Patents by Inventor Hyun-Joon Kim

Hyun-Joon Kim 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).

  • DISPLAY DEVICE AND METHOD OF FABRICATING THE SAME
    Publication number: 20220310579
    Abstract: A display device and a method for fabricating the same. The display device includes a substrate including a circuit layer and a first pad unit; an auxiliary substrate disposed below the substrate and comprising a driving circuit and a second pad unit; a light-emitting unit disposed on the circuit layer; and a connection electrode in contact with a side surface of the substrate and electrically connecting the first pad unit with the second pad unit. The method includes forming a circuit layer and a first pad unit on a first surface of a substrate; forming a driving circuit and a second pad unit on a fourth surface of an auxiliary substrate; and attaching a second surface of the substrate opposite the first surface to a third surface of the auxiliary substrate opposite the fourth surface.
    Type: Application
    Filed: June 15, 2022
    Publication date: September 29, 2022
    Applicant: Samsung Display Co. Ltd.
    Inventors: Seung Chan LEE, Gun Hee KIM, Sang Ho PARK, Ju Won YOON, Joo Hee JEON, Hyun Joon KIM
  • Display device including pixels with different types of transistors
    Patent number: 11437456
    Abstract: A display device may include a plurality of pixels each including a light emitting element. A first scan line and a second scan line, are disposed in each of the pixels. A data line is disposed in each of the pixels. A power line is disposed in each of the pixels. A reference voltage line is disposed in each of the pixels. A first transistor controls a current of the light emitting element. A second transistor is connected between the data line and a first gate electrode of the first transistor. A third transistor is connected between the reference voltage line and a first electrode of the first transistor. A fourth transistor is connected between the power line and a second electrode of the first transistor. The fourth transistor may be a transistor of a type different from that of the first to third transistors.
    Type: Grant
    Filed: April 13, 2021
    Date of Patent: September 6, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hee Rim Song, Hyun Joon Kim, Hae Min Kim, Mee Hye Jung
  • DISPLAY PANEL AND METHOD OF TESTING DISPLAY PANEL
    Publication number: 20220277677
    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: Application
    Filed: May 20, 2022
    Publication date: September 1, 2022
    Applicant: Samsung Display Co., Ltd.
    Inventors: Hyun Joon KIM, Jun Ki JEONG, Kyung Hoon CHUNG, Kyung Bae KIM, Seung Chan LEE, Chong Chul CHAI
  • Display device
    Patent number: 11404005
    Abstract: A display device including: a pixel connected to first, second and third scan lines, a data line, and an emission line, the pixel including: an LED; a first transistor including a first electrode connected to a first node, a second electrode connected to a second node, and a gate electrode connected to a third node; a second transistor connected between the data line and the first node and including a gate electrode connected to the first scan line; a third transistor connected between the second node and the third node and including a gate electrode connected to the second scan line; a fourth transistor connected between the second node and a power source and including a gate electrode connected to the third scan line; and a fifth transistor connected between the second node and an anode of the LED and including a gate electrode connected to the second scan line.
    Type: Grant
    Filed: January 6, 2021
    Date of Patent: August 2, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Min Kyu Woo, Hyun Joon Kim
  • Pixel and a display device having the same
    Patent number: 11404003
    Abstract: A pixel including: a light emitting element; a first transistor connected between a first power source and a second node; a first capacitor connected to a first node or a second node and a third node; a second transistor between the third node and a data line, the second transistor turned on by a first scan signal; a third transistor between the first and second nodes, the third transistor turned on by a second scan signal; a fifth transistor between the first power source and the first transistor, the fifth transistor turned on by a first emission control signal; a sixth transistor between the second node and the light emitting element, the sixth transistor turned on by a second emission control signal; and an eighth transistor between the second node and a second emission control line, the eighth transistor turned on by a fourth scan signal.
    Type: Grant
    Filed: March 3, 2021
    Date of Patent: August 2, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Min Jae Jeong, Jun Hyun Park, Hyun Joon Kim, Kyung Hoon Chung, Jang Mi Kang, Hae Min Kim
  • Display device and method of fabricating the same
    Patent number: 11393804
    Abstract: A display device and a method for fabricating the same. The display device includes a substrate including a circuit layer and a first pad unit; an auxiliary substrate disposed below the substrate and comprising a driving circuit and a second pad unit; a light-emitting unit disposed on the circuit layer; and a connection electrode in contact with a side surface of the substrate and electrically connecting the first pad unit with the second pad unit. The method includes forming a circuit layer and a first pad unit on a first surface of a substrate; forming a driving circuit and a second pad unit on a fourth surface of an auxiliary substrate; and attaching a second surface of the substrate opposite the first surface to a third surface of the auxiliary substrate opposite the fourth surface.
