Patents by Inventor Chong-Chul Chai

Chong-Chul Chai 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: 11957034
    Abstract: A display apparatus includes a base substrate including a display region and a peripheral region that is a non-display region surrounding the display region, a plurality of data lines disposed in the display region on the base substrate and extending to the peripheral region, a bypass data line disposed in the display region and the peripheral region on the base substrate and electrically connected to at least one of the data lines, and a dummy pattern spaced apart from the bypass data line and disposed on a same layer as the bypass data line.
    Type: Grant
    Filed: September 24, 2019
    Date of Patent: April 9, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Min-Jae Jeong, Jae-Yong Jang, Gyung-Soon Park, Kyung-Hoon Chung, Chong-Chul Chai
  • Publication number: 20240087507
    Abstract: A display device includes a light-emitting diode including a first conductivity-type semiconductor, an active layer, and a second conductivity-type semiconductor; a first voltage line to which a first voltage is applied; a second voltage line to which a second voltage is applied; a first transistor including a source electrode electrically connected to the first voltage line and a drain electrode electrically connected to a first electrode of the light-emitting diode and to the first conductivity-type semiconductor; a second transistor including a drain electrode electrically connected to a gate electrode of the first transistor and a source electrode electrically connected to a data line to apply a data signal; a capacitor electrically connected to the gate electrode of the first transistor and the first electrode; and a third transistor including a source electrode electrically connected to the second voltage line and a drain electrode electrically connected to the first electrode.
    Type: Application
    Filed: November 13, 2023
    Publication date: March 14, 2024
    Inventors: Min Jae JEONG, Kyung Bae KIM, Chong Chul CHAI, Kyung Hoon CHUNG
  • Patent number: 11908845
    Abstract: A display device includes: a base layer having a first area and a second area extending at least partially around a periphery of the first area; conductive patterns in the second area; an insulating layer over the conductive patterns in the second area; a first electrode and a second electrode on the insulating layer; and a plurality of light emitting elements between the first electrode and the second electrode in the first area and being connected to the first electrode and the second electrode. The first electrode and the second electrode are spaced apart from each other in the first area and are respectively connected to portions of the conductive patterns through contact openings penetrating the insulating layer. The light emitting elements do not overlap the conductive patterns and the insulating layer.
    Type: Grant
    Filed: August 26, 2020
    Date of Patent: February 20, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Min Kyu Woo, Kyung Bae Kim, Chong Chul Chai
  • Patent number: 11893920
    Abstract: A display device includes a display panel including pixels in a display area, scan lines disposed in the display area and electrically connected to the pixels, a gate driving circuit disposed in the display area and electrically connected to the scan lines, and clock lines disposed in the display area and electrically connected to the gate driving circuit. The gate driving circuit includes stage blocks adjacent to each other and outputting a scan signal in response to a clock signal provided through a corresponding clock line among the clock lines, and a scan signal output from a stage block among the stage blocks is supplied to scan lines of another stage block among the stage blocks.
    Type: Grant
    Filed: June 7, 2022
    Date of Patent: February 6, 2024
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Na Hyeon Cha, Sun Kwun Son, Dong Hee Shin, Chong Chul Chai
  • Patent number: 11894415
    Abstract: A display device is provided. The display device includes a first electrode including a first electrode surface extending in a first direction and a second electrode surface connected to one end of the first electrode surface and extending in a second direction that is different from the first direction, a second electrode including a third electrode surface extending in the first direction and spaced apart from the first electrode surface and facing the first electrode surface, and a fourth electrode surface extending in the second direction and spaced apart from the second electrode surface and facing the second electrode surface, and at least one light emitting element between the first electrode and the second electrode and including a first light emitting element between the first electrode surface and the third electrode surface and a second light emitting element between the second electrode surface and the fourth electrode surface.
    Type: Grant
    Filed: March 7, 2022
    Date of Patent: February 6, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yu Jin Lee, Kyung Bae Kim, Ji Hye Lee, Chong Chul Chai
  • Patent number: 11877478
    Abstract: A display device includes subpixels each comprising an emission area, electrodes which are disposed in the emission area, extend in a first direction, and are spaced apart in a second direction intersecting the first direction, a first insulating layer disposed on the electrodes, a first bank, and light emitting elements. The first bank includes a first bank part disposed on the first insulating layer and surrounding the emission area, and a second bank part connected to the first bank part and disposed in the emission area. The light emitting elements are disposed on the electrodes spaced apart in the second direction. A height of the second bank part of the first bank is lower than a height of the first bank part of the first bank.
    Type: Grant
    Filed: August 5, 2021
    Date of Patent: January 16, 2024
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Do Yeong Park, Kyung Bae Kim, Mee Hye Jung, Chong Chul Chai
  • Publication number: 20240013722
    Abstract: A pixel includes a plurality of transistors, a storage capacitor, and an organic light emitting diode. A first transistor controls the amount of current from a first driving power source to the organic light emitting diode based on a data voltage. A second transistor is connected to a data line and is turned on based on a scan signal. A third transistor coupled to the first transistor and is turned on based on the scan signal. A first stabilizing transistor is coupled to the third transistor or between the first and third transistors and is turned off when the third transistor is turned off.
