Christie Projector Roadster, Matrix WU, Mirage S+/HD/WU User Manual

							 Operation 
Roadster, Matrix WU, Mirage S+/HD/WU User Manual 3-67 020-100002-05 Rev. 1 (02-2010) 
 
Figure 3.29. Copy X/Y Values into All Projectors 
6. In each projector, judge by eye and adjust x/y coordinates slightly in the following 
manner: 
 To match reds, decrease “Red 
X” until full field red screens 
match. 
 To match greens, decrease 
“Green Y” until full field 
green screens match. 
 To match blues, increase both 
“Blue X” and “Blue Y” until 
full field blue screens match. 
NOTE: For speed, enable the 
“Auto Color Enable” checkbox. 
Each color coordinate you select will then automatically trigger a full field display 
of the corresponding color. 
Alternatively, use the Color Saturation menu for these adjustments or to fine tune. 
These coordinate adjustments move the three color points closer together (refer 
back to the chromaticity chart shown in Figure 3.23) to establish a “shared” 
gamut attainable by all projectors in your group. Adjust only as necessary to 
ensure that the resulting color palette is as large as possible. When done, you may 
need to adjust lamp power slightly. 
7. All screens should now be color-matched and the will remain matched upon exit 
from the menus. Apply this new “User” gamut to a source at any time by selecting 
it in the “Select Color Adjustment” list accessed in the Advanced Image Settings 
menu. 
 
  
						

							Operation  
3-68 Roadster, Matrix WU, Mirage S+/HD/WU User Manual  020-100002-05 Rev. 1 (02-2010) 
Using the Color Saturation Menu for Color Matching 
You may prefer to use the 
Color Saturation menu to 
match colors across multiple 
screens. In the three Color 
Adjustment submenus (Red, 
Green, Blue—see Figure 
3.30), set all main values to 
100 and the secondary values 
to 0. Then judge by eye and 
adjust the slidebars as 
needed. Note that 
adjustments here define new 
x/y coordinates in the Color 
Adjustments by X, Y menu. 
For best results, use this 
menu after doing the color 
adjustment procedure. 
 
WHAT IS BRIGHTNESS 
UNIFORMITY? 
When used to refine screens already matched for their primary colors 
(see Matching Colors in Multiple Screens, above) and overall light output, proper 
adjustment of Brightness Uniformity can create an exceptionally smooth screen in 
which: 
 No area of the screen appears more red, green or blue than another  
 No area of the screen appears brighter than another 
 Color and light output from one screen closely matches adjacent screens 
Although the Brightness Uniformity control can be used for a stand-alone projector, it 
is particularly useful for setting up and maintaining tiled images that form a cohesive 
display wall in which the color “cast” and light output appear uniform throughout 
each image as well as throughout the entire wall. The procedure provided here 
assumes a multiple-screen application. 
 Before You Begin 
Read through the entire procedure before attempting to adjust Brightness Uniformity 
controls, and keep in mind the following checklist of prerequisites and guidelines:  
 ADJUST COLORS FIRST—Always adjust the primary colors as described in the 
“Matching Colors in Multiple Screens” procedure (above) before attempting to 
work with Brightness Uniformity. This ensures that primary colors, color 
temperature, and maximized light output are all well matched from one screen to 
another. These matches are needed before you can achieve good Brightness 
Uniformity results. 
 RUN LAMP FOR 100 HOURS—Light output and Brightness Uniformity can vary 
significantly during the first 100 hours of lamp use. For best results with new 
lamps, either set up Brightness Uniformity after this period, or do an initial setup 
and re-check at 100 hours. 
 
