Ruby Color Balance Issue?

So you can't adjust grey scale on the rupee?


Or Convergence???


Or color and/or brightness uniformity for different regions of the screen?


I thought these new pj's would at least have the features of the older models they replaced.


There ought to be a "pro" version of the rupee with some adjustments available for calibrators.


-B

Tim,


This is weird, but on my unit, I get a little pinkish tinge at certain IREs on the gray scale pattern, but its pretty uniform (i.e. its everywhere on that IRE level of the pattern). This using DVI, from the OPPO player. Using DVI again, from my ATI 9800 at 1920 X 1080p60, I get virtually perfect gray scale (no color). Weird. I'm still investigating.


As Tryg pointed out, your screen shots appear to be shading. My JVC G-10 had very slight shading issues, and it manifests usually as color shifting on a 100IRE full field pattern. Is yours only showing up on the gray-scale pattern ?


I think my color tinging only at certain IRE levels points toward gray-scale tracking, whereas yours in "vague" areas of the screen seems more like shading.


The good news is both can be addressed - I would bet Darin is hard at work on these and other issues! (I hope anyway). I also hope that the adjustment procedures / fixes for these issues end up being "open source", so that packing up the unit and $ending it in for a complete calibration won't be the only way to address them. Not that I have anything against that method, but AVS is largely a group of interested DIYers, and sharing the info to get things done has been the hallmark of this forum. I ultimately chose Dilard -vs- a Richard Martin calibration way back when because I enjoyed the tinkering, as I do now. Perhaps WM (I believe the only current calibrator of these types of displays) will produce some DIY tools like he did for the G-xx series JVCs (shading tool, I think it was). I didn't have to use it, but it was reportedly a great tool that got the job done, and IIRC, was priced reasonably.


Bottom line is we may need to wait a bit to get the know-how and the tools to correct some of these issues. It's like deja-vu, because many issues were the same, and it was a very similar situation way back when when I got my G-10. The big difference was that then, they were unusable for HT out of the box. At least now, the issues seem to be somewhat subtle.


- Chris

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10 foot wide. White PVC.


This shot was taken 5 years ago

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Yah know... I'm tired of reading usless, sourgrape infected information. That person who spouts usless information has been added to my ingnore list . Tis the first entry. He should be honored.

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On current production LCOS the old left/right issues have been solved; all current LCOS units use zone shading.


I already have a working tool for SXRD, but it is expensive and not practical for DIY. I've got months of my time invested in learning how to do this, and it takes some expensive equipment as well. I might consider producing a tool similar to the one I did for the G series projectors that allows manual adjustment by selected area, gotta give that some thought...


While I'm on the topic of uniformity, I've seen a few posts saying "no uniformity issues here" or the like. I suspect that in fact if you take measurements you will find that the image is less uniform than you think. In the course of working on this problem I've learned a great deal. One thing that is really quite dramtic is just how much having dead on brightness uniformity, not just color, does for the image. I find most LCOS, and even quite a few DLP, vary significantly in brightness over the screen image. Put up a full field white at 100 IRE and measure the illumination at the screen in the corners, top and bottom center, and center, and see what you get.


William

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Yep, someone else noticed these limitations too! I had assumed that these magnets around the CRT neck/yoke days were just bad, faded memories.

Well truth be known, the magnets are gone, but the same picture quality flaws exist, with the difference being that they are now completely uncorrectable.


ISF calibration ain't going to help either...