Rear-view Image Display Device with Dynamic View-angle Adjustment
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Solution Overview
Problem
Existing image display devices for vehicles struggle to accurately convey the distance between the vehicle and objects behind, as the size of displayed objects can differ significantly from their reflections in optical inner mirrors, making it difficult for drivers to gauge distances.
Innovation Solution
An image display device that includes a camera, a rear-view-image display unit with a mirror surface, a distance obtainer, and a cutout-image creator, which adjusts the view-angle value based on the vehicle-to-vehicle distance to ensure the size of displayed objects matches their reflections in the mirror, thereby reducing size discrepancies and enhancing driver perception of distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the camera is mounted at a rear of an optical inner mirror to capture rear-view images, then the display can show rear-view images to the driver, but the size of displayed objects differs from their reflections in the mirror, making it difficult for the driver to grasp distance
Solution Approach 1:
The system dynamically changes the view-angle parameter based on detected distance to objects. When an object is detected, the control unit adjusts the view-angle value so that the size of the object in the displayed image matches its size in the mirror reflection, ensuring consistent size perception and accurate distance judgment by the driver.
Solution Approach 2:
The system uses distance detection feedback from the distance detector to continuously adjust the view-angle parameter. The control unit receives distance information and modifies the image display parameters accordingly, creating a closed-loop system that maintains size consistency between displayed images and mirror reflections based on real-time distance feedback.
2Device complexity
If a fixed view-angle is used for displaying rear-view images, then the display system is simple, but the size of displayed objects does not match mirror reflections at different distances, reducing driving safety
Solution Approach 1:
The system transitions from a static fixed view-angle to a dynamic adjustable view-angle that changes based on detected object distances. The control unit automatically modifies the view-angle parameter in response to distance variations, ensuring that object sizes in the display consistently match mirror reflections regardless of distance, thereby maintaining driving safety without excessive complexity.
3Measurement precision
If the view-angle value is adjusted to match object sizes between display and mirror, then distance perception accuracy improves, but the device complexity increases due to additional control mechanisms
Solution Approach 1:
The control unit performs multiple functions: it detects objects, determines distances, calculates appropriate view-angle values, and adjusts display parameters all within a single integrated component. This multi-functionality reduces overall system complexity despite the added capability of dynamic view-angle adjustment, as it consolidates control functions rather than adding separate dedicated components for each function.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces the difference in size between displayed and reflected objects, improving the driver's ability to grasp distances between vehicles, especially when the vehicle-to-vehicle distance is small, by dynamically adjusting the view-angle value based on obtained distances.
Implementation Method 1
a rear-view-image display unit comprising (i) a mirror surface configured to reflect a view behind the vehicle
Data Source
AI summary
An image display device includes: a camera that takes a rear-view image; a rear-view-image display unit including a mirror surface and a display for displaying the rear-view image; a distance obtainer that obtains a distance between a vehicle and a following vehicle; a cutout-image creator that cuts out a cutout image from the taken rear-view image based on a view-angle value; and a display controller that creates, based on the cutout image, a display image matching a size of a display region of the display and controls the display to display the created display image. The cutout-image creator is configured to, based on the obtained distance, determine the view-angle value to such a view-angle value that a size of the following vehicle to be displayed on the display image is equal to a size of the following vehicle that is to reflect in the mirror surface.