Patents by Inventor Takashi YONEMOTO
Takashi YONEMOTO has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 11635558Abstract: 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 ?m or less, the optically anisotropic layer has a thickness of 5 ?m 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 ?m, and E is in units of GPa.Type: GrantFiled: March 23, 2022Date of Patent: April 25, 2023Assignee: FUJIFILM CorporationInventors: Takashi Yonemoto, Naoki Koito, Shun Inoue
-
Publication number: 20230123608Abstract: An optical element includes an optically-anisotropic layer that is formed of a liquid crystal composition including a liquid crystal compound having a polymerizable group, in which a ratio of a bend elastic constant K33 to a splay elastic constant K11 in the liquid crystal composition satisfies 0.8?K33/K11?1.2 at any temperature of a nematic temperature range, and 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.Type: ApplicationFiled: December 16, 2022Publication date: April 20, 2023Applicant: FUJIFILM CorporationInventors: Yuki FUKUSHIMA, Keisuke KODAMA, Shunya KATOH, Mitsuyoshi ICHIHASHI, Yukito SAITOH, Takashi YONEMOTO, Hiroshi SATO
-
Publication number: 20230124399Abstract: A liquid crystal composition includes: at least one of a compound represented by Formula (I) or a compound represented by Formula (II); and a rod-like liquid crystal compound having a polymerizable group that does not correspond to both of Formula (I) and Formula (II)Type: ApplicationFiled: December 13, 2022Publication date: April 20, 2023Applicant: FUJIFILM CorporationInventors: Yuki FUKUSHIMA, Keisuke KODAMA, Mitsuyoshi ICHIHASHI, Shunya KATOH, Yukito SAITOH, Takashi YONEMOTO, Hiroshi SATO
-
Publication number: 20230097214Abstract: A transmissive liquid crystal diffraction element includes a first optically-anisotropic layer and a second optically-anisotropic layer each of which has a liquid crystal alignment pattern in which a direction of an optical axis derived from a liquid crystal compound changes while continuously rotating in at least one in-plane direction, in which a rotation direction of the optical axis in the liquid crystal alignment pattern of the first optically-anisotropic layer and a rotation direction of the optical axis in the liquid crystal alignment pattern of the second optically-anisotropic layer are opposite to each other, and a single period of the liquid crystal alignment pattern in the first optically-anisotropic layer and a single period of the liquid crystal alignment pattern in the second optically-anisotropic layer are the same.Type: ApplicationFiled: November 17, 2022Publication date: March 30, 2023Applicant: FUJIFILM CorporationInventors: Yukito SAITOH, Hiroshi SATO, Takashi YONEMOTO, Jun WATANABE, Mitsuyoshi ICHIHASHI, Keisuke KODAMA
-
Publication number: 20220389319Abstract: Provided are a liquid crystal composition that is capable of forming a light absorption anisotropic film having a low reflectance, and a light absorption anisotropic film, a laminate, and an image display device, each of which is obtained using the liquid crystal composition. The liquid crystal composition contains a side-chain type high-molecular-weight liquid crystalline compound and a dichroic substance, in which the side-chain type high-molecular-weight liquid crystalline compound is a copolymer having a repeating unit M including a mesogenic group and a repeating unit F including a fluorine atom.Type: ApplicationFiled: July 22, 2022Publication date: December 8, 2022Applicant: FUJIFILM CorporationInventors: Keigo SHIGA, Wataru HOSHINO, Hiroshi MATSUYAMA, Takashi YONEMOTO
-
Publication number: 20220373729Abstract: 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.Type: ApplicationFiled: July 12, 2022Publication date: November 24, 2022Applicant: FUJIFILM CorporationInventors: Takashi YONEMOTO, Yukito SAITOH, Yohei HAMACHI, Makoto ISHIGURO
-
