Patents by Inventor Yong-Hwan Park

Yong-Hwan Park 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: 20110169010
    Abstract: An organic light emitting diode display device and a method of manufacturing thereof, the device including a substrate, the substrate including a pixel part and a circuit part; a first semiconductor layer and a second semiconductor layer on the pixel part of the substrate; a gate insulating layer on an entire surface of the substrate; gate electrodes on the gate insulating layer, the gate electrodes corresponding to the first semiconductor layer and the second semiconductor layer, respectively; source/drain electrodes insulated from the gate electrodes, the source/drain electrodes being connected to the first and second semiconductor layers, respectively; a first electrode connected to the source/drain electrodes of the first semiconductor layer; an organic layer on the first electrode; a second layer on the organic layer; and a metal catalyst layer under the first semiconductor layer.
    Type: Application
    Filed: November 23, 2010
    Publication date: July 14, 2011
    Inventors: Yong-Hwan Park, Kyu-Sik Cho, Sang-Ho Moon, Byoung-Kwon Choo, Min-Chul Shin, Tae-Hoon Yang, Bo-Kyung Choi, Won-Kyu Lee, Yun-Gyu Lee, Joon-Hoo Choi
  • Publication number: 20110108840
    Abstract: An organic light emitting diode (OLED) display device and a method of fabricating the same are disclosed.
    Type: Application
    Filed: November 8, 2010
    Publication date: May 12, 2011
    Applicant: Samsung Mobile Display Co., Ltd.
    Inventors: Won-Kyu Lee, Kyu-Sik Cho, Tae-Hoon Yang, Byoung-Kwon Choo, Sang-Ho Moon, Bo-Kyung Choi, Yong-Hwan Park, Joon-Hoo Choi, Min-Chul Shin, Yun-Gyu Lee
  • Publication number: 20110095296
    Abstract: A thin film transistor (TFT) and an organic light emitting display device having the same are disclosed. In one embodiment, a TFT includes a gate electrode formed on a substrate. A gate insulating layer is formed on the substrate having the gate electrode. An active layer is formed on the gate insulating layer. A source electrode is formed over the active layer. A drain electrode is formed to substantially surround at least three surfaces of the source electrode on the active layer.
    Type: Application
    Filed: October 22, 2010
    Publication date: April 28, 2011
    Applicant: Samsung Mobile Display Co. Ltd.
    Inventors: Byoung-Kwon Choo, Kyu-Sik Cho, Won-Kyu Lee, Yong-Hwan Park, Sang-Ho Moon, Tae-Hoon Yang, Joon-Hoo Choi, Min-Chul Shin, Bo-Kyung Choi, Yun-Gyu Lee
  • Patent number: 7745828
    Abstract: An organic light emitting device includes a substrate, first and second ohmic contacts formed on the substrate, a driving semiconductor formed on the substrate and the first and second ohmic contacts and including polysilicon, a driving input electrode electrically connected to the first ohmic contact, a driving output electrode electrically connected to the second ohmic contact, a first gate insulating layer formed on the driving semiconductor, the driving input electrode, and the driving output electrode, and a driving control electrode formed on the first gate insulating layer and overlapping the driving semiconductor.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: June 29, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Byoung-Seong Jeong, Kyu-Sik Cho, Joon-Hoo Choi, Yong-Hwan Park
  • Publication number: 20100117531
    Abstract: The present invention relates to an organic light emitting device and a manufacturing method thereof. An organic light emitting device includes a first substrate, a thin film structure disposed on the first substrate, a second substrate comprising an inner surface and an outer surface, a first sealing member disposed between the first substrate and the second substrate, the first sealing member comprising an inner surface and an outer surface, and a second sealing member disposed on the outer surface of the second substrate.
    Type: Application
    Filed: April 3, 2009
    Publication date: May 13, 2010
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Seung-Kyu Park, Joon-Hoo Choi, Kyu-Sik Cho, Byoung-Kwon Choo, Yong-Hwan Park, Sang-Ho Moon
  • Publication number: 20100096638
    Abstract: A thin film transistor substrate that includes a substrate, first and second gate electrodes that are formed on the substrate, a gate insulating layer that is formed on the first and second gate electrodes, a first semiconductor and a second semiconductor that are formed on the gate insulating layer, and that overlap the first gate electrode and the second gate electrode, respectively, a first source electrode and a first drain electrode that are formed on the first semiconductor, and positioned opposed to and spaced from each other, a source electrode connected to the first drain electrode and a second drain electrode positioned opposed to and spaced from the second source electrode, wherein the second source and second drain electrodes are formed on the second semiconductor, and a pixel electrode that is electrically connected to the second drain electrode, a method of manufacturing the same, and a display apparatus having the same.
