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Calibrating QD-OLED TV's SONY A95K / Samsung S95B - It's Different.


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So I've ordered and prepaid for a SONY A95K 65", ETA August 8th, and have been reading up on how things have been going regarding calibrating these new QD-OLED displays has been going at the AVS forum.

 

Having done my own calibrating for years I've decided I'm going to update my old XRITE i1Display Pro meter as well.......well they aren't even called XRITE anymore, and I know it won't cut it with these newer brighter displays.

And I think I'm going to move to HCFR from ChromaPure software for calibration few reasons....New Meter compatibility being one.

[Not that I dislike ChromaPure, but it will not be getting any more updates, as Tom Huffman, the owner of ChromaPure is retiring, plus he no longer has a software engineer working for him ]

 

I'll PM Tony O'Brien later and ask him some questions, and his recommendation on a replacement meter, but I'm pretty sure he's going to say get either a Calibrite ColorChecker Display PRO of PLUS.

These are basically renamed/branded/updated versions of the Xrite i1Display PRO.

https://calibrite.com/us/product-category/filmmakers/

 

The difference between the PRO and PLUS is the Pro is rated to 1000 nits and the PLUS to 2000 nits, plus both have ambient light sensors and measurement.

 

I have usually bought my calibration gear from Image Science in Melbourne, but I see they are only stocking the PRO version ATM [and the lower version]

I'm unsure if trying to get a PLUS version is needed, as 1000 nits is plenty bright already, something I expect Tony would have better knowledge of and hopefully post back about.

 

Anyway.

It seems some adjustments are going to be needed if anybody intends to try doing their own calibration of a QD-OLED at home with their own calibration gear, as XRITE based meters are currently not getting correct readings.

 

Having seen this sort of thing happen years ago when Samsung changed the pixel structure to a T shape on a range of it's TV's, I suspect the Pyramid like pixel structure of these Samsung sourced QD-OLED panels is causing at least part of the problem.

The added Blue layer over a standard WOLED is also something that is causing problems with readings.

 

What's been going on at the AVS forum is some heavy hitters in the calibration world have been doing calibration tests using the Samsung S95B [They haven't been able to get hold of a A95K], which the SONY A95K uses the same panels.

They have been getting strange results, and to cut a long story short, they have been trying to workout how to compensate for the readings they have been getting.

 

The person that is leading the charge [AVS forum member dwalete  ] has been using some very high spec'd calibration gear [ Jeti 1501 (4.5nm) spectro ] , and is using a Pioneer KURO Plasma display as the Standard to aim for [Next best thing to a old CRT display, which is still the best ]

 

He in turn has made Spectral Data from his measurements available to another [AVS forum member aron7awol ] who has painstakingly tuned this data into a usable .ccss file, so with this data it could be used with the ArgyllCMS-enabled software such as HCFR/DisplayCal.

 

You can read about this in the link below [POST #12,416 - 17th June ] , plus aron7awol has kindly posted this .ccss file as a PDF in the same post, so if you are using HCFR , from my understanding, you should be able to use it as well to calibrate a QD-OLED

https://www.avsforum.com/threads/samsung-4k-s95b-qd-oled-owners-thread-no-price-talk.3240720/page-621#post-61758430

If reading that post, you should really read the several pages before and after it, as it explains how the original calibration took place, and the reason for the choices made

 

Having not used the HCFR software in donkeys years, how one goes about putting the .ccss file data into HCFR so XRITE meters reads more like a US$7000 Jeti 1501 spectro is unknown to me, so if anybody could reveal that and post in this thread, I think everyone else who uses HCFR and intends to calibrate a QD-OLED would find it most helpful.

I know I certainly would.

 

Seeing that HCFR is open source software, I'm hoping that somebody will soon make this process easy, and selection of a preset for calibration of QD-OLED displays will be all that is needed, but ATM that isn't the case.

 

Early days.

 

 

 

 

 

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