Patents by Inventor Norikazu Uchiyama
Norikazu Uchiyama 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: 8013507Abstract: A cold cathode fluorescent lamp which makes a step dedicated to the acquisition of advantageous effects unnecessary without lowering an optical flux maintaining factor and, at the same time, prevents peeling-off of a phosphor layer in a step of bending light transmitting glass tube is provided. The cold cathode fluorescent lamp includes a light-transmitting glass tube, a phosphor layer which is formed on an inner surface of the light-transmitting glass tube, mercury and a rare gas which is filled in the inside of the light-transmitting glass tube, and cold cathodes which are arranged in a sealed manner in both end portions of the light-transmitting glass tube in a state that the cold cathodes face each other in an opposed manner, wherein the phosphor layer is constituted of a plurality of phosphor particles and a bonding agent. The bonding agent is made of aluminum oxide and boron oxide. The phosphor particles are covered with the bonding agent by coating.Type: GrantFiled: November 7, 2008Date of Patent: September 6, 2011Assignee: Hitachi Displays, Ltd.Inventor: Norikazu Uchiyama
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Patent number: 7671825Abstract: According to one aspect of the present invention, it is possible to sufficiently perform the discharging of charge without lowering the light emitting efficiency of an organic EL device and hence, the device can exhibit the light emitting efficiency higher than a conventional organic EL device and, at the same time, can prevent the degradation of the device. As an organic EL device to which the present invention is applied, on a glass transparent substrate, a transparent electrode, a hole injection layer and a hole transport layer which function as a hole transport function layer, a light emitting layer, an electron transport function layer, and a metal electrode are formed sequentially, and a drive power sources are connected to the transparent electrode and the metal electrode.Type: GrantFiled: February 24, 2006Date of Patent: March 2, 2010Assignee: Hitachi Displays, Ltd.Inventors: Norikazu Uchiyama, Masaaki Okunaka, Masahiro Nishizawa, Hidetsugu Matsukiyo, Yuko Matsumoto
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Publication number: 20090121612Abstract: A cold cathode fluorescent lamp which makes a step dedicated to the acquisition of advantageous effects unnecessary without lowering an optical flux maintaining factor and, at the same time, prevents peeling-off of a phosphor layer in a step of bending light transmitting glass tube is provided. The cold cathode fluorescent lamp includes a light-transmitting glass tube, a phosphor layer which is formed on an inner surface of the light-transmitting glass tube, mercury and a rare gas which is filled in the inside of the light-transmitting glass tube, and cold cathodes which are arranged in a sealed manner in both end portions of the light-transmitting glass tube in a state that the cold cathodes face each other in an opposed manner, wherein the phosphor layer is constituted of a plurality of phosphor particles and a bonding agent. The bonding agent is made of aluminum oxide and boron oxide. The phosphor particles are covered with the bonding agent by coating.Type: ApplicationFiled: November 7, 2008Publication date: May 14, 2009Inventor: Norikazu UCHIYAMA
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Patent number: 7397614Abstract: A display device includes an optical region containing a plurality of pigment grains. Each of the plurality of pigment grains formed by a plurality of pigment molecules encapsulated in an inorganic material, and each of the plurality of pigment grains has a grain size not greater than 70 nm.Type: GrantFiled: August 22, 2006Date of Patent: July 8, 2008Assignee: Hitachi Displays, Ltd.Inventors: Maki Taniguchi, Tomoji Oishi, Masahiro Nishizawa, Shinichi Kato, Norikazu Uchiyama
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Publication number: 20060279854Abstract: A display device includes an optical region containing a plurality of pigment grains. Each of the plurality of pigment grains formed by a plurality of pigment molecules encapsulated in an inorganic material, and each of the plurality of pigment grains has a grain size not greater than 70 nm.Type: ApplicationFiled: August 22, 2006Publication date: December 14, 2006Inventors: Maki Taniguchi, Tomoji Oishi, Masahiro Nishizawa, Shinichi Kato, Norikazu Uchiyama
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Patent number: 7148615Abstract: The present invention enhances the quality of displayed images by enhancing the uniformity of the total transmissivity over the whole surface of a panel having a wavelength selective absorption layer imparted with gradation thus reducing the color difference of the body color. A transmissivity ratio between a peripheral portion and a central portion of a panel formed of tinted glass which differs in wall thickness between the peripheral portion and the central portion of a screen before the surface treatment is set to a value not greater than 60%, and the body color of the panel is set such that L*=30 to 40, a*=?8.5 to 1.5, b*=?5 to 5 at the center portion, L*=13.5 to 23.5, a*=?7.5 to 2.5, b*=?6.5 to 3.5 at the peripheral portion, where color difference is set to ?a*b*?3, and the film formed on the outer surface of the panel is constituted of a wavelength selective absorption layer and a conductive layer which is formed over the wavelength selective absorption layer.Type: GrantFiled: February 10, 2004Date of Patent: December 12, 2006Assignee: Hitachi Displays, Ltd.Inventors: Toshio Tojo, Norikazu Uchiyama
