Patents by Inventor Keun-Chan Oh

Keun-Chan Oh 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: 20200258945
    Abstract: A color conversion substrate includes a base on which first to third light outputting regions and a light shielding region surrounding the first to third light outputting regions are defined; first to third color filters on the base in the first to third light outputting regions, respectively; a first light shielding member on the first color filter in the light shielding region; a light transmission pattern on the first color filter; a first wavelength conversion pattern on the second color filter and which converts light of a first color into light of a second color; and a second wavelength conversion pattern on the third color filter and which converts the light of the first color into light of a third color. A first opening located in the light shielding region is defined in at least one of the light transmission pattern and the first and second wavelength conversion patterns.
    Type: Application
    Filed: October 3, 2019
    Publication date: August 13, 2020
    Inventors: Sun Kyu JOO, Byung Chul KIM, In Ok KIM, Jae Min SEONG, In Seok SONG, Keun Chan OH, Gak Seok LEE, Ji Eun JANG, Chang Soon JANG
  • Patent number: 10723949
    Abstract: Disclosed is a liquid crystal composition including at least one compound selected from the group consisting of a liquid crystal compound expressed by Formula 1-1 and a liquid crystal compound expressed by Formula 1-2; at least one compound selected from the group consisting of a self-alignment compound expressed by Formula 2-1 and a self-alignment compound expressed by Formula 2-2; and at least one compound selected from the group consisting of a reactive mesogen expressed by Formula 3-1, a reactive mesogen expressed by Formula 3-2, a reactive mesogen expressed by Formula 3-3, a reactive mesogen expressed by Formula 3-4, and a reactive mesogen expressed by Formula 3-5. The liquid crystal composition also has negative dielectric anisotropy.
    Type: Grant
    Filed: October 22, 2018
    Date of Patent: July 28, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sun Young Kwon, Min-Hee Kim, Ji Eun Jang, Il Joon Kang, Jong Ho Son, Keun Chan Oh, Chang-Hun Lee
  • Patent number: 10725340
    Abstract: A quantum dot, a color conversion panel, and a display device, the quantum dot including a core; and a shell layer positioned outside of the core, wherein at least one of the core and the shell layer is doped with aluminum, silicon, titanium, magnesium, or zinc, and the core includes a Group III-V compound.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: July 28, 2020
    Assignees: Samsung Display Co., Ltd., Korea Advanced Institute of Science and Technology
    Inventors: Kyoung Won Park, Baek Hee Lee, Min Ki Nam, Hyeok Jin Lee, Keun Chan Oh, Jae Jin Lyu, Baek Kyun Jeon, Sungjun Koh, Doh Chang Lee
  • Patent number: 10678091
    Abstract: Provided are a wavelength conversion layer and a display device. A color conversion element comprises: a wavelength conversion layer; one or more low refractive layers which are disposed on and/or under the wavelength conversion layer and have a lower refractive index than the wavelength conversion layer; and one or more capping layers which are disposed between the wavelength conversion layer and the low refractive layers and/or on a surface opposite to a surface of each of the low refractive layers which faces the wavelength conversion layer.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: June 9, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Taek Joon Lee, Young Gu Kim, Keun Chan Oh, Sun Young Chang, Hye Lim Jang, Baek Kyun Jeon, Jin Soo Jung, Kyung Seon Tak, Jae Jin Lyu, Moon Jung Baek
  • Patent number: 10647918
    Abstract: A liquid crystal composition includes: at least one liquid crystal compound selected from the group consisting of Chemical Formulas 1-1 to 1-8; at least one self-aligned compound selected from the group consisting of Chemical Formulas 2-1 and 2-2; and at least one reactive mesogen selected from the group consisting of Chemical Formulas 3-1 to 3-5. Compositions and devices constructed therewith are capable of ameliorating liquid crystal drip spots that typically occur in a manufacturing process. In addition, the display devices using the composition do not require an additional alignment layer, which simplifies manufacturing.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: May 12, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ji Eun Jang, Sun Young Kwon, Min-Hee Kim, Jong Ho Son, Keun Chan Oh, Chang-Hun Lee
  • Patent number: 10640708
    Abstract: A liquid crystal composition, comprising, at least one compound represented by Formula 1-A: wherein, in the Formula 1-A, R—*, R1—*, Q-*, *—Z1-*, *—Z2-*, n1, n2, n3, n4, L1-*, L2-*, L3-*, L4-*, L5-*, L6-*, L7-*, and L8-* are the same as defined in the specification, and * is defined as a bonding site to a neighboring atom.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: May 5, 2020
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ji Hong Bae, Keun Chan Oh, Seul Gee Lee
  • Patent number: 10535315
    Abstract: A display device including a liquid crystal panel assembly including a plurality of pixels, a data driver applying a data voltage to a plurality of data lines which is connected to the plurality of pixels, and a common voltage generator providing a common voltage to the liquid crystal panel assembly, in which the common voltage is an optimal common voltage for a maximum grayscale at which a flicker is minimized while a data voltage with a maximum grayscale is applied to the plurality of pixels.
