M185B1-L02 データシートの表示（PDF） - Unspecified
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M185B1-L02 Datasheet PDF : 25 Pages
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Doc No.:
Issued Date: Jun. 04, 2008
Model No.: M185B1-L02
Tentative
3.2 BACKLIGHT UNIT
Ta = 25 ± 2 ºC
Parameter
Symbol
Min.
Value
Typ.
Unit
Max.
Note
Lamp Input Voltage
VL
---
( 775 )
( 853 )
VRMS
IL = 7.5 mA
Lamp Current
IL
( 2.0 )
( 7.5 )
( 8.0 )
mARMS
(1)
Lamp Turn On Voltage VS
Operating Frequency FL
Lamp Life Time
LBL
Power Consumption
PL
---
---
40
(40000)
---
---
---
---
---
(10.85)
(1500(25℃))
(1710(0℃))
80
---
---
VRMS
VRMS
KHz
Hrs
W
(2)
(2)
(3)
(5), IL = 7.5mA
(4), IL = 7.5 mA
.tw Note (1) Lamp current is measured by current amplify & oscilloscope as shown below:
LCD
m Module
HV (+)
HV． (-)
．
．
．
HV (+)
．
．
．
．
Inverter
Current
Amplify Oscilloscope
o HV (-)
Current
Probe
.cMeasure equipment:
Current Amplify: Tektronix TCPA300
Current probe: Tektronix TCP312
Oscilloscope: TDS3054B
lcd 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 produce interference with horizontal synchronization frequency from the
s display, which might cause line flow on the display. In order to avoid interference, the lamp
.y frequency should be detached from the horizontal synchronization frequency and its harmonics as
far as possible.
Note (4) PL = IL × VL × 2 (for 2 lamps)
Note (5) The lifetime of lamp can be defined as the time in which it continues to operate under the condition
wTa = 25 ±2 oC and( IL = 7.5 mArms )until one of the following events occurs:
(a) When the brightness becomes ≦ 50% of its original value.
w(b) Effective lighting length decreases 80% under for initial. (Effective lighting length is a scope of
luminance 80% over for average luminance at several point in lamp center.)
wNote (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
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