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).

  • 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
  • Publication number: 20160320678
    Abstract: A liquid crystal display includes a first substrate, a gate line the first substrate, an insulating layer the gate line, and pixel electrodes the insulating layer, where the pixel electrodes include a first pixel electrode, a second pixel electrode, and a third pixel electrode neighboring to each other, each of the first pixel electrode, the second pixel electrode, and the third pixel electrode includes a vertical stem part, a horizontal stem part, and fine branch parts extended from each horizontal stem part and each vertical stem part to both opposite sides in a diagonal direction, the fine branch parts of the first pixel electrode are alternately branched to the both opposite sides of the horizontal stem part and the vertical stem part, and the second pixel electrode and the third pixel electrode include an outer side part enclosing an edge of each pixel electrode.
    Type: Application
    Filed: March 18, 2016
    Publication date: November 3, 2016
    Inventors: Cheol SHIN, Hak Sun CHANG, Ki Chul SHIN
  • Publication number: 20160321978
    Abstract: A liquid crystal display according to an exemplary embodiment of the present inventive concept includes: a plurality of pixels including a plurality of pixel electrodes formed on a first substrate and including first domain division means, and a common electrode formed on a second substrate that faces the first substrate and including second domain division means; a gate driver and a data driver connected to the plurality of pixels; and a compensation controller connected to the data driver, the compensation controller transmits compensation voltages to the data driver, wherein, when viewed on the same plane, distances between the first domain division means and the second domain division means are changed according to a location of the plurality of pixels, and wherein the compensation voltages are changed corresponding to the distances between the first domain division means and the second domain division means.
    Type: Application
    Filed: April 13, 2016
    Publication date: November 3, 2016
    Inventors: Hak Sun CHANG, Cheol SHIN, Ki Chul SHIN
  • 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
  • Publication number: 20160291410
    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: Application
    Filed: November 11, 2015
    Publication date: October 6, 2016
    Inventors: Se Hyun LEE, Ka Eun KIM, Cheol SHIN, Hak Sun CHANG, Ki Chul SHIN
  • Publication number: 20160246133
    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: Application
    Filed: May 2, 2016
    Publication date: August 25, 2016
    Inventors: Hak Sun Chang, Jang Wi Ryu, Ki Chul Shin, Jae-Soo Jang
  • Publication number: 20160216573
    Abstract: An exemplary embodiment of the present system and method provides a liquid crystal display including: a first substrate; a first electrode formed on the first substrate; a second substrate configured to face the first substrate; and a second electrode formed on the second substrate, wherein the first electrode includes a first portion having a plate shape and a plurality of branch electrodes extended from the first portion, the second electrode includes a cross-shaped cutout including a horizontal stem and a vertical stem that cross each other at a center thereof, and the vertical stem of the cross-shaped cutout includes a first portion having a width that is increased from an end of the first portion of the vertical stem toward the center.
    Type: Application
    Filed: December 11, 2015
    Publication date: July 28, 2016
    Inventors: Ka Eun KIM, Cheol SHIN, Hak Sun CHANG, Ki Chul SHIN, Se Hyun LEE
  • Publication number: 20160202572
    Abstract: A liquid crystal display including a partial plate electrode along with a minute pattern in pixel electrode thereby increasing the viewing angle and the lateral visibility of the liquid crystal display, as well as the response speed A step provider is provided to reinforce the control force of the liquid crystal molecules, thereby reducing the texture generated in the center of the pixel.
    Type: Application
    Filed: February 23, 2016
    Publication date: July 14, 2016
    Inventors: Hak Sun CHANG, Eun-Kil PARK, Hyun-Ho KANG, Jang Wi RYU, Seung-Suk YANG, Ki Chul SHIN, Se Hyun LEE, Jae-Soo JANG, Hyo Ju JUNG
  • Publication number: 20160202569
    Abstract: A liquid crystal display (LCD) may include: a lower display panel having a pixel electrode positioned therein, the pixel electrode including one or more pixel unit electrodes; an upper display panel having a common electrode positioned therein, the common electrode including one or more common unit electrodes; and a liquid crystal layer positioned between the lower display panel and the upper display panel. The pixel unit electrode may include a plate part and fine branches extending from the plate part, the common unit electrode may include a cross-shaped opening, and a vertical opening of the cross-shaped opening is completely covered by the plate part without extending to an edge of the polygonal shape of the plate part.
    Type: Application
    Filed: December 11, 2015
    Publication date: July 14, 2016
    Inventors: Se Hyun LEE, Cheol SHIN, Hak Sun CHANG, Ka Eun KIM, Ki Chul SHIN
  • Publication number: 20160202568
    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: Application
    Filed: October 20, 2015
    Publication date: July 14, 2016
    Inventors: Se Hyun LEE, Ka Eun KIM, Cheol SHIN, Hak Sun CHANG, Ki Chul SHIN
  • Publication number: 20160195781
    Abstract: A liquid crystal display device includes: a first substrate; a pixel electrode formed on the first substrate; a second substrate corresponding to the first substrate; and a common electrode formed on the second substrate. The pixel electrode includes: a central electrode, an outer portion connected to the central electrode and extending along an edge of the pixel electrode; and a fine branch portion extending from a side of the central electrode and spaced apart from the outer portion, wherein a cross-shaped opening is formed in the common electrode.
