Some 3D settings explained
Dark Time
Ghosting can be caused by the left and right images overlapping
during the time that the ZScreen or 3D glasses are switching.
Dark Time allows you to minimize this effect.
Source Dominance
The outgoing 3D frames are in pairs - the dominant frame being
presented rst. You can determine which frame should be the
dominant one.
By convention the default setting is Left.
Sync Offset
The sync signal from the 3D server will be in phase with the frames generated by its graphics card. However, to compensate for processing
delays in the projector, Sync Offset introduces a delay to the sync output signal sent to the ZScreen or 3D glasses.
Fully on
Fully off
Left
Right
Dark
time
Dark
time
Dark
time
Dominance Left
Dominance Right
LEFT 1 RIGHT 1 LEFT 2 RIGHT 2 LEFT 3 RIGHT 3
LEFT 3RIGHT 1 LEFT 1 RIGHT 2 LEFT 2 RIGHT 3
Incoming
video
Incoming
sync signal
Video signal with
processing delays (and
dark time adjustment)
Sync output signal
after delay adjustment
Notes
3D may not be present on some
models
In order to achieve maximum light
output and a smooth grayscale,
whilst eliminating ghosting,
the following procedure is
recommended:
1. Set the Dark Time to a value
appropriate to the glasses or
ZScreen, say 650 µS or 1300 µS.
2. Adjust the Sync Offset time to
eliminate ghosting and achieve a
smooth grayscale.
3. Repeat steps 1 and 2 until the best
result is obtained.
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