Patents by Inventor Megumi SEKIGUCHI
Megumi SEKIGUCHI 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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Publication number: 20240019810Abstract: An object of the present invention is to provide an image display device capable of easily detecting an eye gaze. The object is achieved by providing an image display optical system; an infrared light source that irradiates an eyeball of a user with infrared light; a hologram element that transmits infrared light emitted by the infrared light source and reflected by the eyeball of the user; and an infrared light image sensor that images infrared light transmitted through the hologram element, in which the hologram element acts on infrared light without acting on visible light and emits reproduced infrared light with an intensity distribution in a plane direction corresponding to an eye gaze of the user.Type: ApplicationFiled: September 28, 2023Publication date: January 18, 2024Applicant: FUJIFILM CorporationInventors: Megumi SEKIGUCHI, Naoyoshi YAMADA, Takehiro KASAHARA, Yukito SAITOH, Ryoji HIMENO, Makoto KAMO
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Publication number: 20240021012Abstract: A fingerprint recognition sensor having an excellent S/N ratio and capable of realizing thinning and an optical element including the fingerprint recognition sensor. The fingerprint recognition sensor includes a light-receiving element; and an optical element including a near infrared absorbing dichroic substance, in which a fingerprint reading surface is positioned on a side of the optical element opposite to the light-receiving element side. The optical element has an absorption axis with respect to near infrared light in an in-plane direction. When linearly polarized light of near infrared light orthogonal to the absorption axis is radiated from a normal direction of the optical element and from a direction inclined by 45° from the normal direction at an azimuthal angle orthogonal to the absorption axis, an absorbance during the radiation from the direction inclined by 45° from the normal direction is more than an absorbance during the radiation from the normal direction.Type: ApplicationFiled: September 26, 2023Publication date: January 18, 2024Applicant: FUJIFILM CorporationInventors: Ryoji HIMENO, Shinichi MORISHIMA, Yuki HIRAI, Makoto KAMO, Megumi SEKIGUCHI
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Publication number: 20240004465Abstract: An object is to provide an eye gaze tracking system capable of easily detecting an eye gaze, and a virtual image display device using the same. The object is achieved by providing an infrared light source array, a virtual image generation optical system, and an infrared light detector, and by sequentially turning on infrared light sources of the infrared light source array, collimating rays of infrared light through the virtual image generation optical system, making the collimated rays of infrared light incident on a user's eye at different angles, respectively, and detecting, among the rays of infrared light incident on the eye, a ray of infrared light incident on a retina through a pupil and reflected by the retina through the infrared light detector.Type: ApplicationFiled: September 14, 2023Publication date: January 4, 2024Applicant: FUJIFILM CorporationInventors: Naoyoshi YAMADA, Megumi SEKIGUCHI
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Patent number: 11243343Abstract: Display performance can be improved by reducing light leak in an oblique direction at the time of black display while increasing front brightness.Type: GrantFiled: March 3, 2020Date of Patent: February 8, 2022Assignee: FUJIFILM CorporationInventors: Shinya Watanabe, Megumi Sekiguchi, Yujiro Yanai, Naoyoshi Yamada, Yukito Saitoh
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Publication number: 20210388258Abstract: A phosphor-containing film including a phosphor such as a quantum dot and is capable of suppressing the deterioration of the phosphor even where the film is formed into a laminated structure; and a backlight unit including the phosphor-containing film as a wavelength converting member. The film includes a phosphor-containing layer in which a plurality of fluorescent regions, each of which contains a phosphor that deteriorates through reaction with oxygen when exposed to oxygen, are discretely arranged and a resin layer having impermeability to oxygen is arranged among the plurality of the discretely arranged fluorescent regions; and a first substrate film and a second substrate film, which are respectively laminated on the both main surfaces of the phosphor-containing layer, in which the resin layer has a Knoop hardness of 115 N/mm2 to 285 N/mm2, a creep recovery rate of 22% or less, and an elastic recovery rate of 60% or more.Type: ApplicationFiled: August 27, 2021Publication date: December 16, 2021Applicant: FUJIFILM CorporationInventors: Megumi SEKIGUCHI, Tatsuya OBA, Kenichi KAKISHITA, Masayuki KUSUMOTO, Natsuru CHIKUSHI
