Single Screen HMD with Flexible Shroud for IPD Adjustment
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Solution Overview
Problem
Conventional head-mounted display (HMD) systems with single screens and interpupillary distance (IPD) adjustment mechanisms are prone to contamination, which degrades image quality, and are often more expensive and mechanically complex compared to dual-screen systems.
Innovation Solution
A head-mounted display assembly featuring a single near-eye display screen with movable eyecups and a flexible shroud that provides a sealed environment, allowing for IPD adjustments while maintaining a clean screen and reducing mechanical complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a single display screen with movable eyecups and flexible shroud is used, then contamination is prevented and image quality is maintained, but the system requires a complex sealing mechanism
Solution Approach 1:
The patent employs a flexible shroud that forms a seal between the display screen and the movable eyecups. This flexible sealing mechanism allows the eyecups to move for IPD adjustment while maintaining a contamination-free environment around the single display screen, thus preventing harmful factors without requiring a complex rigid sealing structure.
2Device complexity
If a single display screen is used instead of dual screens, then mechanical complexity and cost are reduced, but IPD adjustment capability is lost without movable components
Solution Approach 1:
The patent makes the eyecups movable relative to the single display screen, enabling dynamic adjustment of the interpupillary distance. This dynamic configuration allows the system to adapt to different users' IPD requirements while maintaining the simplicity and cost-effectiveness of a single display screen architecture.
3Adaptability or versatility
If movable eyecups are implemented for IPD adjustment, then adaptability to different users is improved, but the risk of contamination increases
Solution Approach 1:
The flexible shroud creates a sealed environment that moves with the eyecups during IPD adjustment. This ensures that the display screen remains protected from contamination even as the eyecups change position, thus maintaining adaptability without increasing contamination risk.
4Object-affected harmful factors
If a flexible shroud is used to seal the single screen, then contamination is prevented, but manufacturing complexity increases
Solution Approach 1:
The flexible shroud is designed to be coupled to both the display screen and the movable eyecups, forming a seal that prevents contamination. While this adds some manufacturing complexity compared to a fixed structure, it eliminates the need for complex rigid sealing mechanisms and allows for easier assembly and adjustment.
Data Source
AI summary
The disclosed head-mounted display assemblies may include a first eyecup and a second eyecup that are configured for positioning in front of intended locations of a user's eyes. The first eyecup and the second eyecup may be movable relative to each other to adjust for an interpupillary distance of the user's eyes. The head-mounted display assemblies may also include a single near-eye display screen configured for displaying an image to the user through the first eyecup and the second eyecup. A flexible shroud may be positioned to provide a seal between a first interior volume of the first eyecup, a second interior volume of the second eyecup, and the single near-eye display screen. Various other methods, devices, systems, and assemblies are also disclosed.