Patents by Inventor Kazunari Fujii

Kazunari Fujii 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: 10040283
    Abstract: A semiconductor device is provided. The device comprises: a first transistor that includes a first primary terminal, a second primary terminal and a first control terminal; a second transistor that includes a third primary terminal, a fourth primary terminal and a second control terminal; and a resistive element. The first and third primary terminal are connected to a first voltage line. The second primary terminal and one terminal of the resistive element are connected to a second voltage line. The first and second control terminal, the fourth primary terminal and the other terminal of the resistive element are connected to a node. A potential change in the third primary terminal is transmitted to the first control terminal by capacitive coupling between the third primary terminal and the node, turning on the first transistor.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: August 7, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kohei Matsumoto, Kazunari Fujii
  • Patent number: 10005278
    Abstract: A semiconductor device is provided. The device comprises: a first transistor that includes a first primary terminal, a second primary terminal and a first control terminal; a second transistor that includes a third primary terminal, a fourth primary terminal and a second control terminal; and a resistive element. The first and third primary terminal are connected to a first voltage line. The second primary terminal and one terminal of the resistive element are connected to a second voltage line. The first and second control terminal, the fourth primary terminal and the other terminal of the resistive element are connected to a node. A potential change in the third primary terminal is transmitted to the first control terminal by capacitive coupling between the third primary terminal and the node, turning on the first transistor.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: June 26, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kohei Matsumoto, Kazunari Fujii
  • Publication number: 20180061826
    Abstract: A semiconductor device includes a transistor connected to a terminal having a first potential, an anti-fuse element connected between the transistor and a terminal having a second potential different from the first potential, and a resistor element connected in parallel with the anti-fuse element. An electric path between the transistor and the anti-fuse element has a length smaller than a length of an electric path between the transistor and the resistor element.
    Type: Application
    Filed: August 29, 2017
    Publication date: March 1, 2018
    Inventors: Kazunari Fujii, Toshio Negishi
  • Publication number: 20180061506
    Abstract: A semiconductor apparatus includes a transistor connected to a first potential terminal having a first potential, an anti-fuse element connected between the transistor and a second potential terminal having a second potential, a resistive element connected in parallel with the anti-fuse element between the transistor and the second potential terminal, and a temperature adjustment unit disposed to face the resistive element.
    Type: Application
    Filed: August 16, 2017
    Publication date: March 1, 2018
    Inventors: Kazunari Fujii, Toshio Negishi
  • Patent number: 9895879
    Abstract: A semiconductor device includes, an anti-fuse element, a transistor connected via the anti-fuse element to a power source terminal which may apply a voltage to the anti-fuse element, an ESD protection element connected to the power source terminal via a node, and a first resistive element disposed in an electric path between the node and the anti-fuse element, wherein resistance of the first resistive element increases with an increase of a voltage applied to the first resistive element.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: February 20, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazunari Fujii, Toshio Negishi
  • Publication number: 20180024353
    Abstract: An optical sensor includes a bare chip mounted on a circuit board, a protection member configured to protect the bare chip, a pad connected to the bare chip via a wire, and a pattern connecting the pad and a terminal portion at an edge of the circuit board to each other. The pattern is connected to the terminal portion on a same surface as a surface on which the bare chip is mounted, and a portion of the pattern between the protection member and the terminal portion is covered with solder resist.
    Type: Application
    Filed: July 19, 2017
    Publication date: January 25, 2018
    Inventors: Shunsuke Tanaka, Kazunari Fujii
  • Publication number: 20170368821
    Abstract: A liquid discharge head substrate, comprising a discharging element configured to discharge a liquid, a driver configured to drive the discharging element, a conductive protection film covering the discharging element via an insulating film, and a controller connected to the protection film and configured to output a control signal that sets the driver in an inactive state when a change of a voltage of the protection film or a change in a current that flows to the protection film is detected.
