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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 afull screen White/black pattern is the standard gray scalepattern, 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 Image menu
4. Use ↑ or ↓ to select In put 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: thisminimal valueis not necessary, provided thatthe 2 othercolors are notinfluencing too muchthe colorto be adjusted,
in fact the aim is to minimize the effect of the two other colors since there is a risk of reaching too soon the 50% transition
due to the contribution of these 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: thisminimal valueis not necessary, provided thatthe 2 othercolors are notinfluencing too muchthe colorto be adjusted,
in fact the aim is to minimize the effect of the two other colors since there is a risk of reaching too soon the 50% transition
due to the contribution of these 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
R5976694 IQ PRO R500 01/02/2007
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