    Type: Application
    Filed: September 25, 2023
    Publication date: January 11, 2024
    Applicant: Samsung Display Co., Ltd.
    Inventors: Chong Chul CHAI, Dong Woo KIM, Kyoung Ju SHIN, Bo Yong CHUNG
  • Patent number: 11817046
    Abstract: A display device includes a light-emitting diode including a first conductivity-type semiconductor, an active layer, and a second conductivity-type semiconductor; a first voltage line to which a first voltage is applied; a second voltage line to which a second voltage is applied; a first transistor including a source electrode electrically connected to the first voltage line and a drain electrode electrically connected to a first electrode of the light-emitting diode and to the first conductivity-type semiconductor; a second transistor including a drain electrode electrically connected to a gate electrode of the first transistor and a source electrode electrically connected to a data line to apply a data signal; a capacitor electrically connected to the gate electrode of the first transistor and the first electrode; and a third transistor including a source electrode electrically connected to the second voltage line and a drain electrode electrically connected to the first electrode.
    Type: Grant
    Filed: November 23, 2022
    Date of Patent: November 14, 2023
    Assignee: Samsung Display Co., Ltd.
    Inventors: Min Jae Jeong, Kyung Bae Kim, Chong Chul Chai, Kyung Hoon Chung
  • Publication number: 20230327051
    Abstract: A display device includes contact electrodes on a substrate; an interlayer insulation layer on the contact electrodes; a passivation layer on the interlayer insulation layer; pixel electrodes on the passivation layer; a first insulation layer on the pixel electrodes; light emitting elements between the pixel electrodes; and connection electrodes electrically connected to the light emitting elements, wherein the passivation layer and/or the first insulation layer include an opening exposing the interlayer insulation layer, and the connection electrodes are in contact with the contact electrodes through a contact portion penetrating the interlayer insulation layer exposed by the opening.
    Type: Application
    Filed: April 6, 2023
    Publication date: October 12, 2023
    Inventors: Do Yeong PARK, Chong Chul CHAI, Jin Seon KWAK, Kyung Bae KIM
  • Publication number: 20230317907
    Abstract: A display device includes first, second, and third pixels adjacent to each other. Each of the first, second, and third pixels includes: light emitting elements; connection electrodes electrically connected to ends of the light emitting elements; and sub-electrodes on a same layer as the connection electrodes and electrically connected to the connection electrodes, and one of the sub-electrodes of the first pixel is electrically connected to one of the sub-electrodes of the second pixel.
    Type: Application
    Filed: February 23, 2023
    Publication date: October 5, 2023
    Inventors: Do Yeong PARK, Kyung Bae KIM, Chong Chul CHAI
  • Publication number: 20230317910
    Abstract: A display device includes a first voltage line and a second voltage line extending in a first direction and spaced apart from each other in a second direction, a data line disposed between the first voltage line and the second voltage lines and extending in the first direction, a first electrode extending in the first direction and electrically connected to the first voltage line, a second electrode extending in the first direction and electrically connected to the second voltage line, light emitting elements on the first electrode and the second electrode, and a first connection pattern layer spaced apart from the first electrode and the second electrode and electrically connected to the first voltage line, and a second connection pattern layer electrically connected to the data line. The first connection pattern layer, the second connection pattern layer, the first electrode, and the second electrode are on a same layer.
    Type: Application
    Filed: March 28, 2023
    Publication date: October 5, 2023
    Applicant: Samsung Display Co., LTD.
    Inventors: Do Yeong PARK, Chong Chul CHAI, Sung Chul HONG
  • Publication number: 20230317908
    Abstract: A display device includes a substrate; a conductive layer on the substrate and including a first voltage line, a second voltage line, and a contact conductive pattern spaced from each other; a passivation layer on the conductive layer; a via layer on the passivation layer; an alignment line on the via layer and including a first alignment line and a second alignment line spaced from each other; a light emitting element between the first alignment line and the second alignment line on the alignment line; and a first contact electrode and a second contact electrode on the light emitting element and spaced from each other, wherein: the first alignment line is electrically connected to the second voltage line through a first alignment contact hole, the second alignment line is electrically connected to the first voltage line through a second alignment contact hole.
    Type: Application
    Filed: March 10, 2023
    Publication date: October 5, 2023
    Inventors: Do Yeong PARK, Kyung Bae KIM, Chong Chul CHAI, Sung Chul HONG
  • Publication number: 20230316964
    Abstract: A display device comprises a display area and a first non-display area located on a side of the display area in a first direction, a first bus pattern disposed in the first non-display area, a second bus pattern disposed in the first non-display area and spaced apart from the first bus pattern in a second direction intersecting the first direction, first voltage lines disposed in the display area, extending in the first direction, and electrically connected to the first bus pattern, second voltage lines disposed in the display area, extending in the first direction, and electrically connected to the second bus pattern, and a first test pad disposed in the first non-display area and disposed between the first bus pattern and the second bus pattern.
