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SvennoJ on 12 January 2013
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disolitude said:
SvennoJ said:
Mistershine said:
SvennoJ said:
 

It does have to be high lumens though, and 2700 is not very high for spreading it over such a big area. I use 1100 ansi lumens on a 92" screen and the room has to be almost completely dark with a good screen to project on. (no go in the living room)
If that tv in the video is 42", it is projecting at about 140", that's 2.3 times the surface area of 92", or 2500 ansi lumens to work in total darkness. That video might be unaltered, but there must be a pretty powerful projector behind that to be able to capture it on video at the same brightness as the tv with the ambient light level in that room.

Maybe they can build a cheap 480p projector with a standardized lamp for mass production. It won't look as good as in that video but should still give some nice effects.

http://www.amazon.co.uk/Portable-Multimedia-Pocket-Cinema-Projector/dp/B009SIN0I4/ref=sr_1_5?ie=UTF8&qid=1357895225&sr=8-5

Something like this would be ideal. It doesn't need to be powerful or high res to put spots/lines of colour on a wall.

That's not going to show anything on a 140" diagonal, those things are 100 lumen or less.
A low res LED projector is much better for a reasonable price. At 2000 lumens you should be able to get some decent effects at 140" diagonal.
http://www.ebay.ca/itm/HTP-HD-Projector-Model-LED-66-2000-LUMENS-Max-50000-Lamp-Hours-Support-1080p-/300816368392?pt=US_Video_Projectors&hash=item460a0d8308
480p native, 2000 lumens for $220. You only need a short throw lens to get to 140". (Those lenses aren't cheap btw)

I'm positive though that that video was shot with a 4000 lumen projector.

I recently tried this one on an 80 inch screen and it looks wonderful.

http://www.amazon.com/BenQ-W710ST-Short-Theater-Projector/dp/B006ISZM2E/ref=sr_1_15?ie=UTF8&qid=1358032400&sr=8-15&keywords=benq+3d+projector

For something like this Microsoft demo, and a 120+ inch screen I probably would want at least 3000 lumens though.

Yeah at least 3000 if ambient lighting is involved.

I was trying to find a cheap $200 alternative to get some effects showing in a 140" diagonal area like in the video.
That BenQ you linked gives off 64 fL at 80" which is a pretty bright image, more then sufficient to show detail on irregular walls with ambient lighting, and enough to compete with the tv for attention.
A 4000 lumen projector (BenQ SH910) at 140" diagonal comes in at 56 fL, a litle less then the W710ST at 80", should still be sufficient for what that video shows. At 2000 you're down to 31 fL, doable in a completely dark room if you lower the brightness of the tv.

For comparison the SMPTE recommendation for movie theatre screens is 16 fL. I'm not sure how much worse light shows on the average wall, but I guess double that should be a good start for a completely dark room.

Anyway for all we know they could have used an BenQ SH-960 5500 Lumen projector or a laser projector to make that video look good.
A fun proof of concept video, but too expensive for the average living room setup.

Shelf it for when laser projectors come down in price, that removes the problem with focus and difficult setup as well.
http://www.trustedreviews.com/lg-hecto-100in-laser-tv-projector_Projector_review
Now that is short throw :)