Patents by Inventor Hwa-Sung Woo

Hwa-Sung Woo 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: 20190196266
    Abstract: A curved display device comprises: a first substrate and a second substrate facing each other and having a curvature; a liquid crystal layer between the first and second substrates; a first polarizing layer between the liquid crystal layer and a first surface of the first substrate that faces the liquid crystal layer, or positioned to face a second surface of the first substrate opposite to the first surface of the first substrate; and a second polarizing layer between the liquid crystal layer and a first surface of the second substrate that faces the liquid crystal layer, or positioned to face a second surface of the second substrate opposite to the first surface of the second substrate; wherein at least one of the first and second polarizing layers is either between the first substrate and the liquid crystal layer or between the second substrate and the liquid crystal layer.
    Type: Application
    Filed: February 27, 2019
    Publication date: June 27, 2019
    Inventor: Hwa Sung WOO
  • Publication number: 20190146292
    Abstract: A display device includes a gate line, a data line, a voltage division reference line, two subpixel electrodes, and three transistors (each including a gate connected to the gate line). The first transistor includes a first source (connected to the data line) and a first drain. The second transistor includes a second source (connected to the data line) and a second drain. The second drain extends in a direction. The third transistor includes a semiconductor member, a third source (connected to the voltage division reference line), and a third drain (connected to the second drain). The first subpixel electrode and the second subpixel electrode are respectively connected to the first drain and the second drain. The maximum overlap length of the third drain and the semiconductor member in the direction is unequal to the maximum overlap length of the third source and the semiconductor member in the direction.
    Type: Application
    Filed: May 15, 2018
    Publication date: May 16, 2019
    Inventor: Hwa Sung WOO
  • Patent number: 10254583
    Abstract: A curved display device comprises: a first substrate and a second substrate facing each other and having a curvature; a liquid crystal layer between the first and second substrates; a first polarizing layer between the liquid crystal layer and a first surface of the first substrate that faces the liquid crystal layer, or positioned to face a second surface of the first substrate opposite to the first surface of the first substrate; and a second polarizing layer between the liquid crystal layer and a first surface of the second substrate that faces the liquid crystal layer, or positioned to face a second surface of the second substrate opposite to the first surface of the second substrate; wherein at least one of the first and second polarizing layers is either between the first substrate and the liquid crystal layer or between the second substrate and the liquid crystal layer.
    Type: Grant
    Filed: July 17, 2015
    Date of Patent: April 9, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventor: Hwa Sung Woo
  • Patent number: 10254598
    Abstract: A liquid crystal display including a first substrate; a pixel electrode which includes a first subpixel electrode and a second subpixel electrode disposed adjacent to and spaced apart from the first subpixel electrode on the first substrate; a second substrate facing the first substrate; and a common electrode disposed on the second substrate and defines a first slit thereof and a second slit thereof which is connected to the first slit. The first subpixel electrode defines a first plate-shaped portion overlapping the first slit and a plurality of first branches which extend from the first plate-shaped portion, and the second subpixel electrode defines a second plate-shaped portion overlapping the second slit and a plurality of second branch portions which extend from the second plate-shaped portion. At least one of the first branch portions is connected to at least one of the second branch portions.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: April 9, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventor: Hwa Sung Woo
  • Publication number: 20180095335
    Abstract: A liquid crystal display device is provided. The liquid crystal display device comprises a substrate, a thin-film transistor (TFT) disposed on the substrate, an insulating layer disposed on the TFT, and a pixel electrode disposed on the insulating layer and connected to a drain electrode of the TFT via a contact hole formed in the insulating layer. The pixel electrode includes a stem electrode which extends in a first direction and a second direction that is perpendicular to the first direction, branch electrodes which extend from the stem electrode, and an extension electrode which is disposed to overlap the contact hole and which is connected to the branch electrodes. The extension electrode includes a slit.
    Type: Application
    Filed: August 14, 2017
    Publication date: April 5, 2018
    Inventor: Hwa Sung WOO
  • Patent number: 9897858
    Abstract: A display apparatus includes a first substrate, a second substrate, and a spacer. The first substrate includes pixel areas including first and second pixel areas adjacent to each other and arranged in a matrix form defined by first and second directions substantially perpendicular to each other. The second substrate faces the first substrate. The spacer is disposed on the second substrate to extend toward the first substrate. Each of the pixel areas includes a pixel electrode and a thin film transistor connected to the pixel electrode through a contact hole.
