Patents by Inventor Hee-Wook Do

Hee-Wook Do 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: 9466248
    Abstract: A LCD and a method of driving the LCD are provided. The LCD includes first and second gate lines extending in a first direction, a data line insulated from the first gate line and crossing the first gate line, a pixel electrode including first and second sub-pixel electrodes, the pixel electrode being disposed in a pixel having a long side in the first direction, a first thin film transistor (TFT) connected to the first gate line, the data line, and the first sub-pixel electrode, a second TFT connected to the first gate line, the data line, and the second sub-pixel electrode, and a third TFT connected to the second gate line, the second sub-pixel electrode, and a charge-sharing capacitor, the charge-sharing capacitor sharing a data voltage applied to the second sub-pixel electrode.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: October 11, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hye-ran You, Seung-beom Park, Yoon-sung Um, Jin-won Park, Hee-wook Do, Hoon Kim
  • Patent number: 9436034
    Abstract: A display panel includes a first substrate, a second substrate, a liquid crystal layer, a first polarizer, a second polarizer and a viewing angle control layer. The second substrate faces the first substrate. A liquid crystal layer is disposed between the first substrate and the second substrate. A first polarizer is disposed on a lower surface of the first substrate and includes a first polarizing layer and a second polarizing layer stacked on each other. A second polarizer is disposed on an upper surface of the second substrate. A viewing angle control layer is disposed on the first polarizer and is configured to control a viewing angle of a column direction of the display panel.
    Type: Grant
    Filed: September 4, 2013
    Date of Patent: September 6, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Sang-Jae Kim, Boo-Kan Ki, Ji-Hye Kim, Hee-Wook Do, Jae-Won Park, Duck-Jong Suh, Jung-Hun Lee, Hyoung-Joo Lee, Seon-Ah Cho, Hyo-Sung Hong
  • Patent number: 8937697
    Abstract: In the optical plate and a method of manufacturing the optical plate, a display apparatus and a method of manufacturing the display apparatus, an optical plate is formed on a polarizing plate transmitting polarized light of incident light, and includes a phase delaying layer having first and second patterns. The first pattern delays a phase of the polarized light by 3?/4 and the second pattern delays the phase of the polarized light by ?/4. Accordingly, a process of manufacturing the display apparatus may be simplified, and a thickness of the display apparatus may be decreased.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: January 20, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hee-Wook Do, Duck-Jong Suh, Kyeong Hyeon Kim, Jeong-Uk Heo
  • Patent number: 8902392
    Abstract: A TFT array is disclosed that includes a substrate, a gate line, a data line; and a pixel, wherein the pixel comprises a first pixel electrode portion comprising a plurality of spaced apart first electrode lines, the first pixel electrode portion having an associated TFT coupled to the first electrode portion, a second pixel electrode portion comprising a plurality of spaced apart second electrode lines, the second pixel electrode portion capacitively coupled with the first pixel electrode portion, wherein a width of each of the first electrode lines of the first pixel electrode portion is narrower than a width of each of the second electrode lines of the second pixel electrode portion, and an interval between adjacent first electrode lines of the first pixel electrode portion is smaller than an interval between adjacent second electrode lines of the second pixel electrode portion.
    Type: Grant
    Filed: August 24, 2012
    Date of Patent: December 2, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Seon-Ah Cho, Ji-Won Sohn, Hee-Wook Do, Jun-Hee Na
  • Patent number: 8867003
    Abstract: A liquid crystal display device including a first substrate including a pixel electrode, a second substrate facing the first substrate and including a common electrode, and a liquid crystal layer interposed between the first substrate and the second substrate. The first substrate includes a storage capacitive line. The liquid crystal display device further includes a domain forming member that is formed over a first region corresponding to the storage capacitive line and a second region adjacent to the first region. The domain forming member is formed with irregular parts including a first irregular part having an enlarged width, a second irregular part having a reduced width, and an external irregular part, which is closest to the first region of the irregular parts formed in the second region and has an enlarged width.
    Type: Grant
    Filed: November 26, 2007
    Date of Patent: October 21, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Seung-hoo Yoo, Hee-wook Do, Mee-hye Jung, Sung-hoon Yang, Hyun-cheol Moon, Hye-ran You
  • Patent number: 8803777
    Abstract: In a display apparatus having a plurality of pixel parts, each pixel part receives a data signal in response to a present gate signal and charges first and second pixel voltages having the same voltage level. A plurality of voltage controllers includes a level-down part to lower a voltage level of the second pixel voltage using a previous pixel voltage charged in a previous frame in response to a next gate signal and a level-up part to receive the lowered second pixel voltage in response to the next gate signal to boost up a voltage level of the first pixel voltage.
