Patents by Inventor Kyung Hoon Chung

Kyung Hoon Chung 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: 11127343
    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: January 8, 2020
    Date of Patent: September 21, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Min Jae Jeong, Kyung Bae Kim, Chong Chul Chai, Kyung Hoon Chung
  • Patent number: 11114033
    Abstract: A pixel including: a light emitter; a first transistor including first and second electrodes respectively connected to power and the light emitter, the first transistor controlling driving current; a first capacitor between a second and third node; a second transistor between the third node and data line and turned on by a scan signal; a third transistor between a first and second node, and turned on by a control signal; a fourth transistor between power and the third node, and turned on by a emission control signal; a fifth transistor between power and the first electrode, and turned on by the emission control signal; a sixth transistor between the second node and the light emitter, and turned on by another emission control signal; and a second capacitor between power and the first node, wherein the fourth, fifth and sixth transistors turn-on/off at least four times in a non-emission period.
    Type: Grant
    Filed: April 22, 2020
    Date of Patent: September 7, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jun Hyun Park, Bon Yong Koo, Yu Jin Lee, Kyung Hoon Chung, Chong Chul Chai
  • Publication number: 20210256908
    Abstract: A display device includes a display panel including a plurality of pixels, a timing controller which generates an emission start signal, an emission driver which supplies an emission control signal to the plurality of pixels based on the emission start signal received from the timing controller, a first scan driver which supplies a first scan signal to the plurality of pixels, a second scan driver which supplies a second scan signal to the plurality of pixels, and a data driver which supplies a data signal to the plurality of pixels. The timing controller adjusts a period in which the emission start signal is supplied based on a change of a driving frequency.
    Type: Application
    Filed: October 14, 2020
    Publication date: August 19, 2021
    Inventors: Jun Hyun PARK, Bon Yong KOO, Byung Chang YU, Yu Jin LEE, Kyung Hoon CHUNG
  • Patent number: 11079571
    Abstract: A laser processing apparatus includes a laser source which generates a laser beam; a scanner unit disposed in an optical path of the laser beam from the laser source and which adjusts the optical path of the laser beam from the laser source in a first direction or in a second direction different from the first direction; and a reflector unit disposed in an optical path of the laser beam adjusted by the scanner unit and which reflects the laser beam adjusted by the scanner unit, where the reflector unit includes a first sub-reflector unit which shifts an optical path of the laser adjusted by the scanner unit in the first direction, and a second sub-reflector unit which shifts an optical path of the laser beam adjusted by the scanner unit in a third direction opposite to the first direction.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: August 3, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Emil Aslanov, Je Kil Ryu, Hae Sook Lee, Kyung Hoon Chung, Gyoo Wan Han
  • Publication number: 20210231993
    Abstract: A tiled display device includes an array of a plurality of display panels. Each of the plurality of display panels includes a plurality of pixels constituting a plurality of pixel rows and a plurality of pixel columns, a data distributor disposed between a first pixel of a first pixel row among the plurality of pixel rows and a second pixel of the first pixel row adjacent to the first pixel in a first direction, and a scan driver disposed between the second pixel and a third pixel adjacent to the second pixel in the first direction.
    Type: Application
    Filed: April 15, 2021
    Publication date: July 29, 2021
    Inventors: JUN KI JEONG, Hyun Joon KIM, Kyung Bae KIM, Kyung Hoon CHUNG, Chong Chul CHAI
  • Patent number: 11069726
    Abstract: A method of manufacturing a display device, the method including providing a substrate, forming a first electrode, a second electrode spaced from the first electrode and in a same plane as the first electrode, a first alignment line connected to the first electrode, and a second alignment line connected to the second electrode on the substrate, self-aligning the plurality of light emitting elements by providing a solution containing a plurality of light emitting elements on the substrate, removing the first alignment line and the second alignment line from the substrate on which the plurality of light emitting elements are self-aligned, forming a first contact electrode electrically connecting one end of each light emitting element to the first electrode, and forming a second contact electrode electrically connecting an other end of each light emitting element to the second electrode.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: July 20, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hyun Joon Kim, Kyung Bae Kim, Kyung Hoon Chung, Mee Hye Jung
  • Patent number: 10983381
    Abstract: A tiled display device includes an array of a plurality of display panels. Each of the plurality of display panels includes a plurality of pixels constituting a plurality of pixel rows and a plurality of pixel columns, a data distributor disposed between a first pixel of a first pixel row among the plurality of pixel rows and a second pixel of the first pixel row adjacent to the first pixel in a first direction, and a scan driver disposed between the second pixel and a third pixel adjacent to the second pixel in the first direction.
