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7. Image Menu
A
B
Image 7-27
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 bright 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 7-28
Black balance
1. Press MENU to activate the Toolbar
2. Press → to select the Image item
3. Press ↓ to Pull down the Im age menu
4. Use ↑ or ↓ to select Input balance
5. Press → to pull down the menu
6. Use ↓ or ↑ to select Black balance (image 7-29)
7. adjust the red black level on a minimal value (imag
e 7-30, image 7-31)
8. adjust the blue black level on a minimal value
Note: th is minimal value is not necessary , provided that the 2 other colors are not influencing too much the color to be adjusted,
in fact the aim is to minimize the effect of the tw o other colors since there is a risk of reaching too soon the 50% transition
due to the contribution of the se two other colors signals.
9. Adjust the green black level until bright spots appear on the screen
10.adjust the blue black level on a minimal value
Note: th is minimal value is not necessary , provided that the 2 other colors are not influencing too much the color to be adjusted,
in fact the aim is to minimize the effect of the tw o other colors since there is a risk of reaching too soon the 50% transition
due to the contribution of the se two other colors signals.
11.Adjust the green black level until bright
spots appear on the screen
12.Adjust the Blue black level until bright spots appear on the screen
13.Adjust the red black level until bright spots appear on the screen
the projected image should know be noisy full black
R5976367 BARCOIQ GRAPHICS 500 01/02/2007
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