Patents by Inventor Kota Muto

Kota Muto 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: 20180351544
    Abstract: A circuit device includes: a transmitting circuit that performs transmission of a signal by current-driving signal lines in a transmission period; a receiving circuit that receives a signal that a transmitting circuit of a communication partner has transmitted by current-driving the signal lines, in a reception period that is different from the transmission period; and terminating resistor circuits that can be connected to the signal lines, and whose resistance value in the transmission period is set to a value that is smaller than a resistance value in the reception period.
    Type: Application
    Filed: May 2, 2018
    Publication date: December 6, 2018
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Kota MUTO, Toshimichi YAMADA
  • 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
  • Patent number: 9990891
    Abstract: A control device that controls the driving of a display device which changes display states by a writing operation of applying a driving voltage several times, wherein the control device includes a determining portion that determines whether or not the writing operation is performed for each pixel; and a control portion that starts the writing operation in the pixel in which the writing operation is determined to be performed by the determining portion, the writing operation including applying, wherein, in a case where a previous writing operation is not performed on the pixel in which the writing operation is determined to be performed by the determining portion, the control portion starts the writing operation, and in a case where the previous writing operation is performed on the pixel, the control portion starts the next writing operation after the previous writing operation is finished.
    Type: Grant
    Filed: August 20, 2011
    Date of Patent: June 5, 2018
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Yusuke Yamada, Kota Muto
  • 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: 9601063
    Abstract: A device for controlling a display apparatus includes: an image acquiring portion that acquires first image data containing a tone value of each pixel; a parameter acquiring portion that acquires a parameter for determining a tone used to display an image, from among the tones of the pixel that change in a discrete manner; and a tone reducing portion that determines, in a case of reducing the number of tones to a number of tones smaller than that of the first image data, each tone value after the reduction of the number of tones, according to the parameter acquired by the parameter acquiring portion, and generates second image data in which the number of tones in the first image data acquired by the image acquiring portion has been reduced based on the determined tone value.
    Type: Grant
    Filed: March 21, 2013
    Date of Patent: March 21, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Yusuke Yamada, Kota Muto
  • 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: 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
  • Patent number: 9240134
    Abstract: When a write operation to change the pixel into one of the first gray level and the second gray level is stopped before completion of the write operation, and when a write section executes a write operation to change the pixel into another of the first gray level and the second gray level, the write section executes the write operation by voltage application to change the pixel into the other gray level the same number of times of voltage application as the number of times of voltage application in the write operation that has been stopped.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: January 19, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Yusuke Yamada, Kota Muto
  • 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
  • Publication number: 20150123954
    Abstract: A device for controlling a display apparatus includes: an image acquiring portion that acquires first image data containing a tone value of each pixel; a parameter acquiring portion that acquires a parameter for determining a tone used to display an image, from among the tones of the pixel that change in a discrete manner; and a tone reducing portion that determines, in a case of reducing the number of tones to a number of tones smaller than that of the first image data, each tone value after the reduction of the number of tones, according to the parameter acquired by the parameter acquiring portion, and generates second image data in which the number of tones in the first image data acquired by the image acquiring portion has been reduced based on the determined tone value.
    Type: Application
    Filed: March 21, 2013
    Publication date: May 7, 2015
    Applicant: Seiko Epson Corporation
    Inventors: Yusuke Yamada, Kota Muto
  • Publication number: 20150009245
    Abstract: An electro-optical device includes a control unit that controls a display unit having a plurality of pixels. The control unit performs a differential driving operation of performing an operation of erasing a first image component which is a part of a display image in a first display state and an operation of displaying a second image component which is a part of a display image in a second display state by selectively driving the pixels having different gray scales in the first display state and the second display state when the display unit is changed from the first display state to the second display state. The operation of erasing the first image component includes an extended erasing operation of driving a first pixel group which includes the pixels constituting the first image component and the pixels being adjacent to the first image component and surrounding the first image component.
