Patents by Inventor Byeong Wook Yoo

Byeong Wook Yoo 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: 7872256
    Abstract: An organic light emitting display that includes a substrate, a plurality of first electrodes arranged in a corresponding plurality of pixels, the plurality of pixels including red pixels, blue pixels and green pixels, a hole injection layer arranged on the first electrodes arranged on the substrate, the hole injection layer having different respective thicknesses in correspondence with the pixels, a hole transport layer entirely covering the hole injection layer, a white light emitting layer entirely covering the hole transport layer, an electron transport layer arranged on the white light emitting layer, a second electrode arranged on the electron transport layer and a color filter arranged on the second electrode.
    Type: Grant
    Filed: March 26, 2007
    Date of Patent: January 18, 2011
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventors: Yeun-Joo Sung, Hee-Seong Jeong, Byeong-Wook Yoo, Jun-Sik Oh, Sam-Il Kho
  • Publication number: 20100051925
    Abstract: An organic light emitting diode (OLED) display device which can improve emission efficiency and reduce (or minimize) resonance effect, and a method of fabricating the same. The OLED display device includes a substrate; a first electrode disposed on the substrate and including a reflective layer; an organic layer disposed on the first electrode and including a white emission layer and a hole injection layer having a thickness between 200 and 300 ?; and a second electrode disposed on the organic layer.
    Type: Application
    Filed: August 28, 2009
    Publication date: March 4, 2010
    Inventors: Sam-Il Kho, Hee-Seong Jeong, Byeong-Wook Yoo, Gun-Shik Kim, Seong-Taek Lee, Jun-Sik Oh
  • Patent number: 7534545
    Abstract: A laser induced thermal imaging (LITI) apparatus and a method of making an electronic device using the same are disclosed. The LITI apparatus includes a chamber, a substrate support, a contact frame, and a laser source or oscillator. The LITI apparatus transfers a transferable layer from a film donor device onto a surface of an intermediate electronic device. The LITI apparatus uses a magnetic force to provide a close contact between the transferable layer and the surface of the intermediate device. The magnetic force is generated by magnetic materials formed in two components of the LITI apparatus that are spaced apart interposing transferable layer and the surface of the intermediate device. Magnets or magnetic materials are formed in the two following components of the LITI apparatus: 1) the intermediate device and the film donor device; 2) the intermediate device and the contact frame; 3) the substrate support and the film donor device; or 4) the substrate support and the contact frame.
    Type: Grant
    Filed: August 28, 2006
    Date of Patent: May 19, 2009
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Tae Min Kang, Jin Soo Kim, Mu Hyun Kim, Sun Hoe Kim, Noh Min Kwak, Sang Bong Lee, Seong Taek Lee, Seung Hyun Lee, Sok Won Noh, Jin Wook Seong, Myung Won Song, Yeun Joo Sung, Byeong Wook Yoo
  • Publication number: 20090045736
    Abstract: An organic light emitting diode (OLED) display device and a method of fabricating the same are provided. The OLED display device includes: a substrate; a first electrode on the substrate; an organic layer on the first electrode, and including a white emission layer including a mixed host having a first host and a second host having a different polarity from the first host; and a second electrode on the organic layer.
    Type: Application
    Filed: August 14, 2008
    Publication date: February 19, 2009
    Inventors: Sam-Il Kho, Byeong-Wook Yoo, Sun-Hee Lee, Sang-Bong Lee
  • Publication number: 20080241561
    Abstract: An organic light emitting display device and a method of fabricating the same, in which a resonance effect is suppressed and transmittance is substantially the same in a wavelength band of visible light. The organic light emitting display device includes: a substrate; a first electrode disposed on the substrate and including a reflection layer; an organic layer disposed on the first electrode and including a white emission layer; a second electrode disposed on the organic layer; a transmittance controlled layer disposed on the second electrode; and a metal layer disposed on the transmittance controlled layer.
    Type: Application
    Filed: November 8, 2007
    Publication date: October 2, 2008
    Inventors: Hee-Seong Jeong, Sam-Il Kho, Byeong-Wook Yoo, Seong-Taek Lee, Jun-Sik Oh, Gun-Shik Kim
  • Publication number: 20080157663
    Abstract: An organic light emitting diode (OLED) display device includes a substrate, a first electrode disposed on the substrate, an organic layer including an emission layer disposed on the first electrode, and a second electrode including stacked layers of Yb and Ag on the organic layer. A method of fabricating the organic light emitting diode (OLED) display device includes providing a substrate, forming a first electrode on the substrate, forming an organic layer including an emission layer on the first electrode, and forming a second electrode including stacked layers of Yb and Ag on the organic layer.
    Type: Application
    Filed: December 28, 2007
    Publication date: July 3, 2008
    Inventors: YEUN-JOO SUNG, SAM-IL KHO, BYEONG-WOOK YOO
  • Publication number: 20080122348
    Abstract: An organic light emitting display device (OLED) suppressing a resonance effect and having an enhanced luminance, and a method of fabricating the same, are disclosed. One embodiment of the OLED includes: a substrate; a first electrode disposed over the substrate and having a reflective layer; an organic layer disposed over the first electrode and having a white emission layer; a second electrode disposed over the organic layer; and a transmittance controlled layer (TCL) disposed over the second electrode and having an optical path length of about 260 to about 1520 ?.
