Patents by Inventor Naoki Tokuda
Naoki Tokuda 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: 9184416Abstract: An organic EL display device includes plural pixels that is arranged on a substrate in a matrix, a light shielding film that shields boundaries of the plurality of pixels, and a light emitting area in which an organic layer that is arranged between a lower electrode and an upper electrode, and formed of a plurality of layers including a light emitting layer that emits a light comes in contact with the lower electrode, in each of the plurality of pixels, in which the light shielding film has wide portions and narrow portions which are arranged along sides of the pixels, and different in width from each other.Type: GrantFiled: August 13, 2014Date of Patent: November 10, 2015Assignee: JAPAN DISPLAY INC.Inventors: Naoki Tokuda, Mitsuhide Miyamoto
-
Patent number: 9142802Abstract: Provided is a display device that even in the case where microlenses are formed to increase the light extraction efficiency, can decrease damage on an OLED caused by the production of the microlenses. The display device includes a first substrate; light emitting elements provided on the first substrate and located in correspondence with pixels arrayed in a matrix; a second substrate; a light collection layer provided on the second substrate and including, on the side facing the light emitting elements, at least one convex lens in correspondence with each of the pixels; and a light-transmissive layer that is provided between the first substrate and the second substrate so as to be in contact with the lens and has a refractive index lower than that of the light collection layer.Type: GrantFiled: September 25, 2014Date of Patent: September 22, 2015Assignee: JAPAN DISPLAY INC.Inventors: Mitsuhide Miyamoto, Naoki Tokuda, Toshihiro Sato
-
Publication number: 20150162394Abstract: An organic electroluminescence display device includes a substrate; a thin film transistor that is formed on the substrate; a light emitting region that has a lower electrode, a light emitting layer, and an upper electrode formed for each of a plurality of pixels arranged in a matrix shape on the thin film transistor; and a contact hole that is formed on the outside of the light emitting region in one corner portion of the pixel and connects the thin film transistor and the lower electrode for each pixel in a plan view. Only one pair of pixels of four pixels that share an intersection point of boundaries of the pixels arranged in the matrix shape, which are arranged in a diagonal manner have the contact holes at the corner portions having the intersection point.Type: ApplicationFiled: December 4, 2014Publication date: June 11, 2015Inventors: Naoki TOKUDA, Mitsuhide MIYAMOTO
-
Publication number: 20150115274Abstract: Provided is a display device (1a), including: a substrate on which a plurality of pixels are arranged in a display region; a plurality of connection pads (C) provided on one surface of the substrate; and wires connecting the plurality of pixels and the plurality of connection pads to each other, the substrate including: a panel portion in which the plurality of pixels are arranged; and a terminal portion (30) in which the plurality of connection pads are arranged, the terminal portion including: a first portion (32) continuing to a first direction side of the panel portion; and a second portion (34) opposing the first portion, the second portion being formed by bending a portion of the terminal portion, the plurality of connection pads being arranged in the first portion and the second portion.Type: ApplicationFiled: October 23, 2014Publication date: April 30, 2015Inventors: Masamitsu FURUIE, Toshihiro SATO, Kazuhiro ODAKA, Naoki TOKUDA
-
Publication number: 20150090993Abstract: A display device, includes: a first substrate; an organic planarizing film that is made of an organic insulating material, and arranged on the first substrate; an electrode that comes in contact with a part of a surface of the organic planarizing film opposite to the first substrate side; an inorganic bank that is made of an inorganic insulating material, covers an end of the electrode, and comes in contact with a part of a surface of the organic planarizing film opposite to the first substrate side; an OLED layer that covers a side of the electrode and the inorganic bank opposite to a side that comes in contact with the organic planarizing film, and partially comes in contact with the organic planarizing film; and a sealing film that is configured to cover a side of the OLED layer opposite to the organic planarizing film side.Type: ApplicationFiled: October 1, 2014Publication date: April 2, 2015Inventors: Naoki TOKUDA, Mitsuhide MIYAMOTO
-
Patent number: 8994635Abstract: The invention provides an image display device capable of reducing the transmission delay of a scanning signal. A plurality of scanning signal lines are wired in one pixel circuit row. Pixel circuits of the pixel circuit row are connected to any of the plurality of scanning signal lines.Type: GrantFiled: June 5, 2009Date of Patent: March 31, 2015Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Kenta Kajiyama, Takeshi Izumida, Norihiro Nakamura, Naoki Tokuda
-
Publication number: 20150084026Abstract: Provided is a display device that even in the case where microlenses are formed to increase the light extraction efficiency, can decrease damage on an OLED caused by the production of the microlenses. The display device includes a first substrate; light emitting elements provided on the first substrate and located in correspondence with pixels arrayed in a matrix; a second substrate; a light collection layer provided on the second substrate and including, on the side facing the light emitting elements, at least one convex lens in correspondence with each of the pixels; and a light-transmissive layer that is provided between the first substrate and the second substrate so as to be in contact with the lens and has a refractive index lower than that of the light collection layer.Type: ApplicationFiled: September 25, 2014Publication date: March 26, 2015Inventors: Mitsuhide Miyamoto, Naoki Tokuda, Toshihiro Sato