Figure 3.30. Color Matching Using 
Color Saturation Menu 
 Achieving Brightness 
 Uniformit
y 
  
						

							 Operation 
Roadster, Matrix WU, Mirage S+/HD/WU User Manual 3-69 020-100002-05 Rev. 1 (02-2010)  
SET LAMP POWER—Ensure each “Lamp Power” setting is as high as possible for 
your application while still maintaining a good overall match of light output from 
screen-to-screen. By nature, achieving a uniform brightness will require a slightly 
reduced overall brightness—this reduction will help ensure that you have enough 
range of adjustment when examining brightness variables more closely from 
screen-to-screen, and will help prevent premature “maxing out” when trying to 
match to a certain color, zone or projector. 
 USE A “USER” COLOR TEMPERATURE—Always adjust Brightness Uniformity for 
a User color temperature defined when you matched primary colors, and 
continue to use it for all sources displayed on the wall. Your other color 
temperatures will not necessarily be matched from screen-to-screen. 
 WHITE UNIFORMITY SLIDEBARS—White Uniformity slidebar values may not 
reduce to “0”. Each slidebar adjusts overall light output in a specific screen zone, 
but the value shown represents the current setting for green in this zone. When 
other “hidden” values (red or blue) are lower than green, during adjustment in the 
White Uniformity menu their values will reach “0” first, causing the slidebar to 
stop earlier than expected. 
 JUDGE BY EYE OR USE A METER—Good brightness uniformity can be achieved 
with either.  
Step 1: General Setup 
1a) Adjust primary colors (Refer to Matching Colors in Multiple Screens) to ensure 
matched overall color temperatures and light output between screens.  
IMPORTANT: Double-check that all WHITES and LIGHT OUTPUT 
are well matched. 
 
1b) Enable the Brightness 
Uniformity checkbox. 
This will enable access 
to the uniformity 
controls and will apply 
the settings to your 
image. 
 
1c) Select the 13-Point test pattern for display. 
This pattern provides nine screen “zones” 
with 13 targets.  
FOR BEST RESULTS: Rather than 
examining the CENTER of each zone when 
assessing Brightness Uniformity 
adjustments focus on extreme EDGES as 
indicated in the illustration at right. 
 
 
  
						

							Operation  
3-70 Roadster, Matrix WU, Mirage S+/HD/WU User Manual  020-100002-05 Rev. 1 (02-2010) 
In either Color Adjustments menu, select a “User” color. Then: 
 If you have created a “User 1” color gamut (recommended) for a well-
matched wall, continue to Step 1e. 
 If you prefer maximum brightness rather than a particular color temperature, 
select “Max Drives”. 
 IMPORTANT  
Do not change User 1 Color Adjustment 
in color-matched applications! 
1d) In the White Uniformity menu, 
set the “Overall” output level to 
50.0 and all remaining 
slidebars to 0.0. This decreases 
the light output just enough 
throughout the screen so that 
any color level can then be 
increased later as necessary for 
matching light output from 
zone-to-zone. Do not exceed 
50.0 for “Overall”—a higher 
level will likely interfere with achieving brightness uniformity and is not 
recommended. 
Ensure that overall light output remains well-matched from one screen center to 
the next. Where necessary, increase or decrease Lamp Power slightly to recover 
center matches. 
Step 2: Adjust Color (level of red/green/blue) in 8 Zones 
NOTES: 1) At this point, ignore the brightness of individual zones. 2) Always 
ignore menu colors. 
2a) On each screen, compare the color temperatures in the 8 target zones (4 edges 
and 4 corners) to that of the color temperature of the center. Compare using a 
white field only, and take note of any areas that do not match the center. Also 
decide if any screen exhibits a more obvious color shift than other screens—
begin with this screen in Step 
2b.  
2b) Return to the Brightness Uniformity menu. Beginning with the screen that exhibits 
the most obvious color shift(s), for each edge that exhibits a noticeably different 
color temperature from the center, select the corresponding Uniformity adjustment 
menu—Left, Right, Top or Bottom. For example, if any part of the left side is too 
blue, too red or too green, go to the Left Uniformity menu and adjust the colors (i.e., 
change their light output) until all portions of the left side closely match the center 
color temperature. Adjust an edge first (focusing on its center), and then adjust its 
corners. See Figure 3.31. 
 