    Type: Grant
    Filed: August 7, 2018
    Date of Patent: January 14, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Joon-Hyung Park, Sun Young Kwon, Min-Hee Kim, Ji Hong Bae, Jong Ho Son, Keun Chan Oh, Kyung Hee Lee, Kang Seob Jeong, Kyung Seon Tak
  • Patent number: 10509283
    Abstract: Provided is a display device. The display device includes a first substrate and a second substrate including a display area and a non-display area surrounding the display area. The first substrate and the second substrate face and are attached to each other. A first polarizer is disposed on the display area of the first substrate. A second polarizer is entirely disposed on the display area and the non-display area of the second substrate and has a non-overlapping region which does not overlap the first polarizer in the non-display area. A light leakage prevention pattern is disposed between the first substrate and the second substrate in the non-overlapping region of the first polarizer and the second polarizer and includes a color filter pattern and a light blocking pattern which overlap each other.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: December 17, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jun Woo Lee, Keun Chan Oh, Woo Suk Jung, Yi Seop Shim, Sun Kyu Joo
  • Patent number: 10502990
    Abstract: A liquid crystal display (LCD) includes: a first pixel configured to emit first light having a first wavelength; a second pixel configured to emit second light having a second wavelength longer than the first wavelength; a third pixel configured to emit third light having a third wavelength longer than the second wavelength; and a liquid crystal (LC) panel in which driving voltages for maximum transmittances for the first light, the second light, and the third light are different from each other. The LCD is configured to apply different voltages to pixel electrodes of the first pixel, the second pixel, and the third pixel, respectively, such that the first light, the second light, and the third light respectively emitted by the first pixel, the second pixel, and the third pixel are transmitted at the respective maximum transmittances.
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: December 10, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jong Ho Son, Keun Chan Oh, Min-Hee Kim, Kyung Seon Tak, Joon-Hyung Park, Kang Seob Jeong
  • Publication number: 20190348484
    Abstract: A display device includes a substrate, a thin film transistor provided on the substrate, a first electrode connected to the thin film transistor, a second electrode overlapping the first electrode, and a partition wall and a light-emitting device layer provided between the first electrode and the second electrode. The partition wall may include a main chain and a side chain connected to the main chain, and a carbon number of the side chain may be equal to or greater than 14.
    Type: Application
    Filed: May 13, 2019
    Publication date: November 14, 2019
    Inventors: Suk Hoon KANG, Hoi-Lim KIM, Min-Jae KIM, Beom-Soo SHIN, Keun Chan OH, Hong Yeon LEE
  • Patent number: 10473982
    Abstract: A liquid crystal display including a first substrate, a second substrate disposed opposite the first substrate, and a liquid crystal layer disposed between the first substrate and the second substrate. The liquid crystal layer includes a liquid crystal composition. The liquid crystal composition includes at least one of liquid crystal compounds including a cyclopentadienyl group.
    Type: Grant
    Filed: April 14, 2017
    Date of Patent: November 12, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Sun Young Kwon, Tae Hoon Kim, Ji Hong Bae, Jong Ho Son, Keun Chan Oh, Gak Seok Lee, Chang Hun Lee, Ji Eun Jang
  • Patent number: 10459277
    Abstract: A display device includes a base portion including a pixel area including a light-transmitting area and a light-blocking area; a projection portion disposed on the light-blocking area of the base portion and including a first sub-color filter and a second sub-color filter overlapping over an overlap area; a light-blocking member disposed on the projection portion and overlapping the base portion; and a spacing member disposed on the light-blocking member, made of the same material as the light-blocking member and overlapping the projection portion.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: October 29, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sun Kyu Joo, Su Jeong Kim, Jang Wi Ryu, Yi Seop Shim, Keun Chan Oh, Jae Jin Lyu, Jun Woo Lee, Chang Soon Jang, Young Bong Cho, Chul Huh
  • Publication number: 20190326545
    Abstract: An organic light emitting display device includes: a first substrate; a plurality of pixels on the first substrate, each of the pixels including a corresponding portion of an organic light emitting layer on the first substrate; an encapsulation film on the organic light emitting layer; a protruding pattern layer on the encapsulation film and comprising a plurality of spacers at a boundary between adjacent ones of the pixels; an adhesive layer on the protruding pattern layer; and a second substrate on the adhesive layer.
    Type: Application
    Filed: February 14, 2019
    Publication date: October 24, 2019
    Inventors: Sun Kyu JOO, Byung Chul KIM, In Ok KIM, Keun Chan OH, Chang Soon JANG, In Seok SONG, Gak Seok LEE
  • Publication number: 20190280061
    Abstract: A display device includes a substrate, a thin film transistor on the substrate, an interlayer insulating layer on the thin film transistor, an electrode on the interlayer insulating layer, the electrode including an emission region, a contact region overlapping the thin film transistor, and a dummy region protruding from the emission region in a direction different from the contact region, and an emission layer on the electrode, the emission region of the electrode overlapping the emission layer.
