Patents by Inventor Yong-Wook Hwao

Yong-Wook Hwao 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).

  • Optical waveguide sheet and manufacturing method thereof
    Patent number: 7646956
    Abstract: An optical waveguide sheet that has an auxiliary layer for preventing light transmitted through the waveguide sheet from leaking or being lost and a manufacturing method thereof. The waveguide sheet transmits light from a light emitting element thereinto, and has a reflecting pattern for reflecting light forward. At least one auxiliary layer for providing a total reflection condition for preventing the light from leaking or being lost when the light is transmitted into the waveguide sheet is coated on the waveguide sheet.
    Type: Grant
    Filed: January 30, 2008
    Date of Patent: January 12, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yong-Wook Hwao, Chang-Youn Hwang, Young-Ki Kim, Shin-Chul Kang, Ki-Duk Jang