Artificial Reality Optical Control for Eye Fatigue Reduction
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Solution Overview
Problem
Artificial reality systems impact users' eyes, causing issues like eye fatigue, vision fidelity problems, and potential eye biology concerns due to uncontrolled optical parameters.
Innovation Solution
The system uses a light coordinator and an eye model to control optical parameters at a user's eye by adjusting light characteristics based on tracked user conditions, including eye positioning and temporal conditions, to create a personalized and varied visual experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If artificial reality systems display objects in immersive environments, then users experience virtual reality or augmented reality, but eye fatigue and vision fidelity problems occur due to uncontrolled optical parameters
Solution Approach 1:
The system dynamically changes optical parameters (focal length, aperture, illumination) based on tracked eye conditions and temporal factors to prevent eye fatigue while maintaining immersive experience. The light coordinator adjusts these parameters in real-time according to eye tracking data and circadian rhythm considerations.
Solution Approach 2:
The system implements a feedback loop where eye tracking data continuously monitors user eye conditions, and this information feeds back to the light coordinator which adjusts optical parameters accordingly. This closed-loop control prevents eye fatigue by responding to actual eye state rather than using fixed parameters.
2Device complexity
If artificial reality systems use fixed optical parameters, then device complexity is reduced, but vision fidelity and eye biology concerns worsen
Solution Approach 1:
The optical system transitions from static fixed parameters to dynamic adjustable parameters. The light coordinator modifies focal length, aperture, and illumination levels in real-time based on eye tracking and temporal conditions, allowing the system to adapt to changing eye states while maintaining manageable complexity through automated control.
3Object-affected harmful factors
If optical parameters are dynamically adjusted based on eye tracking, then eye fatigue is reduced, but device complexity and automation requirements increase
Solution Approach 1:
The light coordinator performs multiple functions: it controls illumination levels, adjusts focal parameters, manages aperture settings, and coordinates with eye tracking systems. By consolidating these diverse optical control functions into a single multi-functional component, the system reduces overall complexity while achieving comprehensive eye fatigue prevention.
4Object-affected harmful factors
If light characteristics are controlled based on temporal conditions, then circadian rhythm disruption is minimized, but energy consumption and control complexity increase
Solution Approach 1:
The system implements periodic adjustments to light characteristics that align with circadian rhythm cycles. By scheduling illumination changes according to temporal patterns (day/night cycles, meal times, activity periods), the system minimizes circadian disruption while optimizing energy consumption through predictable, rhythm-based control rather than continuous adjustment.
Data Source
AI summary
Aspects of the present disclosure are directed to controlling optical parameters at a user's eye using an artificial reality system and tracked user conditions. For example, based on tracked user eye positioning, implementations can adjust the light that enters the user's eye to control an image shell generated at the user's eye. An image shell refers to the way light, that enters the eye, focuses on the retina of the eye. Example properties of an image shell include image shell centration, image shell curvature, image shell shape, etc. A user may focus on an object in an artificial reality environment (e.g., real-world object or virtual object) and light from the object can generate an image shell at the user's eyes. The image shell at the user's eyes can impact the user's vision and/or eye biology.