CurtPalme.com Home Theater Forum

frankthetoad · Joined: 24 Jun 2011 Posts: 4

Ron W · Joined: 07 Aug 2009 Posts: 860 Location: Mississauga

hellbanker · Joined: 13 Apr 2011 Posts: 2

well i tried to calibrate my Sanyo Z800 and i failed miserably. spent an hour to find the setups your measuring software asked for. Absolutely Not recommended for Sanyo Z800!! i could not find squat the software asked for.

frankthetoad · Joined: 24 Jun 2011 Posts: 4

frankthetoad · Joined: 24 Jun 2011 Posts: 4

I decided to do the color calibration today. Here are my DeltaE values using the AVS709 mp4 through my PS3:

R 5.1
G 31.8
B 20.5
Y 36.8
C 9.1
M 14.3

From what I'm reading in this guide...that's pretty awful.

I had a Y value for 100% white of 111.5xx. To get to the 100% saturated red Y value of 23.4xx, I had to set my Color at 39 (out of 100). Seems pretty low. I was able to get my tint set so that I had a cyan x/y of .218/.328. That seemed pretty close. Any idea how I can improve this?

UPDATE. Went into the SM and gave myself a lot more options by changing the model number. My deltaE values are now pretty amazing. Most within 3, one at 7...and yellow at 26. I'm completely stumped as to how to correct yellow.

Sammie2980 · Joined: 26 Jun 2011 Posts: 1 Location: California

First I want to say thanks for the guide. Such a great tool for anyone that is interested in calibration or just to understand what calibration actually is.

I have run through the guide many times, and have calibrated a 3 different displays with it and the results have been excellent. I do have a few questions though.

1st I use 75% windows when calibrating my color. I get the % needed based of 100% white window before I try to adjust for the target Y value of the primaries. Should I use 75% or is 100% ideal since the grayscale ultimately uses the 100% window.

Next question. Is there a general target luminescence for secondaries? If so is there a formula for them suck as you posted for the primaries 71%, 8% etc?

Deinorius · Joined: 29 Aug 2011 Posts: 13

Hi

First of all thanks for the guide. I couldn't have been doing anything without it.

But I still have a few problems. It seems I'm not the only one. I've got a Samsung UE46D7000, it's a LCD LED TV, which got a seperate control for backlight brightness.
So, if I would want to adjust contrast or color with the Luminance, it can only fail. With AVSHD 709 contrast test picture it has to be 95 (now it seems to be the max 100, which is odd). If I set backlight too high... you get the picture.

What should I do, set backlight to minimum?

But that's not the only problem. My gamma is another. It starts high and becomes low. You'll see in my file. Maybe it's because of the contrast, but the gamma control only affects the wohle gamma. No idea how to manage that.

Then there's the color control. You write to set with red pattern 21 % of white pattern Luminance. Well I never get there, not even close. Even with lower contrast I have to set color to 100 where 50 is default.

With the CMS I can adjust every primary and secondary color nearly perfect, but deltaE is still too high because of the Luminance I assume.

What can you advise to me.

**kal** · Posted: Tue Aug 30, 2011 1:38 pm Post subject:

**kal** · Posted: Tue Aug 30, 2011 1:45 pm Post subject:

Deinorius · Joined: 29 Aug 2011 Posts: 13

**kal** · Posted: Tue Aug 30, 2011 3:51 pm Post subject:

I have no experience with backlights I'm afraid so I can't give exact suggestions. Sorry. Manfacturers will do things slightly differently too so it's hard to generalize.

I've given some general suggestions in the other thread you started here: http://www.curtpalme.com/forum/viewtopic.php?p=316169

Kal

brucek · Joined: 22 Jan 2012 Posts: 8 Location: Canada

I read the 'Greyscale & Colour Calibration for Dummies', and decided to purchase the X-Rite Eye-One Display LT from Amazon as recommended for $149 US, and found that they do not ship this device to Canada as indicated in the guide.

After some searching, I was able to find it at NewEgg Canada for $119 C$.

