Wearable Display Reference Projection Alignment
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Solution Overview
Problem
Alignment issues in binocular displays of Extended Reality (XR) devices lead to visual discomfort and distorted depth perception due to improper calibration, optical distortions, or tracking errors.
Innovation Solution
The XR device is configured with multiple projector systems, where a second projector system, located near the bridge, is used to align the first projector system near the temple area by comparing their projections and updating the configuration to correct misalignments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple projector systems are used to improve alignment accuracy, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
A reference projection is introduced as an intermediary element between the first and second projector systems. The first projector projects alignment marks onto a reference surface, creating a reference projection that the second projector uses for alignment comparison. This intermediary reference projection simplifies the alignment process by providing a stable comparison baseline, reducing the complexity of direct multi-projector coordination while improving alignment accuracy.
2Object-affected harmful factors
If projector alignment is improved through additional image sources, then visual comfort is improved, but device complexity increases
Solution Approach 1:
The system performs preliminary alignment by projecting alignment marks and comparing them against a reference projection before the actual XR display operation. This preliminary alignment action ensures that the first and second projector systems are properly calibrated, preventing visual discomfort and distorted depth perception that would occur during operation. By resolving alignment issues beforehand, the system improves visual comfort without requiring complex real-time adjustment mechanisms during XR operation.
Data Source
AI summary
According to an aspect, a method includes generating a first projection from a first image source, the first projection displayed on a surface of a device. The method further includes generating a second projection from a second image source, the second projection displayed on the surface of the device. The method also includes identifying at least one error in an alignment associated with the first image source based on the first projection and the second projection.