# US 12,649,042 B2 · Head-mounted device for reducing symptoms of cybersickness

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- Number: US 12,649,042 B2
- Document ID: US12649042B2
- Status: Granted
- Kind: B2
- Application number: 17/857,559
- Filed: 2022-07-05
- Published: 2023-10-05
- Granted: 2026-06-09
- Earliest claimed: 2022-03-16
- Assignees: National Tsing Hua University
- Applicants: National Tsing Hua University
- Inventors: Yun-Ju Lee; Yu-Jung Chen
- Web page: https://patentgrep.com/patent/US12649042B2

## CPC

- A61M 21/00: Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis
- A61M 2021/0022: {by the tactile sense, e.g. vibrations}
- A61M 2205/507: Head Mounted Displays [HMD]
- A61M 2209/088: on the body
- A61M 2210/06: Head
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}

## Abstract

A head-mounted device for reducing symptoms of cybersickness includes a main shell, and a stimulation unit. The main shell includes first, second and third tube bodies that are arc-shaped and that are worn respectively on the top and back of the user's head and the user's ear. The stimulation unit includes first, second and third components that are received respectively in the first, second and third tube bodies, that are movable in a rolling, sliding or flowing manner with low friction, and that are configured to generate and transmit a stimulation force, through one end of the respective one of the first, second and third tube bodies, to the use's vestibular system in respond to movement of the user's head.

## Claims

### Claim 1

A head-mounted device for reducing symptoms of cybersickness, adapted to be worn on a user's head and to be used cooperatively with a head-mounted display for stimulating a vestibular perception of a vestibular system of the user, said head-mounted device comprising:
a main shell adapted to be mounted on the user's head, and including a first tube body, a second tube body and a third tube body that are adapted to be respectively disposed at the top of the user's head, the back of the user's head and one of the user's ears, said first, second and third tube bodies being arc-shaped, having arc-shaped central axes which respectively define imaginary first, second and third planes, and being fixedly connected to one another in a manner that the first, second and third planes are perpendicular to one another, each of said first, second and third tube bodies having opposite closed ends, for each of said first and second tube bodies, each of said closed ends being adapted to be disposed proximal to a respective one of the user's ears; and
a stimulation unit including a first component, a second component and a third component, each of said first, second and third components being received in a respective one of said first, second and third tube bodies, and being configured to be movable in at least one of rolling, sliding and flowing manners in the respective one of said first, second and third tube bodies;
wherein when rotation of the user's head drives at least one of said first, second and third components of said stimulation unit to move in the respective one of said first, second and third tube bodies, said at least one of said first, second and third components is adapted to generate and transmit a stimulation force, through one of said closed ends of the respective one of said first, second and third tube bodies, to the vestibular system of the user for stimulating the vestibular perception of the user;
wherein each of said at least one of said first, second and third components is composed of a rigid body or a fluid;
wherein when each of said at least one of said first, second and third components is composed of the rigid body, the stimulation force is proportional to an angular acceleration of the user's head, a total mass of the rigid body, and a radius of curvature of the respective one of said first, second and third tube bodies; and
wherein when each of said at least one of said first, second and third components is composed of the fluid, the stimulation force is proportional to the angular acceleration of the user's head, the radius of curvature of the respective one of said first, second and third tube bodies, an inner cross-sectional area of the respective one of said first, second and third tube bodies, and a density of the fluid.

### Claim 2 (depends on 1)

The head-mounted device as claimed in claim 1, wherein each of said first, second and third tube bodies is semicircular, and has a circular inner cross section.

### Claim 3 (depends on 1)

The head-mounted device as claimed in claim 1, wherein the first, second and third planes are adapted to be parallel, in terms of anatomy, to the coronal, horizontal and sagittal planes of the user, respectively.

### Claim 4 (depends on 3)

The head-mounted device as claimed in claim 3, wherein:
said main shell further includes an additional third tube body that is fixedly connected to said first and second tube bodies, that is adapted to be disposed at the other one of the user's ears, and that defines an imaginary fourth plane adapted to be parallel to the sagittal plane of the user; and
said stimulation unit further includes an additional third component that is received in said additional third tube body, and that is configured to be movable in at least one of rolling, sliding and flowing manners in said additional third tube body.

### Claim 5 (depends on 1)

The head-mounted device as claimed in claim 1, wherein the rigid body includes a plurality of steel balls.