Patents by Inventor Chi Youn Chung

Chi Youn Chung 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).

  • Liquid crystal modulator for detecting a defective substrate and inspection apparatus having the same
    Patent number: 9581842
    Abstract: An inspection apparatus for detecting a defect of a substrate is provided. The inspection apparatus includes a liquid crystal modulator, a light emitting unit, a beam splitter, and a measurement unit. The liquid crystal modulator includes a reflection layer, a liquid crystal layer, an electrode, and a polarizer. The reflection layer reflects a light. The sensor layer includes a hybrid aligned nematic liquid crystal. The electrode is provided on the liquid crystal layer. The polarizer is provided on the electrode.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: February 28, 2017
    Assignees: SAMSUNG DISPLAY CO., LTD., SAMSUNG ELECTRONICS CO., LTD., INDUSTRIAL COOPERATION FOUNDATION CHONBUK NATIONAL UNIVERSITY
    Inventors: Suk Choi, Sung-Mo Gu, Youngjin Noh, Youngwon Kim, Changhyun Ryu, Chi Youn Chung, Seunghee Lee, Young Eun Choi
  • Electro-optic modulator including composite materials and testing apparatus including the same
    Patent number: 9429779
    Abstract: An electro-optic modulator can include a polymer film including liquid crystal (LC) droplets in the polymer film and a transparent electrode layer on an upper surface of the polymer film. A cholesteric liquid crystal (CLC) polymer reflection film can be on a lower surface of the polymer film opposite the transparent electrode layer.
    Type: Grant
    Filed: July 17, 2015
    Date of Patent: August 30, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chi-youn Chung, Heung-mo Koo, Hye-won Kim, Myoung-ki Ahn, Il-hyoung Lee, Jung-sub Lee, Sung-mo Gu
  • ELECTRO-OPTIC MODULATOR INCLUDING COMPOSITE MATERIALS AND TESTING APPARATUS INCLUDING THE SAME
    Publication number: 20160054600
    Abstract: An electro-optic modulator can include a polymer film including liquid crystal (LC) droplets in the polymer film and a transparent electrode layer on an upper surface of the polymer film. A cholesteric liquid crystal (CLC) polymer reflection film can be on a lower surface of the polymer film opposite the transparent electrode layer.
    Type: Application
    Filed: July 17, 2015
    Publication date: February 25, 2016
    Inventors: Chi-youn Chung, Heung-mo Koo, Hye-won Kim, Myoung-ki Ahn, Il-hyoung Lee, Jung-sub Lee, Sung-mo Gu
  • Electro-Optic Modulators and Thin Film Transistor Array Test Apparatus Including the Same
    Publication number: 20150261024
    Abstract: An electro-optic modulator includes an electro-optic sensor layer including a liquid crystal stabilized by a polymer network having a three-dimensional mesh structure that extends from a first surface of the electro-optic sensor layer to second surface of the electro-optic sensor layer opposite the first surface, a transparent electrode layer on the first surface of the electro-optic sensor layer, and a reflective layer on the second surface of the electro-optic sensor layer. A thin film transistor (TFT) array test apparatus includes a light source, an electro-optic modulator including an electro-optic sensor layer formed of a polymer network liquid crystal (PNLC), a power supply that applies a voltage between a transparent electrode layer of the electro-optic modulator and a plurality of pixel electrodes, and a reflected light sensor that measures light reflected from the electro-optic modulator.
    Type: Application
    Filed: January 14, 2015
    Publication date: September 17, 2015
    Inventors: Chi-youn Chung, Young-jin Noh, Eun-ah Park, Ji-min Lee, Sung-mo Gu
  • SUBSTRATE INSPECTION APPARATUS INCLUDING LIQUID CRYSTAL MODULATOR AND MANUFACTURING METHOD OF THE LIQUID CRYSTAL MODULATOR
    Publication number: 20150153593
    Abstract: A substrate inspection apparatus includes a liquid crystal modulator configured to be provided on a substrate, a light source unit provided to be spaced apart from the liquid crystal modulator, a beam splitter provided between the liquid crystal modulator and the light source unit configured to reflect a beam of light from the light source to the liquid crystal modulator, and a measurement unit configured to sense the beam of light reflected by the substrate.
    Type: Application
    Filed: June 26, 2014
    Publication date: June 4, 2015
    Inventors: Sung-Mo GU, SUK CHOI, Youngjin NOH, YOUNGWON KIM, Changhyun RYU, CHI YOUN CHUNG
  • LIQUID CRYSTAL MODULATOR FOR DETECTING A DEFECTIVE SUBSTRATE AND INSPECTION APPARATUS HAVING THE SAME
    Publication number: 20150085200
    Abstract: An inspection apparatus for detecting a defect of a substrate is provided. The inspection apparatus includes a liquid crystal modulator, a light emitting unit, a beam splitter, and a measurement unit. The liquid crystal modulator includes a reflection layer, a liquid crystal layer, an electrode, and a polarizer. The reflection layer reflects a light. The sensor layer includes a hybrid aligned nematic liquid crystal. The electrode is provided on the liquid crystal layer. The polarizer is provided on the electrode.
    Type: Application
    Filed: April 8, 2014
    Publication date: March 26, 2015
    Applicants: Samsung Display Co., Ltd., SAMSUNG ELECTRONICS CO., LTD., INDUSTRIAL COOPERATION FOUNDATION CHONBUK NATIONAL UNIVERSITY
    Inventors: Suk Choi, Sung-Mo Gu, Youngjin Noh, Youngwon Kim, Changhyun Ryu, Chi Youn Chung, Seunghee Lee, Young Eun Choi