PR-680/680L User Manual
9
d.
At the completion of the measurement, touch
Back.
e.
To use this measurement, touch
Recall
. To use a previously stored measurement, touch
Prev
or
Next
until the measurement of choice appears then touch
Recall.
8.
Once the
Illuminant
and
Source
and optional
Reference
have been selected and or measured,
the PR-680/680L / PR-680/680L is ready to perform L*u*v*, L*a*b* and optional Delta E
measurements. To perform these measurements:
a.
Press the
MEASURE button
on the top of the instrument. A result screen similar to the
following appears:
FIGURE 54 - L*U*V* RESULT SCREEN
In this example,
Delta E
has been selected in the
Measurement Mode
setup screen. The
displayed values of
x, y, u’, v’, u, v, CCT, mk
-1,
and
dev
are the measured values of the
sample.
RGB
D
ISPLAY
C
AL
The
PR-650
R
G
B
measurement mode is designed to provide the user with a convenient, spectrally based
interactive method of performing white point calibrations of CRT’s, LCD’s PDP’s and digital projectors or
any other display technology that features adjustable RGB channels.
During use, the user is presented with a bar graph and numerical levels indicating the deviation
amplitude and direction of the three
R
G
B
primaries from the target settings. Once the RGB levels of the
display are adjusted to the target values set by the
R
G
B
algorithm, the white point is properly adjusted.
Since the
PR-680/680L
are spectrally based systems, color matching can be achieved without having a
“golden sample” available as a reference. White point calibrations can be based on user entered target
values including luminance and CIE chromaticity coordinates (CIE 1931 x, y values). The user can also
select pre-stored phosphor sets (NTSC, EBU, CIE, HDTV and SMPTE) or create user phosphor values
through measurement or data entry.