Head-Mounted Display Eye Alignment With Real-Time Registration Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing VR, AR, and MR technologies face challenges in ensuring proper registration between the display and the user's eyes, leading to degraded image quality, eye strain, and discomfort due to misalignment and anatomical variations.
Innovation Solution
A head-mounted display system that includes an inward-facing imaging system to determine the position of the user's eyes relative to the display registration volume, providing notifications and adjustments to ensure proper fit and mitigate misalignment, and dynamically adjusting image content to compensate for registration issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fixed display registration volume is used, then the device structure is simple, but image quality degrades due to anatomical variations among users
Solution Approach 1:
The patent implements dynamic adjustment of the display registration volume based on real-time eye position tracking. The system continuously monitors the user's eye location and adjusts the virtual image position to maintain proper registration, transforming a static fixed-volume approach into a dynamic adaptive system that responds to anatomical variations among users
Solution Approach 2:
The system employs feedback through eye position detection and uses this information to continuously adjust the virtual image positioning. The eye position tracker provides real-time feedback about the user's eye location, and the system responds by adjusting the display registration volume to maintain optimal image quality across different anatomical configurations
2Manufacturing precision
If the display registration volume is adjusted for each user, then image quality improves, but device complexity increases
Solution Approach 1:
The system performs self-adjustment by automatically tracking eye position and modifying the display registration volume without requiring manual intervention. The automated eye position tracking and dynamic volume adjustment eliminate the need for complex manual calibration procedures, reducing operational complexity while maintaining precise registration
Solution Approach 2:
The patent replaces complex mechanical adjustment mechanisms with an optical/electronic eye position tracking system. Instead of using physical adjustment components, the system uses sensors to detect eye position and electronically adjusts the virtual image positioning, simplifying the overall device architecture
3Measurement precision
If real-time eye position tracking is implemented, then registration accuracy improves, but energy consumption increases
Solution Approach 1:
The system implements periodic eye position tracking at optimized intervals rather than continuous tracking at maximum frequency. This approach maintains sufficient registration accuracy for user comfort while reducing energy consumption by allowing the tracking system to operate in periodic bursts rather than continuously at full power
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
Enhances image quality and user comfort by automatically correcting misalignment, reducing eye strain, and maintaining optimal display performance through real-time registration feedback and compensation.
Implementation Method 1
an inward-facing imaging system to determine a position of the eye
Data Source
Figure 1
Figure 2
Figure 3
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.