Adjustable HMDD Lenses for Dynamic Vision Correction
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Solution Overview
Problem
Conventional head-mounted display devices (HMDDs) pose challenges for users with vision impairments, requiring labor-intensive and expensive prescription lenses for VR and AR experiences.
Innovation Solution
HMDDs with integrated or attachable adjustable lenses that dynamically adjust optical characteristics based on a user's visual acuity metric, using active media that respond to electrical or mechanical stimuli.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional HMDDs use fixed optical lenses, then the device structure is simple and cost-effective, but users with vision impairments cannot achieve proper vision correction
Solution Approach 1:
The patent applies dynamics by replacing fixed optical lenses with adjustable lenses that can dynamically change their optical characteristics. The adjustable lenses include an active medium that responds to electrical or mechanical stimuli to modify focal length and other optical properties, enabling the system to adapt to different users' vision requirements without requiring multiple fixed lenses or manual adjustments.
Solution Approach 2:
The patent changes the optical parameters of the lens system by using adjustable lenses with active media that can modify their physical properties in response to external stimuli. The processor device adjusts parameters such as focal length based on visual acuity metrics, transforming the optical system from a static configuration to a dynamically adjustable one that adapts to individual user needs.
2Ease of operation
If HMDDs use adjustable lenses with active media, then dynamic vision correction is achieved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent implements self-service by enabling the lens system to automatically adjust its optical characteristics based on visual acuity metrics determined by the processor device. The active medium in the adjustable lenses responds automatically to electrical or mechanical stimuli without requiring manual intervention from the user, making the vision correction process seamless and automated.
Solution Approach 2:
The patent replaces traditional mechanical lens adjustment mechanisms with an active medium-based system that responds to electrical or mechanical stimuli. This substitution eliminates the need for complex mechanical focusing mechanisms while achieving dynamic vision correction through the optical properties of the active medium, thereby reducing mechanical complexity.
3Measurement precision
If prescription lenses are provided for each user, then vision correction is accurate, but the process is labor-intensive and expensive
Solution Approach 1:
The patent applies preliminary action by determining visual acuity metrics and configuring the adjustable lenses' optical characteristics in advance before the user needs to use the HMDD. The system proactively measures and adjusts the lens parameters based on the user's visual needs, eliminating the need for time-consuming custom lens manufacturing and fitting processes.
Solution Approach 2:
The patent rapidly changes the optical parameters of the adjustable lenses based on determined visual acuity metrics. This dynamic parameter adjustment allows the system to quickly adapt to different users' vision requirements without the delays associated with custom lens manufacturing, thereby reducing the time loss while maintaining measurement precision.
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
Provides dynamic and adaptive vision correction, enhancing accessibility and reducing costs for users with vision impairments by eliminating the need for custom optical inserts, improving HMDD performance and resource efficiency.
Implementation Method 1
adjustable lenses that dynamically adjust optical characteristics based on a user's visual acuity metric, using active media that respond to electrical or mechanical stimuli
Data Source
AI summary
A head-mounted display device (HMDD) operable to provide extended-reality (XR) services is provided. The HMDD includes a display, adjustable lenses that include an active medium proximate the display, a memory, and a processor device coupled to the memory. The processor device is operable to determine a visual acuity metric associated with a user and, based on the visual acuity metric associated with the user, adjust an optical characteristic of the adjustable lenses, such as refractive index, lens curvature, and/or the like. In some examples, the adjustable lenses are electro-optical lenses comprising an active liquid crystal medium that is operable to adjust an optical characteristic associated therewith in response to applied electrical stimuli. In some examples, the adjustable lenses are opto-mechanical lenses comprising an active fluid medium within a flexible membrane that is operable to adjust an optical characteristic associated therewith in response to applied mechanical stimuli.