Patents by Inventor Osung DO
Osung DO 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: 11107420Abstract: The display device according to the present disclosure may comprise a display panel equipped with a plurality of pixels connected to data lines and sensing lines; a source drive IC configured to provide a data voltage to a pixel through the sensing line and equipped with a sensing block obtaining sensing data related to driving characteristics of the pixel using a signal input through the sensing line; a switch configured to control a connection via the sensing line between the pixel and the sensing block; and a power source configured to provide a test voltage or a test current to the sensing block, and the source drive IC may obtain calibration data for the sensing block by using the test voltage or the test current in a state that the switch disconnects the pixel and the sensing block.Type: GrantFiled: November 15, 2017Date of Patent: August 31, 2021Assignee: LG DISPLAY CO., LTD.Inventors: Seokhyun Hong, Jaeyoon Bae, OSung Do, Taeyoung Lee
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Patent number: 11030951Abstract: A light-emitting display includes a display panel, a first circuit, and a second circuit. The display panel comprises a pixel. The first circuit supplies a data voltage to a data line for the pixel. The second circuit performs a sensing operation for sensing a sensing line for the pixel and outputs a voltage required for the sensing operation, and outputs a noise removing voltage for cancelling out noise formed on the sensing line during the sensing operation.Type: GrantFiled: December 9, 2019Date of Patent: June 8, 2021Assignee: LG Display Co., Ltd.Inventors: Changwoo Lee, Jaeik Yoo, Osung Do
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Patent number: 10896644Abstract: A display device includes a display panel, a driving circuit, a sensing circuit, and a compensation circuit. The display panel includes a first pixel and a second pixel. The driving circuit provides a preset sensing voltage to the first pixel of the display panel, and provides a dummy voltage to the second pixel of the display panel. A first channel of a sensing circuit generates a first integrated voltage signal indicative of a magnitude of a first pixel current generated by the first pixel. A second channel of the sensing circuit generates a second integrated voltage signal indicative of a magnitude of a first dummy current generated by the second pixel. The compensation circuit determines a compensation amount from a difference between an output of the first and second channels of the sensing circuit, and compensates a display voltage of the first pixel by the compensation amount.Type: GrantFiled: December 2, 2019Date of Patent: January 19, 2021Assignee: LG Display Co., Ltd.Inventors: Osung Do, Changwoo Lee
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Publication number: 20200202787Abstract: A display device includes a display panel, a driving circuit, a sensing circuit, and a compensation circuit. The display panel includes a first pixel and a second pixel. The driving circuit provides a preset sensing voltage to the first pixel of the display panel, and provides a dummy voltage to the second pixel of the display panel. A first channel of a sensing circuit generates a first integrated voltage signal indicative of a magnitude of a first pixel current generated by the first pixel. A second channel of the sensing circuit generates a second integrated voltage signal indicative of a magnitude of a first dummy current generated by the second pixel. The compensation circuit determines a compensation amount from a difference between an output of the first and second channels of the sensing circuit, and compensates a display voltage of the first pixel by the compensation amount.Type: ApplicationFiled: December 2, 2019Publication date: June 25, 2020Inventors: Osung DO, Changwoo LEE
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Publication number: 20200202777Abstract: A light-emitting display includes a display panel, a first circuit, and a second circuit. The display panel comprises a pixel. The first circuit supplies a data voltage to a data line for the pixel. The second circuit performs a sensing operation for sensing a sensing line for the pixel and outputs a voltage required for the sensing operation, and outputs a noise removing voltage for cancelling out noise formed on the sensing line during the sensing operation.Type: ApplicationFiled: December 9, 2019Publication date: June 25, 2020Inventors: Changwoo LEE, Jaeik YOO, Osung DO
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Patent number: 10467960Abstract: The present disclosure relates to an electroluminescent display device and a driving method of the same. The electroluminescent display device comprises a display panel, including a plurality of data lines, a plurality of sensing lines, a plurality of gate lines, and pixels which are arranged in matrix at each intersection between those lines to form a plurality of display lines; a sensing circuit, for sensing a pixel current in the pixels, integrating the pixel current to obtain a sensing voltage, and generating a sensing data based on the sensing voltage during a sensing operation period; and a compensation unit for calculating a compensation value for electrical characteristics of the pixels based on the sensing data.Type: GrantFiled: December 29, 2017Date of Patent: November 5, 2019Assignee: LG Display Co., Ltd.Inventors: Osung Do, Kyoungdon Woo, Hyuckjun Kim, Jaeyoon Bae
