Patents by Inventor Ho-Kil Oh

Ho-Kil Oh 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: 9500917
    Abstract: The present invention relates to a liquid crystal display including: a lower electrode including a unit pixel electrode; an upper electrode including an upper unit electrode facing the unit pixel electrode; and a liquid crystal layer between the lower electrode and the upper electrode and including a plurality of liquid crystal molecules aligned approximately perpendicular to the surfaces of the lower electrode and the upper electrode in the absence of an electric field, wherein the unit pixel electrode includes a stem forming a boundary between a plurality of sub-regions and a plurality of minute branches extending in different directions in two different sub-regions, the upper unit electrode includes an opening facing the stem and extending parallel to the stem, any alignment aid to pretilt the liquid crystal molecules is absent, and a length of the minute branches is equal to or less than about 53 ?m.
    Type: Grant
    Filed: July 3, 2013
    Date of Patent: November 22, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jang Wi Ryu, Cheol Shin, Hak Sun Chang, Ki Chul Shin, Jae-Soo Jang, Ka Eun Kim, Ho Kil Oh, Se Hyun Lee, Hyo Ju Jung, Sang Hyeon Song, Sang Jin Jeon
  • Patent number: 9482909
    Abstract: A liquid crystal display according to an embodiment includes: a lower panel including a pixel electrode having a first subpixel electrode and a second subpixel electrode and an insulating layer between the first subpixel electrode and the second subpixel electrode; an upper panel including a common electrode; and a liquid crystal layer disposed between the lower panel and the upper panel. The first subpixel electrode includes a first plate portion, a first stem having a cross portion extending from the first plate portion and a protrusion extending from the cross portion, and a plurality of first branches extending from the first plate portion and the first stem. The second subpixel electrode includes a second plate portion having an opening and a plurality of second branches extending from the second plate portion. The cross portion does not overlap with the second plate portion. The protrusion overlaps with the second plate portion.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: November 1, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Se Hyun Lee, Hak Sun Chang, Ki Chul Shin, Jang Wi Ryu, Cheol Shin, Ho Kil Oh
  • Patent number: 9470934
    Abstract: A liquid crystal display includes: a lower panel electrode including a lower panel unit electrodes; an upper panel electrode including an upper panel unit electrodes facing the lower panel unit electrodes; and a liquid crystal layer disposed between the lower panel electrode and the upper panel electrode, in which the lower panel unit electrode includes a stem portion which defines a boundary between a plurality of sub-regions therein, a center pattern disposed at a center of the stem portion and in which overlaps the sub-regions, and a plurality of micro branch portions which extends from the center pattern, where extending directions of the micro branch portions in different regions are different from each other, and an end portion of the micro branch portions is extended in a direction different from an extending direction thereof.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: October 18, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jang Wi Ryu, Cheol Shin, Hak Sun Chang, Ki Chul Shin, Ho Kil Oh
  • Patent number: 9437625
    Abstract: A display panel includes a first pixel electrode electrically connected to a first switching electrode, and includes a plurality of first branches forming micro slits, a second pixel electrode electrically connected to a second switching electrode, and including a plurality of second branches forming micro slits, and a third pixel electrode electrically connected to a third switching electrode, and including a plurality of third branches forming micro slits. The first branches are spaced apart from each other by a first space, and have a first width. The second branches are spaced apart from each other by a second space, and have a second width. The third branches are spaced apart from each other by a third space, and have a third width. At least one of the first width, the second width and the third width is different from the other widths.
    Type: Grant
    Filed: January 21, 2014
    Date of Patent: September 6, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ka-Eun Kim, Jang-Wi Ryu, Ho-Kil Oh, Se-Hyun Lee, Ki-Chul Shin
  • Publication number: 20160252795
    Abstract: A liquid crystal display includes: a first substrate, a second substrate facing the first substrate, a liquid crystal layer interposed between the first substrate and the second substrate and including liquid crystal molecules, a gate line positioned on the first substrate, a data line positioned on the first substrate and crossing the gate line, a first thin film transistor and a second thin film transistor connected to the gate line and the data line, a third thin film transistor connected to the gate line and the second thin film transistor, a reference voltage line connected to the third thin film transistor, and a pixel electrode including a first subpixel electrode connected to the first thin film transistor and a second subpixel electrode connected to the second thin film transistor.
