Patents Assigned to Dongwoo Fine-Chem
  • Publication number: 20250138360
    Abstract: The present disclosure relates to a transmittance-variable optical laminate including a first polarizing plate, a first transparent conductive layer formed on a first surface of the first polarizing plate, a second polarizing plate arranged to be opposite the first polarizing plate, a second transparent conductive layer formed on a first surface of the second polarizing plate and arranged to be opposite the first transparent conductive layer, and a liquid crystal layer provided between the first transparent conductive layer and the second transparent conductive layer, in which at least one of the first and second transparent conductive layers is in direct contact with either the first polarizing plate or the second polarizing plate, and at least one of the first and second polarizing plates has a single transmittance color b* value of ?6.0 to ?3.0.
    Type: Application
    Filed: November 1, 2022
    Publication date: May 1, 2025
    Applicant: DONGWOO FINE-CHEM CO., LTD.
    Inventors: Hong-Jun AHN, Dong-Hwi KIM, Pyoung-Yun OH, Sung-Hoon JUNG
  • Patent number: 12282619
    Abstract: A touch sensor includes a substrate layer, sensing electrodes on the substrate layer, and at least one device hole penetrating through one or more of the sensing electrodes. The device hole is superimposed over a functional device of an image display device such that the functional device is not positioned in the device hole. The sensing electrodes include first sensing electrodes arranged along a first direction to form a first sensing electrode row and second sensing electrodes arranged along a second direction to form a second sensing electrode column, the first and second directions being perpendicular to each other on the substrate layer. The device hole is defined by a space between a pair of the neighboring first sensing electrodes and a pair of the neighboring second sensing electrodes.
    Type: Grant
    Filed: May 31, 2024
    Date of Patent: April 22, 2025
    Assignee: DONGWOO FINE-CHEM CO., LTD.
    Inventors: Byung Jin Choi, HwanSil Jang
  • Patent number: 12282221
    Abstract: The present invention relates to a transmittance-variable optical laminate, a method for manufacturing same, a smart window comprising same, and a vehicle and building window or door employing same, the optical laminate comprising: a first polarizing plate including a first polarizer and a polarization rotation layer; a first transparent conductive layer formed on one surface of the first polarizing plate; a second polarizing plate including a second polarizer and a retardation layer, and facing the first polarizing plate; a second transparent conductive layer formed on one surface of the second polarizing plate, and facing the first transparent conductive layer; and a liquid crystal layer provided between the first transparent conductive layer and the second transparent conductive layer.
    Type: Grant
    Filed: September 20, 2022
    Date of Patent: April 22, 2025
    Assignee: DONGWOO FINE-CHEM CO., LTD.
    Inventors: Sung-Su Kim, Sung-Ho Baek, Hong-Jun Ahn, Pyoung-Yun Oh
  • Patent number: 12282220
    Abstract: A variable transmittance optical stack, a manufacturing method therefor, a smart window including the same, and windows for an automobile or a building using the same are proposed.
    Type: Grant
    Filed: January 18, 2024
    Date of Patent: April 22, 2025
    Assignee: DONGWOO FINE-CHEM CO., LTD.
    Inventors: Hyun-Seong Kim, Jin-Ho Kim, Hyun-Sun Ryu, Ju-Seob Choi
  • Patent number: 12269788
    Abstract: Disclosed is a composition for removing polymers. The composition contains a fluorinated alkyl compound, a polar aprotic solvent, and an acyclic secondary or tertiary amine compound.
    Type: Grant
    Filed: June 27, 2023
    Date of Patent: April 8, 2025
    Assignee: DONGWOO FINE-CHEM CO., LTD.
    Inventors: Soon-Hong Pang, Kyeong-Muk Choi, Han-Byeol Kang
  • Patent number: 12272869
    Abstract: An antenna structure according to an embodiment of the present invention includes a first antenna unit including a first radiator, a first transmission line connected to the first radiator, and a guide pattern disposed around the first transmission line and separated from the first transmission line, a second antenna unit at least partially covered by the guide pattern of the first antenna unit in a plan view, and a dielectric layer interposed between the first antenna unit and the second antenna unit. An antenna structure implementing low-frequency and high-frequency properties with high reliability is provided.
    Type: Grant
    Filed: June 24, 2022
    Date of Patent: April 8, 2025
    Assignee: DONGWOO FINE-CHEM CO., LTD.
    Inventors: Young Ju Kim, Yoon Ho Huh, Hee Jun Park, Young Su Lee, In Kak Song, Dong Pil Park
  • Patent number: 12271079
    Abstract: A circuit board for a light-emitting diode assembly according to an embodiment includes a substrate layer, dimming zones formed on one surface of the substrate layer, each of the dimming zones comprising a predetermined number of LED landing pads, and a wiring bundle disposed between the dimming zones neighboring in a row direction to extend in a column direction, the wiring bundle including wirings connected to the LED landing pads at the same level.
