page 60
Digital Projection E-Vision Laser 7500 & 8500 Series
Operating Guide
USING THE PROJECTOR
Rev B September 2016
3D menu continued from previous page
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.
Eye Swap
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 Delay
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 Delay 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
In order to achieve maximum light
output and a smooth grayscale,
whilst eliminating ghosting,
the following procedure is
recommended:
1. Set Dark Time to a value
appropriate to the glasses or
ZScreen, say 1.3 ms or 1.95 ms.
2. Adjust 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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