Patents by Inventor Joung Mi CHOI

Joung Mi CHOI 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: 20250089478
    Abstract: A display panel may include a substrate, a first light emitting transistor and a driving transistor formed over the substrate, an interlayer insulating film formed to cover the first light emitting transistor and the driving transistor, a first planarization layer formed on the interlayer insulating film, a link line formed on the first planarization layer and electrically connected to the first light emitting transistor through the first planarization layer and the interlayer insulating film, a second planarization layer formed to cover the link line, and a light emitting element formed on the second planarization layer, in which a cathode electrode is electrically connected to the link line through a drilling area.
    Type: Application
    Filed: June 26, 2024
    Publication date: March 13, 2025
    Applicant: LG Display Co., Ltd.
    Inventors: Ji Ah KIM, Joung Mi Choi
  • Publication number: 20250087157
    Abstract: A subpixel circuit and a display device including the subpixel circuit are discussed. The subpixel circuit in one example includes a light emitting element configured to receive a high-potential driving voltage at an anode electrode, and a driving transistor including a first node, a second node, and a third node. The subpixel circuit further includes a scan transistor controlled by a first scan signal and transmitting a data voltage through a data line, a storage capacitor, and a control circuit configured to control operations of the driving transistor, the scan transistor, and the storage capacitor. The control circuit can be located between a cathode electrode of the light emitting element and a low-potential base voltage line.
    Type: Application
    Filed: July 30, 2024
    Publication date: March 13, 2025
    Applicant: LG Display Co., Ltd.
    Inventors: Ji Ah KIM, Joung Mi CHOI
  • Patent number: 12230209
    Abstract: Embodiments disclose a display device including a display panel including a first display region having a plurality of first pixels, and a second display region having a plurality of second pixels and a plurality of light-transmitting regions, a plurality of data lines through which data signals of the plurality of first pixels and the plurality of second pixels are output, a plurality of gate lines through which gate signals of the plurality of first pixels and the plurality of second pixels are output, and a gate driving unit including a plurality of stages configured to output the gate signals to the plurality of gate lines and a dummy stage connected in parallel to at least one of the plurality of stages.
    Type: Grant
    Filed: December 7, 2023
    Date of Patent: February 18, 2025
    Assignee: LG Display Co., Ltd.
    Inventors: Ji Ah Kim, Joung Mi Choi
  • Publication number: 20240431158
    Abstract: A display panel and a display device including the same are disclosed. The display panel includes a pixel array on which an input image is displayed; and a bezel area outside the pixel array. The pixel array includes a pixel circuit area in which a plurality of pixel circuits connected to data lines, gate lines, and power lines are disposed; and a gate driving circuit area in which a gate driver supplying a gate signal to the gate line is disposed. A light emitting area of a light emitting element driven by the pixel circuits is disposed in the pixel circuit area and the gate driving circuit area. The power line is disposed below an anode electrode of the light emitting element.
    Type: Application
    Filed: June 20, 2023
    Publication date: December 26, 2024
    Inventors: Joung Mi Choi, Eui Hyun Chung, Ji Ah Kim
  • Patent number: 12048226
    Abstract: Disclosed herein are a display device and a mobile terminal device including the same, which include a display panel including a screen in which a plurality of display pixels which are sequentially scanned, and a plurality of sensor pixels which are exposed to a light during an exposure time to convert the light into an electric current are disposed. While the display pixels disposed in the first area of the screen are scanned, the sensor pixels are exposed. While the display pixels in the second area of the screen are scanned, sensor data is output from the sensor pixels and then the sensor pixels are initialized.
    Type: Grant
    Filed: July 20, 2021
    Date of Patent: July 23, 2024
    Assignee: LG Display Co., Ltd.