    Type: Grant
    Filed: August 7, 2019
    Date of Patent: April 20, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jun Ki Jeong, Hyun Joon Kim, Kyung Bae Kim, Kyung Hoon Chung, Chong Chul Chai
  • Publication number: 20210074215
    Abstract: A light emission driver includes a plurality of stages outputs a light emission control signal. Each of the stages includes an input circuit controlling voltages of a first node and a second node, an output circuit supplying a voltage of first power or a second power to an output terminal, a first signal processor controlling a voltage of a fourth node based on a signal supplied to a third input terminal and a voltage of a fifth node, a second signal processor controlling the voltage of the fourth node in response to the voltage of a third node, a first stabilizer limiting voltage drops of the first node and the second node, and a second stabilizer controlling an electrical connection between the third node and the first node in response to the voltage of the fourth node.
    Type: Application
    Filed: June 1, 2020
    Publication date: March 11, 2021
    Inventors: Jun Hyun PARK, Bon Yong KOO, Yu Jin LEE, Kyung Hoon CHUNG
  • Publication number: 20210065616
    Abstract: A pixel circuit includes: a first transistor including a gate electrode connected to a first node, a source electrode connected to a first power line, and a drain electrode connected to a second power line; a light emitting element connected between the first transistor and the first or second power line; a second transistor connected between a data line and the first node, and including a gate electrode connected to a first scan line; a first capacitor connected between the first node and the source electrode of the first transistor; a third transistor connected between the first node and the first power line, and including a gate electrode connected to a second node; a fourth transistor connected between the second node and the data line, and including a gate electrode connected to a second scan line; and a second capacitor connected between the second node and a first control line.
    Type: Application
    Filed: July 8, 2020
    Publication date: March 4, 2021
    Inventors: Hyun Joon KIM, Kyung Hoon CHUNG
  • Publication number: 20210027701
    Abstract: A pixel including: a light-emitting element; a first transistor including a first electrode coupled to a power source and a second electrode coupled to the light-emitting element; a first capacitor between a second and a third node; a second transistor between the third node and a data line and turned on by a scan signal; a third transistor between a first node and the second node and turned on by a first control signal; a fourth transistor between the power source and the third node and turned on by a second control signal; a fifth transistor between the power source and the first electrode of the first transistor and turned on by an emission control signal; a sixth transistor between the second node and the light-emitting element and turned on by a previous emission control signal; and a second capacitor between the power source and the first node.
    Type: Application
    Filed: April 20, 2020
    Publication date: January 28, 2021
    Inventors: Jun Hyun PARK, Bon Yong KOO, Yu Jin LEE, Kyung Hoon CHUNG, Chong Chul CHAI
  • Publication number: 20210027702
    Abstract: A pixel including a light emitter; a first transistor including first and second electrodes respectively connected to power and the light emitter, the first transistor controlling, driving current a first capacitor between a second and third node; a second transistor between the third node and data line and turned on by a scan signal; a third transistor between a first and second node, and turned on by a control signal; a fourth transistor between power and the third node, and turned on by a emission control signal; a fifth transistor between power and the first electrode, and turned on by the emission control signal; a sixth transistor between the second node and the light emitter, and turned on by another emission control signal; and a second capacitor between power and the first node, wherein the fourth, fifth and sixth transistors turn-on/off at least four times in a non-emission period.
    Type: Application
    Filed: April 22, 2020
    Publication date: January 28, 2021
    Inventors: Jun Hyun PARK, Bon Yong KOO, Yu Jin LEE, Kyung Hoon CHUNG, Chong Chul CHAI
  • Patent number: 10857574
    Abstract: A mask cleaning apparatus includes: a mask holding unit configured to hold a mask; a light source unit configured to irradiate light onto the mask to remove a deposition material accumulated on a surface of the mask; and a material collecting unit configured to collect the deposition material removed from the mask, wherein the material collecting unit includes: a plurality of collecting cases corresponding to kinds of the deposition material; a rotating plate having a suction hole; and a plate driving unit configured to rotate the rotating plate to connect the suction hole to at least one of the collecting cases. Based on the irradiated light, different organic deposition materials may be collected for reuse.
