Re-interpolation with edge detection for extracting an aging pattern for AMOLED displays
First Claim
1. A method of improving image uniformity of a display, the display comprising a plurality of pixels, each pixel comprising a light emitting device, the method comprising:
- measuring a pixel characteristic of each pixel of a coarse subset of the pixels to produce initial pixel measurements;
determining at least one local maximum of a gradient magnitude of the initial pixel measurements;
measuring the pixel characteristic of one or more pixels within a local vicinity of the determined at least one local maximum of the gradient magnitude to produce additional pixel measurements;
updating an estimation matrix stored in a memory device based on the initial pixel measurements and the additional pixel measurements; and
compensating an image of the display with use of the estimation matrix to improve an image uniformity of the light emitting devices across the display.
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Abstract
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.
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Citations
13 Claims
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1. A method of improving image uniformity of a display, the display comprising a plurality of pixels, each pixel comprising a light emitting device, the method comprising:
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measuring a pixel characteristic of each pixel of a coarse subset of the pixels to produce initial pixel measurements; determining at least one local maximum of a gradient magnitude of the initial pixel measurements; measuring the pixel characteristic of one or more pixels within a local vicinity of the determined at least one local maximum of the gradient magnitude to produce additional pixel measurements; updating an estimation matrix stored in a memory device based on the initial pixel measurements and the additional pixel measurements; and compensating an image of the display with use of the estimation matrix to improve an image uniformity of the light emitting devices across the display. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification