Head-Mounted Display Counterbalancing Airflow and Dial Adjustment

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Solution Overview

Problem

Existing head-mounted display systems for augmented reality are prone to clamping pressure on the user's face, discomfort due to localized stress points, and difficulty in adjusting to fit various head sizes, making them uncomfortable and less usable.

Innovation Solution

A head-mounted display system featuring a positioning and stabilising structure that includes a flow generator to create a counterbalancing airflow, an air guide arrangement to direct airflow between the flow generator and the display unit, and a dial adjustment mechanism to adjust the length of strap portions for a secure and comfortable fit.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If straps or expandable rigid structures are applied to the user's head under tension to maintain the display unit in its operational position, then the display unit is held securely, but clamping pressure is exerted on the user's face causing discomfort at localised stress points

Engineering Contradiction:

Improvedisplay unit positioning stabilityVSAvoidclamping pressure on user's face

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces a counterbalancing structure that extends from the display unit towards the user's occipital region, providing an opposing force to the forward weight of the display unit. This counterbalancing mechanism reduces the clamping pressure on the user's face by distributing the load across the head, thereby maintaining display unit stability while minimizing discomfort.

Inventive Principle:

Principle #8Anti-weight (Counterweight)

2Reliability

If straps or expandable rigid structures are used to hold the display unit, then the structure can maintain operational position, but it is difficult to adjust to allow wide application head sizes

Engineering Contradiction:

Improvedisplay unit positioningVSAvoidadjustability to different head sizes

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent incorporates adjustable and flexible components in the positioning and stabilizing structure, allowing the device to adapt to different head sizes and shapes. The structure includes movable and reconfigurable elements that enable dynamic adjustment, ensuring reliable display unit positioning across a wide range of user anatomies.

Inventive Principle:

Principle #15Dynamics

3Stability of the object's composition

If the display unit and associated positioning and stabilising structure are made heavy, then structural stability is improved, but comfort and usability are limited

Engineering Contradiction:

Improvepositioning structure stabilityVSAvoiduser comfort and usability

Core Design Contradiction:

Stability of the object's compositionVSEase of operation

Solution Approach 1:

The patent divides the positioning and stabilizing structure into multiple lightweight segments distributed across the head, rather than using a single heavy component. This segmentation allows the structure to achieve stability through distributed support points while minimizing the weight burden on any single area, thereby improving user comfort and usability.

Inventive Principle:

Principle #1Segmentation

4Device complexity

If straps are used to hold the display unit, then the structure can be simple, but it is difficult to clean

Engineering Contradiction:

Improvepositioning structure simplicityVSAvoidcleanability

Core Design Contradiction:

Device complexityVSEase of manufacture

Solution Approach 1:

The patent utilizes smooth, non-porous surface materials and streamlined strap designs that resist accumulation of dirt and debris. The flexible shell structures can be easily wiped clean, maintaining simplicity in design while significantly improving cleanability compared to traditional textured or porous materials.

Inventive Principle:

Principle #30Flexible shells and thin films

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 system provides improved comfort and usability by reducing clamping pressure, allowing for easy adjustments to fit different head sizes, and distributing the weight of the display unit more evenly across the user's head, enhancing the overall user experience.

Implementation Method 1

a flow generator configured to generate a flow of air and counter-balance a display unit

Methodology Applied

Scientific EffectAirflow generation: Fan

Implementation Method 2

an air guide arrangement configured to connect between the head-mounted display unit and the flow generator and direct airflow between the flow generator and the head-mounted display unit

Methodology Applied

Scientific EffectAirflow direction: Coanda Effect

Data Source

PatentUS12276803B2Positioning, stabilising and interfacing structures and system incorporating same

Publication Date: 2025.04.15 RESMED PTY LTD

AI summary

A head-mounted display system includes a head-mounted display unit a display that, in use, is held in an operational position over a user's face. The head-mounted display system further comprises a flow generator configured to generate a flow of air, and an air guide arrangement coupled to the flow generator to enable the flow generator to direct air to, or draw air from, one or more selected areas in proximity of the head-mounted display system.