Author Topic: Digital Projectors  (Read 324 times)

Offline wheelee

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Re: Digital Projectors
« Reply #20 on: April 12, 2017, 12:56:37 PM »
Oh BTW the 3D is awesome on these, it's like - in your face lol
it uses active 3D glasses that needs to be powered on.

Offline wheelee

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Re: Digital Projectors
« Reply #21 on: April 18, 2017, 09:09:09 AM »
tried to look for a 300" wall last night & this is what I found around our factory, talk about portability  B)





NEW H1"S"
http://bbs.xgimi.cn/forum.php?mod=viewthread&tid=110452
 
https://item.jd.com/4860246.html

https://mall.jd.com/index-1000000582.html

Offline wheelee

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Re: Digital Projectors
« Reply #22 on: May 11, 2017, 07:17:58 PM »
here's a nonsense test done on a $5 tarp with different shades
Luckily the other side was a non-reflective surface which can be used in lieu of a white flat surface.

I really have no idea about this test but it seems that the yellow/ bright shade will be more view-able with the lights on although the dark shade area have more contrast, size about 75 inch

ordered from a tarp shop with different shades made in MS Paint


with Light ON


Lights OFF


Luckily the back is non reflective but they say reflective is much better


Lights ON


Light OFF, pictures are much better than the one taken from a cam phone

Online splerdu

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Re: Digital Projectors
« Reply #23 on: May 16, 2017, 04:36:32 AM »
^ A good screen can make a huge difference in picture quality. I use a low gain screen at home, makes black levels and shadow detail much better even on my rather dated projector. When the lamp dies i'll probably get something like your XGIMI.


Test image shot in darkened room using Galaxy S4. Camera is terrible at low light shots, the gamma bars are actually discernible all the way through.

For your PJ i think low gain is also the way to go. Your max brightness is high enough that it won't be a problem getting good white levels even on a gray screen, and it'll make contrast and black levels better.



"I refuse to prove that I exist," says God, "for proof denies faith, and without faith, I am nothing."
- The Hitchhikers Guide to the Galaxy, Douglas Adams

Offline wheelee

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Re: Digital Projectors
« Reply #24 on: May 19, 2017, 10:43:53 AM »
for the mean time I usually just use the wall that's painted like milky white & I place a pure white paper in between & you can really see the difference. What are those grain thing like 0.8 or 1.0?

anyways I had a chance to try this little thing outdoor last night since I came back to the factory late & not a lot people around
just wondered how it would look like on a huge wall though not totally dark coz of the street lamps, The Cc would be a little brighter if plugged in.
i guess the Cc was more than 10 meters away from the wall, not sure how big the screen is though.







Online splerdu

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Re: Digital Projectors
« Reply #25 on: May 19, 2017, 11:00:03 AM »
^ Not 'grain', but gain, which tells you about the screen's brightness

1.0 will be a white wall
below 1 will be grey
above 1.0 will be a different material that's more reflective

Low gain screens can give you better black levels.

There are also ambient light rejecting screens where the material is designed to absorb or diffuse light coming in at an angle (ambient), while reflecting direct light (coming from projector). These can make for a good picture even if the room isn't dimmed.

Like so: (undarkened room, regular projector screen top half, ambient-light rejecting screen bottom).


The el-cheapo screen I have: https://www.youtube.com/watch?v=QDmyhQdFF0U



"I refuse to prove that I exist," says God, "for proof denies faith, and without faith, I am nothing."
- The Hitchhikers Guide to the Galaxy, Douglas Adams