    Inventors: Dong Gun Lee, Joung Mi Choi, Man Hyeop Han
  • Publication number: 20240221656
    Abstract: A display device can include a first display region including a plurality of first pixels, a second display region including a plurality of second pixels, and a boundary region disposed between the first display region and the second display region. The boundary region includes the plurality of first pixels and the plurality of second pixels. Also, the plurality of first pixels respectively include a plurality of first pixel circuits, the plurality of second pixels respectively include a plurality of second pixel circuits, and a transmittance of each of the plurality of second pixel circuits is higher than a transmittance of each of the plurality of first pixel circuits.
    Type: Application
    Filed: November 27, 2023
    Publication date: July 4, 2024
    Applicant: LG Display Co., Ltd.
    Inventors: Ji Ah KIM, Bo Gun SEO, Joung Mi CHOI
  • Publication number: 20240221660
    Abstract: Embodiments disclose a display device including a display panel including a first display region having a plurality of first pixels, and a second display region having a plurality of second pixels and a plurality of light-transmitting regions, a plurality of data lines through which data signals of the plurality of first pixels and the plurality of second pixels are output, a plurality of gate lines through which gate signals of the plurality of first pixels and the plurality of second pixels are output, and a gate driving unit including a plurality of stages configured to output the gate signals to the plurality of gate lines and a dummy stage connected in parallel to at least one of the plurality of stages.
    Type: Application
    Filed: December 7, 2023
    Publication date: July 4, 2024
    Inventors: Ji Ah KIM, Joung Mi CHOI
  • Publication number: 20240192797
    Abstract: A display panel includes a first pixel area in which a plurality of light emitting elements and a plurality of pixel circuit are disposed, and a second pixel area in which a plurality of light emitting elements are disposed, and the second pixel area further may include a plurality of transparent extension lines configured to electrically connect the plurality of light emitting elements disposed in the second pixel area to the plurality of pixel circuits disposed in the first pixel area.
    Type: Application
    Filed: June 14, 2023
    Publication date: June 13, 2024
    Applicant: LG Display Co., Ltd.
    Inventors: Seung Taek OH, Joung Mi CHOI, Dong Gun LEE
  • Patent number: 11861930
    Abstract: The present disclosure relates to a display panel and a display device using the same. The display panel includes a plurality of first unit pixel areas in which N subpixels (N is a positive integer greater than or equal to 3) for displaying data are disposed, and a plurality of second unit pixel areas in which N?1 subpixels for displaying data are disposed. Each of the first unit pixel areas and each of the second unit pixel areas have the same size. Each of the first and second unit pixel areas is a pixel area in a parallelogram or rhombus shape.
    Type: Grant
    Filed: August 9, 2021
    Date of Patent: January 2, 2024
    Assignee: LG Display Co., Ltd.
    Inventors: Man Hyeop Han, Joung Mi Choi, Seung Taek Oh
  • Patent number: 11790687
    Abstract: A display device and a mobile terminal including the same includes a display area in which a first group of display pixels to which pixel data is written are arranged, and a sensing area in which a second group of display pixels and a plurality of sensor pixels are arranged; each of the display pixels includes a pixel circuit configured to drive a light emitting element; each of the sensor pixels includes a photosensor driving circuit configured to drive a photodiode; a low potential power voltage and a pixel driving voltage are applied to the pixel circuit and the photosensor driving circuit; a cathode electrode of the light emitting element and the cathode electrode of the photodiode share the same metal electrode, and are commonly connected to a low potential power line to which the low potential power voltage is applied.
    Type: Grant
    Filed: June 28, 2021
    Date of Patent: October 17, 2023
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Man Hyeop Han, Joung Mi Choi, Dong Gun Lee
  • Publication number: 20220075979
    Abstract: The present disclosure relates to a display panel and a display device using the same. The display panel includes a plurality of first unit pixel areas in which N subpixels (N is a positive integer greater than or equal to 3) for displaying data are disposed, and a plurality of second unit pixel areas in which N?1 subpixels for displaying data are disposed. Each of the first unit pixel areas and each of the second unit pixel areas have the same size. Each of the first and second unit pixel areas is a pixel area in a parallelogram or rhombus shape.
