Eye Glint Imaging for Convergence Distance Control
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Solution Overview
Problem
Current head-worn display systems face challenges in optimizing user experience by effectively presenting content in see-through displays, particularly in transitioning between augmented and virtual reality modes, with issues related to convergence distance and positioning of digital content within the field of view.
Innovation Solution
A head-worn display system that includes a processor to present digital content only in a portion of the field of view, with adjustable convergence distance and position based on the type of content or user interaction, using an eye imaging system to measure convergence and adjust the position of digital content within blank areas of the field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If digital content is presented only in a portion of the field of view, then convergence distance control is improved, but the field of view area is reduced
Solution Approach 1:
The field of view is segmented into multiple regions: a central presentation area for digital content and peripheral blank areas. This segmentation allows precise control of convergence distance for displayed content while preserving the option to expand into blank areas when needed, resolving the contradiction between convergence control precision and overall field of view area.
Solution Approach 2:
The system dynamically adjusts content positioning between the central presentation area and blank areas based on convergence distance requirements. When precise convergence control is needed, content is positioned in the central area; when field of view expansion is prioritized, content can be shifted to blank areas, making the field of view area dynamically adaptable.
2Measurement precision
If digital content position is adjusted in blank areas, then convergence distance adjustment is improved, but content presentation flexibility is reduced
Solution Approach 1:
The system provides dynamic content positioning capabilities that allow flexible adjustment between central and peripheral areas based on real-time convergence distance requirements. This dynamic adaptability resolves the contradiction by enabling precise convergence control when needed while maintaining overall presentation flexibility through programmable positioning options.
Solution Approach 2:
The system changes the positional parameters of digital content within the field of view based on convergence distance measurements. By adjusting content position as a variable parameter, the system achieves precise convergence control while maintaining flexibility through programmable positioning logic that can adapt to different content types and user preferences.
3Ease of operation
If convergence distance is adjusted for different content types, then user experience is improved, but system complexity increases
Solution Approach 1:
The system automatically adjusts convergence distance parameters based on content type classification. By programmatically changing convergence parameters according to predefined content categories, the system improves user experience through adaptive optimization while managing complexity through automated classification and parameter adjustment algorithms.
Solution Approach 2:
The system uses eye imaging to measure user convergence and provides feedback for automatic adjustment of content positioning. This feedback mechanism enables the system to adapt to individual user characteristics and preferences, improving user experience while managing complexity through closed-loop control that automatically optimizes parameters based on measured convergence 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
Enhances user experience by allowing precise control over the positioning and distance of digital content, improving immersion and interaction with both augmented and virtual reality environments.
Implementation Method 1
The eye imaging system may be used to image a position of the user's eye... The eye imaging system images a front perspective of the user's eye
Data Source
AI summary
Disclosure herein concerns a method that includes illuminating a user's eye with an illumination source in a head-worn display, capturing an image of the user's eye with an eye camera in the head-worn display, wherein the image includes an eye glint produced by light from the illumination source that is reflected from a surface of the user's eye, determining a size of an eye glint in the captured image, and identifying a change in focus distance for the user's eye in correspondence with a change in the size of the eye glint.