公开(公告)号：US20250138321A1

公开(公告)日：2025-05-01

申请号：US18923708

申请日：2024-10-23

Applicant: SEIKO EPSON CORPORATION

Inventor： Katsutoshi INOMOTO ,  Mitsutaka IDE ,  Takashi TAKEDA

IPC: G02B27/01 ,  G02B5/30 ,  G02B27/14

Abstract: A virtual-image display device or an optical unit includes a first display device configured to output image light of circularly polarized light; a first reflection member having a flat surface and configured to reflect the image light to a diagonal direction; and a second reflection member having a positive power and configured to reflect, toward the first reflection member, the image light reflected at the first reflection member. The first reflection member includes a first optical function layer that is one of a cholesteric liquid crystal layer and a transmissive reflection layer. The second reflection member includes a second optical function layer that is the other one of the cholesteric liquid crystal layer and the transmissive reflection layer.

公开(公告)号：US20240248307A1

公开(公告)日：2024-07-25

申请号：US18415542

申请日：2024-01-17

Applicant: SEIKO EPSON CORPORATION

Inventor： Takashi TAKEDA

IPC: G02B27/01 ,  G02B26/08 ,  G02B26/10

CPC classification number: G02B27/0172 ,  G02B26/0816 ,  G02B26/10 ,  G02B2027/0178

Abstract: A head-mounted display apparatus includes: a first projection optical system that irradiates a first scattering region with image light, a second projection optical system that irradiates a second scattering region with the image light, a first polarizing member arranged at a face side of the scattering member and including a first polarizing region provided corresponding to the first scattering region and the second scattering region for restricting the image light scattered by the scattering member to a first polarization direction, a second polarizing member arranged at an external side of a position of the first polarizing member and including a second polarizing region for restricting the external light to a second polarization direction, and a polarization separation lens element arranged at a face side of the first polarizing member and having refractive power that selectively acts on polarized light of the image light.

公开(公告)号：US20210239990A1

公开(公告)日：2021-08-05

申请号：US17162873

申请日：2021-01-29

Applicant: SEIKO EPSON CORPORATION

Inventor： Masatoshi YONEKUBO ,  Takashi TAKEDA ,  Mitsutaka IDE

IPC: G02B27/01

Abstract: A display module includes an image light generation device configured to generate image light, a first reflection section configured to reflect the image light from the image light generation device, a first diffraction element configured to diffract the image light entering a first incident surface, a second reflection section configured to reflect the image light from the first diffraction element, and a second diffraction element configured to diffract the image light entering a second incident surface, thereby forming an exit pupil. When viewed from a normal line direction of a virtual plane including a normal line of the first incident surface and a normal line of the second incident surface, an optical axis of the image light from the image light generation device toward the first reflection section and an optical axis of the image light from the first diffraction element toward the second reflection section intersect each other.

公开(公告)号：US20210096377A1

公开(公告)日：2021-04-01

申请号：US17036200

申请日：2020-09-29

Applicant: SEIKO EPSON CORPORATION

Inventor： Masayuki TAKAGI ,  Akira KOMATSU ,  Takashi TAKEDA ,  Toshiaki MIYAO ,  Tokito YAMAGUCHI

IPC: G02B27/01

Abstract: A head-mounted display includes a display device configured to display an image, a diopter adjustment device configured to adjust a diopter, and a correction processing circuit serving as an image correction device configured to correct a display image in accordance with a degree of diopter adjustment. In the adjustments made on a left side and a right side, respectively, after diopter adjustment, the display image is corrected in accordance with the degree of diopter adjustment.

公开(公告)号：US20200225483A1

公开(公告)日：2020-07-16

申请号：US16742996

申请日：2020-01-15

Applicant: SEIKO EPSON CORPORATION

Inventor： Tokito YAMAGUCHI ,  Masayuki TAKAGI ,  Toshiaki MIYAO ,  Takashi TAKEDA

IPC: G02B27/01 ,  F21V8/00

Abstract: A virtual image display device includes a video image element that displays an image, and a light-guiding member that guides video image light from the video image element by reflection and transmission at a plurality of light-guiding surfaces. Among the plurality of light-guiding surfaces, with respect to an incident-side light-guiding surface and an emission-side light-guiding surface that are adjacent to each other, and an opposing light-guiding surface that faces the incident-side light-guiding surface and the emission-side light-guiding surface, a thickness from the incident-side light-guiding surface to the opposing light-guiding surface is caused to be smaller than a thickness from the emission-side light-guiding surface to the opposing light-guiding surface.

