Adjusting The Color Balance - Ikegami HTM-1517R Operation Manual

Set only the B.SCREEN switch to ON (blue screen
only), adjust the B.BACKGROUND data so that
the blue line at Part B in the Fig. 4-6-2 illumi-
nates slightly.
If any of the R., G. and B. BACKGROUND data is
not yet properly adjusted, slightly move the
SCREEN switch of the flyback transformer on the
HV OUT board to readjust the relevant BACK-
GROUND data.
⑤Adjusting the high light portion
Return the SET UP and SCREEN switches to
OFF.
Pay attention to the high light portion of the stair-
case wave, and adjust the G/B GAIN to the desired
color temperature.
⑥ Adjusting the low light portion
Pay attention to the low light portion of the stair-
case wave, and adjust the R/G/B BACKGROUND
to the desired color temperature.
⑦ As the ⑤ and ⑥ adjustments interfere with each
other, repeat them until the desired color tempera-
ture is acquired from low light to high light.
d) Adjustment procedure 2 (Using the color analyzer)
To adjust the color temperature of the monitor us-
ing a commercially available color analyzer, adjust
the G/B GAIN and R/G/B BACKGROUND of the
monitor so that the chromaticity points (x, y) mea-
sured with the color analyzer becomes the follow-
ing values.
CIE Chromaticity Points (x, y) in Relation to
Color Temperature
Color Temperature
6500K
9300K
① Input signal
Input a window signal or select the internal TEST
signal (window signal).
② Setting the file
Select the file whose white balance you want to
change.
Adjust BRIGHTNESS and CONTRAST before ad-
justing the white balance.
③ Adjusting R.BACKGROUND
The white balance is adjusted with red for refer-
ence. First make the R.BACKGROUND setting.
Set the SET UP switch in the drawer panel to
ON, and set as shown in Fig. 4-6-2.
Set only the R.SCREEN switch to ON (red screen
only), and adjust the R.BACKGROUND data so
that the red line at Part B in the figure illumi-
nates slightly.
X Y
0.313 0.329
0.283 0.297
Return the SET UP and SCREEN switches to
their original settings (OFF), and do not move
R.BACKGROUND thereafter.
④ Setting CONTRAST
Set CONTRAST to MANUAL, and contact the
probe at the center of the window signal displayed
on the screen. Preset the luminance value to
approx. 5nit (cd/m
eration.
The MANUAL luminance value set here changes
as the white balance is adjusted. Therefore check
the luminance every time you adjust the low light
portion, and readjust the luminance if deviated.
A deviation of approx. ±2nit (±0.5fL) is allowed.
⑤Setting the chromaticity points (x, y) during
high light
Set CONTRAST to PRESET, and set the chroma-
ticity points (x, y) in the high light portion as fol-
lows using G/B GAIN.
1. First adjust B.GAIN so that the chromaticity point
x becomes the specified value.
2. Next adjust G.GAIN so that the chromaticity point
y becomes the specified value.
3. Repeat adjusting the chromaticity points (x, y) un-
til they settle to the specified values. Adjusting
the low light portion later will cause the chroma-
ticity point during high light to deviate. Therefore
go on to adjust the low light portion when the speci-
fied value is approached in the initial adjustment
stage.
⑥ Setting the chromaticity points (x, y) during
low light
Set CONTRAST to MANUAL, and set the chro-
maticity points (x, y) in the low light portion as
follows using G/B BACKGROUND.
1. First adjust the chromaticity point x to the speci-
fied value using B.BACKGROUND.
2. Next adjust the chromaticity point y to the speci-
fied value using G.BACKGROUND.
3. Repeat adjusting the chromaticity points (x, y) until
they settle to the specified values. Adjusting the
low light portion will cause the chromaticity point
during high light to deviate. Therefore adjust the
high light portion again when the specified value is
approached in the initial adjustment stage.
⑦The adjustments are complete when the chroma-
ticity points of both low light and high light por-
tions have settled at the specified values.
28
2
) or 1.5fL using MANUAL op-