Patents by Inventor Toshimichi Yamada

Toshimichi Yamada 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: 20180212796
    Abstract: A circuit device includes: a first physical layer circuit to which a first bus compliant with a USB standard is connected; a second physical layer circuit to which a second bus compliant with the USB standard is connected; a processing circuit that performs transfer processing in which a packet received from the first bus via the first physical layer circuit is transferred to the second bus via the second physical layer circuit, and a packet received from the second bus via the second physical layer circuit is transferred to the first bus via the first physical layer circuit; a bus monitor circuit that performs a monitor operation with respect to the first and second buses; and a bus switch circuit that switches on or off a connection between the first bus and the second bus based on a monitor result from the bus monitor circuit.
    Type: Application
    Filed: January 22, 2018
    Publication date: July 26, 2018
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Yoshiyuki KAMIHARA, Ryuichi KAGAYA, Toshimichi YAMADA
  • Patent number: 9947256
    Abstract: An integrated circuit device includes: a timing information storage section that stores phase length information in correspondence with an index number; a waveform information storage section that stores waveform information related to a plurality of drive waveforms used in response to at least one display state; a timing control section that reads an index number included for each phase in the waveform information, reads phase length information corresponding to the index number from the timing information storage section, and sequentially generates a selection signal during a drive voltage application period corresponding to a plurality of phases; and a drive waveform selection section that selects a waveform value representing a drive voltage, out of a plurality of units of waveform information stored in the waveform information storage section, in accordance with the selection signal.
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: April 17, 2018
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Kota Muto, Toshimichi Yamada
  • Patent number: 9280939
    Abstract: A method of controlling an electro-optical device includes, during image rewriting, executing a first control operation to supply a potential different from a potential on a counter electrode to a pixel electrode of a first pixel in a plurality of frame periods, executing a second control operation to supply the same potential as the potential on the counter electrode to a pixel electrode of a second pixel, which is adjacent to the first pixel and in which a gradation to be displayed during image rewriting is not changed, in at least some frame periods of a plurality of frame periods, and executing a third control operation to supply a potential different from the potential on the counter electrode to the pixel electrode of the second pixel in a frame period after the potential has been supplied in at least one frame period during the first control operation.
    Type: Grant
    Filed: April 10, 2012
    Date of Patent: March 8, 2016
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Kota Muto, Yusuke Yamada, Toshimichi Yamada, Hiroaki Kanamori
  • Publication number: 20150371602
    Abstract: An integrated circuit device includes: a timing information storage section that stores phase length information in correspondence with an index number; a waveform information storage section that stores waveform information related to a plurality of drive waveforms used in response to at least one display state; a timing control section that reads an index number included for each phase in the waveform information, reads phase length information corresponding to the index number from the timing information storage section, and sequentially generates a selection signal during a drive voltage application period corresponding to a plurality of phases; and a drive waveform selection section that selects a waveform value representing a drive voltage, out of a plurality of units of waveform information stored in the waveform information storage section, in accordance with the selection signal.
    Type: Application
    Filed: June 12, 2015
    Publication date: December 24, 2015
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Kota MUTO, Toshimichi YAMADA
  • Patent number: 9024981
    Abstract: An application control changes a first image displayed with a plurality of pixels composing the entirety or a part of a display section to an image in the first gray level displayed with the plurality of pixels, and thereafter display a second image displayed with the plurality of pixels. Also, the application control device controls an application device such that the numbers of application of the first voltage and the second voltage to each of the plurality of pixels are equal to each other from a state in which each of the plurality of pixels lastly assumes the first gray level before the first image is displayed until a state in which each of the plurality of pixels first assumes the first gray level after the first image is displayed.
    Type: Grant
    Filed: March 29, 2013
    Date of Patent: May 5, 2015
    Assignee: Seiko Epson Corporation
    Inventor: Toshimichi Yamada
  • Patent number: 8890907
    Abstract: A method of controlling an electro-optical device includes controlling a driving section such that, when an image is rewritten from a first image displayed in a first gradation to a second image including a background image portion to be displayed in the first gradation and a main image portion to be displayed in a second gradation, the same potential as a counter electrode is supplied to a pixel in the background image portion, and a potential corresponding to the second gradation is supplied to a pixel in the main image portion. The driving section is controlled such that at least one of the magnitude and application time of a voltage applied between the pixel electrode and the counter electrode is smaller in a pixel corresponding to an edge portion in the main image portion than in a pixel corresponding to a non-edge portion in the main image portion.
    Type: Grant
    Filed: April 4, 2012
    Date of Patent: November 18, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Hiroaki Kanamori, Toshimichi Yamada
  • Publication number: 20140285479
    Abstract: In a refresh period, a voltage for alternatingly inverting a memory display element between a first gray level and a second gray level is applied. The number of inversions in the refresh period when the temperature of the memory display element is low is lower than the number of inversions in the refresh period when the temperature of the memory display element is high.
