I am being told that DLP projectors, being fixed pixel displays, will not fit a screen perfectly. Can someone please give me some insight on this matter?

Huh?

DLP Chips come in all shapes and sizes. I've seen some distrotion due to poor Lenses, but never due to the panel.

Problems emerge when you use a 4:3 DLP Chip with a 16:9 screen (All 1st gen consumer DLP chips were 4:3) But now most chips are 16:9 and fill a 16:9 screen just fine.

I should have been more specific. I am working with a Screenplay 7200 which has geometry issues. I am being told that all DLP prjoectors have similar, but maybe not as severe issues. Is this a true statement?

What "geometry issues" are you refering to?

When alligning the projector, if you get the top of the image straight with the screen the bottom right corner rounds up and does not fit. I read a review on projector central that agrees with this.

This does happen. Severl installs we have done we have seen this problem. We tought maybe the screens where 100% plum, or the projectors alignment was off, but it was never the case.

We never had a customer complain about it thou, You can get it close enough where its only visiable on the "splash" screen.

Iv only used Screenplay products, so i dunno about other brands.

Never had this problem w/ the SIM2-Seleco or Marantz DLP products I have installed.

jcmitch

What you are discribing is a pincusion defect in the lense of the Infocus screenplay 7200. It has nothing to do with the DLP chip. I haven't seen this on other models from Infocus or Sharp, Marantz and Runco for that matter.

Haven't had the pleasure of using a 7200 yet. We use the Dwin Transvision3 and with the optical shift you can get really close to perfect... the scaler rocks too... check this one out for your next install

Have noticed this problem, but with the proper overscan, it quickly became a none issue, as it occurs just off the screen.

Have ONLY noticed it though IF you crank the zoom all the way out to make the biggest pitcure. Have not noticed it (myself anyway) if you mount the projo halfway between min and max throw, and don't rely much on the zoom.

The ScreenPlay 7200 has Carl Zeiss optics, some of the best in the world, so I would think they are aware of this problem and are fixing it.

I saw the soon to be released 7205 and it's Toshiba twin (Toshiba re-badges, but makes NO changes) at CEDIA. They were unbelievable. Neither presented this problem, so they may have already addressed this.

The Dwin is pretty cool, with a killer scaler...but the price diff is equally as impressive.

avdude

Sounds to me like Infocus is trying to deny or blur the problem with the 7200......

One other way to address the problem is to ALWAYS use screens with the felt on the frame... V-Lux, Lavs, whatever your screen provider calls it, helps tremendously with a smidge of ooverscan.

I have seen a tiny bit of this with a Christie Vivid Red, but overscan solved it. The screen has a 1" border around it, and that was enough.

AVOID the extremes of the zoom range anyway. You will find units vary from one to the next, so I always decrease the manufacturer's zoom range by a couple of inches on each end. It makes sense, too, that the optics could perform better in the center of the zoom range, or at one end or the other; so the best all-around bet is to stick to the middle.

You got that right on the money Ernie. Always optimize any variable you can.

I switched the 7200 with a Sharp 10,000 and it fits the same screen perfectly. The setup is much easier on the Sharp and the picture is great. I don't think that we should need to overscan when the customer is paying 5-10k for a projector. The manufacturer should admit that they have a problem and do what it takes to fix the issue. That is the last 7200 that I will ever sell. Just my 2 cents.....

ISF recommends overscan

The Sharp is 400 ANSI Lumens Dimmer

The Sharp has a slower, 5 segment color wheel (instead of faster six segment)

The Sharp doesn't have Carl Zeiss optics

The Sharp doesn't have Faroujda processing

The Sharp doesn't offer USB or Ethernet capability

ISF recommends overscan (did I mention that already?)

Ever try to shove a large rectangle through a small circular orifice...your bound to have artifacts (Even Runco had issues in the past...)

As previously stated they HAVE admitted, and fixed the problem with the 7205....

with less than ONE HALF INCH overscan, I fixed the problem completely...and on the next job, when I mounted the projector closer to center of the suggested throw, there was no problem AT ALL....

not to rag, as I sell both the Sharp and the InFocus, but I would NEVER recommend the Sharp OVER the InFocus...too much more value in the 7200, especially if you go with ISF guidelines and overscan it a bit...

avdude
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