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).
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Patent number: 11929002Abstract: 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: GrantFiled: February 17, 2021Date of Patent: March 12, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Dongwon Moon, Sungyoon Jo, Naoaki Komiya, Sang-Gon Lee
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Publication number: 20210256893Abstract: 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: ApplicationFiled: February 17, 2021Publication date: August 19, 2021Inventors: Dongwon Moon, Sungyoon Jo, Naoaki Komiya, Sang-Gon Lee
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Patent number: 10978001Abstract: 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: GrantFiled: August 23, 2019Date of Patent: April 13, 2021Assignee: Samsung Display Co., Ltd.Inventors: Hai-Jung In, Naoaki Komiya
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Publication number: 20200105199Abstract: 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: ApplicationFiled: August 23, 2019Publication date: April 2, 2020Inventors: Hai-Jung IN, Naoaki KOMIYA
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Patent number: 10068527Abstract: 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: GrantFiled: September 2, 2016Date of Patent: September 4, 2018Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Masayuki Kumeta, Takeshi Okuno, Eiji Kanda, Ryo Ishii, Naoaki Komiya
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Patent number: 10019937Abstract: 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: GrantFiled: February 5, 2016Date of Patent: July 10, 2018Assignee: Samsung Display Co., Ltd.Inventors: Young Wook Yoo, Naoaki Komiya
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Patent number: 9646534Abstract: 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: GrantFiled: May 8, 2015Date of Patent: May 9, 2017Assignee: Samsung Display Co., Ltd.Inventors: Youngwook Yoo, Naoaki Komiya
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Patent number: 9633625Abstract: 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: GrantFiled: May 21, 2014Date of Patent: April 25, 2017Assignee: Samsung Display Co., Ltd.Inventors: Masayuki Kumeta, Takeshi Okuno, Eiji Kanda, Ryo Ishii, Naoaki Komiya
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Patent number: 9633598Abstract: 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: GrantFiled: May 5, 2014Date of Patent: April 25, 2017Assignee: Samsung Display Co., Ltd.Inventors: Takeshi Okuno, Masayuki Kumeta, Eiji Kanda, Ryo Ishii, Naoaki Komiya
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Patent number: 9633592Abstract: 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: GrantFiled: October 1, 2014Date of Patent: April 25, 2017Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Masayuki Kumeta, Ryo Ishii, Takeshi Okuno, Eiji Kanda, Daisuke Kawae, Naoaki Komiya
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Patent number: 9613567Abstract: 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: GrantFiled: December 11, 2013Date of Patent: April 4, 2017Assignee: Samsung Display Co., Ltd.Inventors: Takeshi Okuno, Masayuki Kumeta, Eiji Kanda, Ryo Ishii, Naoaki Komiya
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Patent number: 9576530Abstract: 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: GrantFiled: August 26, 2014Date of Patent: February 21, 2017Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Eiji Kanda, Takeshi Okuno, Masayuki Kumeta, Daisuke Kawae, Ryo Ishii, Naoaki Komiya
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Patent number: 9576533Abstract: 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: GrantFiled: February 19, 2015Date of Patent: February 21, 2017Assignee: Samsung Display Co., Ltd.Inventors: Masayuki Kumeta, Ryo Ishii, Eiji Kanda, Naoaki Komiya
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Publication number: 20170004774Abstract: 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: ApplicationFiled: September 2, 2016Publication date: January 5, 2017Inventors: Masayuki KUMETA, Takeshi OKUNO, Eiji KANDA, Ryo ISHII, Naoaki KOMIYA
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Patent number: 9514674Abstract: 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: GrantFiled: April 16, 2014Date of Patent: December 6, 2016Assignee: Samsung Display Co., Ltd.Inventors: Masayuki Kumeta, Takeshi Okuno, Eiji Kanda, Ryo Ishii, Naoaki Komiya
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Publication number: 20160351127Abstract: 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: ApplicationFiled: February 5, 2016Publication date: December 1, 2016Inventors: Young Wook YOO, Naoaki KOMIYA
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Patent number: 9495906Abstract: 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: GrantFiled: December 11, 2013Date of Patent: November 15, 2016Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Ryo Ishii, Daisuke Kawae, Masayuki Kumeta, Naoaki Komiya
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Patent number: 9472140Abstract: 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: GrantFiled: October 15, 2014Date of Patent: October 18, 2016Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Eiji Kanda, Takeshi Okuno, Naoaki Komiya
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Patent number: 9437141Abstract: 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: GrantFiled: July 27, 2011Date of Patent: September 6, 2016Assignee: 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
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Patent number: 9437136Abstract: 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: GrantFiled: July 1, 2014Date of Patent: September 6, 2016Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Masayuki Kumeta, Takeshi Okuno, Eiji Kanda, Ryo Ishii, Naoaki Komiya