Patents by Inventor Hideo Kurokawa
Hideo Kurokawa 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: 9013090Abstract: An actuator includes an electrolytic layer, a first electrode layer, and a second electrode layer. The electrolytic layer includes a polymer and an ionic liquid included in the polymer. When a voltage that makes the first electrode layer a positive side is applied, the actuator deforms to be in a drive state, thereby driving a protruding member. In a period other than a drive period in which the protruding member is driven, a reverse voltage that makes the first electrode layer a negative side is applied, thereby rectifying the tendency of the actuator to bow or the like.Type: GrantFiled: September 7, 2012Date of Patent: April 21, 2015Assignee: Alps Electric Co., Ltd.Inventors: Isao Takahashi, Hideo Kurokawa
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Publication number: 20120326564Abstract: An actuator includes an electrolytic layer, a first electrode layer, and a second electrode layer. The electrolytic layer includes a polymer and an ionic liquid included in the polymer. When a voltage that makes the first electrode layer a positive side is applied, the actuator deforms to be in a drive state, thereby driving a protruding member. In a period other than a drive period in which the protruding member is driven, a reverse voltage that makes the first electrode layer a negative side is applied, thereby rectifying the tendency of the actuator to bow or the like.Type: ApplicationFiled: September 7, 2012Publication date: December 27, 2012Applicant: ALPS ELECTRIC CO., LTD.Inventors: Isao TAKAHASHI, Hideo KUROKAWA
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Patent number: 7227519Abstract: In conventional methods of correction luminance in displays, it has been necessary to interrupt video display during use in order to carry out correction. This is a problem in that interruptions are not good for workability from the perspective of the user of the image display device. In consideration of this, the present invention realizes a display without non-uniformity in illumination with respect to both initial characteristics and change over time by measuring anode current of an FED and creating a luminance correction memory. In addition, by illuminating arbitrary pixels during video idle periods, capturing the luminance information from the pixels, and renewing a correction memory based on this luminance information, correction for change over time is possible without interrupting video display. Thus, a display device that can maintain high quality images is provided.Type: GrantFiled: October 4, 2000Date of Patent: June 5, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Toru Kawase, Hideo Kurokawa, Koji Akiyama, Tetsuya Shiratori
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Publication number: 20060238098Abstract: A cathode ray tube includes an electron gun for emitting at least one electron beam; a mask frame include a mask having a plurality of holes or slits for allowing the electron beam to be transmitted therethrough and a frame to which the mask is attached; and a panel including a phosphor layer to be scanned by the at least one electron beam transmitted through the plurality of holes or slits of the mask. The panel includes a plurality of stud pins for supporting the frame. The frame includes a plurality of elastic supports engaged with the plurality of stud pins. At least one of the plurality of elastic supports includes an engagement portion having an engaging hole which is engaged with one of the plurality of the stud pins and an elastic portion in contact with the one stud pin. Mask frame vibration causes the elastic portion to rub against a respective stud pin so as to generate a frictional force for attenuating the vibration of the mask frame.Type: ApplicationFiled: January 25, 2006Publication date: October 26, 2006Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Koji AKIYAMA, Hideo KUROKAWA, Michiaki WATANABE, Toshifumi NAKATANI
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Publication number: 20060238099Abstract: A cathode ray tube includes an electron gun for emitting at least one electron beam; a mask frame include a mask having a plurality of holes or slits for allowing the electron beam to be transmitted therethrough and a frame to which the mask is attached; and a panel including a phosphor layer to be scanned by the at least one electron beam transmitted through the plurality of holes or slits of the mask. The panel includes a plurality of stud pins for supporting the frame. The frame includes a plurality of elastic supports engaged with the plurality of stud pins. At least one of the plurality of elastic supports includes an engagement portion having an engaging hole which is engaged with one of the plurality of the stud pins and an elastic portion in contact with the one stud pin. Mask frame vibration causes the elastic portion to rub against a respective stud pin so as to generate a frictional force for attenuating the vibration of the mask frame.Type: ApplicationFiled: January 25, 2006Publication date: October 26, 2006Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Koji AKIYAMA, Hideo KUROKAWA, Michiaki WATANABE, Toshifumi NAKATANI
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Patent number: 7023129Abstract: A cathode ray tube includes an electron gun for emitting at least one electron beam; a mask frame include a mask having a plurality of holes or slits for allowing the electron beam to be transmitted therethrough and a frame to which the mask is attached; and a panel including a phosphor layer to be scanned by the at least one electron beam transmitted through the plurality of holes or slits of the mask. The panel includes a plurality of stud pins for supporting the frame. The frame includes a plurality of elastic supports engaged with the plurality of stud pins. At least one of the plurality of elastic supports includes an engagement portion having an engaging hole which is engaged with one of the plurality of the stud pins and an elastic portion in contact with the one stud pin. Mask frame vibration causes the elastic portion to rub against a respective stud pin so as to generate a frictional force for attenuating the vibration of the mask frame.Type: GrantFiled: October 20, 2000Date of Patent: April 4, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Koji Akiyama, Hideo Kurokawa, Michiaki Watanabe, Toshifumi Nakatani
