Samsung PN51F4500AFXZA E-Manual page 58

®
IB_ack optimizer
contrast ratio,
%
%
Deepens blacks on the screen and improves the
When the TV is connected to a PC, IB_ k optimizer deactivated,
When the TV is operating other features, IB_ k optimizer is deactivated,
(ex, M ed ia IR_ay,IR II l iP)
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