Patents by Inventor Yong-Hwa Jung

Yong-Hwa Jung 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: 12248149
    Abstract: An optical apparatus includes a lens including a first surface and a plurality of side surfaces, a display device disposed on a first side surface among the plurality of side surfaces of the lens and providing light to the first side surface of the lens, an optical path control device disposed between the first side surface of the lens and the display device and selectively changing an optical path of a virtual image of the display device, and a plurality of reflecting members disposed in the lens and reflecting light of the display device to the first surface.
    Type: Grant
    Filed: July 17, 2020
    Date of Patent: March 11, 2025
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Su Bin Jung, Soo Min Baek, Ju Hwa Ha, Jae Joong Kwon, Yong Seok Kim, Jeong Woo Park
  • Publication number: 20250067962
    Abstract: An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens sequentially disposed from the first lens to the fifth lens from an object-side of the imaging system to an image-side of the imaging system and each having refractive power. The fourth lens has a convex object-side surface and an expression 0.7<TL/f<1.0 is satisfied, where TL is a distance from an object-side surface of the first lens to an imaging plane, and f is an overall focal length of the optical imaging system.
    Type: Application
    Filed: November 12, 2024
    Publication date: February 27, 2025
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Tae Youn LEE, Jin Hwa JUNG, Yong Joo JO
  • Patent number: 11905587
    Abstract: The present invention relates to an alloy-coated steel sheet comprising: a steel sheet, and Al—Mg—Si—Zn alloy layer positioned on the steel sheet, wherein the Al—Mg—Si—Zn alloy layer comprises a Mg—Zn alloy phase, and wherein the Mg—Zn alloy phase comprises MgZn2 and Mg2Zn11, and the Mg—Zn alloy phase further comprises at least one of MgZn, Mg21Zn25, Mg51Zn20 and Mg2Zn3.
    Type: Grant
    Filed: December 18, 2019
    Date of Patent: February 20, 2024
    Assignees: POSCO CO., LTD, RESEARCH INSTITUTTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
    Inventors: Ji Hoon Yang, Jae In Jeong, Kyung Hwang Lee, Yong Hwa Jung, Tae Yeob Kim
  • Patent number: 11781207
    Abstract: Provided is a galvanized steel sheet plated by vacuum deposition and, more specifically, to a galvanized steel sheet having excellent hardness and galling resistance, and a method for manufacturing same. The zinc coated steel sheet includes: a base steel sheet; and a zinc coated layer formed on the base steel sheet. The zinc coated layer is formed of a columnar structure, and a content of Mn included in the zinc coated layer is 0.1 to 0.4 wt %.
    Type: Grant
    Filed: November 27, 2019
    Date of Patent: October 10, 2023
    Assignee: POSCO CO., LTD
    Inventors: Kyung-Hoon Nam, Yong-Hwa Jung, Kyoung-Pil Ko, Tae-Yeob Kim, Woo-Sung Jung
  • Patent number: 11731397
    Abstract: Provided are an alloy coating steel plate and a method of manufacturing the same, and in this case, the alloy coating steel plate includes a steel, and an Al—Mg—Si alloy layer positioned on the steel plate, wherein the Al—Mg—Si alloy layer is formed to include Mg—Si alloy grains in an alloy layer configured in an Al—Mg alloy phase.
    Type: Grant
    Filed: March 30, 2021
    Date of Patent: August 22, 2023
    Assignees: POSCO CO., LTD, RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
    Inventors: Ji Hoon Yang, Jae In Jeong, Yong Hwa Jung, Tae Yeob Kim
  • Patent number: 11649542
    Abstract: Provided is a multilayer zinc alloy plated steel material comprising a base steel material and multiple plating layers formed on the base steel material, wherein each of the multiple plating layers includes one of a Zn plating layer, a Mg plating layer, and a Zn—Mg alloy plating layer, and the ratio of the weight of Mg contained in the multiple plating layers to the total weight of the multiple plating layers is from 0.13 to 0.24.
    Type: Grant
    Filed: November 18, 2021
    Date of Patent: May 16, 2023
    Assignee: POSCO CO., LTD
    Inventors: Young-Jin Kwak, Goo-Hwa Kim, Mun-Jong Eom, Seok-Jun Hong, Kyoung-Pil Ko, Yong-Hwa Jung, Dong-Yoeul Lee, Tae-Yeob Kim, Kyung-Hoon Nam
  • Patent number: 11608556
    Abstract: Provided is an alloy-coated steel sheet and a manufacturing method thereof. The alloy-coated steel sheet includes: a steel sheet; and an Al—Mg—Si alloy layer disposed on the steel sheet, wherein the Al—Mg—Si alloy layer has a form in which Mg—Si alloy grains are included in an alloy layer consisting of an Al—Mg alloy phase.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: March 21, 2023
    Assignees: POSCO HOLDINGS INC., RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
    Inventors: Ji Hoon Yang, Jae In Jeong, Yong Hwa Jung, Tae Yeob Kim
  • Publication number: 20220074040
    Abstract: Provided is a multilayer zinc alloy plated steel material comprising a base steel material and multiple plating layers formed on the base steel material, wherein each of the multiple plating layers includes one of a Zn plating layer, a Mg plating layer, and a Zn—Mg alloy plating layer, and the ratio of the weight of Mg contained in the multiple plating layers to the total weight of the multiple plating layers is from 0.13 to 0.24.
