Patents by Inventor Oh Kyong Kwon

Oh Kyong Kwon 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: 20200320936
    Abstract: A display apparatus includes a plurality of pixels. A pixel includes a first capacitor connected between a first voltage line receiving a first driving signal and a first node, a first transistor comprising a control electrode connected to the first node, a first electrode connected to a second voltage line receiving a first power source signal and a second electrode connected to a second node, an organic light emitting diode comprising an anode electrode connected to the second node and a cathode electrode receiving a second power source signal, a second capacitor connected between an m-th data line and the second node (wherein, ‘m’ is a natural number) and a second transistor comprising a control electrode connected to an n-th scan line (wherein, ‘n’ is a natural number), a first electrode connected to the first node and a second electrode connected to the second node.
    Type: Application
    Filed: June 23, 2020
    Publication date: October 8, 2020
    Inventors: Chong-Chul CHAI, Oh-Kyong KWON, Nack-Hyeon KEUM, Kyong-Hwan OH, Young-Wan SEO, Yong-Koo HER, In-Jae HWANG
  • Patent number: 10733941
    Abstract: A pixel includes a first transistor connected between a line supplying a power supply voltage and a second node, and providing a driving current corresponding to a data voltage to a light emitting element based on a voltage of a first node, a third transistor connected between the first node and a line supplying a reference voltage, and generating a sampling current based on a difference between a voltage of the second node and the reference voltage, a second transistor connected between the line supplying the power supply voltage and the first node, adjusting the voltage of the first node to generate the sampling current based on a voltage of a third node, a fourth transistor transferring the power supply voltage to the third node, a fifth transistor transferring the data voltage to the second node, and a capacitor connected between the first node and the third node.
    Type: Grant
    Filed: October 22, 2018
    Date of Patent: August 4, 2020
    Assignees: SAMSUNG DISPLAY CO., LTD., INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY
    Inventors: Chongchul Chai, Ansu Lee, Boyong Chung, Oh-Kyong Kwon, Nack-Hyeon Keum
  • Patent number: 10733938
    Abstract: A display apparatus includes a plurality of pixels. A pixel includes a first capacitor connected between a first voltage line receiving a first driving signal and a first node, a first transistor comprising a control electrode connected to the first node, a first electrode connected to a second voltage line receiving a first power source signal and a second electrode connected to a second node, an organic light emitting diode comprising an anode electrode connected to the second node and a cathode electrode receiving a second power source signal, a second capacitor connected between an m-th data line and the second node (wherein, ‘m’ is a natural number) and a second transistor comprising a control electrode connected to an n-th scan line (wherein, ‘n’ is a natural number), a first electrode connected to the first node and a second electrode connected to the second node.
    Type: Grant
    Filed: April 22, 2019
    Date of Patent: August 4, 2020
    Assignees: SAMSUNG DISPLAY CO., LTD., INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY
    Inventors: Chong-Chul Chai, Oh-Kyong Kwon, Nack-Hyeon Keum, Kyong-Hwan Oh, Young-Wan Seo, Yong-Koo Her, In-Jae Hwang
  • Patent number: 10700146
    Abstract: A pixel includes first through fourth transistors and storage capacitor. The first transistor controls an amount of current flowing from a first driving power source to a second driving power source, via an organic light-emitting diode, based on a voltage of a first node. The second transistor is coupled between a first electrode of the first transistor and the first node, and is turned on when a scan signal is supplied to a scan line. The third transistor is coupled between a second electrode of the first transistor and a reference power source, and is turned on when the scan signal is supplied. The fourth transistor is coupled between an anode electrode of the organic light-emitting diode and a data line, and is turned on when the scan signal is supplied. The storage capacitor is coupled between the first node and the anode electrode of the organic light-emitting diode.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: June 30, 2020
    Assignees: SAMSUNG DISPLAY CO., LTD., IUCF-HYU (Industry-University Cooperation Foundation Hanyang University)
    Inventors: Chong Chul Chai, Oh Kyong Kwon, Nack Hyeon Keum, Kyong Hwan Oh, Bo Yong Chung, An Su Lee
  • Patent number: 10627954
    Abstract: A driving circuit for a touch panel is disclosed. The driving circuit switches between a mutual capacitance sensing mode and a self capacitance sensing mode using the same sensing circuit. As such, the driving circuit for a touch panel implements a hybrid touch panel that is capable of sensing a touch in either a mutual capacitance sensing mode or a self capacitance sensing mode without requiring a complex and large driving circuit for separate sensing circuits for each mode.