-
Publication number: 20150076476Abstract: A method of manufacturing an organic electroluminescent display device includes the steps of: forming a first insulating layer on a substrate; forming a first patterning layer; forming a second patterning layer; forming a trench portion; and forming an electrode layer on the second patterning layer and in the trench portion, wherein in the step of forming the trench portion, an end of the first patterning layer exposed within the trench portion is etched to an outside more than an end of the second patterning layer exposed within the trench portion in a plan view, and in the step of forming the electrode layer, the electrode layer formed within the trench portion is isolated from the electrode layer formed outside of the trench portion.Type: ApplicationFiled: September 18, 2014Publication date: March 19, 2015Inventors: Kazuhiro ODAKA, Toshihiro SATO, Naoki TOKUDA
-
Publication number: 20150048347Abstract: An organic EL display device includes plural pixels that is arranged on a substrate in a matrix, a light shielding film that shields boundaries of the plurality of pixels, and a light emitting area in which an organic layer that is arranged between a lower electrode and an upper electrode, and formed of a plurality of layers including a light emitting layer that emits a light comes in contact with the lower electrode, in each of the plurality of pixels, in which the light shielding film has wide portions and narrow portions which are arranged along sides of the pixels, and different in width from each other.Type: ApplicationFiled: August 13, 2014Publication date: February 19, 2015Inventors: Naoki TOKUDA, Mitsuhide MIYAMOTO
-
Publication number: 20140332781Abstract: A display device comprising including a plurality of pixels arranged in the shape of a matrix above a substrate, and a plurality of thin film transistors arranged corresponding to each of the plurality of pixel having an organic EL layer, the device comprising; a planarized film covering the thin film transistor and a wire connected with the thin film transistor; a reflecting layer formed above the planarized film; a light path length expanded layer covering the reflecting layer; and a pixel transparent electrode formed above the light path length expanded layer.Type: ApplicationFiled: May 13, 2014Publication date: November 13, 2014Applicant: Japan Display Inc.Inventors: Naoki TOKUDA, Mitsuhide MIYAMOTO
-
Publication number: 20140297096Abstract: This sensor state determination system is a sensor state monitoring system capable of accurately determining whether or not a detecting sensor used with a railroad vehicle is in an abnormal state. This system includes: a detecting sensor capable of detecting a physical value acting upon the railroad vehicle; and an electronic control device. A monitoring sensor equivalent to the detection sensor is installed at a position equivalent to the position of the detection sensor. The electronic control device is provided with a determination means (coherence calculation section, state determination section) that computes, based on a first signal detected by the detecting sensor and a second signal detected by the monitoring sensor, a coherence value indicating a correlation between the signals. The electronic control device determines that the detecting sensor is in an abnormal state if the coherence value is smaller than a preset abnormality determination value.Type: ApplicationFiled: February 7, 2012Publication date: October 2, 2014Applicants: CENTRAL JAPAN RAILWAY COMPANY, NIPPON SHARYO, LTD.Inventors: Koichiro Nanba, Nobuyuki Okada, Takahiro Sasauchi, Tatsuya Mita, Tomohiro Otsuka, Tomonori Goto, Yasuki Nakakura, Naoki Tokuda
-
Publication number: 20140284579Abstract: An organic EL display device has a pixel electrode and a common electrode, a first insulating layer that covers a thin-film transistor, a first wire provided on the first insulating layer to electrically connect the thin-film transistor and the pixel electrode, a second wire provided on the first insulating layer to be connected to a gate electrode of the thin-film transistor, and a conducting film formed on the first wire and the second wire from a material on which an oxide film is harder to be formed than those of the first wire and the second wire. At least one of the pixel electrode, the first wire, and the second wire and the conducting film are located to overlap above the first insulating layer in electrical insulation so that a capacitor that retains a control signal is formed between the first wire and the second wire.Type: ApplicationFiled: March 21, 2014Publication date: September 25, 2014Applicant: Japan Display Inc.Inventors: Naoki TOKUDA, Mitsuhide MIYAMOTO
-
Publication number: 20140285112Abstract: The present invention overcomes image defects such as the brightness inclination or smears by reducing the line resistance of a power source bus line which supplies electricity to organic EL elements. A plurality of pixels which are arranged in a matrix array is connected to power source lines, and the plurality of power source lines are connected to a power source bus line. Both ends of the power source bus line are connected to a power source part via a FPC. By supplying electricity to both ends of the power source bus line from the power source part, the line resistance of the power source bus line can be reduced.Type: ApplicationFiled: June 3, 2014Publication date: September 25, 2014Applicants: PANASONIC LIQUID CRYSTAL DISPLAY CO., INC., JAPAN DISPLAY INC.Inventors: Naoki TOKUDA, Hiroshi KAGEYAMA, Masamitsu Mobara
-
