Patents by Inventor Hojun Ryu

Hojun Ryu 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).

  • Publication number: 20150235589
    Abstract: Provided are a display device and a driving method thereof. The driving method of a display device including first pixels emitting lights or transmitting and reflecting an external light, and second pixels corresponding to the first pixels respectively, includes calculating light emission amounts necessary for the respective first pixels for realizing an image signal, receiving the light information on the amount of the external light incident to the first and second pixels, calculating a reflection light amount of a reflection device according to the external light amount, comparing the light emission amounts necessary for the respective first pixels with the reflection light amount, and adjusting light emission amounts of the respective first pixels according to a result of the comparing.
    Type: Application
    Filed: February 11, 2015
    Publication date: August 20, 2015
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Seong-Mok CHO, Yong Hae KIM, Tae-Youb KIM, Chil Seong AH, Juhee SONG, Hojun RYU, Hye Yong CHU
  • Patent number: 9110347
    Abstract: A method of fabricating a display apparatus includes forming a lower electrode on a lower substrate, forming a partition structure and an ink-injection tube connected to one end of the partition structure, the partition structure including first partitions, and second partitions, and cell regions defined by the first and second partitions, covering the partition structure with an upper electrode, and injecting an electronic ink through the ink-injection tube to fill the cell regions of the partition structure.
    Type: Grant
    Filed: September 19, 2013
    Date of Patent: August 18, 2015
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Kyung Soo Suh, Seung Youl Kang, Joo Yeon Kim, Seongdeok Ahn, Hojun Ryu
  • Publication number: 20150185580
    Abstract: Provided is an electrochromic device. The electrochromic device includes a lower substrate; a lower electrode on the lower substrate; a lower electrochromic layer arranged on the lower electrode, wherein the lower electrochromic layer includes first nano particles, electrochromic molecules, and second nano particles, the electrochromic molecules are provided on each of the first nano particles, the second nano particles have an aspect ratio larger than and electrical conductivity higher than the first nano particles; electrolyte provided on the lower electrochromic layer; and an upper electrode on the electrolyte.
    Type: Application
    Filed: June 4, 2014
    Publication date: July 2, 2015
    Inventors: Seong-Mok CHO, Tae-Youb KIM, Chil Seong AH, Hojun RYU
  • Publication number: 20150160511
    Abstract: Provided is a display device and a method of manufacturing the same. The display device includes a reflective display part including a first cathode electrode and a first anode electrode and a liquid crystal layer, a light emitting display part including a second cathode electrode and a second anode electrode and a light emission film, and a thin film transistor part being electrically connected to the first and second anode electrodes. The light emitting display part further includes a bank disposed on one side of the second anode electrode between the second anode electrode and the light emission film.
    Type: Application
    Filed: May 23, 2014
    Publication date: June 11, 2015
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Yong Hae KIM, Gi Heon KIM, Hojun RYU, Chi-Sun HWANG, Jong-Heon YANG, Sang Chul LIM, Jae Bon KOO, Jonghee LEE, Jeong Ik LEE
  • Publication number: 20150146153
    Abstract: Provided are a display device and a method of manufacturing the same. The display device includes a first substrate, a second substrate facing the first substrate and separated from the first substrate, a plurality of liquid crystal parts disposed between the first and second substrates, and separated in a horizontal direction from each other, spacers for separating the liquid crystal parts between the first and the second substrates, and immobilization patterns disposed in each of the liquid crystal parts, and including an optically active material.
    Type: Application
    Filed: May 21, 2014
    Publication date: May 28, 2015
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Gi Heon KIM, Hojun RYU, Won Jae LEE, Yong Hae KIM, Chul Am KIM
  • Publication number: 20150146134
    Abstract: Provided are a liquid crystal display device and a liquid crystal display device including the same. The liquid crystal display device includes a first substrate, a second substrate facing and separated from the first substrate, a liquid crystal layer disposed between the first and second substrates, and a light source providing light to the liquid crystal layer. The liquid crystal layer includes cholesteric liquid crystal and a dichromic dye. The cholesteric liquid crystal includes nematic liquid crystal and an optically active material, and selectively reflects light having a certain wavelength, and the dichromic dye transmits light selectively reflected from the cholesteric liquid crystal. An amount of the dichromic dye is about 0.01 to about 10 wt % based on a total amount of the liquid crystal layer.
