Arc Transmissive Screen Projection System for Stereoscopic Resolution
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Solution Overview
Problem
Existing display apparatuses using motion parallax for stereoscopic visual recognition suffer from low resolution and blur due to the reflection of frame images by a polygonal mirror, limiting the clarity and quality of the stereoscopic image observed by the viewer.
Innovation Solution
A display apparatus featuring a transmissive arc-shaped screen with projection devices arranged around a center axis, where image lights are projected to be wider along the axis and narrower in the circumferential direction, allowing partial images from multiple projection devices to be combined into a single stereoscopic image at various viewpoints, with a display control device optimizing image projection and light direction to enhance resolution and reduce brightness unevenness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If frame images are reflected by a polygonal mirror to enter the screen, then stereoscopic visual recognition using motion parallax is enabled, but the observed images are only small areas in the projected images resulting in lower resolution and blur
Solution Approach 1:
The invention divides the projection system into multiple projection devices arranged around the screen, with each device projecting to a specific viewpoint. This segmentation allows each projector to contribute to a specific portion of the final image, enabling high-resolution stereoscopic visualization without requiring a single complex polygonal mirror system
Solution Approach 2:
The invention transitions from a two-dimensional projection approach to a three-dimensional arrangement by positioning multiple projection devices around the screen in space. This spatial distribution in the third dimension allows light to enter the screen from multiple angles, creating high-resolution images at different viewpoints without the complexity of traditional mirror-based systems
2Adaptability or versatility
If multiple projection devices project image lights on the screen from different positions, then stereoscopic images at multiple viewpoints are formed, but brightness unevenness and flicker may occur
Solution Approach 1:
The invention applies local quality by having each projection device optimized for its specific viewpoint position. The screen's light diffusion characteristics are tailored to distribute light appropriately from each projection position, ensuring uniform brightness across all viewpoints while maintaining the ability to present different stereoscopic images at different positions
Solution Approach 2:
The invention uses periodic action through time-division multiplexing, where projection devices alternate projecting images for different viewpoints in rapid succession. This periodic projection, synchronized with the persistence of human vision, creates stable stereoscopic images at multiple viewpoints without visible flicker
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 improves the resolution and clarity of the stereoscopic image by aligning partial images from multiple projection devices, allowing for clear and natural visual recognition of the observation object using motion parallax, while also reducing power consumption and minimizing flicker and brightness inconsistencies.
Implementation Method 1
a transmissive screen formed in an arc shape forming at least a part of a cylindrical shape around a center axis, and, when light entering an inner circumferential surface is output from an outer circumferential surface, having a diffusion angle in a first direction as a direction along the center axis wider than a diffusion angle in a second direction as a circumferential direction around the center axis
Data Source
AI summary
A transmissive screen formed in an arc shape around a center axis, and, when light entering an inner circumferential surface is output from an outer circumferential surface, having a diffusion angle in a first direction as a direction along the center axis wider than a diffusion angle in a second direction as a circumferential direction around the center axis, projection devices that are arranged at equal intervals along the second direction around the center axis and respectively project image lights on the inner circumferential surface, and a display control device that allows the projection devices to project the image lights so that partial images formed by portions of the respectively projected image lights of the projection devices may be observed as one visually recognized image having the partial images arranged in the second direction at viewpoints set outside of the outer circumferential surface along the second direction are provided.