any "lightboost" function for projectors?
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does a glass bead screen have poor contrast? i read that the blacks appear as a light grey :/
does a glass bead screen have poor contrast? i read that the blacks appear as a light grey :/

#16
Posted 05/06/2014 06:25 AM   
With a high gain screen, contrast is unchanged. Everything is just brightened by the same factor. So for example with 2.0 gain, your whites are twice as bright, and your blacks are twice as bright too. Technically it hurts your absolute black level, but because the contrast ratio between brightest white and darkest black is the same I find it's not noticeable. If your main problem is that the image appears too dim, I don't think you can go wrong here. For cleaning the screen, I've heard that denatured alcohol is the best. I've just used a bit of water when I've needed to clean a spot, though it can take a little time to fully dry. I think the key is to just not be rough with it. I don't really know about rear projection. I doubt contrast is affected though. The one way you can improve contrast with a projector is to reduce reflections in your room. If your whole room is painted white, then light from the screen is going to bounce off the walls and light your screen, reducing contrast. It's the same reduced contrast you'd get with a light turned on. Some people repaint their room to a darker color. Those who can't repaint can try to hang things on the wall near the screen or throw down a rug on the floor. My room is brown to begin with, so I was lucky!
With a high gain screen, contrast is unchanged. Everything is just brightened by the same factor. So for example with 2.0 gain, your whites are twice as bright, and your blacks are twice as bright too. Technically it hurts your absolute black level, but because the contrast ratio between brightest white and darkest black is the same I find it's not noticeable. If your main problem is that the image appears too dim, I don't think you can go wrong here.

For cleaning the screen, I've heard that denatured alcohol is the best. I've just used a bit of water when I've needed to clean a spot, though it can take a little time to fully dry. I think the key is to just not be rough with it.

I don't really know about rear projection. I doubt contrast is affected though.

The one way you can improve contrast with a projector is to reduce reflections in your room. If your whole room is painted white, then light from the screen is going to bounce off the walls and light your screen, reducing contrast. It's the same reduced contrast you'd get with a light turned on. Some people repaint their room to a darker color. Those who can't repaint can try to hang things on the wall near the screen or throw down a rug on the floor. My room is brown to begin with, so I was lucky!

#17
Posted 05/06/2014 06:47 AM   
[quote="sleepwalker2"]projectors really ought to implement lightboost to keep the lenses open longer. because as far as i'm concerned the 3d content is far too dark, just like 3d vision 1 monitors. it doesn't matter how "bright" the projector is if the lenses are still being closed the same amount of time. the darkness makes me want to switch back to a lightboost monitor. this idea of keeping the lenses open during the same frame that the projector screen is blank or black should be easy/simple enough to implement and sync with the glasses.. making this same change in a monitor is of course more difficult, requiring hardware changes. i will suggest that projector lightboost can be accomplished with software alone and that nvidia should look into creating it to be applied to all 3d vision projectors. this idea should be bounced off the nvidia 3d vision devs if it for some reason has not already[/quote]The only problem here is that the projector is already producing as much light as it can. Lightboosting an LED works because you can flash/strobe an LED beyond its normal spec, because you know it will be off for awhile and thus not burn out. Projector lamps are just on, and there is no way that I'm aware of to strobe them temporarily brighter. It's not a question of the glasses being open longer, they are already at maximum before the LCD in the glasses themselves can start to cause ghosting. Dumb question here- have you adjusted your projector settings? Out of the box, the default settings pretty much suck for 3D. If you haven't calibrated your projector, you can have this sort of problem.
sleepwalker2 said:projectors really ought to implement lightboost to keep the lenses open longer. because as far as i'm concerned the 3d content is far too dark, just like 3d vision 1 monitors. it doesn't matter how "bright" the projector is if the lenses are still being closed the same amount of time. the darkness makes me want to switch back to a lightboost monitor. this idea of keeping the lenses open during the same frame that the projector screen is blank or black should be easy/simple enough to implement and sync with the glasses.. making this same change in a monitor is of course more difficult, requiring hardware changes.

i will suggest that projector lightboost can be accomplished with software alone and that nvidia should look into creating it to be applied to all 3d vision projectors. this idea should be bounced off the nvidia 3d vision devs if it for some reason has not already
The only problem here is that the projector is already producing as much light as it can. Lightboosting an LED works because you can flash/strobe an LED beyond its normal spec, because you know it will be off for awhile and thus not burn out. Projector lamps are just on, and there is no way that I'm aware of to strobe them temporarily brighter. It's not a question of the glasses being open longer, they are already at maximum before the LCD in the glasses themselves can start to cause ghosting.

Dumb question here- have you adjusted your projector settings? Out of the box, the default settings pretty much suck for 3D. If you haven't calibrated your projector, you can have this sort of problem.

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#18
Posted 05/06/2014 07:14 AM   
do you advise against getting a projector screen without the common inch or so of black bordering on the edges? rather, the absolute edge of the material will be projected onto.
do you advise against getting a projector screen without the common inch or so of black bordering on the edges? rather, the absolute edge of the material will be projected onto.

#19
Posted 05/06/2014 07:32 AM   
My screen doesn't have any bordering and it doesn't bother me.
My screen doesn't have any bordering and it doesn't bother me.

#20
Posted 05/06/2014 08:00 AM   
what about a high contrast screen? would you say this is a better thing or not?
what about a high contrast screen? would you say this is a better thing or not?

#21
Posted 05/06/2014 01:26 PM   
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