Patents by Inventor Joon-Hoo Choi

Joon-Hoo 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).

  • Patent number: 8519386
    Abstract: An organic light emitting device and a manufacturing method thereof, including a first signal line and a second signal line intersecting each other on an insulating 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 (“LD”) connected to the driving thin film transistor. The driving thin film transistor includes a driving control electrode and a driving semiconductor overlapping the driving control electrode, crystallized silicon having a doped region and a non-doped region, a driving gate insulating layer disposed between the driving control electrode and the driving semiconductor, and a driving input electrode and a driving output electrode opposite to each other on the driving semiconductor, wherein the interface between the driving gate insulating layer and the driving semiconductor includes nitrogen gas.
    Type: Grant
    Filed: June 25, 2012
    Date of Patent: August 27, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Kyu-Sik Cho, Byoung-Seong Jeong, Joon-Hoo Choi, Jong-Moo Huh
  • Publication number: 20130200379
    Abstract: A thin film transistor (TFT) array substrate includes a TFT including an active layer, a gate electrode, source and drain electrodes, a first insulating layer between the active layer and the gate electrode, and a second insulating layer and a third insulating layer between the gate electrode and the source and drain electrodes, the first insulating layer and the second insulating layer extending in the TFT, a pixel electrode including a transparent conductive oxide material, the pixel electrode being on the first insulating layer and the second insulating layer and being connected to the source or drain electrodes via an opening in the third insulating layer, a capacitor including a first electrode on a same layer as the gate electrode and a second electrode on a same layer as the pixel electrode; and a fourth insulating layer covering the source and drain electrodes and exposing the pixel electrode via an opening.
    Type: Application
    Filed: August 20, 2012
    Publication date: August 8, 2013
    Inventors: Chun-Gi YOU, Joon-Hoo Choi
  • Patent number: 8502206
    Abstract: An organic light emitting diode (OLED) display device and a method of fabricating the same are disclosed.
    Type: Grant
    Filed: November 8, 2010
    Date of Patent: August 6, 2013
    Assignee: Samsung 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
  • Patent number: 8493292
    Abstract: An organic light emitting diode (“OLED”) display includes a substrate; a gate line formed on the substrate; a secondary gate line substantially parallel to the gate line; a plurality of control electrodes each connected to one of the gate line and the secondary gate line; a data line intersecting the gate line and the secondary gate line; a switching thin film transistor (“TFT”) connected to the gate line and the data line; a driving TFT connected to the switching TFT; a first electrode connected to the driving TFT; a second electrode facing the first electrode; and a light emitting member formed between the first electrode and the second electrode.
    Type: Grant
    Filed: January 10, 2007
    Date of Patent: July 23, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventor: Joon-Hoo Choi
  • Patent number: 8481998
    Abstract: A display device and a manufacturing method thereof are provided. The display device includes a substrate, a semiconductor layer formed on the substrate, an organic insulating layer formed on the semiconductor layer, a plurality of conductive wires formed on the organic insulating layer. The organic insulating layer has an open groove that is formed between the conductive wires.
    Type: Grant
    Filed: April 29, 2011
    Date of Patent: July 9, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Kyu-Sik Cho, Joon-Hoo Choi, Bo-Kyung Choi, Sang-Ho Moon
  • Publication number: 20130164872
    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: February 20, 2013
    Publication date: June 27, 2013
    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: 20130161632
    Abstract: An OLED apparatus including a thin film transistor including an activation layer, a gate electrode insulated from the activation layer and including a lower gate electrode and an upper gate electrode, an interlayer insulation film covering the gate electrode, and a source and drain electrode on the insulation film and contacting the activation layer; an OLED including a pixel electrode electrically connected to the thin film transistor, an intermediate layer including an emissive layer, and an opposite electrode; a blister prevention layer on a same level as the activation layer; a gate insulation layer covering the activation layer and the blister prevention layer and insulating the activation layer from the gate electrode; and an interconnection unit including first and second layers on a portion of the gate insulation layer overlying the blister prevention layer, wherein the blister prevention layer protects the interconnection unit on the gate insulation layer from blistering.
