LG LM-190WX1-TLD2 Service manual

SPECIFICATION

(◆ ) Preliminary Specification
( ) Final Specification

LM190WX1

Liquid Crystal Display

Product Specification

FOR

APPROVAL

19.0” WXGA+ TFT LCDTitle

BUYER

MODEL

www.jxlcd.com

www.jxlcd.com

SIGNATURE DATE

/

/

/

KTC

SUPPLIER LG.Philips LCD CO., Ltd.

*MODEL LM190WX1

SUFFIX TLD2

*When you obtain standard approval,
please use the above model name without suffix

APPROVED BY

K.G. Park / G.Manager

REVIEWED BY

S.J. So / Manager [C]

S.Y. An / Manager [M]

H.S. Lee / Manager [P]

PREPARED BY

J.H. Song / Engineer

DATE

Please return 1 copy for your confirmation
With your signature and comments.

Ver. 0.0 Oct. 30, 2007

Product Engineering Dept.

LG. Philips LCD Co., Ltd

1 / 29

Product Specification

Contents

LM190WX1

Liquid Crystal Display

No

COVER

CONTENTS

RECORD OF REVISIONS

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3

1)

2)

3)

4)

5)

6)

7)

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1)

2)

8

1)

2)

GENERAL DESCRIPTION

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL SPECIFICATIONS

ELECTRICAL CHARACTERISTICS

INTERFACE CONNECTIONS

SIGNAL TIMING SPECIFICATIONS

SIGNAL TIMING WAVEFORMS

COLOR INPUT DATA REFERNECE

POWER SEQUENCE

POWER DIP CONDITION

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OPTICAL SFECIFICATIONS

MECHANICAL CHARACTERISTICS

RELIABILITY

INTERNATIONAL STANDARDS

SAFETY

EMC

PACKING

DESIGNATION OF LOT MARK

PACKING FORM

PRECAUTIONS9

MOUNTING PRECAUTIONS1)

OPERATING PRECAUTIONS2)

ELECTROSTATIC DISCHARGE CONTROL3)

PRECAUTIONS FOR STRONG LIGHT EXPOSURE4)

STROAGE5)

HANDLING PRECAUTIONS FOR PROTECTION FILM6)

ITEM

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Product Specification

RECORD OF REVISIONSRECORD OF REVISIONS

Revision No DescriptionDate Page

LM190WX1

Liquid Crystal Display

Ver 0.0

Oct. 30, 2007

www.jxlcd.com

www.jxlcd.com

Preliminary Specifications

Ver. 0.0 Oct. 30, 2007

3 / 29

LM190WX1

Liquid Crystal Display

Product Specification

1. General Description

LM190WX1-TLD2 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 white mode. It has a 19.0 inch diagonally measured active
display area with WXGA+ resolution (1440 vertical by 900 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 sub­pixel color is determined with a 8-bit gray scale signal for each dot, thus, presenting a palette of more than
16,7M colors with Advanced-FRC(Frame Rate Control). It has been designed to apply the interface method that
enables low power, high speed, low EMI. FPD Link or compatible must be used as a LVDS(Low Voltage
Differential Signaling) chip. It 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 LM190WX1-TLD2 characteristics provide an excellent flat panel display for office automation
products such as monitors.

FIG. 1 Block diagram

LVDS

pair #1

CN1

(30pin)

LVDS

pair #2

+5V

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VLCD

General Features

Active screen size 19.0 inches (481.4mm) diagonal

Outline Dimension 427.2(H) x 277.4(V) x 15.3(D) mm(Typ.)

