shorter verison of this post:
In short, I've ended up with RDRV~BCUT=43-27-16-42-26-20 . While I suppose it's possible there may be room for some "refinement", at this point, I can't imagine why, as it looks absolutely beautiful via tests with various test patterns and while watching *real* programming (HD and SD) since last night.
Does seem a little odd my Pic Slider has to be down around "19~20" for my preferred screen brightness level, but that doesn't really bother me any, especially as the same preferred screen brightness level(compared with light meter on Canon Ftb 35mm SLR camera) resulted with factory defaults mentioned below with a pic slider setting of around "23", a difference of only about 4 clicks on the slider. I haven't detirmined the exact SBRT setting yet, but looks like it will probably be 28, or possibly 27 for brightness slider=31. I've only looked at one gamma chart I have on MS (need to check the calibration DVD's), but at this point(and reading those charts "correctly" does seem a bit difficult for me) looks like gamma is at around 2.20~2.27.
So, on my particular KD34XBR960, per some of the below, there *does* seem to be something to setting RDRV~BCUT at mid-range(average 29, total=174) values vs. the "lower" than average settings equivilent to the warm factory offset(equivilent to RDRV~BCUT=32-17-9-32-17-5, whaich was average = 18.66/total 112).
Longer, More version of this post follows, with more detailed info concerning my adjustments for greyscale, and with corrections and or refinement to values/etc. posted concerning my recent greyscale experiments as posted in my last couple of posts in this thread :
I've further refined my greyscale settings experiments per the experiments via comparisions of identically configured Picture modes other than, per pic mode used for the "experiments", making use of RDOF~BCOF (warm/cool) offsets along with the "color temp" user menu choice, and adjusting Brightness/Picture sliders in sepearate pic modes using "mode memory On", so I could keep the other pic mode for comparison with my usual settings (netural color temp, Pic/brightness slider settings as "usual"/etdc) as explained in more detail in earlier posts.
My main focus here was to see, if by either raising or lowering _DRV~_CUT("toghether" with the adjustments necessary) I could improve greyscale and achieve excellent greyscale linearity while at the same time, a preferred color temp without any particular "shade of overall" "weird" looking slight color aberrations occuring throughout brightness range. As, although I've gotten close to that, it has been quite difficult, and seemingly impossible to accomplish this on my set while staying in the same general range for _DRV~_CUT as the factory "warm offset" defaults.
First, off, since my last post, - even though it was VERY linear all the way from 0(or 7.5 IRE for NTSC if you want to get really technical) to 100 IRE -- I noticed via these comparisions to the settings mentioned below that it was quite apparent my previous RDRV~BCUT settings of 32-18-8-23-17-14, were not only on the "cool" side CT wise, it was also slightly -red and, to a lesser extent +blue(or +green a little as well), to the extent of causing a slight "aqua-greensish/bluish" overall color tone to the greyscale. So, because of that, the report I provided in last post which seemed to indicate a greater "difference" needed for +RCUT was erronous.
First, I tried starting by raising to the equivilent of "RDRV=45", and, without spending a lot of time on it, I came up with equivilent RDRV~BCUT = "47-31-20-46-30-23" (note: I erronously reported RDRV as "46" for these settings in earlier post). Having adjusted those fairly quickly for good greyscale linearity, This however resulted in a CT perceivably a bit "cooler" than the settings mentioned above, as well as it appeared, a bit +Blue and +red overall throughout brightness range. To the extent it didn't look promising, except I noticed I had gotten rid of that weird "aqua bluish/greenish" tint to things.
So, I then tried lowering the "equivilent of" RDRV a few "clicks", and adjusting the other _DRV/_CUT as necessary for CT and greyscale linearity throughout brightness range ... From this, I ended up with settings of 43-27-16-42-26-20. Although the method I used to do this was *NOT* to simply "lower" everything 4 clicks from the settings mentioned in last paragraph -- surprise, surprise, I just noticed when writing this post, as it turns out that is *exact* result. In short, with these settings, for *eureka* .. For whatever reason, something "magic" happened, in the sense that the results I have been looking for Greyscale wise all along FINALLY appeared on my screen ....
To me, when Greyscale(and black/white levels are set appropriately, Gamma in range of ~2.20 and and accurate color decoding is occuring) is set "just right", for lack of a better way to say it ... the result I get with real programming appears very "lifelike", or "photo-realistic" across the entire brightness range, and there is no, one apparent color of aberration(any one particular color "standing out" more than others) with Greyscale charts or B&W programming. Or, as another way to say it ... for example, you get the "perfect looking" CT, with Nice Warm whites, and "black blacks" and "pleasing" midtones of (generally) "neutral(but "lifelike looking" if that makes sense) greys in between.
So, next, using RDRV~BCUT= 43-27-16-42-26-20 as "reference", I then endeavored to try to "match" the greyscale with an offset equivilent starting of for instance, "RDRV=32" as closely as possible with a Offset+different pic mode(different black/white level settings per pic/brightness sliders as necessary) for comparsion. Surprisingly, I was able to get much closer than what I had thought was possible before, but still not quite "close enough" per the below settings/info :
RDRV~BCUT = 32-18-8-30-17-11 - This is VERY close to matching overall, however, it results in an annoying "yellowishness", most noticed by my eyes at both higher and lower IRE's.
RDRV~BCUT = 32-17-7-28-17-13 - While this matches in lower brightness levels, extremely closely, mid-High brightness levels(especially High IRE's) look a little "cool", and also are "pinkish".
Noticing that the biggest "change" needed to keep greyscale "close to the same" when "rasing the DRV/CUTS" was a change in RCUT -- I also tried several other settings, using RDRV= 34, 35 and 38 to start with. I didn't spend a lot of time on it(as it seemed unnecessary) but, I could come up with nothing "as good" as either my settings mentioned above starting with "RDRV=32", nor the settings starting with "RDRV=43". HOWEVER, I did notice the necessary larger, change in RCUT(as compared to other _DRV/_CUT settings) which was needed when going between settings starting with "RDRV=32" and "RDRV=43" was needed for these 3 settings in the mid~high 30's for "RDRV" as well. I can't explain at this point why I didn't notice this change between the settings starting with "RDRV=43" and "RDRV=47", other than to again point out, given that I had seen something I didn't like when I first moved the settings that "high", I didn't spend much time with it, and chances are, it may need a little "higher" RCUT as well.
So(and I *did* look closely enough at this this time to feel relatively confident about reporting it accurately) ------ on MY particular set, Between RDRV~BCUT = 32-18-8-30-17-11(or 32-17-7-28-17-13), and RDRV~BCUT 43-27-16-42-26-20, both of which produce VERY similar(but not quite exact) greyscale(linearity and CT wise) given white/black levels are adjusted "differently" accordingly ----- For convienience(in case it's of some use to others, although I think it's probably very doubtful any two sets will track "exactly" the same), The DRV/CUT's "tracked" as follows, and, the testing I did seemed to indicate the same ratio would apply for RDRV~BCUT which also somewhat closely match those greyscale results, with RDRV starting at "34, 35, or 38" (and I expect anywhere at least in the range between RDRV=32 and RDRV=43).
RDRV = +11
GDRV = +9 (or +10)
BDRV = + 8 (or +9)
RCUT = ~ +12 or +14
GCUT = +9
BCUT = ~ +7 or +9