Patents by Inventor Oh Jo Kwon

Oh Jo 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: 20250265972
    Abstract: A display device includes a data driver for supplying a reference voltage and a plurality of data signals to each of output lines, a divider including demultiplexers for supplying the reference voltage and the plurality of data signals, which are supplied from the each of the output lines, to a plurality of data lines, corresponding to control signals, a timing controller for supplying the control signals, and pixels connected to scan lines and the data lines. The pixels located on at least two different horizontal lines are simultaneously supplied with the reference voltage.
    Type: Application
    Filed: December 11, 2024
    Publication date: August 21, 2025
    Applicant: Samsung Display Co., LTD.
    Inventors: Seong Joo LEE, Oh Jo KWON, Jae Sang KIM
  • Patent number: 12394366
    Abstract: According to embodiments of the disclosure, a pixel includes a driving transistor including a gate electrode, a first electrode electrically connected to a first power line and a second electrode electrically connected to a light emitting element, a body of a semiconductive layer constituting the driving transistor being electrically connected to the first power line.
    Type: Grant
    Filed: February 29, 2024
    Date of Patent: August 19, 2025
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sang Hyun Heo, Joon Chul Goh, Oh Jo Kwon, Dong Soo Kim, Hyung Gun Ma, Jung Hun Yi
  • Patent number: 12260800
    Abstract: A pixel may include: a first transistor including a second electrode, a first electrode electrically connected to a first power line, and a gate electrode connected to a first node; a second transistor including a second electrode, a first electrode electrically connected to a data line, and a gate electrode electrically connected to a first scan line; a third transistor connected between the first node and the data line, and including a gate electrode electrically connected to a second scan line; a first capacitor including a first electrode connected to the second electrode of the second transistor, and a second electrode connected to the first node; a second capacitor connected between the first power line and the first node; and a light emitting element between a second power line and the first transistor, and including a second electrode electrically connected to the second power line.
    Type: Grant
    Filed: March 20, 2024
    Date of Patent: March 25, 2025
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sang Hyun Heo, Joon Chul Goh, Oh Jo Kwon, Dong Soo Kim, Hyung Gun Ma, Jung Hun Yi
  • Publication number: 20250006097
    Abstract: A pixel may include: a first transistor including a second electrode, a first electrode electrically connected to a first power line, and a gate electrode connected to a first node; a second transistor including a second electrode, a first electrode electrically connected to a data line, and a gate electrode electrically connected to a first scan line; a third transistor connected between the first node and the data line, and including a gate electrode electrically connected to a second scan line; a first capacitor including a first electrode connected to the second electrode of the second transistor, and a second electrode connected to the first node; a second capacitor connected between the first power line and the first node; and a light emitting element between a second power line and the first transistor, and including a second electrode electrically connected to the second power line.
    Type: Application
    Filed: March 20, 2024
    Publication date: January 2, 2025
    Inventors: Sang Hyun HEO, Joon Chul GOH, Oh Jo KWON, Dong Soo KIM, Hyung Gun MA, Jung Hun YI
  • Publication number: 20240395192
    Abstract: According to embodiments of the disclosure, a pixel includes a driving transistor including a gate electrode, a first electrode electrically connected to a first power line and a second electrode electrically connected to a light emitting element, a body of a semiconductive layer constituting the driving transistor being electrically connected to the first power line.
    Type: Application
    Filed: February 29, 2024
    Publication date: November 28, 2024
    Inventors: Sang Hyun HEO, Joon Chul GOH, Oh Jo KWON, Dong Soo KIM, Hyung Gun MA, Jung Hun YI
  • Patent number: 12130987
    Abstract: A sensor device including: first sensors; second sensors configured to form capacitances with the first sensors; a sensor transmitter connected to the first sensors and configured to supply driving signals having a first frequency to the first sensors; and a sensor receiver connected to the second sensors and configured to receive sensing signals from the second sensors, wherein the sensor receiver includes: a multipath filter having a center frequency set to the first frequency; and a first chopper integrator connected to the multipath filter, and having a center frequency set to the first frequency.
