Patents by Inventor Hak-Sun Chang

Hak-Sun Chang 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: 20170315411
    Abstract: A display device includes a base substrate; a pixel electrode on the base substrate; a first conductive bar which is adjacent to and separated from a first edge of the pixel electrode in a top plan view, the first conductive bar disposed in a same layer as the pixel electrode; and a common electrode which overlaps the pixel electrode. In the top plan view, the first conductive bar includes: a first body which lengthwise extends along the first edge of the pixel electrode and includes an edge which faces the first edge of the pixel electrode, and a first ridge pattern and a second ridge pattern each protruding from the edge of the first body and toward the pixel electrode, the first and second ridge patterns consecutively disposed along a lengthwise direction of the first body.
    Type: Application
    Filed: January 18, 2017
    Publication date: November 2, 2017
    Inventors: Cheol SHIN, Hak Sun CHANG, Chang Il TAE
  • Patent number: 9759971
    Abstract: An array substrate includes: first and second gate lines extending along a first direction; a data line extending along a second direction crossing the first direction, and being insulated from the first and second gate lines; a pixel electrode disposed in a pixel area defined by the data line, the first gate line, and the second gate line; a first auxiliary electrode overlapping the first gate line; and a second auxiliary electrode disposed between the pixel electrode and the second gate line, the second auxiliary electrode being spaced apart from the second gate line. The pixel electrode includes: a first subpixel electrode disposed adjacent to the first gate line, and having first direction size greater than a second direction size; and a second subpixel electrode spaced apart from the first subpixel electrode in the second direction, and having a first direction size greater than a second direction size.
    Type: Grant
    Filed: April 6, 2015
    Date of Patent: September 12, 2017
    Assignee: Samsung Display Co., Ltd
    Inventors: Hyo Ju Jung, Jang Wi Ryu, Hak Sun Chang, Ki Chul Shin
  • Publication number: 20170248826
    Abstract: A liquid crystal display, including a first substrate; a gate line and a data line disposed on the first substrate; and a pixel electrode connected to the gate line and the data line and comprising a first sub pixel electrode and a second sub pixel electrode disposed on the first substrate. Each of the first sub pixel electrode and the second sub pixel electrode includes a transverse stem; a longitudinal stem; and a plurality of minute branches extending from transverse stem and the longitudinal stem. A width of the first sub pixel electrode is different from a width of the second sub pixel electrode.
    Type: Application
    Filed: May 11, 2017
    Publication date: August 31, 2017
    Inventors: Hak Sun CHANG, Jang Wi RYU, Ki Chul SHIN, Jae-Soo JANG
  • Publication number: 20170242306
    Abstract: A liquid crystal display device includes a base unit, a gate line disposed on the base unit, a data line disposed on the base unit and crossing the gate line while being insulated from the gate line, a shielding electrode disposed on the data line and overlapping the data line and isolated from the pixel electrode and a conductive bar, the conductive bar disposed on the same layer as that on which the shielding electrode is disposed, isolated from the shielding electrode, and extending in parallel to the data line.
    Type: Application
    Filed: January 25, 2017
    Publication date: August 24, 2017
    Inventors: Hak Sun CHANG, Cheol SHIN, Ki Chul SHIN, Se Hyun LEE, Yun Seok LEE
  • Publication number: 20170153517
    Abstract: A liquid crystal display (“LCD”) includes: a substrate on which a pixel region is defined; and a pixel electrode which is disposed in the pixel region on the substrate. The pixel electrode includes: a plurality of unit pixel electrodes which are arranged substantially in a matrix form; and a connecting electrode which connects the unit pixel electrodes to each other. Neighboring unit pixel electrodes adjacent to each other in a column direction are separated from each other by a first in-between area extending along a row direction, neighboring unit pixel electrodes adjacent to each other in the row direction are separated from each other by a second in-between area extending along the column direction, and the connecting electrode is disposed in a region in which corners of the unit pixel electrodes face each other.
    Type: Application
    Filed: June 15, 2016
    Publication date: June 1, 2017
    Inventors: Cheol SHIN, Hak Sun CHANG, Ki Chul SHIN, Se Hyun LEE
  • Patent number: 9659536
    Abstract: A liquid crystal display device includes a plurality of pixels disposed on an insulation substrate in a horizontal direction, and including a thin film transistor region and a display area; and a reference voltage line extended along a center of the display area in a direction perpendicular to the horizontal direction. The display area includes a plurality of domains disposed in two rows, a domain in one of the two rows includes a high-gray subpixel area including a high-gray pixel electrode, and a domain in the other of the two rows includes a low-gray subpixel area including a low-gray pixel electrode. The high-gray pixel electrode and the low-gray pixel electrode each include a plurality of unit pixel electrodes, and each unit pixel electrode includes a center electrode having a planar structure and a plurality of minute branches that extend from a side of the center electrode.
