公开(公告)号：US11665950B2

公开(公告)日：2023-05-30

申请号：US17020784

申请日：2020-09-14

Applicant: FUJIFILM Corporation

Inventor： Takashi Yonemoto

IPC: G02F1/1335 ,  H01L27/32 ,  G02B5/30 ,  H01L27/15

CPC classification number: H01L27/3232 ,  G02B5/3016 ,  G02F1/133528 ,  H01L27/156 ,  H01L27/3216

Abstract: An object of the present invention is to provide a display device capable of achieving both an effect of preventing reflection of external light and improvement in utilization efficiency of light emitted from a light emitting element. An electroluminescent display device includes a substrate having a plurality of light emitting elements using electroluminescence, a λ/4 wavelength plate, and a polarizing plate including a patterned polarizing layer in this order, in which the patterned polarizing layer has a region A having a polarization degree of less than 80% and a region B having a polarization degree of 80% or more, and further, a position of the region A of the patterned polarizing layer corresponds to a position of the light emitting element of the electroluminescent substrate.

公开(公告)号：US10781369B2

公开(公告)日：2020-09-22

申请号：US16426313

申请日：2019-05-30

Applicant: FUJIFILM Corporation

Inventor： Takashi Yonemoto

IPC: C09K11/70 ,  B32B27/30 ,  C08F220/10 ,  C08J7/04 ,  C09K11/02 ,  C09K11/56 ,  G02B5/20 ,  F21V9/00 ,  C09K11/08 ,  F21S2/00

Abstract: Provided are a wavelength conversion member which contains a phosphor such as a quantum dot and has high reproducibility of white light; and a backlight unit. The wavelength conversion member includes a wavelength conversion layer having a resin layer that is provided with a plurality of concave portions which are discretely disposed on one main surface thereof; and a plurality of fluorescent regions containing phosphors, which are disposed in the concave portions formed in the resin layer, in which a surface roughness Ra of a surface of the resin layer on a side where the concave portions are formed is 0.3 to 5 μm.

公开(公告)号：US12189229B2

公开(公告)日：2025-01-07

申请号：US18679967

申请日：2024-05-31

Applicant: FUJIFILM Corporation

Inventor： Takashi Yonemoto ,  Masaaki Suzuki ,  Koji Iijima ,  Hiroshi Sato ,  Ayato Sekine

IPC: G02F1/1335 ,  G02B27/01 ,  G02F1/13363

Abstract: Provided are a liquid crystal diffraction element, an image display apparatus, and a head mounted display where occurrence of a ghost in a head mounted display such as VR glasses can be suppressed. The liquid crystal diffraction element includes at least an optically-anisotropic layer that is formed of a liquid crystal composition including a liquid crystal compound, in which the optically-anisotropic layer has a liquid crystal alignment pattern in which an orientation of an optical axis derived from the liquid crystal compound changes while continuously rotating in at least one in-plane direction, in a case where a length over which the optical axis rotates by 180 degrees in the one direction is set as a single period, the single period gradually changes in the one direction, and in a case where an average period of 50 periods in the one direction from a period having a longest length of the single period is represented by Λa and a main surface of the optically-anisotropic layer in a region having a period shorter than or equal to the average period Λa is observed with an optical microscope, both of a ratio between a maximum value and a minimum value among widths of 30 continuous bright lines and a ratio between a maximum value and a minimum value among widths of 30 continuous dark lines in the region are 1.2 or less.

