Patents by Inventor Su-Seok Choi

Su-Seok Choi 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: 11939173
    Abstract: A transportation head for a microchip transfer device capable of minimizing mechanical and chemical damage to a microchip, a microchip transfer device having same, and a transfer method thereby, and the transportation head includes a head body having a pickup area and a dummy area; a first protruding pin disposed in the pickup area of the head body; and a liquid droplet attached to the first protruding pin.
    Type: Grant
    Filed: August 23, 2019
    Date of Patent: March 26, 2024
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Dahl-Young Khang, Sung-Hwan Hwang, Jia Lee, Sung-Soo Yoon, Su Seok Choi, Kiseok Chang, Jeong Min Moon, Soon Shin Jung, Sungpil Ryu, Jihwan Jung
  • Patent number: 11930670
    Abstract: A display device comprises a substrate; a driving transistor including a first active layer and a switching transistor including a second active layer, the first active layer and the second active layer being disposed on the substrate; a first gate insulating layer disposed on the first active layer of the driving transistor and the second active layer of the switching transistor; first and second gate electrodes disposed on the first gate insulating layer to overlap the first active layer of the driving transistor and the second active layer of the switching transistor, respectively; a first interlayer insulating layer disposed on the first gate electrode and the second gate electrode; and a second interlayer insulating layer disposed on the first interlayer insulating layer to overlap the first active layer without overlapping the second active layer in a plan view.
    Type: Grant
    Filed: May 6, 2021
    Date of Patent: March 12, 2024
    Assignees: Samsung Display Co., Ltd., Industry-University Cooperation Foundation Hanyang University ERICA Campus
    Inventors: Sang Woo Sohn, Saeroonter Oh, Joon Seok Park, Young Joon Choi, Su Hyun Kim, Jun Hyung Lim
  • Patent number: 11700753
    Abstract: An organic light emitting diode (OLED) display device includes a thin film transistor substrate including a first substrate, a thin film transistor disposed on the first substrate and a white organic light emitting diode (WOLED) electrically connected to the thin film transistor; a color filter substrate comprising a second substrate that faces the first substrate, and red, green and blue color filters disposed on the second substrate; a quantum dot pattern disposed on the WOLED of the thin film transistor substrate; and a refractive film disposed between the color filter substrate and the thin film transistor substrate provided with the quantum dot pattern.
    Type: Grant
    Filed: September 12, 2018
    Date of Patent: July 11, 2023
    Assignees: LG DISPLAY CO., LTD., UIF (UNIVERSITY INDUSTRY FOUNDATION), YONSEI UNIVERSITY
    Inventors: Young-Joo Kim, Hyo-Jun Kim, Jeong Min Moon, Su Seok Choi, Sungpil Ryu, Jihwan Jung, Kiseok Chang
  • Patent number: 11569556
    Abstract: A phase shifter includes a first substrate; a microstrip formed on the first substrate so as to extend in a first direction; a ground layer disposed with a space on the upper surface of the microstrip and having a defected ground structure (DGS) with a defected pattern formed therein; a second substrate disposed on the ground layer; and a liquid crystal layer disposed in a space between the first substrate and the second substrate, wherein DC voltage is applied between the ground layer and the microstrip.
    Type: Grant
    Filed: October 23, 2018
    Date of Patent: January 31, 2023
    Assignees: LG DISPLAY CO., LTD., UIF (UNIVERSITY INDUSTRY FOUNDATION), YONSEI UNIVERSITY
    Inventors: Byungwook Min, Hoon Bae Kim, Sung-Eun Kim, Jeong Min Moon, Su Seok Choi, Sungpil Ryu, Jihwan Jung, Kiseok Chang
  • Patent number: 11393935
    Abstract: The present disclosure provides a phototransistor and a manufacturing method therefor, the phototransistor having a defective oxide ray absorption layer introduced to an oxide semiconductor phototransistor through a solution process or a defective oxide ray absorption part introduced to an interface between a gate insulation film and an oxide semiconductor layer through interface control, which forms damage, thereby improving light absorption in the range of a visible light region.
