EIZO CS2420 calibration – I don’t understand…

[FranzF]

I have an Eizo CS2420 monitor which was hardware calibrated with an i1 display pro. With DisplayCAL I checked the result with the Eizo CS2420 (i1 Pro 2) Adaptive HiRes.ccss correction downloadable from the Displaycal social network.

The result is almost perfect with a white point of 6504 K.

Curiously, I ran another check with another ccss file (Eizo CS2420 (i1 Pro 2).ccss). The result was different mainly for white point. (6654K)

Ok, I thought this wasn’t the right correction. So I restarted the first test with the Eizo CS2420 (i1 Pro 2) Adaptive HiRes.ccss correction.

I was surprised to find that the results did not change with the “bad” correction (white point 6640 K).

Why did this happen? Why didn’t I get the first (perfect) result again?

• This topic was modified 4 years, 1 month ago by FranzF.

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[Vincent]

CCT is not the proper way to address a whitepoint in a monitor. The difference you claim may be much smaller than you think.
Several threads about this, even wikipedia. When displaycal report CCT for white.. it also includes additional info to locate it.

Also instead of trying to figure what those 2 corrections are…plot them with “(i)” button., maybe they are not even close.
Earlier CS2420 are known to be GB-LED, so correction should have an SPD plot close in shape to Dell U2413 default bundled correction in displaycal.
If Eizo changed backlight to another one in latest CS2420 units… ask them.

[FranzF]

I have found WLED in several places, not GB-LED.

Not the white point’s various questions, just to get back to the original correction, repeating the check, and why not the same?

I also attached the correction curves and the measurement results.

Sorry, the last two images have been uploaded twice.

• This reply was modified 4 years, 1 month ago by FranzF.
• This reply was modified 4 years, 1 month ago by FranzF.

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[Vincent]

They’re the same, just do manually dE between 2 measured whites.
And since that community CCSS are both WLED PFS you can use the bundled one (HP Z24x)

[FranzF]

Thank you for your suggestion in choosing the correction file!

However, my question was not answered: Why after half an hour do I get other measurement results with the same correction?

(See Measurement Results Appendices – Only time changed, monitor the correction file is the same and not recalibrated)

• This reply was modified 4 years, 1 month ago by FranzF.

[Vincent]

They’re the same, just do manually dE between 2 measured whites.

Here

[FranzF]

Thank you for your help!

Sorry, I can’t do this, I’m not an expert.

I relied on the software and did not understand the manual changes.

• This reply was modified 4 years, 1 month ago by FranzF.

[FranzF]

Based on the first measurement result, the hardware calibration is flawless and no special profiling is required.

In the second case -as you wrote- I should change manually the DeltaE, I do not understand what happened between the two measurements?

• This reply was modified 4 years, 1 month ago by FranzF.

[Vincent]

Google it, there are online dE calculators. Less or equal than 2dE perhaps?
If you expect that white point drift of monitor itself due thermal/electronics in a CS series + combined operation of an just plugged in i1d3 over time should be better… you’re running low on budget.

Also… it usually does not matter, white point may drift a little as it warms, but in a good display all greys will drift with it so you do not see it because
-it is too small
-relative distance between colors (greys) keep the same

• This reply was modified 4 years, 1 month ago by Vincent.

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