Patents by Inventor Tatsuya Ohkubo
Tatsuya Ohkubo 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: 11920077Abstract: No studies have been made regarding what kinds of refrigerants should be used in a refrigeration cycle device for a vehicle. An air conditioner (1) for a vehicle includes a refrigerant circuit (10) and a refrigerant that is sealed in the refrigerant circuit (10). The refrigerant circuit (10) includes a compressor (80), a first heat exchanger (85), which serves as a heat dissipater in a dehumidifying heating mode, an outside-air heat exchanger (82), a cooling control valve (87), and a second heat exchanger (86), which serves as an evaporator in the dehumidifying heating mode. The refrigerant is a refrigerant having a low GWP.Type: GrantFiled: July 16, 2019Date of Patent: March 5, 2024Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Eiji Kumakura, Kazuhiro Furusho, Masaru Tanaka, Shun Ohkubo, Mitsushi Itano, Yuuki Yotsumoto, Akihito Mizuno, Tomoyuki Gotou, Yasufu Yamada, Tatsumi Tsuchiya, Kenji Gobou, Hitomi Kuroki, Daisuke Karube, Tatsuya Takakuwa, Tetsushi Tsuda
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Patent number: 11912922Abstract: A showcase includes a refrigerant circuit and a refrigerant enclosed in the refrigerant circuit. The refrigerant circuit includes a compressor (121), a radiator (122), an expansion valve (123), and an evaporator (124). The refrigerant is a low-GWP refrigerant.Type: GrantFiled: July 16, 2019Date of Patent: February 27, 2024Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Shinichi Fujinaka, Masaru Tanaka, Shun Ohkubo, Mitsushi Itano, Yuuki Yotsumoto, Akihito Mizuno, Tomoyuki Gotou, Yasufu Yamada, Hitomi Kuroki, Tatsumi Tsuchiya, Kenji Gobou, Daisuke Karube, Tatsuya Takakuwa
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Patent number: 7460100Abstract: A liquid crystal display apparatus having a level conversion circuit in which a high speed operation can be attained and also a small transistor capacity can be obtained is provided. In the liquid crystal display apparatus, a signal circuit for driving pixel elements of a display unit and a scanning circuit are provided. The level conversion circuit is constituted of a first and a second transistors 111 and 112 in which a respective gate electrodes is connected to a first bias voltage power supply, and a third and a fourth transistors 121 and 122 in which a respective gate electrodes is connected to a second bias voltage power supply and a respective source electrodes is connected to a power supply.Type: GrantFiled: June 9, 2005Date of Patent: December 2, 2008Assignee: Hitachi, Ltd.Inventors: Hideo Sato, Yoshiro Mikami, Hiroshi Kageyama, Tatsuya Ohkubo
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Patent number: 7230381Abstract: A method of manufacturing a panel assembly is used for making a plasma display panel having electrodes and ribs formed on a substrate. The method includes the steps of forming the electrodes on the substrate so that these electrodes are extended to a periphery of the substrate to form their terminals, applying a terminal protective paste on the terminals for protecting the terminals, applying a rib paste on the entire area of a rib formation region provided on the substrate, molding the rib paste by use of a stamping die having cavities in the form of rib shape into green ribs, and firing the terminal protective paste and the green ribs simultaneously to form a terminal protective layer and ribs on the substrate.Type: GrantFiled: July 7, 2005Date of Patent: June 12, 2007Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Tatsuya Ohkubo, Yoshimi Shirakawa
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Patent number: 7008284Abstract: A method of manufacturing a panel assembly is used for making a plasma display panel having electrodes and ribs formed on a substrate. The method includes the steps of forming the electrodes on the substrate so that these electrodes are extended to a periphery of the substrate to form their terminals, applying a terminal protective paste on the terminals for protecting the terminals, applying a rib paste on the entire area of a rib formation region provided on the substrate, molding the rib paste by use of a stamping die having cavities in the form of rib shape into green ribs, and firing the terminal protective paste and the green ribs simultaneously to form a terminal protective layer and ribs on the substrate.Type: GrantFiled: August 11, 2003Date of Patent: March 7, 2006Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Tatsuya Ohkubo, Yoshimi Shirakawa
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Patent number: 7002212Abstract: To prevent an n-channel thin-film transistor from being deteriorated by hot holes generated in a gate-negative pulse mode. A thin polysilicon film 10 is provided with a p-type semiconductor region 13 in contact with a channel region 14. The p-type semiconductor region 13 is electrically connected to nowhere except the channel region 14. Holes induced on the surface due to a gate-negative pulse are further supplied from the p-type semiconductor region 13. An electric field established by the gate-negative pulse is relaxed by the holes, fewer hot holes are injected into the gate oxide film, and the TFT characteristics are less deteriorated.Type: GrantFiled: July 22, 2003Date of Patent: February 21, 2006Assignee: Hitachi, Ltd.Inventors: Tatsuya Ohkubo, Genshiro Kawachi, Yoshiro Mikami, Kazuhito Masuda, Hiroshi Kageyama
