Patents by Inventor Ji-Woon Sung

Ji-Woon Sung 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).

  • Driving controlling apparatus for linear compressor and method thereof
    Patent number: 7845912
    Abstract: A driving controlling apparatus for a linear compressor, comprises: a storing unit for storing a reference phase difference to judge an overload state; and a controlling unit for judging an overload state based on a comparison result between the reference phase difference and a phase difference between a current and a stroke, and controlling a voltage or a current applied to a linear motor based on the judgement result.
    Type: Grant
    Filed: October 31, 2006
    Date of Patent: December 7, 2010
    Assignee: LG Electronics Inc.
    Inventors: Ji-Woon Sung, Jae-Yoo Yoo, Chel-Woong Lee
  • Driving controlling apparatus for linear compressor and method thereof
    Patent number: 7547197
    Abstract: A driving controlling apparatus for a linear compressor, comprises a controlling unit for detecting a TDC by a phase difference inflection point between a stoke and a current with increasing the stroke by controlling the current applied to a linear motor, and for varying the current applied to the linear motor based on the detected TDC.
    Type: Grant
    Filed: October 31, 2006
    Date of Patent: June 16, 2009
    Assignee: LG Electronics Inc.
    Inventors: Ji-Woon Sung, Jae-Yoo Yoo, Chel-Woong Lee
  • DRIVING CONTROLLING APPARATUS FOR LINEAR COMPRESSOR AND METHOD THEREOF
    Publication number: 20070241698
    Abstract: A driving controlling apparatus for a linear compressor, comprises: a storing unit for storing a reference phase difference to judge an overload state; and a controlling unit for judging an overload state based on a comparison result between the reference phase difference and a phase difference between a current and a stroke, and controlling a voltage or a current applied to a linear motor based on the judgement result.
    Type: Application
    Filed: October 31, 2006
    Publication date: October 18, 2007
    Applicant: LG ELECTRONICS INC.
    Inventors: Ji-Woon Sung, Jae-Yoo Yoo, Chel-Woong Lee
  • DRIVING CONTROLLING APPARATUS FOR LINEAR COMPRESSOR AND METHOD THEREOF
    Publication number: 20070241697
    Abstract: A driving controlling apparatus for a linear compressor, comprises a controlling unit for detecting a TDC by a phase difference inflection point between a stoke and a current with increasing the stroke by controlling the current applied to a linear motor, and for varying the current applied to the linear motor based on the detected TDC.
    Type: Application
    Filed: October 31, 2006
    Publication date: October 18, 2007
    Applicant: LG ELECTRONICS INC.
    Inventors: Ji-Woon SUNG, Jae-Yoo YOO, Chel-Woong LEE