<s>
In	O
cathode-ray	B-Device
tube	I-Device
(	O
CRT	B-Device
)	O
,	O
or	O
computer	B-Device
display	I-Device
terminology	O
,	O
a	O
triad	B-General_Concept
is	O
a	O
group	O
of	O
3	O
phosphor	O
dots	O
coloured	O
red	O
,	O
green	O
,	O
and	O
blue	O
on	O
the	O
inside	O
of	O
the	O
CRT	B-Device
display	I-Device
of	O
a	O
computer	B-Device
monitor	I-Device
or	O
television	O
set	O
.	O
</s>
<s>
By	O
directing	O
differing	O
intensities	O
of	O
electron	O
beams	O
onto	O
the	O
3	O
phosphor	O
dots	O
,	O
the	O
triad	B-General_Concept
will	O
display	O
a	O
colour	O
by	O
combining	O
the	O
red	O
,	O
green	O
and	O
blue	O
elements	O
.	O
</s>
<s>
However	O
,	O
triads	B-General_Concept
are	O
not	O
pixels	B-Algorithm
,	O
and	O
multiple	O
triads	B-General_Concept
will	O
form	O
one	O
logical	O
pixel	B-Algorithm
of	O
the	O
displayed	O
image	O
.	O
</s>
<s>
In	O
liquid-crystal	B-Device
display	I-Device
(	O
LCD	B-Device
)	O
,	O
colours	O
are	O
similarly	O
composed	O
of	O
these	O
3	O
fundamental	O
colours	O
.	O
</s>
