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32
tive to one another, producing a range of intermediate colors.
Green
reaches its maximum brightness level as
blue
is starting to
turn on, so although
red
and
blue
are not on at the same time, they
both are on while
green
is on and mix with it.
In the next example, we’ll examine pulse width, using the “square”
waveform.
The square waveform is more accurately a
pulse
waveform since its
width may be varied. it turns from off to maximum brightness
(and vice-versa) almost immediately. The pulse can have a variable
width; if it is 50%, then it is a true square wave. In the example
pictured below, both blue and
green
have a width of about 40%,
while the
red
is narrow, about 10%.
Also illustrated is the effect of
phase shift
on the mixing of pulse-
width modulated color. Notice that
blue
and
red
turn on together,
starting at 0 phase. The color would be purple until red turns off,
then blue until green turned on, then blue-green.
Figure 5
.
Summary of Contents for Procyon AVS
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