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Patent number: 11136496Abstract: A phosphor-containing film contains a phosphor such as a quantum dot and is capable of suppressing deterioration of phosphor even where the film is formed into a laminated structure; and a backlight unit including the phosphor-containing film as a wavelength converting member. The film includes: a phosphor-containing layer in which a plurality of fluorescent regions, each of which contains a phosphor that deteriorates through reaction with oxygen when exposed to oxygen, are discretely arranged and a resin layer having impermeability to oxygen is arranged among the plurality of the discretely arranged fluorescent regions; and a first substrate film and a second substrate film, which are respectively laminated on both main surfaces of the phosphor-containing layer, in which the resin layer has a Knoop hardness of 115 N/mm2 to 285 N/mm2, a creep recovery rate of 22% or less, and an elastic recovery rate of 60% or more.Type: GrantFiled: February 27, 2019Date of Patent: October 5, 2021Assignee: FUJIFILM CorporationInventors: Megumi Sekiguchi, Tatsuya Oba, Kenichi Kakishita, Masayuki Kusumoto, Natsuru Chikushi
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Patent number: 11016240Abstract: A light guide film that is bendable, has a strong resistance to impact, and can perform the adjustment of the brightness per region, and a backlight unit. The light guide film includes a plurality of optical units each of which includes a light guide portion and an emission portion; and a resin portion that is filled between the optical units adjacent to each other, in which the light guide portion guides light incident from a light source to the emission portion, the emission portion emits light guided and incident from the light guide portion from a light emission surface, the plurality of optical units are arranged in a plane direction of the light emission surfaces such that the light emission surfaces of the emission portions are parallel to each other, and the light guide portions and the emission portions are arranged in the plane direction of the light emission surfaces.Type: GrantFiled: August 19, 2019Date of Patent: May 25, 2021Assignee: FUJIFILM CorporationInventors: Megumi Sekiguchi, Naoyoshi Yamada
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Patent number: 10982135Abstract: A phosphor-containing film capable of suppressing deterioration of phosphor and capable of suppressing generation of luminescent spots and the reduction in luminance due to a defect of the resin layer. The film includes: a phosphor-containing layer having a resin layer which has impermeability to oxygen and is provided with a plurality of discretely arranged concave portions, and a plurality of fluorescent regions, each of which is arranged in the concave portion of the resin layer and contains a phosphor that deteriorates through a reaction with oxygen when exposed to oxygen; and a first substrate film and a second substrate film, which are respectively laminated on one main surface and the other main surface of the phosphor-containing layer, in which the fluorescent regions contain a binder and quantum dots serving as the phosphor.Type: GrantFiled: February 28, 2019Date of Patent: April 20, 2021Assignee: FUJIFILM CorporationInventors: Tatsuya Oba, Natsuru Chikushi, Kenichi Kakishita, Masayuki Kusumoto, Ryo Satake, Megumi Sekiguchi
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Publication number: 20200292878Abstract: A louver film, a planar light source device, and a liquid crystal display device enables further improvement of directivity for visibility while light use efficiency is maintained and also enable improvement of viewing angle contrast and halo. The louver film includes a plurality of lenses which are arranged at a constant pitch on an emission side of a light source; a first support disposed on a side closer to the light source than the lenses and has a thickness greater than or equal to the pitch of the lenses and a refractive index of 1.5 or greater; and a light reflecting layer disposed on a side closer to the light source than the first support and has a reflectivity of 90% or greater and openings on optical axes of the plurality of lenses, and the opening ratio of each opening is in a range of 30% to 70%.Type: ApplicationFiled: May 28, 2020Publication date: September 17, 2020Applicant: FUJIFILM CorporationInventors: Megumi SEKIGUCHI, Takashi TAMADA, Shinya WATANABE
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Publication number: 20200200961Abstract: Display performance can be improved by reducing light leak in an oblique direction at the time of black display while increasing front brightness.Type: ApplicationFiled: March 3, 2020Publication date: June 25, 2020Applicant: FUJIFILM CorporationInventors: Shinya WATANABE, Megumi SEKIGUCHI, Yujiro YANAI, Naoyoshi YAMADA, Yukito SAITOH
