HMD Total Field of View Classification for Augmented Reality
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Solution Overview
Problem
See-through head-mounted displays (HMDs) face challenges in providing an augmented reality view without distracting the wearer, especially in mobile and outdoor scenarios, as virtual images can occlude the real-world view and draw attention away from the primary field of view.
Innovation Solution
Classifying the total field of view (TFOV) into various regions and determining the field of view (FOV) to strategically place virtual objects in unobtrusive areas, using sensor data from on-board and external sources to track the wearer's head and environment, allowing for dynamic or fixed region adjustments based on context.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If virtual images are displayed in the HMD wearer's field of view, then augmented reality information is provided to the wearer, but the virtual images occlude the real-world view and draw attention away from the primary field of view
Solution Approach 1:
The total field of view is segmented into multiple regions (primary region, secondary regions, tertiary regions) based on their importance and characteristics. Virtual objects are selectively placed in different regions depending on their urgency and relevance, with less important virtual objects placed in peripheral regions to minimize distraction from the primary field of view.
Solution Approach 2:
Different regions of the field of view are assigned different qualities and priorities. The primary region maintains high visibility for real-world viewing, while secondary and tertiary regions are used for displaying virtual information with varying levels of prominence, allowing information delivery without compromising the quality of the primary viewing experience.
2Loss of information
If virtual objects are placed in the primary field of view for maximum visibility, then information is delivered effectively, but the wearer's attention is drawn away from the real-world view
Solution Approach 1:
The system dynamically adjusts virtual object placement based on real-time conditions including wearer head position, detected environment, and context. Virtual objects can move between regions or change their display characteristics based on wearer behavior and situational context, optimizing both information delivery and wearer focus.
Solution Approach 2:
The system uses sensor data and environmental information to continuously monitor wearer state and adjusts virtual object placement accordingly. This feedback loop ensures that virtual information is delivered effectively while minimizing distraction, as the system responds to actual wearer behavior rather than using fixed placement rules.
3Loss of information
If the HMD provides comprehensive augmented reality information, then the wearer receives relevant context, but the virtual imagery becomes distracting and obtrusive in mobile and outdoor scenarios
Solution Approach 1:
The system changes multiple parameters including virtual object size, brightness, position, and display duration based on the detected environment and scenario. In mobile and outdoor scenarios, virtual objects may be displayed with reduced prominence, in specific regions, or for shorter durations to provide contextual information without causing distraction.
Data Source
AI summary
Virtual objects are located for display in a head-mounted display (HMD) to provide an augment reality view to an HMD wearer. An HMD wearer's total field of view (TFOV) is classified into two or more regions. Additionally, a field of view (FOV) for the HMD wearer is determined. The FOV is compared with the two or more regions of the HMD wearer's TFOV. Responsive to this comparison, virtual objects are determined for display based on a location of the FOV relative to the two or more regions of the HMD wearer's TFOV. The virtual objects may then be displayed by the HMD at an appropriate location.