OSC Waveguide Structure for Lightweight AR/VR Color Uniformity
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Solution Overview
Problem
Existing optical elements in virtual and augmented reality devices are heavy and lack uniformity in color representation, necessitating the development of lightweight and versatile waveguides with improved color uniformity.
Innovation Solution
The use of organic solid crystal (OSC) layers in waveguides, configured with specific refractive indices and birefringence, along with alignment layers and gratings, to optimize light guidance and color uniformity, utilizing methods like solvent-, melt-, or vapor-based crystal growth, and deposition processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If traditional optical elements are used in VR/AR devices, then light guidance function is achieved, but the device weight increases and color uniformity deteriorates
Solution Approach 1:
The patent changes the material parameters by using organic solid crystal layers with specific refractive indices (nx=1.6-1.8, ny=1.6-1.8, nz=1.7-1.9) and birefringence values (0.05-0.2), which differ from traditional materials. This parameter optimization enables both reduced weight and improved color uniformity in the waveguide display system
Solution Approach 2:
The patent employs composite material structures including organic solid crystal layers combined with alignment layers and diffractive gratings. This composite approach integrates multiple functional layers, each contributing to weight reduction and color uniformity enhancement, achieving both lightweight construction and reliable optical performance
2Reliability
If organic solid crystal layers with specific refractive indices are used, then color uniformity is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies local quality by implementing alignment layers with specific molecular orientations (parallel or perpendicular to grating lines) in specific regions of the waveguide. This localized control of optical properties enables precise color uniformity management while maintaining overall structural simplicity
Solution Approach 2:
The patent optimizes manufacturing by controlling specific parameters of the organic solid crystal layers, including refractive index ranges (nx=1.6-1.8, ny=1.6-1.8, nz=1.7-1.9) and birefringence values (0.05-0.2). These parameter specifications provide clear manufacturing targets that simplify the production process while ensuring high color uniformity
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 OSC layers provide lightweight and efficient light guidance with enhanced color uniformity, enabling high-performance devices suitable for AR/VR applications.
Implementation Method 1
a waveguide body and configured to guide light by total internal reflection from an input end to an output end
Implementation Method 2
The waveguide body includes a layer of an organic solid crystal... configured with specific refractive indices and birefringence
Implementation Method 3
an input coupling structure located at the input end for coupling light into the waveguide body, and an output coupling structure located at the output end for coupling light out of the waveguide body
Data Source
AI summary
An optical element includes a waveguide body that is configured to guide light by total internal reflection from an input end to an output end, an input coupling structure located at the input end for coupling light into the waveguide body, and an output coupling structure located at the output end for coupling light out of the waveguide body, where the waveguide body includes a layer of an organic solid crystal. Such an optical element may have low weight and exhibit good color uniformity.