
94-6 Displays and Recorders
corresponding to the above threshold QV loop of Figure 94.5 is shown in Figure 94.6. e Q
p
F
p
loop is use-
ful
be
cause
it ex
presses
th
e
in
ternal
el
ectrical
ch
aracteristics
of th
e
ph
osphor
la
yer
du
ring
dev
ice
op
eration
.
94.4.3 Device Excitation
Whether the device under test is a test dot or a matrix display, the drive waveform must be ac-coupled.
Pa
ssively
ad
dressed
ma
trix
di
splays
ar
e
sc
anned
on
e
ro
w
at a ti
me
. Da
ta
ar
e
lo
aded
in
to
th
e
co
lumn
dr
ivers
fo
r
a sin
gle
ro
w
of pi
xels
an
d
th
e
se
lected
pi
xels
in th
e
ro
w
ar
e
al
l
tu
rned
on sim
ultaneously
. e
ro
w
pu
lse
br
ings
th
e
vo
ltage
ac
ross
ea
ch
pi
xel
in th
e
ro
w
to a le
vel