Clarity WN-5220-S User Manual page 49

8. Display a 50% gray
image
9. Identify the least
bright unit again
10. Color balance the
displays – 50% gray
mode
The following chart shows the relationship of the menu item
adjustments.
Color
All Increase the overall luminance
(brightness)
Red Change white toward red
Green Change white toward green
Blue Change white toward blue
Note: If one color needs to be increased, but that color is already as high as it can go, then the
other two colors can be decreased.
A helpful technique to use when adjusting the colors and gray shades is to
"overshoot" as you adjust to emphasize the effect that the current adjustment
is having to the overall image, and then to back off to fine tune. This helps to
give an intuitive feel for the process.
It is often helpful to switch between the internal white and gray patterns and
actual video images to fine tune the system. Avoid making major changes
when adjusting to the video images because this can throw off the white or
gray balance. Remember also that the Input Level adjustment has a large
effect on color. If Input Level adjustments have not been made, color balance
for live video will be difficult. However, you may adjust Color Balance before
or after you do the Input Level adjustment. They do not affect each other –
that is, an adjustment in Color Balance does not affect the Input Level
adjustment, and vice versa – but they must both be adjusted properly for the
screens in the cube to match in color balance, luminance and black level.
Do not adjust Color Balance with Red, Green and Blue test patterns. This is
a method sometimes used with CRT displays, and it will not work with these
Clarity displays.
After you have color balanced all the units, save the settings for each unit. It
does not matter which source-mode combination you save, because color
balance data is saved once for all sources and modes. You should not have
On each display in the video wall, open the Misc Control
menu, select Test Pattern and choose 50% Gray.
Find the unit that looks the darkest. This may not be the
same one that was the darkest one with a White test pattern.
This is the baseline unit for Gray
Adjust the relative amounts of RED, GREEN, and BLUE in
the gray (GRY) column to achieve the best match in color
and luminance to the baseline display.
Increase will:
WN-5220-S VideoWall User's Guide
Decrease will:
Decrease the overall luminance
(brightness)
Change white toward cyan
Change white toward magenta
Change white toward yellow
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