    Type: Grant
    Filed: December 6, 2022
    Date of Patent: October 29, 2024
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Keum Dong Jung, Oh Jo Kwon, Ji Woong Kim, Hyung Gun Ma, Seong An Park, Sang Hyun Heo
  • Publication number: 20240241598
    Abstract: A touch detection device supplies driving signals generated based on orthogonal carriers and a CDMA scheme to driving electrodes. A touch driving circuit drives the driving electrodes in groups including a first group and a second group, supplies first driving signals based on a designated first frequency and first orthogonal codes set to correspond to the driving electrodes of the first group, respectively, to the driving electrodes of the first group, and supplies second multiple driving signals based on a second frequency orthogonal to the first frequency and second orthogonal codes set to correspond to the driving electrodes of the second group, respectively, to the driving electrodes of the second group.
    Type: Application
    Filed: September 19, 2023
    Publication date: July 18, 2024
    Inventors: Ji Woong KIM, Kang Yoon LEE, Oh Jo KWON, Dong Gyu KIM, Chang Hyeon KIM
  • Patent number: 11947764
    Abstract: An input sensing unit includes a touch sensing unit, which includes a plurality of driving electrodes, a plurality of sensing electrodes, and a driving signal generating unit which provides driving signals to the driving electrodes. The sensing electrodes are insulated from and intersect the driving electrodes. The driving signal generating unit includes touch drivers connected to driving electrodes and a digital-to-analog converter configured to provide a first signal or a second signal, and each of the touch drivers is connected to a preset number of driving electrodes among the driving electrodes.
    Type: Grant
    Filed: May 23, 2022
    Date of Patent: April 2, 2024
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ji Woong Kim, Oh Jo Kwon, Kyung Tea Park, Keum Dong Jung, Sang Hyun Heo
  • Patent number: 11908422
    Abstract: A digital-analog converter of the disclosure converts digital image data to generate analog data signals. The digital-analog converter includes a voltage divider which generates a plurality of gamma reference voltages based on a first reference voltage and a second reference voltage; a global ramp including a plurality of gamma decoders which generates a plurality of global gamma voltages based on the gamma reference voltages; a decoder which selects one of the global gamma voltages according to the digital image data to generate the analog data signals; and a ramp controller which turns off at least some of the gamma decoders based on the digital image data.
    Type: Grant
    Filed: November 14, 2022
    Date of Patent: February 20, 2024
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hyung Gun Ma, Oh Jo Kwon, Ji Woong Kim, Jun Yong Song, Seong Joo Lee, Sang Hyun Heo
  • Patent number: 11900870
    Abstract: A display device includes: a display panel including a plurality of pixels; a scan driver connected to the plurality of pixels through a plurality of scan lines; a data driver connected to the plurality of pixels through a plurality of data lines; an emission driver connected to the plurality of pixels through a plurality of emission control lines; a sensing circuit connected to the plurality of pixels through a plurality of sensing lines; and a controller configured to control the scan driver, the data driver, the emission driver and the sensing circuit, wherein, in an active period of each frame period, the scan driver sequentially applies a sensing pulse and a scan pulse to at least one scan line of the plurality of scan lines, and applies the scan pulse to remaining scan lines of the plurality of scan lines.
    Type: Grant
    Filed: October 25, 2021
    Date of Patent: February 13, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hyungryul Kang, Oh Jo Kwon, Yoshimura Hideo, Bong-Hyun You, Jaekeun Lim
  • Patent number: 11837132
    Abstract: An output buffer is disclosed that includes: a buffer circuit that outputs an output signal to an output terminal based on a first input signal provided to a first input terminal and a second input signal provided to a second input terminal; and a current supply circuit that is connected in parallel to the buffer circuit, and provides an auxiliary current to the output terminal based on the first input signal and the second input signal.
