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8.5.5 Black level setup procedure
Black level introduction
The Purpose of the black level adjustment is to adjust the black levels in the non overlapped areas with the
black level in the overlapped areas (Blend Zone).
This is a necessary function, due to the fact that the black level will be brighter in the blend zones, since
multiple projectors will add light in these zones.
The width of the black level area shall ideally be slightly larger than the width of the blend zone in order to also
compensate for the "sea of mirrors" phenomenon.
The figure below shows how this occurs in a side by side configuration without any correction of the black
level.
Picture Left
Image 8–44
Black level adjustment procedure
1.
Select the menu Installation/Blend and mask/Black level.
2.
Enable the "Black level" and "Show lines" buttons. A line that indicates the blend zones will be visible on
the screen when "Show lines" is enabled.
Image 8–45
3.
Move the cursor to the side where the overlapped area occurs. (Left/right/top/bottom.) For the left
projector, this will typically be the right side in the menu as an example.
4.
Press enter, and adjust the value with the arrow keys. The icon shown below will appear on the OSD when
the side is selected. The value shall typically be the same as for the basic blend line. (Same numeric
value).
Blend Zone
Picture Right
Installation menu
R5911705 /02
Bragi
143
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