Head Motion Induction Using Counter-Rotational Masses for VR Sickness

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Solution Overview

Problem

Consumers experience virtual motion sickness and an unsatisfactory user experience due to the lack of physical head movement corresponding to visual content's motion and acceleration effects, which current technologies fail to adequately address.

Innovation Solution

A head motion inducing device (HMID) that generates counter-rotational reactive forces using motor-driven rotational acceleration masses to simulate the motion and acceleration of visual content, synchronizing with the content's apparent motion and acceleration effects.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If visual content presents motion and acceleration effects, then the user experiences visual perception of motion, but the user does not experience corresponding physical head movement, causing virtual motion sickness

Engineering Contradiction:

Improveuser experience qualityVSAvoidvirtual motion sickness

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The device segments the head motion induction into multiple independent rotational acceleration masses (first and second masses) that can be controlled separately. Each mass corresponds to different axes of rotation, allowing independent control of head tilting in different directions to match the visual content's motion vectors

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system dynamically adjusts the rotational acceleration of masses based on real-time analysis of motion vectors from visual content. The controller continuously modifies the acceleration parameters of each mass to correspond to the changing motion and acceleration effects in the presented visual content

Inventive Principle:

Principle #15Dynamics

Solution Approach 3:

The device creates a physical copy of the motion experience by generating head tilts that mirror the motion vectors presented in visual content. The rotational acceleration masses produce physical head movements that replicate the acceleration effects seen in the visual content, creating a synchronized sensory experience

Inventive Principle:

Principle #26Copying

2Ease of operation

If rotational acceleration masses are used to induce head motion, then physical head movement is achieved, but device complexity increases

Engineering Contradiction:

Improvehead motion inductionVSAvoidmechanical structure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

Each rotational acceleration mass serves multiple functions: it generates rotational acceleration for head tilting, creates counterbalancing forces to reduce perceived weight, and can be independently controlled for different axes of motion. This multi-functionality reduces the need for separate mechanisms for each function

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The rotational acceleration masses act as counterweights that generate forces to tilt the head in desired directions. By positioning and accelerating these masses appropriately, the system creates the necessary torques for head motion while balancing the overall mechanical loads on the structure

Inventive Principle:

Principle #8Anti-weight (Counterweight)

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 HMID effectively reduces virtual motion sickness and enhances the user experience by physically simulating the motion and acceleration of visual content, providing a more immersive and comfortable viewing experience.

Implementation Method 1

A generated counter-rotational reactive force is exerted on a frame secured to the user's head to emulate at least one of an apparent movement and an apparent acceleration of an object shown in a visual content portion of presenting media content

Methodology Applied

Scientific EffectCounter-rotational reactive force: Reaction (physics)

Implementation Method 2

operates a first motor to drive a first rotational acceleration of a first rotational acceleration mass based on a determined first acceleration and operates a second motor to drive a second rotational acceleration of a second rotational acceleration mass based on a determined second acceleration

Methodology Applied

Scientific EffectRotational acceleration: Angular Momentum

Data Source

PatentUS12013978B1Apparatus and method for inducing head motion

Publication Date: 2024.06.18 RIGGLE DAVID

AI summary

A system and method for inducing head motion onto a frame that is secured to the head of a user is provided. A generated counter-rotational reactive force is exerted on the frame to emulate at least one of an apparent movement and an apparent acceleration of an object shown in a visual content portion of presenting media content. One embodiment concurrently operates a first motor to drive a first rotational acceleration of a first rotational acceleration mass based on a determined first acceleration and operates a second motor to drive a second rotational acceleration of a second rotational acceleration mass based on a determined second acceleration, wherein the rotational acceleration of the first rotational acceleration mass and the second rotational acceleration mass cooperatively induces a counter-rotational reactive force on the frame that urges the head of the user.