    Type: Grant
    Filed: March 29, 2013
    Date of Patent: August 12, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hee-Wook Do, Seung-Beom Park, Hoon Kim, Hye-Ran You, Jian Gang Lu, Hee-Seop Kim, Young-Chol Yang, Seoung-Hoon Lee
  • Publication number: 20140146273
    Abstract: A display panel includes a first substrate, a second substrate, a liquid crystal layer, a first polarizer, a second polarizer and a viewing angle control layer. The second substrate faces the first substrate. A liquid crystal layer is disposed between the first substrate and the second substrate. A first polarizer is disposed on a lower surface of the first substrate and includes a first polarizing layer and a second polarizing layer stacked on each other. A second polarizer is disposed on an upper surface of the second substrate. A viewing angle control layer is disposed on the first polarizer and is configured to control a viewing angle of a column direction of the display panel.
    Type: Application
    Filed: September 4, 2013
    Publication date: May 29, 2014
    Applicant: Samsung Display Co., Ltd.
    Inventors: SANG-JAE KIM, Boo-Kan Ki, Ji-Hye Kim, Hee-Wook Do, Jae-Won Park, Duck-Jong Suh, Jung-Hun Lee, Hyoung-Joo Lee, Seon-Ah Cho, Hyo-Sung Hong
  • Patent number: 8692964
    Abstract: The present invention relates to compensation films of a vertically-aligned liquid crystal display. Upper and lower compensation films asymmetrically differ in refractive index from each other.
    Type: Grant
    Filed: June 26, 2009
    Date of Patent: April 8, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hee-Wook Do, Ki-Chul Shin, Sung-Min Kang, Seung-Hee Lee, Ji-Hoon Kim
  • Patent number: 8665387
    Abstract: A liquid crystal display includes: first and second substrates; a liquid crystal layer; first and second gate lines; a data line and a voltage supplying line disposed on the first substrate; and a pixel. The pixel includes a first switching element connected to the first gate line and the data line, a second switching element connected to the first gate line and the voltage supplying line, a third switching element connected to the second gate line, a first pixel electrode connected to the first switching element, and a separate second pixel electrode connected to the second switching element. The voltage supplying line is supplied with a first voltage, which has a substantially uniform magnitude.
    Type: Grant
    Filed: October 13, 2010
    Date of Patent: March 4, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Seon-Ah Cho, Hee-Wook Do
  • Patent number: 8629820
    Abstract: A liquid crystal display (“LCD”) includes a plurality of gate lines, a plurality of data lines intersecting the gate lines, a plurality of switching elements connected to the gate lines and the data lines, a plurality of storage electrodes, a plurality of storage electrode lines connected to the storage electrodes, a plurality of pixel electrodes connected to the switching elements and overlapping the storage electrodes, a gate driver generating gate signals having a gate-on voltage and a gate-off voltage to apply to the gate lines, a data driver generating data voltages corresponding to externally applied image signals to apply to the data lines, and a storage electrode driver generating storage electrode signals having a reference voltage, a high voltage larger than the reference voltage, and a low voltage smaller than the reference voltage to apply to the storage electrode lines.
    Type: Grant
    Filed: September 13, 2010
    Date of Patent: January 14, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hee-Wook Do, Ji-Won Sohn, Nak-Cho Choi, Jiangang Lu, Hak-Sun Chang, Chang-Hun Lee
  • Publication number: 20130328850
    Abstract: A LCD and a method of driving the LCD are provided. The LCD includes first and second gate lines extending in a first direction, a data line insulated from the first gate line and crossing the first gate line, a pixel electrode including first and second sub-pixel electrodes, the pixel electrode being disposed in a pixel having a long side in the first direction, a first thin film transistor (TFT) connected to the first gate line, the data line, and the first sub-pixel electrode, a second TFT connected to the first gate line, the data line, and the second sub-pixel electrode, and a third TFT connected to the second gate line, the second sub-pixel electrode, and a charge-sharing capacitor, the charge-sharing capacitor sharing a data voltage applied to the second sub-pixel electrode.
