Philips BDL4230E/00, Service Manual

Page: 27 / 122

BDL4230E LCD 27
Color Adjustment
Color adjustment
(1). Input source set the YPbPr (VGA / DVI / HDMI) input
(2). After ADC Calibration
(3). Set the picture mode to standard mode at user OSD
(4). Set input timing to SDTV480P with“80% white” pattern
(5). Enter factory OSD, select Color Temp Turning.
(6). Use CA210 read the color coordinate.
(7). Adjust the Red, Green, Blue driver to let the color coordinate to meet
the table1 spec.
(8). Go to step (6) until the 80% white pattern meet the table 1 spec.
(9). Add the following “offset” values to drive/offset values of
10000°KColor Temperature to get9300°K Color Temperature.
(10). Add the following “offset” values to drive/offset values of
6500°KColor Temperature to get 5800°K Color Temperature.
YPbPr (VGA / DVI / HDMI)
Color
Temp R drive G drive B drive R offset G offset B offset
9300°
K
10000°
K R -2 10000°
K G +0 10000°
K B
+5 10000°
K R +0 10000°
K G
+0 10000°
K B
+0
Color
Temp R drive G drive B drive R
offset G
offset B
offset
5800°K 6500°K
R +8
6500°K
G +0 6500°K
B -15 6500°K
R +0 6500°K
G
+0 6500°K
B
+0
Video Color adjustment
(1). Input source set the CVBS1 (CVBS2 / S-Video) input.
(2). Set the picture mode to standard mode at user OSD.
(3). Setup input timing to NTSC with“80% white” pattern
(4). Enter factory OSD, select Color Temp Turning
(5). Use CA210 read the color coordinate.
(6). Adjust the Red, Green, Blue driver to let the color coordinate to meet
the table1 spec.
(7). Go to step (5) until the 80% white pattern meet the table 1 spec.
(8). Add the following “offset” values to drive/offset values of 10000°K
Color Temperature to get 9300°K Color Temperature.
(9). Add the following “offset” values to drive/offset values of 6500°K
Color Temperature to get 5800°K Color Temperature.
CVBS1 (CVBS2 / S-VIDEO)
Color
Temp R drive G drive B drive R offset G
offset B offset
9300°
K 10000°
K R
+0 10000°
K G
+0 10000°
K B -8 10000°
K R
+0 10000°
K G
+0 10000°
K B
+0
Color
Temp R drive G drive B drive R
offset G
offset B
offset
5800°K 6500°K
R +8
6500°K
G +0 6500°K
B -14 6500°K
R +0 6500°K
G
+0 6500°K
B
+0
Screen Uniformity
Fig.1 Optical measurement point
(1). Timing SDTV480P @ 60Hz , YPbPr source
(2). DEFAULT the unit and select the ANSI BRIGHTNESS GRID
pattern.
(3). Change the unit to MAX/MAX for Contrast/Brightness , Color
temperature default setting 9300°K.
(4). Surface luminance is luminance value at point 1 across the LCD
surface 50cm from the surface with all pixels displaying white.
From more information see Fig. When VDDB =24V,IDDB = 12.5 A.
LWH=Lon1, Where Lon1 is the luminance with all pixels displaying
white at center 1 location. just for reference , no spec.
(5). Position the CA-210 at the locations indicated on the grid , there
are 9 points see Fig .1. Measure and Record the values when the
GRID is OFF.
(6). Panel spec brightness minimum 400 nits , typical 500 nits ,
Luminance Variation 1.3(Max). The variation in surface luminance,
WHITE is defined under 100% brightness as:
ǻ
white(9P)=Maximum(Lon1, Lon2,…,Lon9)/Minimum(Lon1,
Lon2,…Lon9)
Spec and Table list
(1). Reference: The variance of color coordinate via Red, Green, Blue :
X Y
Red drive
p
x
p -
Green drive p
-
Y p
Blue drive
p
x
n
Y
n
Red offset n x n
-
Green offset
n -
Y
n
Blue offset n x p Y p
(2). Table 1-1,1-2,1-3 : Color temperature spec
User OSD (AV Signal Black Level =40 Δ contrast =72)
(YPbPr Signal Black Level=49, contrast =55)
(VGA Signal Black Level =48, contrast
= 50)
Table 1-1
Color temp item
@factory OSD CVBS1 / CVBS2 / S-VIDEO / VGA /
YPbPr / DVI / HDMI
Color temperature 10000 q K
x 0.278
r
0.01
y 0.291
r
0.01
Table 1-2
Color temp item
@factory OSD CVBS1 / CVBS2 / S-VIDEO / VGA /
YPbPr / DVI / HDMI
Color temperature 9300 q K
x 0.283
r
0.01
y 0.298
r
0.01
Table 1-3
Color temp item
@factory OSD CVBS1 / CVBS2 / S-VIDEO / VGA /
YPbPr / DVI / HDMI
Color temperature 6500
q
K
x 0.312
r
0.01
y 0.329 r 0.01
Table 1-4
Color temp item
@factory OSD CVBS1 / CVBS2 / S-VIDEO / VGA /
YPbPr / DVI / HDMI
Color temperature 5800 q K
x 0.326 r 0.01
y 0.342 r 0.01