Patents by Inventor Mitsutoshi Miyasaka

Mitsutoshi Miyasaka 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: 20230395026
    Abstract: A circuit device includes a scan line drive circuit that drives a plurality of scan lines of an electro-optical element. A field for constituting one image includes a plurality of subfields. The scan line drive circuit selects once a scan line group to be selected among the plurality of scan lines, in a subfield included in the plurality of subfields. The scan line group includes a scan line connected to a pixel circuit to which an i-th bit is written in a subfield, and a scan line connected to a pixel circuit to which a j-th bit is written in a subfield.
    Type: Application
    Filed: June 1, 2023
    Publication date: December 7, 2023
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Yoichi MOMOSE, Mitsutoshi MIYASAKA
  • Publication number: 20230252938
    Abstract: The electro-optical device includes a plurality of digital scanning lines, a plurality of analog scanning lines, a digital signal line, an analog signal line, and a plurality of pixel circuits. Each of the pixel circuits includes a light emitting element, a digital driving circuit, and an analog driving circuit. The digital driving circuit performs digital driving in which a drive current is supplied to the light emitting element in a period of a length corresponding to a grayscale value. The analog driving circuit performs analog current setting in which a current value of the drive current is set based on an analog data voltage. In a period in which the pixel circuit connected to an s-th digital scanning line and an s-th analog scanning line performs the analog current setting, the pixel circuit connected to a t-th digital scanning line and a t-th analog scanning line performs the digital driving.
    Type: Application
    Filed: April 14, 2023
    Publication date: August 10, 2023
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Yoichi MOMOSE, Mitsutoshi MIYASAKA
  • Patent number: 11699393
    Abstract: A circuit device includes a scan line drive circuit that drives a plurality of scan lines of an electro-optical element. A field for constituting one image includes a plurality of subfields. The scan line drive circuit selects once a scan line group to be selected among the plurality of scan lines, in a subfield included in the plurality of subfields. The scan line group includes a scan line connected to a pixel circuit to which an i-th bit is written in a subfield, and a scan line connected to a pixel circuit to which a j-th bit is written in a subfield.
    Type: Grant
    Filed: July 21, 2022
    Date of Patent: July 11, 2023
    Inventors: Yoichi Momose, Mitsutoshi Miyasaka
  • Patent number: 11657754
    Abstract: The electro-optical device includes a plurality of digital scanning lines, a plurality of analog scanning lines, a digital signal line, an analog signal line, and a plurality of pixel circuits. Each of the pixel circuits includes a light emitting element, a digital driving circuit, and an analog driving circuit. The digital driving circuit performs digital driving in which a drive current is supplied to the light emitting element in a period of a length corresponding to a grayscale value. The analog driving circuit performs analog current setting in which a current value of the drive current is set based on an analog data voltage. In a period in which the pixel circuit connected to an s-th digital scanning line and an s-th analog scanning line performs the analog current setting, the pixel circuit connected to a t-th digital scanning line and a t-th analog scanning line performs the digital driving.
    Type: Grant
    Filed: December 20, 2021
    Date of Patent: May 23, 2023
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Yoichi Momose, Mitsutoshi Miyasaka
  • Publication number: 20230119587
    Abstract: An electro-optical device includes a plurality of digital scanning lines, a digital signal line, and a plurality of pixel circuits. Each of the pixel circuits includes a light emitting element and a digital driving circuit. The digital driving circuit performs digital driving to turn the light emitting element ON-state or OFF-state based on a grayscale value. The digital driving circuit keeps the light emitting element ON-state by supplying a drive current to the light emitting element, in a period in which an enable signal is active, of a grayscale display period having a length corresponding to the grayscale value. The control line driving circuit sets a period in which the enable signal is active. A ratio, with respect to the grayscale display period, of an ON-state period in which the light emitting element is ON-state changes in accordance with the period in which the enable signal is active.
    Type: Application
    Filed: December 16, 2022
    Publication date: April 20, 2023
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Yoichi MOMOSE, Mitsutoshi MIYASAKA
  • Patent number: 11562695
    Abstract: An electro-optical device includes a plurality of digital scanning lines, a digital signal line, and a plurality of pixel circuits. Each of the pixel circuits includes a light emitting element and a digital driving circuit. The digital driving circuit performs digital driving to turn the light emitting element ON-state or OFF-state based on a grayscale value. The digital driving circuit keeps the light emitting element ON-state by supplying a drive current to the light emitting element, in a period in which an enable signal is active, of a grayscale display period having a length corresponding to the grayscale value. The control line driving circuit sets a period in which the enable signal is active. A ratio, with respect to the grayscale display period, of an ON-state period in which the light emitting element is ON-state changes in accordance with the period in which the enable signal is active.
    Type: Grant
    Filed: December 22, 2021
    Date of Patent: January 24, 2023
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Yoichi Momose, Mitsutoshi Miyasaka
  • Publication number: 20220358882
    Abstract: A circuit device includes a scan line drive circuit that drives a plurality of scan lines of an electro-optical element. A field for constituting one image includes a plurality of subfields. The scan line drive circuit selects once a scan line group to be selected among the plurality of scan lines, in a subfield included in the plurality of subfields. The scan line group includes a scan line connected to a pixel circuit to which an i-th bit is written in a subfield, and a scan line connected to a pixel circuit to which a j-th bit is written in a subfield.