    Type: Application
    Filed: December 12, 2022
    Publication date: October 5, 2023
    Applicant: Samsung Display Co., LTD.
    Inventors: Do Yeong PARK, Chong Chul CHAI
  • Publication number: 20230275099
    Abstract: A display device may include: a substrate including a display area having first to third areas, and a non-display area; first pixels in the first area, second pixels in the second area, and third pixels in the third area; a pad part located in the non-display area, and electrically connected to the first to third pixels; a line part including a first line between the pad part and the first area, a second line between the pad part and the second area, and a third line between the pad part and the second area; a bridge line extending in a first direction, and located in the second and third areas; and an extension line extending in a second direction, and located in the second area and electrically connected with the bridge line. The extension line may be electrically connected with the third line.
    Type: Application
    Filed: January 9, 2023
    Publication date: August 31, 2023
    Inventors: Sang Yong NO, Sun Kwun SON, Chong Chul CHAI
  • Patent number: 11710432
    Abstract: A method of testing a display panel including a pixel coupled to first, second, and third power lines, a data line, scan lines, an emission control line, and a test line, the method includes: applying a first power supply voltage to the first power line; applying a test voltage having a turn-on voltage level to the second power line; applying a scan signal having a turn-on voltage level sequentially to the scan lines and an emission control signal having a turn-on voltage level to the emission control line; applying a gate signal to the test line to turn on a test transistor coupled between two electrode of a light emitting element included in the pixel; measuring a sensing voltage output through the data line; and determining whether the pixel is defective, based on a voltage level of the measured sensing voltage.
    Type: Grant
    Filed: May 20, 2022
    Date of Patent: July 25, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hyun Joon Kim, Jun Ki Jeong, Kyung Hoon Chung, Kyung Bae Kim, Seung Chan Lee, Chong Chul Chai
  • Publication number: 20230230546
    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: March 20, 2023
    Publication date: July 20, 2023
    Inventors: Chong-Chul CHAI, Oh-Kyong KWON, Nack-Hyeon KEUM, Kyong-Hwan OH, Young-Wan SEO, Yong-Koo HER, In-Jae HWANG
  • Publication number: 20230216008
    Abstract: A display device includes a display area including first to third areas, first and second signal lines in the display area, pixels connected to the first and second signal lines, a first pad area at one side of the second area, first lines in the second area and connected from the second area to the first pad area, and bridges in the display area and connecting second signal lines in the first area to the first lines. The first area may include first pixel columns including different second signal lines in the first area. The second area may include second pixel columns including different second signal lines in the second area and different first lines. Each of the second pixel columns may include a number of the first lines corresponding to a ratio of a number of the first pixel columns to a number of the second pixel columns.
    Type: Application
    Filed: November 22, 2022
    Publication date: July 6, 2023
    Inventors: Sun Kwun SON, Dong Hee SHIN, Na Hyeon CHA, Chong Chul CHAI
  • Publication number: 20230207610
    Abstract: A display device includes a first electrode extending in a first direction, a second electrode spaced apart from the first electrode in a second direction, light emitting elements that are disposed on the first electrode and the second electrode, a first connection electrode electrically connected to a first end of the light emitting elements, and a second connection electrode electrically connected to a second end of the light emitting elements. The first connection electrode includes a first main portion disposed on the first electrode and in electrical contact with the light emitting elements, a first bypass portion partially spaced apart from the first main portion, and first connection portions electrically connecting the first main portion to the first bypass portion.
    Type: Application
    Filed: December 28, 2022
    Publication date: June 29, 2023
    Applicant: Samsung Display Co., LTD.
    Inventors: Do Yeong PARK, Chong Chul CHAI, Kyung Bae KIM
  • Publication number: 20230207759
    Abstract: A display device may include a pixel part including a pixel, a pad part including a first pad part and a second pad part, and a connection line including a first connection line extending in a first direction and a second connection line extending in a second direction. The display area may include a first display area overlapping the first pad part in the first direction and a second display area overlapping the second pad part in the first direction.
    Type: Application
    Filed: October 19, 2022
    Publication date: June 29, 2023
    Applicant: Samsung Display Co., LTD.
    Inventors: Dong Hee SHIN, Sun Kwun SON, Chong Chul CHAI, Na Hyeon CHA
  • Publication number: 20230207770
    Abstract: A display device includes: a substrate including first areas and second areas alternately arranged in a first direction in a plane view; a first electrode and a second electrode on the substrate and spaced apart from each other in a second direction crossing the first direction; a first insulation layer on the substrate and covering the first electrode and the second electrode; and a light emitting element on the first insulation layer and electrically connected to the first electrode and the second electrode, the first insulation layer having a first thickness in the first area and a second thickness thicker than the first thickness in the second area, and the light emitting element being located in the first area.
    Type: Application
    Filed: March 3, 2023
    Publication date: June 29, 2023
    Inventors: Kyung Bae KIM, Ji Eun LEE, Chong Chul CHAI