LG Display LC420WXE-SBA1 Specification

LC420WXE

Product Specification

SPECIFICATION

FOR

APPROVAL

)

(

(

Preliminary Specification

)

Final Specification

●

42.0” WXGA TFT LCDTitle

MODEL

APPROVED BY

/

/

/

GeneralBUYER

SIGNATURE

DATE

LG.Display Co., Ltd.SUPPLIER

LC420WXE*MODEL

SBA1 (RoHS Verified)SUFFIX

*When you obtain standard approval,

please use the above model name without suffix

APPROVED BY

J. T Kim / Team Leader

REVIEWED BY

Y. H Choi / Project Leader

PREPARED BY

Y. D Lee / Engineer

SIGNATURE

DATE

Please return 1 copy for your confirmation with

your signature and comments.

Ver. 1.0

TV Products Development Dept.

LG. Display LCD Co., Ltd

1 / 37

Product Specification

CONTENTS

LC420WXE

PageItemNumber

COVER

CONTENTS

RECORD OF REVISIONS

GENERAL DESCRIPTION1

ABSOLUTE MAXIMUM RATINGS2

ELECTRICAL SPECIFICATIONS3

ELECTRICAL CHARACTERISTICS3-1

INTERFACE CONNECTIONS3-2

SIGNAL TIMING SPECIFICATIONS3-3

SIGNAL TIMING WAVEFORMS3-4

COLOR INPUT DATA REFERENCE3-5

POWER SEQUENCE3-6

OPTICAL SPECIFICATIONS4

MECHANICAL CHARACTERISTICS5

RELIABILITY6

INTERNATIONAL STANDARDS7

1

2

3

4

5

6

6

10

12

13

14

15

16

20

23

24

Ver. 1.0

SAFETY7-1

EMC7-2

PACKING8

DESIGNATION OF LOT MARK8-1

PACKING FORM8-2

PRECAUTIONS9

MOUNTING PRECAUTIONS9-1

OPERATING PRECAUTIONS9-2

ELECTROSTATIC DISCHARGE CONTROL9-3

PRECAUTIONS FOR STRONG LIGHT EXPOSURE9-4

STORAGE9-5

HANDLING PRECAUTIONS FOR PROTECTION FILM9-6

24

24

25

25

25

26

26

26

27

27

27

27

2 / 37

Product Specification

RECORD OF REVISIONS

CAS Version 0.0 Release -Jun, 25, 20080.0

Update Haze % for Front Polarizer4Sep, 10, 20080.1

Update Optical Characteristics ( Color Coordinates , G-to-G )16,17

Update Mechanical Drawing for Rear view ( Guide Lamp added)22

Update Appendix VI for LVDS Characteristics-Sep, 20, 20080.2

Update Mechanical Drawings for front and rear view21-22Jan, 07, 20091.0

Final Specification

LC420WXE

DescriptionPageRevision DateRevision No.

Ver. 1.0

3 / 37

LC420WXE

Product Specification

1. General Description

The LC420WXE is a Color Active Matrix Liquid Crystal Display with an integral External Electrode Fluorescent
Lamp(EEFL) 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. It has a 42.0 inch diagonally measured
ac t i ve d is p la y ar e a w i th W XG A r es o lu t i o n (7 68 ve rt ica l b y 1 366 h or i zo n ta l p ix el a r ra y) .
Each pixel is divided into Red, Green and Blue sub-pixels or dots which are arranged in vertical stripes.
Gray scale or the luminance of the sub-pixel color is determined with a 8-bit gray scale signal for each dot,
thus presenting a palette of more than 16.7M(true) colors.
It has been designed to apply the 8-bit 1-port LVDS interface.
It is intended to support LCD TV, PCTV where high brightness, super wide viewing angle, high color gamut,
high color depth and fast response time are important.

+12.0V

5pair

LVDS
1Port

LVDS
Select

OPC_Enable

OPC out

ExtVBR-B

High Input

High Input

#9

#10

#27

#28

CN5

(30pin)

General Features

EEPROM

(LUT)

SCL

SDRAM

LVDS Rx (Receiver)

DCR & ODC Controller

Timing Controller

Power Circuit

Block

CN2, 3pin, 18 Lamps/@135 mA

CN2, 3pin, 18 Lamps/@135 mA

42.02 inches(1067.308mm) diagonalActive Screen Size

983 mm(H) x 576 mm(V) x 46.0 mm(D) including T-CON Cover Shield (Typ.)Outline Dimension

0.227mm x 0.681mm x RGBPixel Pitch

1366 horiz. by 768 vert. Pixels RGB stripe arrangementPixel Format

8-bit, 16.7 M colorsColor Depth

500 cd/m2 (Center 1-point) (Typ.)Luminance, White

Viewing Angle Free ( R/L 178 (Typ.), U/D 178 (Typ))Viewing Angle (CR>10)

Total 158.3W (Typ.) (Logic=4.3W, Backlight=154W @ with Inverter )Power Consumption

10.0 (Typ.) Weight

Transmissive mode, Normally blackDisplay Operating Mode

SDA

Mini-LVDS(RGB)

G1

Gate Driver Circuit

G768

Source Driver Circuit

S1 S1366

TFT - LCD Panel

(1366 × RGB × 768 pixels)

Back light Assembly

Ver. 1.0

Hard coating(663H), Anti-glare treatment of the front polarizer (Haze 10%)Surface Treatment

4 / 37

LC420WXE

Product Specification

2. Absolute Maximum Ratings

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

Table 1. ABSOLUTE MAXIMUM RATINGS

Value

Parameter Remark

Symbol

Unit

MaxMin

Power Input
Voltage

B/L Input voltage

Operating Voltage
(one side)

V [RMS]1100700VOP

°C+500TOPOperating Temperature

°C+60-20TSTStorage Temperature

%RH9010HOPOperating Ambient Humidity

%RH9010HSTStorage 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.