公开(公告)号：US12181771B2

公开(公告)日：2024-12-31

申请号：US18192498

申请日：2023-03-29

Applicant: FUJIFILM Corporation

Inventor： Takashi Yonemoto ,  Yukito Saitoh ,  Hiroshi Sato

IPC: G02F1/29 ,  G02B5/18 ,  G02B5/30

Abstract: Provided is a transmissive liquid crystal diffraction element having a large diffraction angle and a high diffraction efficiency. The transmissive liquid crystal diffraction element includes a plurality of optically-anisotropic layers that are formed of a liquid crystal composition including a liquid crystal compound in a thickness direction, in which the optically-anisotropic layer has a liquid crystal alignment pattern in which a direction of an optical axis derived from the liquid crystal compound changes while continuously rotating in at least one in-plane direction, the one in-plane directions of the plurality of optically-anisotropic layers are parallel to each other, in two optically-anisotropic layers adjacent to each other among the plurality of optically-anisotropic layers, a rotation direction of the optical axis in the liquid crystal alignment pattern of one optically-anisotropic layer and a rotation direction of the optical axis in the liquid crystal alignment pattern of the other optically-anisotropic layer are opposite to each other, in cross-sectional images of the plurality of optically-anisotropic layers obtained by observing cross-sections taken in a thickness direction parallel to the one in-plane direction with a scanning electron microscope, the plurality of optically-anisotropic layers have bright portions and dark portions extending from one surface to another surface, and tilt angles of the dark portions of the plurality of optically-anisotropic layers change in order in the thickness direction.

公开(公告)号：US12025820B2

公开(公告)日：2024-07-02

申请号：US18541062

申请日：2023-12-15

Applicant: FUJIFILM Corporation

Inventor： Yukito Saitoh ,  Hiroshi Sato ,  Takashi Yonemoto

IPC: G02B5/18

CPC classification number: G02B5/1866

Abstract: Provided is a transmissive liquid crystal diffraction element that can diffract different polarized light components in the same direction and has high diffraction efficiency with respect to unpolarized light. The transmissive liquid crystal diffraction element includes first to fourth optically-anisotropic layers each of which has a liquid crystal alignment pattern in which a direction of an optical axis changes while continuously rotating in at least one in-plane direction, in which the optical axis in each of the first to the fourth optically-anisotropic layers is twisted in a thickness direction, rotation directions of the optical axes in the liquid crystal alignment patterns and twisted directions of the optical axes in the thickness direction are opposite to each other in the first optically-anisotropic layer and the second optically-anisotropic layer, rotation directions of the optical axes in the liquid crystal alignment patterns and twisted directions of the optical axes in the thickness direction are opposite to each other in the third optically-anisotropic layer and the fourth optically-anisotropic layer, single periods of the liquid crystal alignment patterns are the same in the first optically-anisotropic layer and the second optically-anisotropic layer, single periods of the liquid crystal alignment patterns are the same in the third optically-anisotropic layer and the fourth optically-anisotropic layer, and the single periods of the liquid crystal alignment patterns are different in the first optically-anisotropic layer and the third optically-anisotropic layer.

公开(公告)号：US11988857B2

公开(公告)日：2024-05-21

申请号：US17862967

申请日：2022-07-12

Applicant: FUJIFILM Corporation

Inventor： Takashi Yonemoto ,  Yukito Saitoh ,  Yohei Hamachi ,  Makoto Ishiguro

IPC: G02B5/30 ,  C09K19/50 ,  G02B27/00

CPC classification number: G02B5/3016 ,  C09K19/50 ,  G02B27/0018

Abstract: An object is to provide an optical system capable of improving the brightness of a main image while eliminating a ghost image. In an optical system including: an image display device that emits an image; a linear polarizer through which light associated with the image passes; a first quarter wavelength plate which receives the light from the linear polarizer; a half mirror; a reflective polarizer; and a second quarter wavelength plate provided between the reflective polarizer and the half mirror, retardance of the first quarter wavelength plate and retardance of the second quarter wavelength plate are equal, and thus the object is achieved.

