Philips LP2PB201CS - Manual (Page 19)

If the difference between readings at any point of the screen and the reference cen­
ter is found to be greater than 10%, then the display needs to be re-calibrated.
In that case, two different calibration options are avaiiabie:
Local uniformity: this is a quick calibration process; use this option if just one area
of the screen needs to be calibrated.
Global uniformity: this is the complete calibration procedure; use this option if seve­
ral areas on the screen need calibration.
Calibrating the screen uniformity
NOTE: before you attempt to calibrate the screen uniformity, your system needs to
be ‘warmed up’. Do not caiibrate the display unless it has been operating for at least
30 min.
Local uniformity
STEP 1
From the uniformity menu of the 21XLP -2 appiication window select Execute
Local Uniformity.
The screen will turn into a white pattern divided into 25 areas, a dialog box will
appear on the screen and you will be prompted to insert the area number you wish
to calibrate. When done, click OK to continue.
STEP 2
The screen will turn into a full white page; put the Light Probe at the center of the
screen and click OK.
Now the screen will turn into full red, full green and full blue.
Next, you will be prompted to lean the Light Probe on the area to be calibrated.
When done, just click OK and the program will adjust that point to the same value
as measured at the screen center, designated as reference point. This procedure
will be executed for the three RGB primary colors;
NOTE: During calibration you may see that the screen is ‘flashing’. This is simply
due to the high updating speed of the correction system._________________________
The program will then repeat the above described operation for the green and blue
colors.
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White uniformity calibration