    Type: Grant
    Filed: June 14, 2018
    Date of Patent: July 19, 2022
    Assignees: LG DISPLAY CO., LTD., UIF (UNIVERSITY INDUSTRY FOUNDATION) YONSEI UNIVERSITY
    Inventors: Hyun Jae Kim, Young Jun Tak, Jusung Chung, Jeong Min Moon, Su Seok Choi, Sungpil Ryu, Jihwan Jung, Kiseok Chang
  • Publication number: 20220006017
    Abstract: A perovskite light emitting diode having degradation of the characteristics of the light emitting device, caused by PEDOT:PSS can be improved by replacing PEDOT:PSS contained in a conventional hole transport layer with an anionic conjugated polymer having ammonium-based counter ions, and the light emission characteristics can be greatly improved by passivating defects of a perovskite light emitting layer with a hole transport layer containing a conjugated polymer and increasing crystal growth.
    Type: Application
    Filed: November 20, 2019
    Publication date: January 6, 2022
    Applicants: LG DISPLAY CO., LTD., KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION, UNIST(ULSAN NATIONAL INSTITUTE OF SCIENCE AND TECHNOLOGY)
    Inventors: Han Young WOO, Kiseok CHANG, Myoung Hoon SONG, Jeong Min MOON, Su Seok CHOI, Thanh Luan NGUYEN, Seungjin LEE, Chung Hyeon JANG
  • Publication number: 20210339964
    Abstract: A transportation head for a microchip transfer device capable of minimizing mechanical and chemical damage to a microchip, a microchip transfer device having same, and a transfer method thereby, and the transportation head includes a head body having a pickup area and a dummy area; a first protruding pin disposed in the pickup area of the head body; and a liquid droplet attached to the first protruding pin.
    Type: Application
    Filed: August 23, 2019
    Publication date: November 4, 2021
    Applicant: LG Display Co., Ltd.
    Inventors: Dahl-Young KHANG, Sung-Hwan HWANG, Jia LEE, Sung-Soo YOON, Su Seok CHOI, Kiseok CHANG, Jeong Min MOON, Soon Shin JUNG, Sungpil RYU, Jihwan JUNG
  • Publication number: 20210275062
    Abstract: A wearable photoluminescence sensor, which is portable and has improved sensitivity and accuracy, and a remote sensing apparatus comprising same, the disclosed wearable photoluminescence sensor includes a reflective support and a semipermeable filter disposed over and under translucent photodiodes, thus allows light of a second wavelength band, having the photoluminescence properties of getting lost or passing through, to be reflected again and thus maximally utilized, and thereby allows sensitivity and accuracy to be improved.
    Type: Application
    Filed: August 23, 2019
    Publication date: September 9, 2021
    Applicant: LG Display Co., Ltd.
    Inventors: Jin-Woo PARK, Changjin LIM, Soyeon LEE, Su Seok CHOI, Kiseok CHANG, Jeong Min MOON, Soon Shin JUNG, Sungpil RYU, Jihwan JUNG
  • Publication number: 20210124551
    Abstract: The present invention relates to an optical element capable of simultaneously outputting sound from the surface of a display device with an image, the optical element comprising: a first electrode member; a first dielectric elastomer layer disposed on the first electrode member; a second electrode member disposed on the first dielectric elastomer layer; and an optical crystal layer disposed on the second electrode member. Accordingly, in the present invention, image and sound are implemented simultaneously, and thus, it is possible to prevent defects due to mismatching of the image and the sound, and a separate sound system is not required when the display device is manufactured using the optical element, thereby making it possible to reduce components of an electronic product including the display device and reduce the manufacturing cost.
    Type: Application
    Filed: May 14, 2019
    Publication date: April 29, 2021
    Inventors: Jeong Yun SUN, Jeong Min MOON, Su Seok CHOI, Sungpil RYU, Jihwan JUNG, Kiseok CHANG, Do Yoon KIM, Hyesung CHO
  • Publication number: 20200365743
    Abstract: The present disclosure provides a phototransistor and a manufacturing method therefor, the phototransistor having a defective oxide ray absorption layer introduced to an oxide semiconductor phototransistor through a solution process or a defective oxide ray absorption part introduced to an interface between a gate insulation film and an oxide semiconductor layer through interface control, which forms damage, thereby improving light absorption in the range of a visible light region.
