Patents by Inventor Nack-Bong Choi

Nack-Bong Choi 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: 20170069692
    Abstract: An organic light emitting display device realizes slimness, having flexibility, and effectively reducing or preventing visibility of reflected external light, which includes an organic light emitting panel, a first adhesive layer on the organic light emitting panel, a touch electrode array being in contact with the first adhesive layer, a separation layer on the touch electrode array, and a cover film on the separation layer.
    Type: Application
    Filed: September 6, 2016
    Publication date: March 9, 2017
    Inventors: JONG-KYUN LEE, Nack-Bong Choi, Myung-Woo Han
  • Publication number: 20170031389
    Abstract: Disclosed is a flexible display device that includes a backplane substrate having an active area and a non-display area outside the display area, the active area having a plurality of pixels defined with a plurality of gate lines and a plurality of data lines, wherein the backplane substrate is defined with a folding axis with reference to which the display device is folded or bended and a folding area in which a radius of curvature remains substantially the same as a radius of curvature at the folding axis located at a center of the folding area when the display device is folded or bended; a plurality of embedded drivers on the backplane substrate in the non-display area, wherein two of the embedded drivers are spaced apart from each other outside the folding area with the folding area therebetween; and a plurality of link wires between the plurality of embedded drivers and the active area, electrically connecting the plurality of embedded drivers and one of the plurality of gate lines and the plurality of d
    Type: Application
    Filed: July 13, 2016
    Publication date: February 2, 2017
    Inventors: Se-Jong Yoo, Nack-Bong Choi, Seung-Hee Kuk
  • Publication number: 20160072102
    Abstract: A flexible organic electroluminescent device is disclosed which includes: a flexible substrate; a buffer layer entirely formed on the flexible substrate; a thin film transistor formed on the buffer layer and configured to include an active layer; a planarization film formed to cover the thin film transistor; an organic light emitting diode formed on the planarization film and configured to include a first electrode, an organic emission layer and a second electrode; and at least one silicon nitride layer formed above the active layer of the thin film transistor but under the planarization film and patterned into a plurality of island patterns.
    Type: Application
    Filed: November 16, 2015
    Publication date: March 10, 2016
    Applicant: LG Display Co., Ltd.
    Inventor: Nack Bong Choi
  • Patent number: 9274398
    Abstract: An electrophoretic display device includes a switching element on a substrate including a display area having a pixel region and a non-display area at a periphery of the display area, a passivation layer covering the switching element, a pixel electrode on the passivation layer and connected to the switching element, an electrophoresis film on the pixel electrode and including an ink layer and a base film, wherein the ink layer includes a plurality of charged particles, and the base film is formed of polyethylene terephthalate, a common electrode for generating an electric field with the pixel electrode to drive the electrophoresis film, and a color filter layer directly on the electrophoresis film, wherein the color filter layer is formed under temperatures of less than 100 degrees of Celsius.
    Type: Grant
    Filed: January 26, 2015
    Date of Patent: March 1, 2016
    Assignee: LG Display Co., Ltd.
    Inventors: Oh-Nam Kwon, Nack-Bong Choi, Choon-Ho Park, Yu-Sok Lim, Jong-Kwon Lee
  • Patent number: 9219102
    Abstract: A flexible organic electroluminescent device is disclosed which includes: a flexible substrate; a buffer layer entirely formed on the flexible substrate; a thin film transistor formed on the buffer layer and configured to include an active layer; a planarization film formed to cover the thin film transistor; an organic light emitting diode formed on the planarization film and configured to include a first electrode, an organic emission layer and a second electrode; and at least one silicon nitride layer formed above the active layer of the thin film transistor but under the planarization film and patterned into a plurality of island patterns.
    Type: Grant
    Filed: July 29, 2014
    Date of Patent: December 22, 2015
    Assignee: LG Display Co., Ltd.
    Inventor: Nack Bong Choi
  • Publication number: 20150138626
    Abstract: An electrophoretic display device includes a switching element on a substrate including a display area having a pixel region and a non-display area at a periphery of the display area, a passivation layer covering the switching element, a pixel electrode on the passivation layer and connected to the switching element, an electrophoresis film on the pixel electrode and including an ink layer and a base film, wherein the ink layer includes a plurality of charged particles, and the base film is formed of polyethylene terephthalate, a common electrode for generating an electric field with the pixel electrode to drive the electrophoresis film, and a color filter layer directly on the electrophoresis film, wherein the color filter layer is formed under temperatures of less than 100 degrees of Celsius.
    Type: Application
    Filed: January 26, 2015
    Publication date: May 21, 2015
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Oh-Nam KWON, Nack-Bong CHOI, Choon-Ho PARK, Yu-Sok LIM, Jong-Kwon LEE
  • Patent number: 8970942
    Abstract: An electrophoretic display device includes a switching element on a substrate including a display area having a pixel region and a non-display area at a periphery of the display area, a passivation layer covering the switching element, a pixel electrode on the passivation layer and connected to the switching element, an electrophoresis film on the pixel electrode and including an ink layer and a base film, wherein the ink layer includes a plurality of charged particles, and the base film is formed of polyethylene terephthalate, a common electrode for generating an electric field with the pixel electrode to drive the electrophoresis film, and a color filter layer directly on the electrophoresis film, wherein the color filter layer is formed under temperatures of less than 100 degrees of Celsius.
    Type: Grant
    Filed: July 21, 2010
    Date of Patent: March 3, 2015
    Assignee: LG Display Co., Ltd.
    Inventors: Oh-Nam Kwon, Nack-Bong Choi, Choon-Ho Park, Yu-Sok Lim, Jong-Kwon Lee
  • Publication number: 20150034932
    Abstract: A flexible organic electroluminescent device is disclosed which includes: a flexible substrate; a buffer layer entirely formed on the flexible substrate; a thin film transistor formed on the buffer layer and configured to include an active layer; a planarization film formed to cover the thin film transistor; an organic light emitting diode formed on the planarization film and configured to include a first electrode, an organic emission layer and a second electrode; and at least one silicon nitride layer formed above the active layer of the thin film transistor but under the planarization film and patterned into a plurality of island patterns.
    Type: Application
    Filed: July 29, 2014
    Publication date: February 5, 2015
    Applicant: LG Display Co., Ltd.
    Inventor: Nack Bong Choi
  • Patent number: 8877547
    Abstract: Provided is a thin film transistor including a gate electrode on a substrate; a gate insulating layer on the gate electrode; source and drain electrodes including first source and drain layers on the gate insulating layer, respectively, and spaced apart from each other, wherein at lease one of the first source and drain layers includes indium-tin-oxide doped with at least one Group III element; and an organic semiconductor layer on the gate insulating layer and contacting the first source and drain layers.
    Type: Grant
    Filed: May 25, 2011
    Date of Patent: November 4, 2014
    Assignee: LG Display Co., Ltd.
    Inventors: Hyun-Sik Seo, Nack-Bong Choi
  • Patent number: 8767163
    Abstract: A jig for a flexible substrate comprises a glass plate having a concave portion and a plurality of grooves at periphery of the concave portion. The jig further comprises a plurality of fixing elements inserted in the plurality of grooves to fix the flexible substrate to the glass plate.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: July 1, 2014
    Assignee: LG Display Device Co., Ltd.
    Inventors: Hyun-Sik Seo, Seung-Han Paek, Dae-Hyun Nam, Nack-Bong Choi
  • Patent number: 8623162
    Abstract: A fabricating method of a flexible display device includes forming first and second jig substrates that have a first groove and a second groove formed in a lower part of an edge of the first groove; spreading an adhesive over the second groove; fixing first and second flexible substrates to the first groove and the adhesive; fabricating an upper array substrate on the first flexible substrate and a lower array substrate on the second flexible substrate; bonding the upper array substrate to the lower array substrate and injecting a liquid crystal; and peeling the first and second flexible substrates from the first and second jig substrates.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: January 7, 2014
    Assignee: LG Display Co., Ltd.
    Inventors: Hyun Sik Seo, Seung Han Paek, Nack Bong Choi
  • Patent number: 8514340
    Abstract: An array substrate having double-layered metal patterns for use in a liquid crystal display device and a manufacturing method thereof are disclosed in the present invention.
    Type: Grant
    Filed: January 16, 2009
    Date of Patent: August 20, 2013
    Assignee: LG Display Co., Ltd.
    Inventors: Oh-Nam Kwon, Kyoung-Mook Lee, Nack-Bong Choi
  • Patent number: 8208086
    Abstract: Provided are an organic semiconductor structure and a method of manufacturing the same, an organic thin film transistor (OTFT) using the organic semiconductor structure and a method of manufacturing the OTFT, and a display apparatus using the same.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: June 26, 2012
    Assignee: LG Display Co., Ltd.
    Inventors: Nack Bong Choi, Min Joo Kim
  • Publication number: 20120125529
    Abstract: A fabricating method of a flexible display device includes forming first and second jig substrates that have a first groove and a second groove formed in a lower part of an edge of the first groove; spreading an adhesive over the second groove; fixing first and second flexible substrates to the first groove and the adhesive; fabricating an upper array substrate on the first flexible substrate and a lower array substrate on the second flexible substrate; bonding the upper array substrate to the lower array substrate and injecting a liquid crystal; and peeling the first and second flexible substrates from the first and second jig substrates.