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Patent number: 10347692Abstract: An organic light emitting display device in an embodiment of the present invention comprises a display panel equipped with a plurality of pixels each including an OLED and a driving TFT for driving the OLED and a sensing circuit connected to pixels through a sensing line and detecting driving characteristics of a corresponding pixel. The sensing circuit may comprise a plural sensing units including an integrator for integrating currents respectively flowing two adjacent sensing lines connected to inverting and non-inverting input terminals of a fully differential amplifier, a sampling unit for respectively sampling two integral outputs of the integrator and a scaler for regulating an operating range of outputs of the sampling unit, a differential amplifier for differentially amplifying one or more outputs of the scaler, and an ADC for converting an output of the differential amplifier into a digital sensing value.Type: GrantFiled: October 24, 2017Date of Patent: July 9, 2019Assignee: LG DISPLAY CO., LTD.Inventors: Taeyoung Lee, Changwoo Lee, Osung Do
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Patent number: 10319286Abstract: The display device according to an embodiment of the present disclosure comprises a display panel; a source drive IC configured to provide data voltages to the pixels, convert signals indicating driving characteristics of the pixels into sensing data and output the sensing data; and a timing controller configured to transmit a control data packet and a video data packet to the source drive IC through first and second wire pairs and receive the sensing data from the source drive IC through the second wire pair, wherein the timing controller is configured to load lock information indicating whether a clock extracted from a signal provided from the source drive IC through the second wire pair is locked or not into the control data packet and provide the control data packet to the source drive IC through the first wire pair, when receiving data from the source drive IC.Type: GrantFiled: October 13, 2017Date of Patent: June 11, 2019Assignee: LG Display Co., Ltd.Inventors: Osung Do, Juyoung Noh
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Publication number: 20190035331Abstract: The present disclosure relates to an electroluminescent display device and a driving method of the same. The electroluminescent display device comprises a display panel, including a plurality of data lines, a plurality of sensing lines, a plurality of gate lines, and pixels which are arranged in matrix at each intersection between those lines to form a plurality of display lines; a sensing circuit, for sensing a pixel current in the pixels, integrating the pixel current to obtain a sensing voltage, and generating a sensing data based on the sensing voltage during a sensing operation period; and a compensation unit for calculating a compensation value for electrical characteristics of the pixels based on the sensing data.Type: ApplicationFiled: December 29, 2017Publication date: January 31, 2019Applicant: LG Display Co., Ltd.Inventors: Osung DO, Kyoungdon WOO, Hyuckjun KIM, Jaeyoon BAE
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Patent number: 10089928Abstract: The sensing method for an organic light-emitting display comprises: defining a pixel group comprising a reference pixel and two or more valid pixels, among a plurality of pixels arranged on a horizontal line; obtaining a black level current sensing value by applying a black level data voltage to the reference pixel; obtaining a current sensing value for a given gray level by applying a data voltage for the given gray level higher than the black level to each of the valid pixels; and obtaining a pixel current sensing value by subtracting the black level current sensing value from the current sensing value for the given gray level to eliminate common noise.Type: GrantFiled: July 20, 2017Date of Patent: October 2, 2018Assignee: LG Display Co., Ltd.Inventors: Jaeik Yoo, Myunggi Lim, Osung Do
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Publication number: 20180144689Abstract: The display device according to the present disclosure may comprise a display panel equipped with a plurality of pixels connected to data lines and sensing lines; a source drive IC configured to provide a data voltage to a pixel through the sensing line and equipped with a sensing block obtaining sensing data related to driving characteristics of the pixel using a signal input through the sensing line; a switch configured to control a connection via the sensing line between the pixel and the sensing block; and a power source configured to provide a test voltage or a test current to the sensing block, and the source drive IC may obtain calibration data for the sensing block by using the test voltage or the test current in a state that the switch disconnects the pixel and the sensing block.Type: ApplicationFiled: November 15, 2017Publication date: May 24, 2018Applicant: LG Display Co., Ltd.Inventors: Seokhyun HONG, Jaeyoon BAE, OSung DO, Taeyoung LEE
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Publication number: 20180122294Abstract: The display device according to an embodiment of the present disclosure comprises a display panel; a source drive IC configured to provide data voltages to the pixels, convert signals indicating driving characteristics of the pixels into sensing data and output the sensing data; and a timing controller configured to transmit a control data packet and a video data packet to the source drive IC through first and second wire pairs and receive the sensing data from the source drive IC through the second wire pair, wherein the timing controller is configured to load lock information indicating whether a clock extracted from a signal provided from the source drive IC through the second wire pair is locked or not into the control data packet and provide the control data packet to the source drive IC through the first wire pair, when receiving data from the source drive IC.Type: ApplicationFiled: October 13, 2017Publication date: May 3, 2018Inventors: Osung DO, Juyoung NOH
