Patents by Inventor Hitoshi Tsuge

Hitoshi Tsuge 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: 10923030
    Abstract: An EL display apparatus is provided. A display screen includes pixels arranged in a matrix, with each pixel including an EL device and a pixel circuit. A source driver circuit is configured to output an analog video signal to each pixel. A gate driver circuit is on at least one side of the display screen, with the gate driver circuit including first and second gate driver circuits. Each pixel includes a driving transistor, a first switch transistor, and a second switch transistor. A gate terminal of the first switch transistor is connected to a first gate signal line of the first gate driver circuit, and a gate terminal of the second switch transistor is connected to a second gate signal line of the second gate driver circuit. The first and second switch transistors are on/off controlled, independently, by the first and second gate driver circuits.
    Type: Grant
    Filed: August 31, 2020
    Date of Patent: February 16, 2021
    Assignee: JOLED INC.
    Inventors: Hiroshi Takahara, Hitoshi Tsuge
  • Patent number: 10916203
    Abstract: A display apparatus has an image display unit having a plurality of arrayed pixel circuits, and an image signal compensation circuit compensating an image signal and outputs the compensated signal to the image display unit. Each of the pixel circuits has a compensating capacitor which compensates the threshold voltage of the driving transistor. The image signal compensation circuit has a compensation memory storing a compensation data for compensating the current variation of the driving transistors, a first comparison circuit which compares the image signal and first threshold value, and an arithmetic circuit compensating the image signal. When the image signal has a luminance larger than the threshold value, the compensation is performed.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: February 9, 2021
    Assignee: JOLED INC
    Inventor: Hitoshi Tsuge
  • Publication number: 20200402462
    Abstract: An EL display apparatus is provided. A display screen includes pixels arranged in a matrix, with each pixel including an EL device and a pixel circuit. A source driver circuit is configured to output an analog video signal to each pixel. A gate driver circuit is on at least one side of the display screen, with the gate driver circuit including first and second gate driver circuits. Each pixel includes a driving transistor, a first switch transistor, and a second switch transistor. A gate terminal of the first switch transistor is connected to a first gate signal line of the first gate driver circuit, and a gate terminal of the second switch transistor is connected to a second gate signal line of the second gate driver circuit. The first and second switch transistors are on/off controlled, independently, by the first and second gate driver circuits.
    Type: Application
    Filed: August 31, 2020
    Publication date: December 24, 2020
    Applicant: JOLED INC.
    Inventors: Hiroshi TAKAHARA, Hitoshi TSUGE
  • Publication number: 20200394958
    Abstract: An EL display apparatus is provided. A display screen includes pixels arranged in a matrix, with each pixel including an EL device and a pixel circuit. A source driver circuit is configured to output an analog video signal to each pixel. A gate driver circuit is on at least one side of the display screen, with the gate driver circuit including first and second gate driver circuits. Each pixel includes a driving transistor, a first switch transistor, and a second switch transistor. A gate terminal of the first switch transistor is connected to a first gate signal line of the first gate driver circuit, and a gate terminal of the second switch transistor is connected to a second gate signal line of the second gate driver circuit. The first and second switch transistors are on/off controlled, independently, by the first and second gate driver circuits.
    Type: Application
    Filed: August 31, 2020
    Publication date: December 17, 2020
    Applicant: JOLED INC.
    Inventors: Hiroshi TAKAHARA, Hitoshi TSUGE
  • Patent number: 10818235
    Abstract: An EL display apparatus is provided. A display screen includes pixels arranged in a matrix, with each pixel including an EL device and a pixel circuit. A source driver circuit is configured to output an analog video signal to each pixel. A gate driver circuit is on at least one side of the display screen, with the gate driver circuit including first and second gate driver circuits. Each pixel includes a driving transistor, a first switch transistor, and a second switch transistor. A gate terminal of the first switch transistor is connected to a first gate signal line of the first gate driver circuit, and a gate terminal of the second switch transistor is connected to a second gate signal line of the second gate driver circuit. The first and second switch transistors are on/off controlled, independently, by the first and second gate driver circuits.
