Patents by Inventor Woo-Jin Cho

Woo-Jin Cho 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: 20250133877
    Abstract: A display device capable of minimizing restrictions on the selection of materials used in a bonding layer includes a substrate, a transistor disposed on the substrate, a planarization layer disposed on the transistor, a first electrode disposed on the planarization layer to be connected to the transistor, an intermediate layer disposed on the first electrode, a second electrode disposed on the intermediate layer, a reflective layer disposed in a trench of the planarization layer and separated from the first electrode and a bonding layer disposed between the inner wall of the trench and the reflective layer.
    Type: Application
    Filed: June 25, 2024
    Publication date: April 24, 2025
    Inventors: Young Rok KIM, Woo Jin CHO
  • Publication number: 20250109124
    Abstract: A compound of Chemical Formula 1: wherein X1 is O or S; any one of R1 to R6 is a moiety bonded to L1 of the following Chemical Formula A at **: Ar1 is the following Chemical Formula B: where X2 is O or S, and the other substituents are as described in the specification; and an organic light-emitting device including the same. When the compound of Chemical Formula 1 is included in an organic light-emitting device, the device exhibits lower driving voltage, improved light efficiency, and improved service life characteristics.
    Type: Application
    Filed: December 6, 2022
    Publication date: April 3, 2025
    Inventors: Jae Seung HA, Sujeong GEUM, Seonwoo KIM, Woochul LEE, Woo Jin CHO, Yongbum CHA
  • Patent number: 12265044
    Abstract: The present invention relates to a method for detecting a void in a concrete composite member covered with a steel plate using a thermal image, and a method for managing the construction of a concrete composite member covered with a steel plate by applying same. According to the present invention, since the presence of the void is determined based on the steel plate surface temperature measured using the thermal image during the construction of the concrete composite member covered with the steel plate, the void generation may be precisely expected.
    Type: Grant
    Filed: June 17, 2020
    Date of Patent: April 1, 2025
    Assignees: SAMSUNG C & T CORPORATION, KOREA HYDRO & NUCLEAR POWER CO., LTD.
    Inventors: Kyung Hun Woo, Woo Jin Cho, Jae Bog Lee, Sang Joon Park, Ji Yong Yu, Tae Ha Park, Hyun Il Park, Chang Gook Song, Jhin Woo Shin
  • Publication number: 20250089536
    Abstract: Provided is a display device comprising an interlayer insulating layer on a substrate and having a first trench and a second trench, a first reflective electrode inside the first trench, a second reflective electrode inside the second trench, a first-first electrode on the interlayer insulating layer and connected to the first reflective electrode, a first-second electrode on the interlayer insulating layer and connected to the second reflective electrode, a second electrode on the first-first electrode and the first-second electrode, a first color filter on the second electrode to overlap the first-first electrode, and a second color filter on the second electrode to overlap the first-second electrode, wherein the interlayer insulating layer includes insulating layers, at least two of the insulating layers contain different materials, and at least one of the first trench or the second trench penetrates the insulating layers containing different materials of the interlayer insulating layer.
    Type: Application
    Filed: May 13, 2024
    Publication date: March 13, 2025
    Inventors: Young Rok KIM, Woo Jin CHO
  • Patent number: 12225809
    Abstract: The present disclosure is directed to a coating composition including a graphene oxide and a solvent. At least one of a carboxyl group and an epoxide group of the graphene oxide is functionalized by an amine. The amine has an activation energy to an epoxide group of the graphene oxide of about ?3 kcal/mol to about 8 kcal/mol. A method of forming a stacked structure using the coating composition is provided. A method of manufacturing a display device using the coating composition is provided.
    Type: Grant
    Filed: September 23, 2020
    Date of Patent: February 11, 2025
    Assignees: SAMSUNG DISPLAY CO., LTD., DONGJIN SEMICHEM CO., LTD.
