Re-interpolation with edge detection for extracting an aging pattern for AMOLED displays

摘要

A method that includes an initial uniform pixel measurement and interpolation followed by an edge detection algorithm to recognize the areas that contribute mostly to the estimation error due to the interpolation. The pixels on the detected edges and around their vicinity are also measured, and an aging pattern of the entire display is obtained by re-interpolating the entire measured set of data for the initially measured pixels as well as the pixels around the detected edges. The estimation error is reduced particularly in the presence of aging patterns having highly spatially correlated areas with distinctive edges.

主权项

1. An image compensation method for a display having pixels that are aging due to shifts in one or more aging characteristics of the pixels, each of the pixels comprising a light emitting device, the method comprising:
measuring, using a measurement circuit, an aging characteristic of each pixel of a spaced apart subset of the pixels of the display to produce a set of initial pixel measurements; determining localized maximums of a gradient magnitude defined by the set of initial pixel measurements; defining a second subset of pixels of the display with use of the determined localized maximums of the gradient magnitude; measuring, using the measurement circuit, the aging characteristic of each pixel of the second subset of pixels of the display to produce a second set of pixel measurements; producing an aging pattern based on the set of initial pixel measurements and the second set of pixel measurements; storing the aging pattern in a memory device; generating, with use of the aging pattern, an estimation matrix corresponding to a pixel resolution of the display for improving an image uniformity of the light emitting devices across the display.