Patents by Inventor Kohei Nagayama
Kohei Nagayama 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: 20110121738Abstract: A light-emitting apparatus includes a plurality of light-emitting devices which are connected in series and formed by alternately disposing electrodes and organic layers including a light-emitting material, wherein the electrodes include one electrode and another electrode disposed at an anode end and a cathode end of the light-emitting devices, respectively, and an intermediate electrode disposed between two of the organic layers which serves as a cathode of the light-emitting device disposed on a side of the anode end and as an anode of the light-emitting device disposed on a side of the cathode end; the intermediate electrode is connected to a drive circuit having two current output terminals connected in common; the drive circuit receives data signals concerning two of the plurality of light-emitting devices for which the intermediate electrode serves as the anode and the cathode, respectively; and the drive circuit outputs currents which are different in direction from each other from the two current outType: ApplicationFiled: June 19, 2009Publication date: May 26, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Fujio Kawano, Masami Iseki, Kohei Nagayama, Nobuhiko Sato, Toshihiko Mimura, Hiroyuki Maru, Yutaka Inaba
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Publication number: 20110115961Abstract: Light is prevented from being emitted from a region that overlaps a contract hole in a structure in which light emitting devices are stacked. A stacked organic electro-luminescent display apparatus includes a contact hole that electrically connects a first electrode or a second electrode to a driving circuit. The first or second electrode and a second organic compound layer are provided in the contact hole, and the second organic compound layer existing in the contact hole does not emit light.Type: ApplicationFiled: July 9, 2009Publication date: May 19, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Takashi Moriyama, Toshihiko Mimura, Nobuhiko Sato, Kohei Nagayama, Masami Iseki, Nozomu Izumi, Junya Tamaki
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Publication number: 20110095279Abstract: Provided is an organic electroluminescence display apparatus capable of reducing a chromaticity difference caused by light emission from an organic layer including an emission layer having the same color, which is continuously formed over two sub-pixels included in a pixel. The organic electroluminescence display apparatus includes: a substrate; and multiple organic electroluminescence devices which are stacked on the substrate, each of which includes electrodes and an organic layer sandwiched by the electrodes in which first organic layer and a second organic layer are arranged side by side in an emission region corresponding to a pixel formed on the substrate and a third organic layer is stacked over the first organic layer and the second organic layer through an intermediate electrode. The third organic layer has an emission spectrum peak wavelength which is longer than an emission spectrum peak wavelength of at least one of the first organic layer and the second organic layer.Type: ApplicationFiled: July 10, 2009Publication date: April 28, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Nobutaka Mizuno, Nobuhiko Sato, Kohei Nagayama
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Publication number: 20110031514Abstract: There is provided a display apparatus that can improve the protective function and light utilization efficiency of organic EL devices and that has a simple structure. The display apparatus includes a plurality of organic EL devices formed on a substrate and a protective layer formed on the organic EL devices. The protective layer includes a first protective layer made of an inorganic material, a second protective layer made of a resin and having a microlens formed therein, and a third protective layer made of an inorganic material.Type: ApplicationFiled: August 13, 2010Publication date: February 10, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Kiyofumi Sakaguchi, Yasushi Iwakura, Kohei Nagayama
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Patent number: 7728797Abstract: Provided is an organic EL display apparatus capable of opening and breaking a defective portion without degrading a normal portion of a pixel, and a method of producing the same. The method of producing an organic EL display apparatus in which a plurality of pixels including organic EL devices are arranged includes the steps of: forming an organic EL device formed of a light emitting layer made of an organic compound between a cathode electrode and an anode electrode (Step S1); detecting a defective pixel in which a cathode electrode and an anode electrode are short-circuited (Step 2); and repairing the defective pixel to be opened by selectively applying a voltage between the cathode electrode and the anode electrode with respect to the defective pixel (Step S3).Type: GrantFiled: May 11, 2007Date of Patent: June 1, 2010Assignee: Canon Kabushiki KaishaInventor: Kohei Nagayama
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Publication number: 20100068840Abstract: Provided are an organic light emitting apparatus for use in, for example, a flat device display, and a method of producing the apparatus. The organic light emitting apparatus has sides formed by division at ends of its substrate. Three-dimensional portions are formed on the surface of the substrate along the sides. An inorganic sealing layer is formed to extend toward the three-dimensional portions.Type: ApplicationFiled: November 20, 2009Publication date: March 18, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Takuro Yamazaki, Kohei Nagayama