2. Gravity mura can be guaranteed under 40 °C condition.

90%

60

60%

at 25 ± 2 °CV [DC]+14.0+8.0VLCDLCD circuit

at 25 ± 2 °C

Burst Dimming Duty 100%

Page 9 #9 pin+3.6V-0.3VVIOption Input Voltage ( LVDS Select )

Note 1

Ver. 1.0

Wet Bulb
Temperature [°C]

20

10

0

10 20 30 40 50 60 70 800-20
Dry Bulb Temperature [°C]

30

40

50

40%

10%

Storage

Operation

Humidity [(%)RH]

5 / 37

LC420WXE

Product Specification

3. Electrical Specifications

3-1. Electrical Characteristics

It requires two power inputs. One is employed to power for the LCD circuit. The other input power for the
EEFL Backlight.

Table 2. ELECTRICAL CHARACTERISTICS

Parameter Symbol

Value

Circuit :

ILCDPower Input Current

Note : 1. The specified current and power consumption are under the V

condition whereas mosaic pattern(8 x 6) is displayed and fVis 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 0.5ms (min.).

White : 255Gray
Black : 0Gray

MaxTypMin

V [DC]12.612.011.4VLCDPower Input Voltage

=12.0V, 25 ± 2°C, fV=60Hz

LCD

NoteUnit

1mA465358-

2mA598460-

1Watt5.584.30PLCDPower Consumption

3A3.0--IRUSHRush current

Ver. 1.0

Mosaic Pattern(8 x 6)

6 / 37

Product Specification

Table 3. ELECTRICAL CHARACTERISTICS of Back Light Assembly & Lamp (Continue)

LC420WXE

Parameter Symbol

Values

NotesUnit

MaxTypMin

Backlight Assembly :

Operating Voltage

(one side,fBL=63KHz,IBL= 135mArms)

Operating Current (one side)

Established Starting
Voltage (one side)

0℃
25℃

Parameter Symbol

VS

Values

1100950800VBL

144135126IBL

1200-

1000-

RMS

RMS

RMS

1, 2V

1mA

1, 3V

4kHz646260fBLOperating Frequency

3sec1.5--S TIMEStriking Time

6Watt154PBLPower Consumption

9%10020PWM dutyBurst Dimming Duty

9Hz182-981/TBurst Dimming Frequency

NotesUnit

MaxTypMin

Lamp : (APPENDIX-VI)

1, 2V

1mA

1, 5Min3--TSDischarge Stabilization Time

1, 3V

7Hrs50,000Life Time

Established Starting
Voltage (one side)

10501000850VLAMPLamp Voltage (one side)

87.53ILAMPLamp Current (one side)

VS0℃

VS25℃

1200

1000

RMS

RMS

KHz806540f LAMPLamp Frequency

°C130TLAMPLamp Temperature

RMS

Note : The design of the inverter must have specifications for the lamp in LCD Assembly.

The electrical characteristics of inverter are based on High-High Driving type.

The performance of the lamps 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) has never been occurred. When you confirm it,

the LCD– Assembly should be operated in the same condition as installed in your instrument.

※ Do not attach a conductive tape to lamp connecting wire.

If you attach conductive tape to the lamp wire, not only luminance level can be lower than typical one
but also inverter operate abnormally on account of leakage current which is generated between lamp wire
and conductive tape.

1. Specified values are defined for a Backlight Assembly.( IBL : 18 lamp, 7.5mA/Lamp)

2. Operating voltage is measured at 25 ± 2°C(after 2hr.aging). The variance range for operating voltage is ± 10%.

3. The established starting voltage [ VS ] should be applied to the lamps for more than Striking time (S TIME)
for start-up. Inverter open voltage must be more than established starting voltage. Otherwise, the lamps may
not be turned on. The used lamp current is typical value.

Ver. 1.0

7 / 37

LC420WXE

Product Specification

Vpk-pk

S TIME

Vs = (Vpk-pk) / [ 2*root(2)]

4. Lamp frequency may produce interference with horizontal synchronous frequency.As a result this may
cause beat on the display. Therefore, lamp frequency shall be away as much as possible from the horizontal

synchronous frequency and its harmonics range in order to prevent interference.

There is no reliability problem of lamp, if use out of range of operation frequency (40 kHz~80 kHz) on CAS

5. The brightness of the lamp after lighted for 5minutes is defined as 100%.

TSis the time required for the brightness of the center of the lamp to be not less than 95% at typical current.

The screen of LCD module may be partially dark by the time the brightness of lamp is stable after turn on.

6. Maximum level of power consumption is measured at initial turn on.
Typical level of power consumption is measured after 2hrs aging at 25 ± 2°C.

7. 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 ± 2°C, based on duty 100%.

8.The output of the inverter must have symmetrical(negative and positive) voltage and current waveform

(Unsymmetrical ratio is less than 10%). Please do not use the inverter which has not only unsymmetrical

voltage and current but also spike wave.
Requirements for a system inverter design, which is intended to achieve better display performance,

power efficiency and more reliable lamp characteristics.
It can 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.

Ver. 1.0

I p

I -p

* Asymmetry rate:

| I p– I –p| / Iopx 100%

* Distortion rate

I p(or I –p) / I

op

8 / 37

Product Specification

9. The reference method of burst dimming duty ratio.
It is recommended to use synchronous V-sync frequency to prevent waterfall
(Vsync x 2 =Burst Frequency)
Though PWM frequency is over 182Hz (max252Hz), function of backlight is not affected.