    Type: Application
    Filed: August 23, 2012
    Publication date: June 27, 2013
    Inventors: Chun-Gi YOU, Joon-Hoo Choi
  • Publication number: 20130153914
    Abstract: An organic light-emitting display device includes a thin film transistor on a substrate, a first wiring and a second wiring overlapping each other, the first and second wirings being at different heights relative to the substrate and being connected to the thin film transistor, and a plurality of insulating layers between the first wiring and the second wiring.
    Type: Application
    Filed: June 13, 2012
    Publication date: June 20, 2013
    Inventors: Chun-Gi You, Joon-Hoo Choi
  • Publication number: 20130126882
    Abstract: A thin film transistor array substrate includes a thin film transistor including an activation layer, a gate electrode, source and drain electrodes, a first insulation layer between the activation layer and the gate electrode, and a second insulation layer between the gate electrode and the source and drain electrodes, a pixel electrode including a transparent conductive oxide, the pixel electrode being on a portion of the first insulation layer extending from the thin film transistor and being connected to one of the source and drain electrodes via an opening in the second insulation layer, a capacitor including a first electrode and a second electrode, the first electrode being on a same layer as the activation layer and including a transparent conductive oxide, and the second electrode being between the first and second insulation layers, and a third insulation layer covering the source and drain electrodes and exposing the pixel electrode.
    Type: Application
    Filed: May 25, 2012
    Publication date: May 23, 2013
    Inventors: Chun-Gi YOU, Joon-Hoo Choi
  • Publication number: 20130119387
    Abstract: An organic light-emitting display apparatus includes: a substrate including an emission region and a non-emission region and having a recess formed in at least a portion of the non-emission region; a black matrix disposed in the recess; a thin film transistor disposed on the non-emission region of the substrate and including an active layer, a gate electrode, and source and drain electrodes; a pixel electrode disposed on the emission region of the substrate and electrically connected to one of the source and drain electrodes; an organic emission layer disposed on the pixel electrode; and an opposite electrode disposed on the organic emission layer.
    Type: Application
    Filed: May 10, 2012
    Publication date: May 16, 2013
    Applicant: SAMSUNG MOBILE DISPLAY CO., LTD.
    Inventors: Yong-Woo Park, Chun-Gi You, Joon-Hoo Choi, Won-Pil Lee
  • Publication number: 20130105821
    Abstract: An organic electroluminescent display device includes a first electrode on a substrate, an organic layer including a light-emitting layer on the first electrode, a second electrode including lower and upper conductive layers sequentially stacked on the organic layer, and an insulating pattern extending into the organic layer through the lower conductive layer.
    Type: Application
    Filed: June 21, 2012
    Publication date: May 2, 2013
    Applicant: SAMSUNG MOBILE DISPLAY CO., LTD.
    Inventors: Chun Gi You, Joon Hoo Choi
  • Publication number: 20130105801
    Abstract: Display substrates including a capacitor, methods of repairing a display substrate, and display devices including the display substrate are disclosed. In one embodiment, the capacitor includes a first electrode layer, a dielectric layer, and a second electrode layer sequentially stacked. A portion of the second electrode layer is shorted to the first electrode layer. An opening penetrates the second electrode layer to expose a top surface of the dielectric layer. Due to the opening, the shorted portion is separated from the surrounding portions of the second electrode layer. The opening may be formed by irradiating a laser.
    Type: Application
    Filed: April 16, 2012
    Publication date: May 2, 2013
    Applicant: Samsung Mobile Display Co., Ltd.
    Inventors: Yul Kyu Lee, Sun Park, Joon Hoo Choi
  • Patent number: 8426863
    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: Grant
    Filed: April 8, 2009
    Date of Patent: April 23, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yong-Hwan Park, Byoung-Seong Jeong, Joon-Hoo Choi, Sang-Ho Moon
  • Patent number: 8415666
    Abstract: In a thin film transistor substrate, an active pattern of a thin film transistor includes a lower semiconductor pattern and an upper semiconductor pattern that are patterned through different process steps. The lower semiconductor pattern defines a channel area of the thin film transistor, and the upper semiconductor pattern is connected to a side portion of the lower semiconductor pattern and makes contact with the source electrode and the drain electrode. An etch stop layer is formed on the lower semiconductor pattern corresponding to the channel area, and the etch stop layer is formed through the same patterning process as the lower semiconductor pattern. Also, an ohmic contact pattern is formed on the upper semiconductor pattern, and the ohmic contact pattern is formed by the same patterning process as the upper semiconductor pattern.
