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).

  • Publication number: 20210366888
    Abstract: A display device includes a conductive layer including a first voltage line and a second voltage line extending in a first direction; an interlayer insulating layer on the conductive layer and including a plurality of contact holes that expose parts of the conductive layer; a plurality of first-type electrodes on the interlayer insulating layer and electrically connected to the conductive layer through the plurality of contact holes, a plurality of second-type electrodes on the interlayer insulating layer and extending in the first direction, a plurality of light-emitting elements on pairs of the first-type and the second-type electrodes that are spaced from each other in the second direction; first-type contact electrodes on the first-type electrodes and in contact with the light-emitting elements; and second-type contact electrodes on the second-type electrodes and in contact with the light-emitting elements, each of the second-type contact electrodes includes contact electrode extensions on the second-type
    Type: Application
    Filed: April 28, 2021
    Publication date: November 25, 2021
    Inventors: Kyung Bae KIM, Min Kyu WOO, Do Yeong PARK, Mee Hye JUNG, Chong Chul CHAI
  • Patent number: 11164525
    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: Grant
    Filed: June 23, 2020
    Date of Patent: November 2, 2021
    Inventors: Chong-Chul Chai, Oh-Kyong Kwon, Nack-Hyeon Keum, Kyong-Hwan Oh, Young-Wan Seo, Yong-Koo Her, In-Jae Hwang
  • Patent number: 11158262
    Abstract: A display device includes a display panel including pixels; a panel driver to supply a scan signal and a data signal to the pixels; and a power supply to generate a first supply voltage and a second supply voltage, and to change the first supply voltage and/or the second supply voltage to provide it to the pixels. The pixels emit light in response to the scan signal based on the data signal during an emission period where a voltage difference between the first supply voltage and the second supply voltage is larger than a first reference voltage. A first voltage difference between the first supply voltage and the second supply voltage at a start of the emission period is larger than an average voltage difference between the first supply voltage and the second supply voltage throughout the emission period.
    Type: Grant
    Filed: June 19, 2019
    Date of Patent: October 26, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Bon Seog Gu, Hong Soo Kim, Woo Mi Bae, Ki Wan Ahn, Joo Sun Yoon, Chong Chul Chai
  • Patent number: 11158267
    Abstract: A display device includes a data driving circuit disposed in a non-display area and including output terminals for outputting a data voltage to the data-lines, a first fan-out line disposed in the non-display area and including a first end connected to an output terminal corresponding to a data line in a first-area of a display area and a second end connected to a first contact portion disposed in an area adjacent to an end of the data driving circuit, a second fan-out line disposed in the non-display-area and including a first end connected to an output terminal corresponding to a data-line in a second area of the display-area and a second end connected to the data-line in the second-area, and a bypass fan-out line disposed in the non-display area and the display area and including a first end connected to the first contact portion and a second end connected to the data-line in the first area.
    Type: Grant
    Filed: March 5, 2020
    Date of Patent: October 26, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Minjae Jeong, Gyung Soon Park, Chong Chul Chai, Jaeyong Jang
  • Patent number: 11158698
    Abstract: An organic light-emitting diode display is disclosed. In one aspect, the display includes a plurality of pixels formed in a plurality of intersection areas of a plurality of data lines and a plurality of scan lines. Each of the pixels includes a storage capacitor configured to store a data voltage, at least one target transistor having one end electrically connected to a current path of the storage capacitor, an organic light emitting layer, and a first electrode of an OLED formed over the organic light emitting layer. The first electrode includes a first electrode extension configured to block at least a portion of the target transistor from light.
    Type: Grant
    Filed: March 25, 2020
    Date of Patent: October 26, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hee Rim Song, Mu Kyung Jeon, Chong Chul Chai
  • 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
  • Patent number: 11114036
    Abstract: A scan driver includes a plurality of circuit stages, each circuit stage including a first input part configured to transfer a carry signal to a first node in response to a first clock signal, a second input part configured to transfer the first clock signal to a second node in response to a signal of the first node, a first output part configured to transfer a third clock signal to an output terminal in response to a signal of the second node, a holding part configured to maintain a signal of a third node response to a second clock signal, and a second output part configured to transfer a signal of the third node to the output terminal in response to the second clock signal.
