Head-Mounted Display Eye Registration Using Real-Time Fit Feedback
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Solution Overview
Problem
Challenges exist in producing virtual reality, augmented reality, and mixed reality technologies that provide a comfortable, natural-feeling presentation of virtual image elements amidst real-world imagery, with issues arising from improper registration between the display and the user's eyes, leading to degraded image quality and user discomfort.
Innovation Solution
A head-mounted display system equipped with eye-tracking cameras and processing electronics determines the position of the user's eye relative to a display registration volume, providing notifications and feedback to adjust the fit and mitigate misalignment, enhancing image quality by adjusting brightness and content presentation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a head-mounted display system is used to present virtual image content, then immersive virtual reality experience is achieved, but improper registration between the display and the user's eyes causes image degradation and user discomfort
Solution Approach 1:
The system employs eye-tracking cameras to continuously monitor the user's eye position and provides real-time feedback through processing electronics. This feedback mechanism detects when the eye position deviates from the optimal registration volume and triggers notifications or adjustments to restore proper alignment, thereby maintaining image quality and preventing user discomfort.
Solution Approach 2:
The patent replaces manual mechanical adjustment mechanisms with an automated optical-electronic system. Instead of requiring users to physically adjust the display position, the system uses eye-tracking cameras and processing electronics to automatically detect eye position and control display adjustments, eliminating the need for complex mechanical adjustment components.
2Measurement precision
If eye-tracking cameras and processing electronics are added to detect eye position, then display registration accuracy is improved, but device complexity increases
Solution Approach 1:
The eye-tracking cameras serve multiple functions: they detect eye position for registration accuracy, track user gaze for content presentation optimization, and provide data for comfort adjustments. This multi-functionality reduces the need for separate specialized components, thereby limiting the increase in overall device complexity while achieving high measurement precision.
3Manufacturing precision
If the display system provides notifications and feedback for registration adjustment, then image quality is maintained, but ease of operation decreases
Solution Approach 1:
The display system performs self-adjustment by automatically detecting eye position through eye-tracking cameras and controlling display registration based on detected parameters. The system serves itself by eliminating the need for manual user adjustment, thereby maintaining image quality without requiring user intervention. The notifications serve as informational feedback rather than requiring user action.
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AI summary
A wearable device may include a head-mounted display (HMD) for rendering a three-dimensional (3D) virtual object which appears to be located in an ambient environment of a user of the display. The relative positions of the HMD and one or more eyes of the user may not be in desired positions to receive, or register, image information outputted by the HMD. For example, the HMD-to-eye alignment vary for different users and may change over time (e.g., as a given user moves around or as the HMD slips or otherwise becomes displaced). The wearable device may determine a relative position or alignment between the HMD and the user's eyes. Based on the relative positions, the wearable device may determine if it is properly fitted to the user, may provide feedback on the quality of the fit to the user, and may take actions to reduce or minimize effects of any misalignment.