Hi,

This is my first time calibrating, I gave my first trial run yesterday and things went kind of strange.

I am following curtpalme.com gray scale calibration guide. Using an Eye-one and the LCD is a Viewsonic N2750 and Getgray calibration disk.

Now I followed the instructions and everything made sense but I think there may be a few issues.

First contrast was set following the guide and it recommended 30-40 ftl for 100% window. When I did my first check the ftl was around 115 but when I adjusted my contrast for this it turned the nice white color to a grey when I reached 40 ftl. I didn't question it and moved on.

Then when doing gray sacle we first start with the 80% window and I found adjusting my Gain R and B weren't working like stated. If I lowered red value it would push the blue down, but if I raised the blue value it would lower its reading and the red. Then if I lowered the blue value it would raise the blue and the red. It almost seemed as if they didn't interact properly, My blue values in Gain were practiacally useless they didn't affect anything but red for the most part. I noticed if I cranked blue up it would look green and it would be red if i turned it down. still not sure if thats how it should be working. But none the less the readings never really changed very much for the blue bar in colormeter HFCR.

Now when adjusting my 30% window with Offset everything was extremely simple to adjust and blue and red both would easily interact together, but this really threw off my blue when returning to the 80% window. And because the Gain B control really didn't do much it was a constant struggle to get that meter at the 100% level reading. Most of the time the only actual way to get the meter to 100% was through adjusting offset instead of gain. I managed to get to a level where things were getting close but it was not looking good on the screen, things just didn't seem to look proper.

I'm really starting to get suspicious of my service menu, they way Gain R B values should interact seem completely different then what was described, almost as if the labeling was wrong in the menu. Also when looking at a steps pattern after all the work my contrast did not look proper at all.

LCDs are usually rather poor at getting a dark black level, so it is possible you might want to go for a higher range like suggested here http://www.avsforum.com/avs-vb/showthread.php?t=852536 and have some light in the room if your Y is really measuring up to around 350. I haven't read all of Kal's guide, but with LCDs you'll generally want to reduce the backlight if the display has one (most but not all do) to dim the screen before you necessarily turn contrast down. Reducing an adjustable backlight will make blacks darker and give you more difference between black and white than if you merely reduce contrast to drop the 100% reading.

As far as your issues with measurements, as far as I can tell I suppose the guess that it has to do with the controls is reasonable. If that's the case then only someone familiar with the display can really help, and I haven't messed with a Viewsonic. On my TVs the high and low grayscale controls have enough range that they are easy enough to view how they work without the meter. For example I can make either the high or low grayscale become clearly red or blue. So by eye I can tell the controls work and the meter merely confirms that yes red or blue measures comparatively high or low in that portion of the grayscale. Because I'm not familiar with your display, the only thing I can think of that could affect the interaction of the control would be color temp. type settings that will also affect the grayscale.

So I attempted calibrating again on a different source VGA (PC) and the B Gain value actually worked properly. Which left me wondering why would my blue value not work properly on Component (DVD Player). Is it possible my TV is the issue and it has a manufacturers defect or could it be the DVD player or cable even?

Also I found my results to sit in a pretty good range but I found still in the black and 10% or 20% range the reds were still rather strong but the rest of my gray scale was sitting in a better reading. Should I turn the R Offset down to clear that up and possibly sacrifice accurate higher gray values in the 40% and 50%? Also my gain seems to go down every time I calibrate. But my before range is usually a lot closer to the 2.2 value, where after I calibrate I'm in the 1's (can't remember the exact value since I'm at work, but could post graphs later). Is there a way to change gain values?

Try posting the actual HCFR files, not just the jpgs, as some experts on here will want to look at various numbers, not just graphs...

Looks like the mid-grays are better, where it's most important. Some feel the I1 can't be trusted and low light levels like where it's showing red taking over, so don't fret too much about that... unless you can visibly see the red taking over in your dark grays/blacks... If you want to try lowering the red-cut to make it better, try it, set it back if you don't like the results...

At this point you may find more benefit from tweaking the gamma if you can...

I have attached the file.
I do notice the red to actually show through in the lower scale. I still need to tweak things a little I think. How do I adjust for Gamma? Since my first readings they sat at close to 2.2 now after calibrating they go down to 1.8.
Again thanks for any input.

Well, I'm not familiar with your set, so I don't know what you controls you have and don't have... again, I hope one of the experts on here will chime in to help...

What I notice is that your white level is still reading 86 ftl... much higher than recommended... not sure everything you tried, but if you turn down the backlight you may be able to increase contrast so it still looks white without being too bright... then other things may be easier to fit into place...
Or you may be misusing the i1 in some fashion... does it require diffusers for LCD? Did you correctly tell HCFR which model of i1 it is and set it to LCD mode?

I followed the instructions of Greyscale for Dummies on curtpalme.com.
The set has very little options to change in the Service Menu. I really can't turn down the backlight or any cms options. Things look alright except for the red being strong in the dark range of 0 to 20% range. I still have some playing around to do, but my hands are tied when it comes to the feature set. Thanks again for your input though.

How do I adjust for Gamma?

Sometimes black-level and white-level controls will have a bit of an effect on gamma, but it's not a given that they will have much effect and would greatly influence gamma. It's quite possible that's just the way the display works if it's like the many displays that don't have any controls to specifically adjust gamma. It is possible to alter gamma using a computer as a source, but I've never actually done that so I'm not sure of the exact procedure. Generally if you had a higher gamma the middle and lower grayscale would appear darker. Basically a higher gamma gives more of a perception of contrast.

What do you have HCFR set to display wise? Are you sure its set to LCD display?
And how is your probe placed on the screen and what probe are you using?

HFCR is setup for Eye one LCD. The probe is an Eye-one LT and its placed on the screen direct contact. I need to try it on some other TV's to make sure it is working properly.