Patents by Inventor Chang-Suk CHOI

Chang-Suk CHOI 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: 11802243
    Abstract: A liquid-crystal (LC) media having a negative dielectric anisotropy containing a compound of formula I and the use of the LC media for optical, electro-optical and electronic purposes, in particular in energy-efficient LC displays, especially in IPS, FFS, VA or PS-VA displays.
    Type: Grant
    Filed: February 23, 2022
    Date of Patent: October 31, 2023
    Assignee: Merck Patent GmbH
    Inventors: Jing Wang, Ping Zhao, Chang-Suk Choi
  • Patent number: 11739267
    Abstract: LC media and LC displays containing an LC medium with positive dielectric anisotropy, which contains one or more compounds of formula I in a concentration of >0 and ?10% and displays addressed by an active matrix and in particular displays of the IPS, PS-IPS, FFS, PS-FFS, HB-FFS, U-IPS, TN, PS-TN, STN or TN-TFT mode.
    Type: Grant
    Filed: June 26, 2020
    Date of Patent: August 29, 2023
    Assignee: MERCK PATENT GMBH
    Inventors: Yeon-Jeong Han, Dong-Hyun Kim, Heui-Seok Jin, Chang-Suk Choi
  • Patent number: 11655417
    Abstract: The invention relates to a liquid-crystalline medium, in particular based on a mixture of polar compounds, and to the use thereof for an active-matrix display, in particular based on the VA, SA-VA, IPS, PS-IPS, FFS, PS-FFS, UB-FFS or PS-UB-FFS effect.
    Type: Grant
    Filed: April 27, 2020
    Date of Patent: May 23, 2023
    Assignee: MERCK PATENT GMBH
    Inventors: Su-Young Kim, Chang-Suk Choi, Jeong-Hee Sung, Ming Chou Wu, Sang-Kyu Lee
  • Publication number: 20220282158
    Abstract: A liquid-crystal (LC) media having a negative dielectric anisotropy containing a compound of formula I and the use of the LC media for optical, electro-optical and electronic purposes, in particular in energy-efficient LC displays, especially in IPS, FFS, VA or PS-VA displays.
    Type: Application
    Filed: February 23, 2022
    Publication date: September 8, 2022
    Applicant: Merck Patent GmbH
    Inventors: Zoe WANG, Peter ZHAO, Chang-Suk CHOI
  • Patent number: 10961457
    Abstract: The present invention relates to liquid-crystalline media comprising a) one or more compounds of the formula ST-1, as defined herein, and b) one or more compounds of the formula ST-2, as defined herein, and c) one or more compounds of the formula RV, as defined herein, and d) one or more compounds selected from formula IA and IB, as defined herein, and to liquid-crystal displays containing these media, especially to displays addressed by an active matrix and in particular to displays of the in-plane switching (IPS) or fringe-field switching (FFS) type.
    Type: Grant
    Filed: March 16, 2018
    Date of Patent: March 30, 2021
    Assignee: Merck Patent GmbH
    Inventors: Chang-Jun Yun, Chang-Suk Choi, Yeon-Jeong Han, Heui-Seok Jin, Yong-Kuk Yun
  • Publication number: 20200407640
    Abstract: LC media and LC displays containing an LC medium with positive dielectric anisotropy, which contains one or more compounds of formula I in a concentration of >0 and ?10% and displays addressed by an active matrix and in particular displays of the IPS, PS-IPS, FFS, PS-FFS, HB-FFS, U-IPS, TN, PS-TN, STN or TN-TFT mode.
    Type: Application
    Filed: June 26, 2020
    Publication date: December 31, 2020
    Applicant: MERCK PATENT GMBH
    Inventors: Yeon-Jeong HAN, Dong-Hyun KIM, Heui-Seok JIN, Chang-Suk CHOI
  • Publication number: 20200339882
    Abstract: The invention relates to a liquid-crystalline medium, in particular based on a mixture of polar compounds, and to the use thereof for an active-matrix display, in particular based on the VA, SA-VA, IPS, PS-IPS, FFS, PS-FFS, UB-FFS or PS-UB-FFS effect.
