Patents by Inventor Chang Heon Kang

Chang Heon Kang 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: 20240132357
    Abstract: An embodiment of the present specification provides a method for preparing a catalyst for preparing a carbon nanotube, comprising: (a) dissolving a main catalyst precursor, a support precursor, a cocatalyst precursor and a precipitation inhibitor in a solvent to prepare a precursor solution; and (b) pyrolyzing the precursor solution by spraying the precursor solution into a reactor, wherein a mole fraction of the precipitation inhibitor to the cocatalyst precursor is 0.1 to 1.5.
    Type: Application
    Filed: October 19, 2023
    Publication date: April 25, 2024
    Applicant: KOREA KUMHO PETROCHEMICAL CO., LTD.
    Inventors: Myung Hoon JEONG, Hyun Tae KIM, Sang Hyo RYU, Chung Heon JEONG, Wan Sung LEE, Woo Ram JUNG, Chang Gu KANG
  • Patent number: 11088238
    Abstract: A display device includes a plurality of electrode pads which are arranged in a non-display region having a side line of a substrate; a circuit film which includes a plurality of output pads contacting the plurality of electrode pads and extending in a direction, and on which a driving IC is mounted; a plurality of test lines that extend in the direction from the side line; and a plurality of connection lines which connect the plurality of test lines to corresponding electrode pads, wherein each test line is located in a separate region between two output pads adjacent to both sides of each test line.
    Type: Grant
    Filed: July 18, 2019
    Date of Patent: August 10, 2021
    Assignee: LG Display Co., Ltd.
    Inventors: Woo-Sung Shim, Hyun-Soo Lim, Dong-Geun Bae, Young-Kyun Kim, Jeong-Hwan Park, Chang-Heon Kang, Kyeong-Taek Min
  • Publication number: 20200212158
    Abstract: A display device includes a plurality of electrode pads which are arranged in a non-display region having a side line of a substrate; a circuit film which includes a plurality of output pads contacting the plurality of electrode pads and extending in a direction, and on which a driving IC is mounted; a plurality of test lines that extend in the direction from the side line; and a plurality of connection lines which connect the plurality of test lines to corresponding electrode pads, wherein each test line is located in a separate region between two output pads adjacent to both sides of each test line.
    Type: Application
    Filed: July 18, 2019
    Publication date: July 2, 2020
    Inventors: Woo-Sung SHIM, Hyun-Soo LIM, Dong-Geun BAE, Young-Kyun KIM, Jeong-Hwan PARK, Chang-Heon KANG, Kyeong-Taek MIN
  • Patent number: 9934723
    Abstract: An electronic display panel comprising a plastic substrate; a bottom shield metal (BSM) on the plastic substrate; a thin-film transistor (TFT) on the BSM, the TFT and the BSM at least partially overlapping each other; and an active buffer layer between the TFT and the BSM, wherein the BSM is connected to one of a gate electrode, a source electrode, and a drain electrode of the TFT. A bottom shield metal (BSM) on the plastic substrate, the BSM located to minimize formation of a back channel in a pixel circuit by trapped charges of the plastic substrate, the pixel circuit in a pixel area defined by a gate line and a data line on the plastic substrate, the pixel circuit on the active buffer layer including a plurality of TFTs and a plurality of component interconnecting nodes.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: April 3, 2018
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Jung-Min Lee, Juhn Suk Yoo, Ji No Lee, Jae Soo Park, Chang Heon Kang, Ho Young Ko, Soo Hong Kim, Sung Ki Hong
  • Patent number: 9691330
    Abstract: Provided is an OLED display device including a plurality of pixel each of which includes a light emitting element and a cell driver configured to drive the light emitting element. The cell driver includes: a driving switch element serially connected with the light emitting element between a high voltage supply line and a low voltage supply line; a first switch element configured to, in response to a second scan signal, connect a data line with a first node to which a gate electrode of the driving switch element is connected; a second switch element configured to, in response to a first scan signal, apply a third scan signal to a second node to which a source electrode of the driving switch element is connected; and a third switch element configured to, in response to an emission signal, connect the high voltage supply line with a drain electrode of the driving switch element.
