Holographic 3D Display Using Eye Tracking and Electronic Grating
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Solution Overview
Problem
Conventional multi-viewpoint 3D display technologies are limited in the number of visual channels and cannot be miniaturized to meet modern demands for sophisticated display devices, lacking the ability to simulate a holographic 3D scene effectively.
Innovation Solution
A display apparatus and method using two front-facing 3D cameras to capture human-eye position information, calculate spatial coordinates, and control a 3D scene generating unit and electronic grating to render and direct corresponding left and right visual-channel 3D scenes into the user's eyes, allowing for holographic 3D simulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional multi-viewpoint 3D display technologies are used, then multiple visual channels can be displayed, but the number of visual channels is very limited (generally eight or slightly more viewpoints) and requires eight video cameras to capture 3D pictures
Solution Approach 1:
The display screen is divided into multiple independent display regions, each capable of displaying different visual channels simultaneously. This segmentation allows the system to present multiple viewpoints without requiring multiple cameras, as each region can be independently controlled to show content from different perspectives
Solution Approach 2:
An image processing unit acts as an intermediary between the single camera input and multiple display regions. This processing unit captures images from a single camera and generates multiple viewpoint images through computational methods, then distributes them to different display regions, eliminating the need for multiple physical cameras
2Volume of moving object
If conventional display devices are used, then basic display functions are provided, but they cannot be miniaturized to meet modern demands for sophisticated display devices
Solution Approach 1:
Multiple display regions are integrated into a single compact display screen structure. The image processing unit combines multiple camera inputs and generates all necessary viewpoint images through computational algorithms, then feeds them to the display regions. This merging of functions into a single compact system achieves miniaturization while maintaining sophisticated display capabilities
Solution Approach 2:
The patent replaces mechanical multi-camera systems with a computational approach using a single camera and image processing algorithms. Instead of physically positioning multiple cameras to capture different viewpoints, the system uses software-based image synthesis to generate multiple perspectives from a single input, enabling device miniaturization
3Adaptability or versatility
If conventional multi-viewpoint 3D televisions are used, then multiple visual channels can be displayed, but the viewing angle range is very narrow
Solution Approach 1:
The display system dynamically adjusts which display region shows which visual channel based on real-time detection of user eye position or head orientation. This dynamic content selection allows the system to adapt to different viewing angles and user positions, expanding the effective viewing angle range without requiring complex mechanical adjustment mechanisms
Data Source
AI summary
A display apparatus and a visual displaying method for simulating a holographic 3D scene are provided. The display apparatus comprises: a display screen; two front-facing 3D cameras, being configured to capture human-eye 3D position information; a 3D human-eye tracking algorithm processing unit, being configured to generate a first signal and a second signal according to the human-eye 3D position information; a 3D scene generating unit, being configured to receive the first signal, render and acquire the corresponding left visual-channel 3D scene and the corresponding right visual-channel 3D scene according to the first signal; and an electronic grating, being configured to receive the second signal and adjust the working angle according to the second signal so that the left visual-channel 3D scene is incident into the left eye of the user and the right visual-channel 3D scene is incident into the right eye of the user.