Patents by Inventor Ji CHA

Ji CHA 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).

  • Patent number: 12315439
    Abstract: A stage including: an output circuit connected to a first node and a second node; an input connected to a third node and a fourth node; and a plurality of signal processors between the output and the input, the plurality of signal processors electrically connecting the first node and the third node and electrically connecting the second node and the fourth node, wherein the input includes: a seventh transistor connected between a first input terminal and the fourth node and having a gate electrode connected to a second input terminal; a plurality of eighth transistors serially connected between the third node and the second input terminal and having gate electrodes connected to the fourth node; and a ninth transistor connected between the third node and a second power source and having a gate electrode connected to the second input terminal.
    Type: Grant
    Filed: April 28, 2023
    Date of Patent: May 27, 2025
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Seung Kyu Lee, Seung Ji Cha, Ji Hyun Ka, Tae Hoon Kwon, Min Ku Lee, Jin Tae Jeong
  • Publication number: 20250166550
    Abstract: A display device includes a display panel including a sub-pixel, and a display panel driver for driving the display panel. The sub-pixel includes a driving transistor, a storage capacitor connected to a control electrode of the driving transistor, a write transistor writing a data voltage to the storage capacitor in response to a write gate signal, a first emission transistor providing a first power voltage to a first electrode of the driving transistor in response to a first emission signal, a hold capacitor including a first electrode receiving the first power voltage and a second electrode connected to a second electrode of the driving transistor, and a light emitting element emitting light. The first emission signal has an active level in a first portion of each of first periods of one frame, and has the active level in each of second periods respectively subsequent to the first periods.
    Type: Application
    Filed: October 8, 2024
    Publication date: May 22, 2025
    Inventors: Jong Sik SHIM, Sang Myoung LEE, Dae Seop KIM, Tae Hoon KIM, Seung Hwan CHEONG, Seung Ji CHA
  • Publication number: 20250160161
    Abstract: An organic light-emitting display device includes: a substrate on which a display area and a non-display area surrounding the display area are defined, the display area includes a main area and at least one protruding area, and a plurality of pixels is in the display area; a first signal line on the substrate in the main area to provide signals to the plurality of pixels; a second signal line on the substrate in the protruding area to provide signals to the plurality of pixels; a compensation line on the substrate in the non-display area and electrically connected to the second signal line; and a bridge pattern over the second signal line and the compensation line in the non-display area and electrically connecting the second signal line with the compensation line, the bridge pattern including a double-bridge structure.
    Type: Application
    Filed: January 16, 2025
    Publication date: May 15, 2025
    Inventors: Ji Hyun Ka, Seung Ji Cha, Tae Hoon Kwon
  • Patent number: 12254803
    Abstract: A display device is provided. The display device comprises a display panel including a plurality of signal pads and one or more dummy pads, and at least one flexible wiring board providing signals to the signal pads, wherein a maximum bias period of signals provided to a pair of adjacent signal pads with at least one dummy pad interposed therebetween is longer than a maximum bias period of signals provided to a pair of adjacent signal pads with no dummy pad disposed therebetween.
    Type: Grant
    Filed: July 6, 2023
    Date of Patent: March 18, 2025
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Tae Hoon Kwon, Ji Hyun Ka, Byung Sun Kim, Yang Wan Kim, Hyung Jun Park, Su Jin Lee, Jae Yong Lee, Jin Tae Jeong, Seung Ji Cha
  • Patent number: 12238994
    Abstract: An organic light-emitting display device includes: a substrate on which a display area and a non-display area surrounding the display area are defined, the display area includes a main area and at least one protruding area, and a plurality of pixels is in the display area; a first signal line on the substrate in the main area to provide signals to the plurality of pixels; a second signal line on the substrate in the protruding area to provide signals to the plurality of pixels; a compensation line on the substrate in the non-display area and electrically connected to the second signal line; and a bridge pattern over the second signal line and the compensation line in the non-display area and electrically connecting the second signal line with the compensation line, the bridge pattern including a double-bridge structure.