T

A

PWM

Output of Inverter to Lamp

90%

LC420WXE

+3.3V TTL

I-out

PWM duty={ A/T } * 100

Point A : rising time 90% of Iout point .
Point B : falling starting point .
I out duty = { a/T } * 100
PWM Frequency = 1/T

※ We recommend not to be much different between PWM duty and Iout duty .
※ Dimming current output rising and falling time may produce humming and inverter trans’ sound noise.
※ Burst dimming duty should be 100% for more than 1second after turn on.
※ Equipment

Oscilloscope :TDS3054B(Tektronix)
Current Probe : P6022 AC (Tektronix)
High Voltage Probe: P5100(Tektronix)

11. The operating current must be measured as near as backlight assembly input.

Point A

a

Point B

12. The operating current unbalance between left and right must be under 10% of Typical current

│Left(Master) current – Right(Slave) Current│ 〈 10% of typical current

Ver. 1.0

9 / 37

LC420WXE

Product Specification

3-2. Interface Connections

This LCD module employs two kinds of interface connection, a 30-pin connector is used for the module electronics and
14-pin connector is used for the integral backlight system.

3-2-1. LCD Module

- LCD Connector(CN5) : FI-X30SSL-HF (Manufactured by JAE) or IS100-L30B-C23(Manufactured by UJU)

- Mating Connector : FI-X30C2L (Manufactured by JAE) or Equivalent

Table 4. MODULE CONNECTOR(CN5) PIN CONFIGURATION

NoteDescriptionSymbolPin No.

Power Supply +12.0V

Power Supply +12.0V
Power Supply +12.0V
Power Supply +12.0V

GroundGND

GroundGND
GroundGND
GroundGND

‘H’ =JEIDA , ‘L’ or NC = VESA LVDS Select

‘H’ = Enable , ‘L’ = Disable
GroundGND
LVDS Receiver Signal(-)RA­LVDS Receiver Signal(+)RA+
GroundGND
LVDS Receiver Signal(-)RB­LVDS Receiver Signal(+)RB+
GroundGND
LVDS Receiver Signal(-)RC­LVDS Receiver Signal(+)RC+
GroundGND
LVDS Receiver Clock Signal(-)RCLK­LVDS Receiver Clock Signal(+)RCLK+
GroundGND
LVDS Receiver Signal(-)RD­LVDS Receiver Signal(+)RD+

GroundGND

OPC output (From LCM)OPC OUT

External VBR (From System)

GroundGND
GroundGND

Appendix V, VII

Appendix V

10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25

26

27

28

29
30

1

2
3
4

5

6
7
8

9

VLCD
VLCD
VLCD
VLCD

OPC_Enable

Ext VBR-B

Notes :

Ver. 1.0

1. All GND(ground) pins should be connected together to the LCD module’s metal frame.

2. All VLCD (power input) pins should be connected together.

3. All Input levels of LVDS signals are based on the EIA 644 Standard.

4. Specific pins(pin No. #10, #27~#28) are used for OPC function of the LCD module.

If not used, these pins are no connection. (Please see the Appendix V for more information.)

5. Specific pin No. #30 is used for “No signal detection” of system signal interface.

It should be GND for NSB(No Signal Black) during the system interface signal is not.

If this pin is “H”, LCD Module displays AGP(Auto Generation Pattern).

10 / 37

3-2-2. Backlight Module

LC420WXE

Product Specification

[ Master ]

1) Balance Connector

: 65002WS-03 (manufactured by YEONHO)or equivalent

2) Mating Connector

: 65002HS-03 (manufactured by YEONHO) or equivalent.

[ Slave ]

1) Balance Connector

: 65002WS-03 (manufactured by YEONHO)or equivalent

2) Mating Connector

: 65002HS-03 (manufactured by YEONHO) or equivalent.

Table 5. BACKLIGHT CONNECTOR PIN CONFIGURATION(CN2,CN3)

SymbolNo

H_Input

H_Input

FB

Master

High_Input2

NC3

Slave

High_InputHigh_Input 1

High_Input

NC

◆◆◆◆ Rear view of LCM

123

1

2 3

Master

Slave

Note

[ Note ]

1. LGD recommends that Inverter Burst dimming frequency (PWM Frequency) should be synchronized
with Sync signal.

2. LGD recommends that Inverter Burst dimming frequency (PWM Frequency) should be 100Hz or 120Hz

in terms of waterfall noise.

Ver. 1.0

11 / 37

LC420WXE

Product Specification

3-3. Signal Timing Specifications

Table 6-1& 6-2 show the signal timing required at the input of the LVDS transmitter. All of the interface signal
timings should be satisfied with the following specification for normal operation.

Table 6-1. TIMING TABLE for NTSC

DCLK Period

DCLK Frequency

Frequency

Valid

Vertical

Blank

Total

Frequency

Valid

Horizontal

Blank

Total

Table 6-2. TIMING TABLE for PAL

DCLK Period

DCLK Frequency

Frequency

Valid

Vertical

Blank

Total

Frequency

Valid

Horizontal

Blank

Total

t

CLK

f

CLK

f

V

t

VV

tVT- t

t

VT

f

H

t

HV

tHT- t

t

HT

t

CLK

f

CLK

f

V

t

VV

tVT- t

t

VT

f

H

t

HV

tHT- t

t

HT

VV

HV

VV

HV

Min. NotesUnitSymbolItem

90

1456

Min. NotesUnitSymbolItem

90

1456

Typ.

162

1528

Typ.

162

1528

Max.

15.813.812.5

80.072.463.0

636057

-768-

295228

1063790776

5047.445

-1366-

410

1776

Max.

