<s>
Variable	B-General_Concept
refresh	I-General_Concept
rate	I-General_Concept
(	O
VRR	O
)	O
refers	O
to	O
a	O
dynamic	O
display	B-Device
that	O
can	O
continuously	O
and	O
seamlessly	O
change	O
its	O
refresh	O
rate	O
without	O
user	O
input	O
.	O
</s>
<s>
A	O
display	B-Device
supporting	O
a	O
variable	B-General_Concept
refresh	I-General_Concept
rate	I-General_Concept
usually	O
supports	O
a	O
specific	O
range	O
of	O
refresh	O
rates	O
(	O
e.g.	O
</s>
<s>
This	O
is	O
called	O
the	O
variable	B-General_Concept
refresh	I-General_Concept
rate	I-General_Concept
range	O
(	O
VRR	O
range	O
)	O
.	O
</s>
<s>
Variable	B-General_Concept
refresh	I-General_Concept
rates	I-General_Concept
eliminate	O
these	O
issues	O
by	O
matching	O
the	O
refresh	O
rates	O
of	O
a	O
display	B-Device
to	O
be	O
in	O
sync	O
with	O
the	O
frame	O
rate	O
from	O
a	O
video	O
input	O
,	O
making	O
the	O
display	B-Device
motion	O
more	O
smooth	O
.	O
</s>
<s>
In	O
this	O
regard	O
,	O
VRR	O
can	O
save	O
power	O
by	O
not	O
needlessly	O
refreshing	O
the	O
display	B-Device
when	O
no	O
new	O
frame	O
is	O
being	O
pushed	O
out	O
;	O
furthering	O
this	O
,	O
VRR	O
also	O
has	O
use	O
in	O
power	O
management	O
,	O
by	O
temporarily	O
lowering	O
the	O
refresh	O
rate	O
of	O
a	O
display	B-Device
during	O
instances	O
when	O
there	O
is	O
little	O
movement	O
on	O
the	O
screen	O
to	O
save	O
power	O
.	O
</s>
<s>
Vector	B-General_Concept
displays	I-General_Concept
had	O
a	O
variable	B-General_Concept
refresh	I-General_Concept
rate	I-General_Concept
on	O
their	O
cathode	B-Device
ray	I-Device
tube	I-Device
(	O
CRT	O
)	O
,	O
depending	O
on	O
the	O
number	O
of	O
vectors	O
on	O
the	O
screen	O
,	O
since	O
more	O
vectors	O
took	O
more	O
time	O
to	O
draw	O
on	O
their	O
screen	O
.	O
</s>
<s>
Since	O
the	O
2010s	O
decade	O
,	O
raster	B-Algorithm
displays	I-Algorithm
gained	O
several	O
industry	O
standards	O
for	O
variable	B-General_Concept
refresh	I-General_Concept
rates	I-General_Concept
.	O
</s>
<s>
Historically	O
,	O
there	O
was	O
only	O
a	O
limited	O
selection	O
of	O
fixed	O
refresh	O
rates	O
for	O
common	O
display	B-Device
modes	O
.	O
</s>
<s>
Variable	B-General_Concept
refresh	I-General_Concept
rate	I-General_Concept
display	I-General_Concept
technologies	O
include	O
several	O
industry	O
standards	O
and	O
proprietary	O
standards	O
:	O
</s>
