Dual Optic Focal Vergence Control for See-Through Displays
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Solution Overview
Problem
Existing display systems face challenges in controlling the focal vergence of optical content independently of environmental content, leading to issues like physiological diplopia and image doubling, especially when content is displayed at different depths, which can hinder user interaction and perception.
Innovation Solution
The use of a system comprising a first optic and a second optic, along with a see-through display, allows for independent alteration of the focal vergence of both optical output and environment content, enabling the optical output content to appear at the same depth as the environment content, using adjustable optics and actuators controlled by a processor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the focal vergence of output content is altered to match environment content depth, then user perception and interaction are improved, but the display system complexity increases due to requiring multiple adjustable optics
Solution Approach 1:
The optical system is segmented into multiple independent components: a first optic for environment content, a second optic for output content, and a see-through display. This segmentation allows each component to be optimized and adjusted independently, enabling focal vergence control without requiring complete system redesign.
Solution Approach 2:
The adjustable optics are designed to handle multiple functions: they can alter focal vergence of both environment and output content, work with see-through displays, and accommodate different content depths. This multi-functionality reduces the need for separate specialized components.
2Object-affected harmful factors
If independent control of output and environment content focal vergence is implemented, then physiological diplopia is reduced, but the number of adjustable parameters and control mechanisms increases
Solution Approach 1:
The system employs adjustable optics that can dynamically change their focal vergence properties in response to different content depths and user needs. This dynamic adjustment capability allows the system to adapt to varying conditions without requiring multiple fixed optical paths.
Solution Approach 2:
The focal vergence parameter of the optics is made variable rather than fixed. By changing the focal vergence parameter of the first and second optics independently, the system can eliminate physiological diplopia while managing complexity through parameter control rather than structural complexity.
3Reliability
If fixed focal vergence is used in the display system, then the display functions properly, but the ability to match content depth with environment content is limited
Solution Approach 1:
The system transitions from static fixed focal vergence to dynamic adjustable focal vergence. The optics can be adjusted to maintain proper display function while adapting to different content depths and environmental conditions, achieving both reliability and adaptability.
Solution Approach 2:
The adjustable optics serve multiple purposes: they maintain the display's proper function while also enabling focal vergence matching with environment content. This multi-functionality allows the system to be both reliable in its core function and versatile in its adaptations.
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
This solution effectively addresses the issue of focal vergence mismatch by allowing independent control of both output and environment content, reducing physiological diplopia and ensuring that both types of content appear in focus at the same depth, thereby enhancing user interaction and perception.
Implementation Method 1
The first optic is adapted to alter the focal vergence of the optical environment content
Implementation Method 2
The second optic is adapted to alter the focal vergence of the optical environment content and to alter the focal vergence of the optical output content
Data Source
AI summary
A first optic receives optical environment content for delivery to the see-through display. The see-through display delivers output optical content to the second optic and delivers the optical environment content to the second optic. The second optic delivers the optical output content and optical environment content to a viewing position. The first optic alters the focal vergence of the optical environment content; the second optic alters the focal vergence of the optical environment content and the focal vergence of the optical output content. The focal vergences of the optical output content and optical environment content thus are independently controllable. The first and second optics may render the focal vergence of the optical environment content after first and second optics substantially equal to optical environment content unmodified by either the first or second optics. The focal vergences of optical environment content and output content may be equal after alteration.