Hopefully, I'll be able to calibrate my new 70" LED display and my two year old LED 52" display without too many problems.

brucek

Justin Fletcher · Joined: 26 Jan 2012 Posts: 4

My apologies if this has been asked before, but I'm unclear on how to search this thread. I'm also hoping it's not an ignorant question. Smile

I'll be using the guide to calibrate a Panasonic Plasma in a room with a great deal of ambient sunlight. I'll be doing a night time calibration at night (obviously), but I was wondering if I needed to do anything differently to get best results for daytime viewing. Should I run the calibration normally during the day? If so, is there a particular time (i.e. when the room is at its brightest)?

If not, what should I do instead? Use different target values? Take the night settings and adjust them somehow? Something else?

This question comes from the first part of the guide where it talks about front projector setups needing to be done in the dark. I just didn't know if something similar applied to direct displays.

Thanks!

**kal** · Posted: Thu Jan 26, 2012 8:32 pm Post subject:

Justin Fletcher · Joined: 26 Jan 2012 Posts: 4

Makes sense. Thanks so much for the quick reply and the amazing guide!

**kal** · Posted: Thu Jan 26, 2012 9:12 pm Post subject:

No problems Justin. Glad you enjoyed the guide and good luck with the calibration!

Kal

chambery · Joined: 31 Jan 2012 Posts: 2

Using a Panasonic Blu-Ray player, the HD AVS709 disc, an i1Display LT and the CHCFR software, I get terrible grey scale readings using the 2 Pt white balance settings. I need to turn Red gain and offset to 50, the highest settings, and Blue gain and offset to 39 and 30 to get the best measured red results in greyscale. Blue and Green are right at 100%. but Red is no better than 90% on any greyscale % step. I left Green gain and offset untouched at 25 per the "Dummy" instructions. Then I tried lowering the Greens and that brought the Reds into line, but I lost Brightness levels. So I reset the Greens to 25.

With these extreme red settings, watching content the PQ is too red with skin tones and solid blacks showing a definite red tinge. I tried lowering contrast which did raise Red readings per the instructions but at the expense of the overall PQ, so I returned to the original contrast setting.

Based on the results, I must 1) have a bad meter (brought new but the "no longer manufactured" date is May 2011 and these meters are said to need periodic re-calibration usually annually) or 2) I'm using the meter wrong. The meter does adheres to the screen on its own, because when hanging it with the weight, it flushes to the screen and creates a suction without any pressure applied. This may have an adverse effect but the instructions indicated to let the meter adhere. I calibrated the meter per the instructions at the beginning of the session. I have the display type set to Plasma vs. LCD. I believe I am following the instructions properly, although I have not advanced beyond Part 7: How does your greyscale look now?

I am doubtful that going to the available 10 Pt after hacking the service menu will overcome this problem if the 2 Pt is so far out of whack.

To my newbie eyes, the PQ looks excellent (although I think a tad too cool) just using the HD AVS 709 disc to calibrate with the user menu controls and leaving all white balance settings at the default of 25.

Settings are Warm2, everything off, etc., all the suggested base settings prior to a calibration with a meter and software.

Can anyone offer any observations based on your experience with the meter, software, setup and instructions? It seems you were able to make everything work to your satisfaction.

Thanks for any help you can offer.

esharmon · Joined: 09 Feb 2012 Posts: 1 Location: Boston, MA

I'm having the exact same problem with the i1Display LT reading too low on the red -- the resulting calibration on my Sharp Aquos LC70-LE632 turn out with everything being red! Any way to re-calibrate the i1Display LT?

Thanks

**kal**

SecondaryColorsSent · Joined: 13 Feb 2012 Posts: 7

Kal,

(1) Can we have the Rec.601 / Rec.709 luminance or Y-values for the Secondary Colors? You listed the Y-values for the primary colors but skipped those values for the secondary colors.

(2) Should I use RGB Limited, RGB Full, or YPbPc YPrPc for the PS3 through HDMI for gaming?
Based on the DVE test patterns, YPrPc provides the most accurate colors ( practially 100% accurate) on my 1st or 2nd generation Sharp Aquos LCD flat panel. But it darkens the screen. I'd have to increase the brightness level so high that that picture becomes washed out in this setting. RGB limited is a nice compromise in color accuracy and brightness, but the green is about 2% off.

My Sharp has a CMS that allows me to adjust the Hue / Saturation / Value of the Secondary and Primary colors, but there's no RGBLowEnd or RGBHighEnd.

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