    Type: Application
    Filed: February 27, 2014
    Publication date: September 25, 2014
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Toshimichi YAMADA, Kota MUTO, Hiroaki KANAMORI, Atsushi MIYAZAKI
  • Publication number: 20140253604
    Abstract: An adjustment phase, a clearing phase, and a gray level control phase are used when changing the gray levels of pixels. A plurality of pixels are aligned to a predetermined gray level in the adjustment phase. In the adjustment phase, the gray level of a pixel is changed earlier the greater a gray level difference between the gray level of the pixel and the predetermined gray level is.
    Type: Application
    Filed: March 4, 2014
    Publication date: September 11, 2014
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Hiroaki KANAMORI, Atsushi MIYAZAKI, Toshimichi YAMADA, Kota MUTO
  • Publication number: 20140247290
    Abstract: In order to achieve a desired gray level in an optical state of a bi-stable display element, voltage application is carried out so that the gray level follows a predetermined gray level change loop through a erasing period, a reset period, and a write period.
    Type: Application
    Filed: February 28, 2014
    Publication date: September 4, 2014
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Atsushi MIYAZAKI, Toshimichi YAMADA, Kota MUTO, Hiroaki KANAMORI
  • Publication number: 20130265339
    Abstract: An application control changes a first image displayed with a plurality of pixels composing the entirety or a part of a display section to an image in the first gray level displayed with the plurality of pixels, and thereafter display a second image displayed with the plurality of pixels. Also, the application control device controls an application device such that the numbers of application of the first voltage and the second voltage to each of the plurality of pixels are equal to each other from a state in which each of the plurality of pixels lastly assumes the first gray level before the first image is displayed until a state in which each of the plurality of pixels first assumes the first gray level after the first image is displayed.
    Type: Application
    Filed: March 29, 2013
    Publication date: October 10, 2013
    Applicant: Seiko Epson Corporation
    Inventor: Toshimichi Yamada
  • Patent number: 8411028
    Abstract: An electrophoretic display device driving circuit that drives an electrophoretic display device. The electrophoretic display device includes a display unit that includes a plurality of pixels, each of which includes an electrophoretic element, containing electrophoretic particles, that is provided between a pixel electrode and a common electrode that face each other; a pixel switching element; a memory circuit to which an image signal may be written through the pixel switching element; and a switch circuit that controls switching of the pixel electrode in accordance with an output based on the image signal in the memory circuit.
    Type: Grant
    Filed: January 29, 2009
    Date of Patent: April 2, 2013
    Assignee: Seiko Epson Corporation
    Inventor: Toshimichi Yamada
  • Patent number: 8345024
    Abstract: A display system includes a display device with a display section. A display-data providing device provides a display control signal containing display data to the display device. The display-data providing device stores display data to be provided to the display device and information corresponding to the display data in association with each other. The display device holds the corresponding information associated with the display data provided from the display-data providing device. If the display data is lost from the display device, and if the display-data providing device identifies the display content indicated by the corresponding information contained in the display-data identifying signal output by the display device, the display device erases the display content according to a second inverted erase signal sent from the display-data providing device, and the second inverted erase signal includes the display data corresponding to the display content identified by the display-data providing device.
    Type: Grant
    Filed: March 15, 2008
    Date of Patent: January 1, 2013
    Assignee: Seiko Epson Corporation
    Inventor: Toshimichi Yamada
  • Publication number: 20120262505
    Abstract: A method of controlling an electro-optical device includes, during image rewriting, executing a first control operation to supply a potential different from a potential on a counter electrode to a pixel electrode of a first pixel in a plurality of frame periods, executing a second control operation to supply the same potential as the potential on the counter electrode to a pixel electrode of a second pixel, which is adjacent to the first pixel and in which a gradation to be displayed during image rewriting is not changed, in at least some frame periods of a plurality of frame periods, and executing a third control operation to supply a potential different from the potential on the counter electrode to the pixel electrode of the second pixel in a frame period after the potential has been supplied in at least one frame period during the first control operation.
    Type: Application
    Filed: April 10, 2012
    Publication date: October 18, 2012
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Kota MUTO, Yusuke YAMADA, Toshimichi YAMADA, Hiroaki KANAMORI
  • Publication number: 20120262498
    Abstract: A method of controlling an electro-optical device includes controlling a driving section such that, when an image is rewritten from a first image displayed in a first gradation to a second image including a background image portion to be displayed in the first gradation and a main image portion to be displayed in a second gradation, the same potential as a counter electrode is supplied to a pixel in the background image portion, and a potential corresponding to the second gradation is supplied to a pixel in the main image portion. The driving section is controlled such that at least one of the magnitude and application time of a voltage applied between the pixel electrode and the counter electrode is smaller in a pixel corresponding to an edge portion in the main image portion than in a pixel corresponding to a non-edge portion in the main image portion.
