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Section 3: Operation
J Series 2.0, 2.4, and 3.0kW User Manual 3-41
020-100707-01 Rev. 1 (10-2011)
The
F
UNC
+
H
ELP
key combination will immediately disable the Keystone , Brightness Uniformity , Edge
Blending and Black Level Blending features. This is helpful when, in some extreme keystone configurations,
some image corruption may appear and/or the menus may not be readable. Although
F
UNC
+
H
ELP
disables
these features, it will not overwrite their settings. If keystone is simply enabled again, the same image
corruption may occur. After pressing
F
UNC
+
H
ELP
,
it is recommend to immediately “Reset Keystone Settings”,
which will set all keystone co-ordinates to zero.
BRIGHTNESS UNIFORMITY - S
UBMENU
• Brightness Uniformity provides further refinement of displays already matched for their primary colors and
overall light output. Use Brightness Uniformity to create an exceptionally smooth image in which no area
appears brighter than another. In the Brightness Uniformity menu, enable the Brightness Uniformity Enable
check box to access a multitude of adjustments for light output control in specific areas throughout the
image. Your settings apply as long as the Brightness Uniformity Enable check box is enabled. While making
adjustments, enable the Coarse Adjustment check box to apply Brightness Uniformity settings with a large
granularity. Coarse Adjustment helps identify brightness changes and accelerates projector response time
while adjusting settings. To disable the Brightness Uniformity function, delete the Brightness Uniformity
Enable checkmark.
WHAT IS BRIGHTNESS UNIFORMITY?
When used to refine screens already matched for their primary colors, see
3.12 Using Multiple Projectors:
Matching Colors in Multiple Screens 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.
IMPORTANT!
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 3.12 Using Multiple Projectors :
Matching Colors in Multiple Screens procedure, 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.

SET LAMP POWER—
Ensure that 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 uni-
form 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 pro-
jector.