  
						

							 Operation 
Roadster, Matrix WU, Mirage S+/HD/WU User Manual 3-71 020-100002-05 Rev. 1 (02-2010) 
 
Figure 3.31. Match Zones to Center Color Temperature 
Repeat the color adjustment of sides and corners for each edge of the screen that does 
not yet match the center (note that each corner is adjustable in either of its two 
adjacent “side” menus). When done, all areas of a given screen should match. Repeat 
Steps 
2a & 2b for all remaining screens. 
Step 3: Adjust Light Output in 8 Zones 
3a) For each screen, compare the light output of each edge and corner to that of the 
center. If any of the areas differ, use the White Uniformity menu to match edges 
and corners to the center as described below (see Figure 3.32). Begin with the 
screen exhibiting the most obvious variations in light output. 
 Adjust edge White Uniformity first—note that each edge adjustment also affects 
the rest of the screen slightly. Keep all edges just slightly lower than the center 
light output rather than matching light output precisely. Otherwise, it may not be 
possible to brighten the corners (typically the dimmest areas of the screen) 
enough. I.e., the best uniformity is a compromise between the brightest and 
darkest areas of the screen. 
 Adjust corner White Uniformity last—each corner adjustment affects only this 
quadrant. 
 Repeat for each screen. 
 
Figure 3.32. Match Zones to Center Light Output 
Step 4: Readjust Color Temperature (level of red/green/blue) in 8 Zones 
4a) Return to Steps 2a & 2b and, if necessary, fine-tune the zones so that they all still 
exhibit a single color temperature. 
Canceling Brightness Uniformity 
If you do not want to use or apply Brightness Uniformity settings, delete the 
checkmark from the “Uniformity Enable” checkbox at the top of the Brightness 
Uniformity menu.  
						

							Operation  
3-72 Roadster, Matrix WU, Mirage S+/HD/WU User Manual  020-100002-05 Rev. 1 (02-2010) 
Christie Edge Blending is an innovative set of software functions that can quickly and 
easily blend the edges of multiple adjacent full screen images to create a single 
seamless larger image. 
What is a Blend? 
In simple terms, a blend appears as a gradient strip along an 
edge of a projected image. It is darkest along the extreme 
edge of the image, and lightens nearer to the rest of the image 
(see Figure 3.33). This area runs along the edge of the 
projector’s internal DMDs (display area); it cannot be located 
on interior pixels. 
How Are Blends Used? 
In multiple-projector walls, 
complementary blends 
between neighboring images 
can compensate for the extra 
“brightness” or intensity where 
these edges overlap. By 
controlling blend width and 
other properties, you can 
achieve uniformity across the 
group of images. Visible overlaps will disappear as illustrated in Figure 3.34. 
For best results, use the same projector model and type throughout your display wall. 
In addition, avoid high-gain screens whenever possible—the optical performance of 
such screens demands minimal image offset, thus projectors must be located very 
close to one another. Note too that the requisite tiling of the image—with data 
repeated along internal edges that will overlap—must be correctly done by your 
source. 
Flat Blends vs. Warped Blends 
FLAT BLENDS: It is important to 
remember that the projector’s standard 
edge blending controls affect the outer 
edges of the projector’s display panel, 
and that each blend is consistent along 
its length (refer back to Figure 3.33). 
The standard Edge Blending menu 
controls can blend multiple flat full-
panel displays if they have no warping 
or keystoning applied. 
WARPED BLENDS: When using the optional Christie TWIST module for warping 
images on to curved screens, work with its separate Christie TWIST PC application to 
create more specialized blends required. Such a blend can vary along its length to 
compensate for curves. Once downloaded to the projector, simply apply the desired 
custom “user” blend by selecting it in the Blending Enable pull-down list.   Ed
ge Blending 
 
Figure 3.33 
 
Figure 3.34. Edge Blending Concept 
(NOTE: TILING DONE AT SOURCE) 
 
 
  
						

							 Operation 
Roadster, Matrix WU, Mirage S+/HD/WU User Manual 3-73 020-100002-05 Rev. 1 (02-2010) 
Optional Blinders 
If desired, you may wish to install the optional mechanical blinders at the projector 
lens. These adjustable blades help to blend blacklevels along edges of the image, and 
are available in a separate kit.
 
