Patents by Inventor Hirofumi Toyama
Hirofumi Toyama 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).
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Patent number: 11914172Abstract: 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: GrantFiled: July 15, 2021Date of Patent: February 27, 2024Assignee: FUJIFILM CorporationInventors: Hirofumi Toyama, Tatsuya Oba, Takashi Yonemoto
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Publication number: 20230400694Abstract: Provided is a virtual image display device where a scenery and a video can be displayed to be superimposed on each other and a field of view is wide. The virtual image display device includes: a transparent display; and an optical system that is disposed on a visible side with respect to the transparent display, in which the optical system includes a half mirror and a reflective polarizer, and at least one of the half mirror or the reflective polarizer has an action of a concave mirror.Type: ApplicationFiled: August 21, 2023Publication date: December 14, 2023Applicant: FUJIFILM CorporationInventors: Naoyoshi YAMADA, Hirofumi TOYAMA, Yukito SAITOH
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Patent number: 11740506Abstract: 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: GrantFiled: June 16, 2020Date of Patent: August 29, 2023Assignee: FUJIFILM CorporationInventors: Akiko Watano, Tatsuya Oba, Hirofumi Toyama, Takashi Yonemoto
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Publication number: 20230096684Abstract: Provided is a polymerizable composition including a quantum dot, a polyfunctional thiol, a first (meth)acrylate, and a second (meth)acrylate, in which the first (meth)acrylate is a polyfunctional (meth)acrylate, the second (meth)acrylate is a mono- or higher functional (meth)acrylate having a functional group selected from the group consisting of a carboxy group, a hydroxy group, a phosphate group, and an amino group, and a molecular weight of the second (meth)acrylate is equal to or less than a molecular weight of the polyfunctional thiol.Type: ApplicationFiled: October 27, 2022Publication date: March 30, 2023Applicant: FUJIFILM CorporationInventors: Natsuru CHIKUSHI, Tatsuya OBA, Hirofumi TOYAMA
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Publication number: 20230088475Abstract: Provided is a polymerizable composition including a quantum dot, a polyfunctional thiol, a polyfunctional (meth)acrylate, and a phenolic compound.Type: ApplicationFiled: October 27, 2022Publication date: March 23, 2023Applicant: FUJIFILM CorporationInventors: Natsuru CHIKUSHI, Tatsuya OBA, Hirofumi TOYAMA
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Patent number: 11549054Abstract: Provided is an organic electroluminescent display device that further suppresses reflection of external light when viewed in an oblique direction; a phase difference film; and a circularly polarizing plate. This display device has an organic electroluminescent display panel, and a circularly polarizing plate arranged on the display panel, in which the circularly polarizing plate has a polarizer and a phase difference film, the phase difference film has, from a side of the polarizer, a negative A-plate, and a positive A-plate, the in-plane retardation of the negative A-plate at a wavelength of 550 nm is more than 50 nm and less than 90 nm, and the in-plane retardation of the positive A-plate at a wavelength of 550 nm is 100 to 200 nm, and the angle formed by the in-plane slow axis of the negative A-plate and the in-plane slow axis of the positive A-plate is 45°±10°.Type: GrantFiled: October 2, 2019Date of Patent: January 10, 2023Assignee: FUJIFILM CorporationInventors: Akiko Watano, Tatsuya Oba, Hirofumi Toyama
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Publication number: 20220326562Abstract: The present disclosure provides a transparent screen including two main surfaces, and out of light of which a wavelength incident on one main surface out of the two main surfaces is 532 nm, a half width of a peak observed in a distribution indicating strength with respect to a diffraction angle of a primary diffraction light emitted from the other main surface out of the two main surfaces is 2 degrees or greater.Type: ApplicationFiled: June 23, 2022Publication date: October 13, 2022Applicant: FUJIFILM CorporationInventors: Takahiro HAYASHI, Mitsuyoshi ICHIHASHI, Satoshi KUNIYASU, Hirofumi TOYAMA
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Publication number: 20220214483Abstract: Provided is a new optical element that can be used for various applications. The optical element includes a liquid crystal layer where alignment of a liquid crystal compound is immobilized and a film thickness distribution satisfies 1.1<(In-Plane Maximum Value/In-Plane Minimum Value)<100.Type: ApplicationFiled: March 22, 2022Publication date: July 7, 2022Applicant: FUJIFILM CorporationInventors: Nobuhiko ICHIHARA, Hirofumi TOYAMA