    Type: Grant
    Filed: April 2, 2019
    Date of Patent: July 19, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Seung Chan Lee, Gun Hee Kim, Sang Ho Park, Ju Won Yoon, Joo Hee Jeon, Hyun Joon Kim
  • LIGHT-EMITTING DISPLAY DEVICE AND PIXEL THEREOF
    Publication number: 20220172682
    Abstract: A pixel of a light-emitting display device includes a capacitor, a first transistor, a second transistor including a gate receiving a gate writing signal, a third transistor including a gate receiving a scan signal, a fourth transistor including a gate receiving a gate initialization signal, a fifth transistor including a gate receiving a first emission signal, a sixth transistor including a gate receiving a second emission signal, and a light-emitting diode. The scan signal and the gate writing signal may be provided at a first frequency, and the first emission signal, the second emission signal and the gate initialization signal may be provided at a second frequency higher than the first frequency.
    Type: Application
    Filed: February 18, 2022
    Publication date: June 2, 2022
    Inventors: Hyun Joon Kim, Jun Ki Jeong
  • Display panel and method of testing display panel
    Patent number: 11341878
    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: March 17, 2020
    Date of Patent: May 24, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hyun Joon Kim, Jun Ki Jeong, Kyung Hoon Chung, Kyung Bae Kim, Seung Chan Lee, Chong Chul Chai
  • EMISSIVE DISPLAY DEVICE
    Publication number: 20220148502
    Abstract: An emissive display device includes a display area which includes a plurality of pixels, and a driver disposed at a side of the display area, where the driver includes at least two emission signal stages disposed in one row, and an input signal line connected to the emission signal stages, and the at least two emission signal stages are connected to the same input signal line.
    Type: Application
    Filed: July 29, 2021
    Publication date: May 12, 2022
    Inventors: Hae Min KIM, Min Jae JEONG, Jang Mi KANG, Hyun Joon KIM, Jun Hyun PARK, Cheol-Gon LEE
  • SCAN DRIVER AND DISPLAY DEVICE
    Publication number: 20220130337
    Abstract: A scan driver includes stages, each of the stages receiving first and second clock signals having a first low level as an active level, and a third clock signal having a high level as the active level. Each of the stages includes a logic circuit that changes a voltage of a first node to the first low level based on an input signal and the first clock signal, and changes a voltage of the first node to a second low level lower than the first low level based on the second clock signal, a first output buffer that outputs, as an active-low scan signal, the second clock signal in response to the voltage of the first node, and a second output buffer that outputs, as an active-high scan signal, the third clock signal in response to the voltage of the first node.
    Type: Application
    Filed: January 5, 2022
    Publication date: April 28, 2022
    Applicant: Samsung Display Co., LTD.
    Inventor: Hyun Joon KIM
  • DISPLAY DEVICE WITH INTERNAL COMPENSATION
    Publication number: 20220101777
    Abstract: A display device according to an embodiment of the present disclosure includes pixels connected to a first scan line, a second scan line, a third scan line, a data line, a first emission control line, and a second emission control line.
    Type: Application
    Filed: May 18, 2021
    Publication date: March 31, 2022
    Inventors: Hyun Joon Kim, Jang Mi Kang, Hae Min Kim, Jun Hyun Park, Min Jae Jeong, Ki Hyun Pyo
  • LIGHT EMITTING DIODE DISPLAY DEVICE
    Publication number: 20220102463
    Abstract: A light emitting diode display device includes: a pixel circuit; a data line connected to the pixel circuit to transmit a data voltage; an anode on the pixel circuit and the data line; an emission layer on the anode; and a cathode on the emission layer. The anode includes a first anode and a second anode, and the data line extends across the first anode and the second anode.
    Type: Application
    Filed: May 4, 2021
    Publication date: March 31, 2022
    Inventors: Jun Hyun PARK, Jang Mi KANG, Hyun Joon KIM, Hae Min KIM, Min Jae JEONG
  • Light-emitting display device and pixel thereof
    Patent number: 11257437
    Abstract: A pixel of a light-emitting display device includes a capacitor, a first transistor, a second transistor including a gate receiving a gate writing signal, a third transistor including a gate receiving a scan signal, a fourth transistor including a gate receiving a gate initialization signal, a fifth transistor including a gate receiving a first emission signal, a sixth transistor including a gate receiving a second emission signal, and a light-emitting diode. The scan signal and the gate writing signal may be provided at a first frequency, and the first emission signal, the second emission signal and the gate initialization signal may be provided at a second frequency higher than the first frequency.
    Type: Grant
    Filed: November 9, 2020
    Date of Patent: February 22, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hyun Joon Kim, Jun Ki Jeong
  • PIXEL AND A DISPLAY DEVICE HAVING THE SAME
    Publication number: 20220028333
    Abstract: A pixel including: a light emitting element; a first transistor connected between a first power source and a second node; a first capacitor connected to a first node or a second node and a third node; a second transistor between the third node and a data line, the second transistor turned on by a first scan signal; a third transistor between the first and second nodes, the third transistor turned on by a second scan signal; a fifth transistor between the first power source and the first transistor, the fifth transistor turned on by a first emission control signal; a sixth transistor between the second node and the light emitting element, the sixth transistor turned on by a second emission control signal; and an eighth transistor between the second node and a second emission control line, the eighth transistor turned on by a fourth scan signal.
