Head-Mounted Device Posture Control for Input Validation

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Solution Overview

Problem

Existing head-mounted displays struggle to differentiate between intended input signals and unintended inputs, such as impacts, when the device is not in use or is inverted, leading to potential unintended operations.

Innovation Solution

A head-mounted device with a mounted member, a detection device to detect the posture of the mounted member, a control device that switches control modes based on the detected posture, and output devices for image and sound, where the control device determines the validity of input signals related to control mode switching based on the detected posture.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the head-mounted display detects impacts or displacements to generate commands, then the device can respond to user inputs, but unintended operations occur when the device is placed in inverted posture

Engineering Contradiction:

Improveinput signal recognitionVSAvoidcommand execution accuracy

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The control device determines the posture of the head-mounted display before processing input signals. By checking whether the device is in a normal or inverted posture prior to command execution, the system prevents unintended operations from occurring when the device is placed upside down on surfaces

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The posture determination function acts as an intermediary between the impact/displacement detection and the command execution. This intermediate check validates whether the detected input should be processed, filtering out false inputs that occur when the device is in incorrect posture

Inventive Principle:

Principle #24Intermediary (Mediator)

2Speed

If the device processes all detected impacts as valid inputs, then response speed is improved, but false inputs from inverted placement cause unintended commands

Engineering Contradiction:

Improveresponse speedVSAvoidfalse input signals

Core Design Contradiction:

SpeedVSObject-affected harmful factors

Solution Approach 1:

The system performs posture determination before executing commands to quickly filter out invalid inputs from inverted placement, maintaining fast response for legitimate user inputs while preventing false command execution

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The posture determination result provides feedback to the command execution process, allowing the system to adjust its processing based on whether the device is in the correct orientation, thereby eliminating false inputs without slowing down valid input responses

Inventive Principle:

Principle #23Feedback

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 effectively prevents unintended operations by ensuring that input signals are only considered valid when the device is in its intended use posture, thereby maintaining proper functionality and user control.

Implementation Method 1

a detection device that detects a posture of the mounted member

Methodology Applied

Scientific EffectGravitation: Gravitation

Data Source

PatentUS12293012B2Head-mounted device, control method and control program for head-mounted device

Publication Date: 2025.05.06 SEIKO EPSON CORP

AI summary

A head-mounted device includes a mounted member that is mounted on a head of a user, a sensor unit, which is a detection device, that detects a posture of the mounted member, a control device that switches a control mode according to the posture detected in the sensor unit, and a video output device and an audio output device as output devices that perform output operations according to the control mode in the control device.