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: 8941793
    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: June 28, 2011
    Date of Patent: January 27, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Kyoung Ju Shin, Hak Sun Chang, Yong Hwan Shin
  • Patent number: 8879033
    Abstract: A liquid crystal display, including a first substrate and a second substrate, each having a plurality of unit pixel areas and facing each other, and a liquid crystal layer between the first substrate and the second substrate, in which the plurality of unit pixel areas each have a plurality of domains. In a first domain of the plurality of domains, a first alignment layer of the first substrate and a second alignment layer of the second substrate are photo-aligned, and in a second domain of the plurality of domains, the second alignment layer of the second substrate is photo-aligned twice and the first alignment layer of the first substrate is not photo-aligned.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: November 4, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yong Hwan Shin, Hak Sun Chang, Min-Sik Jung, Baek Kyun Jeon, Jun Woo Lee
  • Publication number: 20140267994
    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: Application
    Filed: July 3, 2013
    Publication date: September 18, 2014
    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
  • Patent number: 8767149
    Abstract: Provided is a liquid crystal display including a first substrate and a second substrate facing each other, a plurality of pixel electrodes formed on the first substrate and each including a first subpixel electrode and a second subpixel electrode, a common electrode formed on the second substrate, a shielding member formed on the first substrate or the second substrate and overlapping a portion of the first subpixel electrode, an alignment layer formed on at least one of the plurality of pixel electrodes and the common electrode and subjected to photo-alignment, and a liquid crystal layer interposed between the first substrate and the second substrate.
    Type: Grant
    Filed: November 14, 2011
    Date of Patent: July 1, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hak Sun Chang, Yong Hwan Shin, Min-Sik Jung, Kyoung Ju Shin, Jun Woo Lee
  • Publication number: 20140168582
    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: Application
    Filed: September 4, 2013
    Publication date: June 19, 2014
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hak Sun CHANG, Jang Wi RYU, Jae-Soo JANG, Ki Chul SHIN
  • Publication number: 20140132874
    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: Application
    Filed: March 18, 2013
    Publication date: May 15, 2014
    Applicant: Samsung Display Co., Ltd.
    Inventors: Jae-Soo JANG, Hak-Sun Chang, Jang Wi Ryu, Ki Chul Shin
  • Patent number: 8698968
    Abstract: A liquid crystal display includes a first substrate, a gate line, a data line, first-third power lines located on the first substrate, first-third sub-pixels, where a switching element of each is connected to the gate line and the data line, a second substrate, a common electrode that is formed on the second substrate, a liquid crystal layer located between the first and second substrates, and a power voltage driver outputting a low voltage during a first period and a high voltage during a subsequent second period to the first power line, a constant voltage during both periods to the second power line, and the high voltage during the first period and the low voltage during the second period to the third power line. The first power line, the second power line and the third power line overlap the first sub-pixel, the second sub-pixel, and the third sub-pixel, respectively.
    Type: Grant
    Filed: June 15, 2011
    Date of Patent: April 15, 2014
    Assignee: Samsung Display Co. Ltd.
    Inventors: Kyoung Ju Shin, Hak Sun Chang, Kyoung Tae Kim, Jun Woo Lee, Min-Sik Jung
  • Publication number: 20140043571
    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: March 15, 2013
    Publication date: February 13, 2014
    Applicant: Samsung Display Co., Ltd.
    Inventors: Hak Sun CHANG, Jang Wi RYU, Ki Chui SHIN, Jae-Soo JANG
  • 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: 20130242245
    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: Application
    Filed: December 11, 2012
    Publication date: September 19, 2013
    Applicant: 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: 20130242239
    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: September 13, 2012
    Publication date: September 19, 2013
    Applicant: 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
  • Patent number: 8525965
    Abstract: A unit pixel of a liquid crystal display panel includes a plurality of domains formed using a photoalignment process technology. The domains have different domain alignment vectors, and major axes of liquid crystal molecules on alignment layers are aligned in parallel to transmission axes of the liquid crystal display panel. In addition, the unit pixel has a pixel electrode including slits. The slits have a slit angle at which the slits cross alignments of the domains at a predetermined angle, and the slit angle is less than 45°. As a result, transmittance of the unit pixel may increase, ensuring high image quality.
