Patents by Inventor Chi-Sun Hwang

Chi-Sun Hwang 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: 20180335281
    Abstract: Provided is an active camouflage device including a reflective layer, a first electrode disposed on the reflective layer, a second electrode facing the first electrode, and an electrolyte provided between the first and second electrodes. The first electrode includes a transparent electrode, and the second electrode includes a metal mesh.
    Type: Application
    Filed: April 10, 2018
    Publication date: November 22, 2018
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Tae-Youb KIM, Juhee SONG, Chil Seong AH, Seong-Mok CHO, Sujung KIM, Joo Yeon KIM, Hojun RYU, JEONG IK LEE, Sang Hoon CHEON, Chi-Sun HWANG
  • Patent number: 10073315
    Abstract: A display device includes a polymer layer including dichroic dyes and a liquid crystal, which is not mixed or reacted with the polymer layer, dispersed in the polymer layer. The polymer and the liquid crystal have different refractive indices from each other.
    Type: Grant
    Filed: January 26, 2016
    Date of Patent: September 11, 2018
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Gi Heon Kim, Yong Hae Kim, Chi-Sun Hwang
  • Publication number: 20180246000
    Abstract: Provided is a pressure sensing element including a first electrode, a pressure sensing unit on the first electrode, a second electrode disposed on the pressure sensing unit and having first and second points on a top surface thereof, a first elastic member on the second electrode, and a second elastic member on the first elastic electrode, wherein a thickness of the first elastic member decreases from the first point toward the second point, and a thickness of the second elastic member increases from the second point toward the first point.
    Type: Application
    Filed: February 7, 2018
    Publication date: August 30, 2018
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Seong Hyun KIM, Su Jae LEE, Kyoung Ik CHO, Chi-Sun HWANG
  • Publication number: 20180231856
    Abstract: An electrochromic mirror includes a first electrode structure, a second electrode structure provided on the first electrode structure, and an electrolyte provided between the first and second electrode structures. Here, the first electrode structure further includes a metal layer, a graphene layer disposed on the metal layer, and an interface part disposed between the metal layer and the graphene layer. The interface part includes a micro/nano-porous polymer material.
    Type: Application
    Filed: January 8, 2018
    Publication date: August 16, 2018
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Joo Yeon KIM, JEONG IK LEE, Sang Hoon CHEON, Nam Sung CHO, Seong-Mok CHO, Yong Hae KIM, Tae-Youb KIM, Hojun RYU, Chil Seong AH, Chi-Sun HWANG
  • Patent number: 10012886
    Abstract: Disclosed is an optical modulator. An optical modulator comprises a substrate, an upper transparent electrode on the substrate, a partition wall providing a chamber between the substrate and the upper transparent electrode, an optical modulation member provided in the chamber and disposed on the substrate, and an electrolyte filling the chamber and including a first metal in an ionic state. The optical modulation member comprises a reflection layer on the substrate, and a lower transparent electrode on the reflection layer.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: July 3, 2018
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Seong-Mok Cho, Tae-Youb Kim, Seung Youl Lee, Yong Hae Kim, Hojun Ryu, Juhee Song, Chil Seong Ah, Jeong Ik Lee, Chi-Sun Hwang
  • Patent number: 10008155
    Abstract: Provided is a gate driving circuit. The gate driving circuit includes an ith modulation circuit and an ith line selection circuit (where i is a natural number greater than 1). The ith modulation circuit outputs an ith modulation voltage to an ith line selection circuit based on received first to third control signals. The ith line selection circuit includes a memory transistor that is turned on or turned off according to a level of the received ith modulation voltage.
    Type: Grant
    Filed: July 27, 2016
    Date of Patent: June 26, 2018
    Assignees: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIV
    Inventors: Chunwon Byun, Jong-Heon Yang, Sung-Min Yoon, Kyoung Ik Cho, Chi-Sun Hwang
  • Publication number: 20180157076
    Abstract: Provided are a method for manufacturing a light emitting apparatus, the light emitting apparatus, and a window. The method for manufacturing the light emitting apparatus includes preparing a liquid crystal device including a support substrate, a first electrode, a liquid crystal layer, and a sacrificial structure, separating the sacrificial structure from the liquid crystal layer to expose one surface of the liquid crystal layer, and forming a second electrode on the one surface of the liquid crystal layer.
    Type: Application
    Filed: July 20, 2017
    Publication date: June 7, 2018
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Gi Heon KIM, Sujung KIM, Yong Hae KIM, Chi-Sun HWANG
  • Publication number: 20180136536
    Abstract: Provided is an optoelectronic element including a first substrate, a first electrode on the first substrate, a first lens pattern disposed on the first electrode and including a liquid crystal and a black dye molecule, a second lens pattern disposed on the first lens pattern, and a second electrode on the second lens pattern, wherein the black dye molecule includes about 1 to 4 azo groups and about 2 to 5 aromatic cyclic compounds.