    Type: Grant
    Filed: June 7, 2019
    Date of Patent: September 7, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Boyoung Chung, Youngwan Seo, Dongwoo Kim, Yeonkyung Kim, Chong Chul Chai
  • Publication number: 20210264856
    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: May 12, 2021
    Publication date: August 26, 2021
    Applicant: Samsung Display Co., Ltd.
    Inventors: Chong Chul CHAI, Dong Woo KIM, Kyoung Ju SHIN, Bo Yong CHUNG
  • Publication number: 20210265329
    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: Application
    Filed: August 26, 2020
    Publication date: August 26, 2021
    Inventors: Min Kyu WOO, Kyung Bae KIM, Chong Chul CHAI
  • Publication number: 20210256907
    Abstract: A display panel driver drives pixels based on first power having at least three voltage levels, second power having a constant voltage, and third power having two voltage levels. Each pixel includes a first transistor connected between first and second nodes and including a gate electrode to receive a scan signal, a second transistor connected between the second node and a third node in series with the first transistor and including a gate electrode to receive the third power, and a driving transistor connected between a source of the first power and the third node and including a gate electrode connected to the first electrode to control a driving current for an organic light emitting diode. A first capacitor is connected between a source of the third power and the first node, and a second capacitor is connected between the second node and one of the data lines.
    Type: Application
    Filed: May 6, 2021
    Publication date: August 19, 2021
    Applicant: Samsung Display Co., LTD.
    Inventors: Jun-Hyun PARK, Young-Wan SEO, An-Su LEE, Bo-Yong CHUNG, Kang-Moon JO, Chong-Chul CHAI
  • Publication number: 20210249392
    Abstract: A display device includes a substrate. A first electrode, a second electrode, and a third electrode are on the substrate, and are sequentially arranged along a first direction. A first light emitting element is located between the first electrode and the second electrode. A second light emitting element is located between the second electrode and the third electrode. A first contact electrode overlaps the first electrode and one end of the first light emitting element, and is in contact with the first electrode and the one end of the first light emitting element. A second contact electrode overlaps and is in contact with the other end of the first light emitting element. A third contact electrode overlaps and is in contact with the second electrode and the other end of the second light emitting element. The second contact electrode extends while detouring the third contact electrode.
    Type: Application
    Filed: September 15, 2020
    Publication date: August 12, 2021
    Inventors: Min Kyu WOO, Kyung Bae KIM, Jin Yeong KIM, Chong Chul CHAI
  • Publication number: 20210249576
    Abstract: A display device includes a substrate including a plurality of pixels; an electrode part including a first electrode in each pixel of the plurality of pixels on the substrate and a second electrode spaced apart from the first electrode on a same plane; a plurality of light emitting devices spaced apart from each other between the first electrode and the second electrode; a power line part including a first power line between the substrate and the first electrode, the first power line to receive a first driving power source, and a second power line between the substrate and the second electrode, the second power line to receive a second driving power source; and a shielding electrode line between the power line part and the first electrode, the shielding electrode line to receive the first driving power source.
    Type: Application
    Filed: April 26, 2021
    Publication date: August 12, 2021
    Applicant: Samsung Display Co., Ltd.
    Inventors: Kyung Bae KIM, Min Jae JEONG, Chong Chul CHAI
  • Patent number: 11081056
    Abstract: An organic light emitting display device includes a plurality of pixels. A pixel on an ith horizontal line includes a first transistor coupled between a first power source and a first node and having a gate electrode coupled to a second node. An organic light emitting diode is coupled between the first node and a second power source. A second transistor is coupled between the second and third nodes and is turned on when a first scan signal is supplied to an ith first scan line. A third transistor is coupled between the third and first nodes. A first capacitor is coupled between an ith control line and the second node. A second capacitor is coupled between the third node and a data line. The pixels are simultaneously driven during first, second, and third periods of a frame period and sequentially driven during a fourth period of the frame period.
