Patents by Inventor Masayuki Kumeta

Masayuki Kumeta 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: 20210157202
    Abstract: A vehicle mirror includes: an image display section that displays an image with first polarized light; and a mirror section disposed on an image output side of the image display section, wherein, in order from the image display section side, the mirror section includes, for example, a first polarizer that transmits the first polarized light and reflects second polarized light, a polarization controller that controls a polarization state of light, and a second polarizer that transmits the first polarized light and absorbs the second polarized light, wherein the polarization controller includes a liquid crystal layer, a first electrode being set on a first polarizer side of the liquid crystal layer, and a second electrode being set on a second polarizer side of the liquid crystal layer, and wherein at least one of the first electrode and the second electrode is formed with multiple area electrodes.
    Type: Application
    Filed: April 18, 2019
    Publication date: May 27, 2021
    Applicant: Ichikoh Industries, Ltd.
    Inventor: Masayuki KUMETA
  • Patent number: 10068527
    Abstract: A pixel includes five transistors and a capacitor. A first transistor controls current to be supplied to a light-emitting element. A second transistor is connected between a gate electrode of the first transistor and a first power supply. A third transistor is connected between the gate electrode of the first transistor and a second terminal of the first transistor. The capacitor is coupled between the third transistor and the second terminal of the first transistor. The fourth transistor is connected between the second terminal of the first transistor and a second power supply. The fifth transistor is connected between the second terminal of the third transistor and a signal line. The capacitor may be the only capacitor in the pixel, and the signal line may receive an initialization voltage and a gray scale data voltage.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: September 4, 2018
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Masayuki Kumeta, Takeshi Okuno, Eiji Kanda, Ryo Ishii, Naoaki Komiya
  • Patent number: 9824627
    Abstract: A display circuit includes a plurality of pixel circuits and a shared compensation transistor. Each pixel circuit includes a driving transistor to control light emission of a light emitter. The compensation transistor is to compensate the threshold voltages of the driving transistors of the pixel circuits.
    Type: Grant
    Filed: June 8, 2015
    Date of Patent: November 21, 2017
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Eiji Kanda, Masayuki Kumeta, Ryo Ishii
  • Patent number: 9805649
    Abstract: A display device includes a plurality of pixels, a gate control line electrically connected to the pixels, an auxiliary power line isolated from the gate control line, and a number of auxiliary switches between the gate control line and the auxiliary power line. The at least one auxiliary switch is controlled by an auxiliary control line isolated from the auxiliary power line and the gate control line. The at least one auxiliary switch electrically connects the gate control line and the auxiliary power line.
    Type: Grant
    Filed: August 4, 2014
    Date of Patent: October 31, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Daisuke Kawae, Ryo Ishii, Masayuki Kumeta
  • Patent number: 9747841
    Abstract: An electro-optical device selects a detection target pixel independently and obtains correction data to perform a correction operation. Under a control of the electro-optical device, remaining pixels other than the detection target pixel emit light to display an image.
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: August 29, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Masayuki Kumeta, Takeshi Okuno, Eiji Kanda
  • Patent number: 9633592
    Abstract: A display device includes an acquiring circuit, a calculator, and a delay controller. The acquiring circuit acquires a gray scale voltage of a gray scale value of a pixel. The calculator calculates a first delay correction value based on a voltage currently retained on a data signal line to which the gray scale voltage is output and a gray scale voltage to be subsequently output to the data signal line. The delay controller determines a timing when the gray scale voltage is to be output to the data signal line based on the first delay correction value.
    Type: Grant
    Filed: October 1, 2014
    Date of Patent: April 25, 2017
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Masayuki Kumeta, Ryo Ishii, Takeshi Okuno, Eiji Kanda, Daisuke Kawae, Naoaki Komiya
  • Patent number: 9633625
    Abstract: A pixel circuit includes a plurality of pixels. Each pixel includes a data storage capacitor to store a voltage for controlling a gray scale value based on an input data signal, a plurality of switch transistors connected in series between a data signal line and the data storage capacitor, and a plurality of connection transistors coupled to the pixels. The switch transistors have a gate electrode connected to a first gate control signal line. At least one connection transistor is connected between at least one node between the switch transistors of a first pixel and at least one node between the switch transistors of a second pixel adjacent to the first pixel. The at least one connection transistor includes a gate electrode connected to a second gate control signal line.
    Type: Grant
    Filed: May 21, 2014
    Date of Patent: April 25, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Masayuki Kumeta, Takeshi Okuno, Eiji Kanda, Ryo Ishii, Naoaki Komiya
  • Patent number: 9633605
    Abstract: A pixel circuit includes a first path coupled to a gate of a driving transistor and a second path passing through a source and drain of the driving transistor. An initialization voltage of the driving transistor is set based on a gray scale data voltage carried along the first path. A voltage is stored in a capacitor coupled to the gate of the driving transistor based on the gray scale data voltage carried along the second path. The voltage stored in the capacitor is based on the gray scale data voltage, and may be compensated for variation in a threshold voltage of the driving transistor.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: April 25, 2017
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ryo Ishii, Daisuke Kawae, Masayuki Kumeta, Eiji Kanda, Takeshi Okuno
  • Patent number: 9633598
    Abstract: A method for driving a display device includes driving a first pixel circuit based on first and second fields of a frame, and driving a second pixel circuit based on first and second fields of the frame. The first field of the first pixel circuit overlaps the second field of the second pixel circuit. The second field of the first pixel circuit overlaps the first field of the second pixel circuit. Operations performed in the first field include storing a gray scale data voltage, and operations performed in the second field include supplying an amount of current to a light emitter based on the stored gray scale data voltage. The first and second pixel circuits are in adjacent rows of the display device.
    Type: Grant
    Filed: May 5, 2014
    Date of Patent: April 25, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Takeshi Okuno, Masayuki Kumeta, Eiji Kanda, Ryo Ishii, Naoaki Komiya
  • Patent number: 9613567
    Abstract: A display device includes a pixel circuit having a driving transistor for driving a light-emitting element based on a gradation voltage held by a holding capacitor. The display device performs a first writing of gradation data using a first initialization voltage and a second writing of the gradation data using a second initialization voltage.
    Type: Grant
    Filed: December 11, 2013
    Date of Patent: April 4, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Takeshi Okuno, Masayuki Kumeta, Eiji Kanda, Ryo Ishii, Naoaki Komiya
  • Patent number: 9576530
    Abstract: An optoelectronic device includes a first transistor, a second transistor, and a control circuit. The first transistor is electrically connected between a power supply and a light-emitting element, has a gate to receive a gray scale voltage, and supplies the light-emitting element with a driving current corresponding to the gray scale voltage. The second transistor has a gate electrically connected to an electrode of the light-emitting element and a source or drain electrically connected to a circuit including a voltmeter. The control circuit reads a measurement value of the voltmeter when the gate of the first transistor receives the gray scale voltage, and corrects a next gray scale voltage applied to the gate of the first transistor based on the measurement value.
    Type: Grant
    Filed: August 26, 2014
    Date of Patent: February 21, 2017
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Eiji Kanda, Takeshi Okuno, Masayuki Kumeta, Daisuke Kawae, Ryo Ishii, Naoaki Komiya
  • Patent number: 9576533
    Abstract: A display apparatus includes a display unit, a control unit, and a compensation unit. The compensation unit may compensate the display data when a sensing operation is performed on a target pixel circuit, the compensation unit compensating display data by setting a light emission amount of light emitting element of a target pixel circuit to be an amount obtained by subtracting a sensing light emission amount, which is a light emission amount of the light emitting element of the target pixel circuit during a sensing interval, from a display light emission amount, which is a light emission amount of the light emitting element of the target pixel circuit before the compensation.
    Type: Grant
    Filed: February 19, 2015
    Date of Patent: February 21, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Masayuki Kumeta, Ryo Ishii, Eiji Kanda, Naoaki Komiya
  • Patent number: 9552766
    Abstract: An electroluminescence display device includes a controller which generates signals for controlling at least one pixel circuit during a first period and a second period. The controller controls current to a light-emitting element of the at least one pixel circuit based on a data voltage in the first period. The controller controls a supplying period of current to the light-emitting element based on a duty control voltage in the second period. The supplying period when the pixel circuit is driven at a first gray scale value is longer than that when the pixel circuit is driven at a second gray scale. The first gray scale value is greater than the second gray scale value.
    Type: Grant
    Filed: August 26, 2014
    Date of Patent: January 24, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Masayuki Kumeta, Takeshi Okuno, Eiji Kanda, Ryo Ishii, Daisuke Kawae
  • Publication number: 20170004774
    Abstract: A pixel includes five transistors and a capacitor. A first transistor controls current to be supplied to a light-emitting element. A second transistor is connected between a gate electrode of the first transistor and a first power supply. A third transistor is connected between the gate electrode of the first transistor and a second terminal of the first transistor. The capacitor is coupled between the third transistor and the second terminal of the first transistor. The fourth transistor is connected between the second terminal of the first transistor and a second power supply. The fifth transistor is connected between the second terminal of the third transistor and a signal line. The capacitor may be the only capacitor in the pixel, and the signal line may receive an initialization voltage and a gray scale data voltage.
    Type: Application
    Filed: September 2, 2016
    Publication date: January 5, 2017
    Inventors: Masayuki KUMETA, Takeshi OKUNO, Eiji KANDA, Ryo ISHII, Naoaki KOMIYA
  • Patent number: 9514674
    Abstract: A display device includes a driving transistor in a pixel circuit. A signal line is connected to a source or drain of the driving transistor. The source or drain of the driving transistor receives a power source voltage, an initialization voltage, and a data voltage through the signal line during different periods of operation. The periods of operation include an emission and non-emission periods.
    Type: Grant
    Filed: April 16, 2014
    Date of Patent: December 6, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Masayuki Kumeta, Takeshi Okuno, Eiji Kanda, Ryo Ishii, Naoaki Komiya
  • Patent number: 9495906
    Abstract: A pixel circuit is provided which includes a light-emitting element; a driving transistor configured to control an amount of current supplied from a first power line to the light-emitting element according to a pixel voltage; a capacitor having one end connected to a second power line and the other end connected to a gate of the driving transistor and configured to hold the pixel voltage; a first switch transistor configured to selectively switch the pixel voltage provided through a data signal line into the capacitor; and a second switch transistor configured to selectively connect the first power line and the second power line. The first and second power lines are separated during a period where the capacitor is charged by the pixel voltage, and are shorted during a period where the driving transistor operates according to the pixel voltage.
    Type: Grant
    Filed: December 11, 2013
    Date of Patent: November 15, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ryo Ishii, Daisuke Kawae, Masayuki Kumeta, Naoaki Komiya
  • Patent number: 9437136
    Abstract: A pixel includes five transistors and a capacitor. A first transistor controls current to be supplied to a light-emitting element. A second transistor is connected between a gate electrode of the first transistor and a first power supply. A third transistor is connected between the gate electrode of the first transistor and a second terminal of the first transistor. The capacitor is coupled between the third transistor and the second terminal of the first transistor. The fourth transistor is connected between the second terminal of the first transistor and a second power supply. The fifth transistor is connected between the second terminal of the third transistor and a signal line. The capacitor may be the only capacitor in the pixel, and the signal line may receive an initialization voltage and a gray scale data voltage.
    Type: Grant
    Filed: July 1, 2014
    Date of Patent: September 6, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Masayuki Kumeta, Takeshi Okuno, Eiji Kanda, Ryo Ishii, Naoaki Komiya
  • Patent number: 9412295
    Abstract: A pixel circuit including a light emitting element outputting a gray scale based on a current supplied thereto, a first transistor configured to control an amount of current supplied to the light emitting element based on a gray scale data voltage supplied to a gate electrode of the first transistor, a second transistor connected between the gate electrode of the first transistor and an initialization voltage, a third transistor connected between the gate electrode of the first transistor and a first terminal of the first transistor; a fourth transistor connected between the first terminal of the first transistor and the light emitting element, and a fifth transistor connected between a second terminal of the first transistor and a data line. The data line is selectively supplied with the gray scale data voltage and a power supply voltage for light emitting of the light emitting element to the fifth transistor.
    Type: Grant
    Filed: May 5, 2014
    Date of Patent: August 9, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Takeshi Okuno, Masayuki Kumeta, Eiji Kanda, Ryo Ishii, Naoaki Komiya
  • Patent number: 9406249
    Abstract: An optoelectronic device includes a driving transistor, a correction transistor, and a control circuit. The driving transistor adjusts a first current from a power supply based on a voltage stored in a first capacitor. The driving transistor supplies the adjusted first current to the light-emitting element. The correction transistor is electrically connected on a path of a second current flowing from the power supply to the first capacitor, and adjusts the second current based on a voltage stored in a second capacitor. The control circuit controls the second capacitor to store a gray scale voltage while the first current flows, and controls flow of the second current to update the voltage stored in the first capacitor while the first current is blocked.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: August 2, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Eiji Kanda, Takeshi Okuno, Masayuki Kumeta, Daisuke Kawae, Ryo Ishii, Naoaki Komiya
  • Publication number: 20160163025
    Abstract: A display device includes pixel circuits, data lines, and data selection switches. The data lines includes first and second group of data lines. Each of the first group of data lines is connected to one of the pixel circuits in a first column (or row) of the pixel circuits. Each of the second group of data lines is connected to one of the pixels in a second column (or row) of the pixel circuits. Each of the data selection switches connects one of the first group of data lines and one of driver output ports in response to a switching control signal. The first group of data lines includes a first data line connected to a first pixel circuit of the pixel circuits and a second data line connected to a second pixel circuit adjacent to the first pixel circuit.
    Type: Application
    Filed: September 30, 2015
    Publication date: June 9, 2016
    Inventors: MASAYUKI KUMETA, Ryo Ishii