Patents by Inventor Hee-Jo Ko

Hee-Jo Ko 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: 8625055
    Abstract: An organic light emitting display device includes a substrate having a transmitting region interposed between pixel regions; thin film transistors on a first surface of the substrate; a passivation layer covering the thin film transistors; pixel electrodes on the passivation layer; an opposite electrode disposed to face the pixel electrodes; an organic emission layer between the pixel electrodes and the opposite electrode; a polymer dispersed liquid crystal (PDLC) device disposed such that the thin film transistors are between the PDLC device and the passivation layer, the PDLC device having: a first electrode; a second electrode; and a PDLC layer in which liquid crystal is dispersed in polymer matrix. Distortion of images transmitted through the organic light emitting display device is prevented by restricting scattering of the transmitted light, the transmission of the external light may be adjusted simply, and degradation of the brightness and color coordinate reproduction may be prevented.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: January 7, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hyung-Jun Song, Jong-Hyuk Lee, Chang-Ho Lee, Il-Soo Oh, Hee-Jo Ko, Si-Jin Cho, Jin-Young Yun
  • Publication number: 20110249211
    Abstract: An organic light emitting display device includes a substrate having a transmitting region interposed between pixel regions; thin film transistors on a first surface of the substrate; a passivation layer covering the thin film transistors; pixel electrodes on the passivation layer; an opposite electrode disposed to face the pixel electrodes; an organic emission layer between the pixel electrodes and the opposite electrode; a polymer dispersed liquid crystal (PDLC) device disposed such that the thin film transistors are between the PDLC device and the passivation layer, the PDLC device having: a first electrode; a second electrode; and a PDLC layer in which liquid crystal is dispersed in polymer matrix. Distortion of images transmitted through the organic light emitting display device is prevented by restricting scattering of the transmitted light, the transmission of the external light may be adjusted simply, and degradation of the brightness and color coordinate reproduction may be prevented.
    Type: Application
    Filed: March 31, 2011
    Publication date: October 13, 2011
    Inventors: Hyung-Jun Song, Jong-Hyuk Lee, Chang-Ho Lee, Il-Soo Oh, Hee-Jo Ko, Si-Jin Cho, Jin-Young Yun