    Type: Application
    Filed: September 19, 2014
    Publication date: January 8, 2015
    Inventors: Kota MUTO, Masato NISHIZAWA
  • Patent number: 8878770
    Abstract: A control method of an electro-optical device includes: performing a first supply process for supplying an electric potential corresponding to the changed gray level to a pixel electrode of a first pixel; performing a second supply process for supplying the same electric potential as an electric potential of a counter electrode to a pixel electrode of a second pixel; extracting a contour image from a difference between an image before the image rewriting and an image after the image rewriting; determining whether or not the first supply process is being performed, in units of a pixel, for contour display pixels that display the contour image; and performing a contour elimination process for supplying an electric potential for eliminating the contour image to the pixel electrode of a pixel, for which it is determined that the first supply process is not being performed, among the contour display pixels.
    Type: Grant
    Filed: May 1, 2012
    Date of Patent: November 4, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Atsushi Miyazaki, Kota Muto
  • Patent number: 8878880
    Abstract: A method of driving an electrophoretic display device includes changing the gradation level of image data on the basis of correction data corresponding to the gradation level, converting image data with the changed gradation level to a dithering pattern, in which the first color and the second color are combined, corresponding to the changed gradation level for each predetermined region of image data, and driving the electrophoretic particles of the first color and the electrophoretic particles of the second color on the basis of image data converted to the dithering pattern for the plurality of pixels in the display section.
    Type: Grant
    Filed: April 7, 2011
    Date of Patent: November 4, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Tetsuaki Otsuki, Kota Muto
  • Patent number: 8866858
    Abstract: An electro-optical device includes a control unit that controls a display unit having a plurality of pixels. The control unit performs a differential driving operation of performing an operation of erasing a first image component which is a part of a display image in a first display state and an operation of displaying a second image component which is a part of a display image in a second display state by selectively driving the pixels having different gray scales in the first display state and the second display state when the display unit is changed from the first display state to the second display state. The operation of erasing the first image component includes an extended erasing operation of driving a first pixel group which includes the pixels constituting the first image component and the pixels being adjacent to the first image component and surrounding the first image component.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: October 21, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Kota Muto, Masato Nishizawa
  • 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
  • Patent number: 8786644
    Abstract: A control device includes output means for outputting a signal for controlling an electro-optical device having a plurality of pixels which are provided so as to correspond to intersections of a plurality of scanning lines and a plurality of data lines, to the electro-optical device, and control means for controlling the output means to output a signal for applying a voltage corresponding to data stored in a memory to the plurality of data lines, whereby an image which is written by the signal when a first condition is satisfied has a higher spatial frequency of grayscale variations in an extending direction of the data lines than that of an image which is written by the signal when a second condition is satisfied.
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: July 22, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Kota Muto, Yusuke Yamada
  • Patent number: 8587503
    Abstract: An electro-optical device includes a display unit that includes a plurality of arranged pixels and a control unit that drives the display unit. When a part or the entirety of the display unit is displayed in a single gradation, the control unit performs a first elimination operation of selectively driving a first pixel group including the pixels displayed in gradations other than a first gradation to change the pixels included in the first pixel group to the first gradation, and a second elimination operation of selectively driving a second pixel group including the pixels positioned on the outline of an area formed of the first pixel group and the plurality of pixels provided adjacent to the area formed of the first pixel group and surrounding the area to change the pixels included in the second pixel group to the first gradation.
    Type: Grant
    Filed: March 1, 2011
    Date of Patent: November 19, 2013
    Assignee: Seiko Epson Corporation
    Inventors: Kota Muto, Masato Nishizawa
  • Publication number: 20130229445
    Abstract: When a write operation to change the pixel into one of the first gray level and the second gray level is stopped before completion of the write operation, and when a write section executes a write operation to change the pixel into another of the first gray level and the second gray level, the write section executes the write operation by voltage application to change the pixel into the other gray level the same number of times of voltage application as the number of times of voltage application in the write operation that has been stopped.
    Type: Application
    Filed: February 21, 2013
    Publication date: September 5, 2013
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Yusuke Yamada, Kota Muto