Patents Assigned to SK IE TECHNOLOGY CO., LTD.
  • Patent number: 11851565
    Abstract: Provided is a method of preparing a composition for forming a polyimide film which may significantly improve dispersibility of a pigment. Specifically, the method includes preparing a polyamic acid resin in the presence of a pigment dispersion including a blue-based inorganic pigment and a dispersing agent. In addition, an average particle size of the inorganic pigment in the pigment dispersion may be 10 to 100 nm.
    Type: Grant
    Filed: August 29, 2022
    Date of Patent: December 26, 2023
    Assignees: SK Innovation Co., Ltd., SK ie technology Co., Ltd.
    Inventors: Cheol Min Yun, Hye Jin Park
  • Patent number: 11851412
    Abstract: The present invention relates to a diamine compound, a method of preparing the same, and a composition containing the same. The diamine compound of the present invention may be very usefully used as a monomer used to produce a polyimide film having excellent heat resistance and improved transparency and coefficient of thermal expansion.
    Type: Grant
    Filed: September 1, 2021
    Date of Patent: December 26, 2023
    Assignees: SK Innovation Co., Ltd., SK ie technology Co., Ltd.
    Inventors: Min Seon Jung, Hyo Shin Kwak, Joo Hyun Lee
  • Patent number: 11845842
    Abstract: The present invention relates to a new window cover film protecting a flexible display panel. Specifically, provided is a window cover film protecting a surface of a display device, the window cover film including a protective film formed on a base layer or a hard coating layer of a hard coating film having the base layer and the hard coating layer, and having no problem that the window cover film cannot be used as a display window cover film because a part of the protective film is not peeled off due to static electricity generated in the protective film, the base layer, or the hard coating layer when the protective film is peeled off, and the protective film remains on the base layer or a hard coating layer or the hard coating layer is partially or entirely peeled off.
    Type: Grant
    Filed: September 28, 2020
    Date of Patent: December 19, 2023
    Assignees: SK Innovation Co., Ltd., SK ie technology Co., Ltd.
    Inventors: Jong Nam Ahn, Hye Jin Kim
  • Patent number: 11846755
    Abstract: Provided is a hard coating film. The hard coating film includes a base layer and a hard coating layer disposed on the base layer and having a pencil hardness of 4H or higher. A surface elongation at break of the hard coating film falls within a predetermined range, as measured by a certain method. The hard coating film shows excellent durability under high-temperature/high-humidity conditions, has no microcracks formed after repeated folding, and shows excellent pencil hardness.
    Type: Grant
    Filed: February 10, 2020
    Date of Patent: December 19, 2023
    Assignees: SK Innovation Co., Ltd., SK ie technology Co., Ltd.
    Inventors: Jong Nam Ahn, Byoung Sun Ko, Jin Su Park, Tae Sug Jang, Keon Hyeok Ko, Ho Chul Yoon
  • Patent number: 11843125
    Abstract: The present invention relates to: a porous composite separator for a secondary battery including a porous substrate, and a coating layer formed on the porous substrate, wherein the coating layer has a plurality of inorganic particles, which are connected and fixed by a composite binder including a particulate polymer binder and an interpenetrating polymer network (IPN)-type binder having no melting point and having a thermal decomposition temperature of 300° C. or higher; and a lithium secondary battery including the same.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: December 12, 2023
    Assignees: SK Innovation Co., Ltd., SK ie technology Co., Ltd.
    Inventors: Hye Jin Kim, Yun Bong Kim, Suji Lee, Won Sub Kwack, Kyu Young Cho
  • Patent number: 11840631
    Abstract: Provided are a polyimide-based film, a window cover film, and a display device including the same. In detail, provided is a polyimide-based film whose solubility in an ethyl cellosolve solvent satisfies the following Equation 1: ( FW 1 - FW 2 ) FW 1 × 100 ? 50 ? % [ Equation ? ? 1 ] wherein FW1 is a weight of an initial film before being immersed in a solvent, and FW2 is a weight of the film measured after the film is immersed in an ethyl cellosolve solvent, left at 60° C. for 2 hours, and cooled to room temperature, the solvent is removed, and the film is dried at 80° C. for 4 hours.
    Type: Grant
    Filed: September 29, 2020
    Date of Patent: December 12, 2023
    Assignees: SK Innovation Co., Ltd., SK ie technology Co., Ltd.