    Type: Grant
    Filed: December 23, 2016
    Date of Patent: April 21, 2020
    Assignee: Industry-University Cooperation Foundation Hanyang University
    Inventor: Oh Kyong Kwon
  • Publication number: 20190251906
    Abstract: A display apparatus includes a plurality of pixels. A pixel includes a first capacitor connected between a first voltage line receiving a first driving signal and a first node, a first transistor comprising a control electrode connected to the first node, a first electrode connected to a second voltage line receiving a first power source signal and a second electrode connected to a second node, an organic light emitting diode comprising an anode electrode connected to the second node and a cathode electrode receiving a second power source signal, a second capacitor connected between an m-th data line and the second node (wherein, ‘m’ is a natural number) and a second transistor comprising a control electrode connected to an n-th scan line (wherein, ‘n’ is a natural number), a first electrode connected to the first node and a second electrode connected to the second node.
    Type: Application
    Filed: April 22, 2019
    Publication date: August 15, 2019
    Inventors: Chong-Chul CHAI, Oh-Kyong KWON, Nack-Hyeon KEUM, Kyong-Hwan OH, Young-Wan SEO, Yong-Koo HER, In-Jae HWANG
  • Publication number: 20190227652
    Abstract: A touch panel where touch/fingerprint recognition electrodes, including sub-pixels, pixels or pixel arrays in a row, share one sensing line is disclosed. The self capacitive touch panel comprises (m×n) sub-pixels, m and n being positive integer, respectively, and a driver configured to drive the sub-pixels. Here, touch/fingerprint recognition electrodes of sub-pixels in a row share one sensing line. Touch point detection and fingerprint recognition may be selectively driven through the touch panel and a readout method.
    Type: Application
    Filed: July 6, 2017
    Publication date: July 25, 2019
    Applicant: Industry-University Cooperation Foundation Hanyang University
    Inventor: Oh-Kyong KWON
  • Patent number: 10311793
    Abstract: A display apparatus includes a plurality of pixels. A pixel includes a first capacitor connected between a first voltage line receiving a first driving signal and a first node, a first transistor comprising a control electrode connected to the first node, a first electrode connected to a second voltage line receiving a first power source signal and a second electrode connected to a second node, an organic light emitting diode comprising an anode electrode connected to the second node and a cathode electrode receiving a second power source signal, a second capacitor connected between an m-th data line and the second node (wherein, ‘m’ is a natural number) and a second transistor comprising a control electrode connected to an n-th scan line (wherein, ‘n’ is a natural number), a first electrode connected to the first node and a second electrode connected to the second node.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: June 4, 2019
    Assignees: SAMSUNG DISPLAY CO., LTD., INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY
    Inventors: Chong-Chul Chai, Oh-Kyong Kwon, Nack-Hyeon Keum, Kyong-Hwan Oh, Young-Wan Seo, Yong-Koo Her, In-Jae Hwang
  • Publication number: 20190164501
    Abstract: A pixel includes a first transistor connected between a line supplying a power supply voltage and a second node, and providing a driving current corresponding to a data voltage to a light emitting element based on a voltage of a first node, a third transistor connected between the first node and a line supplying a reference voltage, and generating a sampling current based on a difference between a voltage of the second node and the reference voltage, a second transistor connected between the line supplying the power supply voltage and the first node, adjusting the voltage of the first node to generate the sampling current based on a voltage of a third node, a fourth transistor transferring the power supply voltage to the third node, a fifth transistor transferring the data voltage to the second node, and a capacitor connected between the first node and the third node.