    Type: Application
    Filed: June 14, 2018
    Publication date: November 19, 2020
    Applicants: LG Display Co., Ltd., UIF (UNIVERSITY INDUSTRY FOUNDATION), YONSEI UNIVERSITY
    Inventors: Hyun Jae KIM, Young Jun TAK, Jusung CHUNG, Jeong Min MOON, Su Seok CHOI, Sungpil RYU, Jihwan JUNG, Kiseok CHANG
  • Publication number: 20200335571
    Abstract: An organic light emitting diode (OLED) display device includes a thin film transistor substrate including a first substrate, a thin film transistor disposed on the first substrate and a white organic light emitting diode (WOLED) electrically connected to the thin film transistor; a color filter substrate comprising a second substrate that faces the first substrate, and red, green and blue color filters disposed on the second substrate; a quantum dot pattern disposed on the WOLED of the thin film transistor substrate; and a refractive film disposed between the color filter substrate and the thin film transistor substrate provided with the quantum dot pattern.
    Type: Application
    Filed: September 12, 2018
    Publication date: October 22, 2020
    Applicants: LG Display Co., Ltd., UIF (UNIVERSITY INDUSTRY FOUNDATION), YONSEI UNIVERSITY
    Inventors: Young-Joo KIM, Hyo-Jun KIM, Jeong Min MOON, Su Seok CHOI, Sungpil RYU, Jihwan JUNG, Kiseok CHANG
  • Publication number: 20200274217
    Abstract: The present invention relates to a phase shifter comprising a DGS and a radio communication module comprising the same. The phase shifter comprises: a first substrate; a microstrip formed on the first substrate so as to extend in a first direction; a ground layer disposed with a space on the upper surface of the microstrip and having a defected ground structure (DGS) with a defected pattern formed therein; a second substrate disposed on the ground layer; and a liquid crystal layer disposed in a space between the first substrate and the second substrate, wherein DC voltage is applied between the ground layer and the microstrip.
    Type: Application
    Filed: October 23, 2018
    Publication date: August 27, 2020
    Applicants: LG Display Co., Ltd., UIF (UNIVERSITY INDUSTRY FOUNDATION), YONSEI UNIVERSITY
    Inventors: Byungwook MIN, Hoon Bae KIM, Sung-Eun KIM, Jeong Min MOON, Su Seok CHOI, Sungpil RYU, Jihwan JUNG, Kiseok CHANG
  • Patent number: 10281795
    Abstract: A liquid crystal lens film structure can includes a first substrate; a second substrate opposite to the first substrate; an adhesive layer on the second substrate; and a liquid crystal lens film between the first substrate and the adhesive layer. The liquid crystal lens film includes a resin layer configured to include a plurality of concave portions and a plurality of liquid crystal portions configured to each include liquid crystal molecules filled in the respective concave portion. The adhesive layer comes in contact with the liquid crystal lens film.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: May 7, 2019
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Seong-il Kim, Su Seok Choi, Jong Hoon Woo, Joong Ha Lee, Sang Hoon Oh
  • Publication number: 20160187760
    Abstract: A liquid crystal lens film structure can includes a first substrate; a second substrate opposite to the first substrate; an adhesive layer on the second substrate; and a liquid crystal lens film between the first substrate and the adhesive layer. The liquid crystal lens film includes a resin layer configured to include a plurality of concave portions and a plurality of liquid crystal portions configured to each include liquid crystal molecules filled in the respective concave portion. The adhesive layer comes in contact with the liquid crystal lens film.
    Type: Application
    Filed: December 28, 2015
    Publication date: June 30, 2016
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Seong-il Kim, Su Seok Choi, Jong Hoon Woo, Joong Ha Lee, Sang Hoon Oh
  • Patent number: 9097943
    Abstract: A liquid crystal display device includes first and second substrate facing each other, a pixel electrode and a common electrode on an inner surface of the first substrate and generating an electric field substantially parallel to the first substrate, a first alignment layer on the inner surface of the first substrate and homeotropically aligned, a first polarizer on an outer surface of the first substrate and having a first polarization axis, a second alignment layer on an inner surface of the second substrate and homogeneously aligned, a second polarizer on an outer surface of the second substrate and having a second polarization axis perpendicular to the first polarization axis, and a liquid crystal layer between the first and second alignment layers.