    Type: Application
    Filed: May 11, 2016
    Publication date: September 1, 2016
    Inventors: Su-Jeong KIM, Ki-Chul SHIN, Hoon KIM, Hyung-Guel KIM, Joo-Seok YEOM, Jae-Jin SONG, Ho-Kil OH, Yoon-Jang KIM, Jae-Hoon JUNG, Kwang-Chul JUNG
  • Patent number: 9405157
    Abstract: A liquid crystal display, including a lower panel electrode including at least one lower panel unit electrode, an upper panel electrode including at least one upper panel unit electrode facing the at least one lower panel unit electrode, and a liquid crystal layer disposed between the lower panel electrode and the upper panel electrode, wherein the lower panel unit electrode includes a stem part forming borders between a plurality of sub-regions; a center pattern including a plurality of straight line sides respectively disposed at the plurality of sub-regions, and a plurality of fine branch parts extending out from the center pattern, the stem part includes a horizontal stem part and a vertical stem part, and angles that the horizontal stem part and the vertical stem part form with the respective straight line sides of the center pattern are different from each other.
    Type: Grant
    Filed: May 9, 2014
    Date of Patent: August 2, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ho Kil Oh, Cheol Shin, Ka Eun Kim, Hyo Ju Jung, Ki Chul Shin
  • Publication number: 20160147118
    Abstract: A liquid crystal display according to an embodiment includes: a lower panel including a pixel electrode having a first subpixel electrode and a second subpixel electrode and an insulating layer between the first subpixel electrode and the second subpixel electrode; an upper panel including a common electrode; and a liquid crystal layer disposed between the lower panel and the upper panel. The first subpixel electrode includes a first plate portion, a first stem having a cross portion extending from the first plate portion and a protrusion extending from the cross portion, and a plurality of first branches extending from the first plate portion and the first stem. The second subpixel electrode includes a second plate portion having an opening and a plurality of second branches extending from the second plate portion. The cross portion does not overlap with the second plate portion. The protrusion overlaps with the second plate portion.
    Type: Application
    Filed: May 12, 2015
    Publication date: May 26, 2016
    Inventors: Se Hyun LEE, Hak Sun CHANG, Ki Chul SHIN, Jang Wi RYU, Cheol SHIN, Ho Kil OH
  • Patent number: 9341907
    Abstract: A liquid crystal display includes: a first substrate, a second substrate facing the first substrate, a liquid crystal layer interposed between the first substrate and the second substrate and including liquid crystal molecules, a gate line positioned on the first substrate, a data line positioned on the first substrate and crossing the gate line, a first thin film transistor and a second thin film transistor connected to the gate line and the data line, a third thin film transistor connected to the gate line and the second thin film transistor, a reference voltage line connected to the third thin film transistor, and a pixel electrode including a first subpixel electrode connected to the first thin film transistor and a second subpixel electrode connected to the second thin film transistor.
    Type: Grant
    Filed: July 17, 2015
    Date of Patent: May 17, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Su-Jeong Kim, Ki-Chul Shin, Hoon Kim, Hyung-Guel Kim, Joo-Seok Yeom, Jae-Jin Song, Ho-Kil Oh, Yoon-Jang Kim, Jae-Hoon Jung, Kwang-Chul Jung
  • Publication number: 20160109766
    Abstract: A liquid crystal display, including: a first substrate; a pixel electrode formed on the first substrate and including a first subpixel electrode and a second subpixel electrode which are separated from each other; a second substrate facing the first substrate; a common electrode formed on the second substrate; and a liquid crystal layer positioned between the first substrate and the second substrate, wherein the first subpixel electrode includes a first part having a plurality of first branch electrodes, the second subpixel electrode includes a second part which is positioned to at least partially surround the first branch electrodes, and a plurality of second branch electrodes which extend from the second part and are defined by a plurality of first opens. Portions of the first opens proximate to the second part are wider than other portions of the first opens.
    Type: Application
    Filed: October 21, 2015
    Publication date: April 21, 2016
    Inventors: Ho Kil OH, Ka Eun KIM, Cheol SHIN, Se Hyun LEE, Hak Sun CHANG, Ki Chul SHIN
  • Publication number: 20160033834
    Abstract: A display according to exemplary embodiments includes: a substrate; a first gate line, a second gate line, and a data line disposed on the substrate; a plurality of pixels including a first subpixel and a second subpixel connected to the first gate line and the data line, the first subpixel including a first subpixel electrode and the second subpixel including a second subpixel electrode; a first switching element connected to the first gate line and a first voltage line, and configured to control a voltage of a first capacitor connected to the first subpixel electrode; a second switching element connected to the second gate line, a second voltage line, and the first capacitor, and configured to control the voltage of the first capacitor; and a third switching element connected to the first gate line, the second subpixel electrode and configured to control the voltage of the second subpixel electrode.