    Type: Grant
    Filed: February 2, 2015
    Date of Patent: May 23, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jang Wi Ryu, Hak Sun Chang, Ki Chul Shin
  • Patent number: 9651834
    Abstract: A liquid crystal including: a first substrate; a pixel electrode disposed on the first substrate and including a first subpixel electrode and a second subpixel electrode disposed in one pixel area; a second substrate facing the first substrate; and a common electrode disposed on the second substrate, wherein an area of a region occupied by the first subpixel electrode is less than an area of a region occupied by the second subpixel electrode. Each of the first and second subpixels has a cross-shaped stem and minute branches extending from it to improve side visibility quality and gray scale uniformity.
    Type: Grant
    Filed: May 2, 2016
    Date of Patent: May 16, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hak Sun Chang, Jang Wi Ryu, Ki Chul Shin, Jae-Soo Jang
  • Publication number: 20170131602
    Abstract: A liquid crystal display includes an insulation substrate, a plurality of pixels disposed on the insulation substrate, where each pixel has a shape elongated in a horizontal direction, and includes a thin film transistor formation region and a display area; and a reference voltage line extending in a vertical direction along a center of the display area, where the display area includes a single high-gray subpixel area and two low-gray subpixel areas, and the single high-gray subpixel area is positioned between the two low-gray subpixel areas.
    Type: Application
    Filed: January 24, 2017
    Publication date: May 11, 2017
    Inventors: Cheol SHIN, Hak Sun CHANG, Jang Wi RYU, Jae-Soo JANG, Ki Chul SHIN, Seong Young LEE
  • Patent number: 9588381
    Abstract: A liquid crystal display includes an insulation substrate, a plurality of pixels disposed on the insulation substrate, where each pixel has a shape elongated in a horizontal direction, and includes a thin film transistor formation region and a display area; and a reference voltage line extending in a vertical direction along a center of the display area, where the display area includes a single high-gray subpixel area and two low-gray subpixel areas, and the single high-gray subpixel area is positioned between the two low-gray subpixel areas.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: March 7, 2017
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Cheol Shin, Hak Sun Chang, Jang Wi Ryu, Jae-Soo Jang, Ki Chul Shin, Seong Young Lee
  • Patent number: 9588377
    Abstract: A liquid crystal display includes a first substrate, a first pixel electrode disposed on the first substrate, a second pixel electrode overlapping the first pixel electrode, having an insulating layer disposed therebetween, wherein the second pixel electrode includes a plate-like part having an integrated shape, a plurality of branch electrodes extending from the plate-like part, and a cruciform cutout including a horizontal part and a vertical part intersecting each other at a center of the plate-like part, and the first pixel electrode includes a cruciform stem electrode having a horizontal stem and a vertical stem intersecting each other at the center.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: March 7, 2017
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Se Hyun Lee, Ka Eun Kim, Cheol Shin, Hak Sun Chang, Ki Chul Shin
  • Patent number: 9568783
    Abstract: Provided is a liquid crystal display including: a first insulation substrate; a thin film transistor positioned on the first insulation substrate; a first subpixel electrode positioned on the thin film transistor and to which a first voltage is applied; a second subpixel electrode positioned on the thin film transistor and to which a second voltage is applied; a second insulation substrate facing the first insulation substrate; a common electrode positioned on the second insulation substrate and receiving a common voltage; and a liquid crystal layer disposed between the first insulation substrate and the second insulation substrate, in which the first subpixel electrode includes a plate region and a minute branch region overlapping the plate region with a passivation layer between the plate region and the minute branch region, and the plate region and the second subpixel electrode are positioned on a same layer.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: February 14, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Se Hyun Lee, Ka Eun Kim, Cheol Shin, Hak Sun Chang, Ki Chul Shin
  • Patent number: 9563093
    Abstract: A liquid crystal display includes a lower substrate and an upper substrate facing each other, a liquid crystal layer provided between the lower substrate and the upper substrate, a plurality of pixel electrodes provided on the lower substrate, extended in a substantially horizontal direction, and including a thin film transistor forming region and a display area, a reference voltage line extended in a substantially vertical direction along a center of the display area, a gate line provided on the lower substrate and extended in the substantially horizontal direction between neighboring pixel electrodes of the plurality of pixel electrodes, a data line provided on the lower substrate and crossing the gate line, and a shield electrode overlapping the gate line and including a curved portion which is disposed on an edge portion of the pixel electrode and overlaps the data line.
