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9. Image menu
9.3.9.2 Adjusting the input balance
How can it be done ?
To balance the three color signals of a particular source there are conditions; in fact we must know the black and the white level of
the source i.e. :
1. The source in question must be able to generate a white signal, ideally a 100% white (background) full screen pattern
2. The source in question must be able to generate a black signal, ideally a 100% black (background) full screen pattern
A
B
Image 9-44
White balance : In the projector, we will set the contrast for each color until we get a 100% light output picture when projecting a
100% white image (image A)
Black balance : In the projector, we will set the brightness for each color until we get a 0% light output picture when projecting a
100% black image (image B).
The changeover from min to max is indicated by the apparition of brigh
t spots also called “digital noise”
An alternative to a full screen White/black pattern is the standard gray scale pattern, the white bar will be used
for white balance and the black bar for black balance.
Image 9-45
Black balance
1. Press MENU to activate the menus.
2. Use the ▲ or ▼ key to select Image and press ENTER.
3. Use the ▲ or ▼ key to select Image settin
gs and press ENTER.
4. Use the ▲ or ▼ key to select Input balance and press ENTER.
5. Do you want to use an internally generated test pattern ?
If yes, Use the ▲ or ▼ key to select Test pattern and press ENTER to toggle between [on] and [off]
If no, Adjust on the selected source.
6. Use the ▲ or ▼ key to select Black balance and press ENTER.
Depending whether a test pattern is selected or not, the adjustment image is displayed.
7. Toggle with ▲ or ▼ key to select Black balance red. (image 9-46, image 9-47, image 9-48, image 9-49, image 9-50)
8. Adjust the red black level on a minimal value
R59770021 CLM R10+ 11/10/2010
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