    Type: Application
    Filed: June 8, 2017
    Publication date: December 28, 2017
    Inventors: Yasuo Fujii, Kazunari Fujii
  • Publication number: 20170291415
    Abstract: A semiconductor device is provided. The device comprises: a first transistor that includes a first primary terminal, a second primary terminal and a first control terminal; a second transistor that includes a third primary terminal, a fourth primary terminal and a second control terminal; and a resistive element. The first and third primary terminal are connected to a first voltage line. The second primary terminal and one terminal of the resistive element are connected to a second voltage line. The first and second control terminal, the fourth primary terminal and the other terminal of the resistive element are connected to a node. A potential change in the third primary terminal is transmitted to the first control terminal by capacitive coupling between the third primary terminal and the node, turning on the first transistor.
    Type: Application
    Filed: March 16, 2017
    Publication date: October 12, 2017
    Inventors: Kohei Matsumoto, Kazunari Fujii
  • Patent number: 9694575
    Abstract: A semiconductor device for a liquid discharge head is provided. The device includes first transistors configured to receive a first voltage at a first terminal and second transistors configured to receive a second voltage at a first terminal. The device further includes discharge elements configured to discharge a liquid. Each discharge element is connected between a second terminal of a first transistor and a second terminal of a second transistor. A first control circuit is configured to supply a first control signal for controlling a conductive state of the first transistors via a common signal. A stabilization circuit is configured to stabilize a voltage of at least one of the second terminal of the first transistor or the control terminal of the first transistor.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: July 4, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazunari Fujii, Tetsunobu Kochi, Wataru Endo, Takaaki Yamaguchi
  • Publication number: 20170173943
    Abstract: A semiconductor device includes, an anti-fuse element, a transistor connected via the anti-fuse element to a power source terminal which may apply a voltage to the anti-fuse element, an ESD protection element connected to the power source terminal via a node, and a first resistive element disposed in an electric path between the node and the anti-fuse element, wherein resistance of the first resistive element increases with an increase of a voltage applied to the first resistive element.
    Type: Application
    Filed: December 19, 2016
    Publication date: June 22, 2017
    Inventors: Kazunari Fujii, Toshio Negishi
  • Patent number: 9555629
    Abstract: A liquid discharge substrate according to an embodiment of the present invention includes a plurality of heating elements, a plurality of driving elements, a signal supplying unit which supplies a control signal used to control the plurality of driving elements, and a plurality of delay circuits which delay the control signal. A delay amount of a first delay circuit is different from a delay amount of a second delay circuit.
    Type: Grant
    Filed: April 27, 2015
    Date of Patent: January 31, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masanori Shibata, Kazunari Fujii, Takaaki Yamaguchi
  • Patent number: 9522529
    Abstract: A substrate includes an AND circuit and an LVC. The AND circuit generates a control signal for switching an NMOS transistor. The LVC controls the gate voltage of the NMOS transistor on the basis of the control signal. The substrate applies a constant gate voltage to a PMOS transistor without using the AND circuit and the LVC.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: December 20, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takaaki Yamaguchi, Toshio Negishi, Taku Yokozawa, Hiroaki Shirakawa, Kazunari Fujii
  • Publication number: 20160355008
    Abstract: A semiconductor device for a liquid discharge head is provided. The device includes first transistors configured to receive a first voltage at a first terminal and second transistors configured to receive a second voltage at a first terminal. The device further includes discharge elements configured to discharge a liquid. Each discharge element is connected between a second terminal of a first transistor and a second terminal of a second transistor. A first control circuit is configured to supply a first control signal for controlling a conductive state of the first transistors via a common signal. A stabilization circuit is configured to stabilize a voltage of at least one of the second terminal of the first transistor or the control terminal of the first transistor.
    Type: Application
    Filed: May 24, 2016
    Publication date: December 8, 2016
    Inventors: Kazunari Fujii, Tetsunobu Kochi, Wataru Endo, Takaaki Yamaguchi
  • Patent number: 9505211
    Abstract: A semiconductor device for a liquid discharge head is provided. The device includes first and second electrodes, discharge elements configured to give energy to a liquid, first switching elements configured to electrically connect first terminals of discharge elements to the first electrode, and including one or more first switching elements each connected to two or more discharge elements, and second switching elements configured to electrically connect second terminals of the plurality of discharge elements to the second electrode, and including one or more second switching element each connected to two or more discharge elements. Two or more discharge elements connected to a same second switching element are connected to different first switching elements.
