Patents by Inventor Nam-Seok Roh

Nam-Seok Roh 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: 20080291527
    Abstract: An electrophoretic display includes a lower substrate, an upper substrate, a color display layer on the lower substrate, a pixel electrode on the lower substrate, and a common electrode on the lower substrate or the upper substrate. The common electrode does not overlap the pixel electrode, and an electrophoretic active layer having a dispersion medium and electrophoretic particles is arranged between the lower substrate and the upper substrate. The electrophoretic active layer is a single-polarity electrophoretic particle system, and grayscales are generated depending on the number of electrophoretic particles arranged in a portion of the electrophoretic active layer corresponding to the pixel electrode. The position of the electrophoretic particles is controlled by the magnitude of the electric field applied between the pixel electrode and the common electrode.
    Type: Application
    Filed: March 27, 2008
    Publication date: November 27, 2008
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sang-Il KIM, Nam-Seok ROH, Cheol-Woo PARK, Kyu-Young KIM
  • Publication number: 20080286889
    Abstract: A method of manufacturing a liquid crystal display at a reduced cost is presented. The method entails: preparing an insulating substrate; forming a gate line and a data line on the insulating substrate to define a pixel area; forming a thin film transistor at an intersection of the gate line and the data line; forming A passivation layer on the thin film transistor; positioning a mold having a concavo-convex pattern on the organic passivation layer, pressing the mold, and forming the concavo-convex pattern on the surface of the organic passivation layer. A pixel electrode on the organic passivation layer is formed.
    Type: Application
    Filed: July 19, 2006
    Publication date: November 20, 2008
    Inventors: Jae-hyuk Chang, Nam-seok Roh, Mun-pyo Hong, Dae-jin Park
  • Publication number: 20080277664
    Abstract: A display apparatus includes pixel electrodes disposed on a first base substrate, a second base substrate which faces the first base substrate, color pixels disposed on the second base substrate, the color pixels correspond to the pixel electrodes in a one-to-one correspondence, each color pixel partially covers the corresponding pixel electrode, a common electrode disposed on the second base substrate to cover the pixel electrodes and an electrophoretic layer including a plurality of electrophoretic particles, the electrophoretic layer being interposed between the pixel electrodes and the common electrode.
    Type: Application
    Filed: May 7, 2008
    Publication date: November 13, 2008
    Applicant: SAMSUNG ELECTRONICS CO., LTD
    Inventors: Sang-Il KIM, Son-Uk LEE, Nam-Seok ROH, Jeong-Kuk LEE
  • Patent number: 7450190
    Abstract: A liquid crystal display is provided. Red, blue and green pixels are sequentially arranged in a row direction. The red pixels and the green pixels are alternately arranged in a column direction and the blue pixels are arranged in the column direction. Four red and green pixels surrounding adjacent two blue pixels in neighboring two pixel rows face each other. Pixel electrodes and a common electrode have cutouts. A ratio of horizontal to vertical of each pixel is equal to 2:3. In this structure, a PenTile Matrix driving provides high resolution images, and the control of the arrangement of the liquid crystal molecules by the cutouts of the pixel electrode and the common electrode and the common electrode provides wide viewing angle.
    Type: Grant
    Filed: November 5, 2002
    Date of Patent: November 11, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Nam-Seok Roh, Chong-Chul Chae, Kyoung-Ju Shin
  • Publication number: 20080190553
    Abstract: A method of manufacturing an electrophoretic display (“EPD”) device includes preparing a first substrate, forming a sealing line on the first substrate, primarily curing the sealing line, filling a capsule composition within an area of the first substrate, adhering an opposite substrate to the first substrate, and secondarily curing the sealing line.
