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Topic: Light extending past my screen edges?
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Joined: Jan 6, 2015
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This is probably a pretty basic question but I'm not sure how to phrase it, so I'm having a hard time searching it.

Silver Ticket screen with thin bezel (1/2" black frame) 1.1 grain.
I have set the Optoma UHD50X projector using the test pattern so it fits well.

When watching a movie there seems to be some light that extends past the edges of the screen almost forming a perfect frame of light about 1" wide all around. I thought the projector needed to be adjusted but that was not the case. The "light frame" does not seem to be part of the movie or show that is being projected.

We have another Seymour screens that has a 2" black, light absorbing border that does not have that issue (Sony projector). I had assumed that 2" light absorbing border was if you didn't have your projector adjusted correctly. Maybe it's for that odd light frame?

Is what I'm experiencing some sort of projector phenomenon I never experienced since my first screen had the light absorbing border or is this something else? It probably doesn't help that the wall the screen in mounted on is painted white.

Thanks in advance
[Edited by Eric M. on Apr 5, 2021 at 10:37 PM]
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DLP panels often have a light ring around them. The original 4K DLP chip had a very significant issue with a larger than typical light ring.

Newer DLP projectors have reduced this. From what I understand, it is a significant reduction. But, it hasn't eliminated it. I'm not sure I've seen it eliminated on any DLP projector completely. But, certainly some are better than others, and my understanding is that it is mostly the design of the DLP chip.

Yes, the proper way to deal with this is a frame which has a 2"+ frame with black light absorption around it. There is no way to correct what you are working with without getting a different projector. Likely LCD or LCoS models would not have any issue.
AV Integrated - Theater, whole house audio, and technology consultation during the build and installation process in the Washington, DC metropolitan area.
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Thanks.

Would that be considered over splash?

Eric
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Quote (Eric M. on Apr 11, 2021 9:26 PM):
Would that be considered over splash?

Sure! Why not? Light splash tends to be caused by the optics of the lens. But, the term over splash for projectors isn't really used a ton and is kind of a non-specific term. The light border of DLP chips can yield what I guess is easy enough to call over splash on the screen if you have a zero-edge screen.

I still strongly recommend screens with at least a 2" black border to suck up any over splash or framing issues that can occur to get a pristine image on screen.

At this point, if you have a screen already, if it is fixed frame, then you may consider putting up a black border on the wall surrounding the screen.

Something like this behind your screen may help to add some punch to the setup and suck up that over splash.
https://www.carlofet.com/shop/black-felt-tape
AV Integrated - Theater, whole house audio, and technology consultation during the build and installation process in the Washington, DC metropolitan area.
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Thanks.

I'll give the black border a try.

Eric