15.813.812.5

80.072.463.0

535047

-768-

2951808

1063948776

5047.445

-1366-

410

1776

[ DE (Data Enable) Only ]

nsec

MHz

Hz

Line

Line

Line

KHz

t

CLK

t

CLK

t

CLK

nsec

MHz

Hz

Line

Line

Line

KHz

t

CLK

t

CLK

t

CLK

Note : 1. The input of HSYNC & VSYNC signal does not have an effect on normal operation(DE Only Mode).

If you use spread spectrum of EMI, add some additional clock to minimum value for clock margin.

2. The performance of the electro-optical characteristics may be influenced by variance of the vertical

refresh rate and the horizontal frequency

3. Timing should be set based on clock frequency.

Ver. 1.0

12 / 37

3-4. Signal Timing Waveforms

LC420WXE

Product Specification

DCLK

First data

Second data

tCLK

DE(Data Enable)

0.5 VDD

Invalid data

Invalid data

DE, Data

Valid data

Pixel 0,0

Valid data

Pixel 1,0

0.7VDD

Pixel 2,0

Pixel 3,0

0.3VDD

Invalid data

Invalid data

tHV

DE(Data Enable)

Ver. 1.0

tHT

1 768

tVV

tVT

13 / 37

LC420WXE

Product Specification

3-5. Color Data Reference

The brightness of each primary color(red,green,blue) is based on the 8-bit gray scale data input for the color.
The higher binary input, the brighter the color. Table 7 provides a reference for color versus data input.

Table 7. COLOR DATA REFERENCE

Input Color Data

Basic

Color

RED

Color

Black 0 0 0 0 0 0 0 00 0 0 0 0 0 0 00 0 0 0 0 0 0 0

Red (255)

Green (255)

Blue (255)

Cyan

Magenta

Yellow

White

MSB LSB

1 1 1 1 1 1 1 1RED (255)

RED

GREEN

MSB LSB

BLUE

MSB LSB

B7 B6 B 5 B4 B 3 B2 B1 B0G7 G6 G5 G4 G3 G2 G1 G0R7 R6 R5 R4 R3 R2 R1 R0

0 0 0 0 0 0 0 00 0 0 0 0 0 0 01 1 1 1 1 1 1 1

0 0 0 0 0 0 0 01 1 1 1 1 1 1 10 0 0 0 0 0 0 0

1 1 1 1 1 1 1 10 0 0 0 0 0 0 00 0 0 0 0 0 0 0

1 1 1 1 1 1 1 11 1 1 1 1 1 1 10 0 0 0 0 0 0 0

1 1 1 1 1 1 1 10 0 0 0 0 0 0 01 1 1 1 1 1 1 1

0 0 0 0 0 0 0 01 1 1 1 1 1 1 11 1 1 1 1 1 1 1

1 1 1 1 1 1 1 11 1 1 1 1 1 1 11 1 1 1 1 1 1 1

0 0 0 0 0 0 0 00 0 0 0 0 0 0 00 0 0 0 0 0 0 0RED (000) Dark

0 0 0 0 0 0 0 00 0 0 0 0 0 0 00 0 0 0 0 0 0 1RED (001)

............

0 0 0 0 0 0 0 00 0 0 0 0 0 0 01 1 1 1 1 1 1 0RED (254)

0 0 0 0 0 0 0 00 0 0 0 0 0 0 0

0 0 0 0 0 0 0 00 0 0 0 0 0 0 00 0 0 0 0 0 0 0GREEN (000) Dark

GREEN

BLUE

Ver. 1.0

BLUE (000) Dark

0 0 0 0 0 0 0 00 0 0 0 0 0 0 10 0 0 0 0 0 0 0GREEN (001)

............

0 0 0 0 0 0 0 01 1 1 1 1 1 1 00 0 0 0 0 0 0 0GREEN (254)

1 1 1 1 1 1 1 10 0 0 0 0 0 0 0GREEN (255)

0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 00 0 0 0 0 0 0 00 0 0 0 0 0 0 0

0 0 0 0 0 0 0 10 0 0 0 0 0 0 00 0 0 0 0 0 0 0BLUE (001)

............

1 1 1 1 1 1 1 00 0 0 0 0 0 0 00 0 0 0 0 0 0 0BLUE (254)

1 1 1 1 1 1 1 10 0 0 0 0 0 0 00 0 0 0 0 0 0 0BLUE (255)

14 / 37

3-6. Power Sequence

3-6-1. LCD Driving circuit

LC420WXE

Product Specification

Power Supply For LCD

V

LCD

Interface Signal (Tx)

Option Signal
(LVDS_select)

Power for Lamp

Table 8. POWER SEQUENCE

Parameter

0V

0V

10%

90%

T1

T2

30%

90%

Valid Data

T5

T2

Invalid
Data

T8

Unit

ms20-0.5T1

ms--0.5T2

ms--200T3

--200T4

--0T5

--0T8

5

ms

ms

s--2.0T6

ms0.5T7

sT2 + T3T9

Invalid
Data

T3 T4

T7

T9

Value

- 4

-

Lamp ON

MaxTypMin

10%

T6

Notes

4

3

3

5

4ms

Note : 1. Please avoid floating state of interface signal at invalid period.

2. When the interface signal is invalid, be sure to pull down the power supply V

3. The T3 / T4 is recommended value, the case when failed to meet a minimum specification,
abnormal display would be shown. There is no reliability problem.

4. If the on time of signals(Interface signal and Option signals) precedes the on time of Power(V

it will be happened abnormal display.

5. T6 should be measured after the Module has been fully discharged between power off and on
period.

Ver. 1.0

LCD

to 0V.

LCD

15 / 37

),

LC420WXE

Product Specification

4. Optical Specification

Optical characteristics are determined after the unit has been ‘ON’ and stable in a dark environment at
25±2°C. The values are specified at an approximate distance 50cm from the LCD surface at a viewing angle
of Φ and θ equal to 0 °.
It is presented additional information concerning the measurement equipment and method in FIG. 1.

