LG LM-190E08-TLG2 Service manual

SPECIFICATION

( ) Preliminary Specification (◆) Final Specification

LM190E08

Liquid Crystal Display

Product Specification

FOR

APPROVAL

19.0” SXGA TFT LCDTitle

BUYER

MODEL

www.jxlcd.com

SIGNATURE DATE

General

SUPPLIER LG Display Co., Ltd.

*MODEL LM190E08

SUFFIX TLG2

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

APPROVED BY

G.T. KIM / G.Manager

REVIEWED BY

B.C. Song / Manager [C]

J. H. Lee / Manager [M]

D.Y. Seok / Manager [P]

PREPARED BY

J.W. Hyun / Engineer

DATE

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

Ver. 1.0 July, 01, 2008

Product Engineering Dept.

LG Display Co., Ltd

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Product Specification

Contents

LM190E08

Liquid Crystal Display

COVER

CONTENTS

RECORD OF REVISIONS

GENERAL DESCRIPTION

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL SPECIFICATIONS

ELECTRICAL CHARACTERISTICS

INTERFACE CONNECTIONS

LVDS characteristics

SIGNAL TIMING SPECIFICATIONS

SIGNAL TIMING WAVEFORMS

COLOR INPUT DATA REFERNECE

POWER SEQUENCE

POWER DIP CONDITION

OPTICAL SFECIFICATIONS

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MECHANICAL CHARACTERISTICS

ITEM

Page

204

255

RELIABILITY

INTERNATIONAL STANDARDS

SAFETY

EMC

PACKING

DESIGNATION OF LOT MARK

PACKING FORM

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286

297

308

31PRECAUTIONS9

31MOUNTING PRECAUTIONS1)

31OPERATING PRECAUTIONS2)

32ELECTROSTATIC DISCHARGE CONTROL3)

32PRECAUTIONS FOR STRONG LIGHT EXPOSURE4)

32STROAGE5)

32HANDLING PRECAUTIONS FOR PROTECTION FILM6)

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Product Specification

Record of revisions

Revision No DescriptionDate Page

LM190E08

Liquid Crystal Display

Ver 1.0

July,01,2008

www.jxlcd.com

Final Specifications.

Ver. 1.0 July, 01, 2008

3 / 32

LM190E08

Liquid Crystal Display

Product Specification

1. General description

LM190E08-TLG2 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 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 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 LM190E08-TLG2 characteristics provide an excellent flat panel display for office automation products such as monitors.

FIG. 1 Block diagram

LVDS

pair #1

LVDS

pair #2

CN1

+5V

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VLCD

Power circuit

block

Timing

controller

RGB

CN2, 3 (2pin)

CN4, 5 (2pin)

Source driver circuit

TFT-LCD Panel

(1280×RGB×1024 pixels)

G1024

Backlight assembly (4 CCFLs)

S1280

General features

Active screen size 19.0 inches (481.9mm) diagonal

Outline Dimension 396.0(H) x 324.0(V) x 15.5(D) mm(Typ.)

Pixel Pitch 0.098*RGB(H)mm x 0.294(V)mm

Pixel Format 1280 horizontal By 1024 vertical Pixels. RGB stripe arrangement

Interface LVDS 2Port

Color depth 16.7M colors

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

Viewing Angle (CR>10) R/L 170(Typ.), U/D 160(Typ.)

Power Consumption

Weight 1,950g (Typ.)

Display operating mode Transmissive mode, normally White

Surface treatments Hard coating (3H), Anti-glare treatment of the front polarizer

Ver. 1.0 July, 01, 2008

Total 25.1W(Typ.), (4.5W@V

, 20.6W@IBL =7.5mA)

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

LM190E08

Liquid Crystal Display

Values

90%

MaxMin

60%

40%

10%

Hu mi dit y [( % )R H]

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.