    Type: Grant
    Filed: October 27, 2014
    Date of Patent: February 20, 2018
    Assignee: Samsung Display Co., Ltd
    Inventors: Young Gu Kim, Byung-Chul Kim, Hwa Sung Woo, Baekkyun Jeon, Min-Sik Jung
  • Publication number: 20170299927
    Abstract: A liquid crystal display including a first substrate; a pixel electrode which includes a first subpixel electrode and a second subpixel electrode disposed adjacent to and spaced apart from the first subpixel electrode on the first substrate; a second substrate facing the first substrate; and a common electrode disposed on the second substrate and defines a first slit thereof and a second slit thereof which is connected to the first slit. The first subpixel electrode defines a first plate-shaped portion overlapping the first slit and a plurality of first branches which extend from the first plate-shaped portion, and the second subpixel electrode defines a second plate-shaped portion overlapping the second slit and a plurality of second branch portions which extend from the second plate-shaped portion. At least one of the first branch portions is connected to at least one of the second branch portions.
    Type: Application
    Filed: October 13, 2016
    Publication date: October 19, 2017
    Inventor: Hwa Sung WOO
  • Patent number: 9785000
    Abstract: A liquid crystal display includes a first insulation substrate, a gate line and a data line disposed on the first insulation substrate and insulated from and intersecting each other, a first passivation layer covering the gate line and the data line, a common electrode positioned on the first passivation layer and including a step-removed part, a second passivation layer covering the common electrode, a pixel electrode positioned on the second passivation layer, a second insulation substrate facing the first insulation substrate, and a main column spacer positioned on the second insulation substrate, where the step-removed part is provided by removing the common electrode at a position corresponding to the main column spacer.
    Type: Grant
    Filed: April 3, 2014
    Date of Patent: October 10, 2017
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hwa Sung Woo, Byung-Chul Kim, Young Gu Kim, Min-Sik Jung
  • Patent number: 9734794
    Abstract: A device for driving a liquid crystal display, in which a pixel voltage is reduced by a kickback voltage variable according to grayscales, includes: a signal controller which receives an input image signal corresponding to a grayscale; an image signal corrector which corrects the input image signal and generates a data input signal; and a data driver which supplies a data voltage corresponding to the grayscale based on the data input signal, where the grayscale includes black, white grayscale and intermediate grayscales, the data voltage includes positive and negative voltages, and when a difference between a sum of the positive and negative voltages and a common voltage is defined an offset value, a first offset value corresponding to the black grayscale, a second offset value corresponding to the white grayscale and a third offset value corresponding to the intermediate grayscale satisfy the inequation: |first offset value?second offset value|?50 mV.
    Type: Grant
    Filed: June 4, 2014
    Date of Patent: August 15, 2017
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventor: Hwa Sung Woo
  • Patent number: 9666154
    Abstract: A liquid crystal display includes: a signal controller configured to receive an input image signal corresponding to a gray from the outside, and an image signal corrector configured to correct the input image signal. The image signal corrector is configured to shift a first input image signal value corresponding to a black gray by a first value based on a common voltage, is configured to shift a second input image signal value corresponding to a halftone gray by a second value based on the common voltage, and is configured to shift a third input image signal value corresponding to a white gray by a third value based on the common voltage. The first value and the second value are larger than a kickback voltage of each of the black gray and the halftone gray, and the third value is the same as a kickback voltage of the white gray.
