HMD Facial Expression Control for Massage Chair Strength

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Solution Overview

Problem

Users wearing head-mounted display (HMD) devices struggle to adjust massage strength in massage chairs without a separate input device, as they cannot easily access external controls while wearing the HMD, leading to potential discomfort due to excessive massage strength.

Innovation Solution

The HMD device detects the user's grimace and adjusts the massage strength accordingly, transmitting commands to the massage chair to maintain a comfortable level, allowing for customized massage settings to be stored and reused.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the user wears an HMD device to relieve boredom during massage, then the user can enjoy visual content, but the user cannot easily access external input devices to adjust massage strength when it becomes too strong

Engineering Contradiction:
ImproveEntertainment capability during massageVSAvoidAbility to adjust massage strength
Core Design Contradiction:
Adaptability or versatilityVSEase of operation

Solution Approach 1:

The HMD device uses its own built-in sensors (camera, microphone, motion sensors) to detect user facial expressions and automatically control the massage chair, eliminating the need for external input devices. The system serves itself by using its inherent capabilities to solve the control problem.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The HMD device acts as an intermediary between the user and the massage chair control system. Instead of directly manipulating physical buttons, the user's facial expressions are captured by the HMD and converted into control commands that are transmitted to the massage chair.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Power

If the massage strength is increased to provide stronger massage effect, then the massage effectiveness is improved, but the user may feel pain and discomfort

Engineering Contradiction:
ImproveMassage strengthVSAvoidUser discomfort and pain
Core Design Contradiction:
PowerVSObject-affected harmful factors

Solution Approach 1:

The HMD device continuously monitors the user's facial expressions through cameras and microphones during the massage session. When pain or discomfort is detected through facial grimacing or verbal cues, the system automatically adjusts the massage strength downward, creating a closed-loop feedback system that prevents harmful effects.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The massage strength is made dynamic rather than static. The system continuously adapts the massage power level based on real-time detection of user facial expressions, allowing the massage strength to change during the session to match user comfort levels.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS10698213B2Head mounted display device
Publication Date: 2020.06.30 LG ELECTRONICS INC
  • US10698213B2 patent drawing
  • US10698213B2 patent drawing
  • US10698213B2 patent drawing

AI summary

A head mounted display (HMD) device including a display configured to display an image; a communication processor configured to communicate with a massage chair; a sensor configured to acquire data about a facial expression of a user receiving a massage in the massage chair; and a controller configured to transmit a command to the massage chair for adjusting a massage strength of the massage based on the facial expression of the user.