Patents by Inventor Shigeaki Kawano

Shigeaki Kawano 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: 10037731
    Abstract: A driver includes a power supply circuit including a voltage boosting circuit that generates a boosted voltage by performing a voltage boosting operation, and a driving circuit that receives a power supply from the power supply circuit, and samples a driving voltage to drive a display panel. The voltage boosting circuit has a voltage boosting unit having a voltage boosting transistor, and a voltage boosting control circuit that outputs a voltage boosting clock signal to the voltage boosting unit. The voltage boosting control circuit stops the voltage boosting clock signal in a first period that includes a timing of an end of a sampling period of the driving circuit.
    Type: Grant
    Filed: February 29, 2016
    Date of Patent: July 31, 2018
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Shigeaki Kawano
  • Patent number: 9997116
    Abstract: An integrated circuit device that drives an electro-optical panel using a driving waveform which is set in a plurality of phases includes: a driving voltage generation unit that operates while receiving a supply of a power supply voltage generated by a power supply circuit, and generates a plurality of driving voltages to be applied to a plurality of electrodes in the electro-optical panel in each of a plurality of phases, in accordance with display data; and a power supply control unit that sets current supply capability of the power supply circuit to a first level synchronously with a timing of start of a phase, and sets the current supply capability to a second level, which is lower than the first level.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: June 12, 2018
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Kota Muto, Shigeaki Kawano
  • Publication number: 20160260385
    Abstract: A driver includes a power supply circuit including a voltage boosting circuit that generates a boosted voltage by performing a voltage boosting operation, and a driving circuit that receives a power supply from the power supply circuit, and samples a driving voltage to drive a display panel. The voltage boosting circuit has a voltage boosting unit having a voltage boosting transistor, and a voltage boosting control circuit that outputs a voltage boosting clock signal to the voltage boosting unit. The voltage boosting control circuit stops the voltage boosting clock signal in a first period that includes a timing of an end of a sampling period of the driving circuit.
    Type: Application
    Filed: February 29, 2016
    Publication date: September 8, 2016
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Shigeaki KAWANO
  • Publication number: 20160247458
    Abstract: An integrated circuit device that drives an electro-optical panel using a driving waveform which is set in a plurality of phases includes: a driving voltage generation unit that operates while receiving a supply of a power supply voltage generated by a power supply circuit, and generates a plurality of driving voltages to be applied to a plurality of electrodes in the electro-optical panel in each of a plurality of phases, in accordance with display data; and a power supply control unit that sets current supply capability of the power supply circuit to a first level synchronously with a timing of start of a phase, and sets the current supply capability to a second level, which is lower than the first level.
    Type: Application
    Filed: February 19, 2016
    Publication date: August 25, 2016
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Kota MUTO, Shigeaki KAWANO
  • Patent number: 9378447
    Abstract: A circuit device includes: a first storage control unit which receives power from a power receiving unit which receives power by electromagnetic induction, to perform control of storing charge in a first charge storage unit; a second storage control unit which performs control of storing charge in a second charge storage unit; and a power source supply unit which supplies power source to a system device based on charges stored in the first charge storage unit and the second charge storage unit. The second charge storage unit is a charge storage unit whose charge storage capacitance is smaller than that of the first charge storage unit. The power source supply unit supplies, at the time of system start-up after the start of power reception, power source based on the stored charge of the second charge storage unit to the system device.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: June 28, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Kota Onishi, Nobutaka Shiozaki, Masaya Ninomiya, Shigeaki Kawano
  • Patent number: 8957884
    Abstract: An integrated circuit device includes: a driving voltage output unit that outputs a driving voltage supplied to a segment electrode of an electro-optical panel; a display data storage unit that stores display data; and a driving waveform information output unit that outputs driving waveform information when a display state of the segment electrode is changed from a first display state corresponding to first display data to a second display state corresponding to second display data, wherein the driving voltage output unit outputs the driving voltage specified by the first display data and the second display data from the display data storage unit, and the driving waveform information from the driving waveform information output unit.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: February 17, 2015
    Assignee: Seiko Epson Corporation
    Inventors: Hidenori Yato, Shigeaki Kawano, Hiroshi Kiya, Keisuke Hashimoto, Hiroaki Nomizo
  • Patent number: 8704813
    Abstract: An integrated circuit device generates drive waveforms which can be adapted to a plurality of panels by a function of setting a repetition period, the function setting which of periods in a drive waveform pattern is to be repeated, and a function of setting the number of times, the function setting what number of times the set period is to be repeated.
    Type: Grant
    Filed: August 31, 2011
    Date of Patent: April 22, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Keisuke Hashimoto, Shigeaki Kawano
  • Publication number: 20130057070
    Abstract: A circuit device includes: a first storage control unit which receives power from a power receiving unit which receives power by electromagnetic induction, to perform control of storing charge in a first charge storage unit; a second storage control unit which performs control of storing charge in a second charge storage unit; and a power source supply unit which supplies power source to a system device based on charges stored in the first charge storage unit and the second charge storage unit. The second charge storage unit is a charge storage unit whose charge storage capacitance is smaller than that of the first charge storage unit. The power source supply unit supplies, at the time of system start-up after the start of power reception, power source based on the stored charge of the second charge storage unit to the system device.
    Type: Application
    Filed: August 27, 2012
    Publication date: March 7, 2013
    Applicant: Seiko Epson Corporation
    Inventors: Kota Onishi, Nobutaka Shiozaki, Masaya Ninomiya, Shigeaki Kawano
  • Publication number: 20120050242
    Abstract: An integrated circuit device generates drive waveforms which can be adapted to a plurality of panels by a function of setting a repetition period, the function setting which of periods in a drive waveform pattern is to be repeated, and a function of setting the number of times, the function setting what number of times the set period is to be repeated.
    Type: Application
    Filed: August 31, 2011
    Publication date: March 1, 2012
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Keisuke HASHIMOTO, Shigeaki KAWANO
  • Publication number: 20110069052
    Abstract: An integrated circuit device includes: a driving voltage output unit that outputs a driving voltage supplied to a segment electrode of an electro-optical panel; a display data storage unit that stores display data; and a driving waveform information output unit that outputs driving waveform information when a display state of the segment electrode is changed from a first display state corresponding to first display data to a second display state corresponding to second display data, wherein the driving voltage output unit outputs the driving voltage specified by the first display data and the second display data from the display data storage unit, and the driving waveform information from the driving waveform information output unit.
    Type: Application
    Filed: September 9, 2010
    Publication date: March 24, 2011
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Hidenori YATO, Shigeaki Kawano, Hiroshi Kiya, Keisuke Hashimoto, Hiroaki Nomizo