Christie Digital Systems Ds+60, Dw30, Matrix 3000 Users Manual

							Section 3: Operation 
 
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Figure 3.26. Copy X/Y Values into All Projectors 
6.  In each projector, judge by eye and adjust x/y coordinates slightly in the following 
manner: 

						

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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 right), 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:  

						

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• 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! 
1e) 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), then adjust 
its corners. See Figure 3.28 
 
  
						

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Figure 3.28. 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 3.9). 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 3.29. 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.  
						

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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. 
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 right). 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 3.31. 
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. 
Standard edge blending software controls are located in the 2-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. 

						

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Ranges: 0-80 horizontal, 0-60 vertical. 

						

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Edge Blending Procedure 
BEFORE YOU BEGIN: Make sure your 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 3.34). Tiling 
not a projector feature. 
Physically align the projectors and images from 
your intended external source, then match colors 
and Brightness Uniformity. 
 IMPORTANT  
For a shared edge, the following Blend procedures and 
settings should be identical on BOTH projectors. 
1.  Start with 2 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. 
 
 
3. SET STARTING POINTS FOR ADJUSTMENT: 

						

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6. CHECK BLEND: If the blended region appears too dark or light in relation to the rest 
of the image: 

						

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Occasionally the projector will encounter an error condition that can interrupt normal 
operation. Such a condition can be caused by a simple invalid keypad entry, an input 
signal error (most common) or a system error. The manner in which users are to be 
notified of error conditions is set in the Menu Preferences menu: 
• To see error messages displayed on-screen, select the “
Screen” option 
• To be notified via a serial communication only, select the “
RS232” option. 
• To receive both types of notifications, select “
All”.  
• To disable error messages (except for “invalid user key entry”, which can’t be 
hidden), select “
Off”. 
The 2-digit error code that corresponds to the message appears in the LED status 
display window located next to the built-in keypad (Figure 3.36.). NOTE: During 
normal operation the status code “0n” appears. 
 
Figure 3.36. LED Status Display on Built-In 
Invalid User Entry 
A keypad entry not recognized by the projector triggers a short on-screen error 
message identifying the problem. For example, if you specify a channel number that is 
not available, the message “Invalid Channel will appear. Or if you try to enter the 
wrong password, you’ll see “Invalid Password”. Press 
 or Ex i t to clear the 
message and try again. 
NOTE: On-screen display of “Invalid User Entry” messages cannot be disabled, even 
if Display Error Messages has been set to “Off”. 
An input signal error message occurs if you are in presentation level (i.e., there are no 
menus present) and have selected an input on which the projector detects a problem. 
While menus remain operational and any key press will temporarily remove any 
displayed error message, you must resolve the signal problem in order to permanently 
eliminate the message. 
No Signal 
The message No signal occurs when there is no source signal detected at the 
selected input—both HSYNC and VSYNC are inactive and the screen background is 
black. Connect or correct the signal, or try another input. 
Bad Sync 
The message Bad Sync occurs when HSYNC or VSYNC are active but the signal 
cannot be displayed. Such a condition occurs when only one of the two sync signals is 
present, or when either sync signal is unstable or the wrong frequency. Correct the 
signal or select another input. 
3.12 Error Conditions 
 User Errors 
 Input Signal Errors