Since the blinders and Edge Blending menu controls are intended to complement 
each other, with blinders primarily affecting blacklevels and software primarily 
affecting whitelevels, together these components produce the best blends possible for 
any type of flat image. Or, depending on your projector model and your application 
needs, you may prefer to utilize only the standard software controls—for example, 
you may find that the edges of white or very light images can be well-blended 
without blinders. In other more unusual applications with only a very small area of 
overlap, you may need only the blinders. 
Standard edge blending software controls are located in the two-page Edge Blending 
submenu access via Configuration menu, then Geometry and Color submenu, then 
Edge Blending. The More option opens the second page of the Edge Blending 
submenu. 
Main Functions 
Use standard edge blending controls to set the precise width, shape and midpoint you 
need to blend overlapping edges together smoothly. 
 
Blend Width determines how much area is used for blending along an overlapping 
edge. Slidebar values represent the number of eight-pixel steps used for the 
blend. For example, a setting of “3” creates a blended edge 24 pixels wide. A 
setting of “0” signifies no blending. For best results in most applications, use a 
blend width of 16-48 steps (128-384 pixels). 
 Ranges: 0-80 horizontal, 0-60 vertical. 
 
Blend Shape determines the rate of 
roll-off across the blend width, i.e. 
how quickly the white levels across 
the blend change from light and dark. 
Increasing the Blend Shape setting 
accelerates the rate of change at both 
extremes so that less of the region 
appears mid-gray (see Figure 3.35). 
Decreasing the Blend Shape setting 
slows the rate of change so that more 
of the region appears mid-gray. For 
most applications, this subtle control 
is best left close to 50. 
 
Figure 3.35. “Shape” Examples  
						

							Operation  
3-74 Roadster, Matrix WU, Mirage S+/HD/WU User Manual  020-100002-05 Rev. 1 (02-2010) 
 Blend Midpoint determines the white 
level at the blend midpoint (the point 
equidistant between the beginning 
and end of the blend). Increasing the 
Blend Midpoint setting creates a 
blend that appears brighter than the 
rest of the image. Decreasing the 
Blend Midpoint setting creates a 
blend that is darker than the rest of 
the image. A setting of 50 means the 
midpoint is approximately 50% 
black—for best results in most 
applications, keep fairly close to this 
default (see Figure 3.36).  
 
Show Blending Overlap turns your 
defined blend width area to solid gray 
so that simply overlapping their gray 
bars, if needed can seamlessly align two 
adjacent images. Toggle the Show 
Blending Overlap off to reactivate the 
blend effect.  
NOTE: Show Blending Overlap 
appears as Reserved when Christie 
TWIST is installed. 
Other Functions  
For convenience, the Edge Blending 
submenu also includes related options for 
enabling a specific color and/or test pattern, 
or for working with colors or the lamp. 
Such functions duplicate those provided 
elsewhere in the menu system. 
Edge Blending Procedure 
BEFORE YOU BEGIN: Ensure the source hardware 
and/or software can supply a tiled image for the 
number of projector in use, and that the tiling includes 
overlapping data of approximately 12.5-25% along 
shared edges (see Figure 3.37). Tiling not a projector 
feature. 
Physically align the projectors and images from your 
intended external source, and then match colors and 
Brightness Uniformity. 
IMPORTANT: For a shared edge, the following Blend procedures and 
settings should be identical on BOTH projectors. 
 
