Samsung UE40C6500 calibration

Hi all,
using HCFR software and an eye-one LT colorimeter, I started to calibrate my new Samsung TV, since I was disappointed about its colors fidelity.

It was the 1st time I performed a calibration, so I am not sure that everything is now "quite correct", although I read several guides before doing that. You can find in attachment the "before" and "after" chc files: I would appreciate any feedback from the experts and suggestions on how to improve the results.

Now, some considerations:
a) I was surprised to realize that preset values were "very far" from the actual ones; is it quite common or my TV was very unlucky?
b) In order to tune up the greyscale calibration, I have tried to use the white balancement 10p controls, however they are effective only in the 20IRE-40IRE range. I cannot not see any modification in the upper range. Why? Are you aware of any bug in the Samsung TV software concerning this behaviour?
c) the red color x-y coordinates are still far from the right ones, however I cannot move it to the center since I cannot decrease anymore Green and Blue values on Samsung CMS control. Does it mean I cannot improve it, or the procedure I followed was not correct?

Thank you in advance for any tips.

Best regards.
Roberto

 

SAMSUNG UE40C6500UP.zip 7.2578125k . file

Thanks Michael for your quick reply, firmware is already up to date.

From your last answer I understand that there is no way to move the RED into the "right position", at least with the TV controls I can use. Right?

Looking at the CIE diagram of my "AFTER2" file, do you believe it would be better trying to move up the RED Primary to its target y position (0.330) although it would cause an increase of the overall "distance" from the Reference Value since x value would be decreased?

Regards,
Roberto

Thank you Chad!

Contrast value is now at 77, so I think you are right. In these conditions, luminance value is already 40,4 ftL.

So, do you believe it would have sense to increase Contrast value in order to have 10p controls operating properly?

This evening I reviewed the previous calibration imposing a higher contrast value (lowering backlight in order to reach 40 ftL); I confirm you that in this way the 10p controls are effective! Thank you very much for your help.

However, after a deep CMS calibration (using 100% saturated colors) I realized that:
- 100% saturated colors are almost perfect (very low error, except for red), but
- most of the 50% and 75% saturated colors have very high errors (E=20 or more)

Is there any way to have a good calibration both in 100% and 75%? I use a spreadsheet to calculate luminance/hue/saturation errors using x,y,Y as inputs. However, it works only for 100% saturated colors... is there a similar spreadsheet which could be used for 75% saturated colors? If not, how can I find the correct Y values?

Thank you in advance.
Roberto

I do not have experience in TV calibration, however, looking to the HCFR graphs (see attachment) I am very disappointed about the results obtained on "saturation-luminance" and "saturation-shifts" graphs.

My question to calibration experts is:
- is it frequent to find a so "unlinear" behaviour on colors, or it could be the result of a bad calibration?

Moreover, I have set "Color tone" at warm2 value. However, if I start a new calibration setting Color Tone control at its normal value then white balancing becomes already impossible: blue component is always too high and red component is too low, therefore they cannot be corrected with Gain/Offset controls. Is it normal on Samsung C series LED TV or may be my X-rite i1 LT is not working properly?

Regards
Roberto

 

AFTER 3.zip 4.98046875k . file