    Type: Application
    Filed: May 15, 2014
    Publication date: May 28, 2015
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Gi Heon KIM, Won Jae LEE, Chul Am KIM, Hojun RYU
  • Patent number: 9025233
    Abstract: Disclosed is a dual mode function pixel that operates either in a first mode or in a second mode according to the intensity of a projected light to have a high visibility regardless of the intensity of projected light. The dual mode function pixel includes: a first membrane on which a self-luminescent element is formed; one or more membranes formed to surround the first membrane; and a lower layer formed below the first membrane and the one or more membranes to be spaced apart from the first membrane and the one or more membranes. The dual mode function pixel is controlled such that the self-luminescent element is driven either to emit light in a first mode operation or to selectively reflect a projected light by utilizing an interference of light generated between the first to one or more membranes and the lower layer in a second mode operation.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: May 5, 2015
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Hojun Ryu, Sang Hee Park
  • Patent number: 8993991
    Abstract: Provided are semiconductor devices and methods of manufacturing the same. The semiconductor device includes a substrate including a first top surface, a second top surface lower in level than the first top surface, and a first perpendicular surface disposed between the first and second top surfaces, a first source/drain region formed under the first top surface, a first nanowire extended from the first perpendicular surface in one direction and being spaced apart from the second top surface, a second nanowire extended from a side surface of the first nanowire in the one direction, being spaced apart from the second top surface, and including a second source/drain region, a gate electrode on the first nanowire, and a dielectric layer between the first nanowire and the gate electrode.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: March 31, 2015
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Dongwoo Suh, Sung Bock Kim, Hojun Ryu
  • Patent number: 8987718
    Abstract: Disclosed are dual mode display devices and methods of manufacturing the same. The dual mode display device may include a first substrate, a first electrode on the first substrate, a second substrate opposite to the first electrode and the first substrate, a second electrode between the second substrate and the first electrode, a third electrode between the first electrode and the second electrode, an optic switching layer between the first electrode and the third electrode, and an organic light-emitting layer between the second electrode and the third electrode.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: March 24, 2015
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jae Bon Koo, Hojun Ryu, Chi-Sun Hwang, Jeong Ik Lee, Hye Yong Chu
  • Patent number: 8901548
    Abstract: Provided is a dual-mode display including a substrate, and a plurality of sub pixels on the substrate. Each of the sub pixels may include an emissive device, a reflective optical filter provided on a surface of the emissive device, and an optical shutter provided on other surface of the emissive device.
    Type: Grant
    Filed: June 18, 2013
    Date of Patent: December 2, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Joon Tae Ahn, Jeong Ik Lee, Jaehyun Moon, Seung Koo Park, Nam Sung Cho, Doo-Hee Cho, Jun-Han Han, Joo Hyun Hwang, Jin Wook Shin, Jong Tae Lim, Chul Woong Joo, Jin Woo Huh, Chi-Sun Hwang, Hojun Ryu, Jae Bon Koo, Hye Yong Chu
  • Publication number: 20140168595
    Abstract: A liquid crystal display device may include a liquid crystal and a coloring material including at least one of yellow, magenta, and cyan coloring materials. The coloring material may have high solubility and dispersion stability on the liquid crystal, and thus, it can be used for a liquid crystal layer. The liquid crystal display device may include a partition delimiting pixels, and the liquid crystal layer may be provided in the pixels. The pixels may include first, second, and third pixels. The coloring materials in the first, second, and third liquid crystal layers may be adjusted, in terms of kind, composition, and weight percentage, to control colors to be displayed by the first, second, and third pixels.
    Type: Application
    Filed: June 4, 2013
    Publication date: June 19, 2014
    Inventors: Gi Heon KIM, Hojun RYU
  • Publication number: 20140158997
    Abstract: Provided is a dual-mode display including a substrate, and a plurality of sub pixels on the substrate. Each of the sub pixels may include an emissive device, a reflective optical filter provided on a surface of the emissive device, and an optical shutter provided on other surface of the emissive device.
    Type: Application
    Filed: June 18, 2013
    Publication date: June 12, 2014
    Inventors: Joon Tae Ahn, Jeong Ik Lee, Jaehyun Moon, Seung Koo Park, Nam Sung Cho, Doo-Hee Cho, Jun-Han Han, Joo Hyun Hwang, Jin Wook Shin, Jong Tae Lim, Chul Woong Joo, Jin Woo Huh, Chi-Sun Hwang, Hojun Ryu, Jae Bon Koo, Hye Yong Chu
  • Publication number: 20140160551
    Abstract: Provided are methods of modifying a surface of carbon black and display devices with the carbon black. The display device may include an upper electrode, a lower electrode spaced apart from and facing the upper electrode, and a pigment between the upper and lower electrodes to include a plurality of micro-capsules. Each of the micro-capsules may include carbon black, whose surface may be modified to have hydrophobicity.
    Type: Application
    Filed: September 3, 2013
    Publication date: June 12, 2014
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Chul Am KIM, Joo Yeon KIM, Hojun RYU
  • Publication number: 20140104676
    Abstract: A method of fabricating a display apparatus includes forming a lower electrode on a lower substrate, forming a partition structure and an ink-injection tube connected to one end of the partition structure, the partition structure including first partitions, and second partitions, and cell regions defined by the first and second partitions, covering the partition structure with an upper electrode, and injecting an electronic ink through the ink-injection tube to fill the cell regions of the partition structure.
