Patents by Inventor Soon-Joon Rho

Soon-Joon Rho 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: 11156874
    Abstract: A liquid crystal photoalignment agent includes: a copolymer of diamine and dianhydride; and a compound Formula 1 below, wherein an amount of the compound of Formula 1 is less than about 10 weight %, based on a total weight of the liquid crystal photoalignment agent: R1 is a substituted or unsubstituted tetravalent organic group derived from an acid dianhydride, wherein the acid dianhydride is at least one of an aliphatic cyclic acid dianhydride or an aromatic acid dianhydride, R2 is a substituted or unsubstituted trivalent organic group derived from an aromatic diamine, at least one of R1 and R2 is substituted with CF3 or a silyl group, R3 is a residue of a compound including a substituted or unsubstituted aromatic group with a carbon number that is equal to or greater than 6, n is 1 to 5, and * represents a point of attachment.
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: October 26, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Yeon Cu Kim, Ki Chul Shin, Soon Joon Rho
  • Patent number: 11078422
    Abstract: An LCD panel, comprises substrates facing each other, a liquid crystal layer disposed between the substrates and liquid crystal alignment layers, each sandwiched between the liquid crystal layer and a respective one of the substrates, wherein the liquid crystal alignment layers comprises hydrocarbon derivative having perfluorocarbon group.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: August 3, 2021
    Inventors: Shin Woong Kang, Kundu Sudarshan, Byung Wook Ahn, Keun Chan Oh, Chang Hun Lee, Soon Joon Rho, Jae Jin Lyu
  • Patent number: 10768498
    Abstract: A liquid crystal display device includes a first substrate, a second substrate facing the first substrate, and a liquid crystal layer interposed between the first substrate and the second substrate. The liquid crystal layer includes liquid crystal molecules having a negative dielectric anisotropy, a response speed of about 4.0 ms or less, and a rotational viscosity of about 47 mPa·S to about 75 mPa·S.
    Type: Grant
    Filed: May 1, 2017
    Date of Patent: September 8, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Soon Joon Rho, Kyungmin Kim, Jin-Lak Kim, Hyelim Jang
  • Publication number: 20200073182
    Abstract: A liquid crystal photoalignment agent includes: a copolymer of diamine and dianhydride; and a compound Formula 1 below, wherein an amount of the compound of Formula 1 is less than about 10 weight %, based on a total weight of the liquid crystal photoalignment agent: R1 is a substituted or unsubstituted tetravalent organic group derived from an acid dianhydride, wherein the acid dianhydride is at least one of an aliphatic cyclic acid dianhydride or an aromatic acid dianhydride, R2 is a substituted or unsubstituted trivalent organic group derived from an aromatic diamine, at least one of R1 and R2 is substituted with CF3 or a silyl group, R3 is a residue of a compound including a substituted or unsubstituted aromatic group with a carbon number that is equal to or greater than 6, n is 1 to 5, and * represents a point of attachment.
    Type: Application
    Filed: August 30, 2019
    Publication date: March 5, 2020
    Inventors: Yeon Cu KIM, Ki Chul SHIN, Soon Joon RHO
  • Patent number: 10061145
    Abstract: A liquid crystal display device, including: a display substrate including a first base substrate, a switching device disposed on the first base substrate, a color filter layer disposed on the switching device, and a first electrode disposed on the color filter layer; a counter display substrate including a second base substrate and a second electrode disposed on the second base substrate and facing the first electrode, wherein the counter display substrate is disposed separately from and facing the display substrate; a liquid crystal layer disposed between the display substrate and the counter display substrate, wherein the liquid crystal layer includes at least one first liquid crystal compound represented by Formula 1 and at least one second liquid crystal compound represented by Formula 2; and a light-shielding spacer disposed between the display substrate and the counter display substrate and maintaining a thickness of the liquid crystal layer: wherein in Formula 1 and Formula 2, each of R11—*, R
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: August 28, 2018
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Si Heun Kim, Soon Joon Rho, Jong Ho Son, Kyung Hae Park, Joon Hyung Park, Beom Soo Shin, Hye Lim Jang, Kang Seob Jeong
  • Publication number: 20180208850
    Abstract: An LCD panel, comprises substrates facing each other, a liquid crystal layer disposed between the substrates and liquid crystal alignment layers, each sandwiched between the liquid crystal layer and a respective one of the substrates, wherein the liquid crystal alignment layers comprises hydrocarbon derivative having perfluorocarbon group.
