Display apparatus

Patent metadata

Field	Value
Publication number	US-2021199975-A1
Application number	US-201917259377-A
Country	US
Kind code	A1
Filing date	Jul 11, 2019
Priority date	Jul 31, 2018
Publication date	Jul 1, 2021
Grant date	—

Abstract

A display apparatus of the present disclosure includes: a left eyepiece display unit including a left-eye image display device and a left eyepiece optical system guiding a displayed left-eye display image to a left eye; and a right eyepiece display unit including a right-eye image display device and a right eyepiece optical system guiding a displayed right-eye display image to a right eye, and an image magnification upon observation by both eyes is twice or more. The left eyepiece optical system and the right eyepiece optical system each include a plurality of single lenses, and at least one of the single lenses is a free-form surface lens including a resin material. At least one of the single lenses is arranged in at least one of an eccentric state or a rotated state with respect to an optical axis of the left-eye image display device or the right-eye image display device.

First claim

1 . A display apparatus comprising:
a left eyepiece display unit including a left-eye image display device and a left eyepiece optical system that guides a left-eye display image displayed on the left-eye image display device to a left eye; and a right eyepiece display unit including a right-eye image display device and a right eyepiece optical system that guides a right-eye display image displayed on the right-eye image display device to a right eye, an image magnification upon observation by both eyes being twice or more, the left eyepiece optical system and the right eyepiece optical system each including a plurality of single lenses, at least one of the plurality of single lenses comprising a free-form surface lens including a resin material, at least one of the plurality of single lenses being arranged in at least one of an eccentric state or a rotated state with respect to an optical axis of the left-eye image display device or the right-eye image display device, and the left-eye display image and the right-eye display image each including an overlap image region and a non-overlap image region, the overlap image region including a mutually common image part, the non-overlap image region including a mutually different image part and being a region outside the overlap image region.

2 . The display apparatus according to claim 1 , wherein the left eyepiece optical system and the right eyepiece optical system each include an eyepiece of a three-group three-lens configuration in which a first lens, a second lens, and a third lens are arranged as the plurality of single lenses in order from side of an eye point toward image side.

3 . The display apparatus according to claim 2 , wherein
the first lens comprises a spherical lens having a positive refractive power including a material of a refractive index of 1.439 or more with respect to a d-line, and a lens surface of the first lens on the side of the eye point has a convex shape or a planar shape.

4 . The display apparatus according to claim 2 , wherein an optical axis of the first lens is parallel to a reference optical axis which employs the eye point as a reference.

5 . The display apparatus according to claim 2 , wherein at least one of the second lens or the third lens comprises a free-form surface lens.

6 . The display apparatus according to claim 2 , wherein
at least one of the first lens, the second lens, or the third lens is arranged in at least one of the eccentric state or the rotated state with respect to a reference optical axis which employs the eye point as a reference, and the following expressions:
si ,max<25 (mm)  (1)

θ i ,max<25(°)  (2)

are satisfied, where
si,max denotes a maximum absolute value of an eccentric amount of each of respective optical axes of the first lens, the second lens, and the third lens with respect to the reference optical axis in a direction orthogonal to the reference optical axis, and
θi,max denotes a maximum absolute value of a rotational amount of each of the respective optical axes of the first lens, the second lens, and the third lens with respect to the reference optical axis.

7 . The display apparatus according to claim 2 , wherein an optical axis of the first lens is non-parallel to a reference optical axis which employs the eye point as a reference.

8 . The display apparatus according to claim 2 , wherein the first lens comprises a Fresnel lens.

9 . The display apparatus according to claim 1 , wherein the left eyepiece optical system and the right eyepiece optical system each include an eyepiece of a four-group four-lens configuration in which a first lens, a second lens, a third lens, and a fourth lens are arranged as the plurality of single lenses in order from side of an eye point toward image side.

10 . The display apparatus according to claim 9 , wherein
the first lens comprises a spherical lens having a positive refractive power including a material of a refractive index of 1.439 or more with respect to a d-line, and a lens surface of the first lens on the side of the eye point has a convex shape or a planar shape.

11 . The display apparatus according to claim 9 , wherein an optical axis of the first lens is parallel to a reference optical axis which employs the eye point as a reference.

12 . The display apparatus according to claim 9 , wherein at least one of the second lens, the third lens, or the fourth lens comprises a free-form surface lens.

13 . The display apparatus according to claim 9 , wherein
at least one of the first lens, the second lens, the third lens, or the fourth lens is arranged in at least one of the eccentric state or the rotated state with respect to a reference optical axis which employs the eye point as a reference, and the following expressions:
si ,max<25 (mm)  (1)

θ i ,max<25(°)  (2)

are satisfied, where
si,max denotes a maximum absolute value of an eccentric amount of each of respective optical axes of the first lens, the second lens, the third lens, and the fourth lens with respect to the reference optical axis in a direction orthogonal to the reference optical axis, and
θi,max denotes a maximum absolute value of a rotational amount of each of the respective optical axes of the first lens, the second lens, the third lens, and the fourth lens with respect to the reference optical axis.

14 . The display apparatus according to claim 9 , wherein an optical axis of the first lens is non-parallel to a reference optical axis which employs the eye point as a reference.

15 . The display apparatus according to claim 9 , wherein the first lens comprises a Fresnel lens.

16 . The display apparatus according to claim 1 , wherein, in each of the left eyepiece optical system and the right eyepiece optical system, the plurality of single lenses includes a varifocal lens group.

17 . The display apparatus according to claim 16 , wherein, in each of the left eyepiece optical system and the right eyepiece optical system, the plurality of single lenses includes an eccentric lens group and the varifocal lens group in order from side of an eye point toward image side.

18 . The display apparatus according to claim 1 , wherein
the non-overlap image region is a region on outer left side of the overlap image region in the left-eye display image, and the non-overlap image region is a region on outer right side of the overlap image region in the right-eye display image.

Assignees

• Sony Corp

Inventors

• Matsumoto Mitsuharu
• Suzuki Mamoru
• Ichikawa Susumu
• Matsuyama Takatoshi
• Nakamura Masatoshi

Classifications

• G02B1/041

  Lenses · CPC title

• G02B2027/0132

  comprising binocular systems · CPC title

• G02B2003/0093

  characterised by the shape · CPC title

• G02B27/0172 Primary

  characterised by optical features · CPC title

• G02B25/001

  Eyepieces · CPC title