I have a 2012 Samsung ES8000 LED/LCD which I have gotten good results with. I basically followed the curt palme guide here - http://www.curtpalme.com/forum/viewtopic.php?t=10457
A few things to think about for that are:
- If you are going to use movie mode or any mode with 10pt white balance controls, calibrate your gains at 100% or 109% white (depending on if your are clipping wtw or not). Experiment and see if you get a flatter gamma to start with by calibrating offsets at 10%, 20% or 30%.
- If you are setting backlight for a pretty low light level, check against a higher backlight level to make sure you havent gone too low and are hurting white balance.
- When calibrating 10pt white balance, your contrast control may impact the usefulness of 10pt controls. On my set I have to have contrast at 100 for the 10pt controls to work as intended. See here for details: http://www.avsforum.com/t/1508580/luminance-gamma/30#post_24147518
- Turn off all dynamic contrast/etc controls. None of them do a very good job at improving calibrated accuracy (your appreciation of the impact on picture quality is another matter)
- bt1886 gamma target is most certainly a good thing.
For CMS calibration I followed this guide - http://www.avsforum.com/t/852536/basic-guide-to-color-calibration-using-a-cms-updated-and-enhanced
My TV has RGB controls and what I found worked best was to put up reference colors using the "test color" function in HCFR and entering live reading mode and adjusting CMS controls so that the RGB live readings came into balance. I did the same for white balance as well, run a grayscale run to generate target Y's and then go into live reading mode and balance RGB to target Y.
If for some reason you don't want to use the HCFR view images generator, you can use the AVS 709 mp4 files ( http://www.avsforum.com/t/948496/avs-hd-709-blu-ray-mp4-calibration
), the GCD calibration mp4's ( http://www.avsforum.com/t/1406352/gcd-gamut-calibration-disk
) or any other free or non-free disc.
As to whether you should focus on 100%/100% or 75%/75% color sweeps, I did both, looked at average dE across all saturations, and basically took an average of the settings which gave best 100% measured results and best 75% measured results to arrive at a set of settings which gave me lowest average dE overall.
Using the above I got a very good result.
If your LED has a mode that has non-defeatable backlight dimming (Standard mode with "microdimming" on my set), gamma calibration be a little tricky. I have approached it a few ways.
First, using full field patterns for calibration, and measuring results against full field patterns got me a pretty good result, although it might not be the best approach overall as the backlight dimming has a pretty big impact on the measurements. You can see full details of my Standard Mode calibration in this post - http://www.avsforum.com/t/1399319/official-samsung-unxxes8000-owners-thread/11940#post_22933867
I also talk about the PQ impact of some of the dynamic picture options in the link above as well.
If you want to go a step further, consider using a 3dlut either through madvr ( http://www.avsforum.com/t/1471169/madvr-argyllcms
) or an eecolorbox if you dont have an htpc.
Using a 3dlut on movie mode completely eliminated all measurable errors to below a perceptible level for me. However my set has a moderate amount of flashlighting so I really wanted a calibrated mode with backlight dimming, and I am unable to disable the dimming for calibration in Standard mode.
First, here's the results I got using the controls on the TV and full fields for calibration and verification
Standard mode calibration, TV controls, full field calibration and measurement (Click to show)
Using the madvr and argyllcms software linked above I compared generating 3dluts for various combinations of Standard mode pattern generation and profile verification. Considering that the backlight dimming is active when full fields are displayed for measurement, I thought what if you could largely eliminate backlight dimming from the equation by keeping a constant and high average pixel level in the patterns? MadVR doesnt support APL patterns in the MadTPG pattern generator, but it does let you measure a 10% window, and set the brightness of the border to 100%. Overall it seemed with the 100% white border that the backlight dimming was largely eliminated regardless of the % brightness interval being measured.
Standard mode calibrated using full fields compared against Standard mode calibrated using 10% windows, 100% white background (dotted line, yellow markers), full field pattern verification
dE method is cie76 with absolute Y w/ gamma enabled.
comparison of standard mode calibration methods, full field verification (Click to show)
Using full field verification, Standard mode full field 3dlut has an avg 2.3 gamma, while the window calibrated 3dlut is about 2.2 average.
RGB balance is very close between the two, dE on both approaches is low, although the window calibrated lut approached dE of 2.5 at 10% black
Primaries and secondaries and saturations are very good across both approaches. I set my TV to "native" colorspace which seemed to have some problems with the 100% primaries. I may go back and recreate my 3dluts in a different colorspace setting, but all dE's are low enough that I dont think its worth it.
Second test is Standard mode calibrated using full fields and the same 10% windows above, but verified against the 10% window patterns. In theory this might more closely represent the picture reproduction of the TV in real content.
comparison of standard mode calibrations against window patterns with 100% white background (Click to show)
Same comparison as above, the dotted line on bottom is the window calibration. The full field cal has avg 2.3 gamma versus avg 2.2 gamma for the window calibration.
RGB balance is excellent on both. The window calibration measured against window patterns has 0.2avg dE. The full field calibration is higher at the lower end, but still completely acceptable.
Primaries and secondaries were nearly identical as the prior test.
Here's my hcfr chc files if you want to see the differences in 3dlut calibration between movie mode (no dimming), and each of the standard mode calibration and verification methods I used:
moviemodefullfieldresults.zip 4k .zip file
stdmode10pcwindow100brightcal-10pcwindow100bright.zip 3k .zip file
stdmode10pcwindow100brightcal-fullfieldresults.zip 3k .zip file
stdmodefullfieldcal10pcwindow100brightresults.zip 4k .zip file
stdmodefullfieldcalfullfieldresults.zip 3k .zip file
Overall, it doesnt matter which mode you use, you will get an excellent result. Don't shy away from a mode which has non-defeatable backlight dimming though if you prefer dimming to flashlighting and clouding. It looks like the only real adjustment you need depending on which calibration and measurement method you use is to just adjust gamma by +1 or -1.
That was pretty much my complete process, hopefully that was helpful.
:edit: yes, use a meter correction file. Try the WLED correction file. If after you are done calibrating and it looks way off, it may not have been the right one.Edited by 10k - 1/13/14 at 7:49pm