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Publication number: 20060007216Abstract: A liquid crystal display apparatus having a level conversion circuit in which a high speed operation can be attained and also a small transistor capacity can be obtained is provided. In the liquid crystal display apparatus, a signal circuit for driving pixel elements of a display unit and a scanning circuit are provided. The level conversion circuit is constituted of a first and a second transistors 111 and 112 in which a respective gate electrodes is connected to a first bias voltage power supply, and a third and a fourth transistors 121 and 122 in which a respective gate electrodes is connected to a second bias voltage power supply and a respective source electrodes is connected to a power supply.Type: ApplicationFiled: June 9, 2005Publication date: January 12, 2006Inventors: Hideo Sato, Yoshiro Mikami, Hiroshi Kageyama, Tatsuya Ohkubo
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Publication number: 20050245166Abstract: A method of manufacturing a panel assembly is used for making a plasma display panel having electrodes and ribs formed on a substrate. The method includes the steps of forming the electrodes on the substrate so that these electrodes are extended to a periphery of the substrate to form their terminals, applying a terminal protective paste on the terminals for protecting the terminals, applying a rib paste on the entire area of a rib formation region provided on the substrate, molding the rib paste by use of a stamping die having cavities in the form of rib shape into green ribs, and firing the terminal protective paste and the green ribs simultaneously to form a terminal protective layer and ribs on the substrate.Type: ApplicationFiled: July 7, 2005Publication date: November 3, 2005Applicant: Fujitsu Hitachi Plasma Display LimitedInventors: Tatsuya Ohkubo, Yoshimi Shirakawa
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Patent number: 6919873Abstract: A liquid crystal display apparatus having a level conversion circuit in which a high speed operation can be attained and also a small transistor capacity can be obtained is provided. In the liquid crystal display apparatus, a signal circuit for driving pixel elements of a display unit and a scanning circuit are provided. The level conversion circuit is constituted of a first and a second transistors 111 and 112 in which a respective gate electrodes is connected to a first bias voltage power supply, and a third and a fourth transistors 121 and 122 in which a respective gate electrodes is connected to a second bias voltage power supply and a respective source electrodes is connected to a power supply.Type: GrantFiled: March 11, 2004Date of Patent: July 19, 2005Assignee: Hitachi, Ltd.Inventors: Hideo Sato, Yoshiro Mikami, Hiroshi Kageyama, Tatsuya Ohkubo
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Publication number: 20050078073Abstract: A liquid crystal display apparatus having a pair of substrates of which at least one substrate is transparent and a liquid crystal layer sandwiched between the substrates including a plurality of first scanning electrodes formed on one of the substrates, a plurality of signal electrodes intersecting in a matrix form with the plurality of first scanning electrodes, a plurality of second scanning electrodes provided along the first scanning electrodes or the signal electrodes. The display apparatus including within each of the regions surrounded by the plurality of first scanning electrodes and the plurality of signal electrodes: (a) a data holding circuit, signal electrode, and second scanning electrode, (b) a capacitor, (c) a switching device and (d) a display electrode. A drive voltage of the liquid crystal display apparatus is an alternating current voltage having a period which is shorter than a period of fetching by the display data holding circuit.Type: ApplicationFiled: December 3, 2004Publication date: April 14, 2005Inventors: Yoshiro Mikami, Tetsuro Minemura, Makoto Tsumura, Kazuhiro Kuwabara, Shinichi Komura, Tatsuya Ohkubo, Hideo Sato, Shoichi Hirota, Masaya Adachi, Kazuhito Masuda
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Publication number: 20040212752Abstract: To prevent an n-channel thin-film transistor from being deteriorated by hot holes generated in a gate-negative pulse mode. A thin polysilicon film 10 is provided with a p-type semiconductor region 13 in contact with a channel region 14. The p-type semiconductor region 13 is electrically connected to nowhere except the channel region 14. Holes induced on the surface due to a gate-negative pulse are further supplied from the p-type semiconductor region 13. An electric field established by the gate-negative pulse is relaxed by the holes, fewer hot holes are injected into the gate oxide film, and the TFT characteristics are less deteriorated.Type: ApplicationFiled: July 22, 2003Publication date: October 28, 2004Inventors: Tatsuya Ohkubo, Genshiro Kawachi, Yoshiro Mikami, Kazuhito Masuda, Hiroshi Kageyama
