Adjustment ( Lc-40Le280X ) - Sharp LC-32LE280X Service Manual

B. WHITE BALANCE ADJUSTMENT
a) White Balance Adjustment
NO
. ITEM
i Setting Backlight : MAX
AV Mode : DYNAMIC
Active Backlight : OFF
SUPER ECO : OFF
Set the luminance
meter on the centre of
the screen
ii Auto
Adjustment
[command]
(1) Measurement
Adjustment
(2) Set
Mode
(3) Measurement
KRSW0001
(4) Measurement
KKT10037
(5) Calculation
Setting
(6) Calculation
KYOF0001
OSDS0001
(7) Calculation
SBSL0016
(8) Calculation
Multi point
adj. Mode
MSET0000
(9) Set
WBI20255
Point 2
(10) Original WB adjustment is performed (HIGH)
WBI20229
MG2G****
MG2B****
MG2R****
(11) Measurement
(12) Calculation
(13) Set
Point 1
(14) Calculation
WBI10064
MG1G****
(15) Calculation
MG1B****
MG1R****
(16) Set
Write
(17) Original WB adjustment is performed (LOW).
CONDITION
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
Initial setting
R/G/B_HIGH
R/G/B_LOW
MAX Brightness
MIN Brightness
HIGH Brightness
LOW Brightness
H γ
Lγ
HIGH luminance (γ=2.2)
Initial setting of
R/G/B_HIGH
Initial setting of
R/G/B_HIGH
Set the specified gradation for point 2, fix the
most faint colour to get reference value,
adjust others 2 colours to minus adjustment
for reference value of point 2.
HIGH Brightness
(Set) R_HIGH= G_HIGH
G_HIGH= G_HIGH
B_HIGH= G_HIGH
MAX luminance after WB
ADJ set to γ=2.2 (L
R/G/B_MAX
LOW luminance (γ=2.2)
Initial setting of
Initial setting of
Adjust RB to the reference value of point 1.
PROCEDURE
C
= 3000:1 (CSOT Lite panel)
nt
WB
= 4080
MAX
WB
H = 3664
WB
L = 1024
L =305.7 cd/m²
max
L = L /C
min max
L =235.1 cd/m²
XH
L =2.06 cd/m²
XL
Hγ=LOG((L
XH
Lγ =LOG((L
XL
L =(L -L
max
H22
WB =WB
HX MAX
R_HIGH=WB
G_HIGH=WB
B_HIGH=WB
R_HIGH=3702
G_HIGH=3641
B_HIGH=3703
R_HIGH=3641
G_HIGH=3641
B_HIGH=3641
L =L /((W
XMX XHG
R_MAX=G_MAX*(R_HIGH/G_HIGH)=4078
)
G_MAX=WB
XHG
B_MAX=G_MAX*(B_HIGH/G_HIGH)=4078
L =(L -L
XLX XMX
WB =WB
LX MAX
R/G/B_LOW
R_LOW=WB
R/G/B_LOW G_LOW=WB
B_LOW=WB
R_LOW= 921
G_LOW=901
B_LOW=971
/4080
/4080
Example for adjustment method
= 0.102
nt
(be careful of INT setting)
-L )/(L -L ))/LOG(WB
min max min
-L ) /(L -L ))/LOG(WB
min max min
) x (WB /WB )^2.2+L
min
H MAX
X ((L -L )/(L -L
min max min
H22
'=3703
HX
'=3703
HX
'=3703
HX
RESULT
L 231.3
=
XHG
/WB )^2.2)=293.04
B
H MAX
X ((L -L )/(L -L
min max
MAX XMX
) x (WB /WB )^2.2+L
min
L MAX
X ((L -L )/(L -L
min max min
XLX
=901
XLX
=901
XLX
RESULT
=901
XLX
/WB )= 2.44
H MAX
/WB )=2.73
L MAX
=241.31
min
))^(1/H γ)=3703
))^(1/Hγ)=4010
min
=5.08
min
))^(1/Lγ)=901