Suspended 3D Display Using Rotating Deflective Screen
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Solution Overview
Problem
Current 3D display technologies, such as stereoscopic, autostereoscopic, holographic, volumetric, and omni-directional view displays, fail to provide a realistic 360° field of view with multiple vertical pitching angles, leading to limited interaction and immersion, as they either require viewing aids, have restricted viewing angles, or lack occlusion and tactile experience.
Innovation Solution
A multi-pitching angle suspended space 3D display device with 360° FOV, utilizing a composite deflective diffusing screen and high-speed projector, synchronized by a detecting module and rotating drive mechanism, allowing images to be projected and rotated in synchronization to create a panoramic, interactive 3D display that can be viewed from various angles and heights without physical constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If omni-directional view 3D display uses directional diffusing screen to limit viewing angle, then each image is visible within small scope close to its view point, but surrounding viewers will see different images and cannot touch or interact with the 3D scene
Solution Approach 1:
The patent extracts the 3D image information from the traditional screen surface and suspends it in the air volume. By using a rotating diffusing screen combined with high-speed projection, the 3D images are separated from the physical screen and displayed in floating space, allowing viewers to interact with the suspended images without the constraints of traditional screen boundaries.
Solution Approach 2:
The patent transitions from 2D screen display to 3D spatial display by adding the vertical dimension. The rotating diffusing screen creates multiple viewing angles in both horizontal (360°) and vertical directions, transforming the display from a flat surface to a volumetric space where images can be suspended and interacted with from multiple dimensions.
2Ease of operation
If stereoscopic 3D display uses viewing aids such as glasses to achieve binocular parallax, then visual effects of depth are provided, but viewer will see the same 3D scene from different positions and cannot interact with the scene
Solution Approach 1:
The patent employs a rotating diffusing screen that dynamically changes the viewing angle in real-time. Combined with high-speed projection, the system can adaptively adjust which image is displayed at which spatial position, allowing viewers at different locations to see appropriate 3D scenes and interact with them, rather than viewing the same fixed scene from all positions.
Solution Approach 2:
The rotating diffusing screen acts as an intermediary between the projected images and the viewers. It mediates the light paths to direct images to specific spatial positions and viewing angles, enabling multiple viewers at different positions to experience customized 3D scenes simultaneously without requiring viewing aids.
3Loss of information
If holographic 3D display records wavefront interference fringes to reconstruct 3D image, then complete information of amplitudes and phases is retained, but enormous amount of information data and high quality spatial light modulator are required
Solution Approach 1:
Instead of recording complete wavefront interference fringes as in holography, the patent uses a simplified approach by projecting pre-processed 3D image sequences onto a rotating diffusing screen. The screen reconstructs the 3D images through its rotation and the persistence of vision, achieving complete visual information without requiring complex holographic recording and reconstruction systems.
4Ease of operation
If volumetric 3D display simulates distribution of 3D objects in physical space, then multiple persons can view with naked eyes, but 3D scene is transparent and space has no occlusion
Solution Approach 1:
The patent segments the 3D display into discrete image frames projected at different spatial positions and times. By controlling which image is projected at which position and using the rotating diffusing screen to block certain areas, the system creates the illusion of solid objects with proper occlusion relationships, rather than transparent volumetric displays.
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
Enables a realistic, immersive 3D experience with full 360° horizontal and multiple vertical pitching angles, allowing viewers to interact and observe from different heights, enhancing the sense of presence and realism by separating the display media from the physical space, thus overcoming the limitations of prior art.
Implementation Method 1
a transmitted composite deflective diffusing screen... The transmitted composite deflective diffusing screen deflects the light rays projected by the high speed projector to one side in multiple angles, and scatters in the deflecting direction
Implementation Method 2
The transmitted composite deflective diffusing screen deflects the light rays projected by the high speed projector to one side in multiple angles, and scatters in the deflecting direction
Implementation Method 3
a high speed projector... The high speed projector projects the image upwards to the transmitted composite deflective diffusing screen
Data Source
AI summary
This invention discloses a multi-pitching angle suspended space 3D display device with 360° FOV, comprising: a transmitted composite deflective diffusing screen, a high speed projector, an image generator, a detecting module and a rotating drive mechanism. The high speed projector projects the composite images of the 3D objects of different pitching angles and horizontal 360° views to the composite deflective diffusing screen that rotates at a high speed. The composite deflective diffusing screen is able to control the vertical deflecting and scattering angles and horizontal diffusing angle for incident rays with different angles, allowing the surrounding viewers at different height levels to see the images corresponding to their viewpoints, making the displayed 3D objects suspended over the composite deflecting scattering screen, of which the position does not change as the height of the viewpoint changes. The multi-pitching angle suspended space 3D display device with 360° FOV allows watching by multiple persons at multiple pitching angles and horizontal 360° FOV in naked eyes, realizing space occlusion, exploration and interaction.