Patents by Inventor Nam-Sung Cho

Nam-Sung 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).

  • Publication number: 20240057436
    Abstract: Disclosed is a display device. An embodiment of the inventive concept provides a display device that includes a substrate including a first sub pixel region, a second sub pixel region, and a third sub pixel region, reflective bottom electrodes provided on the substrate, a blue light emitting layer provided on the lower reflective electrodes, an encapsulation layer provided on the blue light emitting layer, a green color conversion layer provided on the encapsulation layer in the first sub pixel region, a color conversion layer provided on the encapsulation layer in the second sub pixel region, a blue reflective layer provided on both the green color conversion layer and the color conversion layer, and a blue transmissive layer disposed adjacent to the color conversion layer and provided on the encapsulation layer in the third sub pixel region.
    Type: Application
    Filed: May 10, 2023
    Publication date: February 15, 2024
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Chan-mo KANG, Byoung-Hwa KWON, Gi Heon KIM, Jin-Wook SHIN, Nam Sung CHO, Hyunsu CHO, Sukyung CHOI
  • Patent number: 11810522
    Abstract: A pixel circuit driving method of controlling an operation of a light-emitting element provided in a pixel of a display panel may comprise: applying pulse amplitude modulation (PAM) signals having a plurality of levels to a first terminal of a first transistor having a second terminal connected to a control terminal of a second transistor configured to drive the light-emitting element with a current according to a gray scale required for the light-emitting element; and applying a PAM signal of any one level selected from the PAM signals to the control terminal of the second transistor during each sub-frame time corresponding to a turn-on time of the first transistor controlled by a pulse width modulation (PWM) signal having a plurality of sub-frames in a single frame according to the gray scale.
    Type: Grant
    Filed: September 8, 2022
    Date of Patent: November 7, 2023
    Assignees: Electronics and Telecommunications Research Institute, IUCF-HYU (Industry-University Cooperation Foundation Hanyang University)
    Inventors: Chun Won Byun, Chan Mo Kang, Nam Sung Cho, Byong Deok Choi, Yong Duck Kim
  • Publication number: 20230290306
    Abstract: A pixel circuit may comprise: a first transistor having a first terminal connected to a data line and to which a data signal is applied and a gate terminal connected to a scan line and to which a scan signal is applied; a third transistor having a gate terminal connected to a second terminal of the first transistor and a second terminal connected to a light emitting device; a capacitor having a second terminal commonly connected to the second terminal of the first transistor and the gate terminal of the third transistor; and a second transistor having a second terminal commonly connected to a first terminal of the capacitor and a first terminal of the third transistor, a first terminal connected to a first power supply voltage, and a gate terminal connected to an emission line to which an emission signal is applied.
    Type: Application
    Filed: March 9, 2023
    Publication date: September 14, 2023
    Applicants: Electronics and Telecommunications Research Institute, IUCF-HYU (Industry-University Cooperation Foundation Hanyang University)
    Inventors: Chun Won BYUN, Chan Mo KANG, Nam Sung CHO, Byong Deok CHOI, Yong Duck KIM
  • Publication number: 20230230550
    Abstract: A pixel circuit driving method of controlling an operation of a light-emitting element provided in a pixel of a display panel may comprise: applying pulse amplitude modulation (PAM) signals having a plurality of levels to a first terminal of a first transistor having a second terminal connected to a control terminal of a second transistor configured to drive the light-emitting element with a current according to a gray scale required for the light-emitting element; and applying a PAM signal of any one level selected from the PAM signals to the control terminal of the second transistor during each sub-frame time corresponding to a turn-on time of the first transistor controlled by a pulse width modulation (PWM) signal having a plurality of sub-frames in a single frame according to the gray scale.
