besides eliminating rainbows what advantages would a 3 chip dlp have?

colour, brightness and, from what people who saw some of them said, contrast.


So yes, overall better image

Plus, since they need less or no dithering due to the 3-4 times longer display time per color, they have much less dithering artefacts like color banding, false contours and noise.


Atalan

Another big advantage of 3 chip DLPs is at least $35 000 to the manufacturer Also they can do 35 trillion colors vs "only" 16 million that 1 chip DLPs do.

3 chip DLP is sort of the "end all, be all" of Digital projectors at the moment. If a person was allowed to pick one single PJ, regardless of price I guarantee you everyone would pick a 3 chip DLP . Unfortunately there seems to be a large premium paid for DLP PJ's (hence my 2HD).

Well, all DLPs dither because that's how they create color. The 3-chippers don't have perceivable dithering though, which is all that counts. 3-chip projectors usually have slightly worse contrast due to scatter from the additional optical complexity. However, the Marantz VP10-S1 at CES had the deepest blacks I've seen from any digital projector to date. 3-chip DLP has that certain ease of watching that LCD and DILA owners know all about.

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Oops, you'd better pull that guarantee. I'd pick an LCOS-based unit, probably the Sony Qualia 004. And before anyone says it's not available, neither are the 3-chip DLPs shown at CES.

If I remember correctly, doesn't the single chip nature create the high contrasts of current units?

That is, the optics required to split the beam into three and then reconverge the beam actually reduce the contrast level in 3 chip designs. That is one of hte positive aspects of hte single chip system.

You are correct, Dave. Normally, 3-chip DLP designs offer limited contrast (500-1500). However, the 3-chip Marantz at CES was reported as >4000:1 CR @ 1200 ANSI Lumens. This yields blacks in the .3 lumen range. That is pretty good for something this bright.


Hopefully, shipping product will have as good or better measurments and, more importantly, produce outstanding images.

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Hmm... I thought LCOS had similar downfalls as LCD? Although it is admittedly the least researched technology by myself.

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don't know about the convergence, but splitting should not hurt contrast. But I guess what has been shown by the 3 chippers at CES was that it doesn't hurt it

PS I think what happens in reality, the single duty of each chip means that the range of shades increases and so the CRends up being higher


i.e. an RGB color wheel means the dlp spends only 1/3 of its time working in blue, on the other hand on a three chipper one chip spends 100% of its time taking care of the blue.

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even though LCOS and LCD are related and they have some things in common they are quite different. For instance one of the big disadvantage of a LCD is screen door, and that is an advantage of the LCOS

No color wheel = less noise.

"don't know about the convergence, but splitting should not hurt contrast. But I guess what has been shown by the 3 chippers at CES was that it doesn't hurt it"


Well, generally, the more optics you have, the more there is a decrease in the projector.


Don't you notice how, for SXRD for example, they give an "at the panel" contrast, which is reduced when put in with the rest of the optics?


I know for sure that the more optics you have, the lesser the contrast, as there is reflection, difraction, etc.etc... that goes on. Maybe they just got better at it.

I agree, and that is what most of us said. But from what I heard from CES the 3 chips seem to have better contrast with HD2, that is why I made the second comment

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which I will admit is pure conjecture.

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yes, but the optics before the split are just light, so they should not affect CR since there is no CR to affect.

3-chippers are generally always considered to have lower contrast than 1-chip DLP. That said, the Marantz 3-chipper is exhibiting remarkable contrast. While it's not as good as Sharp's 1-chipper, it's still awfully good.

thanks Rogo