CM2225 LITEMAX, CM2225 Datasheet - Page 10

• Manufacturer Part Number: CM2225
• Description: WXGA LCD Display
• Manufacturer: LITEMAX

Backlight Unit
Parameter
Lamp Input
Voltage
Lamp Current
Lamp Turn On
Voltage
Operating
Frequency
Lamp Life Time
Power
Consumption
Note (1) Lamp current is measured by utilizing high-frequency current meters as shown
Note (2) The voltage that must be larger than Vs should be applied to the lamp for more
Note (3) The lamp frequency may produce interference with horizontal synchronization
Note (4)
Note (5)
Note (6)
(a)
(b)
below:
than 1 second after startup. Otherwise, the lamp may not be turned on normally.
frequency from the display, which might cause line flow on the display. In order
to avoid interference, the lamp frequency should be detached from the
horizontal synchronization frequency and its harmonics as far as possible.
P
The lifetime of lamp can be defined as the time in which it continues to operate
under the condition Ta = 25 ±2
occurs:
When the brightness becomes or lower than 50% of its original value.
When the effective ignition length becomes or lower than 80% of its original value.
(Effective ignition length is defined as an area that has less than 70% brightness
compared to the brightness in the center point.)
The waveform of the voltage output of inverter must be area-symmetric and the
design of the inverter must have specifications for the modularized lamp. The
performance of the Backlight, such as lifetime or brightness, is greatly influenced by
the characteristics of the DC-AC inverter for the lamp. All the parameters of an
inverter should be carefully designed to avoid producing too much current leakage
from high voltage output of the inverter. When designing or ordering the inverter
please make sure that a poor lighting caused by the mismatch of the Backlight and
the inverter (miss-lighting, flicker, etc.) never occurs. If the above situation is
confirmed, the module should be operated in the same manners when it is installed
in your instrument.
L
= I
L
×V
L
Symbol
V
I
V
F
L
P
L
X 4CCFLs
BL
L
L
S
L
. Min.
-
-
738
3
40
50000
-
o
C and I
Page 10
Typ
820
7.0
-
-
60
22.96
www.DataSheet.co.kr
L
= 7 mArms until one of the following events
Max.
902
8
1560(25°C)
1800(0°C)
80
-
-
Unit
V
mA
V
V
KHz
Hrs
W
RMS
RMS
RMS
RMS
Note
(3)
(5) I
mA
(4), I
mA
I
(1)
(2)
(2)
L
= (7.0) mA
L
L
= (7.0)
= (7.0)
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