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Publication number: 20040196249Abstract: A liquid crystal display apparatus having a level conversion circuit in which a high speed operation can be attained and also a small transistor capacity can be obtained is provided. In the liquid crystal display apparatus, a signal circuit for driving pixel elements of a display unit and a scanning circuit are provided. The level conversion circuit is constituted of a first and a second transistors 111 and 112 in which a respective gate electrodes is connected to a first bias voltage power supply, and a third and a fourth transistors 121 and 122 in which a respective gate electrodes is connected to a second bias voltage power supply and a respective source electrodes is connected to a power supply.Type: ApplicationFiled: March 11, 2004Publication date: October 7, 2004Inventors: Hideo Sato, Yoshiro Mikami, Hiroshi Kageyama, Tatsuya Ohkubo
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Patent number: 6781646Abstract: A liquid crystal display apparatus includes semiconductor elements placed at intersection points between scanning wires and signal wires. Each semiconductor element includes: a semiconductor layer having a channel region and a pair of semiconductor regions which sandwich the channel region and which are each made of a high-resistance region and a low-resistance region; a first electrode formed on the intrinsic semiconductor region with an insulating film interposed therebetween; and second and third electrodes connected to the low-resistance regions. Each scanning wire constitutes the first electrode of the corresponding one of the semiconductor elements. The first electrode has a first wiring formed on the insulating film and second wiring formed in direct contact with a side surface of the first wiring, part of the second wiring being overlaid on part of a high-resistance region with the insulating film interposed therebetween.Type: GrantFiled: March 11, 2003Date of Patent: August 24, 2004Assignee: Hitachi, Ltd.Inventors: Genshiro Kawachi, Tatsuya Ohkubo, Hiroshi Kageyama, Yoshiro Mikami, Kazuhito Masuda
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Patent number: 6714184Abstract: A liquid crystal display apparatus having a level conversion circuit in which a high speed operation can be attained and also a small transistor capacity can be obtained is provided. In the liquid crystal display apparatus, a signal circuit for driving pixel elements of a display unit and a scanning circuit are provided. The level conversion circuit is constituted of a first and a second transistors 111 and 112 in which a respective gate electrodes is connected to a first bias voltage power supply, and a third and a fourth transistors 121 and 122 in which a respective gate electrodes is connected to a second bias voltage power supply and a respective source electrodes is connected to a power supply.Type: GrantFiled: May 21, 2002Date of Patent: March 30, 2004Assignee: Hitachi, Ltd.Inventors: Hideo Sato, Yoshiro Mikami, Hiroshi Kageyama, Tatsuya Ohkubo
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Publication number: 20040043693Abstract: A method of manufacturing a panel assembly is used for making a plasma display panel having electrodes and ribs formed on a substrate. The method includes the steps of forming the electrodes on the substrate so that these electrodes are extended to a periphery of the substrate to form their terminals, applying a terminal protective paste on the terminals for protecting the terminals, applying a rib paste on the entire area of a rib formation region provided on the substrate, molding the rib paste by use of a stamping die having cavities in the form of rib shape into green ribs, and firing the terminal protective paste and the green ribs simultaneously to form a terminal protective layer and ribs on the substrate.Type: ApplicationFiled: August 11, 2003Publication date: March 4, 2004Applicant: Fujitsu Hitachi Plasma Display LimitedInventors: Tatsuya Ohkubo, Yoshimi Shirakawa
