Christie Mirage User Manual page 31

— (note: not always required). For slower gating
DARK INTERVAL
technologies, you may also need to artificially increase the amount of dark
time between displayed frames so that shutters have even more time to
open/close and each eye sees the full display intended for it. Symptoms are
more subtle than cross-talk—if the dark interval is too brief for proper gating,
you may notice an apparent color temperature problem, with some whites or
grays appearing with a slight red, green or blue tint. This color artifact is
particularly easy to diagnose in a grayscale test pattern displayed in 3D
mode. In the Advanced Image Settings menu, increase the "Dark Interval" as
necessary until the grayscale is correct—you may also have to increase the
internal frame delay when using a longer Dark Interval. The Dark Interval
range of adjustment depends on the vertical frequency of your source—the
higher the frequency, the smaller the range.
NOTES: 1) Increasing the Dark Interval decreases the peak brightness of the image.
Use only if necessary—you may prefer some color artifacts rather than reduced
brightness, or vice versa. 2) Higher input frame rates limit the range of Dark
Interval adjustment. 3) Faster glasses allow a briefer dark interval.
— This option defines 1) whether or not the incoming 3D
3D STEREO SYNC
signal locks to the vertical sync output so that signals are synchronized, and
2) whether or not the 3D frames must be inverted, i.e. swapped left-with-
right. The correct setting ensures that the projector's 3D display of left/right
frames is synchronized with other 3D system components so that left/right
image data is seen by the intended eye. Select the option corresponding to
your 3D source connections and timing, and use only if the Mirage 3D
Stereo Sync Cable is connected between the projector's GPIO port and a
server (this cable replaces the need for a separate TTL inverter). Keep this
adjustment OFF (default) when you are not using the 3D Stereo Sync Cable.
With your sync cable, Z-screen and, if desired, emitter connected, select the
option suited to your 3D configuration (see above). If frame delay is 2 (or 0),
do not invert; if frame delay is 1 or 3, invert. Generally, an "Unlocked"
setting is synchronized with the incoming L/R signal rather than the vertical
sync output, and may be needed only with multi-projector installations in
which the vertical sync outputs vary slightly.
— Define which of the Mirage 3D Stereo Sync
3D STEREO SYNC SELECT
Cable's input connecters is routed to your server. Input A = BNC connector,
Input B = BNC connector. Use only if the cable is present.
— Set when the L/R frames begin, defining the
3D STEREO SYNC DELAY
best reference point for synchronizing the display with your glasses. Proper
adjustment should eliminate cross-talk and odd colors caused by timing
differences between the glasses and the projected display. Use this slide bar
only if the Mirage 3D Stereo Sync Cable is connected between the
projector's GPIO port and a server. Slide bar values indicate the number of
lines that are delayed.
Figure 15 shows the various relationships between signals and Mirage
software adjustments for 3D images.
Christie Digital Systems Inc. Using 3D in Mirage 25