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Publication number: 20180114815Abstract: An organic light emitting display device in an embodiment of the present invention comprises a display panel equipped with a plurality of pixels each including an OLED and a driving TFT for driving the OLED and a sensing circuit connected to pixels through a sensing line and detecting driving characteristics of a corresponding pixel. The sensing circuit may comprise a plural sensing units including an integrator for integrating currents respectively flowing two adjacent sensing lines connected to inverting and non-inverting input terminals of a fully differential amplifier, a sampling unit for respectively sampling two integral outputs of the integrator and a scaler for regulating an operating range of outputs of the sampling unit, a differential amplifier for differentially amplifying one or more outputs of the scaler, and an ADC for converting an output of the differential amplifier into a digital sensing value.Type: ApplicationFiled: October 24, 2017Publication date: April 26, 2018Applicant: LG DISPLAY CO., LTD.Inventors: Taeyoung LEE, Changwoo LEE, Osung DO
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Patent number: 9941018Abstract: A gate driving circuit and a display device using the same are discussed. The gate driving circuit according to an embodiment includes a first shift register configured to sequentially shift a gate start pulse in response to a gate shift clock and output a gate pulse shifted on a per block basis, each block including a plurality of gate lines, a second shift register configured to sequentially shift the gate start pulse in response to the gate shift clock and output a gate pulse shifted on a per gate line basis, and a controller configured to supply the gate shift clock to one of the first and second shift registers.Type: GrantFiled: September 17, 2015Date of Patent: April 10, 2018Assignee: LG DISPLAY CO., LTD.Inventors: Seokhyun Hong, Chulwon Lee, Juyoung Noh, Osung Do
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Patent number: 9928782Abstract: A four-primary-color organic light emitting display comprises: a display panel where a plurality of first-color pixels, second-color pixels, third-color pixels, and fourth-color pixels are disposed; and a data drive circuit that has a single, digital-to-analog converter to generate first- to fourth-color data voltages and to apply the first-color data voltage to the first-color pixels, the second-color data voltage to the second-color pixels, the third-color data voltage to the third-color pixels, and the fourth-color data voltage to the fourth-color pixels. Herein, the maximum grayscale voltages for the first- to fourth-color data voltages are adjusted to be different on a single gamma graph defined as the input grayscale versus output voltage.Type: GrantFiled: April 27, 2016Date of Patent: March 27, 2018Assignee: LG Display Co., Ltd.Inventors: Osung Do, Kyoungdon Woo, Seokhyun Hong
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Publication number: 20180033366Abstract: The sensing method for an organic light-emitting display comprises: defining a pixel group comprising a reference pixel and two or more valid pixels, among a plurality of pixels arranged on a horizontal line; obtaining a black level current sensing value by applying a black level data voltage to the reference pixel; obtaining a current sensing value for a given gray level by applying a data voltage for the given gray level higher than the black level to each of the valid pixels; and obtaining a pixel current sensing value by subtracting the black level current sensing value from the current sensing value for the given gray level to eliminate common noise.Type: ApplicationFiled: July 20, 2017Publication date: February 1, 2018Inventors: Jaeik YOO, Myunggi LIM, Osung DO
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Publication number: 20160322001Abstract: A four-primary-color organic light emitting display comprises: a display panel where a plurality of first-color pixels, second-color pixels, third-color pixels, and fourth-color pixels are disposed; and a data drive circuit that has a single, digital-to-analog converter to generate first- to fourth-color data voltages and to apply the first-color data voltage to the first-color pixels, the second-color data voltage to the second-color pixels, the third-color data voltage to the third-color pixels, and the fourth-color data voltage to the fourth-color pixels. Herein, the maximum grayscale voltages for the first- to fourth-color data voltages are adjusted to be different on a single gamma graph defined as the input grayscale versus output voltage.Type: ApplicationFiled: April 27, 2016Publication date: November 3, 2016Inventors: Osung DO, Kyoungdon WOO, Seokhyun HONG
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Publication number: 20160078834Abstract: A gate driving circuit and a display device using the same are discussed. The gate driving circuit according to an embodiment includes a first shift register configured to sequentially shift a gate start pulse in response to a gate shift clock and output a gate pulse shifted on a per block basis, each block including a plurality of gate lines, a second shift register configured to sequentially shift the gate start pulse in response to the gate shift clock and output a gate pulse shifted on a per gate line basis, and a controller configured to supply the gate shift clock to one of the first and second shift registers.Type: ApplicationFiled: September 17, 2015Publication date: March 17, 2016Applicant: LG DISPLAY CO., LTD.Inventors: Seokhyun HONG, Chulwon LEE, Juyoung NOH, Osung DO