    Type: Grant
    Filed: August 9, 2022
    Date of Patent: April 8, 2025
    Assignee: DONGWOO FINE-CHEM CO., LTD.
    Inventors: Cheol Hun Lee, Do Hyoung Kwon, Sung Jin Noh
  • Publication number: 20250102855
    Abstract: The present invention relates to a variable transmittance optical laminate and a manufacturing method therefor, a smart window comprising same, and automobile and building window systems using same, the variable transmittance optical laminate includes: a first laminate in which a first polarizing plate, a first transparent conductive layer, and a first alignment layer are sequentially laminated; a second laminate which faces the first laminate and in which a second polarizing plate, a second transparent conductive layer, and a second alignment layer are sequentially laminated; a liquid crystal layer disposed between the first laminate and the second laminate; and a sealant formed along the outer circumferential surface of the liquid crystal layer and sealing the liquid crystal layer.
    Type: Application
    Filed: December 16, 2022
    Publication date: March 27, 2025
    Applicant: DONGWOO FINE-CHEM CO., LTD.
    Inventors: Dong-Hwi KIM, Hong-Jun AHN, Pyoung-Yun OH
  • Patent number: 12255414
    Abstract: A package board according to an embodiment of the present disclosure includes a first core layer, a feeding wiring disposed on the first core layer, and a first connector mounted on the first core layer and electrically connected to the feeding wiring through a row directional side thereof. The feeding wiring includes a first portion extending in a column direction of the first core layer and a second portion bent from the first portion to extend in a row direction of the first core layer.
    Type: Grant
    Filed: July 12, 2022
    Date of Patent: March 18, 2025
    Assignee: DONGWOO FINE-CHEM CO., LTD.
    Inventors: Na Yeon Kim, Young Ju Kim, Hee Jun Park, Won Hee Lee
  • Patent number: 12255386
    Abstract: An antenna package according to an embodiment includes antenna units, and a circuit board electrically connected to the antenna units. The circuit board includes a core layer, antenna feeding lines distributed on a surface of the core layer and connected to the antenna units, power/data lines distributed on the surface of the core layer, power/data ports connected to end portions of the power/data lines, and antenna feeding ports connected to end portions of the antenna feeding lines and arranged to be closer to the antenna units than the power/data ports.
    Type: Grant
    Filed: October 26, 2022
    Date of Patent: March 18, 2025
    Assignee: DONGWOO FINE-CHEM CO., LTD.
    Inventors: Byung Jin Choi, Jae Hyun Lee, Hee Jun Park
  • Patent number: 12249767
    Abstract: An antenna package according to an embodiment includes an antenna device and a flexible circuit board. The antenna device includes a dielectric layer, a first antenna unit arranged on the dielectric layer and a second antenna unit arranged on the dielectric layer to be physically and electrically separated from the first antenna unit. The printed circuit board is coupled to the antenna device to be electrically connected to the first antenna unit, and electrically separated from the second antenna unit.
    Type: Grant
    Filed: January 13, 2023
    Date of Patent: March 11, 2025
    Assignee: DONGWOO FINE-CHEM CO., LTD.
    Inventors: Jong Min Kim, Young Su Lee, Yoon Ho Huh
  • Patent number: 12244054
    Abstract: An antenna package according to an exemplary embodiment includes an antenna unit, a printed circuit board including an antenna connection wiring electrically connected to the antenna unit, an antenna driving integrated circuit (IC) chip mounted on the printed circuit board and connected to the antenna connection wiring, and a touch sensor driving IC chip and a display driving IC chip mounted on the printed circuit board together with the antenna driving IC chip. The driving IC chips are integrated in a single printed circuit board to improve spatial and process efficiency.
    Type: Grant
    Filed: September 6, 2022
    Date of Patent: March 4, 2025
    Assignee: DONGWOO FINE-CHEM CO., LTD.
    Inventors: Byung Jin Choi, Ho Dong Yoon, Jae Hyun Lee
  • Patent number: 12242697
    Abstract: A touch sensor according to an embodiment includes a transparent substrate layer having an active region and an inactive region, and a conductive pattern formed on the active region and including a stacked structure of a metal layer and a blackened layer. A color difference defined by Equation 1 is 10 or less.
    Type: Grant
    Filed: February 23, 2024
    Date of Patent: March 4, 2025
    Assignee: DONGWOO FINE-CHEM CO., LTD.
