Stereoscopic Display Parallax Correction via Image Interchange
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Solution Overview
Problem
Conventional stereoscopic display devices combining naked-eye 3D displays and spatial imaging devices face issues with 3D normal viewing areas and 3D reverse viewing areas alternately appearing in air floating images, leading to distorted depth perception.
Innovation Solution
A stereoscopic display device with a naked-eye stereoscopic display and a flat-plate spatial imaging device using orthogonal optical reflection devices, accompanied by an image processing unit that interchanges left-eye and right-eye images in reverse viewing areas to correct parallax, ensuring accurate depth perception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a convex lens or concave mirror is used as the imaging optical system to form a three-dimensional image in the air, then the image can be displayed stereoscopically, but image distortion occurs due to aberration and the shape of the display object cannot be accurately reproduced
Solution Approach 1:
The patent uses a two-dimensional display to generate a cross-section image that is then projected through an imaging optical system to form a three-dimensional image in the air. By controlling the display image and using optical projection, the system reproduces the display object shape accurately without the aberration problems of direct lens/mirror imaging.
Solution Approach 2:
The patent replaces direct mechanical optical imaging (using convex lenses or concave mirrors to form 3D images) with a two-dimensional display-based projection system. This substitution allows for precise control of the projected image and eliminates the aberration issues inherent in traditional optical imaging systems.
2Reliability
If a naked-eye stereoscopic display combined with a spatial imaging device is used to display air floating images, then three-dimensional visualization is achieved, but 3D normal viewing areas and 3D reverse viewing areas alternate appearing causing distorted depth perception
Solution Approach 1:
The patent applies image processing to interchange the left-eye and right-eye images specifically in the reverse viewing areas. By inverting the parallax images in these regions, the system converts reverse viewing areas into normal viewing areas, eliminating the alternating pattern and providing consistent depth perception throughout the viewing area.
Solution Approach 2:
The patent applies different image processing treatments to different regions of the display. Normal viewing areas are left unchanged while reverse viewing areas undergo parallax image interchange. This localized processing approach maintains the three-dimensional visualization effect while correcting depth perception issues in specific regions.
3Reliability
If pixels displaying left-eye and right-eye images are arranged in a two-dimensional display with optical units to spatially separate them, then stereoscopic image display is achieved, but the system complexity increases
Solution Approach 1:
The patent uses a single two-dimensional display to serve multiple functions: it displays the cross-section image that forms the three-dimensional air floating image, and also provides the stereoscopic effect when combined with the imaging optical system. This multi-functionality reduces the need for separate specialized 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 avoids the alternation of 3D normal and reverse viewing areas, providing stable and accurate stereoscopic viewing experiences by processing input images to align left-eye and right-eye images correctly.
Implementation Method 1
a spatial imaging device of a flat-plate shape that includes a plurality of optical reflection devices reflecting light transmitted from an object
Data Source
AI summary
A disclosed stereoscopic display device includes: a naked-eye stereoscopic display that projects respectively-different images into observer's left eye and right eye aligned in a first direction based on input images corresponding to two viewpoints; a flat-plate-shaped spatial imaging device that includes a plurality of optical reflection devices reflecting light transmitted from an object on a first reflection surface and a second reflection surface that are orthogonal to each other, the spatial imaging device emitting light that is emitted from the naked-eye stereoscopic display and is incident to an incident surface from an emission surface to an observer side; and an image processing unit that interchanges portions corresponding to reverse viewing areas in which depth parallax and popup parallax of the input images corresponding to the two viewpoints are reversed in a case where, in an image projecting one input image, an image projecting the other input image is mixed.