HMD Interfacing Structure with Varying Compliance for Light Leakage
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Solution Overview
Problem
Existing head-mounted display systems face challenges with uncomfortable fit, light leakage, and difficulty in adjusting to various head sizes due to inadequate interfacing and positioning structures, leading to reduced usability and comfort, especially during prolonged use.
Innovation Solution
A positioning and stabilising structure with a rear support hoop and adjustable connectors, including resilient and rigid components, that contacts the posterior and anterior regions of the head, allowing for angular and lateral adjustments to secure the display unit effectively, while an interfacing structure with varying compliance and adjustable face engaging portions ensures a comfortable and secure seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a rigid interfacing structure is used to seal against the user's face, then light leakage is reduced, but user comfort deteriorates due to pressure on facial features
Solution Approach 1:
The interfacing structure uses a flexible cushion made of compliant material that can deform to conform to the user's facial features. This flexible membrane seals against the face while distributing pressure, preventing light leakage without causing discomfort from rigid pressure points.
Solution Approach 2:
The cushion is designed with varying local compliance - softer regions for areas requiring comfort (nose, cheeks) and firmer regions for structural support. This variation in material parameters allows the single component to simultaneously achieve sealing and comfort.
2Object-affected harmful factors
If additional force is applied to achieve sealing with the interfacing structure, then light leakage is reduced, but user comfort deteriorates
Solution Approach 1:
The flexible cushion inherently conforms to facial contours through its compliance, achieving effective sealing without requiring excessive clamping force. The material's ability to deform allows it to adapt to the user's face shape, creating a light-tight seal at lower pressure levels.
Solution Approach 2:
The cushion dynamically adapts to the user's facial features and movements, maintaining sealing effectiveness throughout use. This dynamic compliance allows the interface to self-adjust rather than requiring fixed high force application.
3Stability of the object's composition
If the positioning and stabilising structure is made heavy to maintain display unit position, then stability is improved, but user comfort deteriorates
Solution Approach 1:
The positioning structure uses elastic bands that provide counterbalancing forces to support the display unit weight. Rather than relying on heavy rigid structures, the elastic elements create tension-based support that offsets the display weight, distributing the load to the user's head and face in a controlled manner.
Solution Approach 2:
The positioning structure incorporates flexible elastic bands instead of rigid heavy components. These flexible elements provide the necessary stabilizing force while being lightweight and compliant, improving comfort compared to rigid heavy alternatives.
4Object-affected harmful factors
If the interfacing structure is designed for a specific head size, then sealing effectiveness is improved, but adaptability to different head sizes deteriorates
Solution Approach 1:
The flexible cushion can stretch and deform to accommodate different head sizes and facial geometries. This compliance allows the same interfacing structure to effectively seal against various users without requiring size-specific customization, maintaining light leakage prevention across different head dimensions.
Solution Approach 2:
The interfacing structure is designed as a universal component that serves multiple users with different head sizes. The adjustable positioning structure combined with the compliant cushion creates a one-size-fits-all solution that adapts to individual users rather than requiring multiple size-specific components.
5Stability of the object's composition
If the positioning structure components are made rigid for structural support, then display unit positioning is improved, but adjustability to different head sizes deteriorates
Solution Approach 1:
The positioning structure uses adjustable components including elastic bands with varying tension and movable connection points. This dynamic design allows the structure to be configured for different head sizes while maintaining stable display positioning, transitioning between rigid support and flexible adjustment as needed.
Solution Approach 2:
The positioning structure is divided into separate adjustable components (elastic bands, connectors, positioning elements) that can be independently adjusted. This segmentation allows each component to be optimized for both structural support and adaptability, with the ability to modify the configuration for different users.
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
The solution provides a comfortable, secure, and adjustable fit for head-mounted displays, minimizing light leakage and accommodating different head sizes, thereby enhancing the usability and immersion experience in virtual reality applications.
Implementation Method 1
a resilient component (34) arranged, in use, to deform
Data Source
AI summary
A head-mounted display system includes a positioning and stabilising structure structured and arranged to hold a display unit in an operational position over a user's face in use and an interfacing structure for the display unit constructed and arranged to be in opposing relation with the user's face. The interfacing structure comprises a substantially continuous face engaging surface adapted to contact the user's face around a periphery of the user's eyes. The interfacing structure comprises silicone. The interfacing structure is configured and arranged such that force applied to the user's face is distributed around the periphery thereof. The interfacing structure comprises a first compliance at a first region and a second compliance at a second region, wherein the first region and the second region are configured around the periphery of the interfacing structure to allow selective distribution of the force onto the user's face.