    Type: Grant
    Filed: October 13, 2021
    Date of Patent: December 5, 2023
    Assignees: Samsung Display Co., Ltd., Korea Advanced Institute of Science and Technology
    Inventors: Seong Joo Lee, Seok Tae Koh, Gyeong Gu Kang, Oh Jo Kwon, Hyun Sik Kim, Gyu Wan Lim, Keum Dong Jung
  • Publication number: 20230305657
    Abstract: A sensor device including: first sensors; second sensors configured to form capacitances with the first sensors; a sensor transmitter connected to the first sensors and configured to supply driving signals having a first frequency to the first sensors; and a sensor receiver connected to the second sensors and configured to receive sensing signals from the second sensors, wherein the sensor receiver includes: a multipath filter having a center frequency set to the first frequency; and a first chopper integrator connected to the multipath filter, and having a center frequency set to the first frequency.
    Type: Application
    Filed: December 6, 2022
    Publication date: September 28, 2023
    Inventors: Keum Dong JUNG, Oh Jo Kwon, Ji Woong Kim, Hyung Gun Ma, Seong An Park, Sang Hyun Heo
  • Patent number: 11705046
    Abstract: A data driver includes a multi-channel sample/hold circuit electrically connected between a digital-to-analog converter and a data buffer. The multi-channel sample/hold circuit includes a first sample/hold circuit connected to a first channel and a second sample/hold circuit connected to a second channel. The first sample/hold circuit performs a first drive operation and a second drive operation. The first drive operation includes sampling a data voltage as a buffer input voltage and maintaining the buffer input voltage during an nth horizontal time. The second drive operation includes outputting the buffer input voltage to an output terminal of the buffer during an (n+1)th horizontal time. The second sample/hold circuit performs the second drive operation during the nth horizontal time and performs the first drive operation during the (n+1)th horizontal time.
    Type: Grant
    Filed: September 10, 2021
    Date of Patent: July 18, 2023
    Assignees: SAMSUNG DISPLAY CO., LTD., KOREA UNIVERSITY RESEARCH & BUSINESS FOUNDATION
    Inventors: Young Soo Hwang, Joon Chul Goh, Oh Jo Kwon, Ki Duk Kim, Jeong Min Kim, Bong Hyun You, Hyung Min Lee, Seung Hun Choi
  • Publication number: 20230073395
    Abstract: A digital-analog converter of the disclosure converts digital image data to generate analog data signals. The digital-analog converter includes a voltage divider which generates a plurality of gamma reference voltages based on a first reference voltage and a second reference voltage; a global ramp including a plurality of gamma decoders which generates a plurality of global gamma voltages based on the gamma reference voltages; a decoder which selects one of the global gamma voltages according to the digital image data to generate the analog data signals; and a ramp controller which turns off at least some of the gamma decoders based on the digital image data.
    Type: Application
    Filed: November 14, 2022
    Publication date: March 9, 2023
    Inventors: Hyung Gun MA, Oh Jo KWON, Ji Woong KIM, Jun Yong SONG, Seong Joo LEE, Sang Hyun HEO
  • Publication number: 20230051918
    Abstract: An input sensing unit includes a touch sensing unit, which includes a plurality of driving electrodes, a plurality of sensing electrodes, and a driving signal generating unit which provides driving signals to the driving electrodes. The sensing electrodes are insulated from and intersect the driving electrodes. The driving signal generating, unit includes touch drivers connected to driving electrodes and a digital-to-analog converter configured to provide a first signal or a second signal, and each of the touch drivers is connected to a preset number of driving electrodes among the driving electrodes.