公开(公告)号：US20200041795A1

公开(公告)日：2020-02-06

申请号：US16531545

申请日：2019-08-05

Applicant: SEIKO EPSON CORPORATION

Inventor： Tokito YAMAGUCHI ,  Masayuki TAKAGI ,  Toshiaki MIYAO ,  Akira KOMATSU ,  Takashi TAKEDA

IPC: G02B27/01 ,  G02B3/08

Abstract: A virtual image display device includes an image element configured to display an image, a first optical unit disposed at a position where image light is extracted, a second optical unit disposed at the image element side with respect to the first optical unit, a half mirror provided on a serrated surface formed at a bonding portion between the first optical unit and the second optical unit, and a transmission/reflection selection member that is provided at a light emitting side of the first optical unit and that is configured to selectively transmit or reflect light depending on a polarization state of the light.

公开(公告)号：US20200033607A1

公开(公告)日：2020-01-30

申请号：US16524530

申请日：2019-07-29

Applicant: SEIKO EPSON CORPORATION

Inventor： Takashi TAKEDA ,  Masayuki TAKAGI ,  Toshiaki MIYAO ,  Tokito YAMAGUCHI

IPC: G02B27/01 ,  G02B17/08

Abstract: A virtual image display apparatus includes a display device (image forming unit), a lens configured to refract imaging light from the display device, a first mirror member configured to reflect imaging light that passed through the lens, a second mirror member configured to reflect the imaging light reflected by the first mirror member, and a third mirror member of a transmissive type configured to reflect the imaging light reflected by the second mirror member toward a position of an exit pupil. The lens is asymmetric with respect to an optical axis in a first direction corresponding to an eccentric direction defined by the first mirror member and the second mirror member, and is symmetric, across the optical axis, with respect to a second direction orthogonal to the first direction.

公开(公告)号：US20190265494A1

公开(公告)日：2019-08-29

申请号：US16284404

申请日：2019-02-25

Applicant: SEIKO EPSON CORPORATION

Inventor： Masayuki TAKAGI ,  Takashi TAKEDA ,  Akira KOMATSU ,  Toshiaki MIYAO ,  Tokito YAMAGUCHI

IPC: G02B27/28 ,  G02B5/30 ,  G02B27/01

Abstract: A first lens and a second lens are bonded, and each of a light emitting plane and a light incident plane is a flat surface to shorten a configuration in an optical axis direction, and simultaneously, various optical elements such as a transmission/reflection selection member and the like can be mounted on a flat surface portion. Further, by providing a half mirror in a bonding portion between a convex surface and a concave surface to give power in folding an optical path, an image with a wide angle of view can be formed.

公开(公告)号：US20190265493A1

公开(公告)日：2019-08-29

申请号：US16284189

申请日：2019-02-25

Applicant: SEIKO EPSON CORPORATION

Inventor： Masayuki TAKAGI ,  Takashi TAKEDA ,  Akira KOMATSU ,  Toshiaki MIYAO ,  Tokito YAMAGUCHI

IPC: G02B27/28 ,  G02B27/01 ,  G02B5/30

Abstract: A first lens and a second lens are bonded to each other and configured to be short in an optical axis direction. Further, by providing a half mirror in a bonding portion between a convex surface and a concave surface, power is given when folding an optical path, and additionally, by setting a refractive index of the first lens larger than a refractive index of the second lens, an image with a wide angle of view can be formed.

公开(公告)号：US20190212562A1

公开(公告)日：2019-07-11

申请号：US16242552

申请日：2019-01-08

Applicant: SEIKO EPSON CORPORATION

Inventor： Hayato MATSUKI ,  Takashi TAKEDA ,  Shohei YOSHIDA

IPC: G02B27/01 ,  F21V8/00

Abstract: A display device of the invention includes: an image generation part configured to generate image light; a light guide being configured to guide the image light; and an emitting part configured to cause the image light to emit from the light guide toward an exit pupil, in which the emitting part includes a plurality of half mirrors which are disposed parallel to one another at an interval, each of the plurality of half mirrors being configured to reflect a part of the image light and cause another part of the image light to pass through the half mirror, and in at least one half mirror of the plurality of half mirrors, when Bmax represents a maximum luminance, Bmin represents a minimum luminance, and a luminance ratio R (%) is defined as R=[(Bmax−Bmin)/Bmax]×100, R≤30 is satisfied.