AR Glasses Reflecting Mirrors Vergence-Accommodation Conflict
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Solution Overview
Problem
Current augmented reality glasses suffer from vergence-accommodation conflict and limited visible range due to the inability to focus on both virtual and real objects simultaneously, leading to dizziness and image distortion.
Innovation Solution
The use of a plurality of reflecting mirrors in augmented reality glasses to increase the depth of field and width of the image beam, allowing for a larger focusing range and visible area, thereby avoiding vergence-accommodation conflict and enhancing the field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional augmented reality optics are used, then the system can display virtual images, but the human eyes cannot focus on both the virtual image and real object simultaneously, causing vergence-accommodation conflict and dizziness
Solution Approach 1:
The patent segments the optical path into multiple distinct optical paths: one for real objects (through the transparent display) and another for virtual images (through the reflective display). This segmentation allows the eye to process real and virtual information separately, eliminating the focus conflict that occurs when both are combined in a single optical path.
Solution Approach 2:
The patent introduces a beam splitter as an intermediary element that separates the optical paths for real and virtual images. The beam splitter mediates between the transparent display showing real objects and the reflective display showing virtual images, directing them to different optical paths that converge at the eye without causing focus conflict.
2Area of stationary object
If the visible range (eye box) is made smaller to accommodate near-to-eye display optics, then the device can be compact, but the image perceived by the eye becomes distorted or incorrectly rendered
Solution Approach 1:
The patent extends the visible range in the lateral dimension by using a wide-angle lens in the reflective display optical path. This dimensional approach allows the system to achieve a larger eye box without compromising image rendering accuracy, as the wide-angle lens captures and directs a broader field of view to the user's eye.
3Area of moving object
If the field of view is increased to provide broader visualization, then the user can see more of the virtual environment, but the visible range (eye box) may be reduced
Solution Approach 1:
The patent achieves both a large field of view and a large visible range by operating in multiple optical dimensions. The transparent display provides a wide field of view for real objects, while the reflective display with wide-angle lens extends the visible range laterally. These dimensional expansions occur in different spatial planes, allowing both parameters to be maximized simultaneously.
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 effectively reduces vergence-accommodation conflict and increases the visible range, enabling users to view virtual and real objects simultaneously without dizziness, while also expanding the field of view.
Implementation Method 1
The plurality of reflecting mirrors are disposed on a path of the at least one image beam to respectively reflect the sub-beams
Data Source
AI summary
Augmented reality glasses are provided. The augmented reality glasses are adapted to be put on in front of the eyes of a user. The augmented reality glasses include at least one image source and a plurality of reflecting mirrors. The at least one image source is configured to provide at least one image beam to the eyes, and the at least one image beam has a plurality of sub-beams. The plurality of reflecting mirrors are disposed on a path of the at least one image beam to respectively reflect the sub-beams. The at least one image beam has at least one first width before being incident on the reflecting mirrors and has at least one second width after being reflected by the reflecting mirrors. The at least one second width is greater than the at least one first width.