公开(公告)号：US11635558B2

公开(公告)日：2023-04-25

申请号：US17702313

申请日：2022-03-23

Applicant: FUJIFILM Corporation

Inventor： Takashi Yonemoto ,  Naoki Koito ,  Shun Inoue

IPC: G02F1/13363 ,  G02B5/30 ,  H01L51/52

Abstract: Provided is an image display device including an optical laminate having, in order, a pressure-sensitive adhesive layer, a specific laminate including an alignment layer and an optically anisotropic layer which are adjacent to each other, and another pressure-sensitive adhesive layer in this order, in which the pressure-sensitive adhesive layers are adjacent to the two surfaces of the specific laminate. The specific laminate has a thickness of 15 μm or less, the optically anisotropic layer has a thickness of 5 μm or less, and a thickness d of the alignment layer and an elastic modulus E of the alignment layer satisfy Expression (1): −E+0.45×d+3.6>0 (1), where d is in units of μm, and E is in units of GPa.

公开(公告)号：US11378838B2

公开(公告)日：2022-07-05

申请号：US16911832

申请日：2020-06-25

Applicant: FUJIFILM Corporation

Inventor： Naoya Shibata ,  Naoya Nishimura ,  Wataru Hoshino ,  Yuzo Fujiki ,  Takashi Yonemoto

IPC: G02F1/1335 ,  C09K19/60 ,  G02F1/1337 ,  G02F1/1347

Abstract: An object of the present invention is to provide a method for manufacturing an optical laminate in which an alignment defect is less likely to occur in a light-absorbing anisotropic layer even in a case where a surface of a photo-alignment layer is rubbed; an optical laminate; and an image display device. The method for manufacturing an optical laminate according to an embodiment of the present invention is a method for manufacturing an optical laminate in which an optical laminate including a photo-alignment layer and a light-absorbing anisotropic layer and having a front transmittance of 60% or less is produced and which includes a photo-alignment layer formation step of forming a photo-alignment layer on a polymer film, and a light-absorbing anisotropic layer formation step of applying a liquid crystal composition containing a dichroic substance and a high-molecular liquid crystalline compound onto the photo-alignment layer to form a light-absorbing anisotropic layer.

公开(公告)号：US11294198B2

公开(公告)日：2022-04-05

申请号：US16540390

申请日：2019-08-14

Applicant: FUJIFILM Corporation

Inventor： Naoyoshi Yamada ,  Takashi Yonemoto ,  Hirofumi Toyama ,  Yukito Saitoh

IPC: G02B30/56 ,  G02B5/124 ,  G02B5/30 ,  G02B27/28

Abstract: An optical apparatus includes a beam splitter that transmits a part of an incidence ray and reflects another part of the incidence ray, a mirror member that includes a mirror surface arranged at a position at which light transmitted through the beam splitter is incident, and a retroreflective member that is arranged at a position at which light specularly reflected on the mirror surface, to be incident on the beam splitter and specularly reflected by the beam splitter is incident.

公开(公告)号：US11914172B2

公开(公告)日：2024-02-27

申请号：US17376731

申请日：2021-07-15

Applicant: FUJIFILM Corporation

Inventor： Hirofumi Toyama ,  Tatsuya Oba ,  Takashi Yonemoto

IPC: G02B5/00 ,  B82Y20/00 ,  G02B5/20 ,  G02B5/02 ,  G02F1/1335 ,  G02F1/13357

CPC classification number: G02B5/003 ,  B82Y20/00 ,  G02B5/20 ,  G02B5/0242 ,  G02F1/133603 ,  G02F1/133606 ,  G02F1/133611 ,  G02F1/133614

Abstract: Provided are a light absorbing material-containing film which contains quantum dots or the like and is capable of suppressing in-plane luminance unevenness and chromaticity unevenness; and a backlight unit. The light absorbing material-containing film includes a light absorbing material-containing layer that has a plurality of cylindrical or polygonal prism-shaped resin portions discretely disposed and a light absorption region contain light absorbing bodies and formed between the plurality of resin portions; a first substrate film that is laminated on one main surface of the light absorbing material-containing layer; and a second substrate film laminated on the other main surface of the light absorbing material-containing layer, where the light absorption region contains at least one phosphor that serves as the light absorbing body, and a binder.