LG.Philips LCD LM181E06-A4M1 Specification
LM181E06
Liquid Crystal Display
Product Specification
1. General Description
The LM181E06-A4M1 is a Color Active Matrix Liquid Crystal Display with an integral Cold Cathode Fluorescent
Lamp(CCFL) backlight system. The matrix employs a-Si Thin Film Transistor as the active element.
It is a transmissive type display operating in the normally black mode. This TFT-LCD has a 18.1 inch diagonally
measured active display area with SXGA resolution(1024 vertical by 1280 horizontal pixel array).
Each pixel is divided into Red, Green and Blue sub-pixels or dots which are arranged in vertical stripes.
Gray scale or the brightness of the sub-pixel color is determined with a 8-bit gray scale signal for each dot,
thus, presenting a palette of more than 16,777,216 colors.
The LM181E06-A4M1 has been designed to apply the interface method that enables low power, high speed,low
EMI. FPD Link must be used as a LVDS(Low Voltage Differential Signaling) chip.
The LM181E06-A4M1 is intended to support applications where thin thickness, wide viewing angle, low power are
critical factors and graphic displays are important. In combination with the vertical arrangement of the sub-pixels,
the LM181E06-A4M1 characteristics provide an excellent flat panel display for office automation products such as
monitors.
G1
Gate Driver Circuit
LVDS
CN1
(30pin)
pair #1
LVDS
pair #2
Timing Controller
P
PLVDS 1 Chip
PP
TFT - LCD Panel
(1280 RGB 1024 pixels)
G1024
+12V
Vcc
Power Circuit
Block
RGB
CN2,3,4(2pin)
S1 S1280
Source Driver Circuit
Back light Assembly (6CCFL)
CN5,6,7(2pin)
General Features
Active screen size 18.1 inches (459.74mm) diagonal
Outline Dimension 389.0(H) x 317.2(V) x 27.0(D) mm(Typ.)
Pixel Pitch 0.2805 mm x 0.2805 mm
Pixel Format 1280 horizontal By 1024 vertical Pixels RGB stripe arrangement
Color depth 8-bits, 16,777,216 colors
Luminance, white 250 cd/m2(Typ. Center 1 point)
Power Consumption
Weight 3100g (Typ.)
Display operating mode Transmissive mode, normally black
Total 29.52 Watt(Typ.), (4.32Watt @Vcc, 25.2 Watt @250cd/ [Lamp=7mA])
Surface treatments Hard coating (3H), Anti-glare treatment of the front polarizer
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Liquid Crystal Display
Product Specification
2. Electrical Specifications
The LM181E06-A4M1 requires two power inputs. One is employed to power the LCD electronics and to
drive the TFT array and liquid crystal. The second input which powers the CCFL, is typically generated
by an inverter. The inverter is an external unit to the LCD.
Table 2. ELECTRICAL CHARACTERISTICS
LM181E06
Parameter Notes
Symbol Units
Min.
Typ. Max.
MODULE :
Values
Power Supply Input Voltage
Power Supply Input Current
Differential Impedance
Power Consumption
Rush Current
V
I
CC
Zm
P
I
RUSH
CC
11.4
90
C
12.0
0.36
100
4.32
--
12.6
0.45
110
5.4
4
V(DC)
A
Ohm
Watts
A
LAMP :
Operating Voltage
Operating Current
Established Starting Voltage
at 25
at 0
Operating Frequency
Discharge Stabilization Time
Power Consumption(6CCFL’s)
Life Time
V
V
F
P
I
T
BL
BL
BL
BL
550(8.0)
3.0
S
45
S
40,000
600(7.0)
7.0
55
25.2
725(3.0)
8.0
1,000
1,300
65
3
27.7
V
RMS
mA
RMS
V
RMS
V
RMS
KHz
Minutes
Watts
Hrs
Note : The design of the inverter must have specifications for the lamp in LCD Assembly.
The performance of the Lamp in LCM, for example life time or brightness, is extremely influenced by
the characteristics of the DC-AC inverter. So all the parameters of an inverter should be carefully
designed so as not to produce too much leakage current from high-voltage output of the inverter.
1
2
1
3
4
5
6
7
8
9
When you design or order the inverter, please make sure unwanted lighting caused by the mismatch
of the lamp and the inverter(no lighting, flicker, etc) never occurs. When you confirm it,
the LCD Assembly should be operated in the same condition as installed in you instrument.
Requirements for a system inverter design, which is intended to have a better display performance,
a better power efficiency and a more reliable lamp.
It shall help increase the lamp lifetime and reduce its leakage current.
a. The asymmetry rate of the inverter waveform should be 10% below;
b. The distortion rate of the waveform should be within 2 10%;
c. The ideal sine wave form shall be symmetric in positive and negative polarities.
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I p
Product Specification
* Asymmetry rate:
| I
–I –p| / I
p
rms
LM181E06
Liquid Crystal Display
* 100%
I -p
* Distortion rate
I
(or I –p) / I
p
1. The specified current and power consumption are under the V
CC
rms
=12.0V, 25C, fV=60Hz condition,
Typical supply current is measured at the condition of 8 X 6 chess pattern(white black)
2. This impedance value is for impedance matching between LVDS T
X
and
the mating connector of the LCD.
3. The duration of rush current is about 1ms.
4. The variance of the voltage is ± 10%.
5. The voltage above V
should be applied to the lamps for more than 1 second for start-up.
BS
Otherwise, the lamps may not be turned on.
6. The output of the inverter must have symmetrical (negative and positive) voltage waveform and
symmetrical current waveform.(Unsymmetrical ratio is less than 10%) Please do not use the inverter
which has unsymmetrical voltage and unsymmetrical current and spike wave.
Lamp frequency may produce interface with horizontal synchronous frequency and as a result this
may cause beat on the display. Therefore lamp frequency shall be as away possible from the
horizontal synchronous frequency and from its harmonics in order to prevent interference.
7. Let’s define the brightness of the lamp after being lighted for 5 minutes as 100%.
T
is the time required for the brightness of the center of the lamp to be not less than 95%.
S
The used lamp current is the lamp typical current.
8. The lamp power consumption shown above does not include loss of external inverter.
The used lamp current is the lamp typical current.
9. The life time is determined as the time at which brightness of the lamp is 50% compared to that of
initial value at the typical lamp current on condition of continuous operating at 25 ± 2C.
Typical life time shall be defined that remained rate maintains over 50% of total amount at the life test.
Do not attach a conductive tape to lamp connecting wire.
If the lamp wire attach to a conducting tape, TFT-LCD Module has a low luminance and the inverter has
abnormal action. Because leakage current is occurred between lamp wire and conducting tape.
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