    Type: Application
    Filed: November 18, 2021
    Publication date: March 10, 2022
    Inventors: Young-Jin KWAK, Goo-Hwa KIM, Mun-Jong EOM, Seok-Jun HONG, Kyoung-Pil KO, Yong-Hwa JUNG, Dong-Yoeul LEE, Tae-Yeob KIM, Kyung-Hoon NAM
  • Publication number: 20220074042
    Abstract: Provided is an apparatus for controlling a coating layer in a physical vapor deposition (PVD) plating process that forms a coating layer on a steel sheet with metal vapor by PVD. The apparatus for controlling a coating layer comprises: a crucible into which a molten material is introduced; an electromagnetic induction coil disposed around the outer periphery of the crucible to heat the molten material introduced into the crucible and form a molten metal to generate metal vapor from the molten metal; a power supply unit for supplying an electric current to the electromagnetic induction coil; and a control unit for measuring the impedance of the electromagnetic induction coil and controlling the electric current supplied to the electromagnetic induction coil so that the impedance is kept constant according to the molten material which is introduced into the crucible at a constant feed rate.
    Type: Application
    Filed: December 10, 2019
    Publication date: March 10, 2022
    Inventors: Yong-Hwa JUNG, Kyung-Hoon NAM, Tae-Yeob KIM, Woo-Sung JUNG, Kyoung-Pil KO
  • Publication number: 20220074041
    Abstract: The present invention relates to an alloy-coated steel sheet comprising: a steel sheet, and Al—Mg—Si—Zn alloy layer positioned on the steel sheet, wherein the Al—Mg—Si—Zn alloy layer comprises a Mg—Zn alloy phase, and wherein the Mg—Zn alloy phase comprises MgZn2 and Mg2Zn11, and the Mg—Zn alloy phase further comprises at least one of MgZn, Mg21Zn25, Mg51Zn20 and Mg2Zn3.
    Type: Application
    Filed: December 18, 2019
    Publication date: March 10, 2022
    Inventors: Ji Hoon Yang, Jae In Jeong, Kyung Hwang Lee, Yong Hwa Jung, Tae Yeob Kim
  • Publication number: 20220025503
    Abstract: Provided is a galvanized steel sheet plated by vacuum deposition and, more specifically, to a galvanized steel sheet having excellent hardness and galling resistance, and a method for manufacturing same. The zinc coated steel sheet includes: a base steel sheet; and a zinc coated layer formed on the base steel sheet. The zinc coated layer is formed of a columnar structure, and a content of Mn included in the zinc coated layer is 0.1 to 0.4 wt %.
    Type: Application
    Filed: November 27, 2019
    Publication date: January 27, 2022
    Inventors: Kyung-Hoon NAM, Yong-Hwa JUNG, Kyoung-Pil KO, Tae-Yeob KIM, Woo-Sung JUNG
  • Patent number: 11208716
    Abstract: Provided is a multilayer zinc alloy plated steel material comprising a base steel material and multiple plating layers formed on the base steel material, wherein each of the multiple plating layers includes one of a Zn plating layer, a Mg plating layer, and a Zn—Mg alloy plating layer, and the ratio of the weight of Mg contained in the multiple plating layers to the total weight of the multiple plating layers is from 0.13 to 0.24.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: December 28, 2021
    Assignee: POSCO
    Inventors: Young-Jin Kwak, Goo-Hwa Kim, Mun-Jong Eom, Seok-Jun Hong, Kyoung-Pil Ko, Yong-Hwa Jung, Dong-Yoeul Lee, Tae-Yeob Kim, Kyung-Hoon Nam
  • Publication number: 20210213710
    Abstract: Provided are an alloy coating steel plate and a method of manufacturing the same, and in this case, the alloy coating steel plate includes a steel, and an Al—Mg—Si alloy layer positioned on the steel plate, wherein the Al—Mg—Si alloy layer is formed to include Mg—Si alloy grains in an alloy layer configured in an Al—Mg alloy phase.
