Flexible Membrane Sealing for Movable VR Optics
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Solution Overview
Problem
Virtual reality (VR) display devices face challenges in sealing their interior spaces from foreign objects and materials while allowing movable optics modules to adjust interpupillary distance (IPD) without impeding their movement.
Innovation Solution
A membrane assembly featuring a flexible membrane with deviating surface features that deform to accommodate the movement of optics modules, ensuring a secure seal around lenses and allowing for adjustable IPD without restricting module movement, combined with rigid bezels for attachment to the frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing member surrounds the lenses to seal the interior of the VR display device, then protection from foreign objects and materials is improved, but movement of the optics modules for IPD adjustment is impeded
Solution Approach 1:
The patent employs a flexible membrane as the sealing member that can deform and flex to accommodate the movement of optics modules during IPD adjustment. This flexible membrane maintains the seal integrity while allowing the necessary mechanical movement, resolving the contradiction between sealing effectiveness and ease of operation.
Solution Approach 2:
The sealing member is designed with dynamic characteristics, allowing it to adapt its shape and position as the optics modules move. This dynamic design enables the membrane to maintain contact and sealing effectiveness throughout the range of motion required for IPD adjustment.
2Object-affected harmful factors
If the interior space is sealed to prevent contamination, then protection from foreign objects is improved, but adjustability of interpupillary distance is restricted
Solution Approach 1:
The flexible membrane provides continuous sealing over the moving optics modules, ensuring that the interior space remains protected from contamination while the modules move to different positions for IPD adjustment. The membrane's flexibility allows it to conform to the changing geometry during adjustment.
Solution Approach 2:
The flexible membrane acts as an intermediary element between the stationary sealed interior and the moving optics modules. It transmits the movement of the modules while maintaining the seal, allowing IPD adjustability without compromising contamination protection.
3Reliability
If a rigid sealing structure is used to seal around movable lenses, then sealing reliability is improved, but device complexity increases due to additional mechanisms required
Solution Approach 1:
The flexible membrane eliminates the need for complex rigid sealing mechanisms with multiple moving parts. By using a single flexible element that naturally conforms to the moving lenses, the design achieves reliable sealing with minimal complexity.
Solution Approach 2:
The flexible membrane is self-adjusting and requires no additional actuators or control mechanisms. It automatically adapts to the position of the optics modules through its inherent flexibility, providing sealing functionality without adding device complexity.
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
Effectively seals the interior of VR display devices from foreign contaminants while enabling seamless adjustment of IPD, ensuring optimal performance and user comfort by preventing damage and maintaining a secure fit during lens adjustments.
Implementation Method 1
An inner surface of the flexible membrane includes surface deviations configured to deform when the optics modules move, thereby allowing the flexible membrane to deform, without impeding movement of the optics modules, while sealing the interior of the head-mounted display device.
Data Source
AI summary
Aspects of the present disclosure are directed to a membrane assembly including a flexible membrane that seals an interior of a head-mounted display device from foreign objects and foreign materials. The head-mounted display device can be a virtual reality (VR) head-mounted display device. The membrane assembly can include a flexible membrane and bezels attached to the flexible membrane, and configured to be attached to a frame and optics modules of the head-mounted display device. The flexible membrane is configured to extend around lenses respectively mounted in the optics modules. The optics modules can be configured to move in the frame to change and interpupillary distance (IPD) of the lenses. An inner surface of the flexible membrane includes surface deviations configured to deform when the optics modules move, thereby allowing the flexible membrane to deform, without impeding movement of the optics modules, while sealing the interior of the head-mounted display device.