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).

  • Patent number: 8749476
    Abstract: A electrophoretic display device is provided, which includes: a thin film transistor array panel including a substrate, gate and data lines formed on the substrate and crossing each other, switching thin film transistors electrically connected to the gate and data lines, a photo sensor formed on the substrate, and pixel electrodes electrically connected to the switching thin film transistors; a common electrode panel facing the thin film transistor array panel and having a common electrode; and a display layer disposed between the thin film transistor array panel and the common electrode panel. The display layer includes micro capsules containing negative and positive pigment particles.
    Type: Grant
    Filed: May 31, 2005
    Date of Patent: June 10, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Nam-Seok Roh, Mun-Pyo Hong
  • Patent number: 8729551
    Abstract: A flat panel display includes; a first substrate, a white reflective layer disposed on the first substrate, a pixel electrode disposed on the white reflective, a second substrate disposed facing the first substrate, a common electrode disposed on the second substrate, and an electrooptic layer disposed between the pixel electrode and the common electrode, wherein the white reflective layer includes at least one of TiO2 and BaSO4.
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: May 20, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Nam-Seok Roh, Jung-Woo Park, Dae-Jin Park, Yu-Jin Kim, Joo-Han Bae, Tae-Hyung Hwang, Seok-Joon Hong
  • Patent number: 8658399
    Abstract: Disclosed herein is a novel gluconacetobacter strain having cellulose producing activity. Specifically, the present invention relates to a novel gluconacetobacter strain producing nano-structured cellulose in a highly efficient manner. The cellulose produced by the strain, due to its superb thermodynamic properties, can be characterized as nano-structured bacterial cellulose and therefore utilized as a bio-nano-fiber. Particularly, the cellulose can be impregnated with a resin to form a cellulose-based resin which can be effectively adapted for a substrate for a liquid crystal display (LCD).
    Type: Grant
    Filed: October 29, 2012
    Date of Patent: February 25, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jong-Seong Kim, Woo-jae Lee, Nam-Seok Roh, Sang-Il Kim, Min-Ho Yoon, Young Tak Song, Tae Jin Kang, Suk Heung Oh, Seung-Jae Lee, Hye Jin Kim, Jin Ju Yu, Dong Hyun Yu, Young Sik Yoon, Jong Hwan Lee
  • Publication number: 20130302925
    Abstract: A thin film transistor substrate for a liquid crystal display device includes a substrate, a metal layer on the substrate, and an aluminum complex oxide layer on the metal layer. The aluminum complex oxide layer comprises at least one selected from the group consisting of zirconium, tungsten, chromium and molybdenum. A passivation layer is formed on the aluminum complex oxide layer through a dipping process.
    Type: Application
    Filed: July 17, 2013
    Publication date: November 14, 2013
    Applicant: Samsung Display Co., Ltd.
    Inventors: Jong-Hyun SEO, Mun-Pyo HONG, Nam-Seok ROH
  • Publication number: 20130293799
    Abstract: A display device includes: a substrate including a plurality of pixel areas; a thin film transistor on the substrate; a pixel electrode connected to the thin film transistor; an roof layer connected between pixel areas adjacent in a first direction and separated from the pixel electrode; a column protruded from the roof layer in a boundary portion of the pixel areas; a space between the pixel electrode and the roof layer, the roof layer partially overlapping an upper inner wall and a first side inner wall of the space and exposing a second side inner wall of the space; a liquid crystal in the space.
    Type: Application
    Filed: November 17, 2012
    Publication date: November 7, 2013
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Seon Uk LEE, Yeun Tae KIM, Seong Gyu KWON, Nam Seok ROH
  • Publication number: 20130293798
    Abstract: A display device includes a substrate including a pixel area, a thin-film transistor formed on the substrate, a pixel electrode connected to the thin-film transistor, a common electrode formed on the pixel electrode, a space formed between the pixel electrode and the common electrode, and a roof layer formed on the common electrode. The common electrode and the roof layer include a protrusion protruding from at least one of an upper edge and a lower edge of the pixel area.
    Type: Application
    Filed: November 6, 2012
    Publication date: November 7, 2013
    Applicant: Samsung Display Co., Ltd.
