AR Display Apparatus Using Segmented Image Renderers
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Solution Overview
Problem
Conventional augmented reality devices face limitations in size, field of view, angular resolution, and vergence-accommodation conflict, leading to strain and inability to render realistic, detailed virtual objects in a large field of view.
Innovation Solution
A display apparatus comprising context and focus image renderers, combined using optical combiners to project images with varying angular widths, simulating the human visual system's active foveation and accommodating focus changes, allowing for a wide field of view and high resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If displays are made large to cover sufficient horizontal field of view, then field of view is improved, but device size becomes too large to be accommodated in conventional augmented reality devices
Solution Approach 1:
The patent divides the display system into multiple independent displays (first display, second display, third display, fourth display) arranged in a grid pattern. Each display covers a specific angular region, and together they collectively provide a wide field of view (e.g., 90 degrees or more) while keeping each individual display compact in size, thus resolving the contradiction between large field of view and small device volume.
2Measurement precision
If display size is increased to achieve high angular resolution, then angular resolution is improved, but field of view becomes limited
Solution Approach 1:
The patent employs multiple displays (at least four) arranged in a grid pattern where each display can be optimized for high angular resolution within its specific angular region. The collective arrangement of these high-resolution segment displays achieves both high overall angular resolution and wide field of view, resolving the trade-off between these two parameters.
3Device complexity
If conventional augmented reality devices are used, then device complexity is kept simple, but vergence-accommodation conflict occurs causing eye strain
Solution Approach 1:
The patent implements dynamic optical focusing capability where the optical system can adjust focus distance to match the perceived depth of virtual objects. This dynamic adjustment allows the display to mimic natural human vision where accommodation (focusing) matches vergence (eye convergence), thereby eliminating vergence-accommodation conflict and reducing eye strain while maintaining reasonable device complexity.
4Area of stationary object
If multiple displays are used to expand field of view, then field of view is improved, but image discontinuities and seams appear between displays
Solution Approach 1:
The patent assigns different angular resolution characteristics to different displays based on their position in the grid. Central displays (first and third displays) provide higher angular resolution for the foveal vision region, while peripheral displays (second and fourth displays) provide lower angular resolution for peripheral vision. This local quality differentiation matches human visual sensitivity and enables seamless blending of images across display boundaries, eliminating visible seams while maintaining wide field of view.
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 solution enables a robust, user-friendly augmented reality experience by reducing eye strain and improving the rendering of realistic virtual objects across a large field of view, mimicking the human visual system's capabilities.
Implementation Method 1
at least one first optical combiner for combining the projection of the rendered context image with the projection of the rendered focus image to form a combined projection
Implementation Method 2
at least one second optical combiner for combining the combined projection with a projection of a real world image
Data Source
AI summary
A display apparatus, and a method of displaying via the display apparatus. The display apparatus includes at least one context image renderer for rendering a context image, at least one focus image renderer for rendering a focus image, at least one first optical combiner for combining the projection of the rendered context image with the projection of the rendered focus image to form a combined projection, and at least one second optical combiner for combining the combined projection with a projection of a real world image. An angular width of a projection of the rendered context image ranges from 40 degrees to 220 degrees. An angular width of a projection of the rendered focus image ranges from 5 degrees to 60 degrees.