Patents by Inventor Daisuke Kashiwagi
Daisuke Kashiwagi 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: 10854852Abstract: The present invention provides an organic EL image display device including a light emitting element substrate, and a circularly polarizing plate, in which the light emitting element substrate includes a reflecting layer and an organic electroluminescent layer on the reflecting layer, the reflecting layer, the organic electroluminescent layer, and the circularly polarizing plate are arranged in this order, a polarization separation layer is provided between the organic electroluminescent layer and the circularly polarizing plate, the polarization separation layer includes a polarization separation region that reflects light of one polarization state in light emitted from the organic electroluminescent layer, and transmits light of another polarization state, and a visible light transmission region, the polarization separation region is formed of a layer formed by immobilizing a cholesteric liquid crystalline phase, and a positive C region-containing layer is provided between the organic electroluminescent layType: GrantFiled: November 8, 2019Date of Patent: December 1, 2020Assignee: FUJIFILM CorporationInventors: Ayako Muramatsu, Daisuke Kashiwagi, Shinichi Yoshinari, Kunihiro Atsumi, Ryoji Goto
-
Publication number: 20200264357Abstract: An object of the present invention is to provide is an optical laminate film exhibiting excellent uniformity in reflection tint and an organic EL display device using this optical laminate film and exhibiting excellent uniformity in reflection tint when turned off.Type: ApplicationFiled: May 5, 2020Publication date: August 20, 2020Applicant: FUJIFILM CorporationInventors: Shinichi YOSHINARI, Ayako MURAMATSU, Naoya SHIBATA, Kunihiro ATSUMI, Daisuke KASHIWAGI
-
Publication number: 20200264475Abstract: An object of the present invention is to provide is an optical laminate film exhibiting excellent reflection tint and an organic EL display device using this optical laminate film and exhibiting excellent reflection tint when turned off. The object is achieved by providing an optical laminate film including a polarizer, a phase difference layer, and a circularly polarized light separating layer in this order, in which an in-plane retardation Re(550) of the phase difference layer is 120 to 160 nm, the polarizer and the phase difference layer are arranged to form an angle of 45°±10°, the circularly polarized light separating layer is a cholesteric liquid crystal layer formed by fixing a cholesteric liquid crystalline phase and having a liquid crystalline molecule as a main component, and Re(550) is 0.5 to 3.Type: ApplicationFiled: May 4, 2020Publication date: August 20, 2020Applicant: FUJIFILM CorporationInventors: Shinichi YOSHINARI, Ayako MURAMATSU, Naoya SHIBATA, Kunihiro ATSUMI, Daisuke KASHIWAGI
-
Patent number: 10620479Abstract: The optical film is an optical film including a cholesteric liquid crystal layer, in which first regions having a first film thickness and second regions having a second film thickness which is smaller than the first film thickness are alternately arranged with a period P of 0.5 ?m to 2.0 ?m in at least one direction in a plane, a difference in film thickness between the first film thickness and the second film thickness is in a range of 0.2 ?m to 1.0 ?m, and a helical pitch of a cholesteric phase in the first region is different from a helical pitch of a cholesteric phase in the second region.Type: GrantFiled: June 26, 2019Date of Patent: April 14, 2020Assignee: FUJIFILM CorporationInventors: Yukito Saitoh, Daisuke Kashiwagi
-
Patent number: 10613262Abstract: An optical laminate includes a wavelength selective reflective element which is provided with a reflection layer selectively reflecting light in a specific reflection wavelength region, and an absolute phase adjustment layer which is provided on at least one surface side of the wavelength selective reflective element and has optical isotropy, and the absolute phase adjustment layer has an in-plane distribution of at least one of a refractive index or a film thickness, and thus has an in-plane distribution of an optical path length in a film thickness direction.Type: GrantFiled: January 21, 2019Date of Patent: April 7, 2020Assignee: FUJIFILM CORPORATIONInventors: Yukito Saitoh, Daisuke Kashiwagi
-
Patent number: 10585223Abstract: Provided is a depolarizing film including a depolarizing layer composed of a first region and a second region having differing optical characteristics, wherein in the depolarizing layer, the ratio between the area of the first region and the area of the second region is 0.45:0.55 to 0.55:0.45, the first region is an optically anisotropic region causing 90° optical rotation of light that is incident on one surface of the depolarizing layer before the light is emitted from the other surface, and the second region is an optically isotropic region having optical isotropy.Type: GrantFiled: August 21, 2019Date of Patent: March 10, 2020Assignee: FUJIFILM CorporationInventors: Yukito Saitoh, Daisuke Kashiwagi, Ayako Muramatsu, Yujiro Yanai, Hideki Kaneiwa
-