    Type: Grant
    Filed: March 19, 2015
    Date of Patent: November 29, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kazunari Fujii, Masanobu Ohmura
  • Patent number: 9463618
    Abstract: A liquid discharge substrate includes a plurality of discharge elements disposed on a substrate, a first transistor electrically connected to the plurality of discharge elements, and a plurality of second transistors. The first transistor is disposed between the plurality of discharge elements and the plurality of second transistors.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: October 11, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazunari Fujii, Masanobu Ohmura, Tatsuhito Goden, Wataru Endo
  • Publication number: 20160288494
    Abstract: A substrate includes an AND circuit and an LVC. The AND circuit generates a control signal for switching an NMOS transistor. The LVC controls the gate voltage of the NMOS transistor on the basis of the control signal. The substrate applies a constant gate voltage to a PMOS transistor without using the AND circuit and the LVC.
    Type: Application
    Filed: March 24, 2016
    Publication date: October 6, 2016
    Inventors: Takaaki Yamaguchi, Toshio Negishi, Taku Yokozawa, Hiroaki Shirakawa, Kazunari Fujii
  • Patent number: 9415584
    Abstract: A liquid discharge head substrate is provided. The liquid discharge head substrate includes a discharge unit including a discharge element configured to generate energy for discharging a liquid from an orifice and a discharge control circuit configured to control the discharge element, and a first voltage generation circuit configured to supply, to the discharge control circuit, a first driving voltage for driving the discharge control circuit. The discharge unit includes a first node having a voltage correlated with a voltage to be supplied to the discharge element. The first voltage generation circuit controls the first driving voltage based on a comparison result of the voltage of the first node and a first reference voltage supplied from outside of the liquid discharge head substrate.
    Type: Grant
    Filed: July 6, 2015
    Date of Patent: August 16, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Masanori Shibata, Tatsuhito Goden, Kazunari Fujii
  • Patent number: 9340022
    Abstract: A liquid discharging substrate comprising discharging units, a first pad arranged on a first side, a second pad arranged on a second side, a signal generating unit arranged between the first pad and the second pad, level shifters, for shifting a level of a signal generated by the signal generating unit to output the signal to the discharging units, arranged between the signal generating unit and the second pad, a first wiring line for supplying the signal generating unit with a first reference voltage received by the first pad, and a second wiring line for supplying the level shifters with the second reference voltage received by the second pad, wherein the first wiring line and the second wiring line are isolated from each other between the signal generating unit and the level shifters in a planar view.
    Type: Grant
    Filed: October 19, 2015
    Date of Patent: May 17, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazunari Fujii, Takaaki Yamaguchi
  • Publication number: 20160121608
    Abstract: A liquid discharging substrate comprising discharging units, a first pad arranged on a first side, a second pad arranged on a second side, a signal generating unit arranged between the first pad and the second pad, level shifters, for shifting a level of a signal generated by the signal generating unit to output the signal to the discharging units, arranged between the signal generating unit and the second pad, a first wiring line for supplying the signal generating unit with a first reference voltage received by the first pad, and a second wiring line for supplying the level shifters with the second reference voltage received by the second pad, wherein the first wiring line and the second wiring line are isolated from each other between the signal generating unit and the level shifters in a planar view.
    Type: Application
    Filed: October 19, 2015
    Publication date: May 5, 2016
    Inventors: Kazunari Fujii, Takaaki Yamaguchi
  • Patent number: 9314820
    Abstract: Provided is an ultrasonic detection device including: a capacitive electromechanical transducer including a cell that includes a first electrode and a second electrode disposed so as to oppose with a space; a voltage source for developing a potential difference between the first electrode and the second electrode; and an electric circuit for converting a current, which is caused by a change in electrostatic capacitance between the first electrode and the second electrode due to vibration of the second electrode, into a voltage, in which the capacitive electromechanical transducer provides an output current with a high-pass characteristic having a first cutoff frequency with respect to a frequency, the electric circuit provides an output with a low-pass characteristic having a second cutoff frequency with respect to the frequency, and the second cutoff frequency is smaller than the first cutoff frequency.
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: April 19, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takahiro Akiyama, Makoto Takagi, Kazunari Fujii, Hidemasa Mizutani