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HP L1902 Service Manual
Page 12 of 69
5.2 Optical Characteristics
LG LM190E03
Ta= 25
°
C, V
LCD
=5.0V, f
V
=60Hz ,D
clk
=54MHz
Values
Parameter Symbol
Min Typ Max
Units Notes
Contrast Ratio
CR
300
500
-
1
Surface Luminance, white
L
WH
200
250 - cd/m² 2
Luminance Variation
δ
WHITE
5P
1.3
3
Rise Time
TrR
-
4
6
ms
4
Response time
Decay Time
TrD
-
12
24
ms
4
Rx 0.639
RED
Ry 0.342
Gx 0.297
GREEN
Gy 0.615
Bx 0.146
BLUE
By 0.068
Wx 0.313
Color
Coordinates
WHITE
Wy
Typ
-0.03
0.329
Typ
+0.03
Viewing Angle(CR>5)
x axis, right(=0°)
r
70
80
degree
5
x axis, right(=180°)
l
70
80
y axis, up(=90°)
u
70
80
y axis, down(=270°)
d
70
80
Viewing Angle(CR>10)
x axis, right(=0°)
r
60
70
degree
5
x axis, right(=180°)
l
60
70
y axis, up(=90°)
u
60
70
y axis, down(=270°)
d
60
70
Gray Scale
2.2
6
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