Arcuate Display Screen with Retroreflective Layer for Stereoscopic Parallax
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Solution Overview
Problem
Existing display apparatuses suffer from low image resolution and blurriness due to projecting partial images, which limits the observer's ability to stereoscopically view clear images through motion parallax.
Innovation Solution
A display apparatus featuring an arcuate screen with a retroreflective layer and a diffusion layer that diffuses light wider in the vertical direction than the horizontal direction, combined with a projection device projecting images along orthogonal directions, allowing for improved image collection and stereoscopic viewing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If frame pictures are projected using a polygonal mirror and rotary mechanism, then stereoscopic motion parallax is achieved, but image resolution becomes low and images become blurred
Solution Approach 1:
The invention divides the projection system into multiple projecting sections arranged around the screen, with each section projecting a specific angular range of the full image. This segmentation allows the entire high-resolution image to be distributed across multiple projectors, achieving both high resolution and stereoscopic motion parallax without requiring a single complex rotating projector
Solution Approach 2:
The invention uses an arcuate (curved) screen instead of a flat screen to match the angular distribution of the multiple projecting sections. This curved geometry allows light from each projector to be properly directed to its corresponding angular range on the screen, maintaining image quality and enabling effective stereoscopic motion parallax across the entire display surface
2Adaptability or versatility
If a diffusion layer diffuses light wider in vertical direction, then multiple observers can view simultaneously, but light intensity per observer decreases
Solution Approach 1:
The diffusion layer is designed with spatially varying diffusion characteristics - stronger diffusion in the vertical direction to serve multiple observers at different heights, and controlled diffusion in the horizontal direction to maintain image sharpness. This anisotropic diffusion approach allows multiple observers to view simultaneously while preserving sufficient light intensity and image quality for each observer
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 enhances image resolution and clarity, enabling observers to stereoscopically view images with increased precision and clarity through motion parallax, even with multiple observers.
Implementation Method 1
a retroreflective layer having a reflection surface directed to the projection device
Implementation Method 2
a diffusion layer arranged on the projection device side with respect to the retroreflective layer and configured to diffuse, when transmitting light made incident from the retroreflective layer, the light wider in a first direction along the center axis than in a second direction, which is a circumferential direction centering on the center axis
Data Source
AI summary
A display apparatus includes a screen formed in an arcuate shape centering on a center axis and a projection device configured to project, along projecting directions orthogonal to the center axis and different from one another, images corresponding to the projecting directions on the inner circumferential surface or the outer circumferential surface of the screen. The screen includes a retroreflective layer having a reflection surface directed to the projection device and a diffusion layer arranged on the projection device side with respect to the retroreflective layer and configured to diffuse, when transmitting light made incident from the retroreflective layer, the light wider in a first direction along the center axis than in a second direction, which is a circumferential direction centering on the center axis.