    Inventors: Hee Kyun Shin, Dong Kyun Seo, Jun Ho Sim, Woo Jin Cho, Byung Hoon Kang, Seung Jun Moon, Sun Chan Park, Hee Won Seo, Ji Eun Cho, Kyu Soon Shin
  • Publication number: 20250040360
    Abstract: A display device includes: a substrate; a thin film transistor positioned on the substrate and including a source electrode, a drain electrode, and an active layer positioned between the source electrode and the drain electrode; a gate electrode positioned on the thin film transistor and overlapping the active layer in a plan view; a gate protection layer positioned on the gate electrode and overlapping the active layer in the plan view; an insulating layer positioned on the gate protection layer; and a gate cover layer positioned between side surfaces of the gate electrode and the insulating layer, where the gate cover layer includes a first portion and a second portion spaced apart from the first portion with the gate electrode interposed therebetween, and the first portion and the second portion are in contact with the gate protection layer.
    Type: Application
    Filed: April 11, 2024
    Publication date: January 30, 2025
    Inventors: Hee Sung YANG, Su Kyeong SHIN, Woo Jin CHO, Sang Gab KIM, Joon Hwa BAE
  • Publication number: 20240349607
    Abstract: A compound of Chemical Formula 1: wherein X1 is O or S; any one of R1 to R5 is a moiety bonded to L1 of the following Chemical Formula A at **: Ar1 is a substituted or unsubstituted aryl group, Chemical Formula 1 comprises at least one deuterium, and the other substituents are as defined in the specification; and an organic light-emitting device including the same. When a compound of Chemical Formula 1 is included in an organic light emitting device, the device exhibits lower driving voltage, improved light efficiency, and improved service life characteristics.
    Type: Application
    Filed: June 24, 2024
    Publication date: October 17, 2024
    Inventors: Jae Seung HA, Sujeong Geum, Seonwoo Kim, Woochul Lee, Woo Jin Cho, Yongbum Cha
  • Patent number: 12069944
    Abstract: An organic light emitting device including a first electrode; a second electrode provided to face the first electrode; and an organic material layer having one, two or more layers provided between the first electrode and the second electrode, wherein the organic material layer includes a first organic material layer including a compound of Chemical Formula 1 and a second organic material layer including a compound of Chemical Formula 2.
    Type: Grant
    Filed: January 14, 2020
    Date of Patent: August 20, 2024
    Assignee: LG Chem, Ltd.
    Inventors: Sung Jae Lee, Sung Kil Hong, Yongbum Cha, Woo Jin Cho, Joo Yong Yoon, Hyeon Jin Mun
  • Publication number: 20240251607
    Abstract: A display device according to an embodiment includes: a substrate; a transistor that is disposed on the substrate; a light emitting diode that is disposed on the substrate, and connected to the transistor; and a passivation layer that is disposed between the transistor and the light emitting diode, wherein a surface step of the passivation layer is within a range of and including 1 nm to 30 nm.
    Type: Application
    Filed: April 5, 2024
    Publication date: July 25, 2024
    Inventors: Byoung Kwon CHOO, Seung Bae KANG, Bong Gu KANG, Tae Joon KIM, Jeong Min PARK, Joon-Hwa BAE, Hee Sung YANG, Woo Jin CHO
  • Patent number: 11985865
    Abstract: A display device according to an embodiment includes: a substrate; a transistor that is disposed on the substrate; a light emitting diode that is disposed on the substrate, and connected to the transistor; and a passivation layer that is disposed between the transistor and the light emitting diode, wherein a surface step of the passivation layer is within a range of and including 1 nm to 30 nm.
    Type: Grant
    Filed: May 27, 2021
    Date of Patent: May 14, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Byoung Kwon Choo, Seung Bae Kang, Bong Gu Kang, Tae Joon Kim, Jeong Min Park, Joon-Hwa Bae, Hee Sung Yang, Woo Jin Cho
  • Patent number: 11919122
    Abstract: A substrate processing apparatus includes: a conveyor belt configured to have an outer surface on which a bottom surface of a substrate is seated; and a polishing head unit configured to face an upper surface of the substrate, wherein the polishing head unit includes: a polishing head connected to a driver; a polishing pad configured to face the polishing head; a polishing pad fixing ring disposed between the polishing head and the polishing pad; and a temperature sensor configured to overlap the polishing pad fixing ring and to be spaced apart from the polishing pad fixing ring.
