Originally Posted by vidguy_1
What is considered "unacceptable" convergence for these sets?
I feel my set is a little too soft.
I've just checked the convergence using the built in crosshatch, I've tried all increments, for the horz.. but of course when I get the top or middle matched.. the bottom is off, and vice versa.
As well, one side matches up, while the other side will show more error.
I's bad enough, that currently, I can see the mis-convergence from 8 feet away on the crosshatch. (50 inch)
Is this considered "normal" for the A2000? , accept this as is.. or is this an example of a "bad" set (Jan07)
Personaly, I think if I can see the red fringing on a crosshatch pattern at 8+ feet.. it can't be considered normal, can it???
I will save Dave Hancock the trouble of typing all this in again.
I had a similar beef (I can see the misconvergence from 8' away, especially on a 2.35:1 movie as the problem is worse near the top at bottom) and this was the extent of my questions and his answers:
RaptorX: My 50" SXRD has a convergence problem. From what I can tell, they all do, to some degree. Adjusting convergence in the service menu doesn't help, as it varies across the screen and you can only move one pixel at a time (you need like half-pixel increments and a way to alter 'zones', or something).Dave: As other's have pointed out, it is pretty normal (actually, your's might be a little better than most).
RaptorX: So, do I live with what I have? Crosshatch patterns have red edges on the left and top and green edges on the bottom. A one-pixel black and white pattern looks pink. If you look close (2-3 feet) during credits, you can see the colored halos.
I checked a floor model in a store and it was similar.Dave: Yes, if you want the features that the SXRD delivers (good blacks, smooth image, no rainbow effect) then, sorry, you will have to live with it.
RaptorX: Forget the halos for a minute, since I can't see them from my viewing distance. However, if I have .5 pixel misconvergence, isn't my clarity suffering?Dave: No, the human eye can't see detail in color - so a slight misconvergence cannot be seen from any reasonable distance. BTW, while HD broadcast luminance information is 1080 x 1920 pixels, the color information is only 540 x 960 pixels (for 720p it's 360 x 640). So, in the real scheme of things a 1 or even 2 pixel misconvergence is "in the noise".
RaptorX: Why drop over $2000 for a 1080 TV if you really can't notice .5 or 1-pixel misconvergence?Dave: Historically, $2K is not that much. Absolute pefection in HD has never really been achieved - even at over $10K!
RaptorX: I bet a perfectly aligned 720P has a better picture than a misaligned 1080P.Dave: OK, but the pixels on a 720 set are 50% bigger than on 1080 - so with the same amount (measured in mm) of miscovergence would be a lot less on 720. As Waldorfsalad suggests, going to a single chip display (DLP) is the only way to get perfect convergence (even LCDs & Plasma's have misconvergence - because the 3 colors are physically separated from each other), but then you have the other issues (RBE, potential viewer fatigue, etc.). NOTHING IS PERFECT, it is a matter of trading off pros and cons.
RaptorX: Here are the files that I posted a while back. My only response was 'yes this is misconvergence, call Sony'.Dave: Well sorry, that response was wrong - it is well within manufacturing tolerances.
Dave Hancock SARA 126.96.36.199