Patents by Inventor Won-il CHOI

Won-il 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: 11515495
    Abstract: A display device including a flexible base substrate; a pixel circuit and a light emitting structure sequentially disposed on the flexible base substrate; and a stretchable film attached on a bottom of the flexible base substrate. The stretchable film includes a first region and a second region, which are divided according to curvatures of an object, and at least one of different patterns and different disposed structures are arranged in each of the first region and the second region.
    Type: Grant
    Filed: August 17, 2020
    Date of Patent: November 29, 2022
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hye-Jin Joo, Won-Il Choi, Jong-Ho Hong
  • Patent number: 10790459
    Abstract: A stretchable film includes a first region including a plurality of first patterns having a concave polygonal shape. The stretchable film also includes a second region including a plurality of second patterns having a concave polygonal shape. The stretchable film further includes a buffer region between the first region and the second region.
    Type: Grant
    Filed: January 11, 2019
    Date of Patent: September 29, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hye-Jin Joo, Won-Il Choi, Jong-Ho Hong
  • Patent number: 10217950
    Abstract: A stretchable film includes a first region including a plurality of first patterns having a concave polygonal shape. The stretchable film also includes a second region including a plurality of second patterns having a concave polygonal shape. The stretchable film further includes a buffer region between the first region and the second region.
    Type: Grant
    Filed: July 27, 2015
    Date of Patent: February 26, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hye-Jin Joo, Won-Il Choi, Jong-Ho Hong
  • Patent number: 8486528
    Abstract: The present invention relates to a process of preparing a biocompatible temperature-sensitive nano-carrier, which comprises the steps of (a) preparing a polymer dispersion comprising a water-soluble biocompatible polymer with photo-crosslinkable functional group(s), (b) preparing a polymer-initiator solution by adding an initiator to the polymer dispersion, and (c) preparing the nano-carrier by irradiating light onto the polymer-initiator solution, wherein the average diameter of the nano-carrier changes depending on temperature, and also relates to a temperature-sensitive nano-carrier. Nano-carriers of the present invention are temperature-sensitive, and their average diameter and pore size reversibly change in response to temperature change. In an embodiment of the present invention, nano-carriers can be prepared via a one-pot single-phase synthesis.
    Type: Grant
    Filed: January 16, 2009
    Date of Patent: July 16, 2013
    Assignee: Gwangju Institute of Science and Technology
    Inventors: Gi-yoong Tae, Won-il Choi, Ja-young Kim
  • Publication number: 20090196937
    Abstract: The present invention relates to a process of preparing a biocompatible temperature-sensitive nano-carrier, which comprises the steps of (a) preparing a polymer dispersion comprising a water-soluble biocompatible polymer with photo-crosslinkable functional group(s), (b) preparing a polymer-initiator solution by adding an initiator to the polymer dispersion, and (c) preparing the nano-carrier by irradiating light onto the polymer-initiator solution, wherein the average diameter of the nano-carrier changes depending on temperature, and also relates to a temperature-sensitive nano-carrier. Nano-carriers of the present invention are temperature-sensitive, and their average diameter and pore size reversibly change in response to temperature change. In an embodiment of the present invention, nano-carriers can be prepared via a one-pot single-phase synthesis.
    Type: Application
    Filed: January 16, 2009
    Publication date: August 6, 2009
    Applicant: GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Gi-yoong TAE, Won-il CHOI, Ja-young KIM