    Type: Application
    Filed: May 14, 2009
    Publication date: April 22, 2010
    Inventors: Byoung Kwon Choo, Joon Hoo Choi, Kyu-Sik Cho, Seung-Kyu Park, Yong-Hwan Park, Sang-Ho Moon
  • Publication number: 20100090208
    Abstract: In a method of manufacturing a thin film transistor substrate, a semiconductor pattern is formed on a substrate, a first etch stop layer and a second etch stop layer are sequentially formed on the semiconductor pattern, and the second etch stop layer and the first etch stop layer are sequentially patterned to form a second etch stop pattern and a first etch stop pattern. Thus, when the second etch stop layer is patterned using an etchant, the first etch stop layer covers the semiconductor pattern, thereby preventing the semiconductor pattern from being etched by the etchant.
    Type: Application
    Filed: September 4, 2009
    Publication date: April 15, 2010
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Sang-Ho MOON, Joon-Hoo Choi, Kyu-Sik Cho, Byoung-Seong Jeong, Yong-Hwan Park
  • Publication number: 20100090222
    Abstract: A thin film transistor according to one or more embodiments of the present invention includes: an insulation substrate; a gate electrode formed on the substrate; a gate insulating layer formed on the gate electrode; a semiconductor formed on the gate insulating layer and having a pair of openings facing each other; ohmic contact layers formed in the openings and including a conductive impurity; and a source electrode and a drain electrode in contact with their respective ohmic contact layers. An organic light emitting device in accordance with an embodiment includes: a first signal line and a second signal line intersecting each other on an insulation substrate; a switching thin film transistor connected to the first signal line and the second signal line; a driving thin film transistor connected to the switching thin film transistor; and a light emitting diode (LED) connected to the driving thin film transistor.
    Type: Application
    Filed: April 8, 2009
    Publication date: April 15, 2010
    Inventors: Yong-Hwan Park, Byoung-Seong Jeong, Joon-Hoo Choi, Sang-Ho Moon
  • Publication number: 20080180363
    Abstract: An improved OLED display includes a substrate, a semiconductor having a uniform thickness formed on the substrate, first and second ohmic contacts, and a driving voltage line having an input electrode and an output electrode. An insulating layer is formed on the driving voltage line and the output electrode. A control electrode is formed on the insulating layer and overlaps the semiconductor. The method of manufacturing the OLED display entails forming a semiconductor on a substrate, forming a photoresist film on the semiconductor, forming a doped amorphous silicon layer on the photoresist film, removing the photoresist film along with a portion of the doped amorphous silicon disposed on the photoresist film to form first and second ohmic contacts, respectively forming input and output electrodes on the first and second ohmic contacts, forming an insulating layer on the input and output electrodes, and forming a control electrode on the insulating layer.
    Type: Application
    Filed: October 29, 2007
    Publication date: July 31, 2008
    Inventors: Byoung-Seong JEONG, Joon-Hoo Choi, Yong-Hwan Park
  • Publication number: 20080169463
    Abstract: An organic light emitting device includes a substrate, first and second ohmic contacts formed on the substrate, a driving semiconductor formed on the substrate and the first and second ohmic contacts and including polysilicon, a driving input electrode electrically connected to the first ohmic contact, a driving output electrode electrically connected to the second ohmic contact, a first gate insulating layer formed on the driving semiconductor, the driving input electrode, and the driving output electrode, and a driving control electrode formed on the first gate insulating layer and overlapping the driving semiconductor.
    Type: Application
    Filed: October 31, 2007
    Publication date: July 17, 2008
    Inventors: Byoung-Seong Jeong, Kyu-Sik Cho, Joon-Hoo Choi, Yong-Hwan Park
  • Patent number: 6813156
    Abstract: A computer system is provided that includes a casing and a power supplying unit combined to the casing, a pair of guiding projections protruding from opposite sides of the power supplying unit, a pair of guiding members accommodating the pair of guiding projections and guiding the power supplying unit from a released position to a combining position, a stopper provided in at least one of the two guiding members and preventing the power supplying unit from separating beyond the released position, and a supporter supporting the power supplying unit, together with the stopper, when the power supplying unit is opened by rotating through a predetermined angle. With this configuration, the computer system provides a combining structure for a power supplying unit, in which hardware components can be easily cabled, exchanged, and repaired.