    Type: Grant
    Filed: May 29, 2018
    Date of Patent: December 8, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Myung Kyu Kim, Kyung Hoon Chung
  • Publication number: 20200302840
    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: March 17, 2020
    Publication date: September 24, 2020
    Inventors: Hyun Joon KIM, Jun Ki JEONG, Kyung Hoon CHUNG, Kyung Bae KIM, Seung Chan LEE, Chong Chul CHAI
  • Publication number: 20200273397
    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: January 8, 2020
    Publication date: August 27, 2020
    Inventors: Min Jae JEONG, Kyung Bae KIM, Chong Chul CHAI, Kyung Hoon CHUNG
  • Publication number: 20200159054
    Abstract: A tiled display device includes an array of a plurality of display panels. Each of the plurality of display panels includes a plurality of pixels constituting a plurality of pixel rows and a plurality of pixel columns, a data distributor disposed between a first pixel of a first pixel row among the plurality of pixel rows and a second pixel of the first pixel row adjacent to the first pixel in a first direction, and a scan driver disposed between the second pixel and a third pixel adjacent to the second pixel in the first direction.
    Type: Application
    Filed: August 7, 2019
    Publication date: May 21, 2020
    Inventors: JUN KI JEONG, HYUN JOON KIM, KYUNG BAE KIM, KYUNG HOON CHUNG, CHONG CHUL CHAI
  • Patent number: 10657875
    Abstract: A display driving device including: a gate driver configured to provide a first gate selection signal to a first gate line of a display panel to select the first gate line; a source driver configured to provide an image signal corresponding to the first gate line to a source line; an Electrostatic Discharge (ESD) detection circuit configured to receive a power supply voltage, determine whether there is an ESD in the power supply voltage and, when the ESD is detected, generate a first detection signal; and a controller configured to receive the first detection signal to generate a masking signal, wherein the gate driver is configured to receive the masking signal and not provide a second gate selection signal to select a second gate line.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: May 19, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kyung-Hoon Chung, Won Sik Kang, Jae Sung Kang, Hyeok Chul Kwon, Si Woo Kim, Su Hyun Yun, Sang Kyu Lee, Ji Hyun Lee, Seng-Sub Chun, Jong Han Choi
  • Patent number: 10559262
    Abstract: A scan sense driver includes a scan driver and a sense driver. The scan line driver provides a scan line enable signal based on a plurality of clock signals, a global clock signal, and a scan input signal during a scan time interval. The sense driver provides a sense enable signal based on the clock signals and a sense input signal during a sense time interval. The sense driver provides the sense enable signal during a period when an organic light-emitting diode of a pixel is to be tested for a malfunction.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: February 11, 2020
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventor: Kyung-Hoon Chung
  • Publication number: 20190244985
    Abstract: A method of manufacturing a display device, the method including providing a substrate, forming a first electrode, a second electrode spaced from the first electrode and in a same plane as the first electrode, a first alignment line connected to the first electrode, and a second alignment line connected to the second electrode on the substrate, self-aligning the plurality of light emitting elements by providing a solution containing a plurality of light emitting elements on the substrate, removing the first alignment line and the second alignment line from the substrate on which the plurality of light emitting elements are self-aligned, forming a first contact electrode electrically connecting one end of each light emitting element to the first electrode, and forming a second contact electrode electrically connecting an other end of each light emitting element to the second electrode.
    Type: Application
    Filed: January 30, 2019
    Publication date: August 8, 2019
    Inventors: Hyun Joon KIM, Kyung Bae KIM, Kyung Hoon CHUNG, Mee Hye JUNG
  • Publication number: 20190147790
    Abstract: A display driving device including: a gate driver configured to provide a first gate selection signal to a first gate line of a display panel to select the first gate line; a source driver configured to provide an image signal corresponding to the first gate line to a source line; an Electrostatic Discharge (ESD) detection circuit configured to receive a power supply voltage, determine whether there is an ESD in the power supply voltage and, when the ESD is detected, generate a first detection signal; and a controller configured to receive the first detection signal to generate a masking signal, wherein the gate driver is configured to receive the masking signal and not provide a second gate selection signal to select a second gate line.
    Type: Application
    Filed: July 13, 2018
    Publication date: May 16, 2019
    Inventors: Kyung-Hoon CHUNG, Won Sik KANG, Jae Sung KANG, Hyeok Chui KWON, Si Woo KIM, Su Hyun YUN, Sang Kyu LEE, Ji Hyun LEE, Seng-Sub CHUN, Jong Han CHOI
  • Patent number: 10172233
    Abstract: A display device includes: a flexible substrate including a display unit and a plurality of peripheral units which surrounds the display unit and are bent to overlap a part of the display unit; a display member positioned at the display unit and which displays an image; and a signal line positioned at the plurality of peripheral units, where the plurality of peripheral units is bent in a way such that parts of the signal line, which are respectively positioned at adjacent peripheral units, are in contact with each other.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: January 1, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Kyung Hoon Chung, Chul Kyu Kang