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