Patent number: 8816997Abstract: Provided is an image display device for displaying an image by causing a light emitting element to emit light, the light emitting element being disposed in each of a plurality of pixel areas which are defined by dividing a display area into a grid pattern, the image display device including a pixel circuit for controlling light emission of the light emitting element disposed in each of the plurality of pixel areas, the pixel circuit being formed in an area having a portion that protrudes from the pixel area of the pixel circuit toward an adjacent pixel area and a portion where an adjacent pixel area protrudes into the pixel area.Type: GrantFiled: March 5, 2010Date of Patent: August 26, 2014Assignees: Japan Display Inc., Canon Kabushiki KaishaInventors: Naoki Tokuda, Atsushi Hasegawa
-
Publication number: 20140197395Abstract: An organic luminescent display device according to the invention includes: an element substrate; an organic film; and an organic electro luminescent element formed on the organic film. The organic electro luminescent element includes: an anode formed on the organic film; a light emitting layer formed on the anode; and a cathode formed on the light emitting layer. The anode includes: an adhesion layer formed in contact with an upper surface of the organic film; a reflection layer and formed in contact with an upper surface of the adhesion layer; and a light transmitting contact layer formed on the reflection layer. An edge portion of an outer periphery of the adhesion layer is positioned outside an edge portion of an outer periphery of the reflection layer as viewed in a plan view.Type: ApplicationFiled: January 15, 2014Publication date: July 17, 2014Applicant: Japan Display Inc.Inventors: Tomoyuki ARIYOSHI, Naoki TOKUDA, Toshihiro SATO
-
Patent number: 8773025Abstract: The present invention overcomes image defects such as the brightness inclination or smears by reducing the line resistance of a power source bus line which supplies electricity to organic EL elements. A plurality of pixels which are arranged in a matrix array is connected to power source lines, and the plurality of power source lines are connected to a power source bus line. Both ends of the power source bus line are connected to a power source part via a FPC. By supplying electricity to both ends of the power source bus line from the power source part, the line resistance of the power source bus line can be reduced.Type: GrantFiled: December 17, 2013Date of Patent: July 8, 2014Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Naoki Tokuda, Hiroshi Kageyama, Masamitsu Furuie
-
Patent number: 8729794Abstract: There is provided a display device comprising a plurality of active elements on a substrate, a first insulating film for covering the active elements, electroconductive films were separated for each pixel on the first insulating film, a light-emitting layer disposed in an upper layer of the electroconductive films, and a common electrode disposed in an upper layer of the light-emitting layer, wherein a structure is used in which the electroconductive films have a layered film of a first electroconductive film, second electroconductive film, and third electroconductive film; the first electroconductive film is composed of ITO or chromium; the second electroconductive film is composed of aluminum with alumina on a surface; the second electroconductive film covers outside edges of the first electroconductive film; the third electroconductive film is composed of ITO; and the first electroconductive film and third electroconductive film are caused to contact each other.Type: GrantFiled: May 30, 2008Date of Patent: May 20, 2014Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Atsushi Hasegawa, Naoki Tokuda
-
Publication number: 20140104145Abstract: The present invention overcomes image defects such as the brightness inclination or smears by reducing the line resistance of a power source bus line which supplies electricity to organic EL elements. A plurality of pixels which are arranged in a matrix array is connected to power source lines, and the plurality of power source lines are connected to a power source bus line. Both ends of the power source bus line are connected to a power source part via a FPC. By supplying electricity to both ends of the power source bus line from the power source part, the line resistance of the power source bus line can be reduced.Type: ApplicationFiled: December 17, 2013Publication date: April 17, 2014Applicants: Panasonic Liquid Crystal Display Co., Ltd., Japan Display Inc.Inventors: Naoki TOKUDA, Hiroshi Kageyama, Masamitsu Furuie
-
Patent number: 8624507Abstract: The present invention overcomes image defects such as the brightness inclination or smears by reducing the line resistance of a power source bus line which supplies electricity to organic EL elements. A plurality of pixels which are arranged in a matrix array is connected to power source lines, and the plurality of power source lines are connected to a power source bus line. Both ends of the power source bus line are connected to a power source part via a FPC. By supplying electricity to both ends of the power source bus line from the power source part, the line resistance of the power source bus line can be reduced.Type: GrantFiled: January 3, 2013Date of Patent: January 7, 2014Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Naoki Tokuda, Hiroshi Kageyama, Masamitsu Furuie
-
Publication number: 20130181618Abstract: The present invention overcomes image defects such as the brightness inclination or smears by reducing the line resistance of a power source bus line which supplies electricity to organic EL elements. A plurality of pixels which are arranged in a matrix array is connected to power source lines, and the plurality of power source lines are connected to a power source bus line. Both ends of the power source bus line are connected to a power source part via a FPC. By supplying electricity to both ends of the power source bus line from the power source part, the line resistance of the power source bus line can be reduced.Type: ApplicationFiled: January 3, 2013Publication date: July 18, 2013Applicants: Panasonic Liquid Crystal Display Co., Ltd., Hitachi Displays, Ltd.Inventors: Naoki TOKUDA, Hiroshi KAGEYAMA, Masamitsu FURUIE