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Discussion Starter · #1 ·
I have a year 2000/week 47 Boxlight projector that probably

has the bright halo problem (which appears to the

top left above the screen). Does anyone know how this

problem is corrected at the manufacturer (do they realign the DLP chip

or refocus the lens?) I made a light mask by cutting out

a square hole in a circular piece of cardboard which is placed in

front of the projector lens to reduce most of the spillage

(seems to work well) however I am concerned that if the light leakage is

a problem with the internal alignment of the projector optics, then that could also

contribute to the "low contrast problem" evident in dark scenes

and movies like "Blade Runner" or "Dark City".
 

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Quote:
Originally posted by Rolan
I made a light mask by cutting out

a square hole in a circular piece of cardboard which is placed in

front of the projector lens to reduce most of the spillage

(seems to work well) however I am concerned that if the light leakage is

a problem with the internal alignment of the projector optics, then that could also

contribute to the "low contrast problem" evident in dark scenes

and movies like "Blade Runner" or "Dark City".
I use a rectangular cutout from aluminum foil darkened by electrical tape, on a different projector model. The trouble is that it also reduces the output slightly on the left side. The best place to put this aperture is internally, but that would require opening the projector. Since this is not my main projector, it is not on my priority fix-list.


You might want to call Infocus' service department. As bad as their QC is, I expect they are familiar with this problem, and would love to address it out of warranty, for CASH. Hopefully, your spillage is gray and not deep blue like mine. In that case, just ignore it.
 
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