    Type: Application
    Filed: February 5, 2008
    Publication date: August 14, 2008
    Applicant: SAMSUNG ELECTRONICS CO., LTD
    Inventors: Byeong-Seob BAN, Sung-Sik SHIN, Nam-Seok ROH, Sang-Il KIM, Woo-Jae LEE, Mi-Jung HAN
  • Publication number: 20080176477
    Abstract: A method of manufacturing a display device is provided, which includes: forming a buffer layer on a supporting plate; forming a flexible substrate layer on the supporting plate and the buffer layer; forming at least one thin film on the flexible substrate layer; forming a protective layer covering the at least one thin film; forming a plurality of through-holes to expose the buffer layer; removing the buffer layer by injecting an etchant into the through-holes; removing the protective layer; and separating the flexible substrate layer from the supporting plate. According to the present invention, misalignment of the thin films due to the deformation of the plastic substrate may be prevented such that the production time may be minimized, thereby improving productivity of the display device.
    Type: Application
    Filed: October 31, 2007
    Publication date: July 24, 2008
    Inventors: Tae-Hyung Hwang, Nam-Seok Roh, Myung-Hwan Kim
  • Publication number: 20080157101
    Abstract: A transistor array substrate includes a first substrate including a pixel region and a transistor region. The pixel region includes a pixel electrode, a portion of a disconnected gate line and a portion of a disconnected data line. The transistor region includes first and second gate connecting portions respectively connected to disconnected portions of the gate line, and first and second data connecting portions respectively connected to disconnected portions of the data line. The transistor array substrate also includes a second substrate including a gate line connecting portion connected to the first and second gate connecting portions, a data line connecting portion connecting the first and second data connecting portions, and a transistor connected to the gate line connecting portion, the data line connecting portion and the pixel electrode. The second substrate is attached to the transistor region of the first substrate.
    Type: Application
    Filed: December 13, 2007
    Publication date: July 3, 2008
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Tae-Hyung HWANG, Seong-Sik SHIN, Nam-Seok ROH, Sang-Il KIM
  • Patent number: 7362393
    Abstract: A four color liquid crystal display is provided, which includes: a plurality of first and second dots arranged in a matrix, pixels each of the first dots including three primary color pixels and each of the second dots including two primary color pixels and a white pixel, each pixel including a pixel electrode and a switching element; a plurality of gate lines extending in a row direction for transmitting a gate signal to the switching elements; and a plurality of data lines extending in a column direction for transmitting data signals to the switching elements, wherein the first dots and the second dots are alternately arranged both in a row direction and in a column direction.
    Type: Grant
    Filed: March 24, 2004
    Date of Patent: April 22, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chang-Yeong Kim, Mun-Pyo Hong, Seong-Deok Lee, Nam-Seok Roh
  • Publication number: 20080090404
    Abstract: In a method of fabricating a thin film transistor array substrate for a liquid crystal display, a gate line assembly is formed on a substrate with a chrome-based under-layer and an aluminum alloy-based over-layer while proceeding in the horizontal direction. The gate line assembly has gate lines, and gate electrodes, and gate pads. A gate insulating layer is deposited onto the insulating substrate such that the gate insulating layer covers the gate line assembly. A semiconductor layer and an ohmic contact layer are sequentially formed on the gate insulating layer. A data line assembly is formed on the ohmic contact layer with a chrome-based under-layer and an aluminum alloy-based over-layer. The data line assembly has data lines crossing over the gate lines, source electrodes, drain electrodes, and data pads. A protective layer is deposited onto the substrate, and patterned to thereby form contact holes exposing the drain electrodes, the gate pads, and the data pads.
    Type: Application
    Filed: November 29, 2007
    Publication date: April 17, 2008
    Inventors: Seung-Taek Lim, Mun-Pyo Hong, Nam-Seok Roh, Young-Joo Song, Sang-Ki Kwak, Kwon-Young Choi, Keun-kyu Song
  • Publication number: 20080064129
    Abstract: A method of manufacturing a display substrate comprises forming a thin-film transistor (TFT) on a silicon wafer, transferring the TFT from the silicon wafer onto a base substrate using a stamp unit and forming a pixel electrode electrically connected to the TFT.