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Patent number: 6972513Abstract: An object of the present invention is to provide electron emission devices having improved electron convergence. To this end, an electron emission device of the present invention is such that a cathode electrode, an insulating layer, and a gate electrode are layered on a substrate in an order; an electron emission layer is in a first hole on the substrate penetrating from the gate electrode through the cathode electrode; an upper surface of the electron emission layer is between an upper surface of the substrate and a boundary between the cathode electrode and the insulating layer; at least one of a side surface and a lower surface except for a central area of the electron emission layer contacts the cathode electrode. By such an electron emission device, electrons are emitted mainly from the peripheral area of the electron emission layer. Accordingly, the electron convergence is improved.Type: GrantFiled: July 16, 2001Date of Patent: December 6, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Tetsuya Shiratori, Koji Akiyama, Hideo Kurokawa
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Patent number: 6914372Abstract: Disclosed are an electron-emitting element having a large operating current at a low operating voltage and excellent operation stability, and an electron source, an image display device and the like utilizing such an electron-emitting element, and further a method of fabricating such an element with few process steps at low cost. A cold cathode member is configured utilizing hybrid particle of a first particle serving to emit electrons into the space and a second particle being in the vicinity of the first particle and serving to control the position of the first particle. In this configuration, it is preferable that the first particle have a higher electron emission efficiency than the second particle and that the second particle be conductive.Type: GrantFiled: October 12, 2000Date of Patent: July 5, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Koji Akiyama, Tetsuya Shiratori, Hideo Kurokawa, Toru Kawase
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Patent number: 6827624Abstract: The first basic structure of the electron emission element of the present invention includes at least two electrodes disposed in a horizontal direction at a predetermined interval, and a plurality of electron emission portions made of a particle or an aggregate of the particles dispersively disposed between the electrodes. On the other hand, the second basic structure of the electron emission element of the present invention includes at least two electrodes disposed at a predetermined interval, a conductive layer disposed between the electrodes so as to be electrically connected thereto, and a plurality of electron emission portions made of a particle or an aggregate of the particles dispersively disposed on the surface of the conductive layer between the electrodes.Type: GrantFiled: July 15, 2002Date of Patent: December 7, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hideo Kurokawa, Tetsuya Shiratori, Toshifumi Sato, Masahiro Deguchi, Makoto Kitabatake
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Patent number: 6762546Abstract: An elastic support member 5 or an elastic support member-holding plate is located substantially in the middle portion of a frame portion (1 and 2), and a shadow mask is constructed such that a tension in the middle portion of the shadow mask 3 is larger than the tension in the edge portions of the shadow mask 3. In another aspect, a plurality of elastic support members 5 are such that at least two elastic support members having substantially different spring constants are combined.Type: GrantFiled: March 7, 2002Date of Patent: July 13, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hideo Kurokawa, Koji Akiyama, Michiaki Watanabe, Toshifumi Nakatani, Hideo Suzuki, Shigeru Ohki
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Patent number: 6692327Abstract: An electron emission element includes a substrate, a cathode electrode formed on the substrate, an anode electrode disposed so as to be opposed to the cathode electrode, an electron emission member disposed on the cathode electrode, a control electrode disposed between the cathode electrode and the anode electrode, and an insulating layer. The electron emission member includes a first member having a hole and a second member filling the hole, wherein the second member is more likely to emit electrons than the first member.Type: GrantFiled: January 11, 2000Date of Patent: February 17, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Masahiro Deguchi, Makoto Kitabatake, Kanji Imai, Tomohiro Sekiguchi, Hideo Kurokawa, Keisuke Koga, Tetsuya Shiratori, Toru Kawase
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Publication number: 20040012327Abstract: An object of the present invention is to provide electron emission devices having improved electron convergence.Type: ApplicationFiled: January 14, 2003Publication date: January 22, 2004Inventors: Tetsuya W. Shiratori, Koji Akiyama, Hideo Kurokawa
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Patent number: 6645402Abstract: An electron emitting device includes at least a first electrode and an electron emitting section provided on the first electrode. The electron emitting section is formed of a particle or an aggregate of particles. The particle contains a carbon material having a carbon six-membered ring structure. The carbon material having a carbon six-membered ring structure contains, for example, graphite or a carbon nanotube as a main component.Type: GrantFiled: June 30, 2000Date of Patent: November 11, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hideo Kurokawa, Tetsuya Shiratori, Masahiro Deguchi, Makoto Kitabatake