    Type: Application
    Filed: September 8, 2022
    Publication date: July 20, 2023
    Applicants: Electronics and Telecommunications Research Institute, IUCF-HYU (Industry-University Cooperation Foundation Hanyang University)
    Inventors: Chun Won BYUN, Chan Mo KANG, Nam Sung CHO, Byong Deok CHOI, Yong Duck KIM
  • Patent number: 11476433
    Abstract: Provided is a light emitting device including a lower electrode, an upper electrode disposed to face the lower electrode, a quantum dot light emitting layer between the lower electrode and the upper electrode, an electron transport layer between the lower electrode and the quantum dot light emitting layer, and a hole transport layer between the upper electrode and the quantum dot light emitting layer, wherein the quantum dot light emitting layer includes a quantum dot, and a first ligand on a surface of the quantum dot, and a second ligand on the surface of the quantum dot.
    Type: Grant
    Filed: April 3, 2020
    Date of Patent: October 18, 2022
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Sukyung Choi, Hyunkoo Lee, Byoung-Hwa Kwon, Jaehyun Moon, Hyunsu Cho, Chan-mo Kang, Chunwon Byun, Jin Wook Shin, Nam Sung Cho
  • Publication number: 20220137436
    Abstract: Provided is a nano structure for controlling optical properties of an optical device. The nano structure includes a substrate, a surface modification layer provided on the substrate to modify surface energy of the substrate, and a capping layer provided on the surface modification layer. The capping layer includes a convex portion having a convex profile away from the surface modification layer and a concave portion that is in contact with the surface modification layer.
    Type: Application
    Filed: October 1, 2021
    Publication date: May 5, 2022
    Inventors: Doo-Hee CHO, Byoung-Hwa KWON, YOUNG SAM PARK, Jin Wook SHIN, Nam Sung CHO, Hyunsu CHO
  • Patent number: 11278227
    Abstract: Provided is a biometric information measurement method. The method includes providing a bio-material including at least one of cells and tissues, contacting a first electrode and a second electrode with the bio-material and applying a first electrical signal and a second electrical signal to the bio-material, sensing a third electrical signal from the bio-material, and analyzing an oxygen concentration in the bio-material from the third electrical signal.
    Type: Grant
    Filed: September 10, 2019
    Date of Patent: March 22, 2022
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Young Sam Park, Jaehyun Moon, Seongdeok Ahn, Byoung Gon Yu, Jeong Ik Lee, Nam Sung Cho, Doo-Hee Cho
  • Publication number: 20210066631
    Abstract: Provided is a light emitting device including a lower electrode, an upper electrode disposed to face the lower electrode, a quantum dot light emitting layer between the lower electrode and the upper electrode, an electron transport layer between the lower electrode and the quantum dot light emitting layer, and a hole transport layer between the upper electrode and the quantum dot light emitting layer, wherein the quantum dot light emitting layer includes a quantum dot, and a first ligand on a surface of the quantum dot, and a second ligand on the surface of the quantum dot.
    Type: Application
    Filed: April 3, 2020
    Publication date: March 4, 2021
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Sukyung CHOI, Hyunkoo LEE, Byoung-Hwa KWON, Jaehyun MOON, Hyunsu CHO, Chan-mo KANG, CHUNWON BYUN, Jin Wook SHIN, Nam Sung CHO
  • Patent number: 10878214
    Abstract: Provided is a complex biometric sensor. The complex biometric sensor includes a substrate including a light emitting region, a first light receiving region, and a second light receiving region, a light emitting part disposed adjacent to the substrate in the light emitting region, a color conversion layer disposed on the substrate in the light emitting region and vertically overlapping the light emitting part; a first light receiving layer disposed on the substrate in the first light receiving region, and a second light receiving layer disposed on the substrate in the second light receiving region. The light emitting part generates light of a first wavelength. The color conversion layer receives light of the first wavelength and emits the light of the first wavelength and light of the second wavelength. The first light receiving layer detects the light of the first wavelength. The second light receiving layer detects the light of the second wavelength.