    Type: Grant
    Filed: November 3, 2014
    Date of Patent: February 7, 2017
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hak Sun Chang, Ka Eun Kim, Jang Wi Ryu, Ki Chul Shin
  • Patent number: 9547203
    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: Grant
    Filed: April 23, 2015
    Date of Patent: January 17, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Se Hyun Lee, Ka Eun Kim, Ki Chul Shin, Ho Kil Oh, Hak Sun Chang
  • Publication number: 20170010487
    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: September 20, 2016
    Publication date: January 12, 2017
    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: 9541804
    Abstract: A liquid crystal display including: a lower electrode; an upper electrode facing the lower electrode; and a liquid crystal layer disposed between the lower electrode and the upper electrode and including a plurality of liquid crystal molecules aligned perpendicular to surfaces of the lower electrode and the upper electrode, wherein the lower electrode includes a center electrode disposed at the center thereof, a first cutout disposed at the center of the center electrode, and a plurality of minute branches disposed extending outwardly from a side edge of the center electrode, and the upper electrode includes a second cutout disposed between the minute branches and the first cutout, a third cutout connected to upper and lower vertices of the second cutout to form a boundary among a plurality of sub-regions together with the first cutout and a fourth cutout connected to left and right vertices of the second cutout.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: January 10, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Se Hyun Lee, Jang Wi Ryu, Ki Chul Shin, Cheol Shin, Hak Sun Chang
  • Publication number: 20160377941
    Abstract: A liquid crystal display includes a substrate, and a pixel electrode disposed on the substrate. The pixel electrode includes a plurality of micro-branches which are spaced apart from each other and extend side by side with each other, where a micro-slit is defined between the micro-branches, and a stem part which is connected to each of the micro-branches, where an indentation pattern is defined by a cutout portion extending into the stem part, and at least one of two points connecting the indentation pattern and the micro-slit is located on a slit boundary line at which the micro-slit and the stem part meet each other.
    Type: Application
    Filed: June 9, 2016
    Publication date: December 29, 2016
    Inventors: Se Hyun LEE, Cheol SHIN, Hak Sun CHANG
  • Publication number: 20160370668
    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: September 6, 2016
    Publication date: December 22, 2016
    Inventors: Jang Wi RYU, Cheol SHIN, Hak Sun CHANG, Ki Chul SHIN, Ho Kil OH
  • Patent number: 9523877
    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: Grant
    Filed: July 22, 2014
    Date of Patent: December 20, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD
    Inventors: Se Hyun Lee, Hyo Ju Jung, Ki Chul Shin, Ho Kil Oh, Hak Sun Chang
  • Publication number: 20160363823
    Abstract: A liquid crystal display includes a first panel including a first electrode, which includes side electrodes in edge areas of a pixel, a central electrode connected to the side electrodes and disposed in a central area of the pixel, and fine branches, some of which are connected to the side electrode, a second panel in which a cutout, which corresponds to the first electrode and divides the fine branches, the central electrode and the side electrode into domains is defined, and which includes a second electrode, which is separated by the cutout and corresponds to each of the domains, where second slit patterns, which are provided by partially cutting out ends of the fine branches, separate the side electrodes and the fine branches from each other, and extend in parallel to a longitudinal direction of the side electrodes are defined in the first panel.
    Type: Application
    Filed: May 25, 2016
    Publication date: December 15, 2016
    Inventors: Se Hyun LEE, Cheol SHIN, Hak Sun CHANG, Ki Chul SHIN
  • Publication number: 20160342040
    Abstract: A display device may include a liquid crystal layer and a pixel electrode that overlaps the liquid crystal layer. The pixel electrode may include a first bar, a second bar, a third bar, and a plurality of first-type branches. The second bar may be directly connected to a first end of the first bar. The third bar may be directly connected to a first end of the second bar or directly connected to a second end of the first bar. The first-type branches may be slanted with respected to the first bar and may be positioned between the third bar and at least one of the first bar and the second bar.
    Type: Application
    Filed: November 4, 2015
    Publication date: November 24, 2016
    Inventors: Se Hyun LEE, Hak Sun CHANG, Cheol SHIN