Sharp LC-32LE280X, Service Manual

Page: 21 / 67

Multi point
adj. Mode
MSET0000
WBI20255
Point 2
WBI20 229
MG2G****
MG2B****
MG2R****
Point 1
WBI100 40
MG1G****
MG1B****
MG1R****
Write
MSET0003
Set
Max.Level
MGMG****
MGMR****
MGMB****
(8) Calculation Initial setting of
R/G/B_HIGH
(9) Set Initial setting of
R/G/B_HIGH
(10) Original WB adjustment is performed (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.
(11) Measurement HIGH Brightness
(Set) R_HIGH= G_HIGH
G_HIGH= G_HIGH
B_HIGH= G_HIGH
(12) Calculation MAX luminance after WB
ADJ set to γ=2.2 (L
XHG
)
(13) Set R/G/B_MAX
(14) Calculation LOW luminance ( γ=2.2)
(15) Calculation Initial setting of
R/G/B_LOW
(16) Set Initial setting of R/G/B_LOW
(17) Original WB adjustment is performed (LOW).
Adjust RB to the reference value of point 1.
(18) Adjusted value is writing at [command]
MSET0003
(19) Calculate the slope R2
slope,
G2
slope,
B2
slope
between MAX and Point2.
R2
slope =
(R
max
- R
high
)/(4080- 3664 )
(20) Calculate the correction value
⊿
R
high,
⊿
G
high,
⊿
B
high.
⊿ R
high =
R2
slope X
( 3840-3664 )
(21)
Set the reference value R,G,B of point 2
(R2
’
)=R2+
⊿
R
high
(22)
Calculate the slope R1
slope,
G1
slope,
B1
slope
between Point2 and Point1.
R1
slope =
(R
high
- R
low
)/( 3664 - 640 )
(23)
Calculate the correction value
⊿
R
low,
⊿
G
low,
⊿
B
low.
⊿
R
low =
R1
slope X
( 717-640 )
(24)
Set the reference value R,G,B of point 1
(R1
’
)=R1+
⊿
R
low
(25) Shut down the AC power.
※
Initial value at RGB 2 point : 3664
※
Initial value at RGB 1 point : 640
[Adjustment value]
☆
Teaching set send by engineering dept is set as
reference.
WB
HX
=WB
MAX
X ((L
H22
-L
min
)/(L
max
-L
min
))^(1/H γ )=3703
R_HIGH=WB
HX
’=3703
G_HIGH=WB
HX
’=3703
B_HIGH=WB
HX
’=3703
R_HIGH=3702
G_HIGH=3641
B_HIGH=3703
R_HIGH=3641
G_HIGH=3641
L
XHG
=
231.3
B_HIGH=3641
L
XMX
=L
XHG
/((W
B
H
/WB
MAX
)^2.2)=293.04
R_MAX=G_MAX*(R_HIGH/G_HIGH)=4078
G_MAX=WB
MAX
X ((L
XMX
-L
min
)/(L
max
-L
min
))^(1/H γ )=4010
B_MAX=G_MAX*(B_HIGH/G_HIGH)=4078
L
XLX
=(L
XMX
-L
min
) x (WB
L
/WB
MAX
)^2.2+L
min
=5.08
WB
LX
=WB
MAX
X ((L
XLX
-L
min
)/(L
max
-L
min
))^(1/L γ )=901
R_LOW=WB
XLX
=901
G_LOW=WB
XLX
=901
B_LOW=WB
XLX
=901
R_LOW= 921
G_LOW=901
B_LOW=971
RESULT
RESULT