    Type: Application
    Filed: March 30, 2021
    Publication date: July 15, 2021
    Inventors: Ji Hoon YANG, Jae In JEONG, Yong Hwa JUNG, Tae Yeob KIM
  • Patent number: 10988845
    Abstract: Provided is a plated steel sheet often used as materials for vehicles, home appliances, construction and the like and, more specifically, to a plated steel sheet having a multilayer structure and a method for manufacturing the same.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: April 27, 2021
    Assignee: POSCO
    Inventors: Kyoung-Pil Ko, Kyung-Hoon Nam, Tae-Yeob Kim, Dong-Yoeul Lee, Yong-Hwa Jung, Woo-Sung Jung
  • Publication number: 20210017640
    Abstract: Provided is an apparatus and a method that is capable of performing continuous coating at a constant coating composition and rate. One embodiment is a deposition apparatus for coating two or more compounds or elements on a substrate, the apparatus comprising: a supply unit for supplying the two or more compounds or elements to a plurality of solid bodies; a heating unit for melting and evaporating the solid bodies supplied from the supply unit to form vapor; a buffer unit, connected to the heating unit, in which the vapor stays and is mixed with previously generated vapor; and a nozzle connected to the buffer unit and having an opening toward the substrate.
    Type: Application
    Filed: October 19, 2018
    Publication date: January 21, 2021
    Inventors: Kyung-Hoon NAM, Yong-Hwa JUNG, Mun-Jong EOM, Tae-Yeob KIM, Kyoung-Pil KO, Woo-Sung JUNG
  • Publication number: 20200385854
    Abstract: Provided is an alloy-coated steel sheet and a manufacturing method thereof. The alloy-coated steel sheet includes: a steel sheet; and an Al—Mg—Si alloy layer disposed on the steel sheet, wherein the Al—Mg—Si alloy layer has a form in which Mg—Si alloy grains are included in an alloy layer consisting of an Al—Mg alloy phase.
    Type: Application
    Filed: May 18, 2018
    Publication date: December 10, 2020
    Inventors: Ji Hoon YANG, Jae In JEONG, Yong Hwa JUNG, Tae Yeob KIM
  • Publication number: 20200180272
    Abstract: Provided is an alloy coating steel plate including: a steel plate; a plating layer including Al positioned on one surface or opposite surfaces of the steel plate; and a coating layer positioned on the plating layer. The coating layer is divided into two or three layers. The coating layer includes a phase of one of Al, Si, and Mg or an alloy phase including two or more thereof.
    Type: Application
    Filed: February 13, 2020
    Publication date: June 11, 2020
    Inventors: Ji Hoon YANG, Jae In JEONG, Yong Hwa JUNG, Tae Yeob KIM
  • Publication number: 20200080205
    Abstract: Provided is a plated steel sheet often used as materials for vehicles, home appliances, construction and the like and, more specifically, to a plated steel sheet having a multilayer structure and a method for manufacturing the same.
    Type: Application
    Filed: December 21, 2017
    Publication date: March 12, 2020
    Inventors: Kyoung-Pil KO, Kyung-Hoon NAM, Tae-Yeob KIM, Dong-Yoeul LEE, Yong-Hwa JUNG, Woo-Sung JUNG
  • Publication number: 20200002803
    Abstract: Provided is a multilayer zinc alloy plated steel material comprising a base steel material and multiple plating layers formed on the base steel material, wherein each of the multiple plating layers includes one of a Zn plating layer, a Mg plating layer, and a Zn—Mg alloy plating layer, and the ratio of the weight of Mg contained in the multiple plating layers to the total weight of the multiple plating layers is from 0.13 to 0.24.
    Type: Application
    Filed: December 22, 2017
    Publication date: January 2, 2020
    Inventors: Young-Jin KWAK, Goo-Hwa KIM, Mun-Jong EOM, Seok-Jun HONG, Kyoung-Pil KO, Yong-Hwa JUNG, Dong-Yoeul LEE, Tae-Yeob KIM, Kyung-Hoon NAM
  • Patent number: 10196736
    Abstract: Provided are a heating apparatus configured to generate a coating vapor for coating a base metal (steel sheet) which is continuously transferred in a vacuum state, and a coating device including the heating apparatus. A coating material to be converted into a coating vapor is initially supplied in a solid phase (solid state) and then phase changed into a liquid (liquid state). Thereafter, the liquid-state coating material is supplied to a heating unit, thereby preventing problems such as equipment erosion occurring when a liquid coating material is directly supplied and preventing the decrease of the temperature of a coating material when a solid wire is supplied as a coating material. As a result, the energy efficiency of the heating apparatus may be maximized.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: February 5, 2019
    Assignee: POSCO
    Inventors: Yong-Hwa Jung, Kyung-Hoon Nam, Mun-Jong Eom, Woo-Sung Jung, Seok-Jun Hong, Young-Jin Kwak, Tae-Yeob Kim, Dong-Yoeul Lee