Image display device

Patent metadata

Field	Value
Publication number	US-2016005231-A1
Application number	US-201514755124-A
Country	US
Kind code	A1
Filing date	Jun 30, 2015
Priority date	Jul 1, 2014
Publication date	Jan 7, 2016
Grant date	—

Abstract

An image display device used while mounted on a head of an observer includes: a left-eye display unit having an optical section adapted to form a virtual image for a left eye of the observer; a right-eye display unit having an optical section adapted to form a virtual image for a right eye of the observer; and an interpupillary adjustment mechanism adapted to adjust a distance between the left-eye display unit and the right-eye display unit, wherein the interpupillary adjustment mechanism includes a first adjustment mechanism capable of simultaneously adjusting a position of the left-eye display unit and a position of the right-eye display unit, and a second adjustment mechanism capable of independently adjusting only either one of the position of the left-eye display unit and the position of the right-eye display unit.

First claim

What is claimed is:

1 . An image display device used while mounted on a head of an observer comprising:
a left-eye display unit having an optical section adapted to form a virtual image for a left eye of the observer; a right-eye display unit having an optical section adapted to form a virtual image for a right eye of the observer; and an interpupillary adjustment mechanism adapted to adjust a distance between the left-eye display unit and the right-eye display unit, wherein the interpupillary adjustment mechanism includes
a first adjustment mechanism capable of simultaneously adjusting a position of the left-eye display unit and a position of the right-eye display unit, and
a second adjustment mechanism capable of independently adjusting only either one of the position of the left-eye display unit and the position of the right-eye display unit.

2 . The image display device according to claim 1 , wherein
the interpupillary adjustment mechanism includes
a lead screw provided with a first male screw section provided with a screw thread formed in a first screw direction, and a second male screw section provided with a screw thread formed in a second screw direction different from the first screw direction,
a left-eye support section adapted to support the left-eye display unit, and
a right-eye support section adapted to support the right-eye display unit,
either one of the left-eye support section and the right-eye support section is provided with a female screw to be screwed with the first male screw, and the other of the left-eye support section and the right-eye support section is provided with a screw coupling section, which has an inner peripheral surface provided with a female screw to be screwed with the second male screw, and is rotatable with respect to the other of the left-eye support section and the right-eye support section.

3 . The image display device according to claim 2 , further comprising:
a rotation restriction section adapted to restrict a rotation of the screw coupling section when rotating the lead screw, and not to restrict a rotation of the screw coupling section when rotating the screw coupling section.

4 . The image display device according to claim 3 , wherein
the rotation restriction section has a projection section provided to the other of the left-eye support section and the right-eye support section, and having pressure contact with the screw coupling section.

5 . The image display device according to claim 4 , wherein
the screw coupling section has a recessed section to which the projection section is inserted.

6 . The image display device according to claim 2 , further comprising:
a clutch adapted to switch between a rotation-restricted state in which a relative rotation between the screw coupling section and the other of the left-eye support section and the right-eye support section is restricted, and a rotation-allowed state in which the relative rotation between the screw coupling section and the other of the left-eye support section and the right-eye support section is allowed.

7 . The image display device according to claim 6 , wherein
the clutch is fitted into a space formed between an outer peripheral surface of the screw coupling section and the other of the left-eye support section and the right-eye support section in the rotation-restricted state, and the fit of the clutch into the space is released in the rotation-allowed state.

8 . The image display device according to claim 7 , wherein
the outer peripheral surface of the screw coupling section is tilted with respect to an axial direction of the lead screw.

9 . The image display device according to claim 8 , wherein
the clutch has a cylindrical section having a cylindrical shape, and an inner peripheral surface of the cylindrical section is tilted with respect to the axial direction of the lead screw.

Assignees

• Seiko Epson Corp

Inventors

• Yamaga Hirokazu

Classifications

• G02B27/0176 Primary

  characterised by mechanical features · CPC title

• G02B2027/0154

  with movable elements · CPC title

• G06T19/006 Primary

  Mixed reality (object pose determination, tracking or camera calibration for mixed reality G06T7/00) · CPC title

• G02B2027/0178

  Eyeglass type (eyeglass details G02C) · CPC title

• G02B7/12

  Adjusting pupillary distance of binocular pairs · CPC title