Rear-view Camera System with Dual Lens Switching for Distortion Control
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Solution Overview
Problem
Rear-view camera systems using wide-angle lenses provide distorted images, making it difficult for drivers to accurately recognize objects behind vehicles, especially when reversing, which increases accident risk and complicates parking etiquette.
Innovation Solution
A rear-view camera system that includes both wide-angle and standard lenses, with an optical member to switch between them based on distance or user selection, and software correction to output clear images, ensuring accurate object recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a wide-angle lens is used in the rear-view camera system, then the field of view is expanded to ensure a wide view, but the image becomes distorted with exaggerated perspective making it difficult to exactly recognize objects
Solution Approach 1:
The camera system is divided into two separate camera units: one equipped with a wide-angle lens for capturing broad scenes, and another with a standard lens for capturing undistorted images. This segmentation allows each camera to specialize in its respective function, resolving the contradiction between wide field of view and accurate object recognition.
Solution Approach 2:
The system dynamically switches between wide-angle and standard lens images based on real-time conditions such as steering angle, vehicle speed, and detected object proximity. When the vehicle is stationary or moving slowly with objects nearby, the standard lens image is displayed for accurate recognition. When the vehicle is moving faster or objects are farther away, the wide-angle image is displayed to maintain situational awareness.
2Device complexity
If only a wide-angle lens is used, then the camera system is simple in structure, but the driver cannot exactly recognize objects due to image distortion
Solution Approach 1:
Instead of using a single complex lens, the system segments the camera function into two simpler camera units with different lens types. This approach maintains relative structural simplicity while achieving the dual benefit of wide coverage and accurate recognition.
Solution Approach 2:
The system changes the optical parameter (lens type) based on operating conditions. By switching between wide-angle and standard lens configurations according to vehicle state and object distance, the system adapts to different requirements without requiring a permanently complex multi-lens structure.
3Measurement precision
If a standard lens is used, then the image provides accurate object recognition, but the field of view is limited and does not ensure a wide view
Solution Approach 1:
The system merges the outputs of two separate camera systems (wide-angle and standard lens) into a single display interface. This combination allows the driver to access both the wide field of view and the accurate object recognition information simultaneously, resolving the contradiction between these two requirements.
Solution Approach 2:
The display dynamically switches between or combines images from the wide-angle and standard cameras based on real-time driving conditions. This dynamic adaptation ensures that the appropriate view is provided for each situation, maintaining both wide coverage when needed and accurate recognition when objects are nearby.
Data Source
AI summary
Disclosed is a rear-view camera system for a vehicle. The rear-view camera system for a vehicle according to one embodiment of the present invention includes at least one wide-angle lens and at least one standard lens, and may take a rear image of the vehicle using the wide-angle lens or the standard lens. According to the embodiment of the present invention, it is possible to reduce an accident risk, while the vehicle is reversing, by providing an image taken through the wide-angle lens or an image taken through the standard lens according to a distance between the vehicle and an object located at a rear thereof or a user's selection, and also to observe rules of parking etiquette without any difficulty.