    Type: Grant
    Filed: September 12, 2014
    Date of Patent: May 30, 2017
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jin-Soo Jung, Hwa Sung Woo, Jun Woo Lee, Baek Kyun Jeon
  • Patent number: 9513513
    Abstract: A liquid crystal display according to an exemplary embodiment of the present invention includes: a gate line disposed on a first substrate; a gate insulating layer disposed on the gate line; a semiconductor layer disposed on the gate insulating layer; a data line disposed on the semiconductor layer and including a source electrode; a drain electrode disposed on the semiconductor layer and facing the source electrode via the semiconductor layer interposed therebetween; a passivation layer disposed on the data line and the drain electrode; a pixel electrode disposed on the passivation layer and connected to the drain electrode; a first alignment pattern layer disposed on the pixel electrode; and a first alignment layer disposed on the pixel electrode and the first alignment pattern layer and made of a photoalignment material, wherein the first alignment pattern layer includes a plurality of first alignment patterns separated with a predetermined interval, and the first alignment layer has a concave-convex shape
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: December 6, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Bong Sung Seo, Hwa Sung Woo, Baek Kyun Jeon
  • Patent number: 9472581
    Abstract: A display device according to an exemplary embodiment of the present invention includes: a first insulation substrate; a thin film transistor disposed on the first insulation substrate; a pixel electrode coupled to the thin film transistor; a second insulation substrate facing the first insulation substrate; and a common electrode disposed on the second insulation substrate. The pixel electrode includes a first subpixel electrode that includes a first horizontal stem portion by which two different regions where arrangements of liquid crystal molecules are respectively different are divided, and a second subpixel electrode that includes a second horizontal stem portion by which two regions where the arrangements of the liquid crystal molecules are respectively different are divided and a cross-shaped stem portion by which four regions where the arrangements of the liquid crystal molecules are respectively different are divided.
    Type: Grant
    Filed: April 17, 2015
    Date of Patent: October 18, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hwa Sung Woo, Yun Seok Lee
  • Patent number: 9411206
    Abstract: A liquid crystal display includes: first and second gate lines disposed on the first substrate and which respectively transmit first and second gate signals; first, second and third data lines disposed on the first substrate; a first switching element connected to the first gate line and the first data line; a second switching element connected to the first gate line and the second data line; a third switching element connected to the second gate line and the second data line; a fourth switching element connected to the second gate line and the third data line; first and second pixel electrodes respectively connected to the first and second switching and which form a first liquid crystal capacitor; and third and fourth pixel electrodes respectively connected to the third and fourth switching elements and which form a second liquid crystal capacitor.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: August 9, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Sung-Woon Kim, Hee-Seop Kim, Hyang-Yul Kim, Joo-Nyung Jang, Hwa-Sung Woo, Cheol Shin, Dong-Chul Shin
  • Patent number: 9389467
    Abstract: A liquid crystal display includes a first substrate, a second substrate facing the first substrate with a predetermined interval therebetween, a liquid crystal material filled between the first substrate and the second substrate, a column spacer disposed at the second substrate and maintaining the predetermined interval between the first substrate and the second substrate, a passivation layer disposed at the first substrate, a pixel electrode disposed on the passivation layer; and a fixing protrusion which is disposed on the first substrate, is positioned at an opposing surface of the column spacer and includes at least one of a lower layer including the passivation layer and an upper layer including the pixel electrode.
    Type: Grant
    Filed: June 18, 2014
    Date of Patent: July 12, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Min-Sik Jung, Byung-Chul Kim, Young Gu Kim, Hwa Sung Woo, Baek Kyun Jeon
  • Patent number: 9348188
    Abstract: A liquid crystal display according to an embodiment of the present invention includes: first and second substrates opposed to each other; a liquid crystal layer including liquid crystal molecules interposed between the first and second substrates; a gate line formed on the first substrate and transmitting a gate signal; first and second data lines formed on the first substrate and transmitting first and second data voltages having different polarities; a first switching element connected to the gate line and the first data line; a second switching element connected to the gate line and the second data line; and first and second pixel electrodes that are connected to the first and second switching elements, respectively, and separated from each other, wherein the liquid crystal layer has positive dielectric anisotropy.
    Type: Grant
    Filed: May 8, 2014
    Date of Patent: May 24, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yong-Hwan Shin, Hwa-Sung Woo, Kwang-Chul Jung, Chong-Chul Chai, Mee-Hye Jung
  • Publication number: 20160131945
    Abstract: A curved display device comprises: a first substrate and a second substrate facing each other and having a curvature; a liquid crystal layer between the first and second substrates; a first polarizing layer between the liquid crystal layer and a first surface of the first substrate that faces the liquid crystal layer, or positioned to face a second surface of the first substrate opposite to the first surface of the first substrate; and a second polarizing layer between the liquid crystal layer and a first surface of the second substrate that faces the liquid crystal layer, or positioned to face a second surface of the second substrate opposite to the first surface of the second substrate; wherein at least one of the first and second polarizing layers is either between the first substrate and the liquid crystal layer or between the second substrate and the liquid crystal layer.