    Type: Grant
    Filed: August 19, 2011
    Date of Patent: September 3, 2013
    Assignee: Samsung Display Co., Ltd
    Inventors: Young-Gu Kim, Jin-Soo Jung, Hak-Sun Chang, Hee-June Kwak
  • Patent number: 8467025
    Abstract: Disclosed is a liquid crystal display capable of high quality image and bright display. Gate signal lines are curved at near switching elements of the liquid crystal display. A pixel area is defined by the gate signal lines and their intersecting data signal lines. Pixel electrodes and common electrodes are disposed along a longitudinal direction of a pixel. A pixel signal and a common signal line is connected to the pixel electrode and the common electrode respectively. A storage capacitor may be formed in the middle of a longitudinal direction of the pixel, or where generally a texture may arise during display. One half of the pixel may be symmetrical with the other half with respect to the storage capacitor. A common signal line may be parallel with the data signal line and be disposed nearer to the data signal line than a pixel signal line. The pixel may be disposed symmetrically with respect to the data signal line therebetween.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: June 18, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Chang-Hun Lee, Eun-Hee Han, Hak-Sun Chang
  • Publication number: 20130141424
    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: Application
    Filed: May 4, 2012
    Publication date: June 6, 2013
    Inventors: Hak Sun Chang, Jang Wi Ryu, Hyo Ju Jung, Gak Seok Lee
  • Publication number: 20130128200
    Abstract: A liquid crystal display, including a first substrate and a second substrate, each having a plurality of unit pixel areas and facing each other, and a liquid crystal layer between the first substrate and the second substrate, in which the plurality of unit pixel areas each have a plurality of domains. In a first domain of the plurality of domains, a first alignment layer of the first substrate and a second alignment layer of the second substrate are photo-aligned, and in a second domain of the plurality of domains, the second alignment layer of the second substrate is photo-aligned twice and the first alignment layer of the first substrate is not photo-aligned.
    Type: Application
    Filed: September 14, 2012
    Publication date: May 23, 2013
    Inventors: Yong Hwan SHIN, Hak Sun Chang, Min-Sik Jung, Baek Kyun Jeon, Jun Woo Lee
  • Patent number: 8427618
    Abstract: Disclosed is a liquid crystal display capable of high quality image and bright display. Gate signal lines are curved at near switching elements of the liquid crystal display. A pixel area is defined by the gate signal lines and their intersecting data signal lines. Pixel electrodes and common electrodes are disposed along a longitudinal direction of a pixel. A pixel signal and a common signal line is connected to the pixel electrode and the common electrode respectively. A storage capacitor may be formed in the middle of a longitudinal direction of the pixel, or where generally a texture may arise during display. One half of the pixel may be symmetrical with the other half with respect to the storage capacitor. A common signal line may be parallel with the data signal line and be disposed nearer to the data signal line than a pixel signal line. The pixel may be disposed symmetrically with respect to the data signal line therebetween.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: April 23, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Chang-Hun Lee, Eun-Hee Han, Hak-Sun Chang
  • Publication number: 20120236238
    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: September 23, 2011
    Publication date: September 20, 2012
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Young-Gu KIM, Jin-Soo JUNG, Hak-Sun CHANG
  • Patent number: 8207923
    Abstract: The disclosure describes a liquid crystal display panel including a plurality of sub-pixels, a plurality of thin film transistors, a plurality of data lines, and a plurality of gate lines. Each of the sub-pixels has first and second gray scale regions which are split up and down and have different areas, first and second gray scale regions of one sub-pixel having a staggered arrangement with respect to those of an adjacent sub-pixel. Thin film transistors are connected to first and second gray scale regions so that first gray scale regions are driven when one of gate lines is driven and the second gray scale regions are driven when another gate line is driven.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: June 26, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kyoung Ju Shin, Hak Sun Chang, Yeon Ju Kim, Seung Hoo Yoo, Hyun Wuk Kim, Hee Wook Do
  • Publication number: 20120154700
    Abstract: A liquid crystal display includes a first substrate, a gate line, a data line, first-third power lines located on the first substrate, first-third sub-pixels, where a switching element of each is connected to the gate line and the data line, a second substrate, a common electrode that is formed on the second substrate, a liquid crystal layer located between the first and second substrates, and a power voltage driver outputting a low voltage during a first period and a high voltage during a subsequent second period to the first power line, a constant voltage during both periods to the second power line, and the high voltage during the first period and the low voltage during the second period to the third power line. The first power line, the second power line and the third power line overlap the first sub-pixel, the second sub-pixel, and the third sub-pixel, respectively.
    Type: Application
    Filed: June 15, 2011
    Publication date: June 21, 2012
    Inventors: Kyoung Ju Shin, Hak Sun Chang, Kyoung Tae Kim, Jun Woo Lee, Min-Sik Jung
  • Publication number: 20120154723
    Abstract: Provided is a liquid crystal display including a first substrate and a second substrate facing each other, a plurality of pixel electrodes formed on the first substrate and each including a first subpixel electrode and a second subpixel electrode, a common electrode formed on the second substrate, a shielding member formed on the first substrate or the second substrate and overlapping a portion of the first subpixel electrode, an alignment layer formed on at least one of the plurality of pixel electrodes and the common electrode and subjected to photo-alignment, and a liquid crystal layer interposed between the first substrate and the second substrate.
    Type: Application
    Filed: November 14, 2011
    Publication date: June 21, 2012
    Inventors: Hak Sun CHANG, Yong Hwan Shin, Min-Sik Jung, Kyoung Ju Shin, Jun Woo Lee