    Type: Application
    Filed: December 11, 2018
    Publication date: September 12, 2019
    Inventors: Sun-Kyu JOO, In Seok SONG, Keun Chan OH, Byung-Chul KIM, In Ok KIM, Gak Seok LEE, Chang-Soon JANG
  • Publication number: 20190250440
    Abstract: A display device includes a first base substrate including a display area and a peripheral area around the display area; a voltage line disposed on the peripheral area of the first base substrate; a protrusion disposed on the voltage line and including a first pattern containing a first color material and a second pattern containing a second color material different from the first color material; a connection electrode disposed on the protrusion and connected with the voltage line; and a light-blocking pattern disposed on the connection electrode and provided with an opening for partially exposing the connection electrode, wherein the protrusion includes a multilayer portion where the first pattern and the second pattern overlap each other and a single-layer portion where the first pattern and the second pattern do not overlap each other, and a lateral surface of the light-blocking pattern, defining the opening, overlaps the single-layer portion.
    Type: Application
    Filed: April 22, 2019
    Publication date: August 15, 2019
    Inventors: Sun Kyu JOO, Keun Chan OH, Jun Woo LEE, Yun Ho LEE
  • Patent number: 10373978
    Abstract: A light emitting display device according to an exemplary embodiment of the present disclosure includes: a first substrate; an insulating layer disposed on the first substrate and having an inclined portion; a first electrode disposed on the insulating layer; a light-emitting layer disposed on the first electrode; a second electrode disposed on the light-emitting layer; and a plurality of color conversion layers disposed on the second electrode. The first electrode includes an inclined portion that is inclined along the inclined portion of the insulating layer based on a surface parallel to the first substrate, and the light-emitting layer includes semiconductor nano-particles.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: August 6, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Baek Hee Lee, Keun Chan Oh, Jae Jin Lyu, Hyeok Jin Lee
  • Publication number: 20190219875
    Abstract: A display device and a method of manufacturing a display device are provided. The display device includes: a base substrate; a color conversion pattern disposed on the base substrate; and a low refractive layer disposed on the base substrate, stacked with the color conversion pattern, and having a lower refractive index than the color conversion pattern. The low refractive layer includes a first base resin and particle clusters dispersed in the first base resin, and the particle clusters include a plurality of particles and bridges that combine the particles.
    Type: Application
    Filed: September 7, 2018
    Publication date: July 18, 2019
    Inventors: Jin Soo Jung, Young Gu Kim, Taek Joon Lee, Keun Chan Oh, Sun Young Chang, Hye Lim Jang, Baek Kyun Jeon, Kyung Seon Tak
  • Patent number: 10317742
    Abstract: A display device includes a first base substrate including a display area and a peripheral area around the display area; a voltage line disposed on the peripheral area of the first base substrate; a protrusion disposed on the voltage line and including a first pattern containing a first color material and a second pattern containing a second color material different from the first color material; a connection electrode disposed on the protrusion and connected with the voltage line; and a light-blocking pattern disposed on the connection electrode and provided with an opening for partially exposing the connection electrode, wherein the protrusion includes a multilayer portion where the first pattern and the second pattern overlap each other and a single-layer portion where the first pattern and the second pattern do not overlap each other, and a lateral surface of the light-blocking pattern, defining the opening, overlaps the single-layer portion.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: June 11, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sun Kyu Joo, Keun Chan Oh, Jun Woo Lee, Yun Ho Lee
  • Publication number: 20190155110
    Abstract: A liquid crystal display device and a method of manufacturing a liquid crystal display device are provided. The liquid crystal display device includes: a base; an alignment inducing layer on the base and including a first compound represented by formula A1 or a polymer of the first compound; and a liquid crystal layer on the alignment inducing layer that includes liquid crystals: where R1 may be hydrogen or a polymerizable group, R2 may be a hydrophilic group, SP1 and SP2 may each independently be a single bond, a C1-C12 alkylene group, or a C1-C12 alkoxylene group, Z may be a single bond, an ester group, or an ether group, and X1, X2 and X3 may each independently be hydrogen, a methyl group, fluorine, or chlorine.
    Type: Application
    Filed: September 26, 2018
    Publication date: May 23, 2019
    Inventors: Ho Lim, Shin Woong Kang, Keun Chan Oh, Jae Jin Lyu, Aboozar Nasrollahi, Vineet Kumar
  • Publication number: 20190119572
    Abstract: Disclosed is a liquid crystal composition including at least one compound selected from the group consisting of a liquid crystal compound expressed by Formula 1-1 and a liquid crystal compound expressed by Formula 1-2; at least one compound selected from the group consisting of a self-alignment compound expressed by Formula 2-1 and a self-alignment compound expressed by Formula 2-2; and at least one compound selected from the group consisting of a reactive mesogen expressed by Formula 3-1, a reactive mesogen expressed by Formula 3-2, a reactive mesogen expressed by Formula 3-3, a reactive mesogen expressed by Formula 3-4, and a reactive mesogen expressed by Formula 3-5. The liquid crystal composition also has negative dielectric anisotropy.
    Type: Application
    Filed: October 22, 2018
    Publication date: April 25, 2019
    Inventors: Sun Young Kwon, Min-Hee Kim, Ji Eun Jang, Il Joon Kang, Jong Ho Son, Keun Chan Oh, Chang-Hun Lee