Help with getting correct calibration- Dell U2720Q

[Boyan]

Hi everybody!
Today I calibrated my Dell U2720Q monitor using DisplayCal and afterwards I did a verification and got the following measurement report – attached.

Could you please advise what I could change in terms of settings so my “Measured vs. display profile whitepoint ΔE*00” result is better? Everything else seems great.

I’m using Calibrite Display Pro HL to measure.

Thank you kindly in advance!

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[Ben]

Speed is the only setting that gets better quality with more patches.   What speed is the calibration?    I think you will have to change the black point to get a more even gamma.   Your top end is bright.   You do have good blacks since they higher gamma and not a grey black.    Grey black is adjusted with backlight my way.   White point is off for many reasons.    Red could have barely clipped at RGB 254.   It does that on mine with the true 16 bit 1d lut  to 256×256.   Ive been wondering if a set white brightness instead of as measure would prevent that clip.    Try target brightness to 100 and manualy adjust the brightness to 102 to 105 nits.   It will sacrifice some contrast to .9/2 or .9/5 from what it could be.    That clip is undectable and might not needed to worry about unless your like me and cant stand anything not 100 accurate even if eyes are 75% accurate.    The iTcP is .4 delta e on the white point being being off which is below eye can see.

Gamma starts low numbers in the low end and goes up to 2.4 per spec.      2.4 in spec is not very bright at 100 nits.  2.4 is for HDR in my opinion.    I choose a gamma with black relative and covers a lot of the 2.2 gamma with a low contrast screen like yours.  Mine is 1000 contrast tv.

[Boyan]

Many thanks for your detailed response, Ben!

My calibration speed was medium so next I’ll switch it to slow to get a better result.

As per your recommendation I will also:
– increase brightness to 102-105 nits (with target brightness of 100)
– will set Gamma 2.4 with black relative this time. I am choosing 2.4 gamma as I use my display for color grading video in a dimly lit room.

Will come back with the new report once I’m done : )

Have a great day!

[Ben]

I expect the speed of light to a report.   We do work at the speed of light on the screens.   jokeing.   Thanks for the day off.

[Boyan]

Hi Ben! Attaching the new results – from what I can see – they are perfect! I also switched the correction to  LCD PFS Phosphor WLED IPS, 94% P3 (Panasonic VVX17P051J00 in Lenovo P70) and that also seemed to help my result.

Thank you again for everything!

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[Boyan]

Also just in case for additional info – attaching a screenshot of my Profile self check E*76 report at the end of the calibration:

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[Ben]

Much better RGB gamma tracking on 95 and 100%.   It is perfect.    The correction change was a good idea.     CCMX is inferior to ccss.

Your welcome.

[Author]

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