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Additional
flicker (screen)
English Wikipedia - The Free Encyclopedia
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Flicker (screen)
Flicker
is a
visible
fading between cycles displayed on
video displays
, especially the
refresh
interval on
cathode ray tube
(CRT) based
computer screens
. Flicker occurs on CRTs when they are driven at a low
refresh rate
, allowing the
brightness
to drop for time intervals sufficiently long to be noticed by a human eye – see
persistence of vision
and
flicker fusion threshold
. For most devices, the screen's
phosphors
quickly lose their excitation between sweeps of the
electron gun
, and the afterglow is unable to fill such gaps – see
phosphor persistence
. A similar effect occurs in
PDPs
during their refresh cycles.
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