AR Headset Convergence Adjustment for Virtual Depth Comfort
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Solution Overview
Problem
Conventional augmented reality systems cause sensory conflicts due to vergence-accommodation conflicts, leading to blurring, double images, discomfort, fatigue, and nausea when displaying virtual objects that change depth.
Innovation Solution
An augmented reality headset adjusts the display of virtual objects based on interpupillary distance and convergence vectors, dynamically shifting the objects to align with the user's gaze and focus points, reducing vergence-accommodation conflicts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If virtual objects are displayed at changing virtual depths in conventional augmented reality systems, then the visual depth perception is improved, but vergence-accommodation conflicts occur causing blurring, double images, discomfort, fatigue, and nausea
Solution Approach 1:
The system dynamically adjusts the convergence of gaze lines based on virtual depth. As virtual objects move to different depths, the convergence of the displayed image is dynamically modified to match the vergence required by the pupil tracking sensor, allowing depth perception without sensory conflicts
Solution Approach 2:
The pupil tracking sensor provides feedback on the user's actual pupil position and vergence state. This feedback is used by the convergence adjustment system to real-time adjust the gaze line convergence, creating a closed-loop system that prevents vergence-accommodation conflicts
2Reliability
If the display adjusts virtual objects based on interpupillary distance and convergence vectors, then user comfort and visual accuracy are improved, but system complexity increases due to pupil tracking sensors and convergence adjustment mechanisms
Solution Approach 1:
The pupil tracking sensor serves multiple functions: it tracks pupil position for gaze detection, determines interpupillary distance, and provides feedback for convergence adjustment. This multi-functionality reduces the need for separate sensors and simplifies the overall system architecture
Solution Approach 2:
The system uses the user's own pupil movements and vergence patterns as the basis for adjustment. By leveraging the natural physiological responses of the user's visual system, the system automatically adapts without requiring external calibration equipment or additional sensors
Data Source
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AI summary
Systems and methods are disclosed that dynamically and laterally shift each virtual object displayed by an augmented reality headset by a respective distance as the respective virtual object is displayed to change virtual depth from a first virtual depth to a second virtual depth. The respective distance may be determined based on a lateral distance between a first convergence vector of a users eye with the respective virtual object at the first virtual depth and a second convergence vector of the user´s eye with the respective virtual object at the second virtual depth along the display, and may be based on an interpupillary distance. In this manner, display of the virtual object may be adjusted such that the gazes of the user's eyes may converge where the virtual object appears to be.