Envision H2476WDHAL Service Manual page 16

4.3.4 Backlight Unit
Parameter
Light Bar Input Voltage
Light Bar Input Current
Power Consumption
LED Life Time
IFP LED Peak forward current
4.3.5 Optical Characteristics
Item
Color
Chromaticity
(CIE 1931)
Center Luminance of
White
(Center of Screen)
Contrast Ratio
Response Time
White Variation
Horizontal
Vertical
Viewing
Angle
Horizontal
Vertical
Symbol
V
I
P
I
Symbol
Rx
Red
Ry
Gx
Green
Gy
Bx
Blue
By
Wx
White
Wy
Lc
CR
T
R
T
F

W
-
-
-
-
Min
47.3
LED
58
LED
-
LED
L 30000
BL
-
LED
Conditions


y
=0°, =0°
x
R=G=B=255
Grayscale
 
y
=0°, =0°
x


y
=0°, =0°
x
CR 10
≧
BM-5A
CR ≧ 5
BM-5A
16
Value
Typ. Max.
54.4 63.2
60 63
13 15
- -
- 180
Min. Typ. Max.
0.64
0.338
0.311
0.619
Typ – Typ +
0.03
0.159
0.059
0.313
0.329
200 250
700 1000
- 1.3
- 3.7
75 80
150 170
140 160
160 178
150 170
Unit
V
DC
mA
DC
W
H
rs
mA
DC
Unit
0.03
2
- cd/m
- -
2.2 ms
5.5 ms
- -
-
-
Deg.
-
-