    Type: Application
    Filed: October 22, 2018
    Publication date: May 30, 2019
    Inventors: Chongchul CHAI, Ansu LEE, Boyong CHUNG, Oh-Kyong KWON, Nack-Hyeon KEUM
  • Publication number: 20190138148
    Abstract: In the touch panel device and the operating method for the same according to the present invention, an entire scan is divided into a first scan and a second scan for determining a touch position. In the first scan, a plurality of transmission electrodes are configured into groups, and a signal is applied sequentially or simultaneously such that a first analysis position is determined. In the second scan, since a signal is sequentially or simultaneously applied only to the first analysis position, a plurality of sampling durations can sufficiently be provided such that a second analysis position, which is the exact touch position, can be determined.
    Type: Application
    Filed: January 4, 2019
    Publication date: May 9, 2019
    Applicant: Industry-University Cooperation Foundation Hanyang University
    Inventor: Oh-Kyong KWON
  • Patent number: 10213188
    Abstract: Disclosed herein are a high voltage switching circuit which includes one or more main switching devices connected to one or more current sources, and a control circuit unit configured to control a potential difference between terminals of each of the main switching devices within a predetermined range by receiving current from the one or more current sources.
    Type: Grant
    Filed: May 19, 2015
    Date of Patent: February 26, 2019
    Assignees: SAMSUNG ELECTRONICS CO., LTD., Industry-University Cooperation Foundation Hanyang University
    Inventors: Jong Keun Song, Taeho Jeon, Oh-Kyong Kwon, Sung-Jin Jung
  • Patent number: 10192491
    Abstract: A data driver capable of displaying images with a substantially uniform brightness, an organic light emitting display device using the same, and a method of driving the organic light emitting display device. The data driver includes a plurality of current sink units for controlling predetermined currents to flow through data lines, a plurality of voltage generators for resetting values of gray scale voltages using compensation voltages generated when the predetermined currents flow, a plurality of digital-to-analog converters for selecting one gray scale voltage among the gray scale voltages as a data signal in response to bit values of the data supplied from the outside, and a plurality of switching units for supplying the data signal to the data lines. The predetermined currents may be set equal to pixel currents that correspond to a maximum brightness.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: January 29, 2019
    Assignees: Samsung Display Co., Ltd., IUCF-HYU (Industry-University Cooperation Foundation Hanyang University)
    Inventors: Do Hyung Ryu, Bo Yong Chung, Hong Kwon Kim, Oh Kyong Kwon
  • Patent number: 10176762
    Abstract: A method of driving a display device including a sensing line, a light-emitting element, a capacitor, and a driving transistor, the driving transistor comprising a control terminal that is connected to the capacitor, an input terminal, and an output terminal the method including: connecting the control terminal and the output terminal; connecting the control terminal and the output terminal to a ground voltage and then disconnecting the control terminal and the output terminal from the ground voltage; sensing a first voltage of the control terminal through the sensing line; and calculating a threshold voltage of the driving transistor based on the first voltage.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: January 8, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ung-Gyu Min, Oh-Kyong Kwon
  • Publication number: 20180364855
    Abstract: A driving circuit for a touch panel capable of operating selectively a mutual capacitance sensing mode or a self conductance sensing mode using one sensing circuit and a touch sensing method using the same are disclosed. The driving circuit includes a mode selection operating unit configured to perform selectively a mutual capacitance sensing mode and a self capacitance sensing mode through a switching operation and a conversion unit connected to the mode selection operating unit. Here, the mode selection operating unit senses change of capacitance in response to touch of the touch panel in a selected mode, and the conversion unit converts the changed capacitance to touch data.
