What does 720p native on projector mean? - AVS Forum
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post #1 of 10 Old 09-11-2011, 09:23 PM - Thread Starter
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I am not too literate when it comes to projector terms but how can a projector be 720p native yet do 1080p 24/60? i ask this because i am in the market to buy a projector and ran across the runco ls-7. It seems bright, gets good reviews, but it is a 720p native projector. Online projector reviewers claim it will do 1080p, so does that mean it will look as good as...say the runco ls-5 or a jvc rs60? Just want to research every bit I can before i chunk money down on a projector. wish i could see the difference side by side but where i live, no luck Any help here would be greatly appreciated.
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post #2 of 10 Old 09-11-2011, 09:32 PM
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That means that although it can handle 1080p inputs, it will downscale 1080 to its native 1280x720 panel resolution. Runco makes very high quality projectors - but it will not have as high a resolution as a 1080p native projector.
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post #3 of 10 Old 09-12-2011, 07:29 AM - Thread Starter
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Thanks for the reply. So that particular projector, even though it might look really good, it would not be as good as a projector that is a true 1080p? i wonder why they would even put one out like that.
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post #4 of 10 Old 09-12-2011, 08:59 AM
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It's a lot more complicated than that. The LS-7 is a 3-DLP projector, meaning it has the DLP chips, one each for Red/Green/Blue, unlike most DLP projectors which are single chip and use a color wheel (or LEDs) to sequentially display each color. One of the "results" is that they are typically a lot brighter than single chip DLPs. They also don't suffer from RBE, and have several other (less obvious) advantages over single chip DLPs.

But 3-chip, 1080p DLPs tend to start in the $20k+ range, so 720p chips let them get a 3-DLP machine out the door for a much lower budget market segment.

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post #5 of 10 Old 09-12-2011, 09:23 AM
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Quote:
Originally Posted by silver700 View Post

Thanks for the reply. So that particular projector, even though it might look really good, it would not be as good as a projector that is a true 1080p? i wonder why they would even put one out like that.

There's a lot more to picture quality than resolution. Just to name a few, there's contrast, brightness, color fidelity, motion handling. etc. All things being equal, a 1080p native projector will probably be better than a native 720p projector (though even that depends on screen size/viewing distance!), but "all things" are rarely equal.
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post #6 of 10 Old 09-12-2011, 10:05 AM
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It means it has 1280x720 panel resolution. The processor can take a 1080 signal but the output will only be 720 based on the resolution of the panel.

I recommend going and seeing for yourself. Maybe a trip to a nearby city? a few hundred bucks is worth the peace of mind
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post #7 of 10 Old 09-12-2011, 10:26 AM - Thread Starter
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Thanks guys for all the help. I just wish there was a dealer that i could demo that projector. i have looked and no one within 500 miles has one.
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post #8 of 10 Old 09-12-2011, 10:48 AM
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Have you considered the Infocus sp8602 or the new Mits hc7800 with a 6x color wheel. I am RBE sensitive but at 6x we shouldn't see them very much if at all. Even the new cheap Optoma hd33/3300 DLP's have 6x color wheels now. I don't think those RUNCO's can quite get to the LCOS black levels if you are a black-level fanatic, but DLP's have other advantages as you probably already know.

You might be better off with the new JVC RS45 if you are just going for black levels.

To me I'd probably stick with 1080p mainly because of the pixel-fill ratio is higher creating a smoother image, but I guess it depends on your own tastes of course. I think the pixel fill ratio actually helps more than just the resolution increasing, of course depending on how close you like to sit to the screen.

Not sure where you live, but if you really want to see one that bad, you can get airline tickets pretty cheap from some airlines if you buy them (15+) days in advance from a budget airline (jetblue, southwest, frontier, etc..). You MIGHT find a demo store somewhere. Star power in Dallas might have one in the back, but I doubt they have one on current demo (they have one Runco I think on display somewhere, or was that the place in Denver, something like that).


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post #9 of 10 Old 09-13-2011, 09:18 AM
 
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There is nothing wrong wrong with a 3 chip 720p projector. I havent seen one in a while and I dont know how it compares to a single chip 1080p projector, but in its day, they were incredible
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post #10 of 10 Old 09-13-2011, 05:14 PM - Thread Starter
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i may just opt for the runco hb. i need more brightness and although i was considering the ls-7, the hb is 1080p whereas the ls-7 is a 720p.
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