Contrast, 4. typical gray bar pattern for adjusting contrast, Pre l iminar y – Runco SP-50 User Manual
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Runco CinemaWall SP-42/-50/-60 Owner’s Operating Manual
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PLUGE patterns vary but generally consist of some combination of black, white and gray
areas against a black background. The example above includes two vertical bars and four
shaded boxes.
Select Brightness from the Picture menu. Using the left- and right-arrow (
) buttons,
adjust the brightness so that:
• The darkest black bars disappear into the background.
• The dark gray areas are barely visible.
• The lighter gray areas are clearly visible.
• The white areas are a comfortable level of true white.
• The image contains only black, gray and white (no color).
Contrast: On your external test pattern source, select a stepped, gray-bar pattern like the
one shown in Figure 4-4.
Figure 4-4. Typical Gray Bar Pattern for Adjusting Contrast
Select Contrast from the Picture menu. Using the left- and right-arrow (
) buttons,
adjust the contrast to a point just below which the white rectangle starts to increase in
size.
Brightness and contrast controls are interactive. A change to one
may require a subtle change to the other in order to achieve the
optimum setting.
Note