M220Z1-L02 Chi Mei, M220Z1-L02 Datasheet - Page 9

• Manufacturer Part Number: M220Z1-L02
• Description: LCD Module
• Manufacturer: Chi Mei

3.2 BACKLIGHT UNIT
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Note (1) Lamp current is measured by utilizing high-frequency current meters as shown below:
Note (2) The voltage shown above should be applied to the lamp for more than 1 second after startup.
Note (3) The lamp frequency may produce interference with horizontal synchronization frequency from the
Note (4) P
Note (5) The lifetime of lamp can be defined as the time in which it continues to operate under the
Note (6) The waveform of the voltage output of inverter must be area-symmetric and the design of the
Parameter
Lamp Input Voltage
Lamp Current
Lamp Turn On Voltage
Operating Frequency
Lamp Life Time
Power Consumption
Otherwise, the lamp may not be turned on normally.
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.
(a) When the brightness becomes or lower than 50% of its original value.
(b) When the effective ignition length becomes or lower than 80% of its original value. (Effective
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.
condition Ta = 25 ±2
L
Module
= I
ignition length is defined as an area that has less than 70% brightness compared to the
brightness in the center point.)
LCD
L
×V
L
X 4CCFLs
Symbol
L
V
V
P
F
I
BL
L
L
S
L
L
o
HV (Blue)
C and I
HV (Pink)
LV (Black)
LV (White)
L
50000
= 7 mArms until one of the following events occurs:
Min.
738
40
3
-
-
-
1
1
2
2
Ta = 25 ± 2 ºC
9 / 26
22.96
Value
Typ.
820
7.0
60
A
A
-
-
1560(25°C)
1800(0°C)
Inverter
Max.
902
80
8
-
-
mA
V
V
V
KHz
Unit
Hrs
Issued Date: Sep. 11, 2006
W
RMS
RMS
RMS
RMS
DOC No.: 14067720
Model No.: M220Z1-L02
(4), I
(5) I
Current Meter
YOKOGAWA 2016
I
L
= (7.0) mA
L
L
= (7.0) mA
Note
= (7.0) mA
A
(1)
(2)
(2)
(3)
Approval
Version 2.0