    Type: Application
    Filed: December 31, 2015
    Publication date: July 7, 2016
    Inventors: Se Hyun Lee, Cheol Shin, Hak Sun Chang, Ka Eun Kim, Ki Chul Shin
  • Patent number: 9372362
    Abstract: A liquid crystal display includes a first substrate, a plurality of pixel electrodes disposed on the first substrate and including a first sub-pixel electrode and a second sub-pixel electrode, the first sub-pixel electrode and the second sub-pixel electrode respectively including a cruciform stem part, and a plurality of fine branch parts which extends from the cruciform stem part, and a liquid crystal layer interposed between the first substrate and a second substrate facing the first substrate, the second substrate including a common electrode in which an opening corresponding to the cruciform stem part of the pixel electrode is defined.
    Type: Grant
    Filed: January 7, 2014
    Date of Patent: June 21, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jae-Soo Jang, Jang Wi Ryu, Cheol Shin, Hak Sun Chang, Ki Chul Shin
  • Patent number: 9366916
    Abstract: A liquid crystal display device includes a lower panel having a lower substrate. A pixel electrode is formed on the lower substrate and includes a partial plate electrode and a plurality of minute branch electrodes extending from the partial plate electrode. A lower layer is formed on the lower substrate and below the pixel electrode and includes an inclined portion. An upper panel includes an upper substrate facing the lower substrate and a common electrode formed on the upper substrate. A liquid crystal layer is positioned between the lower panel and the upper panel, in which a part of the inclined portion is overlapped with a part of the minute branch electrode.
    Type: Grant
    Filed: September 4, 2013
    Date of Patent: June 14, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hak Sun Chang, Jang Wi Ryu, Jae-Soo Jang, Ki Chul Shin
  • Publication number: 20160147119
    Abstract: A liquid crystal display (LCD) is provided. A liquid crystal display (LCD) comprising a first pixel electrode portion; a second pixel electrode portion disposed adjacent to the first pixel electrode portion in a first direction; and a first data line, extending substantially in a second direction, configured to apply a data voltage to the first pixel electrode portion; wherein the data line comprises a first line portion overlapping the first pixel electrode portion and a second line portion overlapping the second pixel electrode portion.
    Type: Application
    Filed: June 25, 2015
    Publication date: May 26, 2016
    Inventors: Hak Sun CHANG, Cheol Shin, Ka Eun Kim, Ki Chul Shin, Se Hyun Lee
  • 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
  • Publication number: 20160124272
    Abstract: In summary, when the alignment layer aligns the adjacent liquid crystal molecules while producing the pretilt, the present invention basically forms a different pretilt of the alignment layer of the upper substrate or the alignment layer of the lower substrate, or basically forms a different pretilt of the alignment layer of the high gray subpixel and the alignment layer of the low gray subpixel in one pixel, and as a result, the visibility is improved in the sides (the upper side or the right and left sides).
    Type: Application
    Filed: January 8, 2016
    Publication date: May 5, 2016
    Inventors: Young-Gu KIM, Jin-Soo JUNG, Hak-Sun CHANG
  • Patent number: 9329442
    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: November 3, 2015
    Date of Patent: May 3, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hak Sun Chang, Jang Wi Ryu, Ki Chul Shin, Jae-Soo Jang
  • Publication number: 20160116806
    Abstract: A liquid crystal display according to m exemplary embodiment of the present invention includes: a first substrate; a gate line formed on the first substrate; an insulating layer formed on the gate line; and a first subpixel electrode and a second subpixel electrode that are formed on the insulating layer. Each of the first subpixel electrode and the second, subpixel electrode includes a first subregion and a second subregion. At least one of the first subregion and the second subregion Includes a vertical stem, a horizontal stem extending from a middle of the vertical stem, and a plurality of minute branches laterally extending in a diagonal direction from the horizontal stem. The plurality of minute branches laterally extending from the horizontal stem are alternately branched with reference to the horizontal stem.
    Type: Application
    Filed: October 13, 2015
    Publication date: April 28, 2016
    Inventors: Cheol SHIN, Hak Sun CHANG, Ka Eun KIM, Se Hyun LEE, Ki Chul SHIN
  • Publication number: 20160109774
    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: Application
    Filed: April 6, 2015
    Publication date: April 21, 2016
    Inventors: Hyo Ju JUNG, Jang Wi RYU, Hak Sun CHANG, Ki Chul SHIN