    Type: Grant
    Filed: April 29, 2020
    Date of Patent: October 27, 2020
    Assignee: JOLED INC.
    Inventors: Hiroshi Takahara, Hitoshi Tsuge
  • Publication number: 20200258451
    Abstract: An EL display apparatus is provided. A display screen includes pixels arranged in a matrix, with each pixel including an EL device and a pixel circuit. A source driver circuit is configured to output an analog video signal to each pixel. A gate driver circuit is on at least one side of the display screen, with the gate driver circuit including first and second gate driver circuits. Each pixel includes a driving transistor, a first switch transistor, and a second switch transistor. A gate terminal of the first switch transistor is connected to a first gate signal line of the first gate driver circuit, and a gate terminal of the second switch transistor is connected to a second gate signal line of the second gate driver circuit. The first and second switch transistors are on/off controlled, independently, by the first and second gate driver circuits.
    Type: Application
    Filed: April 29, 2020
    Publication date: August 13, 2020
    Applicant: JOLED INC.
    Inventors: Hiroshi TAKAHARA, Hitoshi TSUGE
  • Patent number: 10699639
    Abstract: An EL display apparatus is provided. A display screen includes pixels arranged in a matrix, with each pixel including an EL device and a pixel circuit. A source driver circuit is configured to output an analog video signal to each pixel. A gate driver circuit is on at least one side of the display screen, with the gate driver circuit including first and second gate driver circuits. Each pixel includes a driving transistor, a first switch transistor, and a second switch transistor. A gate terminal of the first switch transistor is connected to a first gate signal line of the first gate driver circuit, and a gate terminal of the second switch transistor is connected to a second gate signal line of the second gate driver circuit. The first and second switch transistors are on/off controlled, independently, by the first and second gate driver circuits.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: June 30, 2020
    Assignee: JOLED INC.
    Inventors: Hiroshi Takahara, Hitoshi Tsuge
  • Patent number: 10644092
    Abstract: A display panel includes a contact area which includes an upper conductive layer forming first electrodes of the organic EL elements, a lower conductive layer disposed below the upper conductive layer, a middle layer between the upper conductive layer and the lower conductive layer, and an insulating layer between the lower conductive layer and the middle layer. The middle layer includes a first area and a second area which are conductive and electrically connected to the upper conductive layer, and an insulating separating area which separates the first area and the second area. The lower conductive layer includes a first line which is electrically connected to the first area via a first contact hole, and a second line which is electrically connected to the second area via a second contact hole.
    Type: Grant
    Filed: August 2, 2018
    Date of Patent: May 5, 2020
    Assignee: JOLED INC.
    Inventors: Kenji Kokuda, Masafumi Matsui, Hitoshi Tsuge, Takashi Osako, Shigeo Homura, Ryoichi Yasuda
  • Publication number: 20200135103
    Abstract: An EL display apparatus is provided. A display screen includes pixels arranged in a matrix, with each pixel including an EL device and a pixel circuit. A source driver circuit is configured to output an analog video signal to each pixel. A gate driver circuit is on at least one side of the display screen, with the gate driver circuit including first and second gate driver circuits. Each pixel includes a driving transistor, a first switch transistor, and a second switch transistor. A gate terminal of the first switch transistor is connected to a first gate signal line of the first gate driver circuit, and a gate terminal of the second switch transistor is connected to a second gate signal line of the second gate driver circuit. The first and second switch transistors are on/off controlled, independently, by the first and second gate driver circuits.
    Type: Application
    Filed: December 13, 2019
    Publication date: April 30, 2020
    Applicant: JOLED INC.
    Inventors: Hiroshi TAKAHARA, Hitoshi TSUGE
  • Patent number: 10614755
    Abstract: A display device includes a plurality of pixels arranged in rows and columns, a plurality of first power lines that extend in a pixel column direction and through which a power supply voltage is supplied to the pixels, and a plurality of second power lines that extend in the pixel column direction and through which an initialization voltage different from the power supply voltage is to the pixels. The number of first power lines is greater than the number of second power lines.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: April 7, 2020
    Assignee: JOLED INC.
    Inventors: Kohei Ebisuno, Masafumi Matsui, Hitoshi Tsuge
  • Publication number: 20200043411
    Abstract: A light emitting display panel includes a plurality of pixel circuits arranged in a matrix. Each of the plurality of pixel circuits includes a light emitting element, a capacitor that is connected to a gate of a drive transistor and the light emitting element, a first switch transistor that is connected to a first electrode of the capacitor, a first wire that is connected to the first electrode of the capacitor via the first switch transistor, a second switch transistor that is connected to a second electrode of the capacitor and the light emitting element, and a second wire that is connected to the second electrode of the capacitor via the second switch transistor. A voltage of the first wire and a voltage of the second wire are the same during a power off operation or during a non-light emission period.
    Type: Application
    Filed: October 11, 2019
    Publication date: February 6, 2020
    Applicant: JOLED INC.
    Inventor: Hitoshi TSUGE
  • Patent number: 10553158
    Abstract: An electroluminescent (EL) display apparatus and corresponding method of control are provided. A display screen includes gate signal lines which are arranged to intersect source signal lines. A pixel provided with an EL device corresponds to each intersection of the gate signal lines and the source signal lines. A driving transistor is provided for each pixel to supply a current to the EL device. A first switch transistor is provided for each pixel on a current path through which the current is supplied to the EL device. A gate driver circuit is connected to the gate signal lines. The gate driver circuit is configured to turn the first switch transistor on and off to simultaneously generate band-shaped non-display regions and band-shaped display regions on the display screen and to move the band-shaped non-display regions and the band-shaped display regions relative to the display screen.
    Type: Grant
    Filed: October 5, 2018
    Date of Patent: February 4, 2020
    Assignee: JOLED INC.
    Inventors: Hiroshi Takahara, Hitoshi Tsuge
  • Patent number: 10482813
    Abstract: A power off method of a display device includes: detecting a power off operation on the display device; setting, when the power off operation is detected, a same potential in one electrode and an other electrode of a capacitance element in each of a plurality of pixel circuits; and stopping power supply to a display panel immediately after the same potential is set.
    Type: Grant
    Filed: July 23, 2014
    Date of Patent: November 19, 2019
    Assignee: JOLED INC.
    Inventor: Hitoshi Tsuge
  • Patent number: 10453395
    Abstract: An electroluminescent (EL) display apparatus and method of controlling are provided. A display screen includes gate and source signal lines. A pixel corresponds to each intersection of the gate and source signal lines. Each pixel includes: an EL device including anode and cathode terminals, the cathode terminal being connected to a common reference voltage; a driving transistor to flow a current to the EL device; a first switch transistor provided on a current path through which the current flows from a power line through the driving transistor to the EL device; a second switch transistor to supply, to the driving transistor, an image signal from one source signal line; and a third switch transistor provided between the anode terminal of the EL device and a voltage line. The voltage line is configured to supply a reverse bias voltage for reverse biasing the anode terminal of the EL device.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: October 22, 2019
    Assignee: JOLED INC.
    Inventors: Hiroshi Takahara, Hitoshi Tsuge
  • Patent number: 10395595
    Abstract: Pixel circuits each include a write transistor having a gate electrode connected to a write control line, one of a drain electrode and a source electrode connected to a data line for transmitting data voltage corresponding to luminance of the pixel circuit, and the other of the drain electrode and the source electrode connected to a gate electrode of a drive transistor. A compensation circuit includes a compensation transistor connected to a compensation signal line and the write control line. A compensation voltage generation circuit outputs compensation control voltage in accordance with a representative value of data voltage for the pixel circuits. A capacitance of the write control line caused by the compensation transistor and a capacitance of the write control line caused by the write transistors of the pixel circuits have mutually opposite voltage dependence with respect to the representative value of the data voltage for the pixel circuits.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: August 27, 2019
    Assignee: JOLED INC.
    Inventors: Masafumi Matsui, Hitoshi Tsuge, Kohei Ebisuno
  • Patent number: 10347183
    Abstract: An electroluminescent (EL) display apparatus and corresponding method of control are provided. A display screen includes gate signal lines which are arranged to intersect source signal lines. A pixel provided with an EL device corresponds to each intersection of the gate signal lines and the source signal lines. A driving transistor is provided for each pixel to supply a current to the EL device. A first switch transistor is provided for each pixel on a current path through which the current is supplied to the EL device. A gate driver circuit is connected to the gate signal lines. The gate driver circuit is configured to turn the first switch transistor on and off to simultaneously generate band-shaped non-display regions and band-shaped display regions on the display screen and to move the band-shaped non-display regions and the band-shaped display regions relative to the display screen.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: July 9, 2019
    Assignee: JOLED INC.
    Inventors: Hiroshi Takahara, Hitoshi Tsuge
  • Patent number: 10319303
    Abstract: A plurality of pixel circuits included in a display device each includes: a drive transistor; a capacitor connected to a gate electrode and a source electrode of the drive transistor; a light-emitting element which is driven by the drive transistor; a write transistor having a gate electrode connected to a write control line for transmitting a write signal, one of a drain electrode and a source electrode connected to a data line for transmitting a data voltage corresponding to luminance, and the other of the drain electrode and the source electrode connected to the gate electrode of the drive transistor; and a compensation transistor having a gate electrode connected to the data line, and at least one of a drain electrode and a source electrode connected to the write control line, the compensation transistor being of same conductivity type as the write transistor.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: June 11, 2019
    Assignee: JOLED INC.
    Inventors: Masafumi Matsui, Hitoshi Tsuge, Kohei Ebisuno
  • Publication number: 20190115413
    Abstract: A display panel includes a contact area which includes an upper conductive layer forming first electrodes of the organic EL elements, a lower conductive layer disposed below the upper conductive layer, a middle layer between the upper conductive layer and the lower conductive layer, and an insulating layer between the lower conductive layer and the middle layer. The middle layer includes a first area and a second area which are conductive and electrically connected to the upper conductive layer, and an insulating separating area which separates the first area and the second area. The lower conductive layer includes a first line which is electrically connected to the first area via a first contact hole, and a second line which is electrically connected to the second area via a second contact hole.
    Type: Application
    Filed: August 2, 2018
    Publication date: April 18, 2019
    Applicant: JOLED INC.
    Inventors: Kenji KOKUDA, Masafumi MATSUI, Hitoshi TSUGE, Takashi OSAKO, Shigeo HOMURA, Ryoichi YASUDA
  • Publication number: 20190108791
    Abstract: An electroluminescent (EL) display apparatus and corresponding method of control are provided. A display screen includes gate signal lines which are arranged to intersect source signal lines. A pixel provided with an EL device corresponds to each intersection of the gate signal lines and the source signal lines. A driving transistor is provided for each pixel to supply a current to the EL device. A first switch transistor is provided for each pixel on a current path through which the current is supplied to the EL device. A gate driver circuit is connected to the gate signal lines. The gate driver circuit is configured to turn the first switch transistor on and off to simultaneously generate band-shaped non-display regions and band-shaped display regions on the display screen and to move the band-shaped non-display regions and the band-shaped display regions relative to the display screen.
    Type: Application
    Filed: October 10, 2018
    Publication date: April 11, 2019
    Applicant: JOLED INC.
    Inventors: Hiroshi TAKAHARA, Hitoshi Tsuge
  • Publication number: 20190108789
    Abstract: A display device includes a display panel and a control circuit which controls the display panel. The display panel includes pixel circuits and one or more dummy pixel circuits. Each pixel circuit includes an organic EL element having a first electrode and a second electrode, and a drive transistor. Each dummy pixel circuit includes a dummy capacitance element having a first dummy electrode, and a second dummy electrode shared with the second electrode of the organic EL element. The control circuit performs at least one of initialization control to initialize a potential of the first electrode in a different pixel circuit and dummy initialization control to initialize a potential of the first dummy electrode in the dummy pixel circuit within a period for which threshold compensation control to compensate for a threshold voltage of the drive transistor is performed on each of the pixel circuits.
    Type: Application
    Filed: July 26, 2018
    Publication date: April 11, 2019
    Applicant: JOLED INC.
    Inventor: Hitoshi TSUGE