Foveated Display Apparatus Using Segmented Optical Paths
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Solution Overview
Problem
Current near-eye display technologies for virtual and augmented reality face challenges in efficiently processing high-resolution images across the entire field of view, leading to increased computational load and limited eyebox size, which affects user experience and compatibility with varying eye gaps.
Innovation Solution
A foveated display apparatus that combines a 2D image display panel with a hologram image display panel, using a light guide plate and holographic optical element to provide high resolution only in the fovea area and low resolution in the peripheral area, allowing for a narrow angle of view for the hologram and a wide angle of view for the 2D image, thereby reducing computational load and increasing eyebox size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high resolution images are displayed across the entire field of view, then image quality is improved, but computational load increases
Solution Approach 1:
The patent applies local quality by displaying high-resolution images only in the foveal region (central vision area) where human eyes have highest acuity, while displaying low-resolution images in the peripheral regions. This selective resolution approach maintains perceived image quality while dramatically reducing the computational load required for image processing and rendering.
2Measurement precision
If high resolution images are displayed across the entire field of view, then image quality is improved, but processing time increases
Solution Approach 1:
The patent applies local quality by displaying high-resolution images only in the foveal region (central vision area) where human eyes have highest acuity, while displaying low-resolution images in the peripheral regions. This selective resolution approach maintains perceived image quality while dramatically reducing the computational load required for image processing and rendering.
3Device complexity
If a single optical system is used for the entire field of view, then device complexity is reduced, but eyebox size is limited
Solution Approach 1:
The patent segments the field of view into multiple regions (foveal region and peripheral regions) and assigns different optical systems to each region. The foveal region uses a first optical system optimized for high resolution, while peripheral regions use a second optical system optimized for wide field of view. This segmentation enables a larger overall eyebox size by allowing each optical system to be optimized for its specific function.
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
This approach enhances the user experience by providing high-resolution, stereoscopic images with reduced computational load and increased eyebox size, allowing for better compatibility with different eye gaps and adjustable depth perception without causing dizziness.
Implementation Method 1
a light guide plate configured to transmit the 2D image at a first angle of view to an eye of a user
Implementation Method 2
a holographic optical element configured to transmit the hologram image at a second angle of view to the eye of the user
Implementation Method 3
holographic optical element configured to transmit the hologram image
Data Source
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AI summary
A foveated display apparatus includes a first display panel configured to form a two-dimensional (2D) image; a second display panel configured to form a hologram image comprising a three-dimensional (3D) image; a light guide plate configured to transmit the 2D image at a first angle of view to an eye of a user; and a holographic optical element configured to transmit the hologram image at a second angle of view to the eye of the user, the second angle of view being smaller than the first angle of view.