    Type: Grant
    Filed: April 8, 2019
    Date of Patent: December 29, 2020
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Chul Woong Joo, Seung Youl Kang, Jaehyun Moon, Seongdeok Ahn, Jae-Eun Pi, Young Sam Park, Byoung-Hwa Kwon, Sung Haeng Cho, Jeong Ik Lee, Nam Sung Cho, Su Jae Lee
  • Publication number: 20200352460
    Abstract: A pixel circuit includes a sensing block, a stimulation block, a first line control circuit, and a second line control circuit. The sensing block outputs biometric data of a biosignal in response to a first selection signal. The stimulation block radiates a stimulation signal in response to a second selection signal. The first line control circuit outputs the first selection signal for selecting the sensing block as a target sensing block, and outputs the second selection signal for selecting the stimulation block as a target stimulation block. The second line control circuit processes characteristic data associated with the biometric data and the stimulation signal.
    Type: Application
    Filed: April 20, 2020
    Publication date: November 12, 2020
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: CHUNWON BYUN, O Eun KWON, Chan Woo PARK, Hyunkoo LEE, Sukyung CHOI, Chan-mo KANG, Byoung-Hwa KWON, Chil Seong AH, Hyunsu CHO, JEONG IK LEE, Nam Sung CHO
  • Patent number: 10789448
    Abstract: The inventive concept provides an organic electronic device and a method of fabricating the same. The organic electronic device includes a flexible substrate configured to include a first region and a second region which are laterally spaced apart from each other, an organic light-emitting diode disposed in the first region of the flexible substrate, and a photodetector disposed in the second region of the flexible substrate, wherein the organic light-emitting diode and the photodetector are disposed on the same plane.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: September 29, 2020
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Young Sam Park, Jaehyun Moon, Seongdeok Ahn, Seung Youl Kang, Sung Haeng Cho, Byoung Gon Yu, Jeong Ik Lee, Jonghee Lee, Nam Sung Cho, Doo-Hee Cho, Hyunsu Cho
  • Publication number: 20200107739
    Abstract: Provided is a biometric information measurement method. The method includes providing a bio-material including at least one of cells and tissues, contacting a first electrode and a second electrode with the bio-material and applying a first electrical signal and a second electrical signal to the bio-material, sensing a third electrical signal from the bio-material, and analyzing an oxygen concentration in the bio-material from the third electrical signal.
    Type: Application
    Filed: September 10, 2019
    Publication date: April 9, 2020
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: YOUNG SAM PARK, Jaehyun MOON, Seongdeok AHN, Byoung Gon YU, JEONG IK LEE, Nam Sung CHO, Doo-Hee CHO
  • Patent number: 10509145
    Abstract: Provided are an optical device and a manufacturing method thereof. The method of manufacturing an optical device may include providing a substrate structure, and depositing an array including curved structures on the substrate structure. The curved structures may include a crystalline organic compound.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: December 17, 2019
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Young Sam Park, Doo-Hee Cho, Jeong Ik Lee, Jonghee Lee, Seongdeok Ahn, Byoung Gon Yu, Nam Sung Cho
  • Patent number: 10490763
    Abstract: Provided is a display device and a manufacturing method thereof. More specifically, the present invention relates to a display device including a nickel oxide thin film co-doped with a copper monovalent cation and a copper divalent cation, and a manufacturing method thereof. The present invention provides a display device including a substrate, a first electrode layer disposed on the substrate, a first common layer disposed on the substrate, a light emitting layer disposed on the first common layer, a second common layer disposed on the light emitting layer, and a second electrode layer disposed on the second common layer, wherein the first common layer includes a nickel oxide thin film co-doped with a first metal cation and a second metal cation, and the oxidation number of the first metal cation and the oxidation number the second metal cation are different from each other.
    Type: Grant
    Filed: August 2, 2018
    Date of Patent: November 26, 2019
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Byoung-Hwa Kwon, Chul Woong Joo, Jonghee Lee, Hyunkoo Lee, Hyunsu Cho, Nam Sung Cho
  • Publication number: 20190311177
    Abstract: Provided is a complex biometric sensor. The complex biometric sensor includes a substrate including a light emitting region, a first light receiving region, and a second light receiving region, a light emitting part disposed adjacent to the substrate in the light emitting region, a color conversion layer disposed on the substrate in the light emitting region and vertically overlapping the light emitting part; a first light receiving layer disposed on the substrate in the first light receiving region, and a second light receiving layer disposed on the substrate in the second light receiving region. The light emitting part generates light of a first wavelength. The color conversion layer receives light of the first wavelength and emits the light of the first wavelength and light of the second wavelength. The first light receiving layer detects the light of the first wavelength. The second light receiving layer detects the light of the second wavelength.