    Type: Application
    Filed: October 12, 2015
    Publication date: February 4, 2016
    Inventors: Hoon KIM, Ki-Chul SHIN, Su-Jeong KIM, Ho-Kil OH, Jae-Hoon JUNG
  • Publication number: 20160011468
    Abstract: A liquid crystal display including: a substrate; an insulating layer formed on the substrate; a step providing grooves formed on the insulating layer; and a pixel electrode formed on the insulating layer, and configured to include a partial plate electrode and a plurality of minute branch electrodes extending from the partial plate electrode. A sidewall of each of the step providing grooves is perpendicular to a bottom surface, and a planar shape of the step providing grooves is formed of right triangles each having a first side, a second side, and a hypotenuse that connects the first side with the second side, and an angle between the first side and the hypotenuse is 45° or below.
    Type: Application
    Filed: November 24, 2014
    Publication date: January 14, 2016
    Inventors: Se Hyun LEE, Jae-Soo Jang, Ho Kil Oh, Hyo Ju Jung, Ki Chul Shin
  • Publication number: 20150323847
    Abstract: A liquid crystal display includes: a first substrate, a second substrate facing the first substrate, a liquid crystal layer interposed between the first substrate and the second substrate and including liquid crystal molecules, a gate line positioned on the first substrate, a data line positioned on the first substrate and crossing the gate line, a first thin film transistor and a second thin film transistor connected to the gate line and the data line, a third thin film transistor connected to the gate line and the second thin film transistor, a reference voltage line connected to the third thin film transistor, and a pixel electrode including a first subpixel electrode connected to the first thin film transistor and a second subpixel electrode connected to the second thin film transistor.
    Type: Application
    Filed: July 17, 2015
    Publication date: November 12, 2015
    Inventors: Su-Jeong KIM, Ki-Chul SHIN, Hoon KIM, Hyung-Guel KIM, Joo-Seok YEOM, Jae-Jin SONG, Ho-Kil OH, Yoon-Jang KIM, Jae-Hoon JUNG, Kwang-Chul JUNG
  • Publication number: 20150316821
    Abstract: A liquid crystal display including a first substrate, a pixel electrode on the first substrate and including a first subpixel electrode and a second subpixel electrode separated from the first subpixel electrode, a second substrate facing the first substrate, a common electrode on the second substrate, and a liquid crystal layer between the first substrate and the second substrate, wherein the first subpixel electrode includes a first plate-shaped portion and first branch electrodes extending from the first plate-shaped portion, wherein the second subpixel electrode includes a second plate-shaped portion configured to enclose surroundings of the first branch electrode and second branch electrodes extending from the second plate-shaped portion, and wherein a difference between a first voltage applied to the first subpixel electrode and a common voltage applied to the common electrode is larger than a difference between a second voltage applied to the second subpixel electrode and the common voltage.
    Type: Application
    Filed: April 23, 2015
    Publication date: November 5, 2015
    Inventors: Se Hyun Lee, Ka Eun Kim, Ki Chul Shin, Ho Kil Oh, Hak Sun Chang
  • Publication number: 20150309375
    Abstract: A liquid crystal display includes: a first substrate; a pixel electrode on the first substrate and including a first subpixel electrode and a second subpixel electrode which are separated from each other; a second substrate facing the first substrate; a common electrode on the second substrate; and a liquid crystal layer between the first substrate and the second substrate, in which the first subpixel electrode includes a first plate-shaped portion and a plurality of first branch electrodes extended from the first plate-shaped portion, the second subpixel electrode includes a second plate-shaped portion surrounds the first branch electrodes and a plurality of second branch electrodes extended from the second plate-shaped portion, and a difference between a first voltage applied to the first subpixel electrode and a common voltage applied to the common electrode is larger than a difference between a second voltage applied to the second subpixel electrode and the common voltage.
    Type: Application
    Filed: April 24, 2015
    Publication date: October 29, 2015
    Inventors: Hak Sun Chang, Cheol Shin, Jae-Soo Jang, Ki Chul Shin, Jang Wi Ryu, Ho Kil Oh, Ka Eun Kim, Se Hyun Lee, Hyo Ju Jung
  • Publication number: 20150205168
    Abstract: A liquid crystal display includes: a lower panel electrode including a lower panel unit electrodes; an upper panel electrode including an upper panel unit electrodes facing the lower panel unit electrodes; and a liquid crystal layer disposed between the lower panel electrode and the upper panel electrode, in which the lower panel unit electrode includes a stem portion which defines a boundary between a plurality of sub-regions therein, a center pattern disposed at a center of the stem portion and in which overlaps the sub-regions, and a plurality of micro branch portions which extends from the center pattern, where extending directions of the micro branch portions in different regions are different from each other, and an end portion of the micro branch portions is extended in a direction different from an extending direction thereof.
    Type: Application
    Filed: December 16, 2013
    Publication date: July 23, 2015
    Applicant: Samsung Display Co., Ltd.