    Type: Application
    Filed: September 19, 2013
    Publication date: April 17, 2014
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Kyung Soo SUH, Seung Youl KANG, Joo Yeon KIM, Seongdeok AHN, Hojun RYU
  • Publication number: 20140014915
    Abstract: Disclosed are dual mode display devices and methods of manufacturing the same. The dual mode display device may include a first substrate, a first electrode on the first substrate, a second substrate opposite to the first electrode and the first substrate, a second electrode between the second substrate and the first electrode, a third electrode between the first electrode and the second electrode, an optic switching layer between the first electrode and the third electrode, and an organic light-emitting layer between the second electrode and the third electrode.
    Type: Application
    Filed: February 8, 2013
    Publication date: January 16, 2014
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Jae Bon KOO, Hojun RYU, Chi-Sun HWANG, Jeong Ik LEE, Hye Yong CHU
  • Publication number: 20130314633
    Abstract: A dual mode display apparatus according to the inventive concept includes a lower substrate, a first lower electrode on the lower substrate, a light switching layer on the first lower electrode, a first upper electrode on the light switching layer, a passivation layer on the first upper electrode, a contact plug connected to the first upper electrode and penetrating the passivation layer, a second lower electrode on the contact plug and the passivation layer, an organic light-emitting layer on the second lower electrode, a second upper electrode on the organic light-emitting layer, and an upper substrate on the second upper electrode.
    Type: Application
    Filed: March 14, 2013
    Publication date: November 28, 2013
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Jae Bon KOO, Hojun RYU, Chi-Sun HWANG, JEONG IK LEE, Hye Yong CHU
  • Publication number: 20130314634
    Abstract: Provided are a dual-mode display device and a method of manufacturing the same. The device includes a lower substrate, an upper substrate facing the lower substrate, a thin-film transistor portion between the upper substrate and the lower substrate, a first anode on one side of the thin-film transistor portion, a first cathode between the first anode and the upper substrate, an organic light-emitting layer between the first cathode and the first anode, a second anode on the other side of the thin-film transistor portion, a second cathode between the second anode and the upper substrate, or the second anode and the lower substrate, and a optical switching layer between the second cathode and the second anode.
    Type: Application
    Filed: March 14, 2013
    Publication date: November 28, 2013
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Jae Bon KOO, JEONG IK LEE, Chi-Sun HWANG, Hojun RYU, Hye Yong CHU
  • Publication number: 20120145999
    Abstract: Provided are semiconductor devices and methods of manufacturing the same. The semiconductor device includes a substrate including a first top surface, a second top surface lower in level than the first top surface, and a first perpendicular surface disposed between the first and second top surfaces, a first source/drain region formed under the first top surface, a first nanowire extended from the first perpendicular surface in one direction and being spaced apart from the second top surface, a second nanowire extended from a side surface of the first nanowire in the one direction, being spaced apart from the second top surface, and including a second source/drain region, a gate electrode on the first nanowire, and a dielectric layer between the first nanowire and the gate electrode.
    Type: Application
    Filed: July 29, 2011
    Publication date: June 14, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Dongwoo Suh, Sung Bock Kim, Hojun Ryu
  • Patent number: 7899285
    Abstract: A leaky plasmon mode directional coupler and a polarization detection module for a magneto-optical pickup head, which uses the leaky plasmon mode directional coupler, are provided. The leaky plasmon mode directional coupler is manufactured by integrating a planar waveguide and a leaky plasmon mode waveguide, which share a cladding layer with each other, into one body. The polarization detection module includes the leaky plasmon mode directional coupler, a first photo diode, which is formed on the leaky plasmon mode directional coupler, and a second photo diode, which is located at an output port of the planar waveguide.
    Type: Grant
    Filed: March 4, 2004
    Date of Patent: March 1, 2011
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Yongwoo Park, Hyeon Bong Pyo, Dong Woo Suh, Yeungjoon Sohn, Hojun Ryu, Mun Cheol Paek
  • Publication number: 20080135758
    Abstract: Provided are a bolometer and a method of manufacturing the bolometer. The bolometer includes: a semiconductor substrate comprising a detection circuit; a reflective layer disposed in an area of a surface of the semiconductor substrate; metal pads disposed on the surface of the semiconductor substrate beside both sides of the reflective layer to keep predetermined distances from the both sides of the reflective layer; and a sensor structure forming a space corresponding to quarter of an infrared wavelength (?/4) from a surface of the reflective layer and positioned above the semiconductor substrate, wherein the sensor structure includes: a body including a polycrystalline resistive layer formed of one of doped Si and Si1-xGex (where x=0.2˜0.5) to be positioned above the reflective layer; and support arms positioned outside the body to be electrically connected to the metal pads.
    Type: Application
    Filed: July 12, 2007
    Publication date: June 12, 2008
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Woo Seok YANG, Seong Mok Cho, Hojun Ryu, Byoung Gon Yu