Christie M Series User Manual page 50

5. 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 6.
• If you prefer maximum brightness rather than a particular color temperature, select Max
Drives. Do not change User 1 Color Adjustment in color-matched applications.
6. In the White Uniformity menu, and set the overall output level to 50.0 and all remaining slide
bars 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 likely interferes 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.
7. On each screen, compare the color temperatures in the eight target zones (four edges and four
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.
8. 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, for example 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 the corners.
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.
9. Repeat steps 7 and 8 for all remaining screens.
10. Beginning with the screen exhibiting the most obvious variations in light output, 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.
a) 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. The best uniformity is a compromise between the brightest and
darkest areas of the screen.
b) Adjust corner White Uniformity last.
M Series User Guide
020-101948-02 Rev. 1 (08-2018)
Copyright 2018 Christie Digital Systems USA, Inc. All rights reserved.
©
Adjusting the image
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