    Type: Application
    Filed: May 23, 2022
    Publication date: February 16, 2023
    Inventors: Ji Woong KIM, Oh Jo KWON, Kyung Tea PARK, Keum Dong JUNG, Sang Hyun HEO
  • Patent number: 11508290
    Abstract: A pixel according to some embodiments includes a light source unit, a first transistor coupled between a first power source and a first node, and configured to control a driving current applied to the light source unit, a first bias transistor coupled between a first bias power source and a gate electrode of the first transistor, and a second bias transistor coupled between a second bias power source and a second node that is electrically coupled to an anode of the light source unit, wherein the first bias transistor and the second bias transistor are configured to be turned on during a first period before a data voltage is applied among one frame, and wherein the second bias transistor is configured to be turned on at least once during a second period after the data voltage is applied among the one frame.
    Type: Grant
    Filed: May 24, 2021
    Date of Patent: November 22, 2022
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yun Ki Baek, Oh Jo Kwon, Bong Hyun You, Seok Ha Hong
  • Patent number: 11501718
    Abstract: A digital-analog converter of the disclosure converts digital image data to generate analog data signals. The digital-analog converter includes a voltage divider which generates a plurality of gamma reference voltages based on a first reference voltage and a second reference voltage; a global ramp including a plurality of gamma decoders which generates a plurality of global gamma voltages based on the gamma reference voltages; a decoder which selects one of the global gamma voltages according to the digital image data to generate the analog data signals; and a ramp controller which turns off at least some of the gamma decoders based on the digital image data.
    Type: Grant
    Filed: February 3, 2021
    Date of Patent: November 15, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hyung Gun Ma, Oh Jo Kwon, Ji Woong Kim, Jun Yong Song, Seong Joo Lee, Sang Hyun Heo
  • Publication number: 20220335871
    Abstract: An output buffer is disclosed that includes: a buffer circuit that outputs an output signal to an output terminal based on a first input signal provided to a first input terminal and a second input signal provided to a second input terminal; and a current supply circuit that is connected in parallel to the buffer circuit, and provides an auxiliary current to the output terminal based on the first input signal and the second input signal.
    Type: Application
    Filed: October 13, 2021
    Publication date: October 20, 2022
    Inventors: Seong Joo LEE, Seok Tae KOH, Gyeong Gu KANG, Oh Jo KWON, Hyun Sik KIM, Gyu Wan LIM, Keum Dong JUNG
  • Patent number: 11322096
    Abstract: A data driver includes: a signal generator which includes a staircase waveform gray voltage signal generator which generate a plurality of staircase waveform gray voltage signals using a lowest gamma reference voltage, a highest gamma reference voltage, and a plurality of gamma voltages having a magnitude between the lowest gamma reference voltage and the highest gamma reference voltage; and a channel driver which includes a decoder which output one staircase waveform gray voltage signal selected from the staircase waveform gray voltage signals, an output circuit which output a gray voltage corresponding to the selected staircase waveform gray voltage signal, and a reset unit which supplies one of the gamma voltages to the output circuit as a reset voltage.
    Type: Grant
    Filed: March 10, 2021
    Date of Patent: May 3, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Seong Joo Lee, Oh Jo Kwon, Ji Woong Kim, Hyung Gun Ma, Jun Yong Song, Sang Hyun Heo
  • Publication number: 20220122513
    Abstract: A data driver includes a multi-channel sample/hold circuit electrically connected between a digital-to-analog converter and a data buffer. The multi-channel sample/hold circuit includes a first sample/hold circuit connected to a first channel and a second sample/hold circuit connected to a second channel. The first sample/hold circuit performs a first drive operation and a second drive operation. The first drive operation includes sampling a data voltage as a buffer input voltage and maintaining the buffer input voltage during an nth horizontal time. The second drive operation includes outputting the buffer input voltage to an output terminal of the buffer during an (n+1)th horizontal time. The second sample/hold circuit performs the second drive operation during the nth horizontal time and performs the first drive operation during the (n+1)th horizontal time.
    Type: Application
    Filed: September 10, 2021
    Publication date: April 21, 2022
    Inventors: YOUNG SOO HWANG, Joon Chul Goh, Oh Jo Kwon, Ki Duk Kim, Jeong Min Kim, Bong Hyun You, Hyung Min Lee, Seung Hun Choi