    Type: Application
    Filed: August 14, 2013
    Publication date: December 12, 2013
    Applicant: Samsung Display Co., Ltd.
    Inventors: Hye-ran You, Seung-beom Park, Yoon-sung Um, Jin-won Park, Hee-wook Do, Hoon Kim
  • Patent number: 8582061
    Abstract: An optical film assembly includes a first polarization plate disposed below a liquid crystal layer and having a first absorption axis, a second polarization plate disposed above the liquid crystal layer and having a second absorption axis, an A-plate disposed between the first polarization plate and the second polarization plate, and a negative C-plate disposed between the first polarization plate and the second polarization plate. A thickness-direction phase retardation value of the negative C-plate is equal to or less than a value acquired by subtracting about 75 nanometers from a thickness-direction phase retardation value of the liquid crystal layer and the thickness-direction phase retardation value of the negative C-plate is equal to or greater than a value acquired by subtracting about 275 nanometers from the thickness-direction phase retardation value of the liquid crystal layer.
    Type: Grant
    Filed: December 7, 2009
    Date of Patent: November 12, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hwa-Sung Woo, Seung-Ju Lee, Hee-Wook Do, Jeong-Soo Choi, Hee-Seop Kim, Joo-Seok Yeom, Hyang-Yul Kim, Joo-Nyung Jang, Sung-Woon Kim, Cheol Shin, Dong-Chul Shin
  • Patent number: 8542227
    Abstract: In a display apparatus, pixels are arranged in a matrix defined by gate lines and data lines, and each pixel includes a first sub pixel charged to a first pixel voltage and a second sub pixel charged to a second pixel voltage having a same voltage level as the first pixel voltage. A voltage controller controls a voltage level of the first and second pixel voltages charged in the pixels corresponding to the first through penultimate pixel rows in response to a next gate signal. A dummy voltage controller controls a voltage level of the first and second pixel voltages charged in the pixels corresponding to the last pixel row in response to a dummy gate signal. Where a dummy voltage controller is not included, a black matrix partially covers the efficient display area of the pixels corresponding to the last pixel row.
    Type: Grant
    Filed: January 30, 2008
    Date of Patent: September 24, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hye-Ran You, Hee-Wook Do, Seung-Hoo Yoo, Sung-Min Kang, Hoon Kim, Hyun-Cheol Moon, Ho-Kyoon Kwon
  • Patent number: 8520160
    Abstract: A LCD and a method of driving the LCD are provided. The LCD includes first and second gate lines extending in a first direction, a data line insulated from the first gate line and crossing the first gate line, a pixel electrode including first and second sub-pixel electrodes, the pixel electrode being disposed in a pixel having a long side in the first direction, a first thin film transistor (TFT) connected to the first gate line, the data line, and the first sub-pixel electrode, a second TFT connected to the first gate line, the data line, and the second sub-pixel electrode, and a third TFT connected to the second gate line, the second sub-pixel electrode, and a charge-sharing capacitor, the charge-sharing capacitor sharing a data voltage applied to the second sub-pixel electrode.
    Type: Grant
    Filed: April 6, 2011
    Date of Patent: August 27, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hye-ran You, Seung-beom Park, Yoon-sung Um, Jin-won Park, Hee-wook Do, Hoon Kim
  • Patent number: 8502942
    Abstract: A flat panel display device is provided with an increased viewing angle having good dark versus light imaging contrast. The display device includes a display panel, a first optical unit, and a second optical unit. The display panel includes a liquid crystal layer that is driven in a vertical alignment mode. The first optical unit includes a negative C-plate and a first polarizer having a first absorption axis. The second optical unit includes a biaxial compensation plate having a refractive indices coefficient, (nx?nz)/(nx?ny) of more than 0.45 and less than 0.55, and a second polarizer having a second absorption axis crossing the first absorption axis. The biaxial compensation plate has a refractive indices relationship of nx>nz>ny such that dispersion of polarization states of colored light rays passed through the C-plate and the liquid crystal layer may be minimized and gathered about an extinction point, thereby improving contrast at side viewing angles.
