User manual

8.0 ADJUSTING THE IMAGE
68 R599791 - FORCE 3D User Manual
• 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 checking list of prerequisites and guidelines:
• ADJUST COLORS FIRST—Always adjust the primary colors, 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 uniform
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 projector.
• USE A “USER” COLOR TEMPERATURE—Always adjust brightness uniformity for a User color temperature
defined when you matched primary colors, and continue to use it for all sources displayed on the wall. Your other
color temperatures will not necessarily be matched from screen-to-screen.
• WHITE UNIFORMITY SLIDE BARS—White Uniformity slide bar values may not reduce to “0”. Each slide bar
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 adjustment in the White
Uniformity menu their values will reach “0” first, causing the slide bar to stop earlier than expected.
• JUDGE BY EYE OR USE A METER—Good brightness uniformity can be achieved with either.
Diagnostics & Calibration - Submenu
• TEST PATTERN
Choose the desired internal test pattern to display, or select OFF to turn off a test pattern. Alternatively, use the
TEST key for cycling through test patterns.
• GREY LEVEL
This will set the level of grey for displaying in the full gray field test pattern.
• FREEZE IMAGE
Enter a check mark to freeze (stop) an image on a single frame. Use this diagnostic tool to examine in detail a still
version of an incoming image that cannot be “frozen” at the source. For example, in moving images it is sometimes
difficult to observe artifacts such as external de-interlacing/resizing and signal noise. Remove the checkmark to
return to normal.
• COLOR ENABLED
Select which color(s) you want to see. Use this while working with color temperature, input levels or other special
setup parameters. Colors can be enabled/disabled by entering the corresponding function code listed on the back of
the standard remote keypad.
• INPUT PEAK DETECTOR
A fast method for defining individual input levels, and improving the accuracy of input levels set by the Auto Input
Level function. Enabling the Peak Detector activates a special operating mode for detecting only pixels that are
considered black or white—all other levels are displayed as a mid-level gray. When used with a 16-step grayscale
pattern in which the two black and white bands are known to be at opposite edges of the image, you can watch
these isolated areas while adjusting individual black levels and input drives until both bands are just visible. Images
from this source will then display correct blacks and whites without crushing or washing out.
NOTE: If using Peak Detector with PIP, both images must have the same color space.
• INPUT LEVEL DETECTOR
The Input Level Detector check box enables specific thresholds for blacks and whites. Input levels that fall below a
specified level value (see below) are displayed as black, and all others are displayed as white. To use:
1. Enable Input Level Detector and display a continuous grayscale.