Patents Assigned to PPD Systems
  • Patent number: 7714514
    Abstract: An active matrix organic LED display having a matrix of multiple light emitting pixels and electronic drive circuitry for selectively addressing the pixels, each pixel containing an organic LED. The electronic drive circuitry includes row scan electrodes and column data electrodes that interconnect the matrix of pixels. The circuitry also includes a MEMS switching device and a memory capacitor for each pixel, the MEMS switching device connecting the memory capacitor to a column data electrode during addressing of a pixel and connecting the memory capacitor to the organic LED of each pixel during light emission.
    Type: Grant
    Filed: May 4, 2007
    Date of Patent: May 11, 2010
    Assignees: Imaging Systems Technology, PPD Systems
    Inventor: James C. Rutherford