    Type: Application
    Filed: April 4, 2012
    Publication date: October 18, 2012
    Applicant: Seiko Epson Corporation
    Inventors: Hiroaki Kanamori, Toshimichi Yamada
  • Patent number: 7786869
    Abstract: There is provided a radio communication system including a first transceiver equipped with an antenna circuit and a transmitting-receiving unit and for transmitting a data signal by an electromagnetic wave, and a second transceiver equipped with an antenna circuit, a transmitting-receiving unit, a memory unit for storing the data signal, a display unit having display memory property, and a power source unit for obtaining an operation voltage for each unit from the electromagnetic wave. The first transceiver relatively varies the transmission output of the data signal to a high level or a low level, and the second transceiver receives the data signal and stores the data signal in the memory unit when the level of the transmission output of the data signal is low, and sends the data signal from the memory unit to the display unit when the level of the transmission output of the data signal is high.
    Type: Grant
    Filed: March 15, 2008
    Date of Patent: August 31, 2010
    Assignee: Seiko Epson Corporation
    Inventor: Toshimichi Yamada
  • Publication number: 20100085343
    Abstract: An electrophoretic display includes a first electrode, a second electrode that is provided opposite to the first electrode, an electrophoretic element being sandwiched between the first electrode and the second electrode, a pixel switching element connected to a scanning line and a data line, a memory circuit connected to the pixel switching element a switching circuit disposed between the memory circuit and the first electrodes, a first power line and a second power line connected to the memory circuit, and a first control line and a second control line connected to the switching circuit. In the electrophoretic display, at least one of the first control line and the second control line is disposed in parallel with the scanning line or the data line when viewed in plan.
    Type: Application
    Filed: September 9, 2009
    Publication date: April 8, 2010
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Toshimichi YAMADA
  • Publication number: 20090243996
    Abstract: A method of driving an electrophoretic display device that includes a display unit that includes a plurality of pixels is provided. Each of the pixels includes a pair of a pixel electrode and a common electrode; an electrophoretic element that is driven on the basis of a potential difference between the pixel electrode and the common electrode; a pixel switching element; a memory circuit; and a switch circuit. The method includes: writing an image signal to the memory circuit through the pixel switching element; and displaying a predetermined image on the display unit by performing a switching control by the switch circuit in accordance with an output based on the image signal of the memory circuit to supply a predetermined potential to the pixel electrode.
    Type: Application
    Filed: February 20, 2009
    Publication date: October 1, 2009
    Applicant: Seiko Epson Corporation
    Inventor: Toshimichi Yamada
  • Publication number: 20090237350
    Abstract: An electrophoretic display device driving circuit that drives an electrophoretic display device. The electrophoretic display device includes a display unit that includes a plurality of pixels, each of which includes an electrophoretic element, containing electrophoretic particles, that is provided between a pixel electrode and a common electrode that face each other; a pixel switching element; a memory circuit to which an image signal may be written through the pixel switching element; and a switch circuit that controls switching of the pixel electrode in accordance with an output based on the image signal in the memory circuit.
    Type: Application
    Filed: January 29, 2009
    Publication date: September 24, 2009
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Toshimichi YAMADA
  • Publication number: 20090231268
    Abstract: An electrophoretic display device includes a display unit that is formed so that electrophoretic elements containing electrophoretic particles are held between a pair of substrates. The display unit is formed of a plurality of pixels. Each of the pixels includes a pixel electrode, a pixel switching element, and a latch circuit connected between the pixel electrode and the pixel switching element. A plurality of the pixels located in at least portion of the display unit each are any one of a first pixel and a second pixel. The first pixel satisfies a relationship that the gate capacitance charging time of a P-MOS transistor of a transfer inverter of the latch circuit is shorter than the gate capacitance charging time of a P-MOS transistor of a feedback inverter of the latch circuit, a relationship that the gate capacitance charging time of an N-MOS transistor of the transfer inverter is longer than the gate capacitance charging time of an N-MOS transistor of the feedback inverter, or both the relationships.
    Type: Application
    Filed: February 20, 2009
    Publication date: September 17, 2009
    Applicant: Seiko Epson Corporation
    Inventor: Toshimichi Yamada
  • Publication number: 20080238899
    Abstract: A display system includes: a display device including a display section having a dispersed system containing electrophoretic particles between a first electrode and a second electrode, wherein an electric field is generated between the first electrode and the second electrode according to display data, and the electrophoretic particles are migrated by the electric field so that an image corresponding to the display data is displayed; and a display-data providing device that provides a display control signal containing the display data to the display device; wherein the display system erases the display content of the display section by generating an electric field between the first electrode and the second electrode according to display data corresponding to the display content. The display-data providing device stores display data to be provided to the display device and information corresponding to the display data in association with each other.
    Type: Application
    Filed: March 15, 2008
    Publication date: October 2, 2008
    Applicant: Seiko Epson Corporation
    Inventor: Toshimichi Yamada