    Type: Application
    Filed: January 31, 2012
    Publication date: May 24, 2012
    Inventors: Hyun Sik SEO, Seung Han Paek, Nack Bong Choi
  • Patent number: 8147640
    Abstract: A fabricating method of a flexible display device includes the steps of providing an adhesive layer including a first adhesive material on a first surface of a support film, a second adhesive material on a second surface of the support film such that an adhesive strength of the second adhesive material is lower than an adhesive strength of the first adhesive material, and a third adhesive material encompassing an edge of the second adhesive material such that an adhesive strength of the third adhesive material is higher than the adhesive strength of the second adhesive material; a first passivation film adhered to the first surface of the support film with the first adhesive material therebetween; and a second passivation film adhered to the second surface of the support film with the second adhesive material and the third adhesive material therebetween; peeling the first passivation film from the adhesive layer; adhering a rigid substrate to the first adhesive material; peeling the second passivation film fr
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: April 3, 2012
    Assignee: LG Display Co., Ltd.
    Inventors: Hyun Sik Seo, Seung Han Paek, Nack Bong Choi
  • Patent number: 8129898
    Abstract: A flexible organic electro-luminescence device is adapted to improve its flexibility and to completely and substantially exclude the intrusion of external moisture and/or oxygen. The flexible organic electro-luminescence device includes: a substrate of a thickness of about 0.05 mm˜0.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: March 6, 2012
    Assignee: LG. Display Co. Ltd.
    Inventors: Nack Bong Choi, Juhn Suk Yoo
  • Patent number: 8081265
    Abstract: A liquid crystal display structure is provided. The liquid crystal display structure includes a pixel region and a thin film transistor on the substrate. The thin film transistor is adjacent to the pixel region and includes a gate electrode; a gate insulating layer having a top surface; a source electrode and a drain electrode at the top surface of the gate insulating layer; a semiconductor layer disposed at the top surface of the gate insulating layer, the semiconductor layer between the source electrode and the drain electrode defining a channel region, the semiconductor layer including a small molecule organic semiconductor material; and a first passivation layer covering the channel region, a top surface of the first passivation layer coinciding with or being below a top surface of each of the source electrode and the drain electrode.
    Type: Grant
    Filed: June 3, 2009
    Date of Patent: December 20, 2011
    Assignee: LG Display Co., Ltd.
    Inventors: Hyun-Sik Seo, Seung-Han Paek, Nack-Bong Choi
  • Patent number: 8071422
    Abstract: Disclosed is a display device including a thin film transistor. A method for forming the display device includes forming an organic semiconductor pattern in the presence of a magnetic field or an electric field. Due to the presence of a magnetic field or an electric field, the molecules of the organic semiconductor layer of the thin film transistor are substantially aligned in a predetermined direction.
    Type: Grant
    Filed: June 20, 2006
    Date of Patent: December 6, 2011
    Assignee: LG Display Co., Ltd.
    Inventors: Hyun-Sik Seo, Seung-Han Paek, Kyoung-Mook Lee, Dae-Hyun Nam, Nack-Bong Choi, Sung-Hwan Kim
  • Patent number: 8071974
    Abstract: An organic thin film transistor includes a gate electrode having a first thickness on a substrate; an organic insulating layer on the gate electrode and the substrate, a portion of the organic insulating layer on the substrate having a second thickness, and a portion of the organic insulating layer on the gate electrode having a third thickness of about 2000 ? to 5000 ?; a semiconductor layer on the organic insulating layer; and source and drain electrodes on the organic insulating layer and contacting both side portions of the semiconductor layer.
    Type: Grant
    Filed: June 15, 2005
    Date of Patent: December 6, 2011
    Assignee: LG Display Co. Ltd.
    Inventors: Hyun-Sik Seo, Nack-Bong Choi
  • Publication number: 20110223715
    Abstract: Provided is a thin film transistor including a gate electrode on a substrate; a gate insulating layer on the gate electrode; source and drain electrodes including first source and drain layers on the gate insulating layer, respectively, and spaced apart from each other, wherein at lease one of the first source and drain layers includes indium-tin-oxide doped with at least one Group III element; and an organic semiconductor layer on the gate insulating layer and contacting the first source and drain layers.
    Type: Application
    Filed: May 25, 2011
    Publication date: September 15, 2011
    Inventors: Hyun-Sik SEO, Nack-Bong CHOI