HMD Visual Condition Compensation for Impaired Vision
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Solution Overview
Problem
Users with visual impairments face challenges interacting with virtual reality (VR) environments due to inaccurate responses to rendered images, and wearing optical glasses in head-mounted displays (HMDs) can disrupt the immersive experience and affect therapeutic tasks.
Innovation Solution
The system automatically adjusts rendered images or the optical lenses of the HMD to compensate for users' visual impairments, enhancing their VR experience and facilitating therapeutic applications by leveraging computer systems associated with the HMD to identify visual impairments and determine necessary adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If users with visual impairments wear optical glasses in head-mounted displays, then their visual impairment is compensated, but the immersive experience is disrupted and therapeutic task completion is affected
Solution Approach 1:
The patent extracts the optical correction function from external glasses and integrates it directly into the head-mounted display's optical path. The HMD incorporates adjustable optical elements (lenses or prisms) that can be positioned close to the user's eyes, eliminating the need for separate corrective glasses while maintaining visual clarity and immersion.
Solution Approach 2:
The patent merges the visual correction function with the HMD display system. The optical correction elements are integrated into the same optical path as the virtual reality display, combining two functions (correction and immersion) into a single unified system that eliminates the need for separate glasses.
2Reliability
If the HMD automatically adjusts rendered images or optical lenses, then visual impairment compensation is achieved, but device complexity increases
Solution Approach 1:
The HMD system performs self-diagnosis and self-adjustment for visual impairment compensation. The system automatically detects user visual needs (through input data or eye tracking) and autonomously adjusts the optical elements or rendered images without requiring manual intervention from therapists or users, reducing operational complexity despite increased internal system capabilities.
Solution Approach 2:
The patent utilizes adjustable optical parameters (lens curvature, focal length, refractive index) and rendering parameters (image resolution, focal point positioning) to compensate for visual impairments. By dynamically changing these parameters based on detected user needs, the system achieves visual correction through software-controlled optical adjustments rather than complex mechanical modifications.
3Measurement precision
If multiple sensors are used to capture patient movement data, then accuracy of motion capture is improved, but sensor placement complexity and potential for errors increase
Solution Approach 1:
The patent employs sensors with universal placement capabilities that can function at multiple body locations. The sensor system is designed to be interchangeable and adaptable to different anatomical positions, allowing a single sensor type to serve multiple measurement functions across different body parts, thereby reducing the need for specialized sensors for each location and simplifying the overall placement process.
Data Source
AI summary
A method for compensating for a visual impairment in a virtual reality environment, by multiple computer systems associated with a head mounted display, including, rendering an initial image for display in a virtual reality environment, determining a first visual adjustment to the HMD based on an input received by the HMD, the input being associated with a visual impairment of a user of the HMD, determining that the first visual adjustment does not satisfy a threshold measure of compensation for the visual impairment of the user, determining a second visual adjustment to the HMD, and rendering an adjusted image for display in the virtual reality environment based on the first visual adjustment and the second visual adjustment.