AR Display Wavefront Control for Neurological Perception Aids
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Solution Overview
Problem
Challenges exist in creating augmented reality (AR) technologies that provide a comfortable, natural-feeling, rich presentation of virtual image elements amidst real-world imagery, due to the complexity of the human visual perception system.
Innovation Solution
A head-mountable AR display system that outputs light with variable wavefront divergence, equipped with inwardly and outwardly-directed sensors, processors, and computer storage media, performs neurological analysis, detects environmental triggers, and provides perception aids based on user reactions to stimuli, including neurological conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If variable wavefront divergence is used to display virtual content, then user comfort and natural perception are improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic wavefront divergence control by adjusting the optical properties of the waveguide in real-time based on the virtual object's depth position. The wavefront divergence is continuously modified as objects move between depth planes, creating a dynamic optical system that adapts to changing display requirements. This dynamic adjustment enables variable focus distances without mechanical moving parts, improving user comfort while managing device complexity through intelligent optical control.
Solution Approach 2:
The system changes the wavefront divergence parameter of the optical waveguide to encode depth information. By modulating the divergence angle of light waves propagating through the waveguide, the system creates multiple focal planes corresponding to different virtual object distances. This parameter-based depth encoding allows the display to present rich 3D spatial information without adding mechanical complexity, resolving the contradiction between user comfort and device simplicity.
2Measurement precision
If neurological analysis and environmental trigger detection are implemented, then perception aid accuracy is improved, but processing requirements and device complexity increase
Solution Approach 1:
The AR display system integrates multiple functions into a unified platform: it displays virtual content, performs neurological analysis by monitoring user eye movements and reactions, detects environmental triggers through sensors, and provides adaptive perception aids. The waveguide and sensor array serve multiple purposes - displaying depth-encoded virtual objects while simultaneously tracking user gaze and detecting environmental conditions. This multi-functionality improves measurement precision without proportionally increasing device complexity.
Solution Approach 2:
The system implements continuous feedback loops where sensors monitor user neurological responses to displayed content, and the system automatically adjusts the presentation of virtual objects based on detected reactions. Environmental sensors provide feedback about external triggers, and the display adapts by modifying wavefront divergence or content presentation to provide appropriate perception aids. This feedback mechanism enhances accuracy by continuously optimizing the display based on real-time user and environmental data.
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
Enables the detection and potential modification of neurological conditions through continuous AR image content presentation, enhancing user comfort and natural interaction with virtual and real-world elements.
Implementation Method 1
a head-mountable, augmented reality display configured to output light with variable wavefront divergence to display virtual content
Data Source
AI summary
In some embodiments, a display system comprising a head-mountable, augmented reality display is configured to perform a neurological analysis and to provide a perception aid based on an environmental trigger associated with the neurological condition. Performing the neurological analysis may include determining a reaction to a stimulus by receiving data from the one or more inwardly-directed sensors; and identifying a neurological condition associated with the reaction. In some embodiments, the perception aid may include a reminder, an alert, or virtual content that changes a property, e.g. a color, of a real object. The augmented reality display may be configured to display virtual content by outputting light with variable wavefront divergence, and to provide an accommodation-vergence mismatch of less than 0.5 diopters, including less than 0.25 diopters.