    Type: Grant
    Filed: December 30, 2014
    Date of Patent: June 27, 2017
    Assignee: LG Display Co., Ltd.
    Inventors: Jung Min Lee, Chang Heon Kang
  • Patent number: 9572513
    Abstract: There is disclosed an apparatus for measuring biometric information having a hand rest, which can perform precise and comprehensive measurement by measuring biometric information about an examinee taking a more comfortable position. The apparatus for measuring the biometric information having the hand rest formed in a convex curvature shape to have an examinee's hand put thereon, to contact with an examinee's palm and fingers; and a measurement part provided in the hand rest to measure the examinee's biometric information.
    Type: Grant
    Filed: September 8, 2010
    Date of Patent: February 21, 2017
    Assignee: KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY
    Inventors: Sung Il Yi, Ki Young Kim, Kang Eun Kim, Chang Heon Kang
  • Patent number: 9293485
    Abstract: Discussed is a flexible display device to reduce a width of a bezel. The flexible display device includes a substrate being formed of a flexible material, a plurality of gate lines and a plurality of data lines crossing each other, a plurality of pads formed in a pad area of a non-display area, a plurality of links formed in a link area of the non-display area a plurality of insulation films formed over the entire surface of the substrate, and a first bending hole formed in a bending area of the non-display area, the first bending hole passing through at least one of the insulation films disposed under the link, wherein the bending area is bent such that the pads are disposed on the lower surface of the substrate.
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: March 22, 2016
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Sang-Cheon Youn, Hyoung-Suk Jin, Chang-Heon Kang, Se-Yeoul Kwon
  • Patent number: 9241648
    Abstract: There is disclosed an apparatus for measuring biometric information that can perform precise and comprehensive measurement by measuring biometric information about an examinee taking a more comfortable position. The apparatus for measuring biometric information includes a hand rest comprising a hand rest part formed in a concave curvature shape to have an examinee's hand put thereon, to contact with an examinee's palm and fingers; and a measurement part provided in the hand rest part to measure the examinee's biometric information.
    Type: Grant
    Filed: September 8, 2010
    Date of Patent: January 26, 2016
    Assignee: KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY
    Inventors: Sung Il Yi, Ki Young Kim, Kang Eun Kim, Chang Heon Kang
  • Publication number: 20150379923
    Abstract: An electronic display panel comprising a plastic substrate; a bottom shield metal (BSM) on the plastic substrate; a thin-film transistor (TFT) on the BSM, the TFT and the BSM at least partially overlapping each other; and an active buffer layer between the TFT and the BSM, wherein the BSM is connected to one of a gate electrode, a source electrode, and a drain electrode of the TFT. A bottom shield metal (BSM) on the plastic substrate, the BSM located to minimize formation of a back channel in a pixel circuit by trapped charges of the plastic substrate, the pixel circuit in a pixel area defined by a gate line and a data line on the plastic substrate, the pixel circuit on the active buffer layer including a plurality of TFTs and a plurality of component interconnecting nodes.
    Type: Application
    Filed: June 15, 2015
    Publication date: December 31, 2015
    Inventors: Jung-Min LEE, Juhn Suk YOO, Ji No LEE, Jae Soo PARK, Chang Heon KANG, Ho Young KO, Soo Hong KIM, Sung Ki HONG
  • Publication number: 20150287750
    Abstract: Discussed is a flexible display device to reduce a width of a bezel. The flexible display device includes a substrate being formed of a flexible material, a plurality of gate lines and a plurality of data lines crossing each other, a plurality of pads formed in a pad area of a non-display area, a plurality of links formed in a link area of the non-display area a plurality of insulation films formed over the entire surface of the substrate, and a first bending hole formed in a bending area of the non-display area, the first bending hole passing through at least one of the insulation films disposed under the link, wherein the bending area is bent such that the pads are disposed on the lower surface of the substrate.