    Type: Grant
    Filed: March 10, 2023
    Date of Patent: February 25, 2025
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ji Hyun Ka, Seung Ji Cha, Tae Hoon Kwon
  • Patent number: 12223911
    Abstract: A pixel includes an organic light emitting diode (OLED), a pixel circuit, and first and second transistors. The OLD includes a cathode electrode connected to a second power source. The pixel circuit includes a driving transistor having a gate electrode initialized by a third power source. The driving transistor controls the amount of current flowing from a first power source to the second power source via the OLED. The first transistor is connected between a fourth power source and the second power source and an anode electrode of the OLED. The first transistor is turned on based on a scan signal is supplied to a scan line. The second transistor is connected between a data line and the pixel circuit. The second transistor is turned on when the scan signal is supplied to the ith scan line.
    Type: Grant
    Filed: February 29, 2024
    Date of Patent: February 11, 2025
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jin Tae Jeong, Min Ku Lee, Ji Hyun Ka, Tae Hoon Kwon, Seung Kyu Lee, Seung Ji Cha
  • Patent number: 12166230
    Abstract: Disclosed is a secondary battery, which has a reinforced strength and can simplify the manufacturing process thereof. For example, one embodiment provides a secondary battery which comprises: an electrode assembly including a first electrode plate and a second electrode plate, wherein one of the first electrode plate and the second electrode plate includes a plurality of first tabs formed to protrude in one direction; a first current collection tab coupled to the first tabs; a case housing the electrode assembly; and a cap assembly coupled to the upper part of the case, wherein the first current collection tab is coupled to one of the cap assembly and the bottom surface of the case.
    Type: Grant
    Filed: October 8, 2018
    Date of Patent: December 10, 2024
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Hyun Ki Jeong, Ho Jae Lee, Jung Hyun Park, June Hyoung Park, Sang Mi Lee, Won Ik Lee, Ye Ji Cha, Nobuyuki Oyagi
  • Patent number: 12080223
    Abstract: An emissive display device includes: a light emitting diode; an n-type driving transistor comprising a first driving gate electrode, a first electrode receiving a driving voltage, a second electrode transferring an output current to the anode, and a second driving gate electrode; a second transistor connected to a data line; a third transistor configured to connect the first electrode and the first driving gate electrode of the driving transistor; a storage capacitor comprising a first storage electrode and a second storage electrode connected to the first driving gate electrode; a ninth transistor transferring an overlapping electrode voltage to the second driving gate electrode; an overlapping electrode voltage line crossing the data line and receiving the overlapping electrode voltage; and a shielding electrode at an intersection of the data line and the overlapping electrode voltage line and between the data line and the overlapping electrode voltage line.
    Type: Grant
    Filed: February 16, 2023
    Date of Patent: September 3, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Minku Lee, Ji-Hyun Ka, Chul Kyu Kang, Seunghee Lee, Hai-Jung In, Hyeongjun Jin, Hyun Ji Cha
  • Publication number: 20240237447
    Abstract: A display device comprising: first and second pixels; a first data line connected to the first pixel and configured to have data voltages applied thereto; and a second data line connected to the second pixel, the second data line being adjacent to the first data line, and configured to have the data voltages applied thereto, wherein the first data line includes a 1A-th data line which is in a first data layer, and the second data line includes a 2B-th data line which is in a second data layer different from the first data layer.
    Type: Application
    Filed: March 26, 2024
    Publication date: July 11, 2024
    Inventors: Hyun Ji CHA, Yun Kyeong IN, Young Soo YOON, Min Hee CHOI
  • Publication number: 20240203355
    Abstract: A pixel includes an organic light emitting diode (OLED), a pixel circuit, and first and second transistors. The OLD includes a cathode electrode connected to a second power source. The pixel circuit includes a driving transistor having a gate electrode initialized by a third power source. The driving transistor controls the amount of current flowing from a first power source to the second power source via the OLED. The first transistor is connected between a fourth power source and the second power source and an anode electrode of the OLED. The first transistor is turned on based on a scan signal is supplied to a scan line. The second transistor is connected between a data line and the pixel circuit. The second transistor is turned on when the scan signal is supplied to the ith scan line.