    Inventors: Jang Wi RYU, Cheol SHIN, Hak Sun CHANG, Ki Chul SHIN, Ho Kil OH
  • Patent number: 9087490
    Abstract: A liquid crystal display includes: a first substrate, a second substrate facing the first substrate, a liquid crystal layer interposed between the first substrate and the second substrate and including liquid crystal molecules, a gate line positioned on the first substrate, a data line positioned on the first substrate and crossing the gate line, a first thin film transistor and a second thin film transistor connected to the gate line and the data line, a third thin film transistor connected to the gate line and the second thin film transistor, a reference voltage line connected to the third thin film transistor, and a pixel electrode including a first subpixel electrode connected to the first thin film transistor and a second subpixel electrode connected to the second thin film transistor.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: July 21, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Su-Jeong Kim, Ki-Chul Shin, Yoon-Jang Kim, Hoon Kim, Hyung-Guel Kim, Joo-Seok Yeom, Jae-Jin Song, Ho-Kil Oh, Jae-Hoon Jung, Kwang-Chul Jung
  • Publication number: 20150185541
    Abstract: A liquid crystal display device includes: a first insulation substrate, a color filter disposed on the first insulation substrate and including a stepped region, a passivation layer disposed on the color filter and including an opening region overlapping with the stepped region, a pixel electrode disposed on the passivation layer including the opening region, a second insulation substrate facing the first insulation substrate, a common electrode disposed on the second insulation substrate and including a cross-shaped cutout, and a liquid crystal layer disposed between the first and second insulation substrates.
    Type: Application
    Filed: July 22, 2014
    Publication date: July 2, 2015
    Inventors: SE HYUN LEE, HYO JU JUNG, KI CHUL SHIN, HO KIL OH, HAK SUN CHANG
  • Publication number: 20150116641
    Abstract: A liquid crystal display, including a lower panel electrode including at least one lower panel unit electrode, an upper panel electrode including at least one upper panel unit electrode facing the at least one lower panel unit electrode, and a liquid crystal layer disposed between the lower panel electrode and the upper panel electrode, wherein the lower panel unit electrode includes a stem part forming borders between a plurality of sub-regions; a center pattern including a plurality of straight line sides respectively disposed at the plurality of sub-regions, and a plurality of fine branch parts extending out from the center pattern, the stem part includes a horizontal stem part and a vertical stem part, and angles that the horizontal stem part and the vertical stem part form with the respective straight line sides of the center pattern are different from each other.
    Type: Application
    Filed: May 9, 2014
    Publication date: April 30, 2015
    Applicant: Samsung Display Co., Ltd.
    Inventors: Ho Kil OH, Cheol Shin, Ka Eun Kim, Hyo Ju Jung, Ki Chul Shin
  • Publication number: 20150062474
    Abstract: A display panel includes a first pixel electrode electrically connected to a first switching electrode, and includes a plurality of first branches forming micro slits, a second pixel electrode electrically connected to a second switching electrode, and including a plurality of second branches forming micro slits, and a third pixel electrode electrically connected to a third switching electrode, and including a plurality of third branches forming micro slits. The first branches are spaced apart from each other by a first space, and have a first width. The second branches are spaced apart from each other by a second space, and have a second width. The third branches are spaced apart from each other by a third space, and have a third width. At least one of the first width, the second width and the third width is different from the other widths.
    Type: Application
    Filed: January 21, 2014
    Publication date: March 5, 2015
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: KA-EUN KIM, Jang-Wi Ryu, Ho-Kil Oh, Se-Hyun Lee, Ki-Chul Shin
  • Publication number: 20140267994
    Abstract: The present invention relates to a liquid crystal display including: a lower electrode including a unit pixel electrode; an upper electrode including an upper unit electrode facing the unit pixel electrode; and a liquid crystal layer between the lower electrode and the upper electrode and including a plurality of liquid crystal molecules aligned approximately perpendicular to the surfaces of the lower electrode and the upper electrode in the absence of an electric field, wherein the unit pixel electrode includes a stem forming a boundary between a plurality of sub-regions and a plurality of minute branches extending in different directions in two different sub-regions, the upper unit electrode includes an opening facing the stem and extending parallel to the stem, any alignment aid to pretilt the liquid crystal molecules is absent, and a length of the minute branches is equal to or less than about 53 ?m.
    Type: Application
    Filed: July 3, 2013
    Publication date: September 18, 2014
    Inventors: Jang Wi RYU, Cheol SHIN, Hak Sun CHANG, Ki Chul SHIN, Jae-Soo JANG, Ka Eun KIM, Ho Kil OH, Se Hyun LEE, Hyo Ju JUNG, Sang Hyeon SONG, Sang Jin JEON