HMD Eye Registration Feedback for Accurate Display Fit
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Solution Overview
Problem
Challenges exist in producing virtual reality, augmented reality, and mixed reality technologies that facilitate a comfortable, natural-feeling presentation of virtual image elements amidst other imagery, particularly due to issues with proper registration and fit of head-mounted displays on users.
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 the display registration volume, providing notifications and feedback for adjustments, and optionally adjusting the fit using interchangeable components to ensure proper registration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If head-mounted display systems are designed with fixed geometry, then manufacturing is simplified, but user fit and registration quality vary due to anatomical differences
Solution Approach 1:
The head-mounted display system is divided into modular components including interchangeable fit pieces (nose pads, head straps, temple pieces) that can be independently selected and adjusted. This segmentation allows the system to accommodate different user anatomies while maintaining manufacturing simplicity through standardized modules.
Solution Approach 2:
The system enables parameter changes in the physical geometry of the display device by allowing users to interchange fit pieces with different dimensions and properties. This changes the physical parameters (nose bridge distance, head circumference, temple length) to match individual user anatomy, improving registration quality without requiring custom-manufactured devices.
2Manufacturing precision
If interchangeable fit pieces are added to adjust user fit, then registration quality improves, but device complexity increases
Solution Approach 1:
The interchangeable fit pieces are designed as universal components that can be used across different display device models. Each fit piece serves multiple functions: it provides structural support, enables anatomical adjustment, and maintains optical alignment. This multi-functionality reduces overall system complexity despite adding adjustability.
Solution Approach 2:
Instead of manufacturing custom-fit devices for each user, the system uses standardized fit piece templates that can be copied and interchanged. Users select from pre-designed options that replicate different anatomical configurations, avoiding the complexity of custom manufacturing while achieving personalized fit.
3Adaptability or versatility
If manual adjustment of fit pieces is required, then user customization is enabled, but user comfort and ease of use decrease
Solution Approach 1:
The system enables users to self-adjust their own fit by providing intuitive interfaces and clear guidance for selecting and installing appropriate fit pieces. The interchangeable components are designed for user-friendly manipulation, allowing customers to customize their fit independently without requiring technical expertise or professional assistance.
Solution Approach 2:
The display system incorporates eye-tracking and registration monitoring that provides feedback to users about their current fit quality. This feedback mechanism guides users in selecting appropriate fit pieces by showing real-time information about eye position relative to the display, making the adjustment process more intuitive and comfortable.
Data Source
AI summary
A display system may include a head-mounted display (HMD) for rendering a three-dimensional virtual object which appears to be located in an ambient environment of a user of the display. One or more eyes of the user may not be in desired positions, relative to the HMD, to receive, or register, image information outputted by the HMD and/or to view an external environment. For example, the HMD-to-eye alignment may vary for different users and/or may change over time (e.g., as the HMD is displaced). The display system 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/or may take actions to reduce or minimize effects of any misalignment.