Originally Posted by Doug Blackburn
Bottom line... plasma TVs have ABL... it is ALWAYS going to be there and will ALWAYS alter what you view in some way. Using patterns that intentionally eliminate ABL from the calibration means you are calibrating AROUND the real-world images plasma TVs produce. I believe the most appropriate patterns for plasmas are patterns that are sized appropriately to get SOME ABL action during calibration though getting too much of it will be problematic. So I still use 10%-12% sized windows with black backgrounds.
This discussion of "What is the correct pattern for plasma?" has been going on for the better part of 3 years that I know of and I've been curious as to when a professional was finally going to come out and say it. Doug, if you have mentioned this before, I missed the post.
Michael TLV has also been trying to get this point across as well over the years, kudos to him.
Standard 10% windows with a black background are the patterns, you want the ABL circuit working during the calibration. I have found that the Chromapure Calibration Disk that Tom had available as a download on his website has always worked the best for me. Simple, straight to the point with an orderly workflow. Forget about the pretty graphs.