HMD Strap Auto-Adjustment Using Pressure Sensor Feedback
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Solution Overview
Problem
Users face discomfort and distraction due to the need for frequent adjustment of head-mounted display (HMD) straps, especially when multiple users share the same device, as improper fitting leads to unbalanced weight distribution and loosening during use, disrupting the immersive experience.
Innovation Solution
Integration of pressure sensors and automatic adjustment mechanisms, such as motor rolling and inflatable straps, that adjust tension, position, or length of the straps based on user-specific data, including biometric recognition, to ensure a snug and comfortable fit, with the option for manual fine-tuning and periodic readjustment during use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual strap adjustment is used, then device complexity is reduced, but ease of operation deteriorates due to frequent adjustments needed
Solution Approach 1:
The HMD system automatically adjusts straps based on sensor feedback from pressure sensors and biometric data, eliminating the need for manual intervention. The system serves itself by continuously monitoring fit quality and making real-time adjustments to maintain optimal comfort and stability.
Solution Approach 2:
The system performs preliminary strap adjustment based on stored user profiles and biometric recognition before the user even puts on the device. This preliminary action ensures the straps are pre-configured to the correct tension and position, eliminating the need for post-putting adjustments.
2Ease of operation
If automatic adjustment mechanisms are integrated, then ease of operation improves, but device complexity increases
Solution Approach 1:
The adjustment mechanism serves multiple functions: it adjusts strap tension, positions straps correctly on the head, and adapts to different user profiles. The same motorized system handles both initial setup and ongoing adjustments, consolidating multiple functions into a single universal mechanism.
Solution Approach 2:
The patent combines pressure sensors, biometric recognition, motorized adjustment mechanisms, and control algorithms into an integrated system. Rather than separate components, these elements work together as a unified automatic adjustment system that reduces overall complexity through consolidation.
3Adaptability or versatility
If straps are made adjustable for multiple users, then adaptability improves, but ease of operation worsens due to adjustment burden
Solution Approach 1:
User profiles with optimal strap settings are pre-configured and stored in the system. When a user identifies themselves through biometric recognition, the system automatically retrieves and applies their pre-saved profile settings, eliminating the need for manual adjustment each time they use the device.
Solution Approach 2:
Pressure sensors provide continuous feedback on strap fit quality, allowing the system to detect when adjustments are needed and automatically make corrections. This closed-loop feedback system ensures optimal fit for each user without requiring their active participation in the adjustment process.
Data Source
AI summary
Embodiments are generally directed to automatic adjustment of head mounted display straps. An embodiment of a head mounted display apparatus includes a display unit; a strap harness including one or more straps; one or more pressure sensors; a microcontroller; and one or more automatic adjustment mechanisms for the one or more straps, wherein the microcontroller is to adjust the one or more straps by controlling operation of the one or more automatic adjustment mechanisms based at least in part on sensor data from the one or more pressure sensors.