Patents by Inventor Hyeon Gu Cho

Hyeon Gu Cho 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: 11587980
    Abstract: A display device includes a display substrate, a light emitting element layer disposed on a surface of the display substrate and including display pixels, a sensing substrate having a surface attached to another surface of the display substrate, a sensing element layer disposed on another surface of the sensing substrate and including sending pixels that each sense light of a color, and a photorefractive layer disposed on the sensing element layer and including micro lenses.
    Type: Grant
    Filed: March 25, 2020
    Date of Patent: February 21, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hyeon Gu Cho, Min Soo Choi, Seok Gyu Yoon, Jae Jin Lyu
  • Publication number: 20210119168
    Abstract: An organic electroluminescence device of an embodiment includes a first electrode, a second electrode, and an emission layer disposed between the first electrode and the second electrode, wherein the emission layer includes a host having a first luminescent onset wavelength, a first dopant having a second luminescent onset wavelength, and a second dopant different from the first dopant and having a third luminescent onset wavelength. The third luminescent onset wavelength is greater than each of the first luminescent onset wavelength and the second luminescent onset wavelength, and the device has improved emission efficiency and/or long-lifespan characteristics.
    Type: Application
    Filed: December 22, 2020
    Publication date: April 22, 2021
    Inventors: MINSOO CHOI, MINJE KIM, EUNG DO KIM, HYUNYOUNG KIM, HYOJEONG KIM, HYOSUP SHIN, SEOKGYU YOON, YOUNGKI LEE, JUNGSUB LEE, JIYOUNG LEE, HYEJIN JUNG, KUNWOOK CHO, HYEON GU CHO, YOUNGEUN CHOI, JAEJIN LYU
  • Publication number: 20210098716
    Abstract: An organic electroluminescence device according to an embodiment of the present disclosure includes a first electrode, a second electrode, and an emission layer. The emission layer includes host compounds and dopant compounds. The hot compounds include a first host compound represented by Formula 1, and a second host compound represented by Formula 2, and the dopant compounds include an assistant dopant compound represented by Formula 3, and a light-emitting dopant compound represented by Formula 4: Accordingly, the organic electroluminescence device according to an embodiment may achieve high efficiency and long life.
    Type: Application
    Filed: September 28, 2020
    Publication date: April 1, 2021
    Inventors: JUNGSUB LEE, HYUNYOUNG KIM, JIYOUNG LEE, HYEJIN JUNG, MINJE KIM, EUNG DO KIM, HYOJEONG KIM, HYOSUP SHIN, SEOKGYU YOON, YOUNGKI LEE, KUNWOOK CHO, HYEON GU CHO, MINSOO CHOI, YOUNGEUN CHOI, HYEIN JEONG, JAEJIN LYU
  • Publication number: 20210098721
    Abstract: An organic electroluminescence device of an embodiment includes a first electrode, a second electrode on the first electrode, and an emission layer between the first electrode and the second electrode, wherein the emission layer includes a first host and a second host which are different from each other, a first dopant including an organic metal complex containing Ir, Ru, Rh, Pt, Pd, Cu, or Os as a central metal atom, and a second dopant represented by Formula D-2 below, and thereby the organic electroluminescence device may exhibit high luminous efficiency and long service life characteristics.
    Type: Application
    Filed: August 19, 2020
    Publication date: April 1, 2021
    Inventors: Hyejin JUNG, Minje KIM, Eung Do KIM, Hyunyoung KIM, Hyojeong KIM, Hyosup SHIN, Seokgyu YOON, Youngki LEE, Jungsub LEE, Jiyoung LEE, Kunwook CHO, Hyeon Gu CHO, Minsoo CHOI, Youngeun CHOI, Hyein JEONG
  • Publication number: 20210098714
    Abstract: An organic electroluminescence device of an embodiment includes a first electrode, a second electrode, and an emission layer disposed between the first electrode and the second electrode, wherein the emission layer includes a host having a first luminescent onset wavelength, a first dopant having a second luminescent onset wavelength, and a second dopant different from the first dopant and having a third luminescent onset wavelength. The third luminescent onset wavelength is greater than each of the first luminescent onset wavelength and the second luminescent onset wavelength, and the device has improved emission efficiency and/or long-lifespan characteristics.
