Originally Posted by dvzzz Received Elite 70" #5
and green /pinkish blotches continue on this unit too. This time green is in the middle of the screen, and rosy red is on both sides. On top of that, set exhibits fair amount of typical DSE that I did not see before. Best Buy was promising a set from the new batch but I ended up with the set from the same Nov2012 batch and with serial numbers very close together.
A week ago, I started shopping for regular full-array 70" Sharp from a year ago and found 70LE732U from the local guy. I went to see it today and I must say that the screen is perfectly uniform grey, no problem at all. So all that BS about limitation of LCD technology and DSE being on every set that Sharp gave me is just that - BS. 70LE732U is 12 months old set and QC were present at the Mexico facility. I did not buy it because I could not stand the blacks, or lack of black and on top of that viewing angles on the set were really worst that I have seen. Major color shift even 3-4 feet off center.
I am beginning to think that the new batch from Nov2012 may be using a different panel? I have had 3 different 70s in the past 15 months and the first two do not have the green/pink patches whatsoever, perfect uniformity. My lastest replacement set is a Nov2012 received last week and it definitely has green/pink patches. Can you see it most of the time? No. Noticeable when there is content with large white/grey backgrounds. Would I return the set if I could? You betcha. Unfortunately, I can't. I will have to live with it.
Couple of things this new Nov12 set is better than my previous 2 sets. Much better greyscale out-of-the-box on both Movie THX and ISF modes. Also has better color balance after calibration.
Originally Posted by RadTech51
The color problem you're referring to is not really a problem as you put it and would not be something you could see outside of a comparison test unless you are watching very specific source material and have a professional calibrators eye. So the issue effects a specific luminance value that is extremely hard to see outside of a comparison test side by side with a very accurate display. And yes it effects both size Elites.
I don't think Surge was talking about the cyan color issue. The 'latest' color problem is the green/pink patches on the Nov12 sets. So far, I believe all Nov12 set owners have reported seeing this.
Originally Posted by JimP
I realized after I read your post that you weren't trying to show a calibrated gamut.
But this isn't much better. If nothing else, shouldn't 75% saturation be on target all the way around?
I knew someone was going to ask this question sooner or later.
Yes, I could have moved all the 75% perfectly into their respective target squares, BUT that would not have resulted in the best quality image (at least on the Elite).
You CANNOT rely just on charts and numbers when doing a calibration. You will also have to view real world content to verify the calibration produces correct colors output, then adjust the CMS controls accordingly. The Elite does have color tracking issues with most of the colors so when calibrating the set, you will have to average out the range of errors and make sure not one section (ie. 75-100% saturation) is not totally off its reference while sacrificing some error at the middle to lower ends.
The chart I posted also only represent the hue and saturation of the colors, no luminance (the 'value' control in the CMS) values. The biggest challenge is, the Elite's CMS controls are not implemented correctly. Changing hue and saturation for one color may also change its luminance, changing red settings affect magenta, changing blue settings affect cyan, etc. So what I had to do is determine the best settings that averages out the lowest errors, watch reference content, then go back and adjust the CMS again. Painstakingly slow process, but required if you want the best image possible for the Elite.