Patents by Inventor Chae Il Cheon

Chae Il Cheon 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: 8168353
    Abstract: Disclosed herein is a method of curing a color filter for an electronic display using an electron beam at low temperature. A conventional method of curing the color filter by thermal-heating is not suitable for a process of fabricating next generation flexible displays. In the method of the invention, after a color resist pattern is formed on a substrate, the resist is cured by an electron beam at 100° C. or less. Hence, the method can minimize damage of the substrate while facilitating dimension control of the color pattern and achieving precision of a fine pattern. A method of fabricating a color filter for an electronic display using the method is also disclosed.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: May 1, 2012
    Assignee: Hoseo University Academic Cooperation Foundation
    Inventors: Jeong Seog Kim, Chae Il Cheon, Jung Min Cho, Kyoung Ho Lee, Young Hwan Han
  • Patent number: 7758773
    Abstract: This disclosure outlines a new method of modifying the properties of existing liquid crystals by doping them with ferroelectric micro- and nanoparticles. We show that this approach, in contrast to the traditional time consuming and expensive chemical synthetic methods, enriches and enhances the electro-optical performance of many liquid crystal materials. We demonstrate that by changing the concentration and type of ferroelectric particles the physical properties of the nematic, smectic, and cholesteric liquid crystal materials can be changed, including the dielectric constants, the birefringence, the phase transition temperatures, and even the order parameter. We also demonstrate the performance of these new materials in various devices, including displays, light modulators, and beam steering devices.
    Type: Grant
    Filed: March 14, 2007
    Date of Patent: July 20, 2010
    Assignee: Kent State University
    Inventors: John L. West, Chae Il Cheon, Anatoliy V. Glushchenko, Yuriy Reznikov, Fenghua Li
  • Publication number: 20100104957
    Abstract: Disclosed herein is a method of curing a color filter for an electronic display using an electron beam at low temperature. A conventional method of curing the color filter by thermal-heating is not suitable for a process of fabricating next generation flexible displays. In the method of the invention, after a color resist pattern is formed on a substrate, the resist is cured by an electron beam at 100° C. or less. Hence, the method can minimize damage of the substrate while facilitating dimension control of the color pattern and achieving precision of a fine pattern. A method of fabricating a color filter for an electronic display using the method is also disclosed.
    Type: Application
    Filed: January 30, 2009
    Publication date: April 29, 2010
    Inventors: Jeong Seog Kim, Chae Il Cheon, Jung Min Cho, Kyoung Ho Lee, Young Hwan Han, Byoung Cheol Lee
  • Publication number: 20030134156
    Abstract: A method for manufacturing a high density piezoelectric thick film includes the steps of: mixing and dispersing piezoelectric material powder and a sol in a vehicle made of an organic binder and solvent, to fabricate a paste; printing the paste to a thickness of 5-100 micron on a substrate by a screen printing, to form a thick film; drying the thick film, and thermally treating the thick film.
    Type: Application
    Filed: May 23, 2002
    Publication date: July 17, 2003
    Inventors: Tae Song Kim, Yong Bum Kim, Chae Il Cheon