Multiview Camera and Diffraction Grating Display for Glasses-Free 3D
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Solution Overview
Problem
Current electronic displays, especially passive ones like LCDs and EP displays, struggle with providing a 3D viewing experience due to limitations in emitting light, and existing 3D image capture and processing techniques often result in significant time delays from image capture to display.
Innovation Solution
A multiview imaging system comprising a multiview camera with multiple cameras capturing images from different angles, and a multiview display using a multibeam diffraction grating-based backlight to produce light beams with different principal angular directions, enabling a 3D viewing experience without the need for physical adjustments and with reduced image processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple cameras are used to capture images from different angles for 3D display, then the 3D viewing experience is improved, but the image processing complexity and time delay increase
Solution Approach 1:
The patent pre-arranges the camera positions and angles to match the display's view directions before capture. This preliminary alignment ensures that captured images can be directly mapped to display views without requiring complex real-time processing, thereby reducing time delay while maintaining 3D viewing quality
Solution Approach 2:
The patent divides the scene into multiple view-specific image sets, where each set corresponds to a specific viewing direction. This segmentation allows the system to process and display only the relevant images for each viewpoint, reducing overall processing complexity and time delay compared to processing all possible views simultaneously
2Adaptability or versatility
If multiple cameras are used to capture images from different angles for 3D display, then the 3D viewing experience is improved, but the device complexity increases
Solution Approach 1:
The patent designs a camera array system where multiple cameras work together as a unified multiview capture device. This multi-functional arrangement allows the same camera configuration to capture images for multiple different viewing directions simultaneously, reducing device complexity compared to having separate capture systems for each view
Solution Approach 2:
The patent transitions from single-view to multi-view imaging by adding spatial dimensionality to the camera arrangement. By positioning cameras at specific angles and locations in three-dimensional space, the system captures multiple views without requiring complex mechanical adjustment mechanisms, thus managing device complexity through geometric optimization
3Adaptability or versatility
If traditional image processing is used to convert 2D images to 3D images, then the 3D effect is achieved, but significant time delay occurs
Solution Approach 1:
The system performs preliminary arrangement of camera positions and capture parameters to match the display's multibeam diffraction grating configuration before image capture. This pre-alignment eliminates the need for complex real-time image processing and conversion, allowing direct display of captured images and significantly reducing time delay
Solution Approach 2:
The patent extracts and eliminates complex image processing steps by using a capture system that directly produces images in the format required by the multiview display. Instead of converting 2D images to 3D through heavy processing, the system captures multiple views simultaneously and displays them directly, removing unnecessary processing time
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 glasses-free 3D viewing experience with reduced image processing, facilitating real-time capture and display of multiview images by aligning camera arrangements with display views and using diffraction gratings to direct light beams accordingly, thus overcoming the limitations of traditional displays and processing delays.
Implementation Method 1
a multibeam diffraction grating-based backlight to produce light beams with different principal angular directions
Implementation Method 2
multibeam diffraction grating-based backlight
Data Source
Figure 1A~1B
Figure 2~3A
Figure 3B~3C
AI summary
A multiview camera and multiview imaging system provide a plurality of different cropped images corresponding to a virtual screen located in a scene. The multiview camera includes a plurality of cameras configured to capture different images of a scene that have an overlapping portion in common. The multiview camera further includes an image processor configured to provide cropped images from the captured images according to a cropping window defined within the overlapping portion. The cropping window corresponds to a virtual screen located within the scene. An arrangement of the cameras corresponds to an arrangement of views of a multiview display configured to display the cropped images. The multiview imaging system further includes the multiview display.