    Type: Application
    Filed: June 19, 2015
    Publication date: October 8, 2015
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Sang-Cheon YOUN, Hyoung-Suk JIN, Chang-Heon KANG, Se-Yeoul KWON
  • Patent number: 9082667
    Abstract: Discussed is a flexible display device to reduce a width of a bezel. The flexible display device includes a substrate being formed of a flexible material, a plurality of gate lines and a plurality of data lines crossing each other, a plurality of pads formed in a pad area of a non-display area, a plurality of links formed in a link area of the non-display area, a plurality of insulation films formed over the entire surface of the substrate, and a first bending hole formed in a bending area of the non-display area, the first bending hole passing through at least one of the insulation films disposed under the link, wherein the bending area is bent such that the pads are disposed on the lower surface of the substrate.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: July 14, 2015
    Assignee: LG Display Co., Ltd.
    Inventors: Sang-Cheon Youn, Hyoung-Suk Jin, Chang-Heon Kang, Se-Yeoul Kwon
  • Publication number: 20150187281
    Abstract: Provided is an OLED display device including a plurality of pixel each of which includes a light emitting element and a cell driver configured to drive the light emitting element. The cell driver includes: a driving switch element serially connected with the light emitting element between a high voltage supply line and a low voltage supply line; a first switch element configured to, in response to a second scan signal, connect a data line with a first node to which a gate electrode of the driving switch element is connected; a second switch element configured to, in response to a first scan signal, apply a third scan signal to a second node to which a source electrode of the driving switch element is connected; and a third switch element configured to, in response to an emission signal, connect the high voltage supply line with a drain electrode of the driving switch element.
    Type: Application
    Filed: December 30, 2014
    Publication date: July 2, 2015
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Jung Min LEE, Chang Heon KANG
  • Publication number: 20140353670
    Abstract: Discussed is a flexible display device to reduce a width of a bezel. The flexible display device includes a substrate being formed of a flexible material, a plurality of gate lines and a plurality of data lines crossing each other, a plurality of pads formed in a pad area of a non-display area, a plurality of links formed in a link area of the non-display area, a plurality of insulation films formed over the entire surface of the substrate, and a first bending hole formed in a bending area of the non-display area, the first bending hole passing through at least one of the insulation films disposed under the link, wherein the bending area is bent such that the pads are disposed on the lower surface of the substrate.
    Type: Application
    Filed: December 19, 2013
    Publication date: December 4, 2014
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Sang-Cheon YOUN, Hyoung-Suk JIN, Chang-Heon KANG, Se-Yeoul KWON
  • Patent number: 8659576
    Abstract: An Liquid Crystal Display (LCD) with a touch screen function includes an array substrate having a display region and a photosensitive region divided by data lines, scan lines, and common lines, wherein the photosensitive region includes a switching element having a first terminal connected to an (n?1)th scan line to receive a select signal and a second terminal connected to a readout system, a charge storage element having a first terminal connected to a third terminal of the switching element and a second terminal connected to the common lines, and a photosensitive element having a first terminal connected to an nth scan line and a second terminal connected to the first terminal of the charge storage element, wherein when the photosensitive element is turned on according to external illuminance, the charge storage element is discharged and the readout system detects a difference of external illuminance.
    Type: Grant
    Filed: October 6, 2009
    Date of Patent: February 25, 2014
    Assignee: Hydis Technologies Co., Ltd.
    Inventors: Chang Heon Kang, Seong Jun An, Se Jong Yoo, Hyun Chul Nam, Se Hwan Na
  • Publication number: 20120172729
    Abstract: There is disclosed an apparatus for measuring biometric information having a hand rest, which can perform precise and comprehensive measurement by measuring biometric information about an examinee taking a more comfortable position. The apparatus for measuring the biometric information having the hand rest includes a hand rest formed in a concave curvature shape to have an examinee's hand put thereon, to contact with an examinee's palm and fingers; and a measurement part provided in the hand rest to measure the examinee's biometric information.