    Type: Application
    Filed: June 19, 2020
    Publication date: April 1, 2021
    Inventors: MINSOO CHOI, MINJE KIM, EUNG DO KIM, HYUNYOUNG KIM, HYOJEONG KIM, HYOSUP SHIN, SEOKGYU YOON, YOUNGKI LEE, JUNGSUB LEE, JIYOUNG LEE, HYEJIN JUNG, KUNWOOK CHO, HYEON GU CHO, YOUNGEUN CHOI, JAEJIN LYU
  • Publication number: 20210036060
    Abstract: A display device includes a display substrate, a light emitting element layer disposed on a surface of the display substrate and including display pixels, a sensing substrate having a surface attached to another surface of the display substrate, a sensing element layer disposed on another surface of the sensing substrate and including sending pixels that each sense light of a color, and a photorefractive layer disposed on the sensing element layer and including micro lenses.
    Type: Application
    Filed: March 25, 2020
    Publication date: February 4, 2021
    Applicant: Samsung Display Co., LTD.
    Inventors: Hyeon Gu CHO, Min Soo CHOI, Seok Gyu YOON, Jae Jin LYU
  • Patent number: 9823513
    Abstract: A manufacturing method of a liquid crystal display includes: forming a first alignment layer on a passivation layer and a pixel electrode to form a first display panel; forming a second alignment layer on a common electrode to form a second display panel; and combining the first and the second display panels, wherein formation of the first and second alignment layers includes spraying a first alignment mixture and second alignment mixture on, respectively, the first and second display panels using an inkjet head while moving the inkjet head across the first and second display panels to form a first alignment mixture layer and a second alignment mixture layer, and hardening the first and second alignment mixture layers, and spray progressing directions of the first and second alignment mixture are more than 7 degrees to less than 45 degrees with respect to the first substrate and the second substrate respectively.
    Type: Grant
    Filed: August 12, 2014
    Date of Patent: November 21, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventor: Hyeon Gu Cho
  • Patent number: 9778455
    Abstract: A transflective display apparatus includes a first electrode and a second electrode, which face each other and are separated from one another by a pixel electrode. In addition, a preparation voltage is applied to the first electrode or the second electrode before applying a driving voltage to the pixel electrode.
    Type: Grant
    Filed: March 23, 2015
    Date of Patent: October 3, 2017
    Assignee: Amazon Technologies, Inc.
    Inventors: Seung-Jin Baek, Sang-II Kim, Yeuntae Kim, Hyeon Gu Cho
  • Patent number: 9632306
    Abstract: The present inventive concept relates to an electrowetting display device including a lyophobic colloid material and a polymer resin such as an organic layer or a polyimide (PI), and a lyophobic layer including a supporting layer supporting the lyophobic colloid material and using a photoreactive fluorine-based surfactant for a fluorine-based material to be positioned above and for a hardened photoreactive material layer to be positioned below through exposure in a single step without separately performing a hydrophilic treatment and then a water-repellent treatment, thereby reducing the number of processes, the manufacturing time, and the cost.
    Type: Grant
    Filed: March 16, 2015
    Date of Patent: April 25, 2017
    Assignee: Amazon Technologies, Inc.
    Inventors: Bo Ram Lee, Dae Jin Park, Joo-Han Bae, Seung-Jin Baek, Da Hye Yoon, Hyeon Gu Cho, Taimei Kodaira
  • Patent number: 9568780
    Abstract: A liquid crystal display includes: first and second display panels facing each other; and a liquid crystal layer between the first display panel and the second display panel and including an alignment assisting agent. The first display panel includes: a first substrate; a first gate line and a second gate line on the first substrate and spaced apart from each other; a data line crossing the first gate line and the second gate line; a shielding electrode on the data line and insulated from the data line; a first electrode electrically connected with the first gate line and the data line; a passivation layer on the first electrode; and a second electrode on the passivation layer and electrically connected with the second gate line and the shielding electrode. The second display panel includes a third electrode on a second substrate. The second electrode includes a branch portion.
