<s>
Quattron	B-Device
is	O
the	O
brand	O
name	O
of	O
an	O
LCD	O
color	O
display	O
technology	O
produced	O
by	O
Sharp	O
Electronics	O
.	O
</s>
<s>
In	O
addition	O
to	O
the	O
standard	O
RGB	O
(	O
Red	O
,	O
Green	O
,	O
and	O
Blue	O
)	O
color	O
subpixels	O
,	O
the	O
technology	O
utilizes	O
a	O
yellow	O
fourth	O
color	O
subpixel	O
(	O
RGBY	B-Device
)	O
which	O
Sharp	O
claims	O
increases	O
the	O
range	O
of	O
displayable	O
colors	O
,	O
and	O
which	O
may	O
mimic	O
more	O
closely	O
the	O
way	O
the	O
brain	O
processes	O
color	O
information	O
.	O
</s>
<s>
The	O
technology	O
is	O
used	O
in	O
Sharp	O
's	O
Aquos	B-Application
LCD	O
TV	O
product	O
line	O
,	O
particularly	O
in	O
models	O
with	O
screens	O
40inches	O
across	O
and	O
larger	O
.	O
</s>
<s>
It	O
was	O
at	O
first	O
introduced	O
as	O
“	O
sub-pixel	O
color	O
technology	O
”	O
and	O
then	O
later	O
coined	O
into	O
Quattron	B-Device
technology	O
by	O
Linda	O
Lim	O
from	O
Sharp	O
Malaysia	O
.	O
</s>
<s>
The	O
later	O
version	O
was	O
known	O
as	O
Quattron	B-Device
Pro	O
with	O
further	O
subdivided	O
pixels	O
applied	O
to	O
its	O
HDTV	O
range	O
.	O
</s>
<s>
Color	O
researchers	O
at	O
Queen	O
Mary	O
University	O
of	O
London	O
investigated	O
the	O
Quattron	B-Device
technology	O
and	O
found	O
that	O
although	O
Quattron	B-Device
does	O
have	O
four	O
physical	O
color	O
sub-pixels	O
,	O
it	O
does	O
not	O
have	O
a	O
fourth	O
primary	O
in	O
the	O
backlight	O
to	O
drive	O
it	O
(	O
yellow	O
is	O
approximately	O
575nm	O
)	O
.	O
</s>
<s>
In	O
other	O
words	O
,	O
Quattron	B-Device
has	O
a	O
yellow	O
sub-pixel	O
to	O
let	O
light	O
through	O
,	O
but	O
the	O
manufacturer	O
has	O
not	O
made	O
any	O
provision	O
to	O
produce	O
the	O
yellow	O
light	O
needed	O
to	O
pass	O
through	O
it	O
.	O
</s>