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Publication number: 20190383992Abstract: A light guide film that is bendable, has a strong resistance to impact, and can perform the adjustment of the brightness per region, and a backlight unit. The light guide film includes a plurality of optical units each of which includes a light guide portion and an emission portion; and a resin portion that is filled between the optical units adjacent to each other, in which the light guide portion guides light incident from a light source to the emission portion, the emission portion emits light guided and incident from the light guide portion from a light emission surface, the plurality of optical units are arranged in a plane direction of the light emission surfaces such that the light emission surfaces of the emission portions are parallel to each other, and the light guide portions and the emission portions are arranged in the plane direction of the light emission surfaces.Type: ApplicationFiled: August 19, 2019Publication date: December 19, 2019Applicant: FUJIFILM CorporationInventors: Megumi SEKIGUCHI, Naoyoshi YAMADA
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Patent number: 10393926Abstract: Disclosed is an optical conversion member, including an optical conversion layer containing quantum dot emitting fluorescent light and an anisotropic light scattering layer having I (0°)/I (40°) of 3 or greater, in which I (0°) indicates a transmission light intensity of the anisotropic light scattering layer at the time of allowing light to be incident on the anisotropic light scattering layer from a normal direction of a surface of the anisotropic light scattering layer, and I (40°) indicates a transmission light intensity of the anisotropic light scattering layer in an azimuth in which a transmission light intensity of the anisotropic light scattering layer at the time of allowing light to be incident on the anisotropic light scattering layer from a direction of a tilt angle of 40° with respect to the normal direction of the surface of the anisotropic light scattering layer becomes a minimum value.Type: GrantFiled: September 28, 2016Date of Patent: August 27, 2019Assignee: FUJIFILM CorporationInventors: Takashi Yonemoto, Yukito Saitoh, Megumi Sekiguchi
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Publication number: 20190194531Abstract: A phosphor-containing film capable of suppressing deterioration of phosphor and capable of suppressing generation of luminescent spots and the reduction in luminance due to a defect of the resin layer. The film includes: a phosphor-containing layer having a resin layer which has impermeability to oxygen and is provided with a plurality of discretely arranged concave portions, and a plurality of fluorescent regions, each of which is arranged in the concave portion of the resin layer and contains a phosphor that deteriorates through a reaction with oxygen when exposed to oxygen; and a first substrate film and a second substrate film, which are respectively laminated on one main surface and the other main surface of the phosphor-containing layer, in which the fluorescent regions contain a binder and quantum dots serving as the phosphor.Type: ApplicationFiled: February 28, 2019Publication date: June 27, 2019Applicant: FUJIFILM CorporationInventors: Tatsuya OBA, Natsuru CHIKUSHI, Kenichi KAKISHITA, Masayuki KUSUMOTO, Ryo SATAKE, Megumi SEKIGUCHI
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Publication number: 20190194530Abstract: A phosphor-containing film contains a phosphor such as a quantum dot and is capable of suppressing deterioration of phosphor even where the film is formed into a laminated structure; and a backlight unit including the phosphor-containing film as a wavelength converting member. The film includes: a phosphor-containing layer in which a plurality of fluorescent regions, each of which contains a phosphor that deteriorates through reaction with oxygen when exposed to oxygen, are discretely arranged and a resin layer having impermeability to oxygen is arranged among the plurality of the discretely arranged fluorescent regions; and a first substrate film and a second substrate film, which are respectively laminated on both main surfaces of the phosphor-containing layer, in which the resin layer has a Knoop hardness of 115 N/mm2 to 285 N/mm2, a creep recovery rate of 22% or less, and an elastic recovery rate of 60% or more.Type: ApplicationFiled: February 27, 2019Publication date: June 27, 2019Applicant: FUJIFILM CorporationInventors: Megumi SEKIGUCHI, Tatsuya OBA, Kenichi KAKISHITA, Masayuki KUSUMOTO, Natsuru CHIKUSHI
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Patent number: 9989675Abstract: A polarizing plate includes, in the following order, a pressure sensitive adhesive layer, a polarizer, and an outer side layer provided on a visible side rather than the polarizer side, the thickness of the outer side layer is >3 ?m and ?45 ?m, the storage elastic modulus of the adhesive layer after lamination is 0.1 MPa to 2.0 MPa, and a hardness ratio (X/Y) is less than 1, when in measuring the hardness of the outer side layer in a depth direction at intervals of 1.5 ?m from surface A thereof to a surface B on the polarizer side, the absolute value of the difference between an n-th and n+1 measured hardness (where n is an integer of 1 or more) is defined as the hardness difference (X), and the absolute value of the difference between the hardness of surface A and surface B is hardness difference (Y).Type: GrantFiled: March 28, 2016Date of Patent: June 5, 2018Assignee: FUJIFILM CorporationInventors: Ryo Satake, Megumi Sekiguchi