    Type: Grant
    Filed: November 24, 2014
    Date of Patent: February 14, 2017
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Gak Seok Lee, Hyeon Gu Cho
  • Patent number: 9279976
    Abstract: An electrowetting display apparatus includes a first base substrate, a second base substrate which faces the first base substrate, a first electrode on the first base substrate, and a second electrode on the second base substrate, where the second electrode faces the first electrode. A barrier wall is on the first electrode, where the barrier wall defines a storage area. A surface of the first electrode and the barrier wall is overlapped by a barrier layer. In addition, a water-repellent layer is on the barrier layer which is in the storage area. First and second fluids are in the storage area, the first fluid is separate from the second fluid, and the first fluid or the second fluid has a polarity.
    Type: Grant
    Filed: October 6, 2014
    Date of Patent: March 8, 2016
    Assignee: Amazon Technologies, Inc.
    Inventors: Dong-Hwan Kim, Sang-Il Kim, Tae-Woon Cha, Myung-Hwan Kim, Woo Yong Sung, Jeongho Lee, Hyoung-Wook Lee, Hyeon Gu Cho
  • Patent number: 9213180
    Abstract: An electrowetting display device includes a first base substrate, a plurality of first electrodes disposed on the first base substrate and positioned to respectively correspond to positions of a plurality of pixels, a partition wall disposed on the first base substrate to partition the pixels, a second electrode disposed on the partition wall and including a plurality of openings, a second base substrate facing the first base substrate, and an electrowetting layer disposed between the first base substrate and the second base substrate, the electrowetting layer respectively being moved by voltages respectively applied to the first electrode and the second electrode.
    Type: Grant
    Filed: June 9, 2014
    Date of Patent: December 15, 2015
    Assignee: Amazon Technologies, Inc.
    Inventors: Byungseok Choi, Seung-Jin Baek, Taimei Kodaira, JiEun Lee, Hyeon Gu Cho
  • Publication number: 20150301421
    Abstract: A liquid crystal display includes: first and second display panels facing each other; and a liquid crystal layer between the first display panel and the second display panel and including an alignment assisting agent. The first display panel includes: a first substrate; a first gate line and a second gate line on the first substrate and spaced apart from each other; a data line crossing the first gate line and the second gate line; a shielding electrode on the data line and insulated from the data line; a first electrode electrically connected with the first gate line and the data line; a passivation layer on the first electrode; and a second electrode on the passivation layer and electrically connected with the second gate line and the shielding electrode. The second display panel includes a third electrode on a second substrate. The second electrode includes a branch portion.
    Type: Application
    Filed: November 24, 2014
    Publication date: October 22, 2015
    Inventors: Gak Seok LEE, Hyeon Gu CHO
  • Publication number: 20150253565
    Abstract: The present inventive concept relates to an electrowetting display device including a lyophobic colloid material and a polymer resin such as an organic layer or a polyimide (PI), and a lyophobic layer including a supporting layer supporting the lyophobic colloid material and using a photoreactive fluorine-based surfactant for a fluorine-based material to be positioned above and for a hardened photoreactive material layer to be positioned below through exposure in a single step without separately performing a hydrophilic treatment and then a water-repellent treatment, thereby reducing the number of processes, the manufacturing time, and the cost.
    Type: Application
    Filed: March 16, 2015
    Publication date: September 10, 2015
    Inventors: Bo Ram Lee, Dae Jin Park, Joo-Han Bae, Seung-Jin Baek, Da Hye Yoon, Hyeon Gu Cho, Taimei Kodaira
  • Patent number: 9122050
    Abstract: An electrowetting device includes: a lower substrate and an upper substrate which face each other; a first electrode on the lower substrate; an insulating layer on the first electrode; a second electrode on the upper substrate; and a first fluid and a second fluid between the upper substrate and the lower substrate. The first fluid includes a solvent, a dye and a scattering enhancer.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: September 1, 2015
    Assignee: Amazon Technologies, Inc.
