Christie J Series User Manual page 98

Section 3: Operation

White Uniformity Slide Bars
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 adjust-
ment in the White Uniformity menu their values will reach "0" first, causing the slide bar to stop ear-
lier than expected.

Judge By Eye Or Use A Meter
1. General Setup
a. Adjust primary colors see
Screens
output between screens.
IMPORTANT! Double-check that all WHITES and LIGHT
OUTPUT are well-matched.
b. Enable the Brightness Uniformity check box. This will
enable access to the uniformity controls and will apply the
settings to your image.
c. Select the 13-Point test pattern for display. This pattern
provides nine screen "zones" with 13 targets as shown.
NOTE: 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.
d. 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.
e. 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 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.
2. Adjust Color (level of red/green/blue) in Eight Zones
NOTES: 1) At this point, ignore the brightness of individual zones. 2) Always ignore menu colors.
a. 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—begin with this screen in Step 2b.
b. 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.
3-42
:
White Uniformity slide bar values may not reduce to "0". Each slide bar
:
Good brightness uniformity can be achieved with either.
3.13.1 Match Colors in Multiple
to ensure matched overall color temperatures and light
J Series 2.0, 2.4 and 3.0 kW User Manual
020-100707-03 Rev. 1 (02-2014)