Pixel Pitch 0.095*RGB(H)mm x 0.285(V)mm

Pixel Format 1440 horizontal By 900 vertical Pixels. RGB stripe arrangement

Timing Controller

＆LVDS 1 Chip

Power Circuit

Block

RGB

Gate Driver Circuit

CN2, 3 (2pin)
CN4, 5 (2pin)

Source Driver Circuit

S1 S1440

G1

TFT - LCD Panel

(1440 × RGB × 900 pixels)

G900

Back light Assembly (4CCFL)

Interface LVDS 2Port

Color depth 16.7M colors

Luminance, white 300 cd/m2 ( Center 1Point, Typ.)

Viewing Angle (CR>10) R/L 160(Typ.), U/D 160(Typ.)

Power Consumption

Weight 1800g(Typ.)

Display operating mode Transmissive mode, normally White

Surface treatments Hard coating (2H), Glare treatment of the front polarizer

Ver. 0.0 Oct. 30, 2007

Total 22.5 Watt(Typ.), (3 W@V

, 19.5 W@[Lamp=6.5mA])

LCD

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Product Specification

2. Absolute Maximum Ratings

The following are maximum values which, if exceeded,
may cause faulty operation or damage to the unit.

Table 1. Absolute Maximum Ratings

LM190WX1

Liquid Crystal Display

Parameter Notes

Power Supply Input Voltage

Operating Temperature

Storage Temperature

Operating Ambient Humidity

Storage Humidity

Note : 1. Temperature and relative humidity range are shown in the figure below.
Wet bulb temperature should be 39 °C Max, and no condensation of water.

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FIG. 2 Temperature and relative humidity

Symbol

LCD

OP

ST

OP

ST

Values

MaxMin

90%

60

60%

Units

°C500T

°C60-20T

%RH9010H

%RH9010H

At 25℃Vdc+5.5-0.3V

1

Wet Bulb

50

Temperature [C]

40

30

20

10

0

10 20 30 40 50 60 70 800-20

Dry Bulb Temperature [C]

Ver. 0.0 Oct. 30, 2007

40%

10%

Hu
mi
dit
y
[(
%
)R
H]

Storage

Operation

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LM190WX1

Liquid Crystal Display

Product Specification

3. Electrical Specifications

3-1. Electrical Characteristics

It requires two power inputs. One is employed to power the LCD electronics and to drive the
TFT array and liquid crystal. The second input power for the CCFL/Backlight, is typically
generated by an inverter. The inverter is an external unit to the LCDs.

Table 2. Electrical Characteristics

Parameter Symbol

MODULE :

Power Supply Input Voltage

Power Supply Input Current

Power Consumption
Inrush current

Note :

1. The specified current and power consumption are

under the VLCD=5.0V, 25  2°C,f

whereas mosaic pattern(8 x 6) is displayed and fV is the frame frequency.

2. The current is specified at the maximum current pattern.

3. The duration of rush current is about 2ms and rising time of power Input is 500us  20%.

FIG.3 Mosaic pattern for power consumption measurement

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LCD

I

LCD

LCD

RUSH

=60Hz condition

V

White : 255Gray
Black : 0Gray

-

-

-P

Values

MaxTypMin

Vdc5.55.04.5V

690600
828720

3.453

NotesUnit

1mA
2mA
1Watt
3A3--I

Mosaic Pattern(8 x 6)

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Product Specification

Table 3. ELECTRICAL CHARACTERISTICS

LM190WX1

Liquid Crystal Display

Parameter

LAMP :
Operating Voltage
Operating Current

at 25 °C

at 0 °C

Operating Frequency

Discharge Stabilization Time

Power Consumption

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.
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.

※ Do not attach a conducting 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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Symb

ol

V

BL

BL

BL

S

BL

Values

853(3.0mA)750(6.5mA)735(7.0mA)

MaxTypMin

7.06.53.0I

1250

1550

NotesUnit

RMS

RMS

V

RMS

V

RMS

1, 2V

1mA

1, 3Vs Established Starting Voltage

4kHz80-40f

1, 5Min3--T

6Watt21.4719.52P

1, 7Hrs-50,000 Life Time

1. Specified values are for a single lamp.

2. Operating voltage is measured at 25  2°C. The variance of the voltage is  10%.

3. The voltage above VS should be applied to the lamps for more than 1 second for start-up.
(Inverter open voltage must be more than lamp starting voltage.)

