Patents by Inventor Do-Kyung Ko

Do-Kyung 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).

  • Green Laser Generation Device, and Portable Electronic Machine Having Laser Projection Display Using the Said Device
    Publication number: 20100290488
    Abstract: The present invention relates to a green laser generation device which can be applied to a cellular phone, and more particularly to a green laser generation device which is ultra compact in size having volume of 1 cc or less, despite having a built-in thermo electric cooler, and has sufficient output power, despite having low power consumption, and a portable electronic machine having a laser projection display using the said device. The present invention provides a green laser generation device comprising an LD pump constituted by a photo diode; a fundamental generator generating infrared light laser according to the driving of the LD pump; a second harmonic generator generating green light using the generated infrared light laser; a polarization maintenance unit inserted between the fundamental generator and the second harmonic generator to maintain the polarization of the laser; and a temperature controller controlling an internal temperature of the green laser generation device.
    Type: Application
    Filed: October 13, 2008
    Publication date: November 18, 2010
    Applicant: GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Do-Kyung Ko, Nan-Ei Yu, Chang-Soo Jung, Yeung-Lak Lee, Bong-Ahn Yu