    Type: Grant
    Filed: March 17, 2009
    Date of Patent: April 9, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jong-Moo Huh, Joon-Hoo Choi
  • Patent number: 8389984
    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: Grant
    Filed: November 23, 2010
    Date of Patent: March 5, 2013
    Assignee: Samsung Display Co., Ltd.
    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: 20130048990
    Abstract: A substrate includes an active layer, a gate electrode, source and drain electrodes, first and second insulating layers, a first line and a second line on a same layer as the gate electrode, the first line and the second line include a same material as the gate electrode and are aligned in a first direction, a third line crosses the first line, the third line is on a same layer as the source and drain electrodes, includes a same material as the source and drain electrodes, and is aligned in a second direction, a repair line on a same layer as the active layer, the repair line includes a same material as the active layer, a pixel electrode in the pixel region, and the pixel electrode is on a same layer as a lower electrode of the gate electrode and includes a same material as the lower electrode.
    Type: Application
    Filed: March 9, 2012
    Publication date: February 28, 2013
    Inventors: Jong-Hyun PARK, Joon-Hoo CHOI, Seong-Kweon HEO
  • Patent number: 8384087
    Abstract: A thin film transistor includes a substrate, a buffer layer on the substrate, a semiconductor layer including source/drain regions and a channel region on the buffer layer, a gate insulating layer corresponding to the channel region, a gate electrode corresponding to the channel region, and source/drain electrodes electrically connected to the semiconductor layer. A polysilicon layer of the channel region may include only a low angle grain boundary, and a high angle grain boundary may be disposed in a region of the semiconductor layer that is apart from the channel region.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: February 26, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yong-Duck Son, Ki-Yong Lee, Joon-Hoo Choi, Min-Jae Jeong, Seung-Kyu Park, Kil-Won Lee, Jae-Wan Jung, Dong-Hyun Lee, Byung-Soo So, Hyun-Woo Koo, Ivan Maidanchuk, Jong-Won Hong, Heung-Yeol Na, Seok-Rak Chang
  • Publication number: 20130037828
    Abstract: An organic light-emitting display and a method of manufacturing the organic light-emitting display are disclosed. In one embodiment, the organic light-emitting display includes: i) a pixel electrode disposed on a substrate, ii) an opposite electrode disposed opposite to the pixel electrode, iii) an organic emission layer disposed between the pixel electrode and the opposite electrode; a light-scattering portion disposed between the substrate and the organic emission layer, including a plurality of scattering patterns for scattering light emitted from the organic emission layer in insulating layers having different refractive indexes. The display may further include a plurality of light absorption portions disposed between the light-scattering portion and the organic emission layer to correspond to the scattering patterns.
    Type: Application
    Filed: December 21, 2011
    Publication date: February 14, 2013
    Applicant: Samsung Mobile Display Co., Ltd.
    Inventors: Sang-Ho Moon, Joon-Hoo Choi, Kyu-Sik Cho
  • Publication number: 20130032803
    Abstract: An OLED device includes an active layer on a substrate; a first insulating layer covering the active layer, and including a first opening and a first insulation island in the first opening, separated from an inner surface of the first opening; a gate electrode on the first insulating layer including gate bottom and top electrodes; a pixel electrode on the first insulation island on the same layer as the gate bottom electrode; source and drain electrodes insulated from the gate electrode and electrically connected to the active layer; a second insulating layer between the gate and the source and drain electrodes, and including a second opening exposing the pixel electrode; a light-reflecting portion in the openings, and surrounding the pixel electrode; an intermediate layer on the pixel electrode and including an organic emissive layer; and an opposite electrode facing the pixel electrode with the intermediate layer interposed between them.
    Type: Application
    Filed: December 27, 2011
    Publication date: February 7, 2013
    Applicant: SAMSUNG MOBILE DISPLAY CO., LTD.
    Inventors: Sang-Ho Moon, Joon-Hoo Choi, Chun-Gi You, Kyu-Sik Cho, Jong-Hyun Park
  • Patent number: 8330257
    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: Grant
    Filed: July 6, 2012
    Date of Patent: December 11, 2012
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sang-Ho Moon, Joon-Hoo Choi, Kyu-Sik Cho, Byoung-Seong Jeong, Yong-Hwan Park