    Inventors: Dong Bin Yoo, Sun Ju Kim, Jeong Yong Seo, Hee Yong Lee, Yong Sun Han
  • Patent number: 12244059
    Abstract: An antenna device according to an embodiment of the present invention includes a dielectric layer, a first radiator disposed on the dielectric layer in a first direction, a second radiator formed in a shape different from that of the first radiator and disposed on the dielectric layer in a second direction, a first transmission line which extends in the first direction to be connected to the first radiator, and a second transmission line which extends in the second direction to be connected to the second radiator, and intersects the first transmission line with being physically or electrically spaced apart therefrom.
    Type: Grant
    Filed: December 8, 2022
    Date of Patent: March 4, 2025
    Assignees: DONGWOO FINE-CHEM CO., LTD., POSTECH RESEARCH AND BUSINESS DEVELOPMENT FOUNDATION
    Inventors: Jae Hyun Lee, Dong Pil Park, Won Hee Lee, Hee Jun Park, Won Bin Hong
  • Patent number: 12230872
    Abstract: An antenna device according to an embodiment includes a dielectric layer, a rhombus-shaped first radiator disposed on an upper surface of the dielectric layer, a transmission line connected to the first radiator, a signal pad connected to one end of the transmission line, ground pads disposed around the signal pad, and second radiators extending from the ground pad along lower sides of the first radiator.
    Type: Grant
    Filed: December 9, 2022
    Date of Patent: February 18, 2025
    Assignee: DONGWOO FINE-CHEM CO., LTD.
    Inventors: Hee Jun Park, Dong Pil Park, Jae Hyun Lee
  • Patent number: 12228599
    Abstract: An apparatus for inspecting an antenna includes a stage including a ground on which an antenna device is disposed, an inspection board configured to be in contact with and connected to the antenna device, a connection maintaining unit for maintaining a contact and connection between the antenna device and the inspection board, and an inspection unit mounted or connected to the inspection board to inspect the antenna device.
    Type: Grant
    Filed: November 14, 2022
    Date of Patent: February 18, 2025
    Assignee: DONGWOO FINE-CHEM CO., LTD.
    Inventors: Han Sub Ryu, Dong Pil Park, Byung Jin Choi
  • Patent number: 12230873
    Abstract: An antenna package includes an antenna device including an antenna dielectric layer and an antenna unit formed on the antenna dielectric layer, and an intermediate circuit board electrically connected to the antenna unit. The intermediate circuit board includes a core layer and a signal line formed on a surface of the core layer and electrically connected to the antenna unit. A width of one end portion of the signal line connected to the antenna unit is smaller than a width of the other end portion opposite to the one end portion of the signal line. Impedance mismatching is prevented by the construction of the signal line to improve antenna properties.
    Type: Grant
    Filed: January 24, 2023
    Date of Patent: February 18, 2025
    Assignee: DONGWOO FINE-CHEM CO., LTD.
    Inventors: Na Yeon Kim, Sung Hoe Kim, Dae Kyu Kim, Byung Eun Jeon
  • Patent number: 12228495
    Abstract: A flow nanoparticle measurement device according to an embodiment of the present disclosure includes a flow cell in which a liquid sample flows, a first laser beam being irradiated to the flow cell; a laser generator configured to generate the first laser beam; and a flow controller configured to control a flow of the liquid sample for the flow cell.
    Type: Grant
    Filed: October 20, 2021
    Date of Patent: February 18, 2025
    Assignee: DONGWOO FINE-CHEM CO., LTD.
    Inventors: Su Yeon Oh, Young Hoon Kim, Seung Pil Han, Jun Hee Sung
  • Patent number: 12230924
    Abstract: A connector structure according to an embodiment of the present disclosure includes a second connector and a first connector coupled to the second connector. The first connector includes a first insulator, a first conductive connection terminal disposed on the first insulator, a second conductive connection terminal spaced apart from the first conductive connection terminal to form a single row structure on the first insulator together with the first conductive connection terminal, and a first barrier structure disposed between the first conductive connection terminal and the second conductive connection terminal on the first insulator.
    Type: Grant
    Filed: February 16, 2022
    Date of Patent: February 18, 2025
    Assignee: DONGWOO FINE-CHEM CO., LTD.
    Inventors: Young Ju Kim, Byung Jin Choi, Han Sub Ryu, Na Yeon Kim, Dong Pil Park, Jae Hyun Lee
  • Patent number: 12225663
    Abstract: An antenna structure according to an embodiment includes an antenna device, a circuit board connected to the antenna device and including an inner insulation layer, and an outer insulation layer formed on the antenna device to cover the antenna unit and a portion of the circuit board. A portion of the inner insulation layer covered by the outer insulation layer may have a smaller thickness than a thickness of a portion of the inner insulation layer not covered by the outer insulation layer.
    Type: Grant
    Filed: April 7, 2023
    Date of Patent: February 11, 2025
    Assignee: DONGWOO FINE-CHEM CO., LTD.
    Inventors: Na Yeon Kim, Dae Kyu Kim, Han Sub Ryu