Patents by Inventor Hiroaki Kanamori

Hiroaki Kanamori 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: 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: 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
  • Patent number: 8842139
    Abstract: A driving method for driving an electrophoretic display apparatus includes writing first image data into a display unit provided with a plurality of pixels; creating second image data including image data which corresponds to first contour pixels, and which is extracted from the first image data, each of the first contour pixels being a first pixel located adjacent to a second pixel having a gray-scale level different from a gray-scale level of the first pixel, the first pixel and the second pixel being included in the plurality of pixels; and writing the second image data into the display unit.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: September 23, 2014
    Assignee: Seiko Epson Corporation
    Inventor: Hiroaki Kanamori
  • 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: 8334836
    Abstract: A driving method for driving an electrophoretic display apparatus, which has a display section including a plurality of pixels each having a pixel electrode and a common electrode opposing each other and an electrophoretic element interposed therebetween which includes electrophoretic particles, includes erasing a first image displayed on the display section, during a process of rewriting the first image into a second image. The driving method includes displaying the second image on the display section, during the process of rewriting the first image into the second image, wherein the corrected image data is image data obtained by correcting image data associated with the second image so as to reduce an area displaying the one gradation and expand an area displaying the other gradation in the second image.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: December 18, 2012
    Assignee: Seiko Epson Corporation
    Inventors: Hiroaki Kanamori, Munenori Sawada
  • 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
  • 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: 20120098873
    Abstract: A driving method for driving an electrophoretic display apparatus includes writing first image data into a display unit provided with a plurality of pixels; creating second image data including image data which corresponds to first contour pixels, and which is extracted from the first image data, each of the first contour pixels being a first pixel located adjacent to a second pixel having a gray-scale level different from a gray-scale level of the first pixel, the first pixel and the second pixel being included in the plurality of pixels; and writing the second image data into the display unit.
    Type: Application
    Filed: September 21, 2011
    Publication date: April 26, 2012
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Hiroaki KANAMORI
  • Publication number: 20090237351
    Abstract: A driving method for driving an electrophoretic display apparatus, which has a display section including a plurality of pixels each having a pixel electrode and a common electrode opposing each other and an electrophoretic element interposed therebetween which includes electrophoretic particles, includes erasing a first image displayed on the display section, during a process of rewriting the first image into a second image, by supplying the common electrode with a common voltage, supplying the pixel electrode of a pixel among the plurality of pixels which is displaying one gradation out of a first gradation and a second gradation different from the first gradation with a voltage corresponding to the other gradation different from the one gradation, supplying the pixel electrode of a pixel among the plurality of pixels which is displaying the other gradation with a voltage of the same level as the common voltage.
    Type: Application
    Filed: February 20, 2009
    Publication date: September 24, 2009
    Applicant: Seiko Epson Corporation
    Inventors: Hiroaki Kanamori, Munenori Sawada