Patents by Inventor Tung-Lung Liu

Tung-Lung Liu 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).

  • LED lighting string employing rectified and filtered device
    Patent number: 7501772
    Abstract: An improved LED lighting string employs a rectified and filtered device functioned as a low pass filter device to rectify input AC source into DC source providing to the LED lighting string for improving LED's flickering issue and to upgrade the optical power factor and efficiency, and luminous intensity in LED lighting string.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: March 10, 2009
    Assignee: Excellence Opto. Inc.
    Inventors: Wen-Chen Chung, Chun-Hsien Liu, Tung-Lung Liu
  • LED lighting string employing rectified and filtered device
    Publication number: 20080157686
    Abstract: An improved LED lighting string employs a rectified and filtered device functioned as a low pass filter device to rectify input AC source into DC source providing to the LED lighting string for improving LED's flickering issue and to upgrade the optical power factor and efficiency, and luminous intensity in LED lighting string.
    Type: Application
    Filed: December 29, 2006
    Publication date: July 3, 2008
    Applicant: Excellence Opto. Inc.
    Inventors: Wen-Chen Chung, Chun-Hsien Liu, Tung-Lung Liu