    Type: Application
    Filed: July 17, 2015
    Publication date: May 12, 2016
    Inventor: Hwa Sung WOO
  • Publication number: 20160104722
    Abstract: A display device according to an exemplary embodiment of the present invention includes: a first insulation substrate; a thin film transistor disposed on the first insulation substrate; a pixel electrode coupled to the thin film transistor; a second insulation substrate facing the first insulation substrate; and a common electrode disposed on the second insulation substrate. The pixel electrode includes a first subpixel electrode that includes a first horizontal stem portion by which two different regions where arrangements of liquid crystal molecules are respectively different are divided, and a second subpixel electrode that includes a second horizontal stem portion by which two regions where the arrangements of the liquid crystal molecules are respectively different are divided and a cross-shaped stem portion by which four regions where the arrangements of the liquid crystal molecules are respectively different are divided.
    Type: Application
    Filed: April 17, 2015
    Publication date: April 14, 2016
    Inventors: Hwa Sung WOO, Yun Seok LEE
  • Publication number: 20160048068
    Abstract: A liquid crystal display includes: first and second gate lines disposed on the first substrate and which respectively transmit first and second gate signals; first, second and third data lines disposed on the first substrate; a first switching element connected to the first gate line and the first data line; a second switching element connected to the first gate line and the second data line; a third switching element connected to the second gate line and the second data line; a fourth switching element connected to the second gate line and the third data line; first and second pixel electrodes respectively connected to the first and second switching and which form a first liquid crystal capacitor; and third and fourth pixel electrodes respectively connected to the third and fourth switching elements and which form a second liquid crystal capacitor.
    Type: Application
    Filed: October 22, 2015
    Publication date: February 18, 2016
    Inventors: Sung-Woon KIM, Hee-Seop KIM, Hyang-Yul KIM, Joo-Nyung JANG, Hwa-Sung WOO, Cheol SHIN, Dong-Chul SHIN
  • Publication number: 20160018685
    Abstract: A liquid crystal display according to an exemplary embodiment of the present invention includes: a gate line disposed on a first substrate; a gate insulating layer disposed on the gate line; a semiconductor layer disposed on the gate insulating layer; a data line disposed on the semiconductor layer and including a source electrode; a drain electrode disposed on the semiconductor layer and facing the source electrode via the semiconductor layer interposed therebetween; a passivation layer disposed on the data line and the drain electrode; a pixel electrode disposed on the passivation layer and connected to the drain electrode; a first alignment pattern layer disposed on the pixel electrode; and a first alignment layer disposed on the pixel electrode and the first alignment pattern layer and made of a photoalignment material, wherein the first alignment pattern layer includes a plurality of first alignment patterns separated with a predetermined interval, and the first alignment layer has a concave-convex shape
    Type: Application
    Filed: February 6, 2015
    Publication date: January 21, 2016
    Inventors: Bong Sung SEO, Hwa Sung WOO, Baek Kyun JEON
  • Patent number: 9195107
    Abstract: A liquid crystal display includes: first and second gate lines disposed on the first substrate and which respectively transmit first and second gate signals; first, second and third data lines disposed on the first substrate; a first switching element connected to the first gate line and the first data line; a second switching element connected to the first gate line and the second data line; a third switching element connected to the second gate line and the second data line; a fourth switching element connected to the second gate line and the third data line; first and second pixel electrodes respectively connected to the first and second switching and which form a first liquid crystal capacitor; and third and fourth pixel electrodes respectively connected to the third and fourth switching elements and which form a second liquid crystal capacitor.
    Type: Grant
    Filed: September 8, 2014
    Date of Patent: November 24, 2015
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Sung-Woon Kim, Hee-Seop Kim, Hyang-Yul Kim, Joo-Nyung Jang, Hwa-Sung Woo, Cheol Shin, Dong-Chul Shin