    Type: Application
    Filed: April 8, 2019
    Publication date: October 10, 2019
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Chul Woong JOO, Seung Youl KANG, Jaehyun MOON, Seongdeok AHN, Jae-Eun PI, Young Sam PARK, Byoung-Hwa KWON, Sung Haeng CHO, JEONG IK LEE, Nam Sung CHO, Su Jae LEE
  • Patent number: 10374093
    Abstract: Embodiments of the inventive concepts provide a method of fabricating a flexible substrate and the flexible substrate fabricated thereby. The method includes printing a gate catalyst pattern on a separation layer, forming a gate plating pattern on the gate catalyst pattern, forming a gate insulating layer on the gate plating pattern, printing a source catalyst pattern and a drain catalyst pattern spaced apart from each other on the gate insulating layer, and forming a source plating pattern and a drain plating pattern on the source catalyst pattern and the drain catalyst pattern, respectively.
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: August 6, 2019
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Doo-Hee Cho, Young Sam Park, Chunwon Byun, Byoung Gon Yu, Jonghee Lee, Hyunkoo Lee, Nam Sung Cho
  • Publication number: 20190213380
    Abstract: Provided is an optical fingerprint recognition sensor. The optical fingerprint recognition sensor includes a transparent light emitting unit configured to emit light to a fingerprint, a light receiving unit disposed below the light emitting unit to vertically overlap the light emitting unit and configured to receive light reflected by the fingerprint, and a control unit disposed below the light emitting unit to vertically overlap the light emitting unit and configured to control the light emitting unit and the light receiving unit. The light emitting unit includes an organic layer.
    Type: Application
    Filed: December 13, 2018
    Publication date: July 11, 2019
    Inventors: Chul Woong JOO, Jonghee LEE, Jae-Eun PI, Byoung-Hwa KWON, Hyunsu CHO, Seung Youl KANG, Seongdeok AHN, Jeong Ik LEE, Nam Sung CHO, Sung Haeng CHO, Woojin SUNG, Jongchan LEE
  • Patent number: 10281792
    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: Grant
    Filed: January 8, 2018
    Date of Patent: May 7, 2019
    Assignee: 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
  • Publication number: 20190131559
    Abstract: Provided is a display device and a manufacturing method thereof. More specifically, the present invention relates to a display device including a nickel oxide thin film co-doped with a copper monovalent cation and a copper divalent cation, and a manufacturing method thereof. The present invention provides a display device including a substrate, a first electrode layer disposed on the substrate, a first common layer disposed on the substrate, a light emitting layer disposed on the first common layer, a second common layer disposed on the light emitting layer, and a second electrode layer disposed on the second common layer, wherein the first common layer includes a nickel oxide thin film co-doped with a first metal cation and a second metal cation, and the oxidation number of the first metal cation and the oxidation number the second metal cation are different from each other.
    Type: Application
    Filed: August 2, 2018
    Publication date: May 2, 2019
    Inventors: Byoung-Hwa KWON, Chul Woong JOO, Jonghee LEE, Hyunkoo LEE, Hyunsu CHO, Nam Sung CHO
  • Publication number: 20190065815
    Abstract: The inventive concept provides an organic electronic device and a method of fabricating the same. The organic electronic device includes a flexible substrate configured to include a first region and a second region which are laterally spaced apart from each other, an organic light-emitting diode disposed in the first region of the flexible substrate, and a photodetector disposed in the second region of the flexible substrate, wherein the organic light-emitting diode and the photodetector are disposed on the same plane.
    Type: Application
    Filed: July 13, 2018
    Publication date: February 28, 2019
    Inventors: Young Sam PARK, Jaehyun MOON, Seongdeok AHN, Seung Youl KANG, Sung Haeng CHO, Byoung Gon YU, Jeong Ik LEE, Jonghee LEE, Nam Sung CHO, Doo-Hee CHO, Hyunsu CHO