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Publication number: 20220214576Abstract: Provided is a new optical element that can be used for various applications. The optical element includes: a liquid crystal layer where a liquid crystal compound is aligned; and a polymer layer that is laminated on the liquid crystal layer, in which the optical element is reversibly switchable between a reference form and a first form where a film thickness distribution of the liquid crystal layer is less than that of the reference form.Type: ApplicationFiled: March 22, 2022Publication date: July 7, 2022Applicant: FUJIFILM CorporationInventors: Nobuhiko ICHIHARA, Hirofumi TOYAMA
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Publication number: 20220109128Abstract: There are provided a wavelength selective absorption filter including a resin, and four types of dyes A to D each having a main absorption wavelength range in different specific wavelength regions, in which an absorbance Ab (?) of the wavelength selective absorption filter at a wavelength ? nm satisfies specific Relational Expressions (I) to (VI), and an organic electroluminescent display device.Type: ApplicationFiled: December 13, 2021Publication date: April 7, 2022Applicant: FUJIFILM CorporationInventors: Nobutaka FUKAGAWA, Hirofumi TOYAMA, Daisuke SASAKI, Yoshihiro JIMBO
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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
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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
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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
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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
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Patent number: 10948767Abstract: A phosphor-containing film suppresses deterioration of a phosphor and generation of luminescent spots and the reduction in luminance, and a backlight unit. The phosphor-containing film includes: a phosphor-containing layer having a resin layer which has oxygen impermeability and discrete concave portions, and fluorescent regions arranged in the concave portions, and a first substrate film laminated on one surface of the phosphor-containing layer and a second substrate film laminated on the opposing surface, in which the fluorescent regions contain the phosphor that deteriorates through a reaction with oxygen, and a binder, the first substrate film includes a support film and an inorganic layer provided on a surface of the support film on a side facing the phosphor-containing layer, the resin layer has a modulus of elasticity of 0.5 to 10 GPa, and a thickness of the bottom of the concave portion of the resin layer is 0.1 to 20 ?m.Type: GrantFiled: May 2, 2019Date of Patent: March 16, 2021Assignee: FUJIFILM CorporationInventors: Tatsuya Oba, Hirofumi Toyama, Kenichi Kakishita
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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
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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
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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
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Publication number: 20200032137Abstract: Provided is an organic electroluminescent display device that further suppresses reflection of external light when viewed in an oblique direction; a phase difference film; and a circularly polarizing plate. This display device has an organic electroluminescent display panel, and a circularly polarizing plate arranged on the display panel, in which the circularly polarizing plate has a polarizer and a phase difference film, the phase difference film has, from a side of the polarizer, a negative A-plate, and a positive A-plate, the in-plane retardation of the negative A-plate at a wavelength of 550 nm is more than 50 nm and less than 90 nm, and the in-plane retardation of the positive A-plate at a wavelength of 550 nm is 100 to 200 nm, and the angle formed by the in-plane slow axis of the negative A-plate and the in-plane slow axis of the positive A-plate is 45°±10°.Type: ApplicationFiled: October 2, 2019Publication date: January 30, 2020Applicant: FUJIFILM CorporationInventors: Akiko WATANO, Tatsuya OBA, Hirofumi TOYAMA
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Publication number: 20190369409Abstract: 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: ApplicationFiled: August 14, 2019Publication date: December 5, 2019Applicant: FUJIFILM CorporationInventors: Naoyoshi YAMADA, Takashi YONEMOTO, Hirofumi TOYAMA, Yukito SAITOH