    Type: Application
    Filed: April 27, 2020
    Publication date: October 29, 2020
    Applicant: MERCK PATENT GMBH
    Inventors: Su-Young KIM, Chang-Suk CHOI, Jeong-Hee SUNG, Ming Chou WU, Sang-Kyu LEE
  • Publication number: 20200071616
    Abstract: Dielectrically positive liquid-crystalline media comprising one or more compounds of each of the formulae S1 and S2, and one or more compounds selected from the group of the compounds of the formulae II and III and/or IV and/or VIII, in which the parameters have the meanings indicated in the specification, and optionally one or more further dielectrically positive compounds and optionally one or more further dielectrically neutral compounds. Also, liquid-crystal displays, especially active-matrix displays and in particular TN, IPS and FFS displays, containing these media.
    Type: Application
    Filed: August 28, 2019
    Publication date: March 5, 2020
    Applicant: MERCK PATENT GMBH
    Inventors: Chang-Suk CHOI, Chang-Jun YUN, Yeon-Jeong HAN, Hee-Kyu LEE, Yong-Kuk YUN
  • Publication number: 20180265785
    Abstract: The present invention relates to liquid-crystalline media comprising a) one or more compounds of the formula ST-1, as defined herein, and b) one or more compounds of the formula ST-2, as defined herein, and c) one or more compounds of the formula RV, as defined herein, and d) one or more compounds selected from formula IA and IB, as defined herein, and to liquid-crystal displays containing these media, especially to displays addressed by an active matrix and in particular to displays of the in-plane switching (IPS) or fringe-field switching (FFS) type.
    Type: Application
    Filed: March 16, 2018
    Publication date: September 20, 2018
    Applicant: Merck Patent GmbH
    Inventors: Chang-Jun YUN, Chang-Suk CHOI, Yeon-Jeong HAN, Heui-Seok JIN, Yong-Kuk YUN
  • Publication number: 20180265786
    Abstract: Liquid-crystalline media containing a) one or more compounds of formula IA, and b) one or more compounds of formula II and c) one or more compounds of formulae III-1 to III-4, their use in electro-optical displays, particularly in active-matrix displays based on the VA, ECB, FFS or IPS effect.
    Type: Application
    Filed: March 16, 2018
    Publication date: September 20, 2018
    Applicant: MERCK PATENT GMBH
    Inventors: Chang-Suk Choi, Chang-Jun Yun, Yeon-Jeong Han, Heui-Seok Jin, Yong-Kuk Yun
  • Publication number: 20180265784
    Abstract: A liquid-crystalline medium which comprises at least one compound of the formula I, and one or more compounds of the formula ST and to the use thereof for an active-matrix display, in particular based on the VA, PSA, PA-VA, SS-VA, SA-VA, PS-VA, PALC, IPS, PS-IPS, UB-FFS, U-IPS, FFS or PS-FFS effect.
    Type: Application
    Filed: March 16, 2018
    Publication date: September 20, 2018
    Applicant: MERCK PATENT GMBH
    Inventors: Chang-Suk CHOI, Chang-Jun YUN, Yeon-Jeong HAN, Heui-Seok JIN, Yong-Kuk YUN
  • Publication number: 20180195002
    Abstract: The present invention relates to liquid-crystalline media comprising one or more compounds selected from the compounds of formula I and compounds of formulae CV, OT and CP wherein the occurring groups have the meanings defined herein, and to liquid-crystal displays containing these media, especially to active-matrix displays and in particular to IPS and FFS displays. The invention further relates to a process for the fabrication of liquid crystal displays using the ODF process.
    Type: Application
    Filed: January 9, 2018
    Publication date: July 12, 2018
    Applicant: MERCK PATENT GMBH
    Inventors: Chang-Jun YUN, Chang-Suk CHOI, Yeon-Jeong HAN, Heui-Seok JIN, Yong-Kuk YUN