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Procedure to Calibrate OLED TVs to Meet UHD
Alliance Grayscale Tracking Requirements
•
Set up a test pattern generator to output 10% area (or smaller)
greyscale patterns with a black background
•
Set HDR signaling as follows:
✴
ST.2084 EOTF
✴
540 nits max mastering display luminance
✴
0 nits min mastering display luminance
✴
P3 mastering display primaries
✴
D65 white point
•
Set up a spectro-radiometer or profiled tri-stimulus colorimeter to take
measurements from the screen, using a frustum or contact meter to
avoid ambient light measurements
•
With a 10-bit legal range 668 white patch on screen (563.4nits), use
the TV ‘OLED Light’ adjustment to achieve a luminance of 540 nits.
•
Select an adjustment point from one of the 20 TV Greyscale
adjustment points, and display a corresponding pattern (a table of the
adjustment points and target luminance points is shown below)
•
Make adjustments to the RGB balance to achieve an accurate D65
chromaticity of (x = 0.3127, y = 0.3290)
•
Adjust R, G and B controls together to adjust the output luminance to
the target luminance for the selected point
•
Repeat the process with the remaining 19 adjustment points