    Type: Application
    Filed: July 21, 2022
    Publication date: November 10, 2022
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Yoichi MOMOSE, Mitsutoshi MIYASAKA
  • Patent number: 11468827
    Abstract: A circuit device includes a scan line drive circuit that drives a plurality of scan lines of an electro-optical element, and an enable line drive circuit that outputs an enable signal to a plurality of pixel circuits. A field for constituting one image includes a plurality of subfields. The enable line drive circuit outputs an enable signal that is active in a partial period of a first display period corresponding to a first bit, which is a lower bit of display data. When the enable signal is active in a partial period of the first display period, a pixel is ON-state or OFF-state.
    Type: Grant
    Filed: June 28, 2021
    Date of Patent: October 11, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Yoichi Momose, Mitsutoshi Miyasaka
  • Publication number: 20220284540
    Abstract: An electro-optical device includes a pixel circuit 41G, a pixel circuit 41B, a high potential line 47G configured to supply a high potential VDDG to the pixel circuit 41G, a high potential line 47B configured to supply a high potential VDDB to the pixel circuit 41B, and a low potential line 46 configured to supply a first low potential VSS1 to the pixel circuit 41G and the pixel circuit 41B. The pixel circuit 41G includes a light-emitting element 20G configured to display G, the pixel circuit 41B includes a light-emitting element 20B configured to display B, and the high potential VDDG and the high potential VDDB are mutually independent.
    Type: Application
    Filed: May 24, 2022
    Publication date: September 8, 2022
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Mitsutoshi MIYASAKA, Yoichi MOMOSE, Kiyoshi SEKIJIMA
  • Patent number: 11417275
    Abstract: A circuit device includes a scan line drive circuit that drives a plurality of scan lines of an electro-optical element. A field for constituting one image includes a plurality of subfields. The scan line drive circuit selects once a scan line group to be selected among the plurality of scan lines, in a subfield included in the plurality of subfields. The scan line group includes a scan line connected to a pixel circuit to which an i-th bit is written in a subfield, and a scan line connected to a pixel circuit to which a j-th bit is written in a subfield.
    Type: Grant
    Filed: June 28, 2021
    Date of Patent: August 16, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Yoichi Momose, Mitsutoshi Miyasaka
  • Publication number: 20220199021
    Abstract: An electro-optical device includes a plurality of digital scanning lines, a digital signal line, and a plurality of pixel circuits. Each of the pixel circuits includes a light emitting element and a digital driving circuit. The digital driving circuit performs digital driving to turn the light emitting element ON-state or OFF-state based on a grayscale value. The digital driving circuit keeps the light emitting element ON-state by supplying a drive current to the light emitting element, in a period in which an enable signal is active, of a grayscale display period having a length corresponding to the grayscale value. The control line driving circuit sets a period in which the enable signal is active. A ratio, with respect to the grayscale display period, of an ON-state period in which the light emitting element is ON-state changes in accordance with the period in which the enable signal is active.
    Type: Application
    Filed: December 22, 2021
    Publication date: June 23, 2022
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Yoichi MOMOSE, Mitsutoshi MIYASAKA
  • Publication number: 20220199003
    Abstract: The electro-optical device includes a plurality of digital scanning lines, a plurality of analog scanning lines, a digital signal line, an analog signal line, and a plurality of pixel circuits. Each of the pixel circuits includes a light emitting element, a digital driving circuit, and an analog driving circuit. The digital driving circuit performs digital driving in which a drive current is supplied to the light emitting element in a period of a length corresponding to a grayscale value. The analog driving circuit performs analog current setting in which a current value of the drive current is set based on an analog data voltage. In a period in which the pixel circuit connected to an s-th digital scanning line and an s-th analog scanning line performs the analog current setting, the pixel circuit connected to a t-th digital scanning line and a t-th analog scanning line performs the digital driving.
    Type: Application
    Filed: December 20, 2021
    Publication date: June 23, 2022
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Yoichi MOMOSE, Mitsutoshi MIYASAKA
  • Patent number: 11367162
    Abstract: An electro-optical device includes a pixel circuit 41G, a pixel circuit 41B, a high potential line 47G configured to supply a high potential VDDG to the pixel circuit 41G, a high potential line 47B configured to supply a high potential VDDB to the pixel circuit 41B, and a low potential line 46 configured to supply a first low potential VSS1 to the pixel circuit 41G and the pixel circuit 41B. The pixel circuit 41G includes a light-emitting element 20G configured to display G, the pixel circuit 41B includes a light-emitting element 20B configured to display B, and the high potential VDDG and the high potential VDDB are mutually independent.
