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: 7817124
    Abstract: A liquid crystal display panel includes 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 have first and second gray scale regions which are split up and down and have different areas, the 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 the first and second gray scale regions so that the 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 19, 2006
    Date of Patent: October 19, 2010
    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: 20100118247
    Abstract: A liquid crystal display includes a substrate, a pixel electrode disposed on the substrate and including a first subpixel electrode and a second subpixel electrode, and a common electrode facing the pixel electrode. The first subpixel electrode comprises a first edge, a second edge disposed opposite the first edge, and two first oblique edges substantially parallel to each other, the first oblique edges making an oblique angle with the first edge and the second edge and meeting the first edge. The second subpixel electrode comprises a first edge, a second edge disposed opposite the first edge, and two first oblique edges substantially parallel to or substantially perpendicular to the first oblique edges of the first subpixel electrode, the first oblique edges of the second subpixel electrode meeting the first edge of the second subpixel electrode.
    Type: Application
    Filed: January 18, 2010
    Publication date: May 13, 2010
    Inventors: Hyun-Wuk Kim, Kyoung-Ju Shin, Hak-Sun Chang, Seung-Hoo Yoo, Hee-Wook Do, Yoon-Sung Um, Mee-Hye Jung
  • Publication number: 20100097556
    Abstract: A display panel is provided. The display panel includes a substrate and a pixel electrode disposed on the substrate and having a pair of first primary edges facing each other and a pair of second primary edges connected to the first primary edges and facing each other, wherein the second primary edges include a plurality of protrusions of the pixel electrode having the shape of sawteeth.
    Type: Application
    Filed: December 3, 2009
    Publication date: April 22, 2010
    Inventors: Hee-Wook DO, Yeon-Ju Kim, Yoon-Sung Um, Hak-Sun Chang, Seung-Hoo Yoo, Hyun-Wuk Kim, Jae-Jin Lyu, Chang-Hun Lee
  • Patent number: 7697096
    Abstract: A liquid crystal display is provided, which includes: a substrate; a field-generating electrode formed on the substrate; and a slope member formed on the substrate and having an inclination angle smaller than about 45 degrees.
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: April 13, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Nak-Cho Choi, Jae-Jin Lyu, Chang-Hun Lee, Dong-Ki Lee, Hak-Sun Chang, Soo-Jin Kim, Hee-Wook Do, Jiangang Lu, Ji-Won Sohn, Mee-Hye Jung, Il-Kook Huh
  • Publication number: 20100060828
    Abstract: A TFT array panel on which both pixel electrodes and common electrodes are formed and a color filter panel is disposed opposing the array panel, and liquid crystals are interposed therebetween. The liquid crystals are aligned parallel to the two panels and driven by parallel electric field formed between the pixel electrodes and reference electrodes. Polarization films are arranged outsides the two panels, and a quasi-A plate compensation film is arranged between the color filter panel and the polarization film.
    Type: Application
    Filed: August 28, 2009
    Publication date: March 11, 2010
    Inventors: Hak-Sun Chang, Eun-Hee Han, Chang-Hung Lee, Seon-Hong Ahn
  • Publication number: 20100039599
    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: Application
    Filed: September 25, 2009
    Publication date: February 18, 2010
    Inventors: Chang-Hun LEE, Eun-Hee HAN, Hak-Sun CHANG
  • Publication number: 20100025689
    Abstract: A thin film transistor array panel according to an embodiment includes: a substrate; a plurality of gate line formed on the substrate; a plurality of first capacitor electrodes formed on the substrate and separated from the gate lines; a plurality of data line intersecting the gate lines; a plurality of thin film transistor connected to the gate lines and the data lines; a plurality of second capacitor electrodes disposed on the first electrode; a plurality of interconnections connected to the second capacitor electrodes and the thin film transistor and disposed symmetrical to the data lines; and a plurality of pixel electrode, each pixel electrode including a first subpixel electrode connected to one of the thin film transistors and a second subpixel electrode connected to one of the first capacitor electrodes.
    Type: Application
    Filed: October 1, 2009
    Publication date: February 4, 2010
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Chang-Hun LEE, Hyun-Wuk KIM, Mee-Hye JUNG, Kyoung-Ju SHIN, Hak-Sun CHANG, Yoon-Sung UM
  • Patent number: 7656466
    Abstract: A substrate for an LCD panel includes an insulation substrate, a light-blocking layer, a color filter layer, a common electrode layer and a static electricity discharging layer. The light-blocking layer is formed on the insulation substrate to define a pixel region. The color filter layer is formed in the pixel region. The common electrode layer is formed on the color filter layer to provide the liquid crystal layer with a common voltage. The static electricity discharging layer discharges static electricity that is induced by an external stimulus to be captured within the substrate. Thus, when the static electricity induced by the external stimulus flows into the LCD panel, the static electricity may be discharged through the static electricity discharging layer, thereby preventing a spot due to the static electricity.