    Type: Application
    Filed: December 23, 2016
    Publication date: December 20, 2018
    Applicant: IUCF-HYU (INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY)
    Inventor: Oh Kyong KWON
  • Patent number: 10043455
    Abstract: A data driver and a display device including the same. The data driver includes a DA converting circuit converting a digital signal into an analog signal and an output circuit disposed downstream of the DA converting circuit. The output circuit outputs two selected color data signals and one black voltage based on the data state of one reference data signal, and outputs one fixed color data signal.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: August 7, 2018
    Assignee: LG Display Co., LTD
    Inventors: SeungTae Kim, Oh Kyong Kwon
  • Publication number: 20180188842
    Abstract: In the touch panel device and the operating method for the same according to the present invention, an entire scan is divided into a first scan and a second scan for determining a touch position. In the first scan, a plurality of transmission electrodes are configured into groups, and a signal is applied sequentially or simultaneously such that a first analysis position is determined. In the second scan, since a signal is sequentially or simultaneously applied only to the first analysis position, a plurality of sampling durations can sufficiently be provided such that a second analysis position, which is the exact touch position, can be determined.
    Type: Application
    Filed: July 7, 2015
    Publication date: July 5, 2018
    Applicant: Industry-University Cooperation Foundation Hanyang University
    Inventor: Oh-Kyong KWON
  • Publication number: 20180181229
    Abstract: Disclosed are a capacitance-type touch panel device and an operation method for the same. In order that the effect of disturbance noise comprised in a receiving signal is minimized, a calculation for a digital code which has been converted into a digital signal type is performed. Information about the noise level of the digital code is compared to a reference value, and, when the frequency of the noise is determined to be similar to the frequency of the receiving signal, the frequency of an operation signal, which is supplied from a signal generation unit, is changed.
    Type: Application
    Filed: July 7, 2015
    Publication date: June 28, 2018
    Applicant: Industry-University Cooperation Foundation Hanyang University
    Inventor: Oh-Kyong KWON
  • Publication number: 20180166516
    Abstract: A pixel includes first through fourth transistors and storage capacitor. The first transistor controls an amount of current flowing from a first driving power source to a second driving power source, via an organic light-emitting diode, based on a voltage of a first node. The second transistor is coupled between a first electrode of the first transistor and the first node, and is turned on when a scan signal is supplied to a scan line. The third transistor is coupled between a second electrode of the first transistor and a reference power source, and is turned on when the scan signal is supplied. The fourth transistor is coupled between an anode electrode of the organic light-emitting diode and a data line, and is turned on when the scan signal is supplied. The storage capacitor is coupled between the first node and the anode electrode of the organic light-emitting diode.
    Type: Application
    Filed: December 12, 2017
    Publication date: June 14, 2018
    Inventors: Chong Chul CHAI, Oh Kyong KWON, Nack Hyeon KEUM, Kyong Hwan OH, Bo Yong CHUNG, An Su LEE
  • Publication number: 20180082640
    Abstract: A method of driving a display device including a sensing line, a light-emitting element, a capacitor, and a driving transistor, the driving transistor comprising a control terminal that is connected to the capacitor, an input terminal, and an output terminal the method including: connecting the control terminal and the output terminal; connecting the control terminal and the output terminal to a ground voltage and then disconnecting the control terminal and the output terminal from the ground voltage; sensing a first voltage of the control terminal through the sensing line; and calculating a threshold voltage of the driving transistor based on the first voltage.
    Type: Application
    Filed: November 29, 2017
    Publication date: March 22, 2018
    Inventors: Ung-Gyu Min, Oh-Kyong Kwon
  • Publication number: 20180033377
    Abstract: A data driver capable of displaying images with a substantially uniform brightness, an organic light emitting display device using the same, and a method of driving the organic light emitting display device. The data driver includes a plurality of current sink units for controlling predetermined currents to flow through data lines, a plurality of voltage generators for resetting values of gray scale voltages using compensation voltages generated when the predetermined currents flow, a plurality of digital-to-analog converters for selecting one gray scale voltage among the gray scale voltages as a data signal in response to bit values of the data supplied from the outside, and a plurality of switching units for supplying the data signal to the data lines. The predetermined currents may be set equal to pixel currents that correspond to a maximum brightness.
    Type: Application
    Filed: October 12, 2017
    Publication date: February 1, 2018
    Inventors: Do Hyung Ryu, Bo Yong Chung, Hong Kwon Kim, Oh Kyong Kwon