Originally Posted by leggoslave
I get all that hence me keeping RSTP at default for the card at 31 (pre-reset value was actually 63) which gives me the potential adjustment to lower RSTP as the set ages again. If I have it at 1 now what do I do when the red tint returns bar resetting again..which I don't ever want to inflict on this set again. Look I'm happy with the slightly red tinted 0 IRE but what makes it stand out more is that the next band up is green tinted. Putting up a grayscale/gamma ramp makes it all very clear where the errors are.
Re. Calibration, I have the same meter btw, and the MLL is definitely readable with SAD over 200. Now at 160 it is unreadable.
I'll be interested to see how you go with the calibration though. Keep us posted.
I found some time over the weekend to calibrate my 141fd.
Prior to diving into calibration, I verified voltages and measured black level. With SAD at 198 and RSTP at 1, my i1 Display Pro 3 measured black level at .0012. If I lowered SAD to 188 (which my panel can handle, but causes some magenta lag) black level lowered to .0008. I previously owned a different 141fd that had no red tint (until hours reached approximately 11000) and whose voltages were tweaked but pulse meter NOT reset, and its black level was unreadable by the same meter. With all voltages at default, black level was .0012 on that panel. I decided to leave SAD at 198 because of the stray magenta lag. Remember, my strategy is to accomplish a red tint and artifact free picture and not push the panel beyond its limits with regards to black level.
Calibration was par for the course for any Kuro calibration - smooth sailing. However, my eyes and meter did notice the green push on 10 IRE. I noticed that gamma at 10 IRE was at around 2.13. I had to set it to -1 to get it to 2.20 on ISF Day and -2 to get it to 2.24 on ISF Night. Overall gamma on ISF Day was 2.21 and 2.24 on ISF Night. Correcting gamma had a positive effect on the aforementioned green push, as it was less noticeable to my eyes and was confirmed by the meter as green was closer in line to red and blue. This side effect is preferable to red tinted blacks IMO.
The AVSHD709 black clipping pattern was dramatically more neutral gray compared to the red and clipped mess that it was when the pulse meter was freshly reset (all bars were red at that time). 5 IRE still had a slight red push to it, but, again, not as severe as when the pulse meter was freshly reset.
I put up my current go to torture scene (Star Wars The Force Awakens when Kylo Ren and the General meet up with Supreme Leader Snook). Compared to when the pulse meter was first reset, near black details were dramatically more visible and the previously mentioned side effects (red and green tinge to low end grayscale) were not noticeable at all. Fresh off a reset, this scene was a black clipped red tinged mess.
There is a natural desire to lower SAD for lowered black level but I'm going to let it be, as the picture looks very clean, especially near black and shadow details, and an idle black field looks completely even with no dark blotch in the middle. Perhaps more wiggle room for SAD will be available as the aging algorithms continue to do their thing.