    Type: Grant
    Filed: November 16, 2012
    Date of Patent: August 6, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hee-Wook Do, Ki-Chul Shin, Kwang-Hyun Kim, Ji-Hoon Kim
  • Publication number: 20130009156
    Abstract: A TFT array is disclosed that includes a substrate, a gate line, a data line and a pixel, wherein the pixel comprises a first pixel electrode portion comprising a plurality of spaced apart first electrode lines, the first pixel electrode portion having an associated TFT coupled to the first electrode portion, a second pixel electrode portion comprising a plurality of spaced apart second electrode lines, the second pixel electrode portion capacitively coupled with the first pixel electrode portion, wherein a width of each of the first electrode lines of the first pixel electrode portion is narrower than a width of each of the second electrode lines of the second pixel electrode portion, and an interval between adjacent first electrode lines of the first pixel electrode portion is smaller than an interval between adjacent second electrode lines of the second pixel electrode portion.
    Type: Application
    Filed: August 24, 2012
    Publication date: January 10, 2013
    Inventors: Seon-Ah CHO, Ji-Won SOHN, Hee-Wook DO, Jun-Hee Na
  • Patent number: 8330912
    Abstract: A flat panel display device is provided with an increased viewing angle having good dark versus light imaging contrast. The display device includes a display panel, a first optical unit, and a second optical unit. The display panel includes a liquid crystal layer that is driven in a vertical alignment mode. The first optical unit includes a negative C-plate and a first polarizer having a first absorption axis. The second optical unit includes a biaxial compensation plate having a refractive indices coefficient, (nx?nz)/(nx?ny) of more than 0.45 and less than 0.55, and a second polarizer having a second absorption axis crossing the first absorption axis. The biaxial compensation plate has a refractive indices relationship of nx>nz>ny such that dispersion of polarization states of colored light rays passed through the C-plate and the liquid crystal layer may be minimized and gathered about an extinction point, thereby improving contrast at side viewing angles.
    Type: Grant
    Filed: March 17, 2010
    Date of Patent: December 11, 2012
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hee-Wook Do, Ki-Chul Shin, Kwang-Hyun Kim, Ji-Hoon Kim
  • Publication number: 20120274623
    Abstract: In a display apparatus having a plurality of pixel parts, each pixel part receives a data signal in response to a present gate signal and charges first and second pixel voltages having the same voltage level. A plurality of voltage controllers includes a level-down part to lower a voltage level of the second pixel voltage using a previous pixel voltage charged in a previous frame in response to a next gate signal and a level-up part to receive the lowered second pixel voltage in response to the next gate signal to boost up a voltage level of the first pixel voltage.
    Type: Application
    Filed: July 3, 2012
    Publication date: November 1, 2012
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hee-Wook DO, Seung-Beom PARK, Hoon KIM, Hye-Ran YOU, Jian Gang LU, Hee-Seop KIM, Young-Chol YANG, Seung-Hoon LEE
  • Patent number: 8294856
    Abstract: A display substrate includes a base substrate, a gate line, a first insulation layer, a semiconductor layer, a data line, a switching element, a light-blocking member, a reflective electrode, a second insulation layer and a transmissive electrode. The switching element is defined by a gate electrode, a source electrode and a drain electrode spaced apart from a source electrode. The light-blocking member includes a first light-blocking part disposed in correspondence with an area where the gate line and the data line are disposed, and a second light-blocking part is disposed in a reflective area to include an embossing pattern. The reflective electrode is disposed on the second light-blocking part. The second insulation layer is disposed in a pixel area of the reflective electrode. The transmissive electrode is disposed on the second insulation layer in correspondence with a transmissive area of the pixel area.
    Type: Grant
    Filed: July 2, 2009
    Date of Patent: October 23, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seon-Ah Cho, Hee-Wook Do
  • Patent number: 8264651
    Abstract: A TFT array is disclosed that includes a substrate, a gate line formed on the substrate, the gate line extending in a first direction; a data line insulated from the gate line, the data line extending in a second direction different from the first direction and crossing the gate line; and a pixel, positioned adjacent an intersection of the gate line and the data line, wherein the pixel comprises a first pixel electrode portion comprising a plurality of spaced apart first electrode lines, the first pixel electrode portion having an associated TFT coupled to the first electrode portion, a second pixel electrode portion comprising a plurality of spaced apart second electrode lines, the second pixel electrode portion capacitively coupled with the first pixel electrode portion, wherein a width of each of the first electrode lines of the first pixel electrode portion is narrower than a width of each of the second electrode lines of the second pixel electrode portion, and an interval between adjacent first electrode
    Type: Grant
    Filed: July 30, 2008
    Date of Patent: September 11, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seon-Ah Cho, Ji-Won Sohn, Hee-Wook Do, Jun-Hee Na