    Inventors: Hyeon Gu Cho, Yung Kyung Park, Jae Jin Lyu
  • Patent number: 9104022
    Abstract: An electrowetting display device includes a first substrate, a second substrate, a conductive fluid and a non-conductive fluid. The first substrate includes a first base substrate, a first electrode layer, a hydrophobic insulation layer and a partition wall. The first electrode layer is formed on the first base substrate and includes pixel electrodes spaced apart from each other and a common notch electrode formed between the pixel electrodes. The hydrophobic insulation layer is formed on the first electrode layer. The partition wall is formed surrounding the pixel electrodes and the common notch electrode on the hydrophobic insulation layer. The second substrate is opposite to the first substrate. The conductive fluid and the non-conductive fluid are interposed between the first and second substrates. The conductive fluid and the non-conductive fluid are controlled to vary transmittance of light in accordance with an electric signal applied to the pixel electrodes.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: August 11, 2015
    Assignee: Amazon Technologies, Inc.
    Inventors: Hyeon-Gu Cho, Sang-Il Kim, Seung-Jin Baek, Jin-Woo Choi
  • Publication number: 20150192771
    Abstract: A transflective display apparatus includes a first electrode and a second electrode, which face each other and are separated from one another by a pixel electrode. In addition, a preparation voltage is applied to the first electrode or the second electrode before applying a driving voltage to the pixel electrode.
    Type: Application
    Filed: March 23, 2015
    Publication date: July 9, 2015
    Inventors: Seung-Jin Baek, Sang-Il Kim, Yeuntae Kim, Hyeon Gu Cho
  • Publication number: 20150116643
    Abstract: A display device includes two facing substrates, a liquid crystal layer provided between the two substrates, and alignment layers provided between the liquid crystal layer and each of the substrates. The alignment layer includes a main layer, and an alignment forming layer provided on the main layer and including a plurality of domains phase separated from the main layer.
    Type: Application
    Filed: April 11, 2014
    Publication date: April 30, 2015
    Applicant: Samsung Display Co., Ltd.
    Inventors: Duckjong SUH, Hyunku Ahn, Gak Seok Lee, Taekjoon Lee, Seungyeon Jeong, Hyeon Gu Cho, Jaejin Lyu
  • Publication number: 20150098050
    Abstract: A liquid crystal display includes: a first substrate and a second substrate facing each other; an alignment layer positioned on at least one of the first substrate and the second substrate; and a liquid crystal layer positioned between the first substrate and the second substrate, wherein the alignment layer includes a main chain and at least one side chain connected to the main chain, the at least one side chain includes at least one kind of vertical alignment side chain and at least two kinds of reaction monomer side chains, the reaction monomer side chains include a main reaction monomer and a sub-reaction monomer, and a length of the main reaction monomer is longer than the length of the sub-reaction monomer. The liquid crystal display provides an excellent pretilt characteristic and improved modulus of the formed polymer, thereby minimizing the afterimage.
    Type: Application
    Filed: June 20, 2014
    Publication date: April 9, 2015
    Inventors: Hyeon Gu CHO, Duck Jong SUH, Hyun Ku AHN, Jae Jin LYU
  • Patent number: 8988761
    Abstract: A transflective display apparatus includes a first electrode and a second electrode, which face each other and are separated from one another by a pixel electrode. In addition, a preparation voltage is applied to the first electrode or the second electrode before applying a driving voltage to the pixel electrode.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: March 24, 2015
    Assignee: Amazon Technologies, Inc.
    Inventors: Seung-Jin Baek, Sangil Kim, Yeun Tae Kim, Hyeon Gu Cho