    Type: Grant
    Filed: January 28, 2021
    Date of Patent: June 21, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Mitsutoshi Miyasaka, Yoichi Momose, Kiyoshi Sekijima
  • Publication number: 20210407413
    Abstract: A circuit device includes a scan line drive circuit that drives a plurality of scan lines of an electro-optical element. A field for constituting one image includes a plurality of subfields. The scan line drive circuit selects once a scan line group to be selected among the plurality of scan lines, in a subfield included in the plurality of subfields. The scan line group includes a scan line connected to a pixel circuit to which an i-th bit is written in a subfield, and a scan line connected to a pixel circuit to which a j-th bit is written in a subfield.
    Type: Application
    Filed: June 28, 2021
    Publication date: December 30, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Yoichi MOMOSE, Mitsutoshi MIYASAKA
  • Publication number: 20210407382
    Abstract: A circuit device includes a scan line drive circuit that drives a plurality of scan lines of an electro-optical element, and an enable line drive circuit that outputs an enable signal to a plurality of pixel circuits. A field for constituting one image includes a plurality of subfields. The enable line drive circuit outputs an enable signal that is active in a partial period of a first display period corresponding to a first bit, which is a lower bit of display data. When the enable signal is active in a partial period of the first display period, a pixel is ON-state or OFF-state.
    Type: Application
    Filed: June 28, 2021
    Publication date: December 30, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Yoichi MOMOSE, Mitsutoshi MIYASAKA
  • Patent number: 11211009
    Abstract: An electro-optical device includes a scan line, a data line, a pixel circuit provided at an intersection of the scan line and the data line, a first high potential line, a first low potential line, a second high potential line, and a second low potential line. The pixel circuit includes a light emitting device, a memory circuit disposed between the first high potential line and the first low potential line, a first transistor of N-type including a gate electrically connected to the memory circuit, and a second transistor disposed between the memory circuit and the data line. The light emitting device and the first transistor are disposed in series between the second high potential line and the second low potential line.
    Type: Grant
    Filed: July 13, 2020
    Date of Patent: December 28, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Mitsutoshi Miyasaka, Yoichi Momose
  • Patent number: 11151942
    Abstract: An electro-optical device includes scan line, data line, pixel circuit located at a position corresponding to an intersection of the scan line and the data line, a first high potential line supplies a first potential, a low potential line supplies a second potential, and a second high potential line supplies a third potential. The pixel circuit includes a light emitting element, a memory circuit disposed between the first high potential line and the low potential line, a first transistor including a gate electrically connected to the memory circuit, and a second transistor including a gate electrically connected to the scan line. The second transistor is disposed between the memory circuit and f the data line. A potential difference between the first potential and the second potential is smaller than a potential difference between the third potential and the second potential.
    Type: Grant
    Filed: July 7, 2020
    Date of Patent: October 19, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Mitsutoshi Miyasaka, Yoichi Momose
  • Publication number: 20210150664
    Abstract: An electro-optical device includes a pixel circuit 41G, a pixel circuit 41B, a high potential line 47G configured to supply a high potential VDDG to the pixel circuit 41G, a high potential line 47B configured to supply a high potential VDDB to the pixel circuit 41B, and a low potential line 46 configured to supply a first low potential VSS1 to the pixel circuit 41G and the pixel circuit 41B. The pixel circuit 41G includes a light-emitting element 20G configured to display G, the pixel circuit 41B includes a light-emitting element 20B configured to display B, and the high potential VDDG and the high potential VDDB are mutually independent.
    Type: Application
    Filed: January 28, 2021
    Publication date: May 20, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Mitsutoshi MIYASAKA, Yoichi MOMOSE, Kiyoshi SEKIJIMA
  • Patent number: 10991319
    Abstract: Provided are a scan line, a data line, a pixel circuit provided corresponding to an intersection between the scan line and the data line, and an enable line. The pixel circuit includes a memory circuit, a light-emitting element, and an enable line driving circuit, the light-emitting element changes luminance in accordance with an image signal retained in the memory circuit, the enable line driving circuit controls a light emission enabled state of the light-emitting element, the pixel circuit includes a first pixel circuit, a second pixel circuit, a third pixel circuit, and a fourth pixel circuit, the enable line includes a first enable line and a second enable line, the first pixel circuit and the second pixel circuit are electrically connected with the first enable line, and the third pixel circuit and the fourth pixel circuit are electrically connected with the second enable line.
    Type: Grant
    Filed: October 8, 2019
    Date of Patent: April 27, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Mitsutoshi Miyasaka, Yoichi Momose, Kiyoshi Sekijima
  • Patent number: 10943326
    Abstract: An electro-optical device includes a pixel circuit 41G, a pixel circuit 41B, a high potential line 47G configured to supply a high potential VDDG to the pixel circuit 41G, a high potential line 47B configured to supply a high potential VDDB to the pixel circuit 41B, and a low potential line 46 configured to supply a first low potential VSS1 to the pixel circuit 41G and the pixel circuit 41B. The pixel circuit 41G includes a light-emitting element 20G configured to display G, the pixel circuit 41B includes a light-emitting element 20B configured to display B, and the high potential VDDG and the high potential VDDB are mutually independent.
    Type: Grant
    Filed: February 19, 2019
    Date of Patent: March 9, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Mitsutoshi Miyasaka, Yoichi Momose, Kiyoshi Sekijima