    Inventors: Hee Keun Lee, Yeun Tae Kim, Nam Seok Roh, Hae Ju Yun
  • Patent number: 8547507
    Abstract: A reflective liquid crystal display (LCD) is provided for efficiently preventing white coordinates from being yellowish. The LCD includes a substrate having red color filters, green color filters, and blue color filters. The blue color filters have an overall area smaller than that of the red color filters and the green color filters while blocking green light better than the red color filters and blocking red light better than the green color filters.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: October 1, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Nam-seok Roh, Soo-guy Rho
  • Patent number: 8542428
    Abstract: An electrophoretic display device according to an exemplary embodiment of the present invention includes: a lower substrate; an upper substrate; a thin film transistor disposed on the lower substrate; a pixel electrode connected to the thin film transistor; an electronic ink layer positioned between the lower substrate and the upper substrate; a plurality of partitions disposed on the upper substrate; a reflecting layer disposed on the partitions; a color filter disposed between the partitions.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: September 24, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ju-Han Bae, Byeong-Jin Lee, Nam-Seok Roh, Myung-Hwan Kim, Sang-Il Kim, Tae-Hyung Hwang, Son-Uk Lee, Yu Jin Kim
  • Patent number: 8513677
    Abstract: A thin film transistor substrate for a liquid crystal display device includes a substrate, a metal layer on the substrate, and an aluminum complex oxide layer on the metal layer. The aluminum complex oxide layer comprises at least one selected from the group consisting of zirconium, tungsten, chromium and molybdenum. A passivation layer is formed on the aluminum complex oxide layer through a dipping process.
    Type: Grant
    Filed: March 16, 2006
    Date of Patent: August 20, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jong-Hyun Seo, Mun-Pyo Hong, Nam-Seok Roh
  • Patent number: 8502793
    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: Grant
    Filed: February 10, 2011
    Date of Patent: August 6, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Soo-Wan Yoon, Cheol-Woo Park, Sung-Jin Kim, Nam-Seok Roh, Sang-Il Kim, Woo-Jae Lee, Chong-Chul Chai
  • Patent number: 8422115
    Abstract: A display device is provided. The display device includes: a substrate including a unit display area, a fixing member that is formed on the substrate and that is electrically isolated, an insulating layer that is formed on the fixing member, a fixing electrode that is formed on the insulating layer and that is electrically connected to a power source, and a plurality of moving members with one end fixed to the insulating layer and positioned apart by a distance from the fixing electrode. The plurality of moving members and the fixing electrode are positioned within the unit display area.
    Type: Grant
    Filed: August 25, 2008
    Date of Patent: April 16, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jae-Hyuk Chang, Seong-Sik Shin, Nam-Seok Roh, Kyung-Ho Lee, Jun-Bo Yoon
  • Publication number: 20130059067
    Abstract: Disclosed herein is a novel gluconacetobacter strain having cellulose producing activity. Specifically, the present invention relates to a novel gluconacetobacter strain producing nano-structured cellulose in a highly efficient manner. The cellulose produced by the strain, due to its superb thermodynamic properties, can be characterized as nano-structured bacterial cellulose and therefore utilized as a bio-nano-fiber. Particularly, the cellulose can be impregnated with a resin to form a cellulose-based resin which can be effectively adapted for a substrate for a liquid crystal display (LCD).
    Type: Application
    Filed: October 29, 2012
    Publication date: March 7, 2013
    Inventors: Jong-Seong KIM, Woo-jae LEE, Nam-Seok ROH, Sang-IL KIM, Min-Ho YOON, Young Tak SONG, Tae Jin KANG, Suk Heung OH, Seung-Jae LEE, Hye Jin KIM, Jin Ju YU, Dong Hyun YU, Young Sik YOON, Jong Hwan LEE
  • Patent number: 8384987
    Abstract: An electrophoretic display (EPD) device and a method of manufacturing the EPD are disclosed. An EPD device includes a first substrate, a second substrate, and an electrophoretic layer. The first substrate includes a plurality of pixel areas, and each pixel area includes a first electrode. The second substrate faces the first substrate and includes a second electrode to form an electric field with the first electrode and a color filter corresponding to the first electrode. The electrophoretic layer is disposed between the first substrate and the second substrate and is controlled by an electric field formed by the first electrode and the second electrode to display an image. An end portion of the color filter extends beyond an end portion of the first electrode.
