Optical display device

Patent metadata

Field	Value
Publication number	US-12481122-B2
Application number	US-202318451825-A
Country	US
Kind code	B2
Filing date	Aug 17, 2023
Priority date	Aug 19, 2022
Publication date	Nov 25, 2025
Grant date	Nov 25, 2025

Abstract

An optical display device includes an image display element configured to emit image light, a deflection member configured to deflect the image light emitted from the image display element, an optical device including a lens barrel for accommodating a lens group including an objective lens and an eyepiece, and a moving mechanism provided at the lens barrel of the optical device and configured to hold a state in which at least the deflection member is moved in a direction intersecting an optical axis of the lens group.

First claim

What is claimed is:

1 . An optical display device, comprising
an image display element configured to emit image light; a deflection member configured to deflect the image light emitted from the image display element; an optical device including a lens barrel for accommodating a lens group including an objective lens and an eyepiece; and a moving mechanism provided at the lens barrel of the optical device and configured to move at least the deflection member in a direction intersecting an optical axis of the lens group.

2 . The optical display device according to claim 1 , further comprising a first housing portion provided with the moving mechanism and configured to hold at least the deflection member, wherein
the moving mechanism switches a position of the deflection member between a first position at which the optical axis of the lens group and the deflection member overlap each other and a second position at which the optical axis of the lens group and the deflection member do not overlap each other, by the first housing portion rotating around a rotary shaft intersecting the optical axis of the lens group and orthogonal to an outer circumferential surface of the lens barrel.

3 . The optical display device according to claim 2 , further comprising a light-guiding member including a light-incident portion on which the image light from the image display element is incident, a light-guiding portion for propagating the image light incident from the light-incident portion by total reflection, and a light-emitting portion for emitting the image light propagating through the light-guiding portion and deflected by the deflection member, wherein
the deflection member is provided at the light-guiding member, and the light-guiding member is held by the first housing portion.

4 . The optical display device according to claim 1 , further comprising a first housing portion provided with the moving mechanism and configured to hold at least the deflection member, wherein
the moving mechanism includes a first magnet provided at the first housing portion, a second magnet provided at the lens barrel, and a third magnet provided at the lens barrel at a position different from that of the second magnet, and switches a position of the deflection member between a first position at which the first magnet and the second magnet are attracted to each other to fix the first housing portion and the lens barrel in a state in which the optical axis of the lens group and the deflection member overlap each other, and a second position at which the first magnet and the third magnet are attracted to each other to fix the first housing portion and the lens barrel in a state in which the optical axis of the lens group and the deflection member do not overlap each other.

5 . The optical display device according to claim 1 , further comprising a first housing portion provided with the moving mechanism and configured to hold at least the deflection member, wherein
the moving mechanism switches a position of the deflection member between a first position at which the optical axis of the lens group and the deflection member overlap each other and a second position at which the optical axis of the lens group and the deflection member do not overlap each other, by the first housing portion rotating around a rotary shaft along the optical axis of the lens group.

6 . The optical display device according to claim 1 , further comprising:
a light-guiding member including a light-incident portion on which the image light from the image display element is incident, a light-guiding portion for propagating the image light incident from the light-incident portion by total reflection, and a light-emitting portion for emitting the image light propagating through the light-guiding portion and deflected by the deflection member, and provided with the deflection member; a holding member coupled to the lens barrel via the moving mechanism and configured to hold the light-guiding member; a second housing portion configured to accommodate the image display element; and a fixing portion configured to fix the second housing portion to the lens barrel, wherein the moving mechanism switches a position of the deflection member between a first position at which the light-incident portion of the light-guiding member and the image display element face each other and the optical axis of the lens group and the deflection member overlap each other, and a second position at which the light-incident portion of the light-guiding member and the image display element do not face each other and the optical axis of the lens group and the deflection member do not overlap each other, by the holding member rotating around a rotary shaft intersecting the optical axis of the lens group and along a tangential line of an outer circumferential surface of the lens barrel.

7 . The optical display device according to claim 6 , further comprising a positioning member configured to define a position of the light-incident portion of the light-guiding member and a position of the second housing portion, at the first position.

8 . The optical display device according to claim 7 , wherein
the positioning member includes a first magnet provided at the second housing portion and a second magnet having a polarity different from that of the first magnet and provided at the light-guiding member, and in the positioning member, the first magnet and the second magnet are attracted to each other when the deflection member is located at the first position.

9 . The optical display device according to claim 8 , wherein
an attracting surface of the first magnet and the second magnet is orthogonal to the optical axis of the lens group.

10 . The optical display device according to claim 1 , wherein
the deflection member is arranged on a light incident side of the objective lens.

11 . The optical display device according to claim 1 , wherein
the deflection member is arranged on a light emission side of the eyepiece.

Assignees

• Seiko Epson Corp

Inventors

• Ota Hitoshi
• Hamade Yuiga
• Ide Mitsutaka

Classifications

• G02B7/14 Primary

  adapted to interchange lenses {(G02B7/027 takes precedence)} · CPC title