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OK, someone explain tube wear to me.
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Mark_A_W



Joined: 15 Mar 2006
Posts: 3068
Location: Sunny Melbourne Australia

Posted: Sat Sep 12, 2009 10:57 pm    Post subject:

Umm...which 1080i or 1080p? You guys never say.


What about 1080i 120hz versus 1080p 60hz? Eh? Eh?
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Nashou66



Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY

Posted: Sat Sep 12, 2009 11:04 pm    Post subject:

Dave, the reason your image shrinks a bit is the timings are different for 1080i and 1080p. if you go into the sync timing for 1080i and adjust them the image will change width.

Athanasios

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ecrabb
Forum Moderator


Joined: 13 Mar 2006
Posts: 15909
Location: Utah

TV/Projector: JVC RS40, Epson 5010

Posted: Sat Sep 12, 2009 11:07 pm    Post subject:

Mark_A_W wrote:
Umm...which 1080i or 1080p? You guys never say.

Mark, 95% of the time, we don't need to specify which 1080i or 1080p because 1080i/60 and 1080p/60 are the two standards. Standard sources and consumer displays output to- and sync to both those standard refresh rates. It's only when you introduce esoteric scalers and HTPC's, that you need to specify.

Let's put it this way, if nobody specifies a refresh rate, it's usually pretty safe to assume they mean the "standard" 1080i or 1080p.

Mark_A_W wrote:
What about 1080i 120hz versus 1080p 60hz? Eh? Eh?

I would imagine those would be about the same... In theory.

SC
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dturco



Joined: 06 Feb 2009
Posts: 3778
Location: Eastern Shore Maryland

TV/Projector: Runco DLP VX-3000i Marquee 9500 parts doner

Posted: Sat Sep 12, 2009 11:14 pm    Post subject:

O.K. I'll look for that when I redo the 1080i settings. I would like to use my Integra DVD player for upscaling as it has a better scaler built in than the Sony Blu-ray. I had pretty much abandoned the thought of this as it was getting to be a nuisance.

Thanks again.

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Elaine Benes



Joined: 25 Apr 2006
Posts: 1416


Posted: Sun Sep 13, 2009 3:17 am    Post subject:

Line doubled images on graphics grade crt projectors are only using a tiny fraction of the available phosphor, whereas 2500x2000 computer applications are using every available molecule. It would be my assumption that you'd get much faster wear with super high resolution since you're actually using much more of the phosphor.

Also, institutional installations are most often setup for whatever the purpose is, rarely is that purpose to produce a pleasant "image" most often it is to display data, high contrast white or other solid backgrounds with little change or movement, lots of time its just text. If you want a formula for burning tubes quickly, simply set up the highest possible resolution to use the most phosphor, then excite ALL of that phosphor with a solid color background to best display text on, surely you'll burn tubes much faster than if you show video at constantly varying brightness with an infinitely varying background and only actually use a tiny fraction of the available phosphor because your resolution is so low...
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