Patents by Inventor Tomohiro Hirakawa

Tomohiro Hirakawa 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).

  • Publication number: 20210305147
    Abstract: A semiconductor device according to an embodiment includes: an insulating substrate having a first metal layer and a second metal layer on a surface of the insulating substrate; a semiconductor chip including an upper electrode and a lower electrode, the upper electrode being electrically connected to the first metal layer, the lower electrode being electrically connected to the second metal layer; a first main terminal including a first end and a second end, the first end being electrically connected to the first metal layer; a second main terminal including a third end and a fourth end, the third end being electrically connected to the second metal layer; a first detection terminal being electrically connected between the first end and the second end of the first main terminal; and a second detection terminal being electrically connected to the first metal layer.
    Type: Application
    Filed: August 24, 2020
    Publication date: September 30, 2021
    Inventors: Tomohiro IGUCHI, Tatsuya HIRAKAWA
  • Publication number: 20210305204
    Abstract: A semiconductor device according to an embodiment includes a semiconductor layer, a metal layer, and a bonding layer provided between the semiconductor layer and the metal layer, the bonding layer including a plurality of silver particles, and the bonding layer including a region containing gold existing between the plurality of silver particles.
    Type: Application
    Filed: August 31, 2020
    Publication date: September 30, 2021
    Inventors: Makoto MIZUKAMI, Tatsuya HIRAKAWA, Tomohiro IGUCHI
  • Publication number: 20210288583
    Abstract: A DC power supply circuit includes a voltage regulator circuit, a transformer including a primary winding, a transistor connected to the primary winding and alternately repeating switching on and off of a current, a rectifier circuit connected to a secondary winding and converting a voltage output from the secondary winding into a DC voltage, and a control circuit for controlling an on/off duty ratio of the transistor according to a target voltage. When the target voltage is included in a first voltage range, the control circuit sets the duty ratio to be constant, and a transistor of the regulator circuit operates in a linear region. When the target voltage is included in a second voltage range higher than the first voltage range, the control circuit changes the duty ratio according to the target voltage, and the transistor operates in a saturation region.
    Type: Application
    Filed: June 12, 2019
    Publication date: September 16, 2021
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventor: Tomohiro HIRAKAWA
  • Patent number: 10372248
    Abstract: The semiconductor device is intended for connection with an in-cell type display touch panel having a plurality of common electrodes, a reference voltage for display is applied to the common electrodes in a display drive period, and the common electrodes serve as sensor electrodes in a touch detection period. The semiconductor device includes a DC level shift circuit operable to shift the DC level of a toggle signal output by a toggle drive circuit to the reference voltage. The semiconductor device supplies the reference voltage to the common electrodes of the display touch panel in the display drive period, and performs a guarding action in which at least a part of the plurality of common electrodes is supplied with a toggle signal shifted in DC level in the touch detection period.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: August 6, 2019
    Assignee: SYNAPTICS INCORPORATED
    Inventors: Kazuya Endo, Shinobu Nohtomi, Nobukazu Tanaka, Tomohiro Hirakawa, Hiroshi Takeyama, Takayuki Noto, Petr Shepelev
  • Publication number: 20180107309
    Abstract: The semiconductor device is intended for connection with an in-cell type display touch panel having a plurality of common electrodes, a reference voltage for display is applied to the common electrodes in a display drive period, and the common electrodes serve as sensor electrodes in a touch detection period. The semiconductor device includes a DC level shift circuit operable to shift the DC level of a toggle signal output by a toggle drive circuit to the reference voltage. The semiconductor device supplies the reference voltage to the common electrodes of the display touch panel in the display drive period, and performs a guarding action in which at least a part of the plurality of common electrodes is supplied with a toggle signal shifted in DC level in the touch detection period.
    Type: Application
    Filed: October 19, 2016
    Publication date: April 19, 2018
    Inventors: Kazuya ENDO, Shinobu NOHTOMI, Nobukazu TANAKA, Tomohiro HIRAKAWA, Hiroshi TAKEYAMA, Takayuki NOTO, Petr SHEPELEV
  • Patent number: 9518384
    Abstract: A flush toilet includes: a bowl portion having a waste-receiving surface, a rim and a recess; a rim spout portion configured to spout flush water to form a swirl flow which swirlingly flows along the inner peripheral surface; a drainage conduit having an inlet connecting with the recess to discharge waste therethrough, wherein the waste-receiving surface of the bowl portion is composed of a left waste-receiving sub-surface and a right waste-receiving sub-surface defined, respectively, on both sided of a center line with respect to a lateral direction of the bowl portion, the left waste-receiving sub-surface and the right waste-receiving sub-surface are formed, respectively, in different shapes in a front region of the bowl portion so as to allow flush water spouted from the rim spout portion to form a major stream which flows from a front end of the bowl portion into the recess.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: December 13, 2016
    Assignee: TOTO LTD.
