Patents by Inventor Eui-Joong Kim

Eui-Joong Kim 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 pickup device
    Patent number: 7190657
    Abstract: An optical pickup device including a dual wavelength light source module for emitting a selected one of two light beams having different wavelengths, a dual grating for splitting, into three beams, the selected light beam emitted from the dual wavelength light source, and a hologram for focusing the three beams of the selected light beam onto a photodetector having typical 8-section patterns such that the three beams of the selected light beam are focused onto the same spots as those of the other light beam, respectively.
    Type: Grant
    Filed: March 2, 2004
    Date of Patent: March 13, 2007
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Yong-San Shin, Chun-Gi Kim, Oh-Byoung Kwon, Woo-Seok Choi, Sung-Wook Kim, No-Jun Kwak, Eui-Joong Kim
  • Optical pickup device
    Publication number: 20050128923
    Abstract: An optical pickup device including a dual wavelength light source module for emitting a selected one of two light beams having different wavelengths, a dual grating for splitting, into three beams, the selected light beam emitted from the dual wavelength light source, and a hologram for focusing the three beams of the selected light beam onto a photodetector having typical 8-section patterns such that the three beams of the selected light beam are focused onto the same spots as those of the other light beam, respectively.
    Type: Application
    Filed: March 2, 2004
    Publication date: June 16, 2005
    Inventors: Yong-San Shin, Chun-Gi Kim, Oh-Byoung Kwon, Woo-Seok Choi, Sung-Wook Kim, No-Jun Kwak, Eui-Joong Kim