    Type: Grant
    Filed: December 14, 2005
    Date of Patent: February 2, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hee-Wook Do, Chang-Hun Lee, Hak-Sun Chang, Jae-Jin Lyu, Hyun-Wuk Kim
  • Patent number: 7656487
    Abstract: A liquid crystal display includes a substrate, a pixel electrode disposed on the substrate and including a first subpixel electrode and a second subpixel electrode, and a common electrode facing the pixel electrode. The first subpixel electrode comprises a first edge, a second edge disposed opposite the first edge, and two first oblique edges substantially parallel to each other, the first oblique edges making an oblique angle with the first edge and the second edge and meeting the first edge. The second subpixel electrode comprises a first edge, a second edge disposed opposite the first edge, and two first oblique edges substantially parallel to or substantially perpendicular to the first oblique edges of the first subpixel electrode, the first oblique edges of the second subpixel electrode meeting the first edge of the second subpixel electrode.
    Type: Grant
    Filed: June 29, 2006
    Date of Patent: February 2, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyun-Wuk Kim, Kyoung-Ju Shin, Hak-Sun Chang, Seung-Hoo Yoo, Hee-Wook Do, Yoon-Sung Um, Mee-Hye Jung
  • Patent number: 7639333
    Abstract: A display panel is provided. The display panel includes a substrate and a pixel electrode disposed on the substrate and having a pair of first primary edges facing each other and a pair of second primary edges connected to the first primary edges and facing each other, wherein the second primary edges include a plurality of protrusions of the pixel electrode having the shape of sawteeth.
    Type: Grant
    Filed: April 5, 2006
    Date of Patent: December 29, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hee-Wook Do, Yeon-Ju Kim, Yoon-Sung Um, Hak-Sun Chang, Seung-Hoo Yoo, Hyun-Wuk Kim, Jae-Jin Lyu, Chang-Hun Lee
  • Patent number: 7639313
    Abstract: An array substrate includes a switching device, a pixel electrode, an alignment layer and a storage electrode part. The switching device is formed in a pixel area defined by gate lines and data lines. The pixel electrode is formed in the pixel area and electrically connected to the switching device. The alignment layer is formed on the pixel electrode and rubbed in a predetermined alignment direction. The storage electrode part is formed in an area adjacent to the switching device. The storage electrode part includes at least one side having an angle of about forty degrees to about fifty degrees with respect to the alignment direction. The array substrate improves display quality of the liquid crystal display panel.
    Type: Grant
    Filed: October 18, 2005
    Date of Patent: December 29, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chang-Hun Lee, Hak-Sun Chang, So-Youn Park
  • Patent number: 7619694
    Abstract: A thin film transistor array panel according to an embodiment includes: a substrate; a plurality of gate line formed on the substrate; a plurality of first capacitor electrodes formed on the substrate and separated from the gate lines; a plurality of data line intersecting the gate lines; a plurality of thin film transistor connected to the gate lines and the data lines; a plurality of second capacitor electrodes disposed on the first electrode; a plurality of interconnections connected to the second capacitor electrodes and the thin film transistor and disposed symmetrical to the data lines; and a plurality of pixel electrode, each pixel electrode including a first subpixel electrode connected to one of the thin film transistors and a second subpixel electrode connected to one of the first capacitor electrodes.
    Type: Grant
    Filed: October 6, 2005
    Date of Patent: November 17, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chang-Hun Lee, Hyun-Wuk Kim, Mee-Hye Jung, Kyoung-Ju Shin, Hak-Sun Chang, Yoon-Sung Um
  • Patent number: 7609351
    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: December 11, 2007
    Date of Patent: October 27, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chang-Hun Lee, Eun-Hee Han, Hak-Sun Chang
  • Patent number: 7605884
    Abstract: A TFT array panel on which both pixel electrodes and common electrodes are formed and a color filter panel is disposed opposing the array panel, and liquid crystals are interposed therebetween. The liquid crystals are aligned parallel to the two panels and driven by parallel electric field formed between the pixel electrodes and reference electrodes. Polarization films are arranged outsides the two panels, and a quasi-A plate compensation film is arranged between the color filter panel and the polarization film.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: October 20, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hak-Sun Chang, Eun-Hee Han, Chang-Hun Lee, Seon-Hong Ahn
  • Publication number: 20090174836
    Abstract: A liquid crystal display includes: a substrate; a pixel electrode disposed on the substrate and having a first subpixel electrode and a second subpixel electrode; and a common electrode facing the pixel electrode, wherein the first subpixel electrode has a pair of bent edges substantially parallel to each other, the second subpixel electrode has a pair of bent edges substantially parallel to each other, and the second subpixel electrode has a height greater than a height of the first subpixel electrode.
