Dynamic Magnification Adjustment for In-Vehicle 3D Displays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional in-vehicle display systems fail to accurately adjust the size of virtual images based on the actual distance to objects, leading to discomfort and difficulty in recognizing objects due to size discrepancies between real and virtual images, and performance degradation in perceiving objects as distance increases.
Innovation Solution
An in-vehicle display system that includes an imaging unit, detector, visual point identifier, measuring unit, and image generator to capture and analyze the visual field, detect eyeball and sight line positions, measure object distances, and generate display images at a dynamically adjusted magnification ratio based on the distance between the occupant and the object, ensuring the size of the virtual image matches the perceived size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the display size of the virtual image is increased to prevent it from becoming too small when the object is distanced, then the virtual image remains visible in the visual field, but the driver feels discomfort regarding depth due to a difference in size between the real image and the virtual image
Solution Approach 1:
The patent changes the magnification parameter dynamically based on object distance. Specifically, it adjusts the magnification ratio of the virtual image to match the actual size of the object at different distances, rather than using a fixed magnification. This resolves the contradiction by making the virtual image size proportional to the object distance, maintaining visibility while preserving depth perception accuracy.
2Measurement precision
If the display size of the three-dimensional virtual image is geometrically reduced at a given ratio in accordance with the distance, then the visual angle is maintained, but deviation occurs between the size perceived by the driver and the size of the object as the distance increases
Solution Approach 1:
The patent applies dynamics by making the magnification ratio variable rather than fixed. The magnification ratio is adjusted dynamically based on the object distance, increasing as distance increases to compensate for the natural perspective reduction. This dynamic adjustment maintains both visual angle accuracy and size perception accuracy, resolving the contradiction between geometric reduction and perceived size.
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
This solution reduces size deviations between virtual and real images, enhancing the occupant's ability to perceive objects and improving identification, especially at greater distances, thereby improving overall perceptive performance.
Implementation Method 1
an imaging unit for imaging a visual field and capturing an image of the visual field
Implementation Method 2
a display image generator for generating display images to be displayed on a virtual plane, fused by binocular parallax on a fusion plane to provide a three-dimensional display on a visual field
Data Source
AI summary
An imaging unit captures an image of a visual field. A detector detects a position of an eyeball and a sight line of an occupant. A visual point identifier identifies a position of a visual point of the occupant in the visual field, the eye position and the sight line direction. A measuring unit measures a position and a distance of an object included in the image of the visual field. An image generator generates display images based on the eye position and the position and the distance of the object. The display images are displayed on a virtual plane, fused on a fusion plane and displayed as a three-dimensional display on the visual field. The display images are generated to display the three-dimensional image at a given magnification ratio calculated by reducing a geometric display magnification ratio as the distance from the occupant increases.