Optical Stage(x,y)

FIG. 1 Optical Characteristic Measurement Equipment and Method

LCD Module

50cm

Pritchard 880 or
equivalent

Table 9. OPTICAL CHARACTERISTICS Ta= 25±±±±2°°°°C, V

SymbolParameter

Surface Luminance, white

Luminance Variation

Response Time

Uniformity 5ms1--δ

RED

GREEN

Color Coordinates
[CIE1931]

BLUE

WHITE

Viewing Angle (CR>10)

x axis, right(φ=0°)

x axis, left (φ=180°)

y axis, up (φ=90°)

y axis, down (φ=270°)

WH

WHITE

BLACK

G TO G

Rx

Typ

-0.03

=12.0V, fV=60Hz, Dclk=72.4MHz, IBL=135mA

LCD

Value

MaxTypMin

1200800

500400L

2

1.35Pδ

1.75Pδ

0.637

0.335Ry

0.290Gx

0.611Gy

0.145Bx

Typ

+0.03

0.062By

0.279Wx

0.292Wy

--89θr

--89θl

--89θu

--89θd

rms

NoteUnit

1CRContrast Ratio

2cd/m

3

4ms85-G to GGray-to-Gray

6degree

7---Gray Scale

Ver. 1.0

16 / 37

Product Specification

Note : 1. Contrast Ratio(CR) is defined mathematically as :

LC420WXE

Contrast Ratio =

Surface Luminance with all white pixels
Surface Luminance with all black pixels

It is measured at center 1-point.

2. Surface luminance are determined after the unit has been ‘ON’ and 1 Hour after lighting the

backlight in a dark environment at 25±2°C. Surface luminance is the luminance value at center
1-point across the LCD surface 50cm from the surface with all pixels displaying white.
For more information see the FIG. 2.

3. The variation in surface luminance , δ WHITE is defined as :

δ WHITE(5P) = Maximum(L

Where L

on1

to L

are the luminance with all pixels displaying white at 5 locations .

on5

on1,Lon2

, L

on3

, L

on4

, L

) / Minimum(L

on5

on1,Lon2

, L

on3

, L

on4

, L

on5

)

For more information, see the FIG. 2.

4. Response time is the time required for the display to transition from G(N) to G(M) (Rise Time, TrR)
and from G(M) to G(N) (Decay Time, TrD). For additional information see the FIG. 3. (N<M)

※ G to G Spec stands for average value of all measured points.

Photo Detector : RD-80S / Field : 2˚

5. Gray to Gray Response time uniformity is Reference data. Please see Appendix VIII.

6. Viewing angle is the angle at which the contrast ratio is greater than 10. The angles are

determined for the horizontal or x axis and the vertical or y axis with respect to the z axis which
is normal to the LCD module surface. For more information, see the FIG. 4.

7. Gray scale specification

Gamma Value is approximately 2.2. For more information, see the Table 10.

Table 10. GRAY SCALE SPECIFICATION

Ver. 1.0

Luminance [%] (Typ)Gray Level

0.08L0

0.28L15

1.05L31

2.50L47

4.69L63

7.67L79

11.47L95

16.11L111

21.64L127

28.07L143

35.43L159

43.73L175

52.99L191

63.23L207

74.47L223

86.72L239

100L255

17 / 37

Product Specification

Measuring point for surface luminance & measuring point for luminance variation

H

A

③③③③②②②②

LC420WXE

V

①①①①

B

A : H / 4 mm

④④④④

FIG.2 Measure Point for Luminance

Response time is defined as the following figure and shall be measured by switching the input signal for
“Gray(N)” and “Gray(M)”.

TrR

100

90

⑤⑤⑤⑤

TrD

B : V / 4 mm
@ H,V : Active Area

Ver. 1.0

Optical
Response

10

0

Gray(N)

N,M = 0(Black)~255(White), N<M

FIG.3 Response Time

Gray(M)

Gray(N)

18 / 37

Dimension of viewing angle range

LC420WXE

Product Specification

φ

= 180°, Left

φ

= 270°, Down

Normal

θ

φ

FIG.4 Viewing Angle

E

Y

φ

= 90°, Up

φ

= 0°, Right

Ver. 1.0

19 / 37

LC420WXE

Product Specification

5. Mechanical Characteristics

The contents provide general mechanical characteristics. In addition the figures in the next page are detailed
mechanical drawing of the LCD module.

Table 11. MECHANICAL CHARACTERISTICS

ValueItem

983.0 mmHorizontal

Outline Dimension

Bezel Area

Active Display Area

Surface Treatment

10.0 Kg (Typ.) , 10.5 Kg (Max.) Weight

Hard coating(3H)
Semi-glare treatment of the front polarizer

576.0 mmVertical

47.3 mmDepth

939.0 mmHorizontal

531.0 mmVertical

930.25 mmHorizontal

523.01 mmVertical

Note : 1.Please refer to a mechanic drawing in terms of tolerance at the next page.

Ver. 1.0

20 / 37

<FRONT VIEW>

LC420WXE

Product Specification

Ver. 1.0

21 / 37

<REAR VIEW>

LC420WXE

Product Specification

Ver. 1.0

22 / 37

Product Specification

6. Reliability

Table 12. ENVIRONMENT TEST CONDITION

Vibration test

5

(non-operating)

LC420WXE

ConditionTest ItemNo.

