Schwa. I am not anti projectors and have owned probably 40 or 50 over my life time including FP CRTs. I don't have an exact count.
I am negative on several aspects of projection. Huge lens shift ranges with cheap ass small lenses. This is not a discussion of lens shift and the bad things it does. Electronic adjustment of improper projector set up. Keystone adjustment. And subpixel hiding of convergence and CA errors. I am sure there are a few more. The category is far from perfect and ladden with cost compromises. BTW I am an engineer as well as a lawyer and I have consulted for various companies in the high end audio and HT industries.
I suggest you do some research right here on AV Science forum and look up a thread called Projector Convergence and an earlier thread called Thoughts about Projector Convergence and Effects on Resolution. You should also read Greg Rogers Review in WSR where he first discussed electronic adjustment of misconverhence. I am sorry that I don't remember which projector but I think its was a Sony Ruby, not sure.
If you put up an on off pixel grid you can see how badly using global subpixel and zonal subpixel screw the patterns up. However, this pattern is obviously an extreme test and not really relevant to real life viewing Say square wave test as an analog test comparison. Real life is bad but not that bad
Zonal subpixel use scaling. Sony uses 1/10 pixel adjustments. JVC uses 1/16. The methods of implementaion are similar I have been told under source confidentuality.
If you can't see misconvergence from your viewing position one should not worry about it. But customers bitch. They go up close and see it and bitch. and return and return projectors trying to cherry pick.
Of course they probaly end up with a worse in other regards sae model but with good convergence.The point is THEY can see it. They need no sophistication to see it up close and bitch.Many post pictures showing blue misconvergence and bitch to high hell.Blue misconvergence is mostly irrelevant to picture quality. Ones eyes are very very insentive to blue as compsared to red or green and misconvergence of blue is usually not visable a short distance away from the screen. Blue also is only a small fractional compent. omething like 8% of white. I hopoe I am saying this correctly. In the old days of CRT FPs we usually defocused blue because of limitations in the output of blue tubes at higher IRE levels or drive levels, defocusing improved the gray scale by allowing for a straight color temperature liner. The defocus was not visable a small distance away from the screen. But idiotic consumers and many many calibrators, who didn't know what they were doiung, would refocus the blue and tell their customers, seee I made your projector better, but in reality all they did was screw up gray scale performance.
I frequently dis cuss with industry professionals the bitch about blue misconvergence here on AVS. And they just laugh at how it makes no difference. It doesn't need to be addressed. The solution is to just let the customers hide it. like an ostrach hiding itshead in the sand. Whatever.
Subpixel was added to shut customers up. To fix it not by fixing it but by hiding it and most viewers simply aren't knowledgeable or sophisticated enough to see how the picture has been degraded. All they see is no more misconvergence. Hikus pocus the manufacturers have done a sneaky trick and hidden. You research it. Read about. Call your JVC engineer. Did he design it. Ask him to explain how it works and whether it say err duh makes the converged lines less sharp. Ask him. Ask hime if it cost you pixels. Ask him.
THE COMPANIES ADDED IT FOR ONE REASON. To stop complaints and returns. And it has done that very much.
Go do the reading. I am simply not going to say more. You can have the last word. This is not a new subject. Like I say enjoy using it if you think it provides a net improvement. And go to bed thinking that you are right. Hug that JVC engineer Teddy bear. (I hug my dog and my wife). Whatever makes you happy. What you like is all that counts, really. Being wrong hurts no one. But in my opinion you are wrong and nothing will change the facts on which my opinion is based.After you do the reading, I would be happy to discuss this with you by phone but I am not going to post more information when there has been full discussion of this issue before.
I get tired of people not doing research and starting discussion over as if it is something new. I am talking in general and not about you. you are clearly offering your observations and relatig an what i would call a not complete answer given to you by JVC. As one gets oilder, it is hard to keep answering the same questions over and over and arguing points when ones position is correct and nonarguable and I choose not to engage further With respect to adjusting red misconvergence or CA to green as the reference, ther may be instances where one can see on say let crawl on ESPN bottom info line red misconvergence and using subpixel in specfic screen areas, score boxes, etc may indeed be net benificial focus and resolution are not important there. the letters are big. Red misconvergence there can be very annoying. Just like some of my posts. Edited by mark haflich - 2/5/13 at 3:22pm