be widened, but the object detection accuracy may decrease
Solution Approach 1:
The system captures excessive visual information using a wide-angle camera that covers more than the traditional mirror field of view. Rather than attempting to process and maintain precision across the entire wide angle, the system selectively focuses on relevant portions based on detected driver head position, effectively using partial action to maintain detection precision where needed while accepting reduced precision in peripheral areas.
Data Source
AI summary
A motor vehicle includes a driver sensor detecting a position of a human driver of the motor vehicle. A rear view camera captures images of an environment behind the motor vehicle. A display screen is disposed within a passenger compartment of the motor vehicle. An electronic processor is communicatively coupled to each of the driver sensor, the rear view camera, and the display screen. The electronic processor receives images captured by the rear view camera, receives outputs of the driver sensor, determines a position of the driver's head or eyes dependent upon the outputs of the driver sensor, and transmits video signals to the display screen. The video signals are dependent upon the determined position of the driver's head or eyes and dependent upon images captured by the rear view camera.