Light Field Rendering for Multi-User 3D Displays
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Solution Overview
Problem
Current 3D display devices using binocular disparity fail to transfer monocular depth recognition factors, leading to unnatural 3D images and eyestrain, as they do not effectively utilize the spatio-angular distribution of rays to provide a natural 3D experience.
Innovation Solution
A rendering method and apparatus that map the positions of both eyes of multiple users to a view area, determining pixel values based on relative positions and optical elements to display stereo images, ensuring that each user receives the appropriate image based on their eye positions and ray directions, thereby enhancing the naturalness and comfort of the 3D experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If binocular disparity is used to display 3D images, then depth perception is provided to users, but monocular depth recognition factors are not transferred leading to unnatural images and eyestrain
Solution Approach 1:
The patent segments the viewing space into multiple view areas, each corresponding to different user positions. By dividing the display into multiple light field regions with distinct ray distributions, the system can provide customized depth cues for each user, transferring both binocular disparity and monocular depth recognition factors simultaneously to multiple users without causing eyestrain
Solution Approach 2:
The patent adds angular dimension to the traditional spatial display by implementing light field technology. This creates a four-dimensional display space (x, y, z, θ) where rays are distributed not only in space but also in angle, enabling natural depth perception through both binocular disparity and monocular cues by controlling ray directions toward specific user eye positions
2Object-affected harmful factors
If light field rendering is implemented for multiple users, then natural 3D images are provided to each user, but computational complexity increases due to mapping positions of multiple users to view areas
Solution Approach 1:
The patent performs preliminary mapping of multiple user eye positions to corresponding view areas before actual image rendering. By pre-calculating the mapping relationships between user positions and light field parameters, the system reduces real-time computational complexity while maintaining natural 3D image quality for each user
Solution Approach 2:
The patent creates a universal mapping framework that can handle any number of users simultaneously. The view area mapping mechanism is designed to be multi-functional, accommodating different user positions and eye configurations through a single unified approach, reducing the need for separate processing for each user
3Adaptability or versatility
If pixel values are determined based on mapped positions of multiple users, then appropriate images are displayed to each user, but processing time increases due to iterative mapping characteristics
Solution Approach 1:
The patent utilizes the periodic characteristics of light field rendering by repeating view patterns across multiple pixels and view areas. This periodic structure allows the system to determine pixel values for multiple users efficiently by leveraging the repeating nature of light field parameters, reducing processing time while maintaining user-specific image display
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 method and apparatus provide an eyestrain-free, natural 3D image by accurately mapping and displaying images to each user's position, improving the depth perception and reducing discomfort by utilizing the light field rendering technology to simulate the actual object's ray distribution.
Implementation Method 1
a view cone corresponding to a pair of the pixel included in a panel and an optical element included in an optical layer
Implementation Method 2
an optical element included in an optical layer
Implementation Method 3
the spatio-angular distribution of rays, that is, a light field refers to the distribution of rays based on positions or directions of rays output from an object
Data Source
AI summary
A rendering method for a plurality of users includes mapping positions of both eyes of a first user and positions of both eyes of a second user to a view area, the view area corresponding to a pixel. The method includes determining a value of the pixel based on the mapped positions of both eyes of the first user and the mapped positions of both eyes of the second user.