    Type: Grant
    Filed: May 7, 2002
    Date of Patent: November 2, 2004
    Assignee: Samsung Electronics Co., LTD
    Inventor: Yong-Hwan Park
  • Patent number: 6592716
    Abstract: Security fibers having enhanced antifalsification features are prepared by a process which comprises the steps of: i) braiding 5 to 30 denier fibers to form a twine; ii) dyeing the twine with a dye or pigment; iii) drying the dyed twine; and then iv) cutting the dried twine to give the security fibers in the form of cut fibers.
    Type: Grant
    Filed: September 1, 2000
    Date of Patent: July 15, 2003
    Assignee: Korea Security Printing and Minting Corporation
    Inventors: Jong-Kyu Kim, Yong-Hwan Park
  • Publication number: 20020196600
    Abstract: A computer system is provided that includes a casing and a power supplying unit combined to the casing, a pair of guiding projections protruding from opposite sides of the power supplying unit, a pair of guiding members accommodating the pair of guiding projections and guiding the power supplying unit from a released position to a combining position, a stopper provided in at least one of the two guiding members and preventing the power supplying unit from separating beyond the released position, and a supporter supporting the power supplying unit, together with the stopper, when the power supplying unit is opened by rotating through a predetermined angle. With this configuration, the computer system provides a combining structure for a power supplying unit, in which hardware components can be easily cabled, exchanged, and repaired.
    Type: Application
    Filed: May 7, 2002
    Publication date: December 26, 2002
    Inventor: Yong-Hwan Park
  • Publication number: 20020058138
    Abstract: A partially metallized film having a dyed region and a transparent region alternately at an each regular interval on a major surface thereof is useful as a security thread to be embedded in a security paper. The partially metallized film for a security thread is conveniently prepared by printing a fluorescent pigment or dyestuff at a regular interval on a transparent film, applying a water-soluble ink over the dyed regions and to another selected portions of the film at a regular interval, depositing a layer of a metal on the entire surface of the transparent film including the water-soluble ink layer; and washing the metal deposited film with water to remove the portion of the metal layer deposited on the water-soluble ink layer.
    Type: Application
    Filed: December 27, 2001
    Publication date: May 16, 2002
    Applicant: Korea Security Printing and Minting Corporation of # 35
    Inventors: Jong-Kyu Kim, Yong-Hwan Park
  • Patent number: 6324373
    Abstract: The present invention relates to a pre-transfer system of an image forming apparatus wherein the pre-transfer efficiency is enhanced by a pre-transfer lamp (“PTL”) being placed upstream of the delivering path of a recording paper and the light emitted from the PTL being directly scanned to a photosensitive drum. The PTL is placed upstream of the delivering path of the paper, a lens is disposed opposite to a light emitting portion of the PTL, the lens spreading the light emitted from the PTL in the scanning direction of the photosensitive drum and, at the same time, collecting the light in a direction perpendicular to the scanning direction, and a light guide member is disposed at an angle with respect to the lens and the photosensitive drum, the light guide member guiding the light spread and collected by the lens to the surface of the photosensitive drum.
    Type: Grant
    Filed: July 7, 2000
    Date of Patent: November 27, 2001
    Assignee: SamSung Electronics Co., Ltd.
    Inventor: Yong-Hwan Park
  • Patent number: 5734548
    Abstract: Disclosed is a portable computer having a separable keyboard which includes a base housing, a keyboard spread over the base housing, and a lid that can be folded over the base housing. The keyboard is separated into two sections and a corner of each keyboard section is hinged with the base housing. By a keyboard spring, the two keyboard sections are biased to be rotated together. After the opening of the lid, a user may manually rotate the keyboard halves apart to one of several discrete angles. When the user is finished working on the computer, the user may close the lid. As the user doses the lid, the separated keyboard halves are automatically rejoined without any additional effort by the user. In the corners of the keyboard sections, opposite to the right and left of the corner in which the hinge portion is formed, are formed a plurality of lever grooves which allow the keyboard sections to be maintained in a spread-apart state.
    Type: Grant
    Filed: July 18, 1996
    Date of Patent: March 31, 1998
    Assignee: SamSung Electronics Co., Ltd.
    Inventor: Yong-Hwan Park