M190A1-L01 View Datasheet(PDF) - Unspecified
Part Name
Description
Manufacturer
M190A1-L01 Datasheet PDF : 26 Pages
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Issued Date: Aug. 30, 2005
Model No.: M190A1-L01
Approval
3.2 BACKLIGHT UNIT
Ta = 25 ± 2 ºC
Parameter
Symbol
Lamp Input Voltage
VL
Lamp Current
IL
Lamp Turn On Voltage VS
Operating Frequency
FL
Lamp Life Time
LBL
Power Consumption
PL
Min.
697
2.0
---
---
40
40000
---
Value
Typ.
775
7.0
---
---
---
---
21.72
Max.
853
7.5
1500(25℃)
1710(0℃)
80
---
---
Unit
Note
VRMS
mARMS
VRMS
VRMS
KHz
Hrs
W
IL = 7.0 mA
(1)
(2)
(2)
(3)
(5)
(4), IL = 7.0 mA
Note (1) Lamp current is measured by utilizing high frequency current meters as shown below:
LCD
Module
HV (Pink)
1
LV (White)
2
A
HV (Blue)
1
LV (Black)
2
A
Inverter
A
Current Meter
YOKOGAWA 2016
Note (2) The voltage shown above should be applied to the lamp for more than 1 second after startup.
Otherwise the lamp may not be turned on.
Note (3) The lamp frequency may produce 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) PL = IL ×VL × 4 CCFLs
Note (5) The lifetime of lamp can be defined as the time in which it continues to operate under the condition
Ta = 25 ±2 oC and IL = 7.0 mA rms until one of the following events occurs:
(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
ignition length is defined as an area that has less than 70% brightness compared to the
brightness in 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 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.
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Version 2.1
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