Publication number: 20220281191Abstract: Provided is a method for producing a light absorption anisotropic film having a three-dimensional shape and having excellent alignment, which is capable of manufacturing a light absorption anisotropic film having a high degree of polarization even where a three-dimensional shape is provided by heating molding. The method includes a step of producing an intermediate laminate having an optical coating film formed using a liquid crystal composition containing a liquid crystalline compound and a dichroic substance, and an alignment film; a step of heating the intermediate laminate produced by the film forming step to impart a three-dimensional shape; an aligning step of aligning a liquid crystalline component included in the optical coating film in the intermediate laminate imparted with the three-dimensional shape by the heating molding step to produce a light absorption anisotropic film; and a step of curing the light absorption anisotropic film produced by the aligning step.Type: ApplicationFiled: May 24, 2022Publication date: September 8, 2022Applicant: FUJIFILM CorporationInventors: Takashi YONEMOTO, Naoki KOITO, Yumi KATO, Naoyoshi YAMADA
-
Publication number: 20220229218Abstract: 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 ?m or less, the optically anisotropic layer has a thickness of 5 ?m 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 ?m, and E is in units of GPa.Type: ApplicationFiled: March 23, 2022Publication date: July 21, 2022Applicant: FUJIFILM CorporationInventors: Takashi YONEMOTO, Naoki KOITO, Shun INOUE
-
Patent number: 11378838Abstract: 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.Type: GrantFiled: June 25, 2020Date of Patent: July 5, 2022Assignee: FUJIFILM CorporationInventors: Naoya Shibata, Naoya Nishimura, Wataru Hoshino, Yuzo Fujiki, Takashi Yonemoto
-
Patent number: 11294198Abstract: 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.Type: GrantFiled: August 14, 2019Date of Patent: April 5, 2022Assignee: FUJIFILM CorporationInventors: Naoyoshi Yamada, Takashi Yonemoto, Hirofumi Toyama, Yukito Saitoh
-
Patent number: 11249323Abstract: An optical film includes a cholesteric liquid crystal layer formed in a stripe-shaped pattern in which an optically anisotropic region having optical anisotropy and an optically isotropic region having optical isotropy are alternately disposed, a helical axis of a cholesteric liquid crystal in the optically anisotropic region is oriented in one axial direction tin a plane of the optical film, and the helical axis is oriented in a normal direction t of a boundary surface between the optically anisotropic region and the optically isotropic region.Type: GrantFiled: October 16, 2019Date of Patent: February 15, 2022Assignee: FUJIFILM CorporationInventors: Yukito Saitoh, Daisuke Kashiwagi, Hirofumi Toyama, Naoyoshi Yamada, Takashi Yonemoto, Eiichiro Aminaka
-
Publication number: 20210341652Abstract: 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.Type: ApplicationFiled: July 15, 2021Publication date: November 4, 2021Applicant: FUJIFILM CorporationInventors: Hirofumi TOYAMA, Tatsuya OBA, Takashi YONEMOTO
-
Publication number: 20210302773Abstract: The present invention provides a light absorption anisotropic film excellent in adhesiveness to an adjacent layer, and a laminate and an image display device, in which the light absorption anisotropic film is used. The light absorption anisotropic film is formed from a liquid crystal composition that contains a high-molecular weight liquid crystal compound and a dichroic substance, and is a light absorption anisotropic film in which regarding a signal derived from the dichroic substance detected by a time-of-flight secondary ion mass spectrometry, a relationship between a maximum intensity Imax in a thickness direction of a film and an intensity Isur on at least one surface of the film satisfies Expression (I-1) 2?Imax/Isur.Type: ApplicationFiled: June 3, 2021Publication date: September 30, 2021Applicant: FUJIFILM CorporationInventors: Naoki KOITO, Takashi YONEMOTO, Tetsuro OTSUKA, Jun TAKEDA
-
Patent number: 11131800Abstract: The backlight unit includes: a light guide that includes an incidence surface and an emission surface facing each other; and a light source portion including a plurality of point light sources that are two-dimensionally arranged to face the incidence surface of the light guide, in which light emitted from the light source portion is incident into the incidence surface of the light guide and emitted from the emission surface, the backlight unit is driven by local dimming in which at least two point light sources among the plurality of point light sources are used as a minimum point lighting unit, the light guide includes a plurality of light advancing direction conversion portions and a plurality of light extraction portions, each of the light advancing direction conversion portions is provided at each of positions on the incidence surface facing the plurality of point light sources and changes an advancing direction of each of light components to a direction in which the light component is guided in the lightType: GrantFiled: July 9, 2020Date of Patent: September 28, 2021Assignee: FUJIFILM CORPORATIONInventors: Takashi Yonemoto, Hirofumi Toyama, Naoyoshi Yamada