    Type: Application
    Filed: May 4, 2017
    Publication date: May 17, 2018
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Gi Heon KIM, Yong Hae KIM, Chi-Sun HWANG
  • Publication number: 20180136507
    Abstract: Provided are a liquid crystal device, a method for manufacturing a liquid crystal device, and a method for operating a liquid crystal device. According to the inventive concept, a method for manufacturing a liquid crystal device includes preparing a precursor solution including a monomer, liquid crystal molecules, a first dye, a second dye, and a third dye, and performing a polymerization process of the precursor solution to form a liquid crystal layer. The first dye, the second dye, and the third dye may reflect lights having different wavelengths from each other.
    Type: Application
    Filed: July 13, 2017
    Publication date: May 17, 2018
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Sujung KIM, Gi Heon KIM, Yong Hae KIM, Chi-Sun HWANG
  • Patent number: 9952460
    Abstract: Provided is a display device. The display device includes a lower display element where a substrate, a first lower electrode, a liquid crystal part, and a second lower electrode are sequentially stacked, an upper display element stacked vertical to the lower display element, where a first upper electrode, a light emitting part, a second upper electrode, and a protective part are sequentially stacked, and a middle part configured to deliver a driving signal to the lower and upper display elements, between the lower and upper display elements.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: April 24, 2018
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Jong-Heon Yang, Jae Bon Koo, Byoung-Hwa Kwon, Gi Heon Kim, Yong Hae Kim, Hojun Ryu, Chan Woo Park, Chunwon Byun, Hyunkoo Lee, Jong Tae Lim, Kyoung Ik Cho, Seong-Mok Cho, Hye Yong Chu, Chi-Sun Hwang
  • Patent number: 9904251
    Abstract: A holographic display apparatus includes a light source unit, a spatial light modulator, and a spatial light modulator control circuit for controlling the spatial light modulator, the spatial light modulator control circuit including a data driving circuit for providing a data voltage to a signal line, a demultiplexer circuit which includes a plurality of switching elements connected to the signal line and sequentially turned on, and transfers the data voltage to a transfer line through a turned-on switching element among the switching elements, and a first element connected between the transfer line and a data line, passing a current flowing from the transfer line to the data line, and blocking a current flowing from the data line to the transfer line.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: February 27, 2018
    Assignees: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, MVTECH
    Inventors: Chunwon Byun, Jae-Eun Pi, Yong Hae Kim, Hakyun Lee, Chi-Sun Hwang
  • Patent number: 9897887
    Abstract: Provided is an electrochromic device, which may prevent a damage of an electrode and include a lower substrate and an upper substrate configured to face each other with an electrolyte layer therebetween, an upper electrode provided between the electrolyte layer and the upper substrate, a lower electrode provided between the electrolyte layer and the lower substrate, an upper ion reactive layer provided between the upper electrode and the electrolyte layer, and a lower protection layer provided between the lower electrode and the electrolyte layer and configured to prohibit the lower electrode and the electrolyte layer from contacting.
    Type: Grant
    Filed: August 11, 2016
    Date of Patent: February 20, 2018
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Joo Yeon Kim, Hojun Ryu, Sang Hoon Cheon, Seong-Mok Cho, Ji-Young Oh, Tae-Youb Kim, Chil Seong Ah, Yong Hae Kim, Jeong Ik Lee, Nam Sung Cho, Chi-Sun Hwang
  • Publication number: 20180026104
    Abstract: Provided are a p-type oxide semiconductor, a method of forming the p-type oxide semiconductor, and a transistor with the p-type oxide semiconductor. The p-type oxide semiconductor includes an alkali metal and a tin oxide.
    Type: Application
    Filed: June 13, 2017
    Publication date: January 25, 2018
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Sung Haeng CHO, Sooji NAM, Chi-Sun HWANG, Su Jae LEE, Kyoung Ik CHO, Jae-Eun PI
  • Publication number: 20180011384
    Abstract: Disclosed is an optical modulator. An optical modulator comprises a substrate, an upper transparent electrode on the substrate, a partition wall providing a chamber between the substrate and the upper transparent electrode, an optical modulation member provided in the chamber and disposed on the substrate, and an electrolyte filling the chamber and including a first metal in an ionic state. The optical modulation member comprises a reflection layer on the substrate, and a lower transparent electrode on the reflection layer.