Ta= 60°C, 75%RH, 240h High temperature storage test1

Ta= -20°C 240hLow temperature storage test2

Ta= 50°C 60%RH 240hHigh temperature operation test3

Ta= 0°C 240hLow temperature operation test4

Wave form : random
Vibration level : 1.0Grms
Bandwidth : 10-300Hz
Duration : X,Y,Z, 30 min

Each direction per 10 min

Shock level : 50Grms

Shock test

6

(non-operating)

Altitude operating

8

storage / shipment

Waveform : half sine wave, 11ms
Direction : ±X, ±Y, ±Z

One time each direction

Ta= 40 °C ,90%RHHumidity condition Operation7

0 - 15,000 ft
0 - 40,000 ft

Note : Before and after Reliability test, LCM should be operated with normal function.

Ver. 1.0

23 / 37

Product Specification

7. International standards

7-1. Safety

a) UL 60065, 7thEdition, dated June 30, 2003, Underwriters Laboratories, Inc.,

Standard for Audio, Video and Similar Electronic Apparatus.

b) CAN/CSA C22.2, No. 60065:03, Canadian Standards Association,

Standard for Audio, Video and Similar Electronic Apparatus.

c) IEC60065:2001, 7thEdition CB-scheme and EN 60065:2002,

Safety requirements for Audio, Video and Similar Electronic Apparatus..

LC420WXE

7-2. EMC

a) ANSI C63.4 “Methods of Measurement of Radio-Noise Emissions from Low-Voltage Electrical and

Electrical Equipment in the Range of 9kHZ to 40GHz. “American National Standards Institute(ANSI),
1992

b) CISPR13 "Limits and Methods of Measurement of Radio interference characteristics of Sound

and Television broadcast receivers and associated equipment"

CISPR22 "Limits and Methods of Measurement of Radio interference characteristics of Information

Technology Equipment" International Special Committee on Radio Interference.

c) EN55013 "Limits and Methods of Measurement of Radio interference characteristics of Sound and

Television broadcast receivers and associated equipment"

EN55022 "Limits and Methods of Measurement of Radio interference characteristics of Information

Technology Equipment" European Committee for Electro Technical Standardization.(CENELEC),
1988(Including A1:2000)

Ver. 1.0

24 / 37

Product Specification

8. Packing

8-1. Designation of Lot Mark

a) Lot Mark

A B C D E F G H I J K L M

A,B,C : SIZE(INCH) D : YEAR
E : MONTH F ~ M : SERIAL NO.

Note

1. YEAR

LC420WXE

Year

Mark

321

200452005

4

200320022001

2006720078200892009

6

2. MONTH

Month

Mark

Apr5May

4

Jun7Jul8Aug9Sep

6

b) Location of Lot Mark

Serial No. is printed on the label. The label is attached to the backside of the LCD module.
This is subject to change without prior notice.

2010

0

Oct

A

Nov

B

DecMarFebJan

C321

8-2. Packing Form

a) Package quantity in one box : 13 pcs

b) Box Size :1140 mm(L) X 990 mm(W) X 810 mm(H)

Ver. 1.0

25 / 37

LC420WXE

Product Specification

9. Precautions

Please pay attention to the followings when you use this TFT LCD module.

9-1. Mounting Precautions

(1) You must mount a module using specified mounting holes (Details refer to the drawings).
(2) You should consider the mounting structure so that uneven force (ex. Twisted stress) is not applied to the

module. And the case on which a module is mounted should have sufficient strength so that external
force is not transmitted directly to the module.

(3) Please attach the surface transparent protective plate to the surface in order to protect the polarizer.

Transparent protective plate should have sufficient strength in order to the resist external force.
(4) You should adopt radiation structure to satisfy the temperature specification.
(5) Acetic acid type and chlorine type materials for the cover case are not desirable because the former

generates corrosive gas of attacking the polarizer at high temperature and the latter causes circuit break
by electro-chemical reaction.

(6) Do not touch, push or rub the exposed polarizers with glass, tweezers or anything harder than HB

pencil lead. And please do not rub with dust clothes with chemical treatment.

Do not touch the surface of polarizer for bare hand or greasy cloth.(Some cosmetics are detrimental

to the polarizer.)
(7) When the surface becomes dusty, please wipe gently with absorbent cotton or other soft materials like

chamois soaks with petroleum benzine. Normal-hexane is recommended for cleaning the adhesives
used to attach front / rear polarizers. Do not use acetone, toluene and alcohol because they cause
chemical damage to the polarizer. * There is no problem of Panel crack under 5kgf / φ10mm

(8) Wipe off saliva or water drops as soon as possible. Their long time contact with polarizer causes

deformations and color fading.

(9) Do not open the case because inside circuits do not have sufficient strength.

9-2. Operating Precautions

(1) The spike noise causes the mis-operation of circuits. It should be lower than following voltage :

V=±200mV(Over and under shoot voltage)

(2) Response time depends on the temperature.(In lower temperature, it becomes longer.)
(3) Brightness depends on the temperature. (In lower temperature, it becomes lower.)

And in lower temperature, response time(required time that brightness is stable after turned on) becomes

longer.

(4) Be careful for condensation at sudden temperature change. Condensation makes damage to polarizer or

electrical contacted parts. And after fading condensation, smear or spot will occur.
(5) When fixed patterns are displayed for a long time, remnant image is likely to occur.
(6) Module has high frequency circuits. Sufficient suppression to the electromagnetic interference shall be

done by system manufacturers. Grounding and shielding methods may be important to minimized the

interference.
(7) Please do not give any mechanical and/or acoustical impact to LCM. Otherwise, LCM can’t be operated

its full characteristics perfectly.

(8) A screw which is fastened up the steels should be a machine screw.

(if not, it causes metallic foreign material and deal LCM a fatal blow)
(9) Please do not set LCD on its edge.
(10) It is recommended to avoid the signal cable and conductive material over the inverter transformer

for it can cause the abnormal display and temperature rising.

(11) Partial darkness may happen during 3~5 minutes when LCM is operated initially in condition that

luminance is under 40% at low temperature (under 5℃). This phenomenon which disappears naturally
after 3~5 minutes is not a problem about reliability but LCD characteristic.