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Patent number: 9946110Abstract: There is provided a liquid crystal display including: a liquid crystal cell in which a liquid crystal layer is installed between two glass substrates; polarizing plates on both surfaces of the liquid crystal cell; and a backlight at a rear side of the liquid crystal cell, which is a non-visual side, wherein in a polarizing plate at a front side of the liquid crystal cell, which is a visual side, a difference in a moisture content of the polarizing plate at the front side under a specific condition in elapse of time is 0.01% or more and 3.0% or less.Type: GrantFiled: April 10, 2015Date of Patent: April 17, 2018Assignee: FUJIFILM CorporationInventors: Takashi Yonemoto, Hiromichi Furukawa, Takahiro Ohno, Megumi Sekiguchi, Mitsuo Osato, Kenichi Fukuda, Daiki Wakizaka
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Patent number: 9904099Abstract: A liquid crystal display device includes: a front-side polarizing plate having a front-side polarizer; a liquid crystal cell; and a rear-side polarizing plate having a rear-side polarizer in this order, in which a distance D1 from a central portion of the front-side polarizer to a central portion of the liquid crystal cell and a distance D2 from a central portion of the rear-side polarizer to the central portion of the liquid crystal cell are different from each other, in which a ratio between an X value, and the distance D1 and a Y value, and the distance D2 rear-side polarizer is in a range of 1±0.12, a distance T1 between the front-side polarizing plate and the liquid crystal cell is 40 ?m or more, and a distance T2 between the rear-side polarizing plate and the liquid crystal cell is in a range of 0 to 30 ?m.Type: GrantFiled: October 5, 2016Date of Patent: February 27, 2018Assignee: FUJIFILM CorporationInventors: Ryo Satake, Megumi Sekiguchi, Yoji Ito, Ryo Nakamura, Rikio Inoue
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Publication number: 20170162133Abstract: An aspect of the present invention relates to a backlight unit, including: a polarized light source unit which is capable of allowing polarized light to exit; and a condensing sheet which is disposed on the polarized light source unit on an exiting side, in which a depolarization degree of the condensing sheet is less than or equal to 0.1500, and a liquid crystal display device, including: the backlight unit; and a liquid crystal panel.Type: ApplicationFiled: February 16, 2017Publication date: June 8, 2017Applicant: FUJIFILM CorporationInventors: Megumi SEKIGUCHI, Makoto KAMO
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Patent number: 9645438Abstract: Provided is a liquid crystal display device including a liquid crystal cell having a liquid crystal layer between two glass substrates, a front-side polarizing plate provided on a front side of the liquid crystal cell, a rear polarizer provided on a rear side of the liquid crystal cell, and a backlight provided on a rear side of the rear polarizer, in which the front-side polarizing plate has a first protective film, a polarizer, and a second protective film in this order from a surface side opposite to the liquid crystal cell, the first protective film in the front-side polarizing plate is a film including a polyester resin or a polycarbonate resin as a main component, an Re of the first protective film is 3000 nm or higher, an equilibrium moisture content of the second protective film at 25° C. and a relative humidity of 60% is in a range of 1% to 3%, and in the second protective film, a contractile force in a direction orthogonal to an absorption axis of the polarizer is 1.Type: GrantFiled: October 28, 2015Date of Patent: May 9, 2017Assignee: FUJIFILM CorporationInventors: Megumi Sekiguchi, Hiromichi Furukawa, Naoyoshi Yamada
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Publication number: 20170023825Abstract: A liquid crystal display device includes: a front-side polarizing plate having a front-side polarizer; a liquid crystal cell; and a rear-side polarizing plate having a rear-side polarizer in this order, in which a distance D1 from a central portion of the front-side polarizer to a central portion of the liquid crystal cell and a distance D2 from a central portion of the rear-side polarizer to the central portion of the liquid crystal cell are different from each other, in which a ratio between an X value, and the distance D1 and a Y value, and the distance D2 rear-side polarizer is in a range of 1±0.12, a distance T1 between the front-side polarizing plate and the liquid crystal cell is 40 ?m or more, and a distance T2 between the rear-side polarizing plate and the liquid crystal cell is in a range of 0 to 30 ?m.Type: ApplicationFiled: October 5, 2016Publication date: January 26, 2017Applicant: FUJIFILM CorporationInventors: Ryo SATAKE, Megumi SEKIGUCHI, Yoji ITO, Ryo NAKAMURA, Rikio INOUE