Patents by Inventor Cheung Lee

Cheung 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).

  • Publication number: 20070035499
    Abstract: A driving circuit for driving a display panel including a plurality of cells arranged in rows. The driving circuit comprises a gate electrode driving circuit to provide a gate voltage to a row of cells, a common electrode driving circuit to provide a common voltage to the row of cells, and an external capacitor coupled to the gate electrode driving circuit and the common electrode driving circuit to provide an additional gate voltage to the row of cells. The external capacitor is charged by a potential difference between the common voltage and the gate voltage.
    Type: Application
    Filed: August 15, 2005
    Publication date: February 15, 2007
    Inventors: Cheung Lee, Yiu Lei
  • Publication number: 20060145675
    Abstract: A DC-DC converter circuit includes an inductor having an inductor current, an inductor current emulation circuit for producing an emulated inductor current, and a control circuit coupled with the emulation circuit for receiving the emulated inductor current and determining a peak inductor current for the DC-DC converter.
    Type: Application
    Filed: January 6, 2005
    Publication date: July 6, 2006
    Inventors: Cheung Lee, Stephen Lai, Alvin Chan, David Or
  • Publication number: 20050146281
    Abstract: According to the present invention, a display driver includes a voltage and current source that drive pixels and compensate for parasitic voltage to produce row pixels having intensities that are relatively uncorrelated to the number of “ON” pixels in a given row. The voltage source that provides the pre-charge for each pixel includes a constant value and a compensation voltage determined based on the number of “ON” pixels in each row. The compensation voltage is also determined based on the characteristics of the diodes associated with each pixel and the resistance associated the common ground of each row.
    Type: Application
    Filed: December 30, 2003
    Publication date: July 7, 2005
    Inventors: Chung Ricky Ng, Stephen Lai, Wai Felix Wong, Cheung Lee