    Type: Grant
    Filed: September 29, 2020
    Date of Patent: March 5, 2024
    Assignees: SAMSUNG DISPLAY CO., LTD., KCTECH CO., LTD.
    Inventors: Seung Bae Kang, Sung Hyeon Park, Jung Gun Nam, Joon-Hwa Bae, Kyung Bo Lee, Keun Woo Lee, Woo Jin Cho, Byoung Kwon Choo
  • Patent number: 11832503
    Abstract: A display device includes a base, a light emitting device on a first surface of the base, and a plate-like inorganic layer on a second surface of the base, the plate-like inorganic layer including a first plate-like inorganic particle with a first size and a second plate-like inorganic particle with a second size different from the first size.
    Type: Grant
    Filed: January 15, 2021
    Date of Patent: November 28, 2023
    Assignee: SAMSUNG DISPLAY CO. LTD.
    Inventors: Hee Kyun Shin, Seung Jun Moon, Byung Hoon Kang, Min Woo Lee, Woo Jin Cho
  • Publication number: 20230295503
    Abstract: Embodiments provide an etchant composition that includes about 5.0 to about 20.0 wt % of a persulfate, about 0.01 to about 15.0 wt % of a sulfonic acid, about 0.01 to about 2.0 wt % of a fluorine compound, about 0.01 to about 5.0 wt % of a 4-nitrogen cyclic compound, about 0.01 to about 1.0 wt % of an amino acid including a hydrophobic group having at least two carbon atoms, and water A weight ratio of the amino acid to the 4-nitrogen cyclic compound is in a range of about 1:16 to about 1:60.
    Type: Application
    Filed: March 16, 2023
    Publication date: September 21, 2023
    Applicant: Samsung Display Co., LTD.
    Inventors: YOUNGROK KIM, KYU-SOON PARK, Jong-Hyun CHOUNG, Woo Jin CHO, Gyu Po KIM, SUNG MIN KIM, Jae Myeong KIM, Hyun Cheol SHIN, JUN DONG KIM, JUN YOUNG HAWNG
  • Publication number: 20230292550
    Abstract: A display device includes: a substrate; a thin-film transistor disposed on the substrate and including a semiconductor layer; an interlayer insulating layer disposed on the thin-film transistor; a data conductive layer disposed on the interlayer insulating layer and including an auxiliary electrode and a transistor electrode connected to the semiconductor layer of the thin-film transistor, a via layer disposed on the data conductive layer; a pixel electrode layer disposed on the via layer and including: a pixel electrode and a dummy pixel electrode separated from the pixel electrode; an intermediate layer disposed on the pixel electrode layer; and a common electrode disposed on the intermediate layer. The auxiliary electrode includes a main conductive layer and an upper sub-conductive layer. Side surfaces of the main conductive layer of the auxiliary electrode are disposed inner than side surfaces of the upper sub-conductive layer of the auxiliary electrode.
    Type: Application
    Filed: October 28, 2022
    Publication date: September 14, 2023
    Applicant: Samsung Display Co., LTD.
    Inventors: Hyoung Sik KIM, Jong Hee PARK, Hong Sick PARK, Woo Jin CHO
  • Publication number: 20230268356
    Abstract: A method of manufacturing a display device in a chamber in which a material including yttrium is coated on an inner surface includes: forming a first layer pattern by dry etching on a substrate; depositing a second layer material on the first layer pattern; forming a photoresist pattern on the second layer material; completing a second layer pattern by using the photoresist pattern as an etch mask; and performing an additional acid etching process by using an etching solution including at least one of hydrochloric acid, sulfuric acid, or nitric acid before the forming of the photoresist pattern on the second layer material after the dry etching to form the first layer pattern.
