AR Glasses Self-Aligning Optical Element via 2:1 Gear Ratio
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Solution Overview
Problem
Existing virtual reality glasses require a rigid alignment system with sensors and actuators, increasing weight and volume, which limits their slim and light form factor and user comfort.
Innovation Solution
A self-alignment unit using a mechanical mechanism with gears, specifically a 2:1 gear ratio, automatically adjusts the out-coupling angle in response to changes in the in-coupling angle, eliminating the need for separate sensors and actuators, allowing for a lighter and more comfortable design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a rigid alignment system with sensors and actuators is used to align in-coupling and out-coupling angles, then alignment accuracy is improved, but weight and volume increase
Solution Approach 1:
The optical element is designed to automatically align the in-coupling and out-coupling angles through its own structural characteristics, eliminating the need for external sensors and actuators. The self-service mechanism uses the inherent properties of the optical element to achieve alignment without requiring additional active components that would increase weight and volume.
Solution Approach 2:
The invention extracts and removes the alignment system from the conventional configuration by eliminating sensors and actuators. Instead of adding these components to achieve alignment, the solution takes out the need for such components entirely by designing the optical element to inherently provide the necessary angle alignment through its structure.
2Measurement precision
If a rigid alignment system with sensors and actuators is used to align in-coupling and out-coupling angles, then alignment accuracy is improved, but device volume increases
Solution Approach 1:
The optical element is designed to automatically align the in-coupling and out-coupling angles through its own structural characteristics, eliminating the need for external sensors and actuators. The self-service mechanism uses the inherent properties of the optical element to achieve alignment without requiring additional active components that would increase weight and volume.
Solution Approach 2:
The invention extracts and removes the alignment system from the conventional configuration by eliminating sensors and actuators. Instead of adding these components to achieve alignment, the solution takes out the need for such components entirely by designing the optical element to inherently provide the necessary angle alignment through its structure.
3Stability of the object's composition
If metal members are used to secure rigidity for the alignment system, then structural stability is improved, but weight and volume cannot be reduced
Solution Approach 1:
The optical element is designed to automatically align the in-coupling and out-coupling angles through its own structural characteristics, eliminating the need for external sensors and actuators. The self-service mechanism uses the inherent properties of the optical element to achieve alignment without requiring additional active components that would increase weight and volume.
Solution Approach 2:
The invention employs a non-metallic, lightweight structural design that maintains necessary rigidity without relying on heavy metal members. The optical element and its mounting structure are designed to provide sufficient structural stability through optimized geometry and material selection, enabling weight reduction while maintaining alignment functionality.
4Stability of the object's composition
If metal members are used to secure rigidity for the alignment system, then structural stability is improved, but device volume cannot be reduced
Solution Approach 1:
The optical element is designed to automatically align the in-coupling and out-coupling angles through its own structural characteristics, eliminating the need for external sensors and actuators. The self-service mechanism uses the inherent properties of the optical element to achieve alignment without requiring additional active components that would increase weight and volume.
Solution Approach 2:
The invention employs a non-metallic, lightweight structural design that maintains necessary rigidity without relying on heavy metal members. The optical element and its mounting structure are designed to provide sufficient structural stability through optimized geometry and material selection, enabling weight reduction while maintaining alignment functionality.
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 configuration enables a cost-effective, slim, and light virtual reality device with automatic alignment of in-coupling and out-coupling angles, enhancing user comfort and reducing structural rigidity, while maintaining accurate image display.
Implementation Method 1
the optical system is designed to perform in-coupling of a virtual image corresponding to digital or virtual objects and propagate the virtual image by total internal reflection (TIR) and then perform out-coupling of the virtual image
Data Source
AI summary
Provided is an electronic device using a virtual reality, which is capable of self-aligning an in-coupling angle and an out-coupling angle by using a mechanical mechanism. An electronic device according to an aspect of the present invention includes: a glass body including a frame; an optical engine mounted on a leg of the frame and generating and emitting an image; an optical element mounted on the frame and performing in-coupling and out-coupling of the image emitted from the optical engine and displaying the corresponding image to a user; and a self alignment unit automatically aligning an in-coupling angle and an out-coupling angle of the optical element.