    Type: Application
    Filed: March 20, 2018
    Publication date: July 26, 2018
    Inventors: Shin Woong KANG, Kundu SUDARSHAN, Byung Wook AHN, Keun Chan OH, Chang Hun LEE, Soon Joon RHO, Jae Jin LYU
  • Patent number: 9988576
    Abstract: A liquid crystal display device comprises a display panel including a first base substrate, a switching element disposed on the first base substrate, a color filter layer disposed on the switching element, and a pixel electrode disposed on the color filter layer; a counter display panel including a second base substrate and a common electrode disposed on the second base substrate and facing the display panel; a liquid crystal layer disposed between the display panel and the counter display panel and having negative dielectric anisotropy, wherein the liquid crystal layer includes at least one compound represented by Formula 1 below, and the liquid crystal layer does not include a compound represented by Formula A below; and a light-blocking spacer disposed on the display panel and including an area overlapping the switching element, and maintaining the thickness of the liquid crystal layer.
    Type: Grant
    Filed: June 20, 2016
    Date of Patent: June 5, 2018
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Soon Joon Rho, Joon Hyung Park, Jong Ho Son, Beom Soo Shin, Kang Seob Jeong, Si Heun Kim, Kyung Hae Park, Keun Chan Oh, Hye Lim Jang
  • Patent number: 9944856
    Abstract: An LCD panel, comprises substrates facing each other, a liquid crystal layer disposed between the substrates and liquid crystal alignment layers, each sandwiched between the liquid crystal layer and a respective one of the substrates, wherein the liquid crystal alignment layers comprises hydrocarbon derivative having perfluorocarbon group.
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: April 17, 2018
    Assignees: Samsung Display Co., LTD., INDUSTRIAL COOPERATION FOUNDATION CHONBUK NATIONAL UNIVERSITY
    Inventors: Shin Woong Kang, Kundu Sudarshan, Byung Wook Ahn, Keun Chan Oh, Chang Hun Lee, Soon Joon Rho, Jae Jin Lyu
  • Publication number: 20170261791
    Abstract: A liquid crystal display device, including: a display substrate including a first base substrate, a switching device disposed on the first base substrate, a color filter layer disposed on the switching device, and a first electrode disposed on the color filter layer; a counter display substrate including a second base substrate and a second electrode disposed on the second base substrate and facing the first electrode, wherein the counter display substrate is disposed separately from and facing the display substrate; a liquid crystal layer disposed between the display substrate and the counter display substrate, wherein the liquid crystal layer includes at least one first liquid crystal compound represented by Formula 1 and at least one second liquid crystal compound represented by Formula 2; and a light-shielding spacer disposed between the display substrate and the counter display substrate and maintaining a thickness of the liquid crystal layer: wherein in Formula 1 and Formula 2, each of R11—*, R1
    Type: Application
    Filed: November 21, 2016
    Publication date: September 14, 2017
    Inventors: Si Heun KIM, Soon Joon RHO, Jong Ho SON, Kyung Hae PARK, Joon Hyung PARK, Beom Soo SHIN, Hye Lim JANG, Kang Seob JEONG
  • Publication number: 20170235166
    Abstract: A liquid crystal display device includes a first substrate, a second substrate facing the first substrate, and a liquid crystal layer interposed between the first substrate and the second substrate. The liquid crystal layer includes liquid crystal molecules having a negative dielectric anisotropy, a response speed of about 4.0 ms or less, and a rotational viscosity of about 47 mPa·S to about 75 mPa·S.