    Type: Application
    Filed: September 12, 2007
    Publication date: March 13, 2008
    Inventors: Nam-Seok Roh, Jung-Mok Bae
  • Publication number: 20080062159
    Abstract: An electrophoretic display and a method for driving thereof are disclosed. Some embodiments provide an electrophoretic display comprising: (a) a first electrode; (b) a second electrode; (c) an electrophoretic member between the first and second electrodes, the electrophoretic member comprising: first particles each of which carries a first charge, second particles each of which carries a second charge, and third particles each of which carries a third charge, the first, second and third charges being different from each other; and a dispersion medium for distributing the first, second and third particles. The electrophoretic display comprises circuitry for applying at least six different driving voltages between the first and second electrodes for selectively moving the first, second and third particles relative to at least the first electrode to display different colors. Accordingly, many colors can be represented.
    Type: Application
    Filed: September 10, 2007
    Publication date: March 13, 2008
    Inventors: Nam-Seok Roh, Cheol-Woo Park
  • Publication number: 20080050852
    Abstract: A manufacturing method of a display panel for an LCD includes forming a gate line on a flexible insulation substrate, depositing a gate insulating layer on the gate line, forming a semiconductor layer on the gate insulating layer and forming a data line and a drain electrode on the semiconductor layer and the gate insulating layer. The forming the semiconductor layer may be performed by PECVD at about 100° C. to about 180° C., the gate insulating layer may have a thickness of about 2000 ? to about 5500. The method may further include performing hydrogen plasma treatment on the gate insulating layer after the depositing the gate insulating layer and annealing the substrate having the plurality of thin films after the forming the data line and the drain electrode. The insulation substrate may include PES.
    Type: Application
    Filed: August 15, 2007
    Publication date: February 28, 2008
    Inventors: Tae-Hyung Hwang, Ivan Nikulin, Hyung-Il Jeon, Sang-II Kim, Nam-Seok Roh
  • Publication number: 20080049042
    Abstract: A method of converting image signals for a display device including six-color subpixels is provided, which includes: classifying three-color input image signals into maximum, middle, and minimum; decomposing the classified signals into six-color components; determining a maximum among the six-color components; calculating a scaling factor; and extracting six-color output signals.
    Type: Application
    Filed: November 20, 2004
    Publication date: February 28, 2008
    Inventors: Young-Chol Yang, Seong-Deok Lee, Chang-Yeong Kim, Mun-Pyo Hong, Nam-Seok Roh, Won-Hee Choe, Hyun-Wook Ok, Ho-Young Lee, Du-Sik Park, Keun-Kyu Song
  • Publication number: 20080048989
    Abstract: A touch screen display device includes a common electrode, a base substrate disposed opposite to the common electrode, a display signal line formed on the base substrate, a plurality of pixel electrodes, a touch position sensing part formed between the base substrate and the pixel electrodes, the touch position sensing part sensing a change of electrostatic capacitance formed between the common electrode and the touch position sensing part, and a display layer disposed between the common electrode and the pixel electrodes. The display layer includes a plurality of micro capsules comprising positively charged pigment particles and negatively charged pigment particles.
    Type: Application
    Filed: March 6, 2007
    Publication date: February 28, 2008
    Inventors: Soo-Wan Yoon, Cheol-Woo Park, Sung-Jin Kim, Nam-Seok Roh, Sang-Il Kim, Woo-Jae Lee, Chong-Chul Chai
  • Publication number: 20080030828
    Abstract: A display device includes an upper substrate and a lower substrate. Black matrixes are formed upon the upper substrate and color filters are formed between the black matrixes. Microshutter electrodes are formed upon the lower substrate and are configured to open and close. The display device also includes fixed electrodes formed in a vertical direction between the upper substrate and the lower substrate.
    Type: Application
    Filed: August 6, 2007
    Publication date: February 7, 2008
    Applicants: SAMSUNG ELECTRONICS CO., LTD., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Jae-Hyuk CHANG, Seong-Sik SHIN, Nam-Seok ROH, Jun-Bo YOON, Kyung-Ho LEE
  • Publication number: 20080024432
    Abstract: An electrophoretic display device having improved frontal reflectance includes a first substrate including a first electrode of a transparent material having a first optical pattern, a second substrate opposing the first substrate and including a plurality of second electrodes, a spacer interposed between the first and second substrates to define a space between the first and second substrates, and a image display layer formed in the space formed by the first and second substrates and the spacer to display an image by an electric field generated between the first and second electrodes.