    Type: Application
    Filed: August 9, 2021
    Publication date: March 10, 2022
    Inventors: Man Hyeop Han, Joung Mi Choi, Seung Taek Oh
  • Publication number: 20220037430
    Abstract: Disclosed herein are a display device and a mobile terminal device including the same, which include a display panel including a screen in which a plurality of display pixels which are sequentially scanned, and a plurality of sensor pixels which are exposed to a light during an exposure time to convert the light into an electric current are disposed. While the display pixels disposed in the first area of the screen are scanned, the sensor pixels are exposed. While the display pixels in the second area of the screen are scanned, sensor data is output from the sensor pixels and then the sensor pixels are initialized.
    Type: Application
    Filed: July 20, 2021
    Publication date: February 3, 2022
    Inventors: Dong Gun Lee, Joung Mi Choi, Man Hyeop Han
  • Publication number: 20220019757
    Abstract: A display device and a mobile terminal including the same includes a display area in which a first group of display pixels to which pixel data is written are arranged, and a sensing area in which a second group of display pixels and a plurality of sensor pixels are arranged; each of the display pixels includes a pixel circuit configured to drive a light emitting element; each of the sensor pixels includes a photosensor driving circuit configured to drive a photodiode; a low potential power voltage and a pixel driving voltage are applied to the pixel circuit and the photosensor driving circuit; a cathode electrode of the light emitting element and the cathode electrode of the photodiode share the same metal electrode, and are commonly connected to a low potential power line to which the low potential power voltage is applied.
    Type: Application
    Filed: June 28, 2021
    Publication date: January 20, 2022
    Applicant: LG Display Co., Ltd.
    Inventors: Man Hyeop HAN, Joung Mi CHOI, Dong Gun LEE
  • Patent number: 10115366
    Abstract: An LCD device can include a liquid crystal display panel having a plurality of gate lines; a controller configured to generate at least four clock signals with different phases; a first gate driver configured to apply a high gate voltage to odd-numbered gate lines in response to at least two of the clock signals; a second gate driver configured to apply the high gate voltage to even-numbered gate lines in response to other clock signals; primary discharge circuits each configured to apply a low gate voltage to the respective odd-numbered gate line in response to a carry signal opposite to a voltage level on one of posterior odd-and-even-numbered gate lines; and secondary discharge circuits each configured to apply the low gate voltage to the respective even-numbered gate line in response to the carry signal opposite to the voltage level on the other one of the posterior odd-and-even-numbered gate lines.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: October 30, 2018
    Assignee: LG DISPLAY CO., LTD.
    Inventor: Joung Mi Choi
  • Patent number: 9620240
    Abstract: Disclosed is a shift register including stages for sequentially outputting output pulses including carry and scan pulses. Odd-numbered stages supply corresponding scan pulses to odd-numbered gate lines in a sequential manner, and even-numbered stages supply corresponding scan pulses to even-numbered gate lines in a sequential manner. Each stage includes a carry output unit for generating a carry pulse, based on a first discharge voltage and a clock pulse having a low-level voltage equal to the first discharge voltage, and supplying the carry pulse to at least one of upstream and downstream stages, and a scan output unit for generating a scan pulse, based on a second discharge voltage having a higher voltage than the first discharge voltage and the clock pulse, and supplying the scan pulse to a corresponding gate line.
    Type: Grant
    Filed: May 29, 2014
    Date of Patent: April 11, 2017
    Assignee: LG Display Co., Ltd.
