Patents by Inventor Naoji Nada
Naoji Nada 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: 9302432Abstract: A color converting member is capable of suppressing deterioration in a phosphor by a simple manufacturing process. A method of manufacturing a color converting member includes a process of molding a resin material into a shape. In the process, molding the resin material and the phosphor integrally into a shape is performed, after kneading a phosphor that converts one color light to another color light into the resin material.Type: GrantFiled: April 16, 2013Date of Patent: April 5, 2016Assignee: DEXERIALS CORPORATIONInventors: Tsubasa Tsukahara, Yasushi Ito, Naoji Nada, Yoshihiro Oshima, Hideya Chubachi
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Publication number: 20150330604Abstract: An optical member includes a plate like light diffusion member having a light incidence surface and a light emitting surface opposed each other, a phosphor layer provided directly on the light emitting surface of the light diffusion member and containing a phosphor that converts a color light to another color light, and a protection layer formed on a surface on the side opposite to the light diffusion member, of the phosphor layer. A moisture vapor transmission rate of the light diffusion member is 2 g/m2/day or less.Type: ApplicationFiled: July 27, 2015Publication date: November 19, 2015Inventors: Tsubasa TSUKAHARA, Ryo KASEGAWA, Yasushi ITO, Naoji NADA
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Patent number: 9122093Abstract: An optical member realizing suppressed occurrence of a light loss between a phosphor layer performing color conversion and itself, and a display device using the same is provided. The optical member includes a base member having two opposed surfaces, and a phosphor layer provided integrally with one surface of the base member and containing a phosphor that converts a color light to another color light.Type: GrantFiled: January 14, 2010Date of Patent: September 1, 2015Assignee: DEXERIALS CORPORATIONInventors: Tsubasa Tsukahara, Ryo Kasegawa, Yasushi Ito, Naoji Nada
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Color converting member, method of manufacturing the same, light emitting device, and display device
Patent number: 9001288Abstract: A color converting member is capable of suppressing deterioration in a phosphor by a simple manufacturing process. A method of manufacturing a color converting member includes a process of molding a resin material into a shape. In the process, molding the resin material and the phosphor integrally into a shape is performed, after kneading a phosphor that converts one color light to another color light into the resin material.Type: GrantFiled: January 20, 2010Date of Patent: April 7, 2015Assignee: Dexerials CorporationInventors: Tsubasa Tsukahara, Yasushi Ito, Naoji Nada, Yoshihiro Oshima, Hideya Chubachi -
Patent number: 8770773Abstract: A light source device capable of suppressing generation of color unevenness, and a display device using the same are provided. The light source device 1 is provided with a plurality of excitation light sources 11 which are arranged at prescribed intervals D on a substrate 10 and emit blue light, and a phosphor layer 12 which converts part of the blue light emitted from the excitation light sources into red light and green light and arranged at a distance from the excitation light sources 11 to oppose the substrate 10. Fluctuation of intensity of each color light due to nonuniform application of the phosphor layer is difficult to occur as compared with a configuration in the past where the phosphor layer is formed adjacent to each excitation light source.Type: GrantFiled: November 27, 2008Date of Patent: July 8, 2014Assignee: Dexerials CorporationInventors: Tetsuyuki Yoshida, Shozo Masuda, Naoji Nada, Yasushi Ito, Tsubasa Tsukahara
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Publication number: 20130228944Abstract: A color converting member is capable of suppressing deterioration in a phosphor by a simple manufacturing process. A method of manufacturing a color converting member includes a process of molding a resin material into a shape. In the process, molding the resin material and the phosphor integrally into a shape is performed, after kneading a phosphor that converts one color light to another color light into the resin material.Type: ApplicationFiled: April 16, 2013Publication date: September 5, 2013Applicant: DEXERIALS CORPORATIONInventors: Tsubasa TSUKAHARA, Yasushi ITO, Naoji NADA, Yoshihiro OSHIMA, Hideya CHUBACHI
