Stereoscopic Display Apparatus Compact Air Image Alignment
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Solution Overview
Problem
Existing stereoscopic display apparatuses that create the illusion of objects floating in air suffer from large size due to the need for a drive unit and cause discomfort due to alternating normal and reverse viewing areas, leading to depth parallax and jumping-out parallax issues for observers.
Innovation Solution
A stereoscopic display apparatus comprising a planar projector, a planar optical device, and a supporting unit that adjusts the optical device's orientation to ensure proper alignment of light rays, allowing for correct depth perception without the need for a large drive unit and minimizing reverse viewing areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a drive unit is used to move the two-dimensional display in a volume scanning-type three-dimensional air image display apparatus, then a three-dimensional image can be formed by displaying a cross-section image in synchronization with the moving image, but the size of the apparatus becomes very large
Solution Approach 1:
The patent replaces the mechanical drive unit that moves the two-dimensional display with a static optical system consisting of a beam splitter and multiple projectors. Instead of mechanically scanning a single display to create 3D images, the system uses multiple projectors simultaneously projecting cross-section images through a beam splitter to form the 3D image in air, eliminating the need for mechanical movement and reducing apparatus size.
2Adaptability or versatility
If a naked-eye stereoscopic display combining a spatial image forming device with a two-dimensional display is used, then an observer can recognize a floating image in the air as a stereoscopic image, but areas with normal viewing and reverse viewing alternate, causing depth parallax and jumping-out parallax issues
Solution Approach 1:
The patent divides the single stereoscopic image into multiple cross-section images that are projected at different angles and positions. By segmenting the image content and projecting them through a beam splitter system, the patent eliminates the alternating normal and reverse viewing areas that cause depth perception issues, providing consistent and accurate depth perception across the entire viewing area.
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 enables a compact stereoscopic display that provides comfortable and accurate depth perception by aligning light rays to prevent reverse viewing areas, enhancing the observer's experience with a floating image display.
Implementation Method 1
an optical unit such as a lenticular lens having a cylindrical lens arranged therein
Implementation Method 2
a real mirror image forming optical system that can form a real image of a projecting object at plane symmetrical positions with respect to one geometric plane that is a symmetrical plane as mirror images
Data Source
AI summary
A stereoscopic display apparatus includes: a projector of a planar shape that projects images by using light acquired by dividing light rays; an optical device of a planar shape that outputs incident light incident from a first face from a second face; and a supporting unit that supports at least one of the projector and the optical device to be in a first state or a second state in an orthogonal three-dimensional coordinate system. The optical device outputs incident light incident from a first point on a projection surface of the projector to a second point having plane symmetry with respect to a plane of the optical device as a reference.