    Type: Application
    Filed: March 17, 2017
    Publication date: January 11, 2018
    Inventors: Seong-Mok CHO, Tae-Youb KIM, Seung Youl LEE, Yong Hae KIM, Hojun RYU, Juhee SONG, Chil Seong AH, Jeong Ik LEE, Chi-Sun HWANG
  • Publication number: 20180012861
    Abstract: Provided is a method of manufacturing an electronic apparatus which includes preparing a substrate having a first Young's modulus, disposing a thin film having a second Young's modulus greater than the first Young's modulus on the substrate, disposing an electronic device on the thin film, and disposing a capping layer configured to cover the electronic device on the thin film.
    Type: Application
    Filed: June 23, 2017
    Publication date: January 11, 2018
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Ji-Young OH, Joo Yeon KIM, Jae Bon KOO, Bock Soon NA, Nae-Man PARK, Chan Woo PARK, Sang Seok LEE, Soon Won JUNG, Chi-Sun HWANG, Keunsoo LEE
  • Publication number: 20170261662
    Abstract: Provided is an optical device manufacturing method including forming a reflection layer on a substrate, forming a dielectric layer on the reflection layer, and inserting a phase change material layer into the dielectric layer, wherein the inserting of the phase change material layer includes adjusting a position of the phase change material layer to be inserted into the dielectric layer according to a wavelength of incident light incident to the dielectric layer.
    Type: Application
    Filed: January 23, 2017
    Publication date: September 14, 2017
    Inventors: Seung Youl LEE, Yong Hae KIM, Tae-Youb KIM, Seong-Mok CHO, Han Byeol KANG, Hanna KIM, Chi-Sun HWANG
  • Patent number: 9728149
    Abstract: A display panel includes pixels connected to each of gate lines and data lines. Each of the pixels includes a first transistor connected between a corresponding data line among the data lines and a first node and configured to deliver a data signal of the corresponding data line to the first node in response to an input signal received through a corresponding gate line among the gate lines, a reflective element circuit connected to the first node, and configured to implement the reflective mode in response to a signal of the first node when a first mode selection signal indicates a reflective mode, an emissive element circuit connected to a second node, and configured to implement the emissive mode in response to the signal of the first node when the mode selection mode indicates an emissive mode.
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: August 8, 2017
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Chunwon Byun, Jae-Eun Pi, Kyoung Ik Cho, Hye Yong Chu, Chi-Sun Hwang
  • Publication number: 20170219902
    Abstract: Provided is an electrochromic device, which may prevent a damage of an electrode and include a lower substrate and an upper substrate configured to face each other with an electrolyte layer therebetween, an upper electrode provided between the electrolyte layer and the upper substrate, a lower electrode provided between the electrolyte layer and the lower substrate, an upper ion reactive layer provided between the upper electrode and the electrolyte layer, and a lower protection layer provided between the lower electrode and the electrolyte layer and configured to prohibit the lower electrode and the electrolyte layer from contacting.
    Type: Application
    Filed: August 11, 2016
    Publication date: August 3, 2017
    Inventors: Joo Yeon KIM, Hojun RYU, Sang Hoon CHEON, Seong-Mok CHO, Ji-Young OH, Tae-Youb KIM, Chil Seong AH, Yong Hae KIM, Jeong Ik LEE, Nam Sung CHO, Chi-Sun HWANG
  • Publication number: 20170210995
    Abstract: A color display device includes a plurality of pixels. Each of the pixels includes a first transparent electrode and a second transparent electrode, opposing to each other, a polymer layer between the first transparent electrode and the second transparent electrode, a first coloring material dispersed in the polymer layer, liquid crystals provided in the polymer layer, and a second coloring material dispersed in the liquid crystals. The first coloring material and the second coloring material presents different colors, and each of the first coloring material and the second coloring material includes at least one of a red coloring material, a green coloring material, a blue coloring material, a yellow coloring material, a cyan coloring material, and a magenta coloring material.
    Type: Application
    Filed: July 18, 2016
    Publication date: July 27, 2017
    Inventors: Gi Heon KIM, Yong Hae KIM, Chi-Sun HWANG
  • Patent number: 9695362
    Abstract: A color display device includes a plurality of pixels. Each of the pixels includes a first transparent electrode and a second transparent electrode, opposing to each other, a polymer layer between the first transparent electrode and the second transparent electrode, a first coloring material dispersed in the polymer layer, liquid crystals provided in the polymer layer, and a second coloring material dispersed in the liquid crystals. The first coloring material and the second coloring material presents different colors, and each of the first coloring material and the second coloring material includes at least one of a red coloring material, a green coloring material, a blue coloring material, a yellow coloring material, a cyan coloring material, and a magenta coloring material.
    Type: Grant
    Filed: July 18, 2016
    Date of Patent: July 4, 2017
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Gi Heon Kim, Yong Hae Kim, Chi-Sun Hwang