Patents by Inventor Peter R. Richards

Peter R. Richards 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).

  • Prevention of charge accumulation in micromirror devices through bias inversion
    Patent number: 7417609
    Abstract: Methods and apparatus are provided for preventing charge accumulation in microelectromechanical systems, especially in micromirror array devices having a plurality of micromirrors. Voltages are applied to the micromirrors for actuating the micromirrors. Polarities of the voltage differences between mirror plates and electrodes are inverted so as to prevent charge accumulation.
    Type: Grant
    Filed: September 25, 2007
    Date of Patent: August 26, 2008
    Assignee: Texas Instruments Incorporated
    Inventor: Peter R. Richards
  • Prevention of charge accumulation in micromirror devices through bias inversion
    Patent number: 7274347
    Abstract: Methods and apparatus are provided for preventing charge accumulation in microelectromechanical systems, especially in micromirror array devices having a plurality of micromirrors. Voltages are applied to the micromirrors for actuating the micromirrors. Polarities of the voltage differences between mirror plates and electrodes are inverted so as to prevent charge accumulation.
    Type: Grant
    Filed: June 27, 2003
    Date of Patent: September 25, 2007
    Assignee: Texas Instruments Incorporated
    Inventor: Peter R. Richards
  • Prevention of charge accumulation in micromirror devices through bias inversion
    Publication number: 20040263430
    Abstract: Methods and apparatus are provided for preventing charge accumulation in microelectromechanical systems, especially in micromirror array devices having a plurality of micromirrors. Voltages are applied to the micromirrors for actuating the micromirrors. Polarities of the voltage differences between mirror plates and electrodes are inverted so as to prevent charge accumulation.
    Type: Application
    Filed: June 27, 2003
    Publication date: December 30, 2004
    Inventor: Peter R. Richards