    Type: Application
    Filed: February 24, 2009
    Publication date: July 9, 2009
    Inventors: Seung-Hoo Yoo, Jong-Ho Son, Hee-Wook Do, Hyun-Wuk Kim, Hak-Sun Chang, Yoon-Sung Um
  • Patent number: 7532294
    Abstract: A display apparatus comprises a plurality of pixel areas, each defined by gate lines and data lines, wherein the data lines are arranged with the gate lines forming an angular relationship with the data lines, and a plurality of pixel electrodes formed in the pixel areas and configured to be essentially parallel with the arrangement of the gate lines.
    Type: Grant
    Filed: January 12, 2006
    Date of Patent: May 12, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyun-Wuk Kim, Chang-Hun Lee, Hak-Sun Chang, Hee-Wook Do, Jae-Jin Lyu, Yoon-Sung Um
  • Patent number: 7532185
    Abstract: The present invention is directed to an apparatus of driving a liquid crystal display device including a plurality of pixels. The driving apparatus includes a gray voltage generator for generating a plurality of gray voltages, an image signal driver for selecting gray voltages corresponding to color signals and applying the selected gray voltages as image signal voltages to the pixels, and a signal controller for controlling the image signal driver based on the color signals and input control signals for controlling the color signals. At least two successive first gray voltages among the plurality of gray voltages are variable and at least two successive second gray voltages among the plurality of gray voltages are fixed.
    Type: Grant
    Filed: July 30, 2002
    Date of Patent: May 12, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chang-Hun Lee, Young-Chol Yang, Hak-Sun Chang
  • Patent number: 7502089
    Abstract: A liquid crystal display includes: a substrate; a pixel electrode disposed on the substrate and having a first subpixel electrode and a second subpixel electrode; and a common electrode facing the pixel electrode, wherein the first subpixel electrode has a pair of bent edges substantially parallel to each other, the second subpixel electrode has a pair of bent edges substantially parallel to each other, and the second subpixel electrode has a height greater than a height of the first subpixel electrode.
    Type: Grant
    Filed: July 12, 2006
    Date of Patent: March 10, 2009
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Seung-Hoo Yoo, Jong-Ho Son, Hee-Wook Do, Hyun-Wuk Kim, Hak-Sun Chang, Yoon-Sung Um
  • Patent number: 7499129
    Abstract: The invention provides a LCD including an insulating substrate; a plurality of first signal lines formed on the insulating substrate; a plurality of second signal lines crossing and insulated from the first signal lines; a plurality of thin film transistors (TFT) coupled with the first and second signal lines; and a plurality of pixels including a plurality of first sub-pixel electrodes coupled with the TFTs and a plurality of second sub-pixel electrodes capacitively coupled with the first sub-pixel electrodes, wherein the pixels include a red (R) pixel, a green (G) pixel, and a blue (B) pixel and a voltage ratio or an area ratio of the second sub-pixel electrode with respect to the first sub-pixel electrode is different among the R, G, and B pixels to improve a brightness ratio of R, G, and B components at a lateral position.
    Type: Grant
    Filed: August 3, 2005
    Date of Patent: March 3, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yoon-Sung Um, Jong-Ho Son, Dong-Hoon Chung, Jun-Woo Lee, Yong-Hwan Shin, Jae-Jin Lyu, Hak-Sun Chang, Hyun-Wuk Kim, Chang-Hun Lee
  • Patent number: 7495715
    Abstract: A liquid crystal display that includes a substrate; a plurality of gate lines formed on the substrate; a plurality of common electrodes formed on the substrate and made of a transparent material; a plurality of data lines intersecting the gate lines; a plurality of thin film transistors connected to the data lines and the gate lines; and a plurality of pixel electrodes connected to the thin film transistors and overlapping the common electrodes. The pixel electrodes include a first sub-pixel electrode separated by a distance from a second sub-pixel electrode.
    Type: Grant
    Filed: July 6, 2006
    Date of Patent: February 24, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yoon-{umlaut over (S)}ung Um, Jae-Jin Lyu, Hak-Sun Chang, Seung-Hoo Yoo, Hyun-Wuk Kim, Hee-Wook Do, Yeon-Ju Kim