    Type: Grant
    Filed: November 10, 2008
    Date of Patent: February 26, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Seung-Jin Baek, Nam-Seok Roh, Sang-Il Kim, Woo-Jae Lee, Mi-Jung Han
  • Patent number: 8304215
    Abstract: Disclosed herein is a novel gluconacetobacter strain having cellulose producing activity. Specifically, the present invention relates to a novel gluconacetobacter strain producing nano-structured cellulose in a highly efficient manner. The cellulose produced by the strain, due to its superb thermodynamic properties, can be characterized as nano-structured bacterial cellulose and therefore utilized as a bio-nano-fiber. Particularly, the cellulose can be impregnated with a resin to form a cellulose-based resin which can be effectively adapted for a substrate for a liquid crystal display (LCD).
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: November 6, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jong-Seong Kim, Woo-jae Lee, Nam-Seok Roh, Sang-IL Kim, Min-Ho Yoon, Young Tak Song, Tae Jin Kang, Suk Heung Oh, Seung-Jae Lee, Hye Jin Kim, Jin Ju Yu, Dong Hyun Yu, Young Sik Yoon, Jong Hwan Lee
  • Publication number: 20120218622
    Abstract: An electrophoretic display device according to an exemplary embodiment of the present invention includes: a lower substrate; an upper substrate; a thin film transistor disposed on the lower substrate; a pixel electrode connected to the thin film transistor; an electronic ink layer positioned between the lower substrate and the upper substrate; a plurality of partitions disposed on the upper substrate; a reflecting layer disposed on the partitions; a color filter disposed between the partitions.
    Type: Application
    Filed: July 15, 2011
    Publication date: August 30, 2012
    Inventors: Ju-Han Bae, Byeong-Jin Lee, Nam-Seok Roh, Myung-Hwan Kim, Sang-II Kim, Tae-Hyung Hwang, Son-Uk Lee, Yu Jin Kim
  • Patent number: 8253941
    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: Grant
    Filed: August 31, 2006
    Date of Patent: August 28, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jae-Hyuk Chang, Nam-Seok Roh, Jung-Mok Bae
  • Patent number: 8246894
    Abstract: A flexible substrate, a method of manufacturing a display substrate, and a method of manufacturing a display panel. A spinning device is filled with a source solution, and a carrier substrate is arranged such that the spinning device faces the carrier substrate. An electric field is formed between the spinning device and the carrier substrate by supplying a power to the spinning device and the carrier substrate, and a nano-fiber is formed by spraying the source solution toward the carrier substrate. A flexible substrate is formed on the carrier substrate by coating a polymer resin on the nano-fiber, a plurality of display cells are formed on the flexible substrate, and then a display substrate is formed by separating the carrier substrate from the flexible substrate.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: August 21, 2012
    Assignee: Samsung Electronics, Ltd.
    Inventors: Myung-Hwan Kim, Nam-Seok Roh, Sang-Il Kim, Woo-Jae Lee, Jung-Hun Noh
  • Patent number: 8182633
    Abstract: A method of fabricating a flexible display device. The method includes forming an adhesive layer on a first carrier substrate; laminating a first flexible substrate on the adhesive layer, so that a first separation layer of the first flexible substrate is disposed on the adhesive layer; forming a thin film transistor array on the first flexible substrate; and separating the first carrier substrate from the flexible substrate by directing a laser beam onto the first separation layer. The first separation layer comprises silicon nitride (SiNx) with amounts of nitride A1 and amounts of silicon B1 satisfying 0.18?{A1/B1}?0.90.
    Type: Grant
    Filed: May 3, 2010
    Date of Patent: May 22, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Min-Ho Yoon, Nam-Seok Roh, Myung-Hwan Kim, Sang-Il Kim, Woo-Jae Lee, Jong-Seong Kim
  • Patent number: 8144387
    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: Grant
    Filed: May 20, 2010
    Date of Patent: March 27, 2012
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Sang-Il Kim, Nam-Seok Roh, Cheol-Woo Park, Kyu-Young Kim
  • Patent number: RE43574
    Abstract: A liquid crystal display is provided, which includes a liquid crystal panel assembly including a plurality of red, green, blue and white pixel areas, and a backlight unit placed at a side of the liquid crystal panel assembly. The light emitted from the backlight unit has a color coordinate (x, y) where x ranges from about 0.31 to about 0.34, and y ranges from about 0.32 to about 0.35.
    Type: Grant
    Filed: January 18, 2007
    Date of Patent: August 14, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Keun-Kyu Song, Jeong-Ye Choi, Nam-Seok Roh, Mun-Pyo Hong, Cheol-Woo Park