How would you know the polarisation of any given location on a screen?
While LCDs have inherent polarisation, small manufacturing variations in the glass, etc, can also cause localised issues with any monitor.
And with projectors, screens can often polarise the reflected light.

And has it been proven the issue is really polarisation only?

Steve

Steve
Hi Steve!
And if I can accurately determine the plane of polarization of the screen, then why can't I use a measuring device?

As said, "small manufacturing variations in the glass, etc, can also cause localised issues with any monitor".
And further, how would do you know the correct probe/screen alignment, even if you know the generic polarisation angle of the screen?

Steve

Steve
If you know how the brightness readings behave with the correct and incorrect position of the device relative to the planes of polarization, you can calculate the correct position.

Steve
The manufacturer of the device can tell us how the brightness measurement parameters of the device behave correctly, depending on the correct choice of the plane of polarization. They can determine this in the laboratory by comparing the accuracy of the brightness and color readings relative to the Konica Minolta CS-3000 laboratory instrument.

No, you really can't, as you do not know what the 'correct' brightness reading would be...
And you do not know what 'polarisation' the probe was being effected by when it was 'calibrated'.
Basically, you have no guarantees at all.
It is why having low polarisation errors (actually, low alignment angle errors of any sort) are important for good probes.

Steve

Steve
Due to the fact that English is not my native language, I cannot formulate my soap more precisely. Based on the behavior of measuring the brightness of the device under test (maximum or minimum values), we can determine the correct choice of the plane of polarization. We only need to find out from the manufacturer this behavior when accurately comparing the measurements of the device with a laboratory high-precision instrument. After all, in fact, when choosing the right position in the plane of polarization, we have the maximum possible effect of the wave of emitted light. This means that there should be maximum brightness measurement values. This is wave physics.

Sorry, as said above that will not provide any guarantees for the reasons stated.
A peak value reading will not be a guarantee of anything.
Inaccurate values caused by misaligned probes or polarisation issues can easily cause +ve errors as well as -ve.
But, if you want to use the probe it is easy to enter the RGBW values into Probe Matching.
Just don't expect any accuracy guarantees.

Steve