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Patent number: 8517551Abstract: A phosphor sheet having a laminated structure including a first barrier material, a first barrier material, a first color conversion layer, a second color conversion layer, and a second barrier layer and a display unit and an illuminating device including display unit is provided. A diffusion plate and a display unit including a diffusion plate are also provided.Type: GrantFiled: June 25, 2010Date of Patent: August 27, 2013Assignee: Dexerials CorporationInventors: Tsubasa Tsukahara, Naoji Nada, Ryo Kasegawa, Yasushi Ito, Yoshihiro Oshima
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Patent number: 8514350Abstract: There is provided is a display device capable of suppressing deterioration of the color conversion layer which converts one color light into another color light, and realizing favorable handling and a display device using the color conversion layer, and a color conversion sheet. A phosphor sheet 10 is, for example, arranged immediately above a light source such as a blue light emitting diode, and obtained by sealing a phosphor layer 11, which converts a part of blue light into another color light, by sealing sheets 12A and 12B. The sealing sheets 12A and 12B are bonded with the phosphor layer 11 in between by a first bonding layer 13 and a second bonding layer 14. Since the phosphor layer 11 is sealed by the sealing sheets 12A and 12B including a water vapor barrier layer 122 held between resin sheets 121A and 121B, water vapor is prevented from entering into the phosphor layer, and a chemical reaction is less likely to be generated between the phosphor layer 11 and the water vapor barrier layer 122.Type: GrantFiled: April 20, 2009Date of Patent: August 20, 2013Assignee: Sony CorporationInventors: Tsubasa Tsukahara, Yasushi Ito, Naoji Nada, Yoshiro Oshima, Hideya Chubachi
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Patent number: 8469530Abstract: [Object] To provide an illumination apparatus capable of suppressing a chromaticity fluctuation due to a view angle and an incident angle. [Solving Means] In an illumination apparatus for a display apparatus that includes a blue-color light-emitting diode (10) as a light source and a phosphor sheet (21) including a phosphor that obtains white light by converting a color of blue light from the blue-color light-emitting diode (10), diffusion plates (22, 23) are respectively provided opposed to a light-emitting-side surface and a light-incident-side surface of the phosphor sheet (21). The diffusion plate (22) opposed to the light-emitting-side surface of the phosphor sheet (21) suppresses a fluctuation of white-color chromaticity due to a view angle, and the diffusion plate (23) opposed to the light-incident-side surface of the phosphor sheet (21) suppresses a fluctuation of white-color chromaticity due to an incident angle.Type: GrantFiled: December 4, 2008Date of Patent: June 25, 2013Assignee: Dexerials CorporationInventors: Yasushi Ito, Ryo Kasegawa, Naoji Nada
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Patent number: 8451402Abstract: A color conversion sheet realizing suppression of deterioration in a color conversion layer and improvement in light extraction efficiency is provided. The color conversion sheet includes: a color conversion layer converting a part of first color light as incident light to second color light having a wavelength longer than that of the first color light; and a pair of sealing sheets sandwiching the color conversion layer from a light incidence side and a light emitting side and each having an inorganic stack film on a substrate. Reflectance of the sealing sheet on the light incidence side to the second color light is higher than that to the first color light, and reflectance of the sealing sheet on the light emitting side to the first color light is higher than that to the second color light.Type: GrantFiled: March 8, 2010Date of Patent: May 28, 2013Assignee: Sony CorporationInventors: Yoshihiro Oshima, Tsubasa Tsukahara, Yasushi Ito, Naoji Nada
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Patent number: 8313254Abstract: An image pickup apparatus includes a light-beam splitting mirror configured to transmit and reflect incident light that has entered the light-beam splitting mirror through a photographing optical system; an image sensor that receives light transmitted through the light-beam splitting mirror; an autofocus detecting unit that receives light reflected by the light-beam splitting mirror; a signal processing unit configured to process an image pickup signal of the image sensor; and a display unit configured to display an image being photographed, on the basis of an image signal obtained at the signal processing unit. In the image pickup apparatus, the light-beam splitting mirror has spectral characteristics including a reflectivity of 25% or more and 35% or less at a wavelength of 400 to 650 nm and a reflectivity of 60% or more at a wavelength of about 700 nm through optimization.Type: GrantFiled: May 13, 2010Date of Patent: November 20, 2012Assignee: Sony CorporationInventors: Yoshihiro Oshima, Shozo Masuda, Naoji Nada, Kazuhito Shimoda, Yasutoshi Katsuda, Hideaki Inoue, Yasuro Nakagawa
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Patent number: 8075148Abstract: An illumination apparatus includes a transparent substrate, a phosphor layer, an optical wavelength selection filter layer, and a light-emitting device. The transparent substrate includes a first surface and a second surface opposing each other. The phosphor layer is disposed on the first surface side of the transparent substrate. The optical wavelength selection filter layer is disposed on the second surface side of the transparent substrate and configured to transmit light of a first wavelength therethrough and reflect light of a second wavelength that is emitted from the phosphor layer by being excited by the light of the first wavelength. The light-emitting device is configured to emit the light of the first wavelength from the optical wavelength selection filter layer side thereof toward the optical wavelength selection filter layer.Type: GrantFiled: December 4, 2008Date of Patent: December 13, 2011Assignee: Sony CorporationInventor: Naoji Nada
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Patent number: 8035120Abstract: A semiconductor light emitting device capable of improving the light extraction efficiency while preventing deterioration of the light emission characteristic with time and a semiconductor light emitting device assembly including the semiconductor light emitting device are provided. The semiconductor light emitting device includes a semiconductor light emitting element containing a metal element, a cap portion formed from a material which contains a sulfur or halogen element and which is capable of transmitting the light from the semiconductor light emitting element, and a shielding film which is disposed between the semiconductor light emitting element and the cap portion, which transmits the light from the semiconductor light emitting element to the cap portion, and which separates the semiconductor light emitting element side and the cap portion side.Type: GrantFiled: January 22, 2007Date of Patent: October 11, 2011Assignee: Sony CorporationInventors: Yasushi Ito, Naoji Nada
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Patent number: 7952819Abstract: An optical device is provided. The optical device including an optical member having a first main surface and a second main surface, which respectively serve as an entrance surface and an exit surface for light from a directional light source, and made of a material having a refractive index greater than 1; and a support member at least including swing means for the optical member, wherein the first and second main surfaces of the optical member swingable by the support member are able to be inclined with respect to an optical path of the light from the directional light source.Type: GrantFiled: April 11, 2006Date of Patent: May 31, 2011Assignee: Sony CorporationInventors: Hideo Kawabe, Naoji Nada, Ryo Koshi Ishi
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Publication number: 20110037926Abstract: There is provided is a display device capable of suppressing deterioration of the color conversion layer which converts one color light into another color light, and realizing favorable handling and a display device using the color conversion layer, and a color conversion sheet. A phosphor sheet 10 is, for example, arranged immediately above a light source such as a blue light emitting diode, and obtained by sealing a phosphor layer 11, which converts a part of blue light into another color light, by sealing sheets 12A and 12B. The sealing sheets 12A and 12B are bonded with the phosphor layer 11 in between by a first bonding layer 13 and a second bonding layer 14. Since the phosphor layer 11 is sealed by the sealing sheets 12A and 12B including a water vapor barrier layer 122 held between resin sheets 121A and 121B, water vapor is prevented from entering into the phosphor layer, and a chemical reaction is less likely to be generated between the phosphor layer 11 and the water vapor barrier layer 122.Type: ApplicationFiled: April 20, 2009Publication date: February 17, 2011Applicant: SONY CORPORATIONInventors: Tsubasa Tsukahara, Yasushi Ito, Naoji Nada, Yoshiro Oshima, Hideya Chubachi