Ver. 1.0

26 / 37

LC420WXE

Product Specification

9-3. Electrostatic Discharge Control

Since a module is composed of electronic circuits, it is not strong to electrostatic discharge. Make certain that
treatment persons are connected to ground through wrist band etc. And don’t touch interface pin directly.

9-4. Precautions for Strong Light Exposure

Strong light exposure causes degradation of polarizer and color filter.

9-5. Storage

When storing modules as spares for a long time, the following precautions are necessary.

(1) Store them in a dark place. Do not expose the module to sunlight or fluorescent light. Keep the temperature

between 5°C and 35°C at normal humidity.

(2) The polarizer surface should not come in contact with any other object.

It is recommended that they be stored in the container in which they were shipped.

9-6. Handling Precautions for Protection Film

(1) The protection film is attached to the bezel with a small masking tape

When the protection film is peeled off, static electricity is generated between the film and polarizer.

This should be peeled off slowly and carefully by people who are electrically grounded and with well ion­blown equipment or in such a condition, etc.

(2) When the module with protection film attached is stored for a long time, sometimes there remains a very

small amount of glue still on the bezel after the protection film is peeled off.

(3) You can remove the glue easily. When the glue remains on the bezel surface or its vestige is recognized,

please wipe them off with absorbent cotton waste or other soft material like chamois soaked with normal­hexane.

.

Ver. 1.0

27 / 37

Product Specification

# APPENDIX-I-1

■ REQUIRED SIGNAL ASSIGNMENT FOR LVDS TRANSMITTER ( Pin9=“L” )

LC420WXE

Host System

24 Bit

RED0
RED1
RED2
RED3
RED4
RED5
RED6

RED7
GREEN0
GREEN1
GREEN2
GREEN3
GREEN4
GREEN5
GREEN6
GREEN7

BLUE0
BLUE1
BLUE2
BLUE3
BLUE4
BLUE5
BLUE6
BLUE7

Hsync

Vsync

Data Enable

CLOCK

DS90C385

or Compatible

51
52
54
55
56
3
50
2
4
6
7
11
12
14
8
10
15
19
20
22
23
24
16
18
27
28
30
31

TxOUT0­TxOUT0+

TxOUT1­TxOUT1+

TxOUT2­TxOUT2+

TxCLKOUT­TxCLKOUT+

TxOUT3­TxOUT3+

FI-X30SSL-HF

48

47

46

45

42

41

40

39

38

37

GND

GND

12
13

15
16

18
19

21
22

24
25

30

Timing

Controller

100ΩΩΩΩ

100ΩΩΩΩ

100ΩΩΩΩ

100ΩΩΩΩ

100ΩΩΩΩ

9

RxIN0­RxIN0+

RxIN1­RxIN1+

RxIN2­RxIN2+

RxCLKIN­RxCLKIN+

RxIN3­RxIN3+

LG / DISM

LCD Test

LCD Module

Note: 1. The LCD Module uses a 100 Ohm[Ω] resistor between positive and negative lines of each receiver

input.

2. Refer to LVDS Transmitter Data Sheet for detail descriptions. (DS90C385 or Compatible)

3. ‘7’ means MSB and ‘0’ means LSB at R,G,B pixel data.

Ver. 1.0

28 / 37

Product Specification

# APPENDIX-I-2

■ REQUIRED SIGNAL ASSIGNMENT FOR LVDS TRANSMITTER ( Pin9=“H” )

LC420WXE

Host System

24 Bit

RED0
RED1
RED2
RED3
RED4
RED5
RED6

RED7
GREEN0
GREEN1
GREEN2
GREEN3
GREEN4
GREEN5
GREEN6
GREEN7

BLUE0
BLUE1
BLUE2
BLUE3
BLUE4
BLUE5
BLUE6
BLUE7

Hsync

Vsync

Data Enable

CLOCK

DS90C385

or Compatible

50
2
51
52
54
55
56
3
8
10
4
6
7
11
12
14

16
18
15
19
20
22
23
24
27
28
30
31

TxOUT0­TxOUT0+

TxOUT1­TxOUT1+

TxOUT2­TxOUT2+

TxCLKOUT­TxCLKOUT+

TxOUT3­TxOUT3+

FI-X30SSL-HF

48

47

46

45

42

41

40

39

38

37

GND

Vcc

12
13

15
16

18
19

21
22

24
25

30

Timing

Controller

100ΩΩΩΩ

100ΩΩΩΩ

100ΩΩΩΩ

100ΩΩΩΩ

100ΩΩΩΩ

9

RxIN0­RxIN0+

RxIN1­RxIN1+

RxIN2­RxIN2+

RxCLKIN­RxCLKIN+

RxIN3­RxIN3+

LG / DISM
LCD Test

LCD Module

Note: 1. The LCD module uses a 100 Ohm[Ω] resistor between positive and negative lines of each receiver

input.

2. Refer to LVDS Transmitter Data Sheet for detail descriptions. (DS90C385 or Compatible)

3. ‘7’ means MSB and ‘0’ means LSB at R,G,B pixel data.

Ver. 1.0

29 / 37

# APPENDIX-II

■■■■ LC420WXE-SBA1 – Pallet Ass’y

LC420WXE

Product Specification

Ver. 1.0

MATERIALDESCRIPTIONNO.

LCD Module1

42INCHBAG2

MASKING 20MMX50MTAPE3

PAPER 1140X990X130MMPALLET4

EPSPACKING,BOTTOM5

EPSPACKING,TOP6

PAPER ANGLE,POST7

PAPERANGLE,PACKING8

STEELBAND,CLIP9

PPBAND10

YUPO 80G 100X100LABEL11

30 / 37

# APPENDIX- III

■ LCM Label

LC420WXE

Product Specification

Model

UL, TUV Mark

LC420WXE

LC420WXE

LC420WXELC420WXE
(SB)(A1)

(SB)(A1)

(SB)(A1)(SB)(A1)

Serial No.

