Christie DLV1280 DX User Manual page 88

Achieving Brightness
Uniformity
Figure 3.34. Disabling Primary Color Adjustment
'
WHAT IS BRIGHTNESS UNIFORMITY?
for their primary colors (see Adjust Primary Colors, 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
"seamless" 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:
USE PRIMARY COLORS—
control 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. With a new lamp, review
primary colors before working with Brightness Uniformity.
RUN LAMP FOR 100 HOURS—
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—
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 then require a 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 "USER 1" COLOR TEMPERATURE—
for the User 1 color temperature defined when you matched primary colors,
When used to refine screens already matched
Always activate and adjust the primary colors
Light output and Brightness Uniformity can vary
Make sure each "Lamp Power" setting is as high as
Always adjust Brightness Uniformity
OPERATION
DLV1280 DX User's Manual
3-55