×

Data signal driver for light emitting display

  • US 20060261841A1
  • Filed: 08/20/2004
  • Published: 11/23/2006
  • Est. Priority Date: 08/20/2004
  • Status: Active Grant
First Claim
Patent Images

1. A method of determining the pixel drive signals to be applied to the pixels of an array of light emitting display elements (2) arranged in rows and columns, with a plurality of the pixels in a column being supplied with current from a respective column power supply line (26) and the pixels being addressed row by row, the addressing of all rows defining a field period, the method comprising:

  • determining target pixel drive currents corresponding to desired pixel brightness levels based on a model of the pixel current-brightness characteristics;

    modifying the target pixel drive currents to take account of;

    the voltage on the column power supply line (26) at each pixel resulting from the currents drawn from the column power supply line (26) by the plurality of pixels in the column for each row addressing cycle in a field period; and

    the dependency of the pixel brightness characteristics on the voltage on the column power supply line at the pixel.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×