    Inventor: Jong Nam Ahn
  • Patent number: 11814491
    Abstract: Provided are a transparent film, an optical material including the same, and a display device including the same.
    Type: Grant
    Filed: August 5, 2020
    Date of Patent: November 14, 2023
    Assignees: SK Innovation Co., Ltd., SK ie technology Co., Ltd.
    Inventors: Min Sang Park, Jin Hyung Park, Seung Min Jeon, Yoo Seock Hwang
  • Patent number: 11811090
    Abstract: The present invention relates to a separator, a method of manufacturing the separator, and an electrochemical device including the separator. An embodiment of the present invention may provide a separator including: a porous substrate; an inorganic particle layer provided on at least one surface of the porous substrate; and a heat fusion layer provided on at least one surface of the inorganic particle layer, wherein a surface gloss value at 60° C. of a surface of the heat fusion layer is 10 GU or more.
    Type: Grant
    Filed: June 8, 2023
    Date of Patent: November 7, 2023
    Assignees: SK INNOVATION CO., LTD., SK IE TECHNOLOGY CO., LTD.
    Inventors: Won Sub Kwack, Tae Wook Kwon, Heung Taek Bae, Chang Hee Lee
  • Patent number: 11807730
    Abstract: Provided are a composition for forming a polyimide film for a cover window which may satisfy performance required for an advanced cover window, a method for preparing the same, and a use thereof. According to an implementation, a polyimide film for a cover window, which has excellent visibility without optical stain while colorless and transparent optical properties were not deteriorated and has excellent heat resistance and mechanical properties, and thus, is for use in optical applications, may be provided. In addition, a polyimide film for a cover window according to an implementation may be useful in various display devices.
    Type: Grant
    Filed: June 15, 2022
    Date of Patent: November 7, 2023
    Assignees: SK Innovation Co., Ltd., SK ie technology Co., Ltd.
    Inventors: Cheol Min Yun, Hye Jin Park
  • Patent number: 11795271
    Abstract: An embodiment relates to a polyimide based film for a cover window that may satisfy required performance of an advanced cover window, and a use thereof, and the polyimide based film for a cover window according to the embodiment has excellent visibility without optical stains without deterioration in colorless and transparent optical physical properties, and excellent heat resistance and mechanical physical properties, and thus, may be usefully used for optical applications or the purpose of replacing existing tempered glass. In addition, the polyimide based film for a cover window according to an embodiment may be usefully used in a multilayer structure and a display device.
    Type: Grant
    Filed: June 13, 2022
    Date of Patent: October 24, 2023
    Assignees: SK Innovation Co., Ltd., SK ie technology Co., Ltd.
    Inventors: Cheol Min Yun, Hye Jin Park
  • Patent number: 11794446
    Abstract: Provided are a glass substrate multilayer structure including a glass substrate; a polyimide-based shatter-proof layer formed on one surface of the glass substrate; and a hard coating layer formed on the polyimide-based shatter-proof layer. The polyimide-based shatter-proof layer has a thickness of 5 to 50 ?m, the hard coating layer has a thickness of 5 to 20 ?m, and the glass substrate multilayer structure has a retardation in a thickness direction (Rth) of 200 nm or less. A method for manufacturing the glass substrate multilayer structure, and a display panel including the glass substrate multilayer structure are also provided.
    Type: Grant
    Filed: June 27, 2022
    Date of Patent: October 24, 2023
    Assignees: SK Innovation Co., Ltd., SK ie technology Co., Ltd.
    Inventors: Hyun Joo Song, Cheol Min Yun
  • Patent number: 11796718
    Abstract: The present invention relates to an optical laminate and a flexible display panel including the same, and more particularly, to an optical laminate including a self-restoration barrier adhesive layer and a flexible display panel including the same.
    Type: Grant
    Filed: April 19, 2021
    Date of Patent: October 24, 2023
    Assignees: SK Innovation Co., Ltd., SK ie technology Co., Ltd.
    Inventor: Jong Nam Ahn
  • Patent number: 11787941
    Abstract: Provided are a polyimide-based film, a window cover film, and a display device including the same. More specifically, a polyimide-based film having different surface energies from each other on both surfaces, a window cover film having excellent optical properties such as a visibility, and a display panel including the same are provided.
    Type: Grant
    Filed: September 28, 2020
    Date of Patent: October 17, 2023
    Assignees: SK Innovation Co., Ltd., SK ie technology Co., Ltd.