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Publication number: 20110002140Abstract: A phosphor sheet having a laminated structure including a first barrier material, a first barrier material, a first color conversion layer, a second color conversion layer, and a second barrier layer and a display unit and an illuminating device including display unit is provided. A diffusion plate and a display unit including a diffusion plate are also provided.Type: ApplicationFiled: June 25, 2010Publication date: January 6, 2011Applicant: SONY CORPORATIONInventors: Tsubasa Tsukahara, Naoji Nada, Ryo Kasegawa, Yasushi Ito, Yoshihiro Oshima
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Publication number: 20100310247Abstract: An image pickup apparatus includes a light-beam splitting mirror configured to transmit and reflect incident light that has entered the light-beam splitting mirror through a photographing optical system; an image sensor that receives light transmitted through the light-beam splitting mirror; an autofocus detecting unit that receives light reflected by the light-beam splitting mirror; a signal processing unit configured to process an image pickup signal of the image sensor; and a display unit configured to display an image being photographed, on the basis of an image signal obtained at the signal processing unit. In the image pickup apparatus, the light-beam splitting mirror has spectral characteristics including a reflectivity of 25% or more and 35% or less at a wavelength of 400 to 650 nm and a reflectivity of 60% or more at a wavelength of about 700 nm through optimization.Type: ApplicationFiled: May 13, 2010Publication date: December 9, 2010Applicant: Sony CorporationInventors: Yoshihiro OSHIMA, Shozo Masuda, Naoji Nada, Kazuhito Shimoda, Yasutoshi Katsuda, Hideaki Inoue, Yasuro Nakagawa
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Publication number: 20100246160Abstract: [Object] To provide an illumination apparatus capable of suppressing a chromaticity fluctuation due to a view angle and an incident angle. [Solving Means] In an illumination apparatus for a display apparatus that includes a blue-color light-emitting diode (10) as a light source and a phosphor sheet (21) including a phosphor that obtains white light by converting a color of blue light from the blue-color light-emitting diode (10), diffusion plates (22, 23) are respectively provided opposed to a light-emitting-side surface and a light-incident-side surface of the phosphor sheet (21). The diffusion plate (22) opposed to the light-emitting-side surface of the phosphor sheet (21) suppresses a fluctuation of white-color chromaticity due to a view angle, and the diffusion plate (23) opposed to the light-incident-side surface of the phosphor sheet (21) suppresses a fluctuation of white-color chromaticity due to an incident angle.Type: ApplicationFiled: December 4, 2008Publication date: September 30, 2010Applicant: Sony CorporationInventors: Yasushi Ito, Ryo Kasegawa, Naoji Nada
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Publication number: 20100238381Abstract: A color conversion sheet realizing suppression of deterioration in a color conversion layer and improvement in light extraction efficiency is provided. The color conversion sheet includes: a color conversion layer converting a part of first color light as incident light to second color light having a wavelength longer than that of the first color light; and a pair of sealing sheets sandwiching the color conversion layer from a light incidence side and a light emitting side and each having an inorganic stack film on a substrate. Reflectance of the sealing sheet on the light incidence side to the second color light is higher than that to the first color light, and reflectance of the sealing sheet on the light emitting side to the first color light is higher than that to the second color light.Type: ApplicationFiled: March 8, 2010Publication date: September 23, 2010Applicant: SONY CORPORATIONInventors: Yoshihiro Oshima, Tsubasa Tsukahara, Yasushi Ito, Naoji Nada
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COLOR CONVERTING MEMBER, METHOD OF MANUFACTURING THE SAME, LIGHT EMITTING DEVICE, AND DISPLAY DEVICE
Publication number: 20100188613Abstract: A color converting member is capable of suppressing deterioration in a phosphor by a simple manufacturing process. A method of manufacturing a color converting member includes a process of molding a resin material into a shape. In the process, molding the resin material and the phosphor integrally into a shape is performed, after kneading a phosphor that converts one color light to another color light into the resin material.Type: ApplicationFiled: January 20, 2010Publication date: July 29, 2010Applicant: SONY CORPORATIONInventors: Tsubasa Tsukahara, Yasushi Ito, Naoji Nada, Yoshihiro Oshima, Hideya Chubachi