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Patent number: 7663799Abstract: A movable particle display (such as an electrophoretic display) in which a plurality of closed spaces are two-dimensionally disposed along a surface of the substrate, a plurality of particles contained in each of the closed spaces, and a reflection surface for reflecting light which enters each of the closed particles are moved inside a closed space, between a position at which they cover a reflecting surface and a position at which they are collected to expose the reflecting surface. At least a part of the reflecting surface diffusely reflects incident light with an intensity distribution having directional properties (i.e. non-isotropically).Type: GrantFiled: September 29, 2004Date of Patent: February 16, 2010Assignee: Canon Kabushiki KaishaInventors: Hiroshi Matsuda, Taro Endo, Kohei Nagayama, Tsutomu Ikeda, Etsuro Kishi
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Patent number: 7646037Abstract: Provided are an organic light emitting apparatus for use in, for example, a flat device display, and a method of producing the apparatus. The organic light emitting apparatus has sides formed by division at ends of its substrate. Three-dimensional portions are formed on the surface of the substrate along the sides. An inorganic sealing layer is formed to extend toward the three-dimensional portions.Type: GrantFiled: February 16, 2007Date of Patent: January 12, 2010Assignee: Canon Kabushiki KaishaInventors: Takuro Yamazaki, Kohei Nagayama
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Patent number: 7646148Abstract: An organic EL device array in which water or oxygen hardly enters a light emitting region, and high-quality light emission can be maintained for a longer period of time. The organic EL device array includes: a light emitting region (region I) having a plurality of organic EL light emitting portions for emitting light in an organic compound layer disposed between a pair of electrodes; a protective layer in contact with an upper electrode of the pair of electrodes; a member disposed on the protective layer; an intermediate layer disposed between the protective layer and the member, in which a thinner portion of the intermediate layer is present outside a light emitting region (region O) within the surface thereof.Type: GrantFiled: January 23, 2007Date of Patent: January 12, 2010Assignee: Canon Kabushiki KaishaInventor: Kohei Nagayama
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Publication number: 20090267504Abstract: Provided are an organic light emitting apparatus for use in, for example, a flat device display, and a method of producing the apparatus. The organic light emitting apparatus has sides formed by division at ends of its substrate. Three-dimensional portions are formed on the surface of the substrate along the sides. An inorganic sealing layer is formed to extend toward the three-dimensional portions.Type: ApplicationFiled: July 1, 2009Publication date: October 29, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Takuro Yamazaki, Kohei Nagayama
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Publication number: 20090121992Abstract: A color display apparatus is of the type wherein a unit pixel is constituted by at least three subpixels including first to third subpixels, and at each subpixel, a medium for changing an optical property depending on a voltage applied thereto is disposed. The color display apparatus includes means for applying a voltage, to each of the first to third subpixels, for changing the optical property of the medium within a brightness change range in which light passing through the medium is changed in brightness and a hue change range in which the light passing through the medium assumes chromatic color and a hue of the chromatic color is changed while including combinations of red and green, red and blue, and green and blue for the first to third subpixels, respectively.Type: ApplicationFiled: May 13, 2005Publication date: May 14, 2009Applicant: Canon Kabushiki KaishaInventors: Yasufumi Asao, Kohei Nagayama, Ryuichiro Isobe, Hideo Mori, Hironao Tanaka, Hiroshi Matsuda
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Publication number: 20090046107Abstract: A display apparatus includes a display portion and a control portion, and effects color display depending on image signals for three colors. The control portion includes means 10, into which the image signals for three colors are inputted, for generating a first display signal for determining a brightness of predetermined one color at the display portion and second display signals for determining a hue of other two colors or an intermediary color therebetween at the display portion.Type: ApplicationFiled: October 21, 2008Publication date: February 19, 2009Applicant: CANON KABUSHIKI KAISHAInventors: YASUFUMI ASAO, Hideo Mori, Kohei Nagayama, Hironao Tanaka, Ryuichiro Isobe
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Publication number: 20080309235Abstract: A top-emission type organic EL panel has a substrate carrying thin film transistors formed thereon, a plurality of organic EL devices formed on the substrate, each of the organic EL devices including a reflecting electrode, organic compound layers and a transparent electrode arranged in this order from the substrate side, a device separation layer formed in a space separating adjacently located organic EL devices, a protective layer covering the organic EL devices and the device separation layer and a light-shielding layer formed on the protective layer in a display region other than light emitting sections of the organic EL devices so as to be held in contact with the protective layer and cover at least part of lateral surfaces of the device separation layer.Type: ApplicationFiled: June 9, 2008Publication date: December 18, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Takuro Yamazaki, Kohei Nagayama