    Type: Application
    Filed: March 3, 2021
    Publication date: January 27, 2022
    Inventors: Min Jae JEONG, Jun Hyun PARK, Hyun Joon KIM, Kyung Hoon CHUNG, Jang Mi KANG, Hae Min KIM
  • Scan driver and display device
    Patent number: 11222596
    Abstract: A scan driver includes stages, each of the stages receiving first and second clock signals having a first low level as an active level, and a third clock signal having a high level as the active level. Each of the stages includes a logic circuit that changes a voltage of a first node to the first low level based on an input signal and the first clock signal, and changes a voltage of the first node to a second low level lower than the first low level based on the second clock signal, a first output buffer that outputs, as an active-low scan signal, the second clock signal in response to the voltage of the first node, and a second output buffer that outputs, as an active-high scan signal, the third clock signal in response to the voltage of the first node.
    Type: Grant
    Filed: July 24, 2020
    Date of Patent: January 11, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventor: Hyun Joon Kim
  • Display device for improving display quality
    Patent number: 11211011
    Abstract: The present inventive concept relates to a display device. Specifically, the display device according to an embodiment of the present inventive concept includes pixels; a scan driver supplying a first scan signal, a third scan signal, and a fourth scan signal at a first frequency and supplying a second scan signal at a second frequency that is a divisor of the first frequency; a data driver supplying a data signal at the second frequency; an emission driver supplying an emission control signal at the first frequency; and a timing controller.
    Type: Grant
    Filed: September 29, 2020
    Date of Patent: December 28, 2021
    Inventors: Hyun Joon Kim, Jun Ki Jeong
  • DISPLAY DEVICE INCLUDING PIXELS WITH DIFFERENT TYPES OF TRANSISTORS
    Publication number: 20210399072
    Abstract: A display device may include a plurality of pixels each including a light emitting element. A first scan line and a second scan line, are disposed in each of the pixels. A data line is disposed in each of the pixels. A power line is disposed in each of the pixels. A reference voltage line is disposed in each of the pixels. A first transistor controls a current of the light emitting element. A second transistor is connected between the data line and a first gate electrode of the first transistor. A third transistor is connected between the reference voltage line and a first electrode of the first transistor. A fourth transistor is connected between the power line and a second electrode of the first transistor. The fourth transistor may be a transistor of a type different from that of the first to third transistors.
    Type: Application
    Filed: April 13, 2021
    Publication date: December 23, 2021
    Inventors: Hee Rim Song, Hyun Joon Kim, Hae Min Kim, Mee Hye Jung
  • LIGHT EMITTING DEVICE AND METHOD FOR MANUFACTURING SAME
    Publication number: 20210399040
    Abstract: A light emitting device comprises: a substrate; a first electrode on the substrate, the first electrode having holes, and having inclined surfaces along the peripheries of the holes; second electrodes on the substrate, each of which is in a respective one of the holes of the first electrode; and light emitting elements between the first electrode and the second electrodes, the light-emitting elements being electrically connected to the first electrode and the second electrodes.
    Type: Application
    Filed: June 11, 2019
    Publication date: December 23, 2021
    Inventors: Chong Chul CHAI, Hyun Joon KIM, Hyun Min CHO, Kyung Bae KIM, Min Jae JEONG
  • OPTICAL PATH CONTROL MEMBER AND DISPLAY DEVICE COMPRISING SAME
    Publication number: 20210373403
    Abstract: An optical path control member according to an embodiment comprises: a lower substrate; a lower electrode disposed on the lower substrate; an upper substrate disposed on the lower substrate; an upper electrode disposed under the upper substrate; and a pattern part interposed between the lower electrode and the upper electrode, wherein: the pattern part includes a first pattern part and a second pattern part alternately disposed; the first pattern part has an optical transmittance varying according to an applied voltage; the second pattern part transmits light; and the width of the first pattern part varies as the first pattern part extends from a light emitting part to a light transmitting part.
    Type: Application
    Filed: September 3, 2019
    Publication date: December 2, 2021
    Inventors: Hyun Joon KIM, Jun Sik SHIN
  • DISPLAY DEVICE
    Publication number: 20210343240
    Abstract: A display device including: a pixel connected to first, second and third scan lines, a data line, and an emission line, the pixel including: an LED; a first transistor including a first electrode connected to a first node, a second electrode connected to a second node, and a gate electrode connected to a third node; a second transistor connected between the data line and the first node and including a gate electrode connected to the first scan line; a third transistor connected between the second node and the third node and including a gate electrode connected to the second scan line; a fourth transistor connected between the second node and a power source and including a gate electrode connected to the third scan line; and a fifth transistor connected between the second node and an anode of the LED and including a gate electrode connected to the second scan line.
    Type: Application
    Filed: January 6, 2021
    Publication date: November 4, 2021
    Inventors: Min Kyu WOO, Hyun Joon KIM