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Left picture is to show banding effect in edge
blending area.
This issue can be due to many factors:
•
Screen: gain value under 1.0 is
recommended
•
Projector: shall be the same model with
the same gamma and Display Mode
settings.
•
Usually DLP Laser projector will get the
best result due to accurate gamma and
color.
•
Signal content: to avoid pure color or
pure white color content. Multimedia is
the best.
•
Overlap range: too small overlap range
will cause banding effect. 20%-40% with
more than 60 cm width is recommended.
If the ambient light is dark, audience will see grey region in Edge Blending area. It is due to light
leakage from projector optical system and can’t be fixed by signal processing. Low contrast ratio
projector will be more serious. The only solution is to apply [Offset] function to uplift the color
in non-transition area to compensate the visual color difference.
Projector with higher native (not dynamic) contrast ratio will have less light leakage. Usually,
DLP projector will have higher contrast ratio with better result. Laser projector has high contrast
ratio with accurate color and gamma setting and is suitable for edge blending.
[Corner] function is to do accurate position alignment.
10.4
Black level uplift: [Offset] & [Corner] adjustment