    Inventors: Shu Kashirajima, Tomohiro Hirakawa, Masaki Kitamura, Yuki Shinohara, Yuki Shimokawa
  • Patent number: 9359753
    Abstract: A flush toilet which including a bowl portion having a waste-receiving surface, a rim and a recess; a water spouting portion for spouting the flush water forwardly; and a drainage conduit. The recess of the bowl portion has a bottom below a pooled water level, and a wall surface connecting between the bottom and a lower edge of the waste-receiving surface, wherein the bottom of the recess has a front bottom surface and a rear bottom surface. The bowl portion is configured to allow flush water to form a major stream which is directed to flow from an front end of the bowl portion toward the inlet of the drainage conduit, and the rear bottom surface of the bottom is configured to allow a part of the major stream to collide therewith, and then guide the collided major stream to a front region inside the drainage conduit.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: June 7, 2016
    Assignee: TOTO LTD.
    Inventors: Tomohiro Hirakawa, Masaki Kitamura, Shu Kashirajima, Yuki Shinohara, Koji Kamei
  • Patent number: 9157225
    Abstract: A flush toilet which includes: a bowl portion having a waste-receiving surface, a rim and a recess; a first rim spout portion which spouts flush water toward a front end of the bowl portion so as to form a swirl flow; and a second rim spout portion which spouts flush water so as to form a swirl flow having a same flow direction as that of the swirl flow formable by the first rim spout portion. The bowl portion is configured to allow flush water spouted from the first rim spout portion to form a major stream which flows from the front end of the bowl portion into the recess, and allow flush water spouted from the second rim spout portion to flow into the recess from a lateral side of the bowl portion and then merge with the major stream M.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: October 13, 2015
    Assignee: TOTO LTD.
    Inventors: Shu Kashirajima, Tomohiro Hirakawa, Masaki Kitamura, Yuki Shinohara, Koji Kamei
  • Publication number: 20150275494
    Abstract: A flush toilet includes: a bowl portion having a waste-receiving surface, a rim and a recess; a rim spout portion configured to spout flush water to form a swirl flow which swirlingly flows along the inner peripheral surface; a drainage conduit having an inlet connecting with the recess to discharge waste therethrough, wherein the waste-receiving surface of the bowl portion is composed of a left waste-receiving sub-surface and a right waste-receiving sub-surface defined, respectively, on both sided of a center line with respect to a lateral direction of the bowl portion, the left waste-receiving sub-surface and the right waste-receiving sub-surface are formed, respectively, in different shapes in a front region of the bowl portion so as to allow flush water spouted from the rim spout portion to form a major stream which flows from a front end of the bowl portion into the recess.
    Type: Application
    Filed: February 27, 2015
    Publication date: October 1, 2015
    Inventors: Shu KASHIRAJIMA, Tomohiro HIRAKAWA, Masaki KITAMURA, Yuki SHINOHARA, Yuki SHIMOKAWA
  • Publication number: 20150082531
    Abstract: A flush toilet which includes: a bowl portion having a waste-receiving surface, a rim and a recess; a first rim spout portion which spouts flush water toward a front end of the bowl portion so as to form a swirl flow; and a second rim spout portion which spouts flush water so as to form a swirl flow having a same flow direction as that of the swirl flow formable by the first rim spout portion. The bowl portion is configured to allow flush water spouted from the first rim spout portion to form a major stream which flows from the front end of the bowl portion into the recess, and allow flush water spouted from the second rim spout portion to flow into the recess from a lateral side of the bowl portion and then merge with the major stream M.
    Type: Application
    Filed: March 26, 2014
    Publication date: March 26, 2015
    Applicant: TOTO LTD.
    Inventors: Shu KASHIRAJIMA, Tomohiro HIRAKAWA, Masaki KITAMURA, Yuki SHINOHARA, Koji KAMEI
  • Publication number: 20140289947
    Abstract: A flush toilet which including a bowl portion having a waste-receiving surface, a rim and a recess; a water spouting portion for spouting the flush water forwardly; and a drainage conduit. The recess of the bowl portion has a bottom below a pooled water level, and a wall surface connecting between the bottom and a lower edge of the waste-receiving surface, wherein the bottom of the recess has a front bottom surface and a rear bottom surface. The bowl portion is configured to allow flush water to form a major stream which is directed to flow from an front end of the bowl portion toward the inlet of the drainage conduit, and the rear bottom surface of the bottom is configured to allow a part of the major stream to collide therewith, and then guide the collided major stream to a front region inside the drainage conduit.
    Type: Application
    Filed: March 26, 2014
    Publication date: October 2, 2014
    Applicant: TOTO LTD.