Publication number: 20200075896Abstract: The present invention provides an organic EL image display device including a light emitting element substrate, and a circularly polarizing plate, in which the light emitting element substrate includes a reflecting layer and an organic electroluminescent layer on the reflecting layer, the reflecting layer, the organic electroluminescent layer, and the circularly polarizing plate are arranged in this order, a polarization separation layer is provided between the organic electroluminescent layer and the circularly polarizing plate, the polarization separation layer includes a polarization separation region that reflects light of one polarization state in light emitted from the organic electroluminescent layer, and transmits light of another polarization state, and a visible light transmission region, the polarization separation region is formed of a layer formed by immobilizing a cholesteric liquid crystalline phase, and a positive C region-containing layer is provided between the organic electroluminescent layType: ApplicationFiled: November 8, 2019Publication date: March 5, 2020Applicant: FUJIFILM CorporationInventors: Ayako MURAMATSU, Daisuke KASHIWAGI, Shinichi YOSHINARI, Kunihiro ATSUMI, Ryoji GOTO
-
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
-
Patent number: 10544768Abstract: A pulsation damper for a fuel pump having a pump body in which a fuel passage is defined includes: a diaphragm that is elastically deformed in a predetermined direction by receiving a pressure of fuel; a casing part including a housing chamber that houses the diaphragm; and an attachment to be attached to the pump body. The attachment includes a communication passage that makes the housing chamber to communicate with the fuel passage. The attachment has a length in a perpendicular direction perpendicular to the predetermined direction, and the length of the attachment is smaller than a length of the casing part in the perpendicular direction.Type: GrantFiled: March 8, 2018Date of Patent: January 28, 2020Assignee: DENSO CORPORATIONInventor: Daisuke Kashiwagi
-
Publication number: 20200020889Abstract: An organic EL image display device that includes a light emitting element substrate; and a circularly polarizing plate. The light emitting element substrate includes a reflecting layer and an organic electroluminescent layer group arranged in a matrix form on the reflecting layer. The reflecting layer, the organic electroluminescent layer group, and the circularly polarizing plate are arranged in this order. A polarization separation layer is provided between the organic electroluminescent layer group and the circularly polarizing plate, and includes polarization separation sites arranged in a matrix form corresponding to the organic electroluminescent layer group. The polarization separation site reflects light of one polarization state and transmits light of the other polarization state in light emitted from the corresponding organic electroluminescent layer. The polarization separation site is divided by a visible light transmission region.Type: ApplicationFiled: September 26, 2019Publication date: January 16, 2020Applicant: FUJIFILM CorporationInventors: Ayako MURAMATSU, Daisuke KASHIWAGI, Shinichi YOSHINARI, Ryoji GOTO
-
Publication number: 20200020888Abstract: The present invention provides an organic EL image display device including a reflecting layer, an organic electroluminescent layer group, a polarization separation layer, and a circularly polarizing plate in this order, in which the polarization separation layer includes polarization separation sites arranged in a matrix form corresponding to the organic electroluminescent layer group, the polarization separation site reflects light of one polarization state and transmits light of the other polarization state in light emitted from the corresponding organic electroluminescent layer, the polarization separation layer is divided by a visible light transmission region to form the polarization separation sites, and a wavelength range of the reflection is wider than a wavelength range of the light emission. The organic EL image display device according to the present invention has high brightness at the time of both front observation and oblique observation and little image blurring.Type: ApplicationFiled: September 26, 2019Publication date: January 16, 2020Applicant: FUJIFILM CorporationInventors: Daisuke KASHIWAGI, Rikio INOUE
-
Publication number: 20190377117Abstract: Provided is a depolarizing film including a depolarizing layer composed of a first region and a second region having differing optical characteristics, wherein in the depolarizing layer, the ratio between the area of the first region and the area of the second region is 0.45:0.55 to 0.55:0.45, the first region is an optically anisotropic region causing 90° optical rotation of light that is incident on one surface of the depolarizing layer before the light is emitted from the other surface, and the second region is an optically isotropic region having optical isotropy.Type: ApplicationFiled: August 21, 2019Publication date: December 12, 2019Applicant: FUJIFILM CorporationInventors: Yukito SAITOH, Daisuke KASHIWAGI, Ayako MURAMATSU, Yujiro YANAI, Hideki KANEIWA
-
Publication number: 20190353956Abstract: Provided is an organic EL display device in which blue brightness is improved, and an antireflection function in an oblique direction is enhanced. The problem is solved by ensuring that a polarizer, a phase difference layer, a circularly polarized light separating layer, and a light emitting element are provided from a viewing side, an in-plane retardation Re(550) of the phase difference layer is set to 100 to 160 nm, the circularly polarized light separating layer is a cholesteric liquid crystal layer having a selective reflection center wavelength in a range of 425 to 475 nm, and a sum of retardations Rth(550) in a thickness direction of members arranged between the polarizer and the light emitting element is set to ?50 to 50 nm.Type: ApplicationFiled: August 1, 2019Publication date: November 21, 2019Applicant: FUJIFILM CorporationInventors: Yujiro YANAI, Hideki KANEIWA, Nobuyuki AKUTAGAWA, Daisuke KASHIWAGI
