Diffractive Waveguide Notch Design for Compact AR Glasses
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Solution Overview
Problem
Current augmented reality glasses are bulky and clumsy due to structural constraints, making them inconvenient for users to wear.
Innovation Solution
A display module featuring a bracket with first and second diffractive waveguides arranged to correspond to a user's eyes, where the first diffractive waveguide includes a region with a projection and a notch facing towards the second waveguide, allowing for increased space between the waveguides for additional devices and reducing the overall volume and weight of the glasses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional structural constraints are used in augmented reality glasses, then the device can be manufactured with standard components, but the glasses become bulky and clumsy
Solution Approach 1:
The display module is segmented into multiple independent diffractive waveguides (first diffractive waveguide and second diffractive waveguide) that can be separately manufactured and then assembled on the bracket. This segmentation allows each component to be optimized independently while reducing the overall volume when assembled
Solution Approach 2:
The notches in the diffractive waveguides are designed to fit together or interface with other components, creating a nested arrangement where components occupy less space. The first notch and second notch are positioned to facilitate compact integration of additional devices within the waveguide structure
2Volume of moving object
If the diffractive waveguides are arranged close to each other to reduce volume, then the glasses become more compact, but the available space for additional devices is reduced
Solution Approach 1:
The diffractive waveguides have non-uniform thickness profiles with notches at specific locations. The first diffractive waveguide has a first notch at a side close to the second diffractive waveguide, and the second diffractive waveguide has a second notch. These localized variations create spaces between the waveguides that can accommodate additional devices while maintaining overall compactness
Solution Approach 2:
The notches are positioned at specific lateral positions on the diffractive waveguides, utilizing the lateral dimension to create spacing. The first notch and second notch are arranged such that they define a space between the waveguides in the lateral direction, allowing additional devices to be positioned in this previously unused dimensional space
3Ease of operation
If the overall size of optical machines and light guide elements is reduced, then the glasses become more wearable, but the manufacturing precision requirements increase
Solution Approach 1:
The diffractive waveguides utilize diffractive optical elements that can be manufactured using photolithography and other precision fabrication techniques. The waveguide structure includes notches and features that can be copied through standard semiconductor manufacturing processes, achieving high precision without requiring custom artisanal work
Solution Approach 2:
The diffractive waveguides are designed with specific thickness parameters and notch dimensions that can be controlled through standard manufacturing processes. By optimizing these parameters (waveguide thickness, notch depth and position), the design achieves both compact size and manufacturability with conventional precision manufacturing capabilities
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 display module reduces the volume and weight of augmented reality glasses, enabling a more compact and user-friendly design by increasing the available space for devices like camera units and reducing the size of optical machines and light guide elements.
Implementation Method 1
first diffractive waveguide and a second diffractive waveguide that are arranged on the bracket
Implementation Method 2
first diffractive waveguide includes a first region that has a projection on the bracket
Data Source
AI summary
Provided are a display module and augmented reality glasses, which relate to the technical field of augmented reality. The display module includes: a bracket; and a first diffractive waveguide and a second diffractive waveguide that are arranged on the bracket, the first diffractive waveguide and the second diffractive waveguide are configured to correspond to eyes of a user in one-to-one correspondence; the first diffractive waveguide includes a first region that has a projection on the bracket, the first region has a first notch at a side thereof close to the second diffractive waveguide, and the first notch faces towards the second diffractive waveguide. This can reduce the volume of the augmented reality glasses and is beneficial to the miniaturized design of the augmented reality glasses.