    Type: Application
    Filed: November 19, 2007
    Publication date: May 29, 2008
    Applicant: Samsung SDI Co., Ltd.
    Inventors: Hee-Seong Jeong, Sam-II Kho, Byeong-Wook Yoo, Seong-Taek Lee, Jun-Sik Oh, Gun-Shik Kim
  • Publication number: 20080116790
    Abstract: Provided are an organic light emitting diode display device including an emission layer structure between a first electrode and a second electrode, in which a first emission layer and a second emission layer are stacked, wherein the first emission layer emits one of red, green and blue light, and the second emission layer comprises a host and dopants of two different colors other than the color of the light emitted from the first emission layer among the red, green, and blue light, capable of reducing a driving voltage and obtaining high emission intensity at each wavelength of red, green, and blue light to thereby efficiently implement full color.
    Type: Application
    Filed: November 20, 2007
    Publication date: May 22, 2008
    Inventors: Sam-Il Kho, Byeong-Wook Yoo, Yeun-Joo Sung
  • Publication number: 20080111474
    Abstract: An organic light emitting display that includes a substrate, a plurality of first electrodes arranged in a corresponding plurality of pixels, the plurality of pixels including red pixels, blue pixels and green pixels, a hole injection layer arranged on the first electrodes arranged on the substrate, the hole injection layer having different respective thicknesses in correspondence with the pixels, a hole transport layer entirely covering the hole injection layer, a white light emitting layer entirely covering the hole transport layer, an electron transport layer arranged on the white light emitting layer, a second electrode arranged on the electron transport layer and a color filter arranged on the second electrode.
    Type: Application
    Filed: March 26, 2007
    Publication date: May 15, 2008
    Inventors: Yeun-Joo Sung, Hee-Seong Jeong, Byeong-Wook Yoo, Jun-Sik Oh, Sam-Il Kho
  • Publication number: 20070262299
    Abstract: An organic light emitting device which has an anode, i.e. a lower electrode, made of a single metal layer in a top emission structure, and a method of fabricating the same are provided. The organic light emitting device is constructed with a substrate, an anode disposed on the substrate and including a metal, a metal fluoride layer disposed on the anode, an organic layer disposed on the metal fluoride layer and including at least an organic emission layer, and a cathode disposed on the organic layer.
    Type: Application
    Filed: December 14, 2006
    Publication date: November 15, 2007
    Inventors: Sam-Il Kho, Byeong-Wook Yoo, Yeun-Joo Sung, Jae-Ho Lee, Seung-Hyun Lee, Seung-Wook Chang, Nam-Choul Yang, Myung-Won Song
  • Patent number: 7264915
    Abstract: A manufacturing method using an additional heat-treatment process for a donor film with improved surface roughness. The improved donor film, used in a laser induced thermal imaging method, is capable of enhancing the lifetime of products and reducing the defect rates thereof. A manufacturing method for a donor film according to the invention, includes: providing a donor film comprising a base film, a light-to-heat conversion layer and an organic film; heating the donor film to provide a heat-treated donor film; and cooling the heat-treated donor film. The surface roughness of a donor film can be improved, and the non-uniform distribution of a laser on a region subjected to the LITI process can be minimized to prevent the over- or under-transfer of an transferred organic film, etc., and the non-uniform adhesion of the transferred organic film with an acceptor substrate.
    Type: Grant
    Filed: September 12, 2006
    Date of Patent: September 4, 2007
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Myung Won Song, Tae Min Kang, Sam Il Kho, Young Gil Kwon, Mu Hyun Kim, Sun Hoe Kim, Sok Won Noh, Yeun Joo Sung, Jin Wook Seong, Nam Choul Yang, Byeong Wook Yoo, Seong Taek Lee, Jae Ho Lee
  • Publication number: 20070123135
    Abstract: A method of fabricating an Organic Light Emitting Diode (OLED) includes: forming red, green, blue and white pixel regions on a substrate; forming first electrodes in the respective pixel regions on the substrate, the first electrodes being spaced apart from one another; forming a pixel defining layer having an opening partially exposing surfaces of the first pixel electrodes on the substrate; forming organic layers including at least an organic EMission Layer (EML) in the opening of the pixel defining layer; forming a second electrode on the organic layers; forming a passivation layer on the second electrode; and forming red, green and blue color filter layers on the passivation layer using a laser induced thermal imaging method to correspond to the organic layers of the red, green and blue pixel regions, the red, green and blue color filter layers being sequentially formed and ends of a first-formed color filter layer overlapping second and third formed color filter layers.
    Type: Application
    Filed: November 14, 2006
    Publication date: May 31, 2007
    Inventors: Nam-Choul Yang, Sam-Il Kho, Byeong-Wook Yoo