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I saw an ad for a Hughes-JVC 220SC ILA Projector: http://www.audioweb.com/Ad/AdInfo.asp?adid=90190

I don't have much experience with D-ILA projector as I currently own a 9" CRT Barco 1209, I am very curious about how it stacks up with current DILA offerings.

1) It's out of production so what's it replaced with?

2) How does it compare to a G15 or G20?

3) 1850 ANSI lumens, contrast 950:1 (from the link), native 1600x1200 pixels. What's the pros/cons of this unit?

Time to move from 9" CRT to DILA?

Phil

 

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Hi Phil,


That's no digital projector. In fact, it's a CRT...but it does have some wicked light output, doesn't it? The ILA (Image Light Amplifier) was originally an analog device before the "image light amplifier" technology was made digital.


I don't think that it would work for most home theaters. http://www.avsforum.com/ubb/biggrin.gif

 

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Phil,


We had a 340SC ILA projector at work, and it was constantly being tweaked to give a decent picture.


Years ago these huge, heavy, expensive beasts were the only way to get the high resolution picture of a CRT projector AND brightness over 250 ANSI lumens for non-light-controlled venues like in auditoriums and trade shows.


The D (for "D"igital pixel array) ILA projectors replaced these early models completely except for the ultra-rare 12K ILA FPTV, whose days are now numbered with JVC's new super high-res E-Cinema D-ILA.


Priced at more than a G20, this used dinosaur cannot compete, especially considering that the "bulb" replacement cost is more than most new XGA projectors cost.


With a Barco 1209, it would probably be a step down in picture quality to go with a 220SC, and if you were interested in going with a larger screen (and need more brightness) a G11/G15/G20 would be a better bet.


-Dean.
 

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Phil,


That beast is an ILA not a D-ILA.


The ILA uses CRTs to project an image on the amorphous

silicon substrate of a liquid crystal display or LCD.


The transmissibility of the LCD was controlled by the

electric current produced by the light hitting the silicon.

The light from a powerful lamp was reflected off a mirror

layer which was between the silicon and the LCD.


The ILA is an analog device - the mirror and LCD were not

divided up into pixels.


The D-ILA or Direct-drive ILA, divides the mirror into

pixels, and instead of using CRTs and a layer of amorphous

silicon to generate the control current for the LCD; the

D-ILA has an array of transistors - one behind each pixel

in the mirror. The transistors drive the pixelated mirror

with the control current, directly.


Greg
 

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Wow, thanks for the walk down memory lane. I worked for Hughes-JVC for a few years and this projector was my baby. In fact, I wrote a big chunk of the firmware that was used in it.


Everyone is quick to point out how much better DILA projectors are than ILA projectors and in fact I own a G11 and wouldn't think of a Model 200 or 300 for my own HT. A properly setup and maintained Model 220 SC however, will spank a G11/G15 in every aspect of image quality (contrast, black level, resolution, lack of digital artifacts, lack of pixelation, etc, etc.). Unfortunately, the early ILA's suffer from the same constant tweaking problems that other CRT based projectors suffer from because they use CRT's in conjunction with ILA's.


At any rate, if it weren't for these early ILA projectors we wouldn't have the DILA's that we all know and love today.



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Calibrated G11 DILA, 7' 16x9 Greyhawk, Radeon HTPC, Panamorph (soon), DTC-100, AccessDTV, Lexicon MC-1+, B&W Nautilus 804's, HTM1, SCM1s
 

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I saw a 220SC used with a Faroudja frame doubler, and it was really stunning. But these beasts are quite obsolete now, and the asked price is way to high: $3000 would be more realistic. I know, I have seen a 320 sold at $2000. 40 times less that the price it had been bought 4 years before...


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Robert


[This message has been edited by robena (edited 05-22-2001).]
 

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Mark,


I didn't mean to badmouth the ILA projectors, as they were the king-of-the-hill with the brightest/sharpest picture available for years, for people who needed a bright, detailed picture and had money to burn.


But being that they are quite big, relatively high maintenance, and VERY expensive to repair, they are really impractical for home theater use. Especially compared to the newer D-ILAs.


-Dean.
 

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I also setup alot of ILA projectors... And a properly setup ILA machine (especially the 200 series) will kick the crap out of anything out there. In any image eval category.
 

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Hi Dean,


No offense taken. You are quite correct that a DILA is a much better choice for 99% of home theaters than a used ILA projector.


These older projectors were never intended for home theater use however and were instead geared towards commercial uses such as trade shows, concerts, flight simulators, etc. If I had a huge HT room w/ an enclosed room for the projector and a larger budget for operating costs (power, lamps, etc.), one of these used M200 projectors would be hard to turn down. Imagine the brightness of a G20, but with much better (CRT-like) contrast, higher resolution, no internal scaler artifacts and a complete lack of pixelation.... all of this in an "obsolete" technology lol.


Don't get me wrong, I love the new DILA's. But, DILA's haven't yet come close to surpassing the older ILA's in PQ. The new Q-XGA panels will close the gap however.



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Calibrated G11 DILA, 7' 16x9 Greyhawk, Radeon HTPC, Panamorph (soon), DTC-100, AccessDTV, Lexicon MC-1+, B&W Nautilus 804's, HTM1, SCM1s
 

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Does this CRT / ILA hybrid run with tubes ?? v Bulbs ??


If bulbs (just for laughs) what would one cost ???

If CRT would it be possible to get new tubes and again approx Tube cost ??


I am imagining HUGE maintenance cost and CRT would be out for burn in issues (I do like big screen PC) but how big a budget would you need to put up for a machine like this...


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[email protected]
HTPC without using windows... GUI Front Ends for Home Theater
 

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I was always under the impression that the CRT's used in ILA didn't usually burn-in too badly because they weren't really putting out a lot of energy, just writing the image to the ILA device. Certainly the problem should be much less serious than in a conventional CRT of similar age.


Regards,


Kam Fung
 

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you are correct. THe CRT's in an ILA device run very low intensity as to provide the best possible image. The ILA does the image amplification.
 

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Kam,


I'm not sure how much the M200 lamps are. They probably aren't much more expensive than a DILA Xenon, but that's just a guess.


Also, please don't take what I've written as an endorsement that everyone should go out and buy every HJT projector that pops up on ebay. These projectors are difficult to maintain and who knows what the spare parts situation is on these machines. They are also unworkable for almost all home theaters (with the exception of Bill Gates and the Sultan of Brunei, both of whom bought HJT projectors). The point of my earlier posts is that when properly setup, these "obsolete" projectors do offer superior picture quality.


I am however, quite happy with my G11 DILA http://www.avsforum.com/ubb/smile.gif



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Calibrated G11 DILA, 7' 16x9 Greyhawk, Radeon HTPC, Panamorph (soon), DTC-100, AccessDTV, Lexicon MC-1+, B&W Nautilus 804's, HTM1, SCM1s
 
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