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: 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
  • Publication number: 20150301376
    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: Application
    Filed: October 27, 2014
    Publication date: October 22, 2015
    Inventors: Young Gu KIM, Byung-Chul KIM, HWA SUNG WOO, BAEKKYUN JEON, Min-Sik JUNG
  • Patent number: 9164329
    Abstract: A liquid crystal display includes first and second substrates facing each other, a liquid crystal layer between the substrates, first and second thin film transistors on the first substrate, and first and second pixel electrodes connected to the first and second thin film transistors, respectively, on the first substrate. A transverse center line bisects the first and second pixel electrodes into upper and lower portions. The first and second pixel electrodes include a plurality of branches which alternate. First and second regions include first and second intervals between adjacent branches of the first and second pixel electrodes, respectively, the first interval being larger then the second interval. At least one of the branches includes a first portion forming a first angle with the transverse center line, and a second portion forming a second angle with the transverse center line different from the first angle.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: October 20, 2015
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Mee Hye Jung, Hwa Sung Woo, Jae-Yong Shin, Se Hyoung Cho
  • Publication number: 20150243229
    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: Application
    Filed: September 12, 2014
    Publication date: August 27, 2015
    Inventors: Jin-Soo Jung, Hwa Sung Woo, Jun Woo Lee, Baek Kyun Jeon
  • Publication number: 20150154930
    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: Application
    Filed: June 4, 2014
    Publication date: June 4, 2015
    Inventor: Hwa Sung WOO
  • Publication number: 20150098041
    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: Application
    Filed: June 18, 2014
    Publication date: April 9, 2015
    Inventors: Min-Sik JUNG, Byung-Chul KIM, Young Gu KIM, Hwa Sung WOO, Baek Kyun JEON
  • Patent number: 8982023
    Abstract: An array substrate includes a first pixel electrode and a second pixel electrode. The first pixel electrode includes first branch electrode portions and second branch electrode portions. The first branch electrode portions are disposed in a first area of a unit pixel area and are substantially parallel to a first side of the unit pixel area. The second branch electrode portions are disposed in a second area of the unit pixel area and are substantially parallel to a second side of the unit pixel area. The second pixel electrode includes third branch electrode portions disposed between the first branch electrode portions and fourth branch electrode portions disposed between the second branch electrode portions.
    Type: Grant
    Filed: February 8, 2010
    Date of Patent: March 17, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Kwang-Chul Jung, Joo-Nyung Jang, Hee-Seop Kim, Chong-Chul Chai, Mee-Hye Jung, Hwa-Sung Woo, Cheol Shin
  • Publication number: 20150070635
    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: Application
    Filed: April 3, 2014
    Publication date: March 12, 2015
    Applicant: Samsung Display Co., Ltd.
    Inventors: Hwa Sung WOO, Byung-Chul KIM, Young Gu KIM, Min-Sik JUNG
  • Patent number: 8964140
    Abstract: A liquid crystal display includes: a first substrate and a second substrate disposed opposite the first substrate; a liquid crystal layer interposed between the first and second substrates and including liquid crystal molecules; a gate line which transmits a gate signal; first and second data lines which respectively transmit first and second data voltages, the first and second data voltages having opposite 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; a first subpixel electrode connected to the first switching element; and a second subpixel electrode connected to the second switching element. The first and second subpixel electrodes overlap portions of the first and second data lines. The first and second subpixel electrodes include first and second branches, respectively, which are alternately arranged between the first and second data lines.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: February 24, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sung-Woon Kim, Hee-Seop Kim, Hyang-Yul Kim, Joo-Nyung Jang, Chong-Chul Chai, Mee-Hye Jung, Hwa-Sung Woo, Cheol Shin, Dong-Chul Shin
  • Publication number: 20140375917
    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: September 8, 2014
    Publication date: December 25, 2014
    Inventors: Sung-Woon KIM, Hee-Seop KIM, Hyang-Yul KIM, Joo-Nyung JANG, Hwa-Sung WOO, Cheol SHIN, Dong-Chul SHIN
  • Patent number: 8842103
    Abstract: A method of driving liquid crystal display panel includes generating a plurality of eye data frames from a received frame of image data. A high data frame having a first liquid crystal rotating attribute and a low data frame having a lesser second liquid crystal rotating attribute are respectively generated from a respective two of the generated plurality of eye data frames. The high data frame and the low data frame are alternatingly used to drive the liquid crystal display panel according to a time division rate such that liquid crystal molecules are subjected to low and higher crystal rotating forces. In one embodiment, each pixel is space-divided into first and second sub areas having different distances between the first and second pixel electrodes, and the high data and the low data are time-divided and displayed on the pixel, enhancing visibility of the resulting image for different viewing angles.
    Type: Grant
    Filed: February 16, 2011
    Date of Patent: September 23, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hwa-Sung Woo, Dong-Gyu Kim, Kye-Hun Lee, Hyang-Yul Kim, Joo-Nyung Jang
  • Patent number: 8830411
    Abstract: In an array substrate and a method of manufacturing the array substrate, an array substrate includes a first switching element, a second switching element, a third switching element and a fourth switching element. The first switching element is electrically connected to a first data line. The second switching element is electrically connected to a second data line adjacent to the first data line. The third switching element is electrically connected to a data power line interposed between the first and second data lines. The fourth switching element is electrically connected to a gate power line receiving a voltage having different polarity from a voltage applied to the data power line. Therefore, light transmittance, opening ratio and display quality are improved.
    Type: Grant
    Filed: May 20, 2009
    Date of Patent: September 9, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hwa-Sung Woo, Joo-Nyung Jang, Cheol Shin, Yoon-Sung Um, Mi-Jeong Song
  • Publication number: 20140247409
    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: Application
    Filed: May 8, 2014
    Publication date: September 4, 2014
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Yong-Hwan SHIN, Hwa-Sung WOO, Kwang-Chul JUNG, Chong-Chul CHAI, Mee-Hye JUNG
  • Patent number: 8797486
    Abstract: A liquid crystal display having enhanced transmittance in which the pixel electrode includes a micro-slit pattern and overlaps a control electrode on the insulation layer so that an effective voltage difference is formed between the pixel electrode and the control electrode to control the directional characteristics of the liquid crystal molecules.
    Type: Grant
    Filed: June 19, 2008
    Date of Patent: August 5, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hwa-Sung Woo, Hee-Seop Kim
  • Patent number: 8760479
    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: January 8, 2009
    Date of Patent: June 24, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yong-Hwan Shin, Hwa-Sung Woo, Kwang-Chul Jung, Chong-Chul Chai, Mee-Hye Jung
  • Patent number: 8643578
    Abstract: A method of driving a display apparatus having first and second data lines includes applying a first data signal (to which a first gamma curve has been applied) and a first inverted data signal (having a phase opposite to a phase of the first data signal) to the first data line and the second data line, respectively, during a first frame interval. The method further includes applying a second data signal (to which a second gamma curve has been applied) and a second inverted data signal (having a phase opposite to a phase of the second data signal) to the first data line and the second data line, respectively, during a second frame interval temporally subsequent to the first frame interval.
    Type: Grant
    Filed: February 11, 2009
    Date of Patent: February 4, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jian Gang Lu, Hwa-Sung Woo