<s>
An	O
active	B-Device
pen	I-Device
(	O
also	O
referred	O
to	O
as	O
active	B-Device
stylus	I-Device
)	O
is	O
an	O
input	O
device	O
that	O
includes	O
electronic	O
components	O
and	O
allows	O
users	O
to	O
write	O
directly	O
onto	O
the	O
display	O
of	O
a	O
computing	O
device	O
such	O
as	O
a	O
smartphone	B-Application
,	O
tablet	B-Device
computer	I-Device
or	O
ultrabook	B-Device
.	O
</s>
<s>
The	O
active	B-Device
pen	I-Device
marketplace	O
has	O
long	O
been	O
dominated	O
by	O
N-trig	B-Device
and	O
Wacom	O
,	O
but	O
newer	O
firms	O
Atmel	O
and	O
Synaptics	B-Language
also	O
offer	O
active	B-Device
pen	I-Device
designs	O
.	O
</s>
<s>
An	O
active	B-Device
pen	I-Device
is	O
generally	O
larger	O
and	O
has	O
more	O
features	O
than	O
a	O
stylus	B-Device
.	O
</s>
<s>
Digital	B-Device
pens	I-Device
typically	O
contain	O
internal	O
electronics	O
and	O
have	O
features	O
such	O
as	O
touch	O
sensitivity	O
,	O
input	O
buttons	O
,	O
memory	O
,	O
writing	O
data	O
transmission	O
capabilities	O
,	O
and	O
electronic	O
erasers	O
.	O
</s>
<s>
The	O
main	O
difference	O
between	O
an	O
active	B-Device
pen	I-Device
and	O
the	O
input	O
device	O
known	O
as	O
a	O
passive	B-Device
stylus	I-Device
or	O
passive	O
pen	O
is	O
that	O
although	O
the	O
latter	O
can	O
also	O
be	O
used	O
to	O
write	O
directly	O
onto	O
the	O
screen	O
,	O
it	O
does	O
not	O
include	O
electronics	O
and	O
thus	O
lacks	O
all	O
of	O
the	O
features	O
that	O
are	O
unique	O
for	O
an	O
active	B-Device
pen	I-Device
:	O
touch	O
sensitivity	O
,	O
input	O
buttons	O
,	O
etc	O
.	O
</s>
<s>
Active	B-Device
pen	I-Device
devices	O
support	O
most	O
modern	O
operating	B-General_Concept
systems	I-General_Concept
,	O
including	O
Google	B-Application
's	I-Application
Android	I-Application
and	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
Active	B-Device
pens	I-Device
are	O
typically	O
used	O
for	O
note	O
taking	O
,	O
on-screen	O
drawing/painting	O
and	O
electronic	B-Protocol
document	I-Protocol
annotation	O
,	O
as	O
well	O
as	O
accurate	O
object	O
selection	O
and	O
scrolling	O
.	O
</s>
<s>
When	O
used	O
in	O
conjunction	O
with	O
handwriting	B-Application
recognition	I-Application
software	O
,	O
the	O
active	B-Device
pen	I-Device
's	O
handwritten	O
input	O
can	O
be	O
converted	O
to	O
digital	O
text	O
,	O
stored	O
in	O
a	O
digital	B-Protocol
document	I-Protocol
,	O
and	O
edited	O
in	O
a	O
text	O
or	O
drawing	O
application	O
.	O
</s>
<s>
Additional	O
features	O
enabled	O
by	O
the	O
active	B-Device
pen	I-Device
's	O
electronics	O
include	O
palm	O
rejection	O
to	O
prevent	O
unintended	O
touch	O
inputs	O
,	O
and	O
hover	O
,	O
which	O
allows	O
the	O
computer	O
to	O
track	O
the	O
pen	O
's	O
location	O
when	O
it	O
is	O
held	O
near	O
,	O
but	O
not	O
touching	O
the	O
screen	O
.	O
</s>
<s>
Most	O
