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LTM220MT05 Datasheet(PDF) 14 Page - Samsung semiconductor

Part No. LTM220MT05
Description  color active matrix liquid crystal display (LCD) that uses amorphous silicon TFT (Thin Film Transistor) as switching components
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Maker  SAMSUNG [Samsung semiconductor]
Homepage  http://www.samsung.com/Products/Semiconductor
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 14 page
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14/34
Page
LTM220MT05
MODEL
PRODUCT INFORMATION
PRODUCT INFORMATION
The back light unit is an edge - lighting type with 1 CCFL ( Cold Cathode
Fluorescent Lamp ) The characteristics of two dual lamps are shown in the following tables.
Ta=25
2 C
25
: 1,400
(5)
Vrms
0
: 1,700
-
-
Vs
Startup Voltage
1.5554
1.414
1.2726
Wdis
Distortion
rate
(4)
%
10
-
-
Wasy
Asymmetry
rate
Inverter
waveform
(3)
Hour
-
-
50,000
Hr
Operating Life Time
(2)
kHz
80
-
40
f
L
Lamp Frequency
Vrms
-
760
-
V
L
Lamp Voltage
(1)
mArms
8.0
7.5
4.0
I
L
Lamp Current
Note
Unit
Max.
Typ.
Min.
Symbol
Item
Note (1) Specified values are for a single lamp.
Lamp current is measured with current meter for high frequency as shown below.
Refer to the following block diagram of the back light unit for more information.
Fig. Measurement point of Lamp Current
3.2 Back Light Unit
I
1
I
2
INVERTER
(SI1700)
HOT
COLD
A
LCD Module
HOT
COLD
A




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