    Inventors: Seung Min Jeon, Min Sang Park, Je Seung Park, Yeong Min Jo
  • Patent number: 11773221
    Abstract: The present invention relates to a polyimide-based film, a window cover film, and a display panel including the same. More specifically, the present invention relates to a polyimide-based film having a difference (?I) between the maximum and minimum values of intensity in a thickness direction of 0.6 or less, when an aromatic ring peak of 1610 to 1630 cm?1 was measured by Raman spectroscopy in which an excitation wavelength is 532 nm, a laser spot is 1 to 2 ?m, and a thickness direction measurement interval is 1 ?m.
    Type: Grant
    Filed: May 3, 2021
    Date of Patent: October 3, 2023
    Assignees: SK Innovation Co., Ltd., SK ie technology Co., Ltd.
    Inventors: Hyeon Jeong Kim, Sang Yoon Park
  • Patent number: 11693155
    Abstract: Provided is a hard coating film in which a hard coating layer having a water contact angle of 90° or less, a conductive layer, and a low refractive index layer are laminated on a substrate, the film having excellent hardness, anti-curling property, antireflection performance, antifouling performance, and antistatic performance.
    Type: Grant
    Filed: August 22, 2019
    Date of Patent: July 4, 2023
    Assignees: SK Innovation Co., Ltd., SK ie technology Co., Ltd.
    Inventors: Jong Nam Ahn, Tae Sug Jang, Byoung Sun Ko, Jin Su Park, Ho Chul Yoon
  • Patent number: 11692108
    Abstract: Provided is a composition for forming a hard coating layer, which includes an epoxy siloxane resin, a crosslinking agent including a compound having an alicyclic epoxy group, a thermal initiator including a compound represented by a specific chemical formula, a photoinitiator, a fluorine-substituted (meth)acrylate compound, and silica nanoparticles surface-modified with a fluorine compound, and forms a hard coating layer having excellent hardness and antifouling property and suppressing curling.
    Type: Grant
    Filed: August 12, 2019
    Date of Patent: July 4, 2023
    Assignees: SK Innovation Co., Ltd., SK ie technology Co., Ltd.
    Inventors: Jong Nam Ahn, Byoung Sun Ko, Jin Su Park, Tae Sug Jang, Ho Chul Yoon
  • Patent number: 11693154
    Abstract: Provided is a hard coating film in which a hard coating layer having a water contact angle of 90° or less, a high refractive index layer, and a low refractive index layer are laminated on a substrate, the film having suppressed curling, and excellent hardness and antireflection performance.
    Type: Grant
    Filed: August 22, 2019
    Date of Patent: July 4, 2023
    Assignees: SK Innovation Co., Ltd., SK ie technology Co., Ltd.
    Inventors: Jong Nam Ahn, Tae Sug Jang, Byoung Sun Ko, Jin Su Park, Ho Chul Yoon
  • Patent number: 11661481
    Abstract: Provided are a polyimide-based film, a window cover film, and a display panel including the same. More particularly, a polyimide-based film having excellent visibility, a window cover film using the same, and a display panel including the same are provided.
    Type: Grant
    Filed: July 28, 2021
    Date of Patent: May 30, 2023
    Assignees: SK Innovation Co., Ltd., SK ie technology Co., Ltd.
    Inventors: Sun Kug Kim, Min Sang Park, Seung Min Jeon, Jin Su Park, Hyun Joo Song
  • Patent number: 11655338
    Abstract: Provided are a polyimide-based film, a window cover film, and a display panel including the same. More particularly, a polyimide-based film having different surface properties of both surfaces is provided.
    Type: Grant
    Filed: June 16, 2021
    Date of Patent: May 23, 2023
    Assignees: SK Innovation Co., Ltd., SK ie technology Co., Ltd.
    Inventors: Jin Su Park, Min Sang Park, Hyun Joo Song, Suk Chin Lee
  • Patent number: 11654665
    Abstract: The present invention relates to a window cover film and a flexible display panel including the same. More particularly, the present invention relates to a window cover film including a base layer, a hard coating layer, and an anti-fingerprint layer, and a flexible display panel including the same.
    Type: Grant
    Filed: September 28, 2020
    Date of Patent: May 23, 2023
    Assignees: SK Innovation Co., Ltd., SK ie technology Co., Ltd.
    Inventors: Jong Nam Ahn, Keon Hyeok Ko