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Patent number: 7460115Abstract: A display apparatus includes a display portion and a control portion, and effects color display depending on image signals for three colors. The control portion includes means 10, into which the image signals for three colors are inputted, for generating a first display signal for determining a brightness of predetermined one color at the display portion and second display signals for determining a hue of other two colors or an intermediary color therebetween at the display portion.Type: GrantFiled: July 1, 2005Date of Patent: December 2, 2008Assignee: Canon Kabushiki KaishaInventors: Yasufumi Asao, Hideo Mori, Kohei Nagayama, Hironao Tanaka, Ryuichiro Isobe
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Publication number: 20080143248Abstract: The present invention provides an organic light emitting apparatus having a liquid moisture absorbing member, the apparatus being capable of having a larger area than an organic light emitting apparatus having a same size substrate and without the liquid moisture absorbing member and of obtaining stable device characteristics without impairing the advantage of the liquid moisture absorbing member, in other words, by narrowing a non-light emitting region, and a method of producing the apparatus. The organic light emitting apparatus of the present invention has a side where a drive circuit is formed and a side where the drive circuit is not formed, and each of a starting point and an ending point of the application of the moisture absorbing member is placed on the side where the drive circuit is formed.Type: ApplicationFiled: November 27, 2007Publication date: June 19, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Taro ENDO, Kohei Nagayama
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Patent number: 7310126Abstract: There is disclosed a liquid crystal display device comprising an array substrate, an counter substrate, and a liquid crystal layer which is held between the array substrate and the counter substrate and whose liquid crystal molecular arrangement is divided into a plurality of pixel areas controlled by the array substrate and opposite substrate. The array substrate includes a reflective pixel electrode for scattering a light incident via the counter substrate and liquid crystal layer. The reflective pixel electrode has a reflective surface in which a first undulation having a gradual inclined surface disposed in each pixel area and a second undulation having a plurality of convex portions as main scattering portions disposed in each pixel area are superimposed.Type: GrantFiled: January 20, 2006Date of Patent: December 18, 2007Assignee: Kabushiki Kaisha ToshibaInventors: Kohei Nagayama, Yasuyuki Hanazawa
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Publication number: 20070273294Abstract: Provided is an organic EL display apparatus capable of opening and breaking a defective portion without degrading a normal portion of a pixel, and a method of producing the same. The method of producing an organic EL display apparatus in which a plurality of pixels including organic EL devices are arranged includes the steps of: forming an organic EL device formed of a light emitting layer made of an organic compound between a cathode electrode and an anode electrode (Step S1); detecting a defective pixel in which a cathode electrode and an anode electrode are short-circuited (Step 2); and repairing the defective pixel to be opened by selectively applying a voltage between the cathode electrode and the anode electrode with respect to the defective pixel (Step S3).Type: ApplicationFiled: May 11, 2007Publication date: November 29, 2007Applicant: CANON KABUSHIKI KAISHAInventor: Kohei Nagayama
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Publication number: 20070273271Abstract: Provided are an organic light emitting apparatus for use in, for example, a flat device display, and a method of producing the apparatus. The organic light emitting apparatus has sides formed by division at ends of its substrate. Three-dimensional portions are formed on the surface of the substrate along the sides. An inorganic sealing layer is formed to extend toward the three-dimensional portions.Type: ApplicationFiled: February 16, 2007Publication date: November 29, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Takuro Yamazaki, Kohei Nagayama
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Publication number: 20070222382Abstract: A organic light-emitting device includes a substrate including at least a base material, at least one organic light-emitting element which includes (a) a pair of electrodes provided on the substrate and an organic compound layer disposed between the pair of electrodes, and (b) provides a light-emitting area, an inorganic sealing layer provided on the organic light-emitting element and the surface of the substrate, and an adhesion layer which is provided between the substrate and the inorganic sealing layer and only on the periphery of the light-emitting area for closely contacting the surface of the substrate and the inorganic sealing layer, and inhibits moisture from intruding at an edge of the inorganic sealing layer.Type: ApplicationFiled: February 28, 2007Publication date: September 27, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Takuro Yamazaki, Kohei Nagayama
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Publication number: 20070182322Abstract: Provided is an organic EL device array in which water or oxygen hardly enters a light emitting region, and high-quality light emission can be maintained for a longer period of time. The organic EL device array includes: a light emitting region (region I) having a plurality of organic EL light emitting portions for emitting light in an organic compound layer disposed between a pair of electrodes; a protective layer in contact with an upper electrode of the pair of electrodes; a member disposed on the protective layer; an intermediate layer disposed between the protective layer and the member, in which a thinner portion of the intermediate layer is present outside a light emitting region (region O) within the surface thereof.Type: ApplicationFiled: January 23, 2007Publication date: August 9, 2007Applicant: CANON KABUSHIKI KAISHAInventor: Kohei Nagayama