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Patent number: 6628261Abstract: A drive circuit for a liquid crystal display apparatus and a large-sized liquid crystal display apparatus integrated with the drive circuit and having a reduced area occupied by the circuits. The drive circuit includes sample/hold circuits for sampling the input voltage at a predetermined timing, comparator circuits for comparing the output of the sample/hold circuits with the voltage of the signal line VD(i), switches for controlling the output voltage of the signal line, a voltage supply circuit constituted as an image signal control circuit for supplying a voltage to the switches, and control circuits for controlling the switches in accordance with the output of the comparator circuits. For the liquid crystal display panel drive circuit configured as described above, the signal line is controlled by the switches, and therefore the area occupied by the drive circuits can be reduced.Type: GrantFiled: February 10, 2000Date of Patent: September 30, 2003Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.Inventors: Hideo Sato, Yoshiro Mikami, Makoto Tsumura, Genshiro Kawachi, Tatsuya Ohkubo, Shigeo Shimomura, Kenkichi Suzuki, Masanao Yamamoto
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Publication number: 20030169381Abstract: A liquid crystal display apparatus includes semiconductor elements placed at intersection points between scanning wires and signal wires. Each semiconductor element includes: a semiconductor layer having a channel region and a pair of semiconductor regions which sandwich the channel region and which are each made of a high-resistance region and a low-resistance region; a first electrode formed on the intrinsic semiconductor region with an insulating film interposed therebetween; and second and third electrodes connected to the low-resistance regions. Each scanning wire constitutes the first electrode of the corresponding one of the semiconductor elements. The first electrode has a first wiring formed on the insulating film and second wiring formed in direct contact with a side surface of the first wiring, part of the second wiring being overlaid on part of a high-resistance region with the insulating film interposed therebetween.Type: ApplicationFiled: March 11, 2003Publication date: September 11, 2003Inventors: Genshiro Kawachi, Tatsuya Ohkubo, Hiroshi Kageyama, Yoshiro Mikami, Kazuhito Masuda
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Patent number: 6611300Abstract: To prevent an n-channel thin-film transistor from being deteriorated by hot holes generated in a gate-negative pulse mode. A thin polysilicon film 10 is provided with a p-type semiconductor region 13 in contact with a channel region 14. The p-type semiconductor region 13 is electrically connected to nowhere except the channel region 14. Holes induced on the surface due to a gate-negative pulse are further supplied from the p-type semiconductor region 13. An electric field established by the gate-negative pulse is relaxed by the holes, fewer hot holes are injected into the gate oxide film, and the TFT characteristics are less deteriorated.Type: GrantFiled: October 24, 2000Date of Patent: August 26, 2003Assignee: Hitachi, Ltd.Inventors: Tatsuya Ohkubo, Genshiro Kawachi, Yoshiro Mikami, Kazuhito Masuda, Hiroshi Kageyama
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Patent number: 6559906Abstract: A liquid crystal display apparatus includes semiconductor elements placed at intersection points between scanning wires and signal wires. Each semiconductor element includes: a semiconductor layer having a channel region and a pair of semiconductor regions which sandwich the channel region and which are each made of a high-resistance region and a low-resistance region; a first electrode formed on the intrinsic semiconductor region with an insulating film interposed therebetween; and second and third electrodes connected to the low-resistance regions. Each scanning wire constitutes the first electrode of the corresponding one of the semiconductor elements. The first electrode has a first wiring formed on the insulating film and second wiring formed in direct contact with a side surface of the first wiring, part of the second wiring being overlaid on part of a high-resistance region with the insulating film interposed therebetween.Type: GrantFiled: July 28, 2000Date of Patent: May 6, 2003Assignee: Hitachi, Ltd.Inventors: Genshiro Kawachi, Tatsuya Ohkubo, Hiroshi Kageyama, Yoshiro Mikami, Kazuhito Masuda
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Patent number: 6392625Abstract: A liquid crystal display apparatus including a level conversion circuit in which a high speed operation can be attained and also a small transistor capacity can be obtained. In the liquid crystal display apparatus, a signal circuit for driving pixel elements of a display unit and a scanning circuit are provided. The level conversion circuit is constituted of first and second transistors 111 and 112, the respective gate electrodes of which are connected to a first bias voltage power supply, and third and fourth transistors 121 and 122, the respective gate electrodes of which are connected to a second bias voltage power supply and the respective source electrodes of which are connected to a power supply. The drain electrodes of the first and the second transistors 111 and 112 are connected to the respective drain electrodes of the third and the fourth transistors 121 and 122.Type: GrantFiled: June 22, 1999Date of Patent: May 21, 2002Assignee: Hitachi, Ltd.Inventors: Hideo Sato, Yoshiro Mikami, Hiroshi Kageyama, Tatsuya Ohkubo