    Type: Application
    Filed: January 18, 2023
    Publication date: August 24, 2023
    Inventors: Yong-Hwan RYU, Woo Jin CHO, Jong-Hyun CHOUNG, Jae Uoon KIM, Sun-Jin SONG, Hyun Duck CHO
  • Publication number: 20230197901
    Abstract: A display device comprises a via layer disposed on a substrate, a first electrode and a second electrode disposed on the via layer and spaced apart from each other, a first insulating layer disposed on the first electrode and the second electrode, light emitting elements disposed on the first insulating layer and disposed on the first electrode and the second electrode, a bank layer disposed on the first insulating layer and comprising a first opening in which the light emitting elements are disposed and a second opening spaced apart from the first opening, a second insulating layer disposed on the light emitting elements, and a first contact electrode and a second contact electrode disposed on the bank layer, the light emitting elements, and the second insulating layer while being spaced apart from each other.
    Type: Application
    Filed: August 5, 2022
    Publication date: June 22, 2023
    Applicant: Samsung Display Co., LTD.
    Inventors: Young Rok KIM, Kyu Soon PARK, Jong Hyun CHOUNG, Woo Jin CHO
  • Patent number: 11594561
    Abstract: A method of manufacturing a display device in a chamber in which a material including yttrium is coated on an inner surface includes: forming a first layer pattern by dry etching on a substrate; depositing a second layer material on the first layer pattern; forming a photoresist pattern on the second layer material; completing a second layer pattern by using the photoresist pattern as an etch mask; and performing an additional acid etching process by using an etching solution including at least one of hydrochloric acid, sulfuric acid, or nitric acid before the forming of the photoresist pattern on the second layer material after the dry etching to form the first layer pattern.
    Type: Grant
    Filed: October 20, 2020
    Date of Patent: February 28, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Yong-Hwan Ryu, Woo Jin Cho, Jong-Hyun Choung, Jae Uoon Kim, Sun-Jin Song, Hyun Duck Cho
  • Publication number: 20220393111
    Abstract: Provided is an organic light emitting device including: a cathode; an anode facing the cathode; a light emitting layer between the cathode and the anode and comprising a host and a dopant; a hole transport region between the anode and the light emitting layer; and an electron transport region between the cathode and the light emitting layer, wherein the hole transport region includes and an organic material layer comprising a compound of Chemical Formula 1, and the dopant comprises a compound of Chemical Formula 2: wherein: Ar1 to Ar6 are each independently a substituted or unsubstituted: C6-60 aryl group or C2-60 heterocyclic group, or are bonded to an adjacent substituent to form a substituted or unsubstituted ring; Cy is a substituted or unsubstituted: aliphatic hydrocarbon ring, aromatic ring, or hetero ring, or a substituted or unsubstituted ring in which these rings are fused.
    Type: Application
    Filed: November 30, 2020
    Publication date: December 8, 2022
    Inventors: Woo Jin CHO, Moung Gon KIM, Sung Kil HONG, Dongheon KIM, Sujeong GEUM
  • Publication number: 20220384748
    Abstract: A method for manufacturing a display apparatus according to an embodiment includes: preparing a carrier substrate and forming a sacrificial layer on a top surface of the carrier substrate, where the sacrificial layer includes a cover area and an exposure area located on at least one side of the cover area; forming a first flexible material having a bottom surface in contact with the sacrificial layer on a top surface of the cover area of the sacrificial layer to expose the exposure area of the sacrificial layer; and removing the exposure area of the sacrificial layer.
    Type: Application
    Filed: February 14, 2020
    Publication date: December 1, 2022
    Inventors: Hyun Seok KIM, Hee Kyun SHIN, Jun Ho SIM, Tae Wook KANG, Woo Jin CHO
  • Patent number: 11505624
    Abstract: The present invention relates to a rubber composition having excellent tensile properties and viscoelasticity properties and including a modified conjugated diene-based polymer. The rubber composition may include a modified conjugated diene-based polymer which is selected considering target tensile properties and viscoelasticity properties, by predicting in advance the correlation of the modification ratio of the modified conjugated diene-based polymer and the dynamic viscoelasticity loss coefficient at 60° C. of the rubber composition through Mathematical Formula 1 and Mathematical Formula 2. Therefore, excellent compounding properties may be shown.
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: November 22, 2022
    Inventors: Jin Sook Ryu, Kyoung Hwan Oh, Woo Jin Cho, Suk Youn Kang, Sung Joon Oh, Sun Ok Oh