Patents by Inventor Cheol-Wan Park

Cheol-Wan Park 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: 11508795
    Abstract: A display device includes a display panel having a general area including first subpixels, and a sensor area including second subpixels and light-transmitting area. Each of the first subpixels and the second subpixels includes a first active layer disposed on a substrate and formed of a first material, a first gate layer disposed on the first active layer, a second gate layer disposed on the first gate layer, a second active layer disposed on the second gate layer and formed of a second material different from the first material, a third gate layer disposed on the second active layer, and a light-blocking layer disposed between the substrate and the first active layer and overlapping the second active layer in a thickness direction.
    Type: Grant
    Filed: December 31, 2020
    Date of Patent: November 22, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jun Hyun Park, Hyeong Seok Kim, Young Wan Seo, Yu Jin Lee, Cheol Gon Lee
  • Publication number: 20220214531
    Abstract: A laser crystallization apparatus according to an embodiment includes: a light source unit which irradiates a laser beam; and a path conversion unit which converts the laser beam incident from the light source unit into a linear beam having a long axis parallel to a first direction and a short axis parallel to a second direction. The linear beam propagates in a third direction perpendicular to the first direction and the second direction, the path conversion unit includes an incident window extending parallel to a first length direction, an emission window extending parallel to a second direction, a first reflection unit disposed at the same side with the incident window, and a second reflection unit disposed at the same side with the emission window, and the second length direction extends parallel to the first direction in a view of the third direction.
    Type: Application
    Filed: October 25, 2021
    Publication date: July 7, 2022
    Inventors: Akifumi SANGU, Je Kil RYU, Cheol Ho PARK, Hae Sook LEE, Jin Hong JEUN, Young Su CHAE, Gyoo Wan HAN
  • Publication number: 20220212291
    Abstract: A laser crystallization apparatus according to an embodiment includes a light source unit irradiating a laser beam; and an optical unit to which the laser beam is incident, wherein the optical unit includes a first portion and a second portion bonded to each other on a bonded surface, and a first width of the first portion and a second width of the second portion are the same as each other on the bonded surface based on a direction parallel to the incident direction of the laser beam.
    Type: Application
    Filed: October 18, 2021
    Publication date: July 7, 2022
    Inventors: Akifumi Sangu, Je Kil Ryu, Cheol Ho Park, Hae Sook Lee, Jin Hong Jeun, Young Su Chae, Gyoo Wan Han
  • Patent number: 10958182
    Abstract: A transformer and an LLC resonant converter are provided. The transformer includes first and second cores configured to include a pair of outer foots and a middle foot positioned between the outer foots, and to induce a magnetic field formation; first and second inductor winding parts configured to include a conductor surrounding a circumference of each of the pair of outer foots of the first core, and to be connected in series with each other; and first and second transformer winding parts configured to include a conductor surrounding a circumference of each of the pair of outer foots of the second core, wherein the pair of outer foots of the first core face the pair of outer foots of the second core, the middle foot of the first core faces the middle foot of the second core, and the first core and the second core are disposed to be spaced apart from each other.
    Type: Grant
    Filed: December 31, 2019
    Date of Patent: March 23, 2021
    Assignee: SOLUM CO., LTD.
    Inventors: Sang-keun Ji, Sang-kyoo Han, Cheol-wan Park, Dong-kyun Ryu, Heung-gyoon Choi
  • Publication number: 20200136518
    Abstract: A transformer and an LLC resonant converter are provided. The transformer includes first and second cores configured to include a pair of outer foots and a middle foot positioned between the outer foots, and to induce a magnetic field formation; first and second inductor winding parts configured to include a conductor surrounding a circumference of each of the pair of outer foots of the first core, and to be connected in series with each other; and first and second transformer winding parts configured to include a conductor surrounding a circumference of each of the pair of outer foots of the second core, wherein the pair of outer foots of the first core face the pair of outer foots of the second core, the middle foot of the first core faces the middle foot of the second core, and the first core and the second core are disposed to be spaced apart from each other.
