A few calibration tid bits.
First, I want to restate something I said last night as I'm going to link this post on page 1 of the thread. This concerns the black level (contrast) of the P60 side by side with the Samsung F8000. P60 dimming is ON.
In a lighted room the F8000 "appears" to have deeper black than the P60. Additionally, the P60 black even looks a tad brownish by comparison. It has something to do with the way the panels filter the ambient light. I'm no video engineer and don't have a clue why this occurs. When the lights are turned off and the room is very dark, the P60 black is black and the F8000 is a dark gray. The perceived contrast of the P60 is much
greater. This alone makes the P60 the better display for night viewing despite shortcomings in P60 color.
Before I get into white balance calibration throughout the luminance scale I want to warn about some "triggers" I found. You probably wouldn't be adjusting in the following ranges but if you do, here's what happens. In the 11 point White Balance module the color temperature will jump to VERY Blue (and increases luminance by about 10 Foot Lamberts) when increasing 100% from Red 11 to 12, Green 15 to 16, and Blue 8 to 9. The same thing occurs at 5% when increasing Red from 26 to 27. The other, and more important trigger for practical purposes, is when switching from dimming OFF to ON, 100% White goes very Bluish. This does not happen from 90% down to 5%.
Here's what the trigger does, before and after.
Grayscale workflow ---
100% must be calibrated with dimming ON because it skews the balance. Do not calibrate 100% with dimming OFF. Set the back light to meet your luminance requirement.
5 - 90% is calibrated with dimming OFF and the back light must be lowered (based on 100% readings) to meet the same luminance requirement. I use the ChromaPure Gamma module where I can watch Gamma and Grayscale simultaneously.
In the ChromaPure Gamma module (figure it out for your software):
1.Turn dimming ON, adjust the back light, and take the 100% measurement only - you've already balanced RGB, or if not, do it now.
2. Turn dimming OFF, adjust the back light.
3. Start at 5% and work your way up adjusting both Gamma and RGB balance at each step.
4. Reiterate as required.
Edit to add: Before running the 11 point, do the 2 point (offsets an gain) using 100% and 30%. Because of the 100% dimming ON pop I came up with Gain settings of 0, -42, and -36, It worked.
So why the big deal about the 100% white balance? The way the eye/brain system works, "white", "true white", is interpreted as being the color balance of the peak (100%) luminance. Perception of lower shades of white (grays) are based on the 100% interpretation. If 100% is skewed to Blue, lesser shades, even if properly balanced, will appear pinkish. The mind plays tricks.
The bluish peak whites make a display appear brighter even though they probably aren't. Manufacturers know this and for the last several years they have set them up this way at the factory (Actually, the Vizio P60 is an exception). When compared to other displays up on the wall at retailer establishments, uninformed customers perceive the blue displays to be the brightest and therefore, the best. We know better, they don't. The customer purchases the pretty blue display.
Hope this helps.
Color calibration: I'm not happy with what I'm getting. I'll be working on Color this afternoon and will report my findings later.