Doc No.:
Issued Date:Dec.15,2006
Model No.: G150X1-L02
Approval
3.2 BACKLIGHT UNIT
Parameter
Lamp Input Voltage
Lamp Current
Lamp Turn On Voltage
Operating Frequency
Lamp Life Time
Power Consumption
Symbol
V
L
I
L
V
S
F
L
L
BL
P
L
Min.
522
2
--
--
40
50000
4.18
Value
Typ.
580
8
--
--
--
--
4.64
Max.
638
8.5
1400 ( 0℃)
1210 (25℃)
80
--
5.1
Unit
V
RMS
mA
RMS
V
RMS
V
RMS
KHz
Hrs
W
Ta = 25
±
2 ºC
Note
I
L
= 8.0 mA
(1)
(2)
(2)
(3)
(5)
(4), I
L
= 8.0 mA
Note (1) Lamp current is measured by utilizing a high frequency current meter as shown below:
HV (Pink/ Blue)
1
LV (White/ Black)
3
Inverter
A
Current Meter
LCD
Module
HV (Pink/ Blue)
1
LV (White/ Black)
3
Inverter
A
Current Meter
Note (2) The voltage that must be larger than Vs should be applied to the lamp for more than 1 second
after startup. Otherwise, the lamp may not be turned on normally.
Note (3) The lamp frequency may generate interference with horizontal synchronous frequency from the
display, and this may cause line flow on the display. In order to avoid interference, the lamp
frequency should be detached from the horizontal synchronous frequency and its harmonics as far
as possible.
Note (4) P
L
= I
L
X V
L
Note (5) The lifetime of lamp is defined as the time when it continues to operate under the conditions at Ta
= 25
±2
o
C and I
L
=8.0mA
RMS
until one of the following events occurs:
(a) When the brightness becomes
≤
50% of its original value.
(b) When the effective ignition length becomes
≤
80% of its original value. (Effective ignition length
is defined as an area that the brightness is less than 70% compared to the center point.)
Note (6) 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 generating 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.
10 / 27
Version 2.0
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