-
Publication number: 20200411609Abstract: 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 ?/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.Type: ApplicationFiled: September 14, 2020Publication date: December 31, 2020Applicant: FUJIFILM CorporationInventor: Takashi YONEMOTO
-
Publication number: 20200341183Abstract: The backlight unit includes: a light guide that includes an incidence surface and an emission surface facing each other; and a light source portion including a plurality of point light sources that are two-dimensionally arranged to face the incidence surface of the light guide, in which light emitted from the light source portion is incident into the incidence surface of the light guide and emitted from the emission surface, the backlight unit is driven by local dimming in which at least two point light sources among the plurality of point light sources are used as a minimum point lighting unit, the light guide includes a plurality of light advancing direction conversion portions and a plurality of light extraction portions, each of the light advancing direction conversion portions is provided at each of positions on the incidence surface facing the plurality of point light sources and changes an advancing direction of each of light components to a direction in which the light component is guided in the lightType: ApplicationFiled: July 9, 2020Publication date: October 29, 2020Inventors: Takashi YONEMOTO, Hirofumi TOYAMA, Naoyoshi YAMADA
-
Publication number: 20200326590Abstract: 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.Type: ApplicationFiled: June 25, 2020Publication date: October 15, 2020Applicant: FUJIFILM CorporationInventors: Naoya SHIBATA, Naoya NISHIMURA, Wataru HOSHINO, Yuzo FUJIKI, Takashi YONEMOTO
-
Publication number: 20200310195Abstract: A wavelength conversion member suppresses peeling at an edge at cutting; and is used with a backlight unit and a liquid crystal display device. The wavelength conversion member includes a first substrate, a wavelength conversion layer, and a second substrate, in which each of the first and second substrates includes a support, a barrier layer, and an organic layer, where each of the barrier layers contains at least aluminum and phosphorus, each of the organic layers is formed of a composition containing a polymer A having a glass transition temperature of 50° C. or lower and a polymer B having an acryloyl or methacryloyl group in a molecule thereof, and the wavelength conversion layer is a layer in which at least one selected from the group consisting of a quantum dot, a phosphor particle, and a phosphor coloring agent is dispersed in a matrix made of an acrylic resin.Type: ApplicationFiled: June 16, 2020Publication date: October 1, 2020Applicant: FUJIFILM CorporationInventors: Akiko WATANO, Tatsuya OBA, Hirofumi TOYAMA, Takashi YONEMOTO
-
Patent number: 10781369Abstract: 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 ?m.Type: GrantFiled: May 30, 2019Date of Patent: September 22, 2020Assignee: FUJIFILM CorporationInventor: Takashi Yonemoto
-
Publication number: 20200050009Abstract: An optical film includes a cholesteric liquid crystal layer formed in a stripe-shaped pattern in which an optically anisotropic region having optical anisotropy and an optically isotropic region having optical isotropy are alternately disposed, a helical axis of a cholesteric liquid crystal in the optically anisotropic region is oriented in one axial direction tin a plane of the optical film, and the helical axis is oriented in a normal direction t of a boundary surface between the optically anisotropic region and the optically isotropic region.Type: ApplicationFiled: October 16, 2019Publication date: February 13, 2020Applicant: FUJIFILM CorporationInventors: Yukito SAITOH, Daisuke KASHIWAGI, Hirofumi TOYAMA, Naoyoshi YAMADA, Takashi YONEMOTO, Eiichiro AMINAKA