<s>
Guest	B-Device
host	I-Device
displays	I-Device
are	O
similar	O
to	O
more	O
common	O
liquid	B-Device
crystal	I-Device
displays	I-Device
,	O
but	O
also	O
include	O
polymers	O
,	O
inorganic	O
particles	O
,	O
or	O
dichroic	O
dye	O
within	O
the	O
liquid	B-Device
crystal	I-Device
matrix	O
.	O
</s>
<s>
In	O
dichroic	O
dye	O
displays	O
,	O
as	O
the	O
birefringence	O
of	O
the	O
host	O
liquid	B-Device
crystals	I-Device
change	O
from	O
planar	O
to	O
perpendicular	O
orientation	O
,	O
the	O
guest	O
dyes	O
also	O
change	O
orientation	O
,	O
from	O
absorbing	O
/	O
planar	O
orientation	O
,	O
to	O
non-absorbing	O
/	O
perpendicular	O
orientation	O
.	O
</s>
<s>
Unlike	O
common	O
TN	O
(	O
Twisted	O
Nematic	O
)	O
or	O
STN	O
(	O
Super	O
Twisted	O
Nematic	O
)	O
liquid	B-Device
crystal	I-Device
displays	I-Device
,	O
guest	B-Device
host	I-Device
displays	I-Device
are	O
typically	O
driven	O
direct	O
,	O
and	O
are	O
not	O
usually	O
multiplex	B-Architecture
driven	O
.	O
</s>
<s>
In	O
addition	O
,	O
guest	B-Device
host	I-Device
displays	I-Device
usually	O
require	O
higher	O
operating	O
voltages	O
than	O
TN	O
or	O
STN	O
displays	O
.	O
</s>
<s>
For	O
example	O
,	O
the	O
polymer	O
dispersed	O
liquid	B-Device
crystal	I-Device
display	I-Device
(	O
also	O
called	O
a	O
P.D.L.C.	O
</s>
<s>
display	O
)	O
,	O
is	O
usually	O
operated	O
at	O
voltages	O
from	O
4.5	O
V	O
to	O
24	O
V	O
to	O
as	O
high	O
as	O
100	O
V	O
.	O
Similarly	O
,	O
dichroic	O
dye	O
containing	O
guest	B-Device
host	I-Device
displays	I-Device
,	O
require	O
voltages	O
from	O
4.5	O
V	O
to	O
10	O
V	O
and	O
higher	O
.	O
</s>
<s>
display	O
and	O
many	O
dichroic	O
dye	O
containing	O
guest	B-Device
host	I-Device
displays	I-Device
,	O
such	O
as	O
the	O
White-Taylor	O
Phase	O
Change	O
display	O
,	O
do	O
not	O
require	O
polarizers	O
,	O
which	O
is	O
a	O
significant	O
advantage	O
over	O
TN	O
or	O
STN	O
displays	O
.	O
</s>
<s>
Polarizer	O
free	O
displays	O
enable	O
low	O
cost	O
devices	O
,	O
since	O
the	O
polarizer	O
is	O
one	O
of	O
the	O
more	O
expensive	O
components	O
comprising	O
the	O
common	O
liquid	B-Device
crystal	I-Device
display	I-Device
.	O
</s>
<s>
In	O
some	O
cases	O
,	O
the	O
R2R	O
manufacturing	O
of	O
the	O
guest	B-Device
host	I-Device
displays	I-Device
can	O
be	O
integrated	O
with	O
other	O
roll	O
to	O
roll	O
manufacturing	O
process	O
.	O
</s>
<s>
and	O
A.C.F.	B-Device
</s>
<s>
Recent	O
advances	O
in	O
transparent	O
conductive	O
polythiophene	B-Algorithm
coated	O
substrates	O
make	O
display	O
electrodes	O
which	O
resist	O
cracking	O
and	O
breaking	O
,	O
unlike	O
common	O
oxide	O
based	O
transparent	O
conductors	O
.	O
</s>
<s>
Advances	O
in	O
Nanoimprint	B-Algorithm
Lithography	I-Algorithm
(	O
N.I.L.	O
)	O
</s>
<s>
Academic	O
research	O
and	O
development	O
is	O
currently	O
being	O
done	O
at	O
the	O
Glenn	O
H	O
.	O
Brown	O
Liquid	B-Device
Crystal	I-Device
Institute	O
at	O
Kent	O
State	O
University	O
,	O
at	O
the	O
Arizona	O
State	O
University	O
,	O
at	O
the	O
,	O
at	O
the	O
VTT	O
Technical	O
Research	O
Centre	O
,	O
at	O
,	O
at	O
the	O
University	O
of	O
Hamburg	O
,	O
and	O
at	O
the	O
University	O
of	O
Stuttgart	O
.	O
</s>
<s>
Guest	B-Device
host	I-Device
displays	I-Device
consume	O
electrical	O
current	O
much	O
more	O
slowly	O
than	O
l.e.d.s	O
(	O
light	O
emitting	O
diodes	O
)	O
,	O
giving	O
them	O
operating	O
life	O
spans	O
of	O
several	O
months	O
,	O
versus	O
the	O
short	O
lifespans	O
of	O
battery	O
operated	O
l.e.d.s.	O
</s>
<s>
Guest	B-Device
host	I-Device
displays	I-Device
commonly	O
comprise	O
liquid	B-Device
crystals	I-Device
,	O
polymer	O
or	O
inorganic	O
additives	O
,	O
twist	O
agent	O
,	O
and	O
optionally	O
,	O
dichroic	O
dyes	O
.	O
</s>
<s>
Liquid	B-Device
crystals	I-Device
are	O
distributed	O
by	O
Merck	O
(	O
DE	O
)	O
,	O
(	O
CN	O
)	O
,	O
and	O
(	O
US	O
,	O
CN	O
)	O
.	O
</s>
<s>
Liquid	B-Device
Crystals	I-Device
:	O
Applications	O
and	O
Uses	O
,	O
Volumes	O
1-3	O
,	O
edited	O
by	O
Birenda	O
Bahadur	O
,	O
World	O
Scientific	O
,	O
1992	O
.	O
</s>
<s>
Liquid	B-Device
Crystals	I-Device
In	O
Complex	O
Geometries	O
:	O
Formed	O
by	O
Polymer	O
And	O
Porous	O
Networks	O
,	O
edited	O
by	O
G	O
P	O
Crawford	O
,	O
S	O
Zumer	O
,	O
CRC	O
Press	O
,	O
1996	O
.	O
</s>