Otherwise, the lamps may not be turned on. The used lamp current is the lamp typical current.

4. 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.

5. Let’s define the brightness of the lamp after being lighted for 5 minutes as 100%.

TS is the time required for the brightness of the center of the lamp to be not less than

95%.

6. The lamp power consumption shown above does not include loss of external inverter.
The used lamp current is the lamp typical current. (PBL = VBL x IBL x N

7. The life 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  2°C.

Ver. 0.0 Oct. 30, 2007

Lamp

)

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Liquid Crystal Display

Product Specification

8. 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. Requirements for a system inverter design, which is intended to
have a better display performance, a better power efficiency and a more reliable lamp,
are following.It shall help increase the lamp lifetime and reduce leakage current.

a. The asymmetry rate of the inverter waveform should be less than 10%.
b. The distortion rate of the waveform should be within √2 ±10%.
* Inverter output waveform had better be more similar to ideal sine wave.

* Asymmetry rate:

I p

| I p – I –p | / I

x 100%

rms

LM190WX1

I -p

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9. The inverter which is combined with this LCM, is highly recommended to connect

coupling(ballast) condenser at the high voltage output side. When you use the inverter
which has not coupling(ballast) condenser, it may cause abnormal lamp lighting because
of biased mercury as time goes.

10.In case of edgy type back light with over 4 parallel lamps, input current and voltage
wave form should be synchronized

* Distortion rate

I p (or I –p) / I

rms

Ver. 0.0 Oct. 30, 2007

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Product Specification

3-2. Interface Connections

LCD Connector(CN1) : AL230F-ALG1D-P (P-Two) and IS100-L30R-C23(UJU)

Mating Connector : FI-X30H and FI-X30HL (Manufactured by JAE) or Equivalent

Table 4. MODULE CONNECTOR(CN1) PIN CONFIGURATION

Pin No Symbol Description

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30

RXO0­ RXO0+
RXO1­ RXO1+
RXO2­ RXO2+
GND
RXOC­ RXOC+
RXO3-

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RXO3+

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RXE0­ RXE0+
GND
RXE1­ RXE1+
GND
RXE2­ RXE2+
RXEC­ RXEC+
RXE3­ RXE3+
GND
NC
NC
PWM_out
VLCD
VLCD
VLCD

Minus signal of 1st channel 0 (LVDS)
Plus signal of 1st channel 0 (LVDS)
Minus signal of 1'st channel 1 (LVDS)
Plus signal of 1'st channel 1 (LVDS)
Minus signal of 1'st channel 2 (LVDS)
Plus signal of 1'st channel 2 (LVDS)
Ground
Minus signal of 1'st clock channel (LVDS)
Plus signal of 1'st clock channel (LVDS)
Minus signal of 1'st channel 3 (LVDS)
Plus signal of 1'st channel 3 (LVDS)
Minus signal of 2'nd channel 0 (LVDS)
Plus signal of 2'nd channel 0 (LVDS)
Ground
Minus signal of 2'nd channel 1 (LVDS)
Plus signal of 2'nd channel 1 (LVDS)
Ground
Minus signal of 2'nd channel 2 (LVDS)
Plus signal of 2'nd channel 2 (LVDS)
Minus signal of 2'nd clock channel (LVDS)
Plus signal of 2'nd clock channel (LVDS)
Minus signal of 2'nd channel 3 (LVDS)
Plus signal of 2'nd channel 3 (LVDS)
Ground
No Connection
No Connection
Reference signal for inverter control
Power Supply +5.0V
Power Supply +5.0V
Power Supply +5.0V

LM190WX1

Liquid Crystal Display

Ver. 0.0 Oct. 30, 2007

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