hmm, well ive got my setup workin.
5x4 blackout with PVC pipe frame
telex magnabyte m2x panel
and some crappy porta scribe dukane projector
Im pretty happy with the results, but for the most part i have to mess with the color and contrast settings alot. Its either has to bright of whites or its to dark and washed out, and the whole time it has color bleeding on bright red colors. maybe its bright colors in general but iv really only noticed it on reds.
Could any of this be solved with painting the cloth a light grey, or maybe its just because my projector isnt strong enough. I planned on (sometime) making actual DIY and boxing up the panel light and lens etc..
5x4 blackout with PVC pipe frame
telex magnabyte m2x panel
and some crappy porta scribe dukane projector
Im pretty happy with the results, but for the most part i have to mess with the color and contrast settings alot. Its either has to bright of whites or its to dark and washed out, and the whole time it has color bleeding on bright red colors. maybe its bright colors in general but iv really only noticed it on reds.
Could any of this be solved with painting the cloth a light grey, or maybe its just because my projector isnt strong enough. I planned on (sometime) making actual DIY and boxing up the panel light and lens etc..
Doesn't sound like a screen problem. Ok, first question. Look at the panel itself (not the projected image). Is the red bleeding? Are the whites washed out? You could have two problems. There could be chromatic abberration, which would occur from having a low quality projector lens (you said your OHP was a POS). What's the conrast ratio of your panel? That could be a reason for having washed out whites.
ok
here are my panels specs
8.4" diagonal
active matix tft
light brightness: 100,000 cd/m2 max
contrast ratio 60:1 minimum 100:1 typical
640x480 resolution
i havent noticed any color bleeding on the screen itself.
here are my panels specs
8.4" diagonal
active matix tft
light brightness: 100,000 cd/m2 max
contrast ratio 60:1 minimum 100:1 typical
640x480 resolution
i havent noticed any color bleeding on the screen itself.
What about the white/black levels? Are they the same on the panel as they are on the screen. If so, it's an issue w/ the panel, not the screen.
One thing I can tell you for SURE is that the color problems (red problems I mean) have nothing to do w/ your screen. I would bet money that it's your lens.
One thing I can tell you for SURE is that the color problems (red problems I mean) have nothing to do w/ your screen. I would bet money that it's your lens.
hm
im guess its the lens also, other people with this same panel have no compaints. When you say lens, do you mean the fresnel of the ohp under the panel or the 2 ohp one above the panel? I also heard someone saying something about removing the front protective glass piece of the panel to make it more clear and bright, im thinking it might help because i am also noticing a slight shadow effect, on some thing, not to bad, but hard on the eyes after a while.
im guess its the lens also, other people with this same panel have no compaints. When you say lens, do you mean the fresnel of the ohp under the panel or the 2 ohp one above the panel? I also heard someone saying something about removing the front protective glass piece of the panel to make it more clear and bright, im thinking it might help because i am also noticing a slight shadow effect, on some thing, not to bad, but hard on the eyes after a while.
Not sure if it's the fresnel or the projection lens. My guess would be that it's the projection lens. The quality of these lenses varies quite a bit. There are singlet, doublet, and triplet lenses, with the latter being the best. Most OHP's are have a singlet lens, so if you have a cheap one, that's probably your problem. The better the lens, the less spherical and chromatic abberrations. Chromatic abberations are when certain colors of the image stay in focus while others don't. That would explain the "red bleeding" problem you have. It could explain the "white-washing" problem, but that I'm not sure about.
Look at the actual panel, and compare it to what's on the screen. Any problems on the panel means that the projection lens has nothing to do w/ it. It's either the panel itself, the light, or the fresnel. Any differences between the two images could be your screen's fault, but is most likely the fault of the projection lens. Just use process of elimination. Project your image on a wall or a bedsheet. Then you can eliminate the possibility of it being your screen.
Look at the actual panel, and compare it to what's on the screen. Any problems on the panel means that the projection lens has nothing to do w/ it. It's either the panel itself, the light, or the fresnel. Any differences between the two images could be your screen's fault, but is most likely the fault of the projection lens. Just use process of elimination. Project your image on a wall or a bedsheet. Then you can eliminate the possibility of it being your screen.
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