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Patent number: 6635979Abstract: An electron emitting device includes at least an electron transporting member (1), an electron emitting member (3), and an electric field concentration region (2) formed between the electron transporting member (1) and the electron emitting member (3). For example, the electron transporting member (1) may be a conductive layer, the electric field concentration region (2) may be formed of an insulating layer formed on the conductive layer, and the electron emitting member (3) may be formed of particles provided on the insulating layer. Due to the electric field concentration in the electric field concentration region (2), electrons are easily injected from the electron transporting member (1) to the electron emitting member (3).Type: GrantFiled: September 25, 2000Date of Patent: October 21, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Tetsuya Shiratori, Hideo Kurokawa, Masahiro Deguchi, Makoto Kitabatake
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Patent number: 6606442Abstract: An optical waveguide component has a first optical member in which a predetermined first core pattern groove is formed and a second optical member in which a predetermined second core pattern groove is formed, the first and second optical members being combined together so that said first and second core pattern grooves are opposingly overlapped with each other, and the first and second core pattern grooves being filled with a core material.Type: GrantFiled: September 19, 2001Date of Patent: August 12, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Tsuguhiro Korenaga, Hiroyuki Asakura, Hideo Kurokawa
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Publication number: 20020193039Abstract: The first basic structure of the electron emission element of the present invention includes at least two electrodes disposed in a horizontal direction at a predetermined interval, and a plurality of electron emission portions made of a particle or an aggregate of the particles dispersively disposed between the electrodes. On the other hand, the second basic structure of the electron emission element of the present invention includes at least two electrodes disposed at a predetermined interval, a conductive layer disposed between the electrodes so as to be electrically connected thereto, and a plurality of electron emission portions made of a particle or an aggregate of the particles dispersively disposed on the surface of the conductive layer between the electrodes.Type: ApplicationFiled: July 15, 2002Publication date: December 19, 2002Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Hideo Kurokawa, Tetsuya Shiratori, Toshifumi Sato, Masahiro Deguchi, Makoto Kitabatake
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Patent number: 6486609Abstract: An electron-emitting element is provided which lessens the necessary voltage to be applied to a grid electrode and accurately and precisely controls electron emission from a cathode electrode. This is achieved by a field emission type electron-emitting element wherein an electric field existing between the grid electrode (3) and an anode electrode emanates from an electron passage opening in the grid electrode (3) to the cathode electrode (2) side and interacts with an electric field existing between the cathode electrode (2) and the grid electrode (3) such that a combined electric field is formed, and an electron-emission controlling element is provided which varies the intensity of the combined electric field by varying the potential of at least one of the cathode electrode (2), the anode electrode, and the grid electrode (3).Type: GrantFiled: September 14, 2001Date of Patent: November 26, 2002Assignee: Matsushita Electric Industries, Inc.Inventors: Tetsuya Shiratori, Hideo Kurokawa, Koji Akiyama
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Patent number: 6445114Abstract: The first basic structure of the electron emission element of the present invention, includes at least two electrodes disposed in a horizontal direction at a predetermined interval, and a plurality of electron emission portions made of a particle or an aggregate of the particles dispersively disposed between the electrodes. On the other hand, the second basic structure of the electron emission element of the present invention includes at least two electrodes disposed at a predetermined interval, a conductive layer disposed between the electrodes so as to be electrically connected thereto, and a plurality of electron emission portions made of a particle or an aggregate of the particles dispersively disposed on the surface of the conductive layer between the electrodes.Type: GrantFiled: December 10, 1999Date of Patent: September 3, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hideo Kurokawa, Tetsuya Shiratori, Toshifumi Sato, Masahiro Deguchi, Makoto Kitabatake
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Patent number: 6400091Abstract: An electron emission element of the present invention includes a substrate, a cathode formed on the substrate, an anode opposed to the cathode, an electron emission member disposed on the cathode, and a control electrode disposed between the cathode and the anode. During operation, the electric field intensity immediately above the electron emission member is lower than that between the control electrode and the anode. Alternatively, the spatial average of an electric field intensity between the electron emission member and the control electrode is smaller than that between the control electrode and the anode.Type: GrantFiled: March 14, 2000Date of Patent: June 4, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Masahiro Deguchi, Makoto Kitabatake, Kanji Imai, Tomohiro Sekiguchi, Hideo Kurokawa, Keisuke Koga, Tetsuya Shiratori, Toru Kawase
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Publication number: 20020018634Abstract: An optical waveguide component has a first optical member in which a predetermined first core pattern groove is formed and a second optical member in which a predetermined second core pattern groove is formed, the first and second optical members being combined together so that said first and second core pattern grooves are opposingly overlapped with each other, and the first and second core pattern grooves being filled with a core material.Type: ApplicationFiled: September 19, 2001Publication date: February 14, 2002Inventors: Tsuguhiro Korenaga, Hiroyuki Asakura, Hideo Kurokawa