    Type: Application
    Filed: July 26, 2007
    Publication date: January 31, 2008
    Inventors: Woo Jae Lee, Seong Sik Shin, Nam Seok Roh, Keun Kyu Song
  • Publication number: 20080024430
    Abstract: An electrophoretic display device which operates in a reflective display mode and a transmissive display mode adaptive to ambient light comprises a first substrate having a first electrode, a second substrate facing the first substrate and having a second electrode, a pair of spacers interposed between the first and second substrates for defining a cell, an insulation fluid filling the cell, first colored charged particles and second colored charged particles dispersed in the insulation fluid, a backlight unit installed at an exterior side of the second substrate, and a backlight mode driving unit for attracting the first colored charged particles and the second colored charged particles to the spacers in opposite directions, respectively when the backlight unit turns on.
    Type: Application
    Filed: July 24, 2007
    Publication date: January 31, 2008
    Inventor: Nam Seok Roh
  • Publication number: 20080003728
    Abstract: A thin film transistor array panel and a method of manufacturing the same include: forming a gate electrode on an insulating substrate; sequentially forming a gate insulating layer; a semiconductor material layer and an ohmic contact material layer on the gate electrode; forming a first semiconductor layer pattern and a first ohmic contact pattern for covering the gate electrode and a surrounding area of the gate electrode by patterning the semiconductor material layer and the ohmic contact material layer; forming a conductive film on the gate insulating layer and the first ohmic contact pattern; forming a conductive film pattern on a partial area of the first ohmic contact pattern and a data line on the gate insulating layer by patterning the conductive film; forming a second ohmic contact pattern and a second semiconductor layer pattern by sequentially etching the first ohmic contact pattern and the first semiconductor layer pattern exposed by deviating from the conductive film pattern; forming a source ele
    Type: Application
    Filed: January 3, 2007
    Publication date: January 3, 2008
    Applicant: SAMSUNG ELECTRONICS CO., LTD
    Inventors: Tae-Hyung HWANG, Hyung-Il JEON, Nam-Seok ROH, Sang-Il KIM
  • Patent number: 7303987
    Abstract: In a method of fabricating a thin film transistor array substrate for a liquid crystal display, a gate line assembly is formed on a substrate with a chrome-based under-layer and an aluminum alloy-based over-layer while proceeding in the horizontal direction. The gate line assembly has gate lines, and gate electrodes, and gate pads. A gate insulating layer is deposited onto the insulating substrate such that the gate insulating layer covers the gate line assembly. A semiconductor layer and an ohmic contact layer are sequentially formed on the gate insulating layer. A data line assembly is formed on the ohmic contact layer with a chrome-based under-layer and an aluminum alloy-based over-layer. The data line assembly has data lines crossing over the gate lines, source electrodes, drain electrodes, and data pads. A protective layer is deposited onto the substrate, and patterned to thereby form contact holes exposing the drain electrodes, the gate pads, and the data pads.
    Type: Grant
    Filed: April 2, 2002
    Date of Patent: December 4, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seung-Taek Lim, Mun-Pyo Hong, Nam-Seok Roh, Young-Joo Song, Sang-Ki Kwak, Kwon-Young Choi, Keun-Kyu Song
  • Publication number: 20070262936
    Abstract: An apparatus for manufacturing a display panel includes an arriving part in which an unfinished display panel is disposed. The apparatus has at least one light transmitting part, a mold which is positioned on the arriving part and which includes at least one alignment key and a pattern forming part, a mold driver which drives the mold, and an alignment sensor which is positioned under the arriving part and which determines whether the display panel and the mold are erroneously aligned through the light transmitting part. Therefore, it is possible to efficiently and accurately pattern a specific material onto the display panel through an imprint lithography process using a pressing mold.
    Type: Application
    Filed: August 31, 2006
    Publication date: November 15, 2007
    Inventors: Jae-Hyuk Chang, Nam-Seok Roh, Jung-Mok Bae