    Inventors: Byeong-Seong So, Joung-Mi Choi
  • Publication number: 20150340003
    Abstract: An LCD device can include a liquid crystal display panel having a plurality of gate lines; a controller configured to generate at least four clock signals with different phases; a first gate driver configured to apply a high gate voltage to odd-numbered gate lines in response to at least two of the clock signals; a second gate driver configured to apply the high gate voltage to even-numbered gate lines in response to other clock signals; primary discharge circuits each configured to apply a low gate voltage to the respective odd-numbered gate line in response to a carry signal opposite to a voltage level on one of posterior odd-and-even-numbered gate lines; and secondary discharge circuits each configured to apply the low gate voltage to the respective even-numbered gate line in response to the carry signal opposite to the voltage level on the other one of the posterior odd-and-even-numbered gate lines.
    Type: Application
    Filed: August 4, 2015
    Publication date: November 26, 2015
    Applicant: LG DISPLAY CO., LTD.
    Inventor: Joung Mi CHOI
  • Patent number: 9123310
    Abstract: An LCD device according to an embodiment includes a liquid crystal display panel in which n gate lines are formed; a timing controller to generate first to sixth clock signals; a first gate driver to apply a high gate voltage to one ends of the (2k?1)th gate lines in response to the first, third and fifth clock signals; a second gate driver to apply the high gate voltage to one ends of the (2k)th gate lines in response to the second, fourth and sixth clock signals; left discharge circuits each to apply a low gate voltage to the other end of the (2k?1)th gate line according to a voltage level on (2k+1)th gate line; and right discharge circuits each to apply the low gate voltage to the other end of the (2k)th gate line according to the voltage level on (2k+2)th gate line.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: September 1, 2015
    Assignee: LG DISPLAY CO., LTD.
    Inventor: Joung Mi Choi
  • Patent number: 8976106
    Abstract: An LCD panel being driven in an overlapping drive mode by applying a gate high voltage during n horizontal synchronous intervals is disclosed. The LCD panel includes: a plurality of gate lines; and a gate driver configured to include a plurality of stages connected to the plurality of gate lines. The plurality of stages are grouped in a plurality of stage groups each including n stages. Odd-numbered stage groups each allows the n stages to be arranged in a Z shape with having a display area therebetween. Even-number stage groups each allows the n states to be arranged in an inverse-Z shape with having the display area therebetween.
    Type: Grant
    Filed: October 2, 2013
    Date of Patent: March 10, 2015
    Assignee: LG Display Co., Ltd.
    Inventors: Byeong Seong So, Joung Mi Choi
  • Publication number: 20140354523
    Abstract: Disclosed is a shift register including stages for sequentially outputting output pulses including carry and scan pulses. Odd-numbered stages supply corresponding scan pulses to odd-numbered gate lines in a sequential manner, and even-numbered stages supply corresponding scan pulses to even-numbered gate lines in a sequential manner. Each stage includes a carry output unit for generating a carry pulse, based on a first discharge voltage and a clock pulse having a low-level voltage equal to the first discharge voltage, and supplying the carry pulse to at least one of upstream and downstream stages, and a scan output unit for generating a scan pulse, based on a second discharge voltage having a higher voltage than the first discharge voltage and the clock pulse, and supplying the scan pulse to a corresponding gate line.
    Type: Application
    Filed: May 29, 2014
    Publication date: December 4, 2014
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Byeong-Seong SO, Joung-Mi CHOI
  • Publication number: 20140118327
    Abstract: An LCD panel being driven in an overlapping drive mode by applying a gate high voltage during n horizontal synchronous intervals is disclosed. The LCD panel includes: a plurality of gate lines; and a gate driver configured to include a plurality of stages connected to the plurality of gate lines. The plurality of stages are grouped in a plurality of stage groups each including n stages. Odd-numbered stage groups each allows the n stages to be arranged in a Z shape with having a display area therebetween. Even-number stage groups each allows the n states to be arranged in an inverse-Z shape with having the display area therebetween.
    Type: Application
    Filed: October 2, 2013
    Publication date: May 1, 2014
    Applicant: LG Display Co., Ltd.
    Inventors: Byeong Seong SO, Joung Mi CHOI