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: 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: 20160097956
    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 upper and lower vertices of the second cutout.
    Type: Application
    Filed: May 13, 2015
    Publication date: April 7, 2016
    Inventors: Se Hyun LEE, Jang Wi RYU, Ki Chul SHIN, Cheol SHIN, Hak Sun CHANG
  • Publication number: 20160097953
    Abstract: A liquid crystal display includes a lower panel electrode including a lower panel unit electrode, an upper panel electrode including an upper panel unit electrode facing the lower panel unit electrode, and a liquid crystal layer between the lower panel electrode and the upper panel electrode and including liquid crystal molecules, where the lower panel unit electrode includes a center electrode disposed at a center thereof, minute branches which extends from an edge side of the center electrode to an outside, and a first cutout is defined in the center of the center electrode, and the a second cutout is defined in the upper panel unit electrode between the minute branches and the first cutout, and a third cutout is connected to the second cutout and defines a boundary between subregions together with the first cutout.
    Type: Application
    Filed: May 20, 2015
    Publication date: April 7, 2016
    Inventors: Hak Sun CHANG, Cheol SHIN, Jang Wi RYU, Ki Chul SHIN, Jae-Soo JANG
  • Publication number: 20160097955
    Abstract: A liquid crystal display includes a lower electrode, an upper electrode facing the lower electrode, and a liquid crystal layer disposed between the lower electrode and the upper electrode. The lower electrode includes: a center electrode disposed at its center and the center electrode has a polygonal shape including diagonal sides, left and right sides, and upper and lower sides; as first cutout disposed at a center of the center electrode; a plurality of minute branches extending out from the diagonal sides; and a plurality of auxiliary minute branches extending out from the left and right sides. The upper electrode includes a second cutout disposed between the minute branches and the first cutout, and a third cutout connected to the second cutout to form a boundary between a plurality of subregions together with the first cutout, and the left and right sides are inclined at a predetermined angle.
    Type: Application
    Filed: March 19, 2015
    Publication date: April 7, 2016
    Inventors: Ka Eun KIM, Cheol SHIN, Hak Sun CHANG, Ki Chul SHIN, Se Hyun LEE
  • Patent number: 9274377
    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: Grant
    Filed: September 13, 2012
    Date of Patent: March 1, 2016
    Assignee: Samsung Display Co., Ltd.
    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: 20160054628
    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: November 3, 2015
    Publication date: February 25, 2016
    Inventors: Hak Sun CHANG, Jang Wi RYU, Ki Chul SHIN, Jae-Soo JANG
  • Patent number: 9213209
    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: March 15, 2013
    Date of Patent: December 15, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hak Sun Chang, Jang Wi Ryu, Ki Chul Shin, Jae-Soo Jang
  • Patent number: 9202402
    Abstract: The present invention relates to a three-dimensional image display device and a driving method thereof. A three-dimensional image display device according to an exemplary embodiment of the present invention includes: a display panel assembly including a display panel including a plurality of pixels alternately displaying a left eye image and a right eye image and a data driver transmitting a data voltage to the plurality of pixels; and a shutter member including a left eye shutter and a right eye shutter, wherein a display period of an insertion image is positioned between a display period of the left eye image and a display period of the right eye image, a minimum gray of the left eye image or the right eye image is a first gray that is greater than 0 gray, and a gray of the insertion image is a second gray that is smaller the first gray.
    Type: Grant
    Filed: May 4, 2012
    Date of Patent: December 1, 2015
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hak Sun Chang, Jang Wi Ryu, Hyo Ju Jung, Gak Seok Lee
  • Publication number: 20150323845
    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: Application
    Filed: November 3, 2014
    Publication date: November 12, 2015
    Inventors: Hak Sun CHANG, Ka Eun KIM, Jang Wi RYU, Ki Chul SHIN
  • 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
  • Patent number: 9158169
    Abstract: Provided is a liquid crystal display to provide improved transmittance and visibility includes a first substrate; a first switching element and a second switching element formed on the first substrate configured to be switched by the same signal; a first subpixel electrode connected to the first switching element; a second subpixel electrode connected to the second switching element; a third switching element connected to the second switching element; a third subpixel electrode connected to the third switching element; a second substrate; a common electrode formed on the second substrate; and a liquid crystal layer formed between the first substrate and the second substrate.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: October 13, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Kyoung Ju Shin, Hak Sun Chang, Yong Hwan Shin
  • Publication number: 20150243240
    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: Application
    Filed: February 2, 2015
    Publication date: August 27, 2015
    Inventors: Jang Wi RYU, Hak Sun CHANG, Ki Chul SHIN
  • 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: 9081232
    Abstract: A display panel includes a gate line, a data line, a pixel electrode formed adjacent to the gate and data lines on a lower substrate and a first alignment film disposed in a first domain disposed on the pixel electrode and in a second domain formed on pixel electrode. The first domain is aligned in a first direction and the second domain is aligned in a second direction which is different from the first direction. The upper substrate opposes the lower substrate and includes a common electrode disposed on the upper substrate and a second alignment film disposed on the common electrode at a third domain corresponding to the first domain and at a fourth domain corresponding to the second domain. The liquid crystal layer is disposed between the lower substrate and the upper substrate and includes liquid crystals defined by a plurality of pixel areas.
    Type: Grant
    Filed: December 11, 2012
    Date of Patent: July 14, 2015
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hak-Sun Chang, Jang-Wi Ryu, Gak-Seok Lee, Jun-Woo Lee, Hee-Hwan Lee, Hyo-Ju 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: 20150146126
    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: September 19, 2014
    Publication date: May 28, 2015
    Inventors: Cheol SHIN, Hak Sun CHANG, Jang Wi RYU, Jae-Soo JANG, Ki Chul SHIN, Seong Young LEE
  • Publication number: 20150103281
    Abstract: Provided is a liquid crystal display to provide improved transmittance and visibility includes a first substrate; a first switching element and a second switching element formed on the first substrate configured to be switched by the same signal; a first subpixel electrode connected to the first switching element; a second subpixel electrode connected to the second switching element; a third switching element connected to the second switching element; a third subpixel electrode connected to the third switching element; a second substrate; a common electrode formed on the second substrate; and a liquid crystal layer formed between the first substrate and the second substrate.
    Type: Application
    Filed: December 16, 2014
    Publication date: April 16, 2015
    Inventors: Kyoung Ju SHIN, Hak Sun CHANG, Yong Hwan SHIN
  • Patent number: 8982309
    Abstract: A liquid crystal display device includes a substrate, a thin film transistor disposed on the substrate, a plurality of color filters disposed on the substrate, a light blocking member disposed between the plurality of color filters and on the thin film transistor, and a pixel electrode disposed on at least one of the plurality of color filters. The pixel electrode comprises a planar shape electrode and a plurality of minute branches extending from the planar shape electrode. The at least one of the plurality of color filters or the light blocking member comprises a step forming portion overlapped by the planar shape electrode.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: March 17, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jae-Soo Jang, Hak-Sun Chang, Jang Wi Ryu, Ki Chul Shin
  • Publication number: 20150049289
    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: Application
    Filed: January 7, 2014
    Publication date: February 19, 2015
    Applicant: Samsung Display Co., Ltd.
    Inventors: Jae-Soo JANG, Jang Wi RYU, Cheol SHIN, Hak Sun CHANG, Ki Chul SHIN