Mixed Gaze Tracking for Hands-Free Head-Locked UI Selection

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Solution Overview

Problem

Wearable devices lack a mechanism for hands-free, non-disruptive user interface interaction without the need for accessory devices, limiting intuitive and reliable interaction with UI elements.

Innovation Solution

A system that processes head movements and eye-gaze characteristics to generate gestures for interacting with UI elements, utilizing a sectored UI design and head-locked visual interface, reducing the need for physical peripherals.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If traditional peripheral devices are used for UI interaction, then interaction reliability is improved, but ease of operation deteriorates due to disruption and lack of hands-free capability

Engineering Contradiction:

Improvehands-free operationVSAvoidinteraction reliability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent replaces mechanical peripheral devices (mouse, keyboard, touch interface) with an optical-based eye-tracking system that uses gaze detection and head movement sensing to interact with the UI, enabling hands-free operation while maintaining interaction reliability through natural intuitive controls

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system uses the user's own physiological signals (eye movements and head movements) as the input mechanism, eliminating the need for external peripheral devices and providing a self-contained hands-free interaction solution

Inventive Principle:

Principle #25Self-service

2Ease of operation

If eye-tracking only is used for gesture detection, then ease of operation is improved, but measurement precision deteriorates due to head movement interference

Engineering Contradiction:

Improveintuitive interactionVSAvoidgaze detection accuracy

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The patent combines eye-tracking data with head movement sensing data to create a unified gesture detection system, where the correlation between these two data sources enables accurate distinction between intentional gaze-based gestures and unintentional head movement interference

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The system uses feedback from the correlation analysis between eye movements and head movements to dynamically adjust gesture detection thresholds and parameters, improving measurement precision by learning from the relationship between these physiological signals

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12517627B2Wearable device mixed gaze tracking

Publication Date: 2026.01.06 GOOGLE LLC

AI summary

A method including determining an eye-gaze characteristic of a user of a wearable device, determining a head movement of the user, determining a gesture based on the eye-gaze characteristic, the head movement, and a correlation between the eye-gaze characteristic and the head movement, selecting a user interface (UI) element of a head-locked UI operating on the wearable device based on the gesture, and triggering a UI operation based on the selected UI element.