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Publication number: 20060197462Abstract: According to one aspect of the present invention, it is possible to sufficiently perform the discharging of charge without lowering the light emitting efficiency of an organic EL device and hence, the device can exhibit the light emitting efficiency higher than a conventional organic EL device and, at the same time, can prevent the degradation of the device. As an organic EL device to which the present invention is applied, on a glass transparent substrate, a transparent electrode, a hole injection layer and a hole transport layer which function as a hole transport function layer, a light emitting layer, an electron transport function layer, and a metal electrode are formed sequentially, and a drive power sources are connected to the transparent electrode and the metal electrode.Type: ApplicationFiled: February 24, 2006Publication date: September 7, 2006Inventors: Norikazu Uchiyama, Masaaki Okunaka, Masahiro Nishizawa, Hidetsugu Matsukiyo, Yuko Matsumoto
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Patent number: 7099091Abstract: In a display device comprising an optical region containing a plurality of pigment grains utilized for wavelength selection, anti-reflection, improvement of the light emitting performance and the like, dyestuff molecules utilized for forming the pigment grains to be dissolved in a solvent in which the dyestuff molecules are insoluble originally are chemically modified, and then the solubility of the modified dyestuff molecules in the solvent is reduced by energy transfer thereto to aggregate the dyestuff molecules, so that grain sizes of pigment grains are suitably controlled for the optical region in accordance with its use.Type: GrantFiled: November 26, 2003Date of Patent: August 29, 2006Assignee: Hitachi Displays, Ltd.Inventors: Maki Taniguchi, Tomoji Oishi, Masahiro Nishizawa, Shinichi Kato, Norikazu Uchiyama
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Patent number: 6992425Abstract: A high definition display apparatus having a wavelength selective absorption effect and an anti-static and anti-reflection effect is provided by thin films having a low resistance and a high refractive index. The high definition display apparatus has an anti-static and anti-reflection film composed of laminated oxide or metallic thin films, wherein at least three layers of oxide or metallic films having different reflectance from each other are laminated onto the front surf ace of the display apparatus, and the laminated films are composed such that an absorbing film containing coloring material is arranged under a high reflectance film as seen from the outer surface of the laminated films.Type: GrantFiled: October 7, 1999Date of Patent: January 31, 2006Assignees: Hitachi, Ltd., Hitachi-Device Engineering Co., Ltd.Inventors: Takao Ishikawa, Daigoro Kamoto, Tomoji Oishi, Ken Takahashi, Norikazu Uchiyama, Kiyoshi Miura, Masahiro Nishizawa, Toshio Tojo
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Publication number: 20040178717Abstract: The present invention enhances the quality of displayed images by enhancing the uniformity of the total transmissivity over the whole surface of a panel having a wavelength selective absorption layer imparted with gradation thus reducing the color difference of the body color.Type: ApplicationFiled: February 10, 2004Publication date: September 16, 2004Inventors: Toshio Tojo, Norikazu Uchiyama
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Patent number: 6791256Abstract: A display device includes a first substrate, a second substrate disposed to face the first substrate, plural pixels disposed in a display area on an inner surface of the first substrate, a rubber member disposed between the first and second substrates to surround the display area, and sealing the display area from an ambient atmosphere, and an adhesive layer sealing together the first and second substrates along peripheries thereof. The adhesive layer is derived from a sol-gel solution.Type: GrantFiled: February 11, 2003Date of Patent: September 14, 2004Assignee: Hitachi, Ltd.Inventors: Masahiro Nishizawa, Noriharu Matsudate, Norikazu Uchiyama, Maki Taniguchi
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Publication number: 20040169936Abstract: In a display device comprising a optical region containing a plurality of pigment grains utilized for wavelength selection, anti-reflection, improvement for light emitting performance or else, the present invention chemically modifies dyestuff molecules utilized for forming the pigment grains to be dissolved in a solvent in which the dyestuff molecules are insoluble originally, and then reduces solubility of the modified dyestuff molecules in the solvent by energy transfer thereto to aggregate the dyestuff molecules, so that grain sizes of pigment grains are suitably controlled for the optical region in accordance with its use.Type: ApplicationFiled: November 26, 2003Publication date: September 2, 2004Inventors: Maki Taniguchi, Tomoji Oishi, Masahiro Nishizawa, Shinichi Kato, Norikazu Uchiyama
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Patent number: 6771017Abstract: A cathode ray tube includes a film which is formed on an outer surface of a panel portion. The film is comprised of a first particles which become transparent due to the oxidation and a second particles which are chemically and physically stable and have the light absorbing ability and the conductivity. A number of the transparent first particles is gradually increased toward a peripheral portion from the center portion of the panel portion.Type: GrantFiled: January 8, 2002Date of Patent: August 3, 2004Assignee: Hitachi, Ltd.Inventors: Masahiro Nishizawa, Norikazu Uchiyama, Maki Taniguchi, Toshio Tojo, Tomoji Oishi