 
Figure 3.36. “Midpoint” Examples 
 
 
 
Figure 3.37. Tiling Example  
						

							 Operation 
Roadster, Matrix WU, Mirage S+/HD/WU User Manual 3-75 020-100002-05 Rev. 1 (02-2010) 
1. Start with two full-screen projector images overlapped by approximately 12/5%-
25% each. Display full white field test pattern from both. 
2. In the Edge Blending submenu, enable the top checkbox to activate all controls. 
 
NOTE: If the 
optional Christie 
TWIST module is 
installed, a pull-
down list 
replaces this 
checkbox (see 
right). Select the desired user-defined blend created for your current warp; no 
further blending at the projector is required. Or, to simply edge blending a non-
warped flat image, select “Standard” and continue with Step 3. 
3. 
SET STARTING POINTS FOR ADJUSTMENT (Figure 3.38): 
 Set all blend widths to 0. 
 Go to “More” and set everything in the Edge Blending (2) menu to 50. 
 
Figure 3.38. Set Starting Points for Each Projector 
4. SET BLEND WIDTH: On one projector, increase the Blend Width for an overlapping 
edge (for example, if the projector’s image is on left, its right edge overlaps the 
adjacent image—adjust Right Blend Width). Use the same setting on the second 
projector for this shared edge. 
5. Re-adjust width (both projectors) until the overly bright band at the midpoint of 
the overlapping blends disappears or just changes to very light gray. For the shared 
edge, use the same Blend Width setting on each projector. If the best effect appears 
to be between two settings, choose the wider setting for both projectors. 
6. 
CHECK BLEND: If the blended region appears too dark or light in relation to the 
rest of the image: 
 Increase Blend Midpoint in both projectors to “lighten” the overall blend, 
decrease to “darken” the overall blend. 
 Adjust Blend Shape in both projectors to fine-tune change the amount of mid-
gray intensity (as opposed to black/white) in the blend. 
7. Repeat with remaining projectors / overlaps. 
8. Check completed display wall with the desired external signal. 
9. Adjust mechanical alignment if necessary to maintain perfect pixel-on-pixel 
alignment over time. 
  
						

							Operation  
3-76 Roadster, Matrix WU, Mirage S+/HD/WU User Manual  020-100002-05 Rev. 1 (02-2010) 
In applications where you are projecting only white or light images, the Blend Width 
may be slightly higher—set according to how much overlap you have between 
images. 
 Recommended overlap is 12.5% - 25% 
 
Similar to Edge Blending, Black Level Blending allows you to adjust the black level 
hues of multiple adjacent projected images to create one large seamless display. Edge 
blending must be enabled in order to use the Black Level Blending features. 
The use of Black Level Blending feature and the use of Christie Twist module are 
mutually exclusive. On WU models, Keystone is only available when Christie 
TWIST is in use. If Christie Twist is installed and Black Level Blending is desired: 
1. Disable use of warps or 2D Keystone. 
2. Enable edge blending; if not enabled. 
3. Enable Black Level Blending. 
4. Power down the projector then power up again. 
Adjustments can now be made to black level controls.  
To restore the use of Christie Twist: 
1. Disable black blending. 
2. Power cycle the projector. 
3. Begin using the Twist controls. 
 
Black Level Blending Procedure 
NOTES: 1) Adjust white levels before adjusting black levels. 2) The zones in BLB 
menu correspond to the Edge Blend zones. If a given Edge Blend zone width is set to 
0 (i.e. no blend on that side) then the corresponding BLB zone is disabled. It only 
becomes accessible when that Edge Blend zone is active. 
1.   Start with two projectors. Select the black test pattern for both projectors from 
the Geometry and Color submenu. 
2. In the Black Level Blending submenu, enable black blending by putting a 
checkmark in the checkbox for each projector. 
 
 
         Black Level Blendin
g   