    Type: Application
    Filed: February 29, 2024
    Publication date: June 20, 2024
    Inventors: JIN TAE JEONG, MIN KU LEE, JI HYUN KA, TAE HOON KWON, SEUNG KYU LEE, SEUNG JI CHA
  • Publication number: 20240203356
    Abstract: A display device includes: a first pixel including a first organic light emitting diode; an initialization voltage generator for generating a first initialization voltage to be supplied to an anode of the first organic light emitting diode; and a timing controller including a first lookup table in which a plurality of first initialization voltage values corresponding to a plurality of maximum luminances are recorded, the timing controller being configured to determine a value of the first initialization voltage, based on reception information on a target maximum luminance and the first lookup table.
    Type: Application
    Filed: March 4, 2024
    Publication date: June 20, 2024
    Inventors: Ji Hyun KA, Seung Ji CHA, Mi Hae KIM, Ki Myeong EOM
  • Patent number: 11950470
    Abstract: A display device comprising: first and second pixels; a first data line connected to the first pixel and configured to have data voltages applied thereto; and a second data line connected to the second pixel, the second data line being adjacent to the first data line, and configured to have the data voltages applied thereto, wherein the first data line includes a 1A-th data line which is in a first data layer, and the second data line includes a 2B-th data line which is in a second data layer different from the first data layer.
    Type: Grant
    Filed: September 2, 2022
    Date of Patent: April 2, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hyun Ji Cha, Yun Kyeong In, Young Soo Yoon, Min Hee Choi
  • Patent number: 11922883
    Abstract: A pixel includes an organic light emitting diode (OLED), a pixel circuit, and first and second transistors. The OLD includes a cathode electrode connected to a second power source. The pixel circuit includes a driving transistor having a gate electrode initialized by a third power source. The driving transistor controls the amount of current flowing from a first power source to the second power source via the OLED. The first transistor is connected between a fourth power source and the second power source and an anode electrode of the OLED. The first transistor is turned on based on a scan signal is supplied to a scan line. The second transistor is connected between a data line and the pixel circuit. The second transistor is turned on when the scan signal is supplied to the ith scan line.
    Type: Grant
    Filed: December 8, 2022
    Date of Patent: March 5, 2024
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jin Tae Jeong, Min Ku Lee, Ji Hyun Ka, Tae Hoon Kwon, Seung Kyu Lee, Seung Ji Cha
  • Patent number: 11922884
    Abstract: A display device includes: a first pixel including a first organic light emitting diode; an initialization voltage generator for generating a first initialization voltage to be supplied to an anode of the first organic light emitting diode; and a timing controller including a first lookup table in which a plurality of first initialization voltage values corresponding to a plurality of maximum luminances are recorded, the timing controller being configured to determine a value of the first initialization voltage, based on reception information on a target maximum luminance and the first lookup table.
    Type: Grant
    Filed: February 17, 2023
    Date of Patent: March 5, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ji Hyun Ka, Seung Ji Cha, Mi Hae Kim, Ki Myeong Eom
  • Patent number: 11910674
    Abstract: A display device is disclosed, and the display device includes a substrate including first to third display regions, the second and the third display regions being spaced from each other, each of the second and third display regions having an area smaller than that of the first display region and being continuous to the first display region, first to third pixels in the first to third display regions, first to third lines connected to the first to third pixels, and a dummy part configured to compensate for a difference between a load value of the first lines and load values of the second and third lines, wherein the second display region includes a first sub-region adjacent to the first display region and a second sub-region spaced from the first display region, and the third display region includes a third sub-region adjacent to the first display region and a fourth sub-region spaced from the first display region.