    Type: Application
    Filed: September 8, 2010
    Publication date: July 5, 2012
    Inventors: Sung Il Yi, Ki Young Kim, Kang Eun Kim, Chang Heon Kang
  • Publication number: 20120172728
    Abstract: There is disclosed an apparatus for measuring biometric information that can perform precise and comprehensive measurement by measuring biometric information about an examinee taking a more comfortable position. The apparatus for measuring biometric information includes a hand rest comprising a hand rest part formed in a concave curvature shape to have an examinee's hand put thereon, to contact with an examinee's palm and fingers; and a measurement part provided in the hand rest part to measure the examinee's biometric information.
    Type: Application
    Filed: September 8, 2010
    Publication date: July 5, 2012
    Applicant: KOREA INSTITIUTE OF INDUSTRIAL TECHNOLOGY
    Inventors: Sung Il Yi, Ki Young Kim, Kang Eun Kim, Chang Heon Kang
  • Publication number: 20100103130
    Abstract: An Liquid Crystal Display (LCD) with a touch screen function includes an array substrate having a display region and a photosensitive region divided by data lines, scan lines, and common lines, wherein the photosensitive region includes a switching element having a first terminal connected to an (n?1)th scan line to receive a select signal and a second terminal connected to a readout system, a charge storage element having a first terminal connected to a third terminal of the switching element and a second terminal connected to the common lines, and a photosensitive element having a first terminal connected to an nth scan line and a second terminal connected to the first terminal of the charge storage element, wherein when the photosensitive element is turned on according to external illuminance, the charge storage element is discharged and the readout system detects a difference of external illuminance.
    Type: Application
    Filed: October 6, 2009
    Publication date: April 29, 2010
    Applicant: HYDIS TECHNOLOGIES CO., LTD.
    Inventors: Chang Heon Kang, Seong Jun An, Se Jong Yoo, Hyun Chul Nam, Se Hwan Na
  • Patent number: 7667790
    Abstract: Disclosed is a reflective type liquid crystal display device. The liquid crystal display device includes: an upper substrate provided with a polarizing plate on one surface of the upper substrate; a lower substrate spaced away from the other surface of the upper substrate; a liquid crystal layer disposed between the upper and lower substrates; a color filter layer formed at a portion on the other surface of the upper substrate; a self-luminous body coated side by side with the color filter layer in a region besides a pixel region on the other surface of the upper substrate, so as to radiate light by itself depending on the electric current; and a transparent ITO layer covered on the color filter layer and the self-luminous body. It is possible to operate the liquid crystal display device without degradation of reflection efficiency in a dark state wherein light introduced from outside is weak.
    Type: Grant
    Filed: November 9, 2006
    Date of Patent: February 23, 2010
    Assignee: Hydis Technologies, Co., Ltd
    Inventors: Chang Heon Kang, Jin Young Chun
  • Patent number: RE49052
    Abstract: Discussed is a flexible display device to reduce a width of a bezel. The flexible display device includes a substrate being formed of a flexible material, a plurality of gate lines and a plurality of data lines crossing each other, a plurality of pads formed in a pad area of a non-display area, a plurality of links formed in a link area of the non-display area a plurality of insulation films formed over the entire surface of the substrate, and a first bending hole formed in a bending area of the non-display area, the first bending hole passing through at least one of the insulation films disposed under the link, wherein the bending area is bent such that the pads are disposed on the lower surface of the substrate.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: April 26, 2022
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Sang-Cheon Youn, Hyoung-Suk Jin, Chang-Heon Kang, Se-Yeoul Kwon
  • Patent number: RE49596
    Abstract: Discussed is a flexible display device to reduce a width of a bezel. The flexible display device includes a substrate being formed of a flexible material, a plurality of gate lines and a plurality of data lines crossing each other, a plurality of pads formed in a pad area of a non-display area, a plurality of links formed in a link area of the non-display area a plurality of insulation films formed over the entire surface of the substrate, and a first bending hole formed in a bending area of the non-display area, the first bending hole passing through at least one of the insulation films disposed under the link, wherein the bending area is bent such that the pads are disposed on the lower surface of the substrate.
    Type: Grant
    Filed: August 21, 2020
    Date of Patent: August 1, 2023
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Sang-Cheon Youn, Hyoung-Suk Jin, Chang-Heon Kang, Se-Yeoul Kwon