active	B-Device
pens	I-Device
feature	O
one	O
or	O
more	O
function	O
buttons	O
(	O
e.g.	O
</s>
<s>
There	O
is	O
a	O
new	O
technological	O
generation	O
of	O
active	O
capacitive	O
devices	O
compatible	O
with	O
multitouch	B-Application
screens	I-Application
that	O
allow	O
seeing	O
the	O
tip	O
while	O
drawing	O
a	O
fine	O
line	O
on	O
the	O
screen	O
,	O
giving	O
an	O
accuracy	O
impossible	O
to	O
achieve	O
with	O
a	O
finger	O
,	O
as	O
this	O
covers	O
the	O
point	O
of	O
contact	O
when	O
drawing	O
or	O
writing	O
.	O
</s>
<s>
(	O
multitouch	B-Application
capacitive	O
technology	O
is	O
originally	O
designed	O
to	O
be	O
activated	O
by	O
fingers	O
)	O
,	O
</s>
<s>
Some	O
typical	O
passive	B-Device
stylus	I-Device
include	O
a	O
large	O
tip	O
made	O
of	O
rubber	O
or	O
conductive	O
foam	O
in	O
order	O
to	O
emulate	O
a	O
user	O
's	O
finger	O
,	O
rather	O
than	O
the	O
more	O
accurate	O
ballpoint	O
pen-like	O
tip	O
used	O
in	O
the	O
active	B-Device
pen	I-Device
.	O
</s>
<s>
Active	B-Device
pens	I-Device
carried	O
out	O
by	O
manufacturers	O
such	O
as	O
Wacom	O
Pro	O
Pen	O
2	O
and	O
Huion	O
PW500/PW507	O
can	O
support	O
8,192	O
levels	O
of	O
pressure	O
sensitivity	O
and	O
tilt	O
recognition	O
with	O
accuracy	O
.	O
</s>
<s>
Tilt	O
feature	O
of	O
the	O
active	B-Device
pen	I-Device
helps	O
create	O
natural-looking	O
pen	O
,	O
brush	O
,	O
and	O
eraser	O
strokes	O
in	O
applications	O
that	O
support	O
tilt	O
sensitivity	O
.	O
</s>
<s>
Active	O
Active	B-Device
pens	I-Device
,	O
such	O
as	O
N-trig	B-Device
'	O
s	O
DuoSense	O
Pen™	O
,	O
include	O
electronic	O
components	O
whose	O
signals	O
are	O
picked	O
up	O
by	O
a	O
mobile	O
device	O
's	O
built-in	O
digitizer	O
and	O
transmitted	O
to	O
its	O
controller	O
,	O
providing	O
data	O
on	O
pen	O
location	O
,	O
pressure	O
,	O
button	O
presses	O
and	O
other	O
functionality	O
.	O
</s>
<s>
Positional	O
Position-based	O
digital	B-Device
pens	I-Device
use	O
a	O
facility	O
to	O
detect	O
the	O
location	O
of	O
the	O
tip	O
during	O
writing	O
.	O
</s>
<s>
Some	O
models	O
can	O
be	O
found	O
on	O
graphics	B-Device
tablets	I-Device
made	O
popular	O
by	O
Wacom	O
,	O
and	O
on	O
tablet	B-Device
computers	I-Device
using	O
Wacom	O
's	O
Penabled	O
technology	O
.	O
</s>
<s>
Capacitive	O
(	O
multitouch	B-Application
compatible	O
)	O
Capacitive	O
pens	O
multitouch	B-Application
compatible	O
,	O
generate	O
a	O
signal	O
used	O
by	O
multitouch	B-Application
screen	I-Application
to	O
detect	O
the	O
location	O
of	O
the	O
tip	O
during	O
its	O
movement	O
while	O
writing	O
or	O
drawing	O
.	O
</s>
<s>
They	O
are	O
compatible	O
with	O
most	O
smartphones	B-Application
and	O
tablets	B-Device
with	O
capacitive-multitouch	B-Application
screen	I-Application
as	O
iPhone	B-Device
,	O
iPad	B-Device
,	O
Samsung	B-Application
,	O
LG	O
,	O
etc	O
.	O
</s>
