Originally Posted by largdiag
exactly. also the colors lenses drops the light intensity 3 x more vs the DLP single panel. Not to mentioned the misalignment issue between pixel cells, especially with the SXRD that causes refraction and the common problem called green glob. WHen they pushed the cells closer together to reduce the SSE the ugly green glob monster appeared.
Whoa there freind. Lots of assumptions there that are not completely correct. Yes, a three chip system does have some drawbacks. But lets look at the comparison without the vitriolic anti-SXRD tripe that you have been spewing.
There are many more components to the optical system that can cause problems, and the light is split to feed all three chips at the same time, but an advantage of 3 times? Not really. The three chip system uses dichoic mirrors to separate out the light into three colors and direct it to the corresponding chip. There is some inefficiency, but not a factor of three. Also, remember, that color wheel is only passing each color one sixth of the time (in the mits sets), so each primary is illuminating the chip on ly one third of the time. At that time it is only passing a fraction of the total light.
As for convergence, good quality control is essential in a three-chip system with no adjustments like is used on the optical blocks in the Sonys. There can be some problems there, but we have not seen them, yet. But then the DLP single chip solution has the color wheel...
Green glob...well, I have not heard a definative explanation and there are likely a number of different problems that have ben lumped into one here. It seems to be similar to lamp issues in that most people don't have a problem, but the ones that do bitch loudly. Color anomolies like this have been well known in 3 chip LCD systems for years, due to lamp color temp variations, filter degradation, thermal sensitivities in various light path components, UV sensitivity, etc. The bottom line is, we have yet to see the problem nor have a single complaint in the sets we have sold. Sharp LCD projectors had dicoloration due to bad spots in lamps years ago that likely amounted to more problems as a percentage of sets sold. Certainly their defective blue filters and poarizers did. We have only seen sporadic problems of that sort with most modern three-chip LCDs and even less with the SXRD.
Your description of "misalignment issue between pixel cells" is completely meaningless and indicates a lack of understanding of how the chips work. Similarly, I know of no evidence that supports the notion that "WHen they pushed the cells closer together to reduce the SSE the ugly green glob monster appeared." If that was true, why do relatively few of the sets exhibit the problem? What is the physics of this phenomenon?
The overall performance of the SXRD and the better DLP systems is similar. I do have a slight preference for the single chip solution because of the simplicity, but the SXRD sets are a fine product and a case can be made for them. They come out of the box looking better than the Mits IME and opinion. After calibration they both perform very well. There are thing to like about both and deficiencies in both.
For those that want the truth, either product performs quite well and has proven thus far to be similar or better in reliability than CRT RPTVs that we have sold for years. In the long run I expect them to be better by quite a margin, for at least two reasons, CRT aging and convergence outputs. The three chip system, whether it is SXRD, DLP, LCD, LCOS, or other variants, will always have the risk of filter and panel damage that DLP does not. DLP has the rotating color wheel and wobulation module as potential mechanical failure points. Only time will tell how they hold up.
We sell both products and work with them all the time. Most folks who know me realize that I don't pull punches when it comes to manufacturers putting out crap or having ineffective service. Sony has had their problems at times, but I have seen no significant and reliable evidence that there is a serious one with the SXRD. If it turns out that there is, I am sure that they will take care of their customers like they have in the past with the PDP panel failures and the flickering CRT sets. Lots of sets as old as 5 years have been fixed or replaced by Sony at N/C. In this way they are similar to Mitsubishi. Both are among the best in this regard, and in terms of service support, training, and service networks.
Now, lets get back to discussing Mitsubishi here. I suggest that everyone start ignoring your posts if you continue.