LG Display LC420WU6-SLA1 Specification

(

Preliminary Specification

))(

Final Specification

●

LC420WU6

Product Specification

SPECIFICATION

FOR

APPROVAL

42.0” WUXGA TFT LCDTitle

MODEL

APPROVED BY

/

/

/

GeneralBUYER

SIGNATURE

DATE

LG.Philips LCD Co., Ltd.SUPPLIER

LC420WU6*MODEL

SLA1(RoHS Verified)SUFFIX

*When you obtain standard approval,

please use the above model name without suffix

APPROVED BY

J.H. Yoon /Senior Manager

REVIEWED BY

J.T. Kim / Manager

PREPARED BY

D.K. Yang / Engineer

SIGNATURE

DATE

Please return 1 copy for your confirmation with

your signature and comments.

Ver. 1.0

TV Product Development Dept.

LG. Philips LCD Co., Ltd

1 /35

Product Specification

CONTENTS

LC420WU6

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 DATA REFERENCE3-5

POWER SEQUENCE3-6

OPTICAL SPECIFICATIONS4

MECHANICAL CHARACTERISTICS5

ITEMNumber

Page

1COVER

2

3

4

5

6

6

10

11

13

14

15

17

21

Appendix

Ver. 1.0

RELIABILITY6

INTERNATIONAL STANDARDS7

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

25

25

25

26

26

26

27

27

27

28

28

28

28

29~33

2 /35

Product Specification

RECORD OF REVISIONS

DescriptionPageRevision DateRevision No.

Final SpecificationAugust, 06, 20071.0

LC420WU6

Ver. 1.0

3 /35

LC420WU6

Product Specification

1. General Description

The LC420WU6 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 display type which is operating in the normally black mode. It has a
measured active display area with WUXGA resolution (1080 vertical by 1920 horizontal pixel array).
Each pixel is divided into Red, Green and Blue sub-pixels or dots which are arrayed in vertical stripes.
Gray scale or the luminance of the sub-pixel color is determined with a 10-bit gray scale signal for each dot.
Therefore, it can present a palette of more than 1.07 Billon(FRC) colors.
It has been designed to apply the 10-bit 2-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.

42.02

inch diagonally

+12.0V

LVDS

Select

DCR
Enable

V

BR_EXT

V

BR_OUT

Sync.Sel

Sync.PWM

High Input

High Input

CN1

(51pin)

CN4

(4 pin)

General Features

SDRAM

MEM
CTRL

RGB

LVDS Rx (Receiver)

DCR Controller

ODC Controller

Timing Controller

Power Circuit

CN2, 3pin, 18 Lamps/@130 mA

CN3, 3pin, 18 Lamps/@130mA

42.02 inches(1067.31mm) diagonalActive Screen Size

983.0(H) x 576.0 (V) x 47.3 mm(D) (Typ. Without inverter)Outline Dimension

0.4845 mm x 0.4845 mmPixel Pitch

1920 horiz. by 1080 vert. Pixels, RGB stripe arrangementPixel Format

8-bit FRC, 1.07Billon colorsColor Depth

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

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

Block

EEPROM

(LUT)

SCL

Mini-LVDS(RGB)

SDA

Source Driver Circuit

S1 S1920

G1

Gate Driver Circuit

TFT - LCD Panel

(11920 × RGB × 1080 pixels)

G1080

Back light Assembly (18 EEFL)

Ver. 1.0

Total 172 W (Typ.) (Logic = 8.8 W, Inverter =163.2 W [IRMS=] ) Power Consumption

(11.0Kg) (Typ.) (12.0Kg) (Max.)Weight

Transmissive mode, Normally blackDisplay Mode

Hard coating(3H), Anti-glare treatment of the front polarizer (Haze 13%)Surface Treatment

4 /35

LC420WU6

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

Operating Temperature

Storage Temperature

Operating Ambient Humidity

Storage Humidity

LCD circuit

LCD

OP

ST

OP

ST

°C+500T

°C+60-20T

%RH9010H

%RH9010H

Notes : 1. Temperature and relative humidity range are shown in the figure below.

Wet bulb temperature should be 39 °C Max, and no condensation.

2. Gravity mura can be guaranteed under 40℃condition.

90%

60

60%

at 25 ± 2 °CV [DC]+14.0-0.3V

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 /35

LC420WU6

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 Is used for the EEFL
backlight and inverter circuit.

Table 2. ELECTRICAL CHARACTERISTICS

Value

Parameter Symbol

Circuit :

Power Input Voltage

LCD

MaxTypMin

V

12.612.011.4V

DC

NoteUnit

Power Input Current

Power Consumption

Rush current

I

LCD

LCD

RUSH

-

-

-P

Notes : 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 1ms (min)

White : 1023Gray
Black : 0Gray

954734

1125866

11.488.8

=12.0V, 25 ± 2°C, fV=60Hz

LCD

1mA

2mA

1Watt

3A3--I

Ver. 1.0

Mosaic Pattern(8 x 6)

6 /35

Product Specification

Table 3. ELECTRICAL CHARACTERISTICS

LC420WU6

Parameter Symbol

Values

NotesUnit

MaxTypMin

Backlight Assembly :

Operating Voltage

(one side,fBL=46KHz, I

BL= 129.6mArms)

Operating Current (one side)

Established Starting
Voltage (one side)

Operating Frequency

Striking Time

Power Consumption

0

25

℃

℃

)

BL

BL

V

S

BL

TIME

BL

-950-V

-130-I

RMS

RMS

1350--

1100--

RMS

1, 2V

1mA

1, 3V

