Just installed my new Draper 2500 screen! - AVS Forum
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post #1 of 6 Old 12-18-2000, 12:03 PM - Thread Starter
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I've just installed a new Draper M2500 cineperm screen. I've not noticed the vertical streaks that other members have noticed(early days), may be draper have sorted that problem out.

My question is -

I've noticed the middle of the screen is a lot brighter than the rest of the screen( like a big circle), Is this the Hot spotting thing that I've heard other members talk about or can I cure it. Its not that annoying to be honest, I just want to know does every one with a high gain screen suffer this?

My CRT is ceiling mounted by the way.

Any help would be most welcome.

Cheers

Paulh.
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post #2 of 6 Old 12-18-2000, 12:42 PM
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Paul,

I had a Draper M2500 screen, which was from a batch before the streaking problems. It sounds like they sorted out that issue.

What you are describing IS hotspotting, and you will see it with CRT FPTVs and high gain screens. I didn't notice it that much with my first FPTV with 7" CRTs, but when I got a brighter FPTV with 9" CRTs it was more pronounced, as well as some colorshifting.

But from the screen materials that I looked at the M2500 had less colorshifting and hotspotting than the other high gain screens, with the glass beaded screens being the worst, combined with the CRT FPTVs.

After a short while I got used to the slight light dropoff on the picture corners, and I only noticed the colorshifting when watching B&W movies.

Ultimately, the high gain screen was the only way I could get an adequately bright picture on a 10' wide screen without overdriving the projectors, and eventually I moved to a D-ILA FPV to support a larger 1.0 gain perforated screen. But I had been pleased with the M2500 screen while I had it.

-Dean.
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post #3 of 6 Old 12-19-2000, 01:53 PM - Thread Starter
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Thanyou for your advice!

Cheers

Paulh
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post #4 of 6 Old 12-19-2000, 09:37 PM
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Paulh,

If it is an option for you, curving the screen can really help a hotspoting problem. In fact, you should have almost none if you curve the screen in an arc where your projector's position would be the center point of the imaginary circle. If that is too much curve for you, you can always do some sort of compromise inbetween.

Increasing your throw distance can also help.

"Cheers"

-Mr. Wigggles

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post #5 of 6 Old 12-20-2000, 02:29 PM
 
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paulh,

Just curious as to what size you chose?

Bob
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post #6 of 6 Old 12-21-2000, 12:26 PM - Thread Starter
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I bought a 10 foot wide screen. Not that I'm using the full screen, its just that I bought a larger screen than required so im future proofed if I buy a bigger projector.


Cheers

Paulh.
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