Collimator-Based AR Display Calibration
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Solution Overview
Problem
Current AR display systems face challenges in maintaining precise alignment between left and right displays due to thermal fluctuations, mechanical stresses, and aging, leading to user discomfort and degraded AR experience.
Innovation Solution
A user-operable calibration device is provided for wearable AR display systems, enabling precise alignment of left and right displays through a collimating alignment apparatus that projects an optical alignment pattern, allowing users to adjust the alignment digitally or physically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rigid structures are used to stabilize displays, then alignment stability is improved, but weight and bulk increase
Solution Approach 1:
The patent applies preliminary action by providing calibration instructions to the user before alignment degradation becomes problematic. The system proactively guides users through self-calibration procedures to prevent misalignment issues from developing, rather than waiting for problems to occur and then requiring professional service.
Solution Approach 2:
The patent enables self-service by allowing users to perform calibration operations themselves using provided instructions and visual feedback. Users can adjust alignment parameters without requiring specialized equipment or professional assistance, making the system self-maintaining and eliminating the need for heavy stabilization structures.
2Measurement precision
If additional hardware components are added for real-time alignment adjustments, then alignment precision is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical adjustment systems with a software-based calibration approach. Instead of using sensors, actuators, and real-time mechanical adjustment mechanisms, the system uses visual feedback patterns and user-guided digital calibration to achieve precise alignment, significantly reducing hardware complexity.
Solution Approach 2:
The patent uses visual copying by projecting alignment patterns and reference images that users can observe and use to adjust their own alignment. The system creates visual copies of the desired alignment state, allowing users to replicate the correct configuration without requiring complex sensing and actuation hardware.
3Measurement precision
If professional realignment services are used, then alignment accuracy is improved, but service cost and user convenience worsen
Solution Approach 1:
The patent enables users to perform calibration operations themselves using provided instructions and visual feedback. Users can adjust alignment parameters without requiring specialized equipment or professional assistance, making the system self-maintaining and eliminating the need for heavy stabilization structures.
Solution Approach 2:
The patent introduces feedback by providing users with visual alignment patterns and instructions that show the current alignment state and guide adjustments. This real-time visual feedback loop allows users to iteratively improve alignment accuracy on their own, replacing the need for professional service while maintaining high precision.
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 enables users to recalibrate their AR display systems effectively, enhancing user comfort and visual experience by maintaining optimal display alignment, thus reducing the need for professional realignment and associated costs.
Implementation Method 1
a collimating alignment apparatus operable to project an optical alignment pattern
Data Source
AI summary
Systems, techniques, and devices are provided for calibrating wearable augmented-reality display systems. A support frame is configured to be removably coupled to a wearable augmented-reality display system. The support frame is coupled to a collimator comprising one or more collimating optical elements and to a graticule, which aligns with one or more alignment indicators emitted from the wearable augmented-reality display system.