LGD Logo

US PATENT No. Origin

■■■■ Serial No. (See CAS 25page for more information)

1 2 3 4 5 6 7 9 10 11 12

8

13

Ver. 1.0

Inch

Year

Month

Serial No.

M Ass’y Factory code

31 / 37

# APPENDIX- IV

■ Pallet Label

LC420WXE

Product Specification

LC420WXE

SBA1

13 PCS

MADE IN KOREA RoHS Verified

XXXXX XXXXXXXX XXX XXX XXXX

001/01-01

Ver. 1.0

32 / 37

Product Specification

# APPENDIX- V

Option Pin Circuit Block Diagram

Circuit Block Diagram of LVDS Format Selection pin

LVDS Select Pin : Pin 9

1KΩΩΩΩ

LVDS Select

(Pin 9)

LC420WXE

LVDS Select

50KΩΩΩΩ

ASIC

(TCON)

System Side LCM Side

Circuit Block Diagram of OPC Enable Selection pin

OPC Enable Pin : Pin 10

50KΩΩΩΩ

R1

OPC_Enable

(Pin 10)

100 ΩΩΩΩ

3.3KΩΩΩΩ

System Side

R1 ≤≤≤≤ 1KΩΩΩΩ

LCM Side

VCC

OPC_Enable

ASIC

(TCON)

Ver. 1.0

33 / 37

# APPENDIX- VI-1

1. DC Specification

LC420WXE

Product Specification

LVDS Input characteristics

NotesUnitMaxMinSymbolDescription

-mV600200|VID|LVDS Single end Voltage

LVDS Common mode Voltage

LVDS Input Voltage Range

Change in common mode Voltage

2. AC Specification

LVDS Clock

LVDS Data

LVDS Clock to Data Skew Margin

LVDS Clock/DATA Rising/Falling time

Effective time of LVDS

tSKEW

tSKEW

CM

IN

CM

T

clk

A

(F

= 1 /T

clk

)

clk

-V1.51.1V

-V1.80.7V

-mV250ΔV

A

80%

20%

t

RF

NotesUnitMaxMinSymbolDescription

SKEW

RF

eff

)/7|t

clk

)/7t

clk

-ps|(0.25*T

2260 ps(0.3*T

-ps±360t

Notes : 1. All Input levels of LVDS signals are based on the EIA 644 Standard.

2. If tRFisn’t enough, t

Ver. 1.0

should be meet the range.

eff

34 / 37

# APPENDIX- VI-2

LC420WXE

Product Specification

LVDS Input characteristics

350ps

V+
data

Vcm

V­data

V+
clk

Vcm

0.5tui

tui

│VID
│

350ps

teff

tui : Unit
Interval

V­clk

Ver. 1.0

35 / 37

LC420WXE

# APPENDIX 3

Product Specification

# APPENDIX- VII

LVDS Data-Mapping info. (8bit)

■ LVDS Select : “H” Data-Mapping (JEIDA format)

RCLKP

RCLKM

RAP

RBP

RCP

RDP

R17 R16 R15 R14G12 R13R12’ R12R13’ G12”

B12 G17 G16 G15B13 G14G13’ G13G14’ B13”

V

SYNCHSYNC

B11 B10 G11 G10X R11R10’ R10R11’ X”

B17 B16DE B15B14’ B14B15’ DE”

■ LVDS Select : “L” Data-Mapping (LG format)

RCLKP

RCLKM

RAP

RBP

RCP

RDP

Ver. 1.0

R15 R14 R13 R12G10 R11R10’ R10R11’ G10”

B10 G15 G14 G13B11 G12G11’ G11G12’ B15”

V

SYNCHSYNC

B17 B16 G17 G16X R17R16’ R16R17’ X”

B15 B14DE B13B12’ B12B13’ DE”

36 / 37

LC420WXE

−

Product Specification

# APPENDIX- VIII

Gray to Gray Response Time Uniformity

This is only the reference data of G to G and uniformity for LC420WXE-SBA1 model.

1. G to G Response Time :
Response time is defined as Figure3 and shall be measured by switching the input signal for
“Gray (N) ” and “Gray(M)”.(32Gray Step at 8bit)

2. G to G Uniformity
The variation of G to G Uniformity , δ G to G is defined as :

)()(

G to G Uniformity =

GtoGTypical

GtoGTypicalGtoGMaximum

)(

*Maximum (GtoG) means maximum value of measured time (N, M = 0 (Black) ~ 255(White), 32 gray step).

≤1

0Gray

0Gray

32Gray

64Gray

…

223Gray

255Gray

TrD:32G0G

TrD:64G0G

…

TrD:223G0G

TrD:255G0G

TrD:255G223G…TrD:255G64GTrD:255G32G

3. Sampling Size : 2 pcs

4. Measurement Method : Follow the same rule as optical characteristics measurement.

5. Current Status

Below table is actual data of production on DEC.08. 2008 ( LGD RV Event Sample)

G to G Response Time [ms]

# 1

# 2

Min.

2.4

2.1

Max.

7.1

6.8

255Gray223Gray…64Gray32Gray

TrR:0G225GTrR:0G223G…TrR:0G64GTrR:0G32G

TrR:32G255GTrR:32G223G…TrR:32G64G

TrR:64G255GTrR:64G223G…TrD:64G32G

…………

TrR:223G255G…TrD:223G64GTrD:223G32G

Uniformity

0.42

0.36

Ver. 1.0

37 / 37