Originally Posted by mrtickleuk
I don't know about "safe", but it is a very very bad idea to do this!
When a panel is new, it changes a LOT. But if you are preventing it from doing its gentle daily compensation cycles, you are interfering with this process. Many people have some "banding" which clears up on its own. By blocking the compensation cycles, you are blocking the TV from healing itself.
It's not a plasma, you do not need to run slides on it for the first 200 hours. Watching normal content on it for the first 200 hours before any calibration is a good idea otherwise you would have to re-do to the calibration.
After every 4 hours of power-on time, you should put the TV into standby, with the power still to the TV, and wait for it to do a gentle compensation cycle. There's no need to run slides. Just watch a mixture of content, and always use standby when you finish for the day.
I don't see any evidence that those two things are linked. But it's a very bad idea to run it for 200 hours non-stop.
It is "safe" to operate the television for extended periods at any time, even when new. By safe, I mean it does not compromise the health of the televison and when new, is a useful technique to ready the set for calibration that much sooner. I know this to be case because,
(a) more than one
professional calibrator has indicated (to me) it is. Granted, a pro calibrator could be biased to actually entice a person to do this, but assume for the moment that is not the case.
(b) more than one
electronic repair shops have told me it is safe to leave the set on 20 plus hours a day
(c) I personally have left the set while brand new on 20 plus hours a day and have had no issues.
To your excellent point about the compensation cycles, this is precisely why you do not
want to run the set 24/7 but instead run it 20 hours and then turn it off for a few hours. So that the compensation cycle runs.
Furthermore, at the beginning of the break in process and at the end, one should run the more aggressive pixel refresh, which I'm told equalizes the voltage among all the pixels. Granted, this is not something to do often, but twice (once before, once after break in) is fine (so say pro calibrators).
As to the material to use, a "combination" of material is best. The primary material can be the break in slides. Other material can be normal television. Some content should be HDR where the OLED light is 100, however, the majority of the 20 hours should be with an OLED light setting at 30, so as to not overtax the television.
I can go into even further granularity in this regard, but you get the idea. And, by all means you and/or others are welcome to disagree. But the bottom line is, if one intends to have their television calibrated and wants to wait the 300 hours (not 200) and intends to just use normal viewing habits, it will be months before you can do it, when there really isn't any need to wait that long