FIG. 2 Temperature and relative humidity

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Wet Bulb Temperature [℃]

Symbol

LCD

Units

°C500T

°C60-20T

%RH9010H

Storage

Operation

At 25℃Vdc+6.0-0.3V

10 20 30 40 50 60 70 800-20

Dry Bulb Temperature [℃]

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LM190E08

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

Permissive Power Input Ripple

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. Permissive power ripple should be measured under VCC=5.0V, 25°C, fV (frame frequency)=75Hz condition and At that time, we recommend the bandwidth configuration of oscilloscope is to be under 20MHz.

4. The duration of rush current is about 5ms and rising time of power Input is 500us  20%.

FIG.3 pattern for Electrical characteristics

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LCD

LCD-MOSAIC

LCD-BLACK

LCD

RUSH

=60Hz condition

Values

MaxTypMin

NotesUnit

Vdc5.55.04.5V

3V0.2--V

1mA1,050900-I

2mA1,2601,090-

1Watt5.184.5-P

3A3.0--I

power consumption measurement

White : 255Gray Black : 0Gray

Mosaic Pattern(8 x 6)

Ver. 1.0 July, 01, 2008

power input ripple

Full Black Pattern

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Product Specification

Table 3. Electrical characteristics

LM190E08

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

675

(8.0mA)

Values

685

(7.5mA)

MaxTypMin

790

(3.0mA)

8.07.53.0I

1,100

1,400

NotesUnit

RMS

1, 2V

1mA

1, 3Vs Established Starting Voltage

4kHz70-40f

1, 5Min3--T

6Watt22.6120.55P

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. 1.0 July, 01, 2008

Lamp

)

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Liquid Crystal Display

Product Specification

Note :

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

LM190E08

I -p

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

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* Distortion rate

I p (or I –p) / I

rms

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Product Specification

3-2. Interface connections

LCD connector(CN1) : IS100-L30O-C23 (UJU) , 187034-30091 (P-TWO)

Table 4. Module connector(CN1) pin configuration

LM190E08

Liquid Crystal Display

Pin No

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

Symbol Description

RXO0 RXO0+ RXO1 RXO1+ RXO2 RXO2+ GND RXOC RXOC+ RXO3 RXO3+ RXE0-

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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 1st channel 1 (LVDS) Plus signal of 1st channel 1 (LVDS) Minus signal of 1st channel 2 (LVDS) Plus signal of 1st channel 2 (LVDS) Ground (AGP) Minus signal of 1st clock channel (LVDS) Plus signal of 1st clock channel (LVDS) Minus signal of 1st channel 3 (LVDS) Plus signal of 1st channel 3 (LVDS) Minus signal of 2nd channel 0 (LVDS) Plus signal of 2nd channel 0 (LVDS) Ground Minus signal of 2nd channel 1 (LVDS) Plus signal of 2nd channel 1 (LVDS) Ground Minus signal of 2nd channel 2 (LVDS) Plus signal of 2nd channel 2 (LVDS) Minus signal of 2nd clock channel (LVDS) Plus signal of 2nd clock channel (LVDS) Minus signal of 2nd channel 3 (LVDS) Plus signal of 2nd channel 3 (LVDS) Ground No Connection (For LCD internal use only.) No Connection (For LCD internal use only.) Reference signal for inverter control Power Supply (5.0V) Power Supply (5.0V) Power Supply (5.0V)

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FIG. 4 Connector diagram

#1 #30

1’st signal pairs

LM190E08

Liquid Crystal Display

Product Specification

IS100-L30O-C23(UJU)

2’nd signal pairs

Power(+5V)

PWM_OUT

Rear view of LCM

Note:

1. NC: No Connection.

2. All GND(ground) pins should be connected together and to Vss which

should also

be connected to the LCD’s metal frame.

3. All V

4. Input Level of LVDS signal is based on the IEA 664 Standard.

5. PWM_OUT is a reference signal for inverter control.

This PWM signal is synchronized with vertical frequency.

Its frequency is 3 times of vertical frequency, and its duty ratio is 50%.

If the system don’t use this pin, do not connect.

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(power input) pins should be connected together.

LCD

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LG LM-190E08-TLG2 Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual