Patents by Inventor Naoaki Komiya

Naoaki Komiya 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: 20210256893
    Abstract: A method of calculating a gamma-value for a display panel includes displaying a first color test image having a first target gray-level and then measuring a first luminance-value implemented by at least one first color-pixel included in a jth display-area, displaying a second color test image having the first target gray-level and then measuring a second luminance-value implemented by at least one second color-pixel included in the jth display-area, deriving an estimated driving current flowing in the second color-pixel at the first target gray-level based on RGB gray level-driving current curves, deriving a second target gray-level when the estimated driving current flows in the first color-pixel based on the RGB gray level-driving current curves, and calculating a target gamma-value to be applied to the first color-pixel included in the jth display-area based on the first target gray-level, the second target gray-level, the first luminance-value, and the second luminance-value.
    Type: Application
    Filed: February 17, 2021
    Publication date: August 19, 2021
    Inventors: Dongwon Moon, Sungyoon Jo, Naoaki Komiya, Sang-Gon Lee
  • Patent number: 10978001
    Abstract: A pixel of a display panel includes a storage capacitor, at least one scan transistor to transfer first and second voltages to ends of the storage capacitor in response to a scan signal, a driving transistor to generate a driving current based on a difference between the first voltage and the second voltage stored in the storage capacitor, at least one emission transistor to selectively provide the driving current to an organic light emitting diode in response to an emission control signal, and the organic light emitting diode to emit light, wherein the first voltage is a sum of a data voltage and a pixel deviation compensation voltage for compensating a threshold voltage deviation between pixels included in the display panel, and wherein the second voltage is a panel deviation compensation voltage for compensating a threshold voltage deviation between display panels manufactured by a same process for the display panel.
    Type: Grant
    Filed: August 23, 2019
    Date of Patent: April 13, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hai-Jung In, Naoaki Komiya
  • Publication number: 20200105199
    Abstract: A pixel of a display panel includes a storage capacitor, at least one scan transistor to transfer first and second voltages to ends of the storage capacitor in response to a scan signal, a driving transistor to generate a driving current based on a difference between the first voltage and the second voltage stored in the storage capacitor, at least one emission transistor to selectively provide the driving current to an organic light emitting diode in response to an emission control signal, and the organic light emitting diode to emit light, wherein the first voltage is a sum of a data voltage and a pixel deviation compensation voltage for compensating a threshold voltage deviation between pixels included in the display panel, and wherein the second voltage is a panel deviation compensation voltage for compensating a threshold voltage deviation between display panels manufactured by a same process for the display panel.
    Type: Application
    Filed: August 23, 2019
    Publication date: April 2, 2020
    Inventors: Hai-Jung IN, Naoaki KOMIYA
  • 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: 10019937
    Abstract: A flexible display device includes a sensing line, a sensor, and a signal controller. The sensor generates a sensing signal corresponding to a quantity of light of the sensing line. The signal controller detects an intersection of the sensing line and the sensor and generates a control signal corresponding to movement of the intersection.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: July 10, 2018
    Assignee: Samsung Display Co., Ltd.
    Inventors: Young Wook Yoo, Naoaki Komiya
  • Patent number: 9646534
    Abstract: An organic light-emitting display apparatus including at least one pixel including an OLED, a first transistor connected to a connection line, a second transistor connected to a power line, and to the first transistor, a third transistor connected to a data line, a fourth transistor connected to the third transistor, and to the first transistor, a fifth connected to the fourth transistor, a sixth transistor connected to the fifth transistor, and to the fifth transistor, a seventh transistor connected to the fifth transistor, and to the OLED, and first and second capacitors connected between electrodes of the fourth and fifth transistors, respectively.
    Type: Grant
    Filed: May 8, 2015
    Date of Patent: May 9, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Youngwook Yoo, 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: 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: 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: 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: 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: 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
  • 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
  • Publication number: 20160351127
    Abstract: A flexible display device includes a sensing line, a sensor, and a signal controller. The sensor generates a sensing signal corresponding to a quantity of light of the sensing line. The signal controller detects an intersection of the sensing line and the sensor and generates a control signal corresponding to movement of the intersection.
    Type: Application
    Filed: February 5, 2016
    Publication date: December 1, 2016
    Inventors: Young Wook YOO, 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: 9472140
    Abstract: A device includes pixel circuits arranged in columns and rows, n data lines (n being an integer of 2 or more) for each column, gate lines supplied with scan signals, and light-emitting control lines supplied with light-emitting control signals. The pixel circuits are divided into n groups of rows, each group of rows being exclusively connected to a corresponding data line. Each pixel circuit includes a write control transistor to control writing a data voltage in response to a scan signal, a driving transistor to control the amount of current to be supplied to a current light-emitting element, a light-emitting control transistor to control supply of a current to the light-emitting element in response to a light-emitting control signal, a capacitor to retain a voltage corresponding to a write data voltage, and a reset transistor to set the gate electrode of the driving transistor with the initial voltage.
    Type: Grant
    Filed: October 15, 2014
    Date of Patent: October 18, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Eiji Kanda, Takeshi Okuno, 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: 9437141
    Abstract: A scan driver includes: a plurality of scan driving blocks including an output terminal outputting a scan signal to a scan line; a first transistor transmitting a voltage of a power source to the output terminal; a second transistor transmitting a clock signal to the output terminal; and a third transistor including a gate electrode connected to a node formed with a gate-on voltage turning on the second transistor, one terminal connected to the power source, and the other terminal connected to the gate electrode of the first transistor. The scan driver may reduce the influence of a leakage current even though application of the scan signal is increased, and a scan signal of a uniform voltage level may be output.
    Type: Grant
    Filed: July 27, 2011
    Date of Patent: September 6, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Wang-Jo Lee, Hyung-Soo Kim, In-Ho Choi, Choon-Yul Oh, Ho-Ryun Chung, Joo-Hyeon Jeong, Myoung-Hwan Yoo, Jin-Woo Kim, 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