Wow this is way more responses than I would see on any other forum. I'm very sorry for all the reading, but all of you deserved a reply.
Originally Posted by Chad B
Good post, interesting observations. Assuming you've laid all the correct groundwork (movie mode, dynamic enhancements off, other controls calibrated, using full field or APL patterns that would safeguard against any possible dynamic backlight dimming, etc), then it looks like you would get better balanced results by calibrating at 75% sat / 75% luminance. The 100% luminance result may then suffer a bit, but your overall color accuracy should improve.
Yup I'm in movie mode with all "enhancements" off. 2-point grayscale has a dE of under 2 for all points above 10 IRE and Gamma is between 2.18-2.26. As for full field or APL, the only "enhancement" this display has in Movie mode is it shuts off the backlit when displaying a fully black screen.
Would it not be best for everything to track evenly instead of fixing the values around 75% luma? It's kind of like having a crayon that gives you a different color depending on how hard you press.
Originally Posted by zoyd
yes, nice plots. You should use the term luminance rather than luminescence
. I think what you are seeing is normal non-linear behavior of these displays. You only have 6 points in your "3dLUT" to calibrate and all other points will be interpolated, so the farther you get from your tie points the closer the display will get to native behavior. As Chad suggests you can move the tie points to 75%/75% (saturation/luminance) for example to get better behavior over a larger portion of the gamut.
Thank HCFR for the plots.
Luminance, got it.
Why 75% Saturation? I though you're supposed to set Primary/Secondary colors with 100% saturation?
Speaking of HCFR, thank-you for keeping it up to date.
Originally Posted by PlasmaPZ80U
the EH4000 has a CMS? I wasn't aware of any EH series model that does.
In the factory menu, All the EH Series have:
- Four 2-point Grayscale temperatures adjustments (Cool, Standard, Warm1, Warm2)
- Separate contrast adjustments for each Color Temperature
- Two 6-point CMS modes (Native, Auto)
- Two 6 point saturation adjustments (Native, Auto)
- Skin Hue, Skin Saturation
- 2 Gamma adjustments (1 in decimals, another in whole numbers)
- Y/C Delay Adjustments
- Audio Delay Adjustments
All the controls work as expected except for the CMS. I see you have a EH6030, If you like I could see if I can get you the IR codes for the factory menu and also document all the menu controls I'm sure of.
Originally Posted by Doug Blackburn
.."Traditional" CMS calibration is done at 75% luminance and 100% saturation and those are the only points that get corrected... the corrections applied to those points are applied to everything near them. You only have 6 points where you have proper color. If the TV is non-linear (and they all are to some extent), then the corrections will not be right for other combinations of luminance and saturation (I'm leaving hue out of this as it seems to be less of an issue than the other two, but that doesn't mean it is a NON-issue).
I've tried doing the calibration at 75% and 100% luminance but that doesn't help because the CMS only effects the first 80 brightness levels (35%). As you drift towards black, it has no effect at all! I could set every control to 100,100,100 and it doesn't change anything after you go down to about 50% luma.
I know that this is a low end model (EH4000) which might explain the odd behavior of the CMS controls. But what I don't understand is, if the controls don't work why were they included in the first place? Not only that but why were they adjusted from the factory. Maybe they figure those are the only points reviewers measure. o_0
My question is, how important are the first 80 or so values (155-235)? Should I bother to set the CMS if its only going to effect that small portion? (Remember, the adjustments fade so all 80 values don't get the same adjustment. - See the blue picture in the first post) And if I do set it, should I adjust the xyY of the colors or only the Y?
P.S. How bad of a idea would it be to use a saturation control to increase the luminance of a Blue primary that reads 16% too dark (White: 109.704, Blue: 6.641)?