    Type: Application
    Filed: December 31, 2019
    Publication date: April 30, 2020
    Inventors: Sang-keun JI, Sang-kyoo HAN, Cheol-wan PARK, Dong-kyun RYU, Heung-gyoon CHOI
  • Patent number: 10630191
    Abstract: A transformer and an LLC resonant converter are provided. The transformer includes first and second cores configured to include a pair of outer foots and a middle foot positioned between the outer foots, and to induce a magnetic field formation; first and second inductor winding parts configured to include a conductor surrounding a circumference of each of the pair of outer foots of the first core, and to be connected in series with each other; and first and second transformer winding parts configured to include a conductor surrounding a circumference of each of the pair of outer foots of the second core, wherein the pair of outer foots of the first core face the pair of outer foots of the second core, the middle foot of the first core faces the middle foot of the second core, and the first core and the second core are disposed to be spaced apart from each other.
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: April 21, 2020
    Assignee: SOLUM CO., LTD.
    Inventors: Sang-keun Ji, Sang-kyoo Han, Cheol-wan Park, Dong-kyun Ryu, Heung-gyoon Choi
  • Publication number: 20180342953
    Abstract: A transformer and an LLC resonant converter are provided. The transformer includes first and second cores configured to include a pair of outer foots and a middle foot positioned between the outer foots, and to induce a magnetic field formation; first and second inductor winding parts configured to include a conductor surrounding a circumference of each of the pair of outer foots of the first core, and to be connected in series with each other; and first and second transformer winding parts configured to include a conductor surrounding a circumference of each of the pair of outer foots of the second core, wherein the pair of outer foots of the first core face the pair of outer foots of the second core, the middle foot of the first core faces the middle foot of the second core, and the first core and the second core are disposed to be spaced apart from each other.
    Type: Application
    Filed: May 4, 2018
    Publication date: November 29, 2018
    Inventors: Sang-keun JI, Sang-kyoo HAN, Cheol-wan PARK, Dong-kyun RYU, Heung-gyoon CHOI
  • Patent number: 7749655
    Abstract: An anode active material for a lithium secondary battery, wherein a nitride compound containing silicon or metal such as copper, tin, germanium, indium and zinc is doped with second metal such as ferrum, cobalt, nickel and copper. To obtain the anode active material, a predetermined amount of metal nitride or silicon nitride is added to a second metal powder and then mixed uniformly. The mixture powder is filled into a container, and then a pressure is applied thereto to obtain a solid sample. The solid sample is heat-treated and pulverized into fine powder. The fine powder is heat-treated to obtain the metal nitride or the silicon nitride doped with the second metal.
    Type: Grant
    Filed: June 21, 2005
    Date of Patent: July 6, 2010
    Assignee: Korea Electro Technology Research Institute
    Inventors: Chil-Hoon Doh, Cheol-Wan Park, Seong-In Moon, Bong-Soo Jin, Mun-Soo Yun, Kallaiselvi Nallathamby
  • Publication number: 20050282070
    Abstract: An anode active material for a lithium secondary battery, wherein a nitride compound containing silicon or metal such as copper, tin, germanium, indium and zinc is doped with second metal such as ferrum, cobalt, nickel and copper. To obtain the anode active material, a predetermined amount of metal nitride or silicon nitride is added to a second metal powder and then mixed uniformly. The mixture powder is filled into a container, and then a pressure is applied thereto to obtain a solid sample. The solid sample is heat-treated and pulverized into fine powder. The fine powder is heat-treated to obtain the metal nitride or the silicon nitride doped with the second metal.
    Type: Application
    Filed: June 21, 2005
    Publication date: December 22, 2005
    Inventors: Chil-Hoon Doh, Cheol-Wan Park, Seong-In Moon, Bong-Soo Jin, Mun-Soo Yun, Kallaiselvi Nallathamby