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Patent number: 6642647Abstract: A color cathode ray tube is generally constituted from a panel section for visually displaying images and a neck portion containing therein an electron gun assembly plus a funnel section for coupling the panel section and the neck portion together. The panel comprises on its outer surface a colored film that includes a coloring matter or pigment for color-selective absorption of light rays and fine or micro-particles with electricity-resistant property for letting the pigment scatter or disperse. With said arrangement, it is possible to improve the light absorbability of the colored film, thereby enabling provision of the intended cathode ray tube with improved contrast.Type: GrantFiled: January 25, 2001Date of Patent: November 4, 2003Assignee: Hitachi, Ltd.Inventors: Maki Taniguchi, Masahiro Nishizawa, Norikazu Uchiyama, Toshio Tojo
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Publication number: 20030155861Abstract: A display device includes a first substrate, a second substrate disposed to face the first substrate, plural pixels disposed in a display area on an inner surface of the first substrate, a rubber member disposed between the first and second substrates to surround the display area, and sealing the display area from an ambient atmosphere, and an adhesive layer sealing together the first and second substrates along peripheries thereof. The adhesive layer is derived from a sol-gel solution.Type: ApplicationFiled: February 11, 2003Publication date: August 21, 2003Applicant: Hitachi, Ltd.Inventors: Masahiro Nishizawa, Noriharu Matsudate, Norikazu Uchiyama, Maki Taniguchi
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Patent number: 6465947Abstract: A panel has a flat external surface and has a curvature on an inner surface thereof. A coating having light absorption characteristics is formed on the external surface of the panel. To the top of the coating, a film which has light absorbing characteristics and contains an adhesive is adhered. The light absorption by the coating is large at the central portion of the panel and is small at the peripheral portion of the panel. The light absorption characteristics of the film is approximately uniform on the entire surface of the panel. Due to such a constitution, a color picture tube having a flat external surface, the least brightness difference and an excellent contrast can be realized.Type: GrantFiled: January 28, 2000Date of Patent: October 15, 2002Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.Inventors: Toshio Tojo, Nobuhiko Hosotani, Masahiro Nishizawa, Norikazu Uchiyama, Maki Taniguchi
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Publication number: 20020145377Abstract: A cathode ray tube includes a film which is formed on an outer surface of a panel portion. The film is comprised of a first particles which become transparent due to the oxidation and a second particles which are chemically and physically stable and have the light absorbing ability and the conductivity. A number of the transparent first particles is gradually increased toward a peripheral portion from the center portion of the panel portion.Type: ApplicationFiled: January 8, 2002Publication date: October 10, 2002Inventors: Masahiro Nishizawa, Norikazu Uchiyama, Maki Taniguchi, Toshio Tojo, Tomoji Oishi
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Publication number: 20020135291Abstract: A color cathode ray tube is generally constituted from a panel section for visually displaying images and a neck portion containing therein an electron gun assembly plus a funnel section for coupling the panel section and the neck portion together. The panel comprises on its outer surface a colored film that includes a coloring matter or pigment for color-selective absorption of light rays and fine or micro-particles with electricity-resistant property for letting the pigment scatter or disperse.Type: ApplicationFiled: January 25, 2001Publication date: September 26, 2002Inventors: Maki Taniguchi, Masahiro Nishizawa, Norikazu Uchiyama, Toshio Tojo
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Publication number: 20020043922Abstract: A display device having a surface treating film formed on the outer surface of a substrate of the display device, said surface treating film having a property of changing light transmittance or refractive index by light or UV rays, and/or containing a compound which can be deposited by irradiation with light, shows excellent antireflective antistatic properties and low surface resistance, and can be applied to flat cathode-ray tubes.Type: ApplicationFiled: September 28, 2001Publication date: April 18, 2002Applicant: Hitachi, Ltd.Inventors: Tomoji Oishi, Masahiro Nishizawa, Norikazu Uchiyama, Maki Taniguchi, Toshio Tojo
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Patent number: 6359380Abstract: In a color cathode ray tube having a vacuum vessel that comprises a panel, a neck for housing an electron gun therein, and a funnel for connecting the panel and the neck, in which the inner surface of the panel glass is coated with a phosphor layer in different colors to give a display screen; the panel glass contains ions capable of selectively absorbing light within the range of visible rays, and its outer surface is coated with an electric conductive surface film.Type: GrantFiled: March 1, 1999Date of Patent: March 19, 2002Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., LtdInventors: Masahiro Nishizawa, Toshio Tojo, Norikazu Uchiyama, Maki Ito, Kiyoshi Miura, Hidetsugu Matsukiyo, Tomoji Ohishi, Daigoro Kamoto