    Type: Grant
    Filed: February 18, 2022
    Date of Patent: February 20, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hyung Jun Park, Yang Wan Kim, Byung Sun Kim, Su Jin Lee, Jae Yong Lee, Ji Hyun Ka, Tae Hoon Kwon, Jin Tae Jeong, Seung Ji Cha
  • Patent number: 11895884
    Abstract: A display device includes a substrate including a first pixel region, a second pixel region having an area smaller than that of the first pixel region, and a peripheral region surrounding the first pixel region and the second pixel region, a second pixel provided in the second pixel region, a second line connected to the second pixel, an extension line extended to the peripheral region, a dummy part located in the peripheral region to overlap with the extension line, a power line connected to the first and second pixel regions, and a connection line located in the peripheral region to be connected to the dummy part, the connection line being electrically connected to a portion of the second pixel region, wherein the second pixel region includes a first sub-pixel region connected to the connection line and a second sub-pixel region except the first sub-pixel region.
    Type: Grant
    Filed: November 29, 2021
    Date of Patent: February 6, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Keon Woo Kim, Ji Hyun Ka, Tae Hoon Kwon, Ho Kyoon Kwon, Min Ku Lee, Zail Lhee, Jin Tae Jeong, Seung Ji Cha, Byung Du Ahn, Jeong Ho Lee
  • Patent number: 11847973
    Abstract: The present disclosure relates to a display device including first pixels disposed in a first pixel area, and connected to first scan lines; second pixels disposed in a second pixel area, and connected to second scan lines; a timing controller configured to supply a first clock signal and a second clock signal to a first clock line and a second clock line, respectively; a first scan driver configured to receive the first clock signal through the first clock line, and to supply a first scan signal to the first scan lines; and a second scan driver configured to receive the second clock signal through the second clock line, and to supply a second scan signal to the second scan lines, wherein the second pixel area has a smaller width than the first pixel area.
    Type: Grant
    Filed: July 22, 2022
    Date of Patent: December 19, 2023
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jin Tae Jeong, Tae Hoon Kwon, Min Ku Lee, Ji Hyun Ka, Seung Kyu Lee, Seung Ji Cha
  • Publication number: 20230351937
    Abstract: A display device is provided. The display device comprises a display panel including a plurality of signal pads and one or more dummy pads, and at least one flexible wiring board providing signals to the signal pads, wherein a maximum bias period of signals provided to a pair of adjacent signal pads with at least one dummy pad interposed therebetween is longer than a maximum bias period of signals provided to a pair of adjacent signal pads with no dummy pad disposed therebetween.
    Type: Application
    Filed: July 6, 2023
    Publication date: November 2, 2023
    Inventors: TAE HOON KWON, JI HYUN KA, BYUNG SUN KIM, YANG WAN KIM, HYUNG JUN PARK, SU JIN LEE, JAE YONG LEE, JIN TAE JEONG, SEUNG JI CHA
  • Publication number: 20230326399
    Abstract: An emissive display device includes: a light emitting diode; an n-type driving transistor comprising a first driving gate electrode, a first electrode receiving a driving voltage, a second electrode transferring an output current to the anode, and a second driving gate electrode; a second transistor connected to a data line; a third transistor configured to connect the first electrode and the first driving gate electrode of the driving transistor; a storage capacitor comprising a first storage electrode and a second storage electrode connected to the first driving gate electrode; a ninth transistor transferring an overlapping electrode voltage to the second driving gate electrode; an overlapping electrode voltage line crossing the data line and receiving the overlapping electrode voltage; and a shielding electrode at an intersection of the data line and the overlapping electrode voltage line and between the data line and the overlapping electrode voltage line.
    Type: Application
    Filed: February 16, 2023
    Publication date: October 12, 2023
    Inventors: MINKU LEE, Ji-Hyun KA, Chul Kyu KANG, SEUNGHEE LEE, Hai-Jung IN, HYEONGJUN JIN, Hyun Ji CHA
  • Patent number: 11763709
    Abstract: A display device includes a substrate having a display area and a non-display area. A plurality of pixels is disposed in the display area of the substrate. A plurality of data lines is connected to the plurality of pixels. A crack sensing line is connected to at least one of the plurality of data lines. The crack sensing line is disposed in the non-display area of the substrate. A dummy pattern layer is connected to the crack sensing line.
    Type: Grant
    Filed: May 17, 2021
    Date of Patent: September 19, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Seung-Kyu Lee, Seung Ji Cha, Tae Hoon Kwon