HMD Positioning Structure Pressure Distribution
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Solution Overview
Problem
Existing head-mounted display systems for virtual and augmented reality are uncomfortable due to clamping pressure on the face, difficult to adjust for varying head sizes, and are heavy and hard to clean, leading to usability limitations.
Innovation Solution
A positioning and stabilizing structure featuring a rear support hoop that contacts the occipital region, adjustable temporal connectors, and a forehead support connector made from flexible materials with adjustment mechanisms to distribute pressure evenly and securely hold the display unit, allowing for comfortable fit and easy adjustment across different head sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If straps or expandible rigid structures are used to hold the display unit, then the display unit can be maintained in operational position, but clamping pressure is exerted on the user's face causing discomfort
Solution Approach 1:
The positioning structure is divided into multiple independent components: a headband for circumferential support, temporal arms for lateral stabilization, and a forehead support for anterior positioning. This segmentation distributes the stabilizing function across multiple contact points, eliminating the need for concentrated clamping pressure on the face.
Solution Approach 2:
Different portions of the positioning structure have specialized functions optimized for their specific locations: the headband provides circumferential support, temporal arms provide lateral stability, and the forehead support provides anterior positioning. Each component is designed with local properties suited to its function, reducing overall pressure requirements.
2Stability of the object's composition
If fixed positioning structures are used, then the display unit can be held securely, but the system is difficult to adjust for wide application head sizes
Solution Approach 1:
The headband incorporates an expandible mechanism that allows it to dynamically adjust to different head circumferences. The temporal arms are positioned and dimensioned to accommodate variations in head width, enabling the structure to adapt to different head sizes while maintaining secure display unit holding.
3Strength
If heavy materials are used for the positioning structure, then structural integrity is maintained, but the system becomes difficult to clean and less comfortable
Solution Approach 1:
The headband and forehead support are constructed from flexible, lightweight materials that maintain sufficient structural integrity through their geometry and connection to the temporal arms. These flexible components are easier to clean and more comfortable than heavy rigid materials, while still providing the necessary positioning stability.
Data Source
AI summary
A head-mounted display system includes a head-mounted display unit and a positioning and stabilising structure structured and arranged to hold the head-mounted display unit in an operational position over a user's face in use. The positioning and stabilising structure includes a rear support structure adapted to contact posterior regions of a user's head and a forehead support connector, which includes a forehead support strap, which extends generally along and in the direction of the sagittal plane and connects the rear support structure to a superior edge region of the head-mounted display unit. The forehead support connector further includes a forehead support rigidiser that provides rigidification to a portion of the forehead support connector.