    Type: Grant
    Filed: August 11, 2011
    Date of Patent: August 4, 2015
    Assignee: LG Display Co., Ltd.
    Inventors: Wook-Sung Kim, Su-Seok Choi
  • Patent number: 8629967
    Abstract: A LCD and a fabrication process is presented. An upper substrate is coincidently formed with a red, a green and a blue color filters using phase separation. A compound containing a photopolymeric color filter resin and a liquid crystal are coated on an array substrate and then photopolymerized after formation of the array substrate. A seed layer may be provided on the substrate before the compound is applied. Polymerization of the color filter resin permits simultaneous formation of the upper, color filter substrate and liquid crystal layer.
    Type: Grant
    Filed: December 27, 2005
    Date of Patent: January 14, 2014
    Assignee: LG Display Co., Ltd.
    Inventors: Su Seok Choi, Sang Ho Choi
  • Patent number: 8319920
    Abstract: A transflective liquid crystal display device includes: first and second substrates facing and spaced apart from each other; a gate line on an inner surface of the first substrate; a data line crossing the gate line to define a pixel region including a reflective portion and a transmissive portion, wherein the transmissive portion has a polygonal shape inscribed in a rectangle, and a circumference of the transmissive portion is less than the circumference of the rectangle; a thin film transistor connected to the gate line and the data line; a passivation layer on the thin film transistor, the passivation layer having a opening corresponding to the transmissive portion; a reflective layer corresponding to the reflective portion on the passivation layer; a transparent electrode corresponding to the pixel region over the reflective layer; a color filter layer on an inner surface of the second substrate; a common electrode on the color filter layer; and a liquid crystal layer between the common electrode and the
    Type: Grant
    Filed: May 17, 2010
    Date of Patent: November 27, 2012
    Assignee: LG Display Co., Ltd.
    Inventors: Kyoung-Su Ha, Mi-Sook Nam, Su-Seok Choi, Sang-Min Jang
  • Publication number: 20120287100
    Abstract: Disclosed is a liquid crystal display device increasing transmittance to improve brightness while employing ferroelectric liquid crystals in a half-V mode. The liquid crystal display device includes a liquid crystal panel including ferroelectric liquid crystals of a half-V mode, and a driving circuit driving a liquid crystal panel so that a first frame period, which the positive data voltages are supplied to the liquid crystal panel, becomes longer than a second frame period, which the negative data voltages are supplied to the liquid crystal panel.
    Type: Application
    Filed: May 9, 2012
    Publication date: November 15, 2012
    Inventors: Jong-Hoon WOO, Su-Seok CHOI, Dong-Guk KIM, Jae-Hyung LIM, Joong-Ha LEE
  • Patent number: 8139009
    Abstract: A transflective liquid crystal display panel includes a ferroelectric liquid crystal cell operating in a half V-switching mode. The ferroelectric liquid crystal cell includes a reflective portion and a transmissive portion. A cell gap of the reflective portion is similar to a cell gap of the transmissive portion. A voltage applied to the ferroelectric liquid crystal cell depends on a brightness level of ambient light.
    Type: Grant
    Filed: June 29, 2004
    Date of Patent: March 20, 2012
    Assignee: LG Display Co., Ltd.
    Inventor: Su Seok Choi
  • Publication number: 20120038860
    Abstract: A liquid crystal display device includes first and second substrate facing each other, a pixel electrode and a common electrode on an inner surface of the first substrate and generating an electric field substantially parallel to the first substrate, a first alignment layer on the inner surface of the first substrate and homeotropically aligned, a first polarizer on an outer surface of the first substrate and having a first polarization axis, a second alignment layer on an inner surface of the second substrate and homogeneously aligned, a second polarizer on an outer surface of the second substrate and having a second polarization axis perpendicular to the first polarization axis, and a liquid crystal layer between the first and second alignment layers.
    Type: Application
    Filed: August 11, 2011
    Publication date: February 16, 2012
    Inventors: Wook-Sung KIM, Su-Seok Choi