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. A method of identifying on a display having pixels that are aging due to shifts in one or more aging characteristics of a current-driven component in each of the pixels, comprising the acts of:
measuring, using a measurement circuit, an aging characteristic of at least some but not all pixels in at least a first region of the display using a down-sampling rate of KV×KH, such that the aging characteristic of at least every KVth pixel is measured along a column of the first region and the aging characteristic of at least every KHth pixel is measured along a row of the first region, to produce a set of initial pixel measurements, where KV and KH are positive integers that are identical or mutually distinct; interpolating the set of initial pixel measurements to produce an initial aging pattern for at least the first region; storing, in a memory device, the initial aging pattern; locating in the initial aging pattern using an edge detection algorithm an edge corresponding to a discontinuity in pixel intensity; measuring, using the measurement circuit, the aging characteristic of those of the pixels along the located edge in the initial aging pattern that were not measured in the initial set of pixel measurements to produce a set of edge measurements; applying a scattered interpolation algorithm using the set of initial pixel measurements and the set of edge measurements to produce a refined aging pattern of at least the first region; and storing an indication of the refined aging pattern in the memory device.