    Type: Application
    Filed: May 1, 2017
    Publication date: August 17, 2017
    Inventors: Soon Joon RHO, Kyungmin KIM, Jin-Lak KIM, Hyelim JANG
  • Publication number: 20170174990
    Abstract: A liquid crystal display device comprises a display panel including a first base substrate, a switching element disposed on the first base substrate, a color filter layer disposed on the switching element, and a pixel electrode disposed on the color filter layer; a counter display panel including a second base substrate and a common electrode disposed on the second base substrate and facing the display panel; a liquid crystal layer disposed between the display panel and the counter display panel and having negative dielectric anisotropy, wherein the liquid crystal layer includes at least one compound represented by Formula 1 below, and the liquid crystal layer does not include a compound represented by Formula A below; and a light-blocking spacer disposed on the display panel and including an area overlapping the switching element, and maintaining the thickness of the liquid crystal layer.
    Type: Application
    Filed: June 20, 2016
    Publication date: June 22, 2017
    Inventors: Soon Joon RHO, Joon Hyung PARK, Jong Ho SON, Beom Soo SHIN, Kang Seob JEONG, Si Heun KIM, Kyung Hae PARK, Keun Chan OH, Hye Lim JANG
  • Patent number: 9658507
    Abstract: A liquid crystal display device includes a first substrate, a second substrate facing the first substrate, and a liquid crystal layer interposed between the first substrate and the second substrate. The liquid crystal layer includes liquid crystal molecules having a negative dielectric anisotropy, a response speed of about 4.0 ms or less, and a rotational viscosity of about 47 mPa·S to about 75 mPa·S.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: May 23, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Soon Joon Rho, Kyungmin Kim, Jin-Lak Kim, Hyelim Jang
  • Publication number: 20170015904
    Abstract: A liquid crystal composition includes a first compound represented by Chemical Formula 1. In Chemical Formula 1, R1 is an alkyl group having a carbon number of 1 to 10 or a cycloalkyl group having a total carbon number of 3 to 16, and R2 is an alkoxy group having a carbon number of 1 to 10. The liquid crystal composition does not include a compound having an alkenyl as a substituent group, and the liquid crystal composition does not include a compound represented by Chemical Formula 4. In Chemical Formula 4, R5 and R5? are independently an alkyl group having a carbon number of 1 to 10 or an alkoxy group having a carbon number of 1 to 10.
    Type: Application
    Filed: January 21, 2016
    Publication date: January 19, 2017
    Inventors: Soon Joon Rho, Sun Young Kwon, Kyung Min Kim, Se Ran Kim, Si Heun Kim, Hoi-Lim Kim, Beom-Soo Shin, Keun Chan Oh, Hye Kim Jang
  • Publication number: 20170010495
    Abstract: A method for forming a display device includes forming a liquid crystal layer between a first substrate and a second substrate spaced apart from the first substrate, in which the liquid crystal layer includes a liquid crystal composition including a reactive mesogen, applying an electric field to the liquid crystal layer, firstly curing the liquid crystal layer at a temperature from about ?20° C. to about 60° C., and secondly curing the liquid crystal layer without applying the electric field. The liquid crystal composition includes the reactive mesogen in an amount exceeding 0 percent by weight and equal to or smaller than about 30 percent by weight relative to a total weight of the liquid crystal composition.
    Type: Application
    Filed: September 22, 2016
    Publication date: January 12, 2017
    Applicant: PUSAN NATIONAL UNIVERSITY INDUSTRY-UNIVERSITY
    Inventors: SOON JOON RHO, HYUNGGUEN YOON, HYELIM JANG, HYEOKJIN LEE, JUNG WOOK KIM, DONG HAN SONG, TAE HOON YOON
  • Patent number: 9487699
    Abstract: A liquid crystal display panel includes a first substrate including a pixel electrode, a second substrate a second substrate including a common electrode and disposed opposite to the first substrate, and a liquid crystal layer between the first substrate and the second substrate, where the liquid crystal layer includes liquid crystal molecules having an elastic coefficient of bend phase (K33) and an elastic coefficient of splay phase (K11), and a ratio of the elastic coefficient of bend phase (K33) to the elastic coefficient of splay phase (K11) of the liquid crystal molecules in the liquid crystal layer is in a range of about 0.96 to about 1.25.
