Sharp LC-32LE150M Service Manual page 17

B. WHITE BALANCE ADJUSTMENT
a) White Balance Adjustment
N
ITEM C O N I D
O.
1 Setting Backlight : MAX
AV Mode : DYNAMIC
Active Backlight :
OFF
Set the luminance
meter on the centre
of the screen
2 Auto
Adjustment
Initial setting
(1) Measurement
[command]
(2) Set
Adjustment (3) Measurement
Mode (4) Measurement
KRSW0001
KKT10037
(5) Calculation
(6) Calculation
Setting
KYOF0001
(7) Calculation
OSDS0001
SBSL0016 (8) Calculation
R/G/B_HIGH
Multi point
adj. Mode
(9) Set
MSET0000
R/G/B_HIGH
WBI20255
(10) Original WB adjustment is performed (HIGH)
Point 2
Set the specified gradation for point 2, fix the
WBI20204 most faint colour to get reference value,
MG2G**** adjust others 2 colours to minus adjustment
MG2B**** for reference value of point 2.
MG2R****
(11) Measurement
Point 1
WBI10051
MG1G****
MG1B****
MG1R**** (12) Calculation
Write
(13) Set
MSET0003
(14) Calculation
(15) Calculation
Set
(16) Set
Max.Level
MGMG****
(17) Original WB adjustment is performed (LOW).
MGMR****
Set the specified gradation for point 1. Set G of
MGMB****
point 1 to the default value [(R1 x G value of
point 2/R2), with fractions rounded] and adjust
RB to the reference value of point 1.
I T O N
For the details of white balance adjustment procedure, please refer to white balance
adjustment spec for Kameyama model.
1. Confirm the set condition.
2. Connect the white balance jig.
3. Through RS-232C command, adjustment mode screen is displayed.
Panel Contrast
R/G/B_MAX
R/G/B_HIGH
R/G/B_LOW
MAX Brightness
MIN Brightness
HIGH Brightness
LOW Brightness
H
L
HIGH luminance ( =2.2)
Initial setting of
Initial setting of
HIGH Brightness
(Set) R_HIGH= G_HIGH
G_HIGH= G_HIGH
B_HIGH= G_HIGH
MAX luminance after WB
ADJ set to =2.2 (L
XHG
R/G/B_MAX
LOW luminance ( =2.2)
Initial setting of R/G/B_LOW
Initial setting of R/G/B_LOW
6 – 4
P R O C E D U R E
C
= 1200:1
nt
Example: G6 panel also use for G8/
WB
= 4080
MAX
WB
H
= 3264/4080 CSOT, CMI (be careful of INT setting)
WB
L
= 816/4080
L =305.7 cd/m²
max
L = L /C = 0.102
min max nt
L =235.1 cd/m²
XH
L =2.06 cd/m²
XL
H =LOG((L -L )/(L
min max
XH
L =LOG((L -L ) /(L
min max
XL
L =(L -L ) x (WB
max min
H22 H
WB =WB X ((L -L
HX MAX H22
R_HIGH=WB '=3703
HX
G_HIGH=WB '=3703
HX
B_HIGH=WB '=3703
HX
R_HIGH=3702
G_HIGH=3641
RESULT
B_HIGH=3703
R_HIGH=3641
G_HIGH=3641
B_HIGH=3641
L =L /((W /WB
B
XMX XHG H MAX
R_MAX=G_MAX*(R_HIGH/G_HIGH)=4078
)
G_MAX=WB X ((L
MAX XMX
B_MAX=G_MAX*(B_HIGH/G_HIGH)=4078
L =(L -L ) x (WB
min
XLX XMX
WB =WB X ((L -L
LX MAX XLX
R_LOW=WB =901
XLX
G_LOW=WB =901
XLX
B_LOW=WB =901
XLX
R_LOW= 921
G_LOW=901
B_LOW=971
LC-32LE150M
-L ))/LOG(WB /WB )= 2.44
min
H MAX
-L ))/LOG(WB /WB )=2.73
min
L MAX
/WB )^2.2+L =241.31
min
MAX
)/(L -L ))^(1/H )=3703
min max min
L 231.3
=
XHG
)^2.2)=293.04
-L )/(L -L ))^(1/H )=4010
min max min
/WB )^2.2+L =5.08
min
L MAX
)/(L -L ))^(1/L )=901
min max min
RESULT