    Inventors: Tomohiro HIRAKAWA, Masaki KITAMURA, Shu KASHIRAJIMA, Yuki SHINOHARA, Koji KAMEI
  • Patent number: 8640272
    Abstract: A flush toilet bowl includes: a bowl portion including a pooling portion in communication with a drain conduit; a rim surface provided above the bowl portion; and a first slit opening configured to spout flush water supplied through a first conduit toward the bowl portion and to spout the supplied flush water in a generally tangential direction of the rim surface, thereby generating a swirling flow flowing forward near a boundary between the rim surface and the bowl portion. A slit opening shape in a cross section generally perpendicular to a flow direction of water flow spouted from the first slit opening is horizontally flattened. There is provided a flush toilet bowl capable of minimizing the overhang of the rim portion.
    Type: Grant
    Filed: September 22, 2008
    Date of Patent: February 4, 2014
    Assignee: Toto Ltd
    Inventors: Tomoaki Morita, Toshifumi Yoneda, Tomohiro Hirakawa
  • Publication number: 20100186158
    Abstract: A flush toilet bowl includes: a bowl portion including a pooling portion in communication with a drain conduit; a rim surface provided above the bowl portion; and a first slit opening configured to spout flush water supplied through a first conduit toward the bowl portion and to spout the supplied flush water in a generally tangential direction of the rim surface, thereby generating a swirling flow flowing forward near a boundary between the rim surface and the bowl portion. A slit opening shape in a cross section generally perpendicular to a flow direction of water flow spouted from the first slit opening is horizontally flattened. There is provided a flush toilet bowl capable of minimizing the overhang of the rim portion.
    Type: Application
    Filed: September 22, 2008
    Publication date: July 29, 2010
    Applicant: TOTO LTD.
    Inventors: Tomoaki Morita, Toshifumi Yoneda, Tomohiro Hirakawa
  • Patent number: 7325258
    Abstract: Providing a flush toilet wherein the amount of water supplied to the jet hole and the amount of water supplied to the rim section are independently controlled. The present invention is a flush toilet (1) for supplying flushwater from a flushwater tank, the flush toilet comprising a bowl section (2) at the bottom portion of which is formed a jet hole; a jet flushwater tank (10) for storing flushwater to be supplied from the jet hole; a jet drain valve (14) disposed on the jet flushwater tank; a jet water conduit (18) for conducting flushwater which has passed through the jet drain valve to the jet hole; a rim section (4) disposed on the upper portion of the bowl section; a rim flushwater tank (8) for storing flushwater supplied to the rim section; a rim drain valve (12) disposed on the rim flushwater tank; and a rim water conduit (16) for conducting flushwater passed through the rim drain valve to the rim section.
    Type: Grant
    Filed: September 7, 2006
    Date of Patent: February 5, 2008
    Assignee: Toto Ltd.
    Inventors: Kyoji Asada, Toshifumi Yoneda, Tomohiro Hirakawa
  • Publication number: 20070168556
    Abstract: Electronic data is delivered by using the secret sharing method. A transmission source device divides the electronic data into a predetermined number of partial data by using the secret sharing method and creates an arbitrary number of auxiliary data corresponding to the predetermined number of partial data and having information required for calculating the total number of the auxiliary data and the partial data. These are transmitted to a transmission destination device as a transmission destination of the electronic data via a network. The transmission destination device stores reception data containing a plurality of partial data and the auxiliary data in a storage device and restores the electronic data as the source data before the division from the partial data if the partial data and the auxiliary data has not been tampered.
    Type: Application
    Filed: October 3, 2006
    Publication date: July 19, 2007
    Applicant: Hitachi, Ltd.
    Inventors: Koichi Tanimoto, Tomohiro Hirakawa, Masahiro Kumamoto, Kazuhiko Taniguchi
  • Publication number: 20070061955
    Abstract: Providing a flush toilet wherein the amount of water supplied to the jet hole and the amount of water supplied to the rim section are independently controlled. The present invention is a flush toilet (1) for supplying flushwater from a flushwater tank, the flush toilet comprising a bowl section (2) at the bottom portion of which is formed a jet hole; a jet flushwater tank (10) for storing flushwater to be supplied from the jet hole; a jet drain valve (14) disposed on the jet flushwater tank; a jet water conduit (18) for conducting flushwater which has passed through the jet drain valve to the jet hole; a rim section (4) disposed on the upper portion of the bowl section; a rim flushwater tank (8) for storing flushwater supplied to the rim section; a rim drain valve (12) disposed on the rim flushwater tank; and a rim water conduit (16) for conducting flushwater passed through the rim drain valve to the rim section.
    Type: Application
    Filed: September 7, 2006
    Publication date: March 22, 2007
    Applicant: TOTO LTD.
    Inventors: Kyoji Asada, Toshifumi Yoneda, Tomohiro Hirakawa