The next step is brightness adjustment.
Please use lamps that have the same usage life for all projectors. If the lamps used have
different usage life, the brightness will not match. (The use of new lamps for all projectors
is strongly recommended).
If the projectors' brightness are different, it is necessary to make optical adjustment. Use the
internal all white test pattern. Use the internal all black test pattern.
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On 3 DLP use "manual iris" function to match optical brightness.
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On 1 DLP use "white gain" control of the color wheel white segment, to match optical
brightness.
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Do not use "contrast" or "brightness" electric control to match projectors' optical
brightness.
The room should be made as dark as possible. Increase brightness using BRIGHT INSIDE
from the BRIGHT ADJUST menu to make the [joined] part visible.
The next step is to reduce the brightness of the inside area produced by the excess light
from the opposite projector by changing the values of the top, bottom, left and right (UPPER,
LOWER, LEFT, RIGHT).
Then match the brightness of the overlapped area and the brightness increased using the
BRIGHT INSIDE adjustment. Finally, match the brightness of the area that has been
modified by changing the numbers from the effective image area using the brightness
outside (BRIGHT OUTSIDE) adjustment.
* The steps above describe the adjustments for making an area affected by excess light as
invisible as possible, and matching the brightness level of the two projectors. The excess
light outside the image area is almost at the same level as that inside but gradually fades
out towards the edge.
The best width should be determined in each location by considering the external light
coming into the screen.
Brightness level of the left projector
(Brightness level inside adjustment)
Excess light from the right
projector (Brightness level outside
adjustment)
Brightness level created by
the two projectors
Excess light from the left projector
(Brightness level outside adjustment)
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