Advertisement
23(5$7,21
6RIWZDUH 5HTXLUHPHQWV
&XVWRPL]LQJ WKH
,QSXW 6LJQDO
8VHU·V 0DQXDO
0LUDJH
synchronizing the left/right shutters in your 3D glasses to match the images
displayed by the projector, you must connect a left/right inverter to the source.
This ensures that shutter changes in the glasses allow each eye to receive the
image data intended for it, regaining the 3D effect of the display.
NOTE: Depending on your workstation, it may be possible to implement the
reversal of left/right frames through software only, eliminating the need for
separate inverter hardware. Likewise, depending on your source and glasses,
you may be able to utilize Graphics/HDTV processing for 3D, which also
eliminates the need for separate inverter hardware.
N
: This small device emits left/right IR signals to a receiver in 3D
,5 (0,77(5
glasses, causing their left/right shutters to alternately open and close during
use in an active 3D application.
N
: Active glasses differ in speed/performance—consult the
*/$66(6
documentation for your glasses and keep their specifications in mind when
reconfiguring your source signal. The input signal must be optimized for the
available shutter speed in order to prevent obvious "ghosting" of image
content (known as cross-talk in 3D applications) as well as other more subtle
color artifacts. Such problems indicate that the eyes are detecting portions of
the opposing frame due to an "out-of-sync" system, and can occur in either
active or passive 3D configurations. See Customizing the Input Signal, below,
for examples of well-synchronized systems.
NOTE: In a passive system, where glasses do not have shutters and instead
depend on the speed and accuracy of the Pi Cell polarizer, the input signal
must be synchronized with the polarizer.
N
0,5$*( 352-(&725
If you need to customize your 3D input signal for use with the projector, you will
need access to software that controls video output timing from the graphics source.
For example, the Video Format Compiler (vfc) and ir combine are required when
using the Silicon Graphics ONYX
The display must be synchronized with shutter control—called gating—so that each
eye receives only the frames of data intended for it, otherwise you will detect
opposing data frames (cross-talk) and see faulty images. This requirement means that
timing parameters in your source should guarantee the following:
1) Each new frame begins after the opposing shutter mechanism is closed
2) Each frame completes its display before the opposing shutter mechanism
begins to open.
3) Each frame (mirror sequence) is displayed in its entirety to the correct eye.
:KDW 7R $GMXVW
Since some 3D-video sources do not have the necessary characteristics for use with
this projector, in these cases you must synchronize the projector's display with your
gating mechanism by adjusting the vertical sync width and/or vertical back porch of
the input signal and, in many cases, by adjusting the projector's Dark Interval
control. These two parameters—input timing and dark interval—are described below.
Note that because they interact with each other, you may have to go back and forth
between them when optimizing the 3D display. In general, vertical frequency + Dark
Interval/10 = 120 Hz or less.
Recommended processing mode is "Minimum Delay".
TM
workstation.
Advertisement
