Akai LCT42Z7TAP, Service Manual

Page: 93 / 130

Product Specification
LC420WU1
Liquid Crystal Display
4. Optical Specification
Optical characteristics are determined after the unit has been ‘ON’ and stable for approximately 2 Hrs in a dark
environment at 25
±
2
°
C. The specified optical values are measured at an approximate 50cm distance from the
LCD surface on condition that viewing angle of
Φ
and
θ
equal to 0
°
.
FIG. 1 shows additional information concerning the measurement equipment and method.
LCD Module
Optical Stage(x,y)
Pritchard 880
or equivalent
50cm
FIG. 1 Optical Characteristic Measurement Equipment and Method
Table 13. OPTICAL CHARACTERISTICS
Ta= 25
±
2
°
C
, V
LCD
=12.0V, f
V
=60Hz, Dclk=148.5MHz VBR=3.3V
- 1600 1100 CR with DCR
(
φ
=315
°
)
(
φ
=225
°
)
(
φ
=135
°
)
(
φ
=45
°
)
Diagonal Front
5 degree
- 89 85
θ
r x axis, right(
φ
=0
°
)
- 89 85
θ
l x axis, left (
φ
=180
°
)
- 89 85
θ
u y axis, up (
φ
=90
°
)
- 89 85
θ
d y axis, down (
φ
=270
°
)
800 600 CR
6
Gray Scale
5P
Viewing Angle (CR>10)
WHITE
BLUE
GREEN
RED
0.611 Gy
0.279
Gx
0.062
By
0.146
Bx
0.278 Wy
0.272 Wx
ms
0.340 Ry
Typ
+0.03
0.638
Typ
-0.03
Rx
Color Coordinates
[CIE1931]
4 16 8 Tr
R ,
Tr
D
Response Time
(Gray-to-Gray)
3 1.3
δ
WHITE
Luminance Variation
2 cd/m 2
550 440
L
WH
Surface Luminance, white
1
Note Unit
Contrast Ratio
Max Typ Min
Value
Symbol Parameter
91／128