Patents by Inventor Hyo-Chung Lee

Hyo-Chung Lee 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).

  • Driver for liquid-filled lens generating high-voltage drive signal
    Patent number: 7619830
    Abstract: A liquid-filled lens driver is disclosed. The liquid-filled lens includes an input/output interface unit, a system clock generation unit, a high voltage generation unit, a reference/bias voltage generation unit, a drive signal generation unit and a control unit. The input/output interface unit exchanges the lens driver control signal and the status information of the liquid-filled lens with the image signal processor. The high voltage generation unit generates high voltage using low voltage of a battery of a mobile information terminal. The voltage generation unit provides reference voltage and bias voltage for operating the liquid-filled lens driver. The drive signal generation unit generates a final drive signal for the liquid-filled lens.
    Type: Grant
    Filed: November 26, 2004
    Date of Patent: November 17, 2009
    Assignee: Varioptic S.A.
    Inventors: Hyo-Chung Lee, Sang-Hyun Han
  • Driver for liquid-filled lens generating high-voltage drive signal
    Publication number: 20070165159
    Abstract: A liquid-filled lens driver is disclosed. The liquid-filled lens includes an input/output interface unit, a system clock generation unit, a high voltage generation unit, a reference/bias voltage generation unit, a drive signal generation unit and a control unit. The input/output interface unit exchanges the lens driver control signal and the status information of the liquid-filled lens with the image signal processor. The high voltage generation unit generates high voltage using low voltage of a battery of a mobile information terminal. The voltage generation unit provides reference voltage and bias voltage for operating the liquid-filled lens driver. The drive signal generation unit generates a final drive signal for the liquid-filled lens.
    Type: Application
    Filed: November 26, 2004
    Publication date: July 19, 2007
    Inventors: Hyo-Chung Lee, Sang-Hyun Han