Head-wearable Display Misalignment Correction via Strategic Pattern Timing
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Solution Overview
Problem
Existing augmented reality devices face challenges in accurately aligning left and right displays due to misalignment issues caused by mechanical, thermal, and lifetime drift factors, leading to degraded image quality and user experience disruptions when using disparity sensors for measurement.
Innovation Solution
The method involves displaying disparity patterns at strategic locations and times, such as during blinking, saccadic movements, or in blind spots, to minimize user experience disruption while measuring misalignment, using image-projection systems and eye-tracking technology to determine optimal presentation points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If disparity patterns are displayed continuously to measure misalignment, then measurement accuracy is improved, but user experience is disrupted
Solution Approach 1:
The system displays disparity patterns periodically at specific moments (during blinks, saccades, or at blind spots) rather than continuously. This periodic display achieves measurement goals while minimizing disruption to the user experience, as these are natural moments when the user's visual attention is momentarily redirected.
Solution Approach 2:
The system uses eye-tracking technology to predict and prepare for optimal display moments in advance. By detecting upcoming blinks, saccades, or blind spot positions, the system can preemptively display disparity patterns at the most favorable moments, ensuring measurement accuracy without disrupting the user's continuous viewing experience.
2Ease of operation
If disparity patterns are hidden in the UI to reduce disruption, then user experience is improved, but measurement timing is limited
Solution Approach 1:
The system dynamically determines the timing and location of disparity pattern display based on real-time eye-tracking data. Rather than using fixed UI locations or predetermined timing, the system adapts to the user's current eye state and movement, identifying optimal moments when disparity patterns can be displayed with minimal impact on user experience.
Solution Approach 2:
The system displays disparity patterns at specific localized regions (blind spots) rather than across the entire display. This localized approach ensures that the measurement function is performed in areas that do not interfere with the user's primary viewing areas, thereby maintaining both user experience and measurement capability.
3Ease of operation
If user content is used instead of disparity patterns to measure misalignment, then user experience is maintained, but measurement accuracy becomes unpredictable
Solution Approach 1:
The system uses an intermediary approach by displaying specially designed disparity patterns that are optimized for measurement purposes. These patterns serve as a mediator between the need for accurate measurement and the desire to maintain good user experience, providing reliable measurement data while being strategically displayed to minimize disruption.
Data Source
AI summary
A method for realigning components of image-projection systems for a head-wearable devices is described herein. The method includes, while an image is being presented to the user's first eye using a first image-projection system of a head-wearable device and the image is being presented to a user's second eye using a second image-projection system of the head-wearable device, selecting one or both of (i) a selected point in time at which to present a realignment pattern via the head-wearable device and (ii) a selected location within the image at which the realignment pattern should be presented. The method further includes, presenting, via the head-wearable device, the realignment pattern at one or both of the selected point in time and the selected location. The method further includes, modifying presentation characteristics for the first image-projection system or the second image-projection system based on the presenting of the realignment pattern.