# US 2021/0243428 A1 · Image display device

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- Number: US 2021/0243428 A1
- Document ID: US20210243428A1
- Status: Published application
- Kind: A1
- Application number: 17/157,811
- Filed: 2021-01-25
- Published: 2021-08-05
- Earliest claimed: 2020-01-31
- Assignees: Canon Kabushiki Kaisha
- Applicants: Canon Kabushiki Kaisha
- Inventors: Marina Kitakami; Toshiharu Kawai
- Web page: https://patentgrep.com/patent/US20210243428A1

## CPC

- H04N 13/239: using two two-dimensional [2D] image sensors having a relative position equal to or related to the interocular distance (H04N13/243 takes precedence)
- H04N 13/344: with head-mounted left-right displays
- H04N 13/204: using stereoscopic image cameras (stereoscopic photography G03B35/00)
- G02B 25/001: {Eyepieces}
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

An image display device includes a display optical system, a base including a display optical system guide unit configured to guide the display optical system in a substantially linear direction, a main body exterior configured to house the base, a display exterior configured to cover the display optical system, and a display exterior guide unit configured to guide the display exterior in a substantially linear direction relative to the main body exterior, wherein the display optical system is engaged with the display exterior to move in conjunction with the display exterior, and wherein the base and the main body exterior are engaged with each other by an engagement mechanism configured to suppress transmission of an external force applied to the main body exterior to the base.

## Claims

### Claim 1

An image display device comprising:
a display optical system;
a base including a display optical system guide unit configured to guide the display optical system in a substantially linear direction;
a main body exterior configured to house the base;
a display exterior configured to cover the display optical system; and
a display exterior guide unit configured to guide the display exterior in a substantially linear direction relative to the main body exterior,
wherein the display optical system is engaged with the display exterior to move in conjunction with the display exterior, and
wherein the base and the main body exterior are engaged with each other by an engagement mechanism configured to suppress transmission of an external force applied to the main body exterior to the base.

### Claim 2 (depends on 1)

The image display device according to claim 1,
wherein one of the base and the main body exterior includes a shaft portion,
wherein the other of the base and the main body exterior includes a shaft hole, and
wherein the engagement mechanism establishes engagement by insertion of the shaft portion into the shaft hole in a loose-fit state.

### Claim 3 (depends on 2)

The image display device according to claim 2, wherein the base includes a rotation stop portion configured to stop the base from rotating around the shaft portion and the shaft hole.

### Claim 4 (depends on 1)

The image display device according to claim 1, further comprising a holding mechanism configured to hold the display exterior at any position relative to the main body exterior.

### Claim 5 (depends on 1)

The image display device according to claim 1, wherein at least one of the display exterior and the main body exterior includes a limiting mechanism configured to limit movement of the display exterior in a case where the display exterior moves relative to the main body exterior.

### Claim 6 (depends on 1)

The image display device according to claim 1, wherein the base includes at least one of an image capturing unit configured to acquire an image of a surrounding area and an acquisition unit configured to acquire position information.

### Claim 7 (depends on 1)

The image display device according to claim 1, wherein the display exterior moves relative to the main body exterior in a direction different from the substantially linear direction, and is positioned with respect to the display optical system.