    Type: Grant
    Filed: August 18, 2014
    Date of Patent: November 8, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Soon-Joon Rho, Kyung-Min Kim, Jin-Lak Kim, Hye-Lim Jang, Keun-Chan Oh
  • Patent number: 9417481
    Abstract: A liquid crystal display, including: a first insulation substrate; a gate line and a data line positioned on the first insulation substrate and crossing each other; a first passivation layer positioned on the gate line and the data line; a pixel electrode positioned on the first passivation layer; an alignment layer positioned on the pixel electrode; a second insulation substrate facing the first insulation substrate; and a liquid crystal positioned between the first insulation substrate and the second insulation substrate. A thickness of the alignment layer is larger than a thickness of the pixel electrode.
    Type: Grant
    Filed: December 30, 2013
    Date of Patent: August 16, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Soon Joon Rho, Kyung Min Kim, Jin-Lak Kim, Hye Lim Jang, Keun Chan Oh
  • Publication number: 20160216557
    Abstract: There is provided a liquid crystal display (LCD). The LCD includes a thin film transistor (TFT) disposed on a first substrate, a pixel electrode connected to the TFT, a second substrate that faces the first substrate, a liquid crystal layer formed between the first substrate and the second substrate, a light emitting layer positioned between the liquid crystal layer and the second substrate, a first polarizing plate positioned on a rear surface of the first substrate and including a collimating film and a second polarizing plate positioned between the light emitting layer and the liquid crystal layer.
    Type: Application
    Filed: October 26, 2015
    Publication date: July 28, 2016
    Inventors: Soon Joon RHO, Sun Young KWON, Kyung Min KIM, Keun Chan OH
  • Publication number: 20160208173
    Abstract: An LCD panel, comprises substrates facing each other, a liquid crystal layer disposed between the substrates and liquid crystal alignment layers, each sandwiched between the liquid crystal layer and a respective one of the substrates, wherein the liquid crystal alignment layers comprises hydrocarbon derivative having perfluorocarbon group.
    Type: Application
    Filed: June 19, 2015
    Publication date: July 21, 2016
    Inventors: Shin Woong KANG, Kundu SUDARSHAN, Byung Wook AHN, Keun Chan OH, Chang Hun LEE, Soon Joon RHO, Jae Jin LYU
  • Publication number: 20160209715
    Abstract: A liquid crystal display device includes a first substrate, a gate line and a first data line disposed on the first substrate and insulated from each other, a first thin film transistor connected to the gate line and the first data line, a lower pixel electrode connected to the first thin film transistor, an interlayer insulating layer disposed on the lower pixel electrode, an upper pixel electrode disposed on the interlayer insulating layer and connected to the first thin film transistor and the lower pixel electrode, a second substrate facing the first substrate, a common electrode disposed on the second substrate, and a liquid crystal layer disposed between the first substrate and the second substrate. The upper pixel electrode includes a plurality of minute branches. A ratio of an interval between the minute branches with respect to a thickness of the liquid crystal layer is 2.7 to 5.0.
    Type: Application
    Filed: December 3, 2015
    Publication date: July 21, 2016
    Inventors: Soon Joon RHO, Keun Chan OH, Hye Lim JANG
  • Patent number: 9291856
    Abstract: A liquid crystal display panel includes a first substrate, a second substrate that faces the first substrate, and a liquid crystal layer interposed between the first substrate and the second substrate. The liquid crystal layer includes liquid crystal molecules that have negative dielectric anisotropy and a nematic-isotropic phase transition temperature (Tni) of about 110° C. or more.
    Type: Grant
    Filed: May 8, 2014
    Date of Patent: March 22, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Soon Joon Rho, Kyungmin Kim, Jin-Lak Kim, Joon-Hyung Park, Hyelim Jang, Kyungseon Tak