×

Driving system for active-matrix displays

  • US 9,792,857 B2
  • Filed: 04/15/2016
  • Issued: 10/17/2017
  • Est. Priority Date: 02/03/2012
  • Status: Active Grant
First Claim
Patent Images

1. A method of using raw grayscale image data representing images to be displayed in successive frames, to drive a display having pixels that include a drive transistor and an organic light emitting device, said method comprising:

  • dividing each frame into at least a first sub-frame and a second sub-frame, a time period of a longer sub-frame of the first and second sub-frames being greater than a time period of a shorter sub-frame of the first and second sub-frames;

    for each pixel and for each framebased upon which of the first and second sub-frames is the longer sub-frame and which of the first and second sub-frames is the shorter sub-frame, converting raw grayscale values to a grayscale value for the longer sub-frame of the first and second sub-frames and a grayscale value for the shorter sub-frame of the first and second sub-frames, such thatthe grayscale value for the longer sub-frame of the first and second sub-frames is greater than the grayscale value for the shorter sub-frame of the first and second sub-frames for raw grayscale values in a preselected high range of grayscale values, andthe grayscale value for the longer sub-frame of the first and second sub-frames is less than the grayscale value for the shorter sub-frame of the first and second sub-frames for raw grayscale values in a preselected low range of grayscale values less than the grayscale values of the preselected high range of grayscale values; and

    compensating for changing parameters of the drive transistor of the pixel with use ofthe grayscale value for the longer sub-frame of the first and second sub-frames when the raw grayscale value for the frame is in the preselected high range of grayscale values; and

    the grayscale value for the shorter sub-frame of the first and second sub-frames when the raw grayscale value for the frame is in the preselected low range of grayscale values.

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