<s>
Passive	B-Device
matrix	I-Device
addressing	I-Device
is	O
an	O
addressing	B-General_Concept
scheme	I-General_Concept
used	O
in	O
early	O
LCDs	B-Device
.	O
</s>
<s>
This	O
is	O
a	O
matrix	O
addressing	B-General_Concept
scheme	I-General_Concept
meaning	O
that	O
only	O
m+n	O
control	O
signals	O
are	O
required	O
to	O
address	O
an	O
mn	O
display	O
.	O
</s>
<s>
A	O
pixel	B-Algorithm
in	O
a	O
passive	B-Device
matrix	I-Device
must	O
maintain	O
its	O
state	O
without	O
active	O
driving	O
circuitry	O
until	O
it	O
can	O
be	O
refreshed	O
again	O
.	O
</s>
<s>
The	O
select	O
voltage	O
determines	O
the	O
row	O
that	O
is	O
being	O
addressed	O
and	O
all	O
n	O
pixels	B-Algorithm
on	O
a	O
row	O
are	O
addressed	O
simultaneously	O
.	O
</s>
<s>
When	O
pixels	B-Algorithm
on	O
a	O
row	O
are	O
being	O
addressed	O
,	O
a	O
Vsel	O
potential	O
is	O
applied	O
,	O
and	O
all	O
other	O
rows	O
are	O
unselected	O
with	O
a	O
Vunsel	O
potential	O
.	O
</s>
<s>
An	O
on-switched	O
(	O
lit	O
)	O
pixel	B-Algorithm
corresponds	O
to	O
a	O
Von	O
,	O
an	O
off-switched	O
(	O
unlit	O
)	O
corresponds	O
to	O
a	O
Voff	O
potential	O
.	O
</s>
<s>
Passive	B-Device
matrix	I-Device
addressed	O
displays	O
,	O
such	O
as	O
Ferro	B-Device
Liquid	I-Device
Display	I-Device
,	O
do	O
not	O
need	O
the	O
switch	O
component	O
of	O
an	O
active	B-General_Concept
matrix	I-General_Concept
display	O
,	O
because	O
they	O
have	O
built-in	O
bistability	O
.	O
</s>
<s>
Displays	O
with	O
bistable	O
pixel	B-Algorithm
elements	O
are	O
addressed	O
with	O
a	O
passive	B-Device
matrix	I-Device
addressing	I-Device
scheme	O
,	O
whereas	O
TFT	O
LCD	B-Device
displays	I-Device
are	O
addressed	O
using	O
active	B-General_Concept
addressing	I-General_Concept
.	O
</s>