-
Patent number: 10459132Abstract: An optical member includes: a substrate; and a dot formed on a surface of the substrate. The dot has wavelength selective reflecting properties, and a cholesteric structure which has a stripe pattern including bright and dark portions in a cross-sectional view of the dot when observed with a scanning electron microscope. A surface shape of the dot opposite to the substrate in a cross-section of the dot in a thickness direction has at least one inflection point. In the cross-section, an angle between a normal line perpendicular to a line, formed using a first dark portion from a surface of the dot opposite to the substrate, and the surface of the dot, is in a range of 70° to 90°. A proportion of a retroreflective area of the optical member is high when observed after light irradiation from an oblique direction to a normal direction perpendicular to the optical member.Type: GrantFiled: September 14, 2017Date of Patent: October 29, 2019Assignee: FUJIFILM CorporationInventors: Akira Yamamoto, Yoji Ito, Michio Nagai, Daisuke Kashiwagi, Nobuhiko Ichihara
-
Publication number: 20190317352Abstract: The optical film is an optical film including a cholesteric liquid crystal layer, in which first regions having a first film thickness and second regions having a second film thickness which is smaller than the first film thickness are alternately arranged with a period P of 0.5 ?m to 2.0 ?m in at least one direction in a plane, a difference in film thickness between the first film thickness and the second film thickness is in a range of 0.2 ?m to 1.0 ?m, and a helical pitch of a cholesteric phase in the first region is different from a helical pitch of a cholesteric phase in the second region.Type: ApplicationFiled: June 26, 2019Publication date: October 17, 2019Applicant: FUJIFILM CorporationInventors: Yukito SAITOH, Daisuke KASHIWAGI
-
Patent number: 10386569Abstract: Provided is an optical member having a high brightness, a low haze, and a small color change, an optical element, a liquid crystal display device, and a near-to-eye optical member.Type: GrantFiled: August 9, 2017Date of Patent: August 20, 2019Assignee: FUJIFILM CorporationInventors: Yujiro Yanai, Yukito Saitoh, Akira Yamamoto, Nobuhiko Ichihara, Daisuke Kashiwagi, Michio Nagai
-
Patent number: 10353247Abstract: An optical member having a base and an underlayer with a region A of surface energy AE and a region B of surface energy BE (BE-AE>0 mN/m), in which a dot of a wavelength-selective reflective cholesteric structure is disposed on the region B, has high pattern position accuracy for the patterns formed with the dots.Type: GrantFiled: February 16, 2016Date of Patent: July 16, 2019Assignee: FUJIFILM CorporationInventors: Nobuhiko Ichihara, Yoji Ito, Michio Nagai, Daisuke Kashiwagi, Akira Yamamoto
-
Publication number: 20190204614Abstract: An optical laminate includes a cholesteric liquid crystal layer and a lenticular lens which is laminated on the cholesteric liquid crystal layer, the cholesteric liquid crystal layer has a plurality of regions which are arranged in a pattern in an arrangement direction of lenses of the lenticular lens and are different from each other in terms of the reflection center wavelength for front incident light, and among the plurality of regions, a region having the shortest reflection center wavelength is disposed at a focus position of the lenticular lens for the front incident light, and among the plurality of regions, a region having a longer reflection center wavelength is disposed further away from the focus position.Type: ApplicationFiled: March 11, 2019Publication date: July 4, 2019Inventors: Yukito SAITOH, Kunihiro ATSUMI, Naoyoshi YAMADA, Daisuke KASHIWAGI, Shigeaki NIMURA, Mitsuyoshi ICHIHASHI, Rie TAKASAGO
-
Patent number: 10338289Abstract: Provided is an optical member including: a substrate; and a dot that is in contact with a surface of the substrate, in which the dot is formed of a liquid crystal material having a cholesteric structure, four or more dots form one recognition effective region as an aggregate, and a shortest inter-end distance between one arbitrary dot and at least two other dots in the recognition effective region is 10 ?m or less. in the optical member, even when a dot pattern is observed in an oblique direction, retroreflection properties are exhibited and the intensity of reflected light is high. By using the optical member according to the present invention, an image display device having a high data input sensitivity can be provided.Type: GrantFiled: June 7, 2017Date of Patent: July 2, 2019Assignee: FUJIFILM CorporationInventors: Daisuke Kashiwagi, Yoji Ito, Michio Nagai, Akira Yamamoto, Nobuhiko Ichihara, Hideyuki Nakamura
-
Publication number: 20190170919Abstract: An optical laminate includes a wavelength selective reflective element which is provided with a reflection layer selectively reflecting light in a specific reflection wavelength region, and an absolute phase adjustment layer which is provided on at least one surface side of the wavelength selective reflective element and has optical isotropy, and the absolute phase adjustment layer has an in-plane distribution of at least one of a refractive index or a film thickness, and thus has an in-plane distribution of an optical path length in a film thickness direction.Type: ApplicationFiled: January 21, 2019Publication date: June 6, 2019Inventors: Yukito SAITOH, Daisuke KASHIWAGI