Modular Head-Mounted Display for Interpupillary Distance Alignment
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Solution Overview
Problem
Augmented reality devices with see-through displays face accuracy issues due to varying eye and head sizes among users, leading to user discomfort when using a 'one-size fits most' approach.
Innovation Solution
A customized head-mounted display device with a modular frame assembly and see-through display sub-assembly, allowing for selection of differently-sized components to precisely fit each user's measurements, including interpupillary distance and facial features, for accurate alignment of virtual images with real objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a one-size fits most approach is used for assembling augmented reality devices, then manufacturing complexity is reduced and production efficiency is improved, but alignment precision between the display and user's eyes deteriorates
Solution Approach 1:
The head-mounted display device is divided into multiple modular components including a frame assembly, a see-through display sub-assembly, and adjustable mounting mechanisms. Each component can be independently selected and adjusted to match specific user measurements, enabling precise alignment while maintaining efficient assembly through modular construction.
Solution Approach 2:
The device incorporates adjustable mounting mechanisms that allow dynamic modification of component positions after assembly. The see-through display sub-assembly can be positioned at different locations on the frame assembly, and adjustment mechanisms enable fine-tuning to achieve precise eye alignment for each user.
2Manufacturing precision
If a customized approach with multiple component sizes is used, then alignment precision and user comfort are improved, but device complexity and assembly difficulty increase
Solution Approach 1:
The frame assembly is designed as a universal base structure that can accommodate multiple see-through display sub-assemblies of different sizes. The standardized mounting interface allows the same frame to work with various component configurations, reducing overall system complexity while enabling customization.
Solution Approach 2:
The device is segmented into independently selectable components including the frame assembly and see-through display sub-assembly, each available in multiple sizes. This segmentation allows users to select specific component sizes needed for precise alignment without requiring complete custom manufacturing of the entire device.
3Adaptability or versatility
If see-through display components are made adjustable to fit different users, then adaptability to individual users is improved, but assembly time and manufacturing cost increase
Solution Approach 1:
The adjustable mounting mechanisms are designed to allow quick modification of component positions during assembly. The see-through display sub-assembly can be rapidly positioned and secured at different locations on the frame assembly, enabling adaptation to different user measurements without significant time penalty.
Solution Approach 2:
The frame assembly is pre-configured with multiple predetermined mounting locations for the see-through display sub-assembly. This preliminary preparation allows assembly personnel to quickly select and install the appropriate component size without time-consuming measurements or adjustments during the assembly process.
Data Source
AI summary
A head-mounted display device includes a modular frame assembly including one or more different components. Each of the different components may be selected from a component set including at least two or more differently-sized versions of each different component. The head-mounted display device also includes a modular see-through display sub-assembly including one or more mountings for selectably coupling the modular see-through display sub-assembly to the modular frame assembly. The modular see-through display sub-assembly may be configured to couple to any combination of differently-sized versions of different components of the modular frame assembly.