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4-3-1 Color Coordinates (Temperature)
Color temperature is a measurement of the
radiant energy transmitted by a color. For
computer monitors, the color temperature refers
to the radiant energy transmitted by white. Color
coordinates are the X and Y coordinates on the
chromaticity diagram of wavelengths for the
visible spectrum.
CONDITIONS
Measurement instrument: Color analyzer
Scanning frequency:
68 kHz/85 Hz
Display Size
:
355 (H) x 266 (V)/920C ~ 310 X 232/720C
Display image:
White flat field at
center of display area
Brightness:
Cut-off
Contrast:
Maximum
PROCEDURE
Use the directions in sections 4-3-2 through 4-3-4
to adjust the color coordinates for:
9300K to x = 0.283 ± 0.02, y = 0.29
7
± 0.02
6500K to x = 0.313 ± 0.02, y = 0.329 ± 0.02
5000K to x = 0.346 ± 0.02, y = 0.359 ± 0.02
4-3-2 Color Adjustments for 9300K
4-3-2 (a) BACK RASTER COLOR ADJUSTMENT
CONDITIONS
Scanning frequency:
68 kHz/85 Hz
Display image:
Back raster pattern
Brightness:
Cut-off
Contrast:
Maximum
1. Select
COLOR CHANNEL 1
to control the
color for 9300K.
2. Adjust the luminance of the back raster to
between 0.3 to 1ft-L using the
G_CUT
controls.
3. Click on the << or >> box next to
B_CUT
to
set the ÒyÓ coordinate to 0.
297
± 0.02.
4. Click on the << or >> box next to
R_CUT
to
set the ÒxÓ coordinate to 0.283 ± 0.02.
Note:
If the above adjustments cannot be
done to each coordinate, click on the
<< or >> box next to
G_CUT
to decrease
or increase the green cutoff (bias) and
repeat procedures 2 and 3.
4-3-2 (b) G-GAIN ADJUSTMENT
Figure 4-8. Green Box Pattern
CONDITIONS
Scanning frequency:
68 kHz/85 Hz
Display image:
Green box pattern
Brightness:
Cut-off
Contrast:
Maximum
1. Click on the << or >> box next to
G_GAIN
to
adjust the brightness of the Green Gain to
25 ± 1 ft-L.
Note:
If you canÕt increase the Green Gain to
the appropriate value, click on the >>
box next to increase the
ABL
point.
4-3-2 (c) WHITE BALANCE ADJUSTMENT
CONDITIONS
Scanning frequency:
68 kHz/85 Hz
Display image:
Full white pattern
Brightness:
Cut-off
Contrast:
Maximum
Figure 4-9. Full White Pattern
1. Click on the << or >> boxes next to
R_GAIN
and
B_GAIN
to make the video white.
(For 9300K color adjustment:
x = 0.283 ± 0.02, y = 0.
297
± 0.02.)
Note:
Do not touch the
G_GAIN
controls.
2. Check the ABL. If it is not within the
specifications (30 ± 1 ft-L), use the ABL
controls to adjust it.
3. Select
COLOR FACTORY SAVE
to save the
data.
4 Alignment and Adjustments
720C/920C
4-5
4-3 Color Adjustments
1/3H-1/2H
1/3V-1/2V
FRONT BEZEL OPENING
BACK RASTER
GREEN WINDOW
FRONT BEZEL OPENING
BACK RASTER
WHITE WINDOW
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