Facial Interface Sensors for Stable Physiological Sensing in HMDs
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Solution Overview
Problem
Head-mounted displays often obstruct facial features, hindering the observation of physiological information and influencing physiological conditions, which can be valuable for delivering tailored graphical content.
Innovation Solution
Incorporating a facial interface with physiological sensors that engage the face to sense conditions, allowing for removable attachment to the display unit, and integrating these sensors with the display system to make determinations based on both facial and non-facial physiological data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a facial interface is used to support the display unit on the face, then the display is stabilized and supported, but physiological information on the face is obscured and physiological conditions are influenced
Solution Approach 1:
The patent combines the facial interface structure with integrated physiological sensors that can detect physiological conditions through or beneath the interface material. This merging allows the interface to simultaneously provide structural support and enable physiological sensing without requiring separate components.
Solution Approach 2:
The facial interface material acts as an intermediary that allows physiological sensing while providing structural support. The material is designed to be sufficiently transparent or conductive to enable sensor detection of physiological conditions while maintaining its mechanical function of supporting the display unit.
2Ease of operation
If the facial interface is made of compliant material to conform to the face, then comfort and fit are improved, but sensor observation of facial features is hindered
Solution Approach 1:
The patent replaces optical observation mechanisms with physiological sensors that can detect physiological conditions through the compliant material. Instead of requiring visual access to facial features, the system uses sensors embedded in or attached to the interface material to measure physiological parameters directly.
Solution Approach 2:
The facial interface is constructed from flexible, thin compliant material that allows sensor signals to pass through while maintaining comfort and conformability. The thin film structure enables physiological sensing without compromising the mechanical compliance needed for user comfort.
3Stability of the object's composition
If the facial interface is fixed to provide stable support, then display stability is improved, but adaptability to different users is reduced
Solution Approach 1:
The facial interface is designed with dynamic, adjustable characteristics that allow it to adapt to different facial geometries while maintaining stable support. The interface can be adjusted or reconfigured to provide optimal fit and stability for different users, transforming from a static to a dynamic system.
Solution Approach 2:
The patent employs facial interfaces with adjustable parameters such as material properties, geometric configuration, or sensor placement that can be modified to suit different users. By changing these parameters, the same interface design can adapt to various facial shapes and sizes while maintaining stable display support.
Data Source
AI summary
A head-mounted display includes a display unit and a facial interface. The display unit displays graphical content to the user. The facial interface is removably coupleable to the display unit and engages a facial engagement region of a face of the user whereby the display unit is supported on the face of the user. The facial interface includes a physiological sensor for sensing a physiological condition of the user in the facial engagement region.