    Type: Grant
    Filed: May 25, 2018
    Date of Patent: August 3, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD
    Inventors: Jun Hyun Park, Young Wan Seo, An Su Lee, Kang Moon Jo, Chong Chul Chai
  • 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: 11030952
    Abstract: A display panel driver drives pixels based on first power having at least three voltage levels, second power having a constant voltage, and third power having two voltage levels. Each pixel includes a first transistor connected between first and second nodes and including a gate electrode to receive a scan signal, a second transistor connected between the second node and a third node in series with the first transistor and including a gate electrode to receive the third power, and a driving transistor connected between a source of the first power and the third node and including a gate electrode connected to the first electrode to control a driving current for an organic light emitting diode. A first capacitor is connected between a source of the third power and the first node, and a second capacitor is connected between the second node and one of the data lines.
    Type: Grant
    Filed: January 6, 2020
    Date of Patent: June 8, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jun-Hyun Park, Young-Wan Seo, An-Su Lee, Bo-Yong Chung, Kang-Moon Jo, Chong-Chul Chai
  • Patent number: 11024227
    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: Grant
    Filed: December 10, 2019
    Date of Patent: June 1, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Chong Chul Chai, Dong Woo Kim, Kyoung Ju Shin, Bo Yong Chung
  • Publication number: 20210126079
    Abstract: An organic light emitting diode display includes a substrate, a semiconductor pattern disposed on the substrate, a first conductive layer disposed on the semiconductor pattern and including a first gate electrode having an island-shaped structure, a second gate electrode having an island-shaped structure, and a third gate electrode having an island-shaped structure, and a second conductive layer disposed on the first conductive layer and including a first initialization voltage line overlapping the first gate electrode, a scan line overlapping the second gate electrode, and a control signal line overlapping the third gate electrode, where the control signal line is electrically connected to the third gate electrode, the scan line is electrically connected to the second gate electrode, and the first initialization voltage line, the scan line, and the control signal line extend in a first direction.
    Type: Application
    Filed: August 10, 2020
    Publication date: April 29, 2021
    Inventors: Kang Moon JO, Chong Chul CHAI, Jun Hyun PARK, An Su LEE
  • Publication number: 20210125560
    Abstract: A pixel circuit includes a first switching element including a control electrode connected to a first node, an input electrode which receives a first power voltage and an output electrode connected to a third node, a second switching element including a control electrode which receives a compensation gate signal, an input electrode connected to a second node and an output electrode connected to the third node, a third switching element including a control electrode which receives a write gate signal, an input electrode connected to the first node and an output electrode connected to the second node, a storage capacitor including a first electrode which receives an initialization voltage and a second electrode connected to the first node, a program capacitor which receives a data voltage and connected to the second node, and an organic light emitting element connected to the third node and which receives a second power voltage.
    Type: Application
    Filed: October 5, 2020
    Publication date: April 29, 2021
    Inventors: Jun Hyun PARK, Chong Chul CHAI, Young Wan SEO, An Su LEE, Bo Yong CHUNG, Kang Moon JO
  • Patent number: 10991865
    Abstract: A display device includes a substrate including a plurality of pixels; an electrode part including a first electrode in each pixel of the plurality of pixels on the substrate and a second electrode spaced apart from the first electrode on a same plane; a plurality of light emitting devices spaced apart from each other between the first electrode and the second electrode; a power line part including a first power line between the substrate and the first electrode, the first power line to receive a first driving power source, and a second power line between the substrate and the second electrode, the second power line to receive a second driving power source; and a shielding electrode line between the power line part and the first electrode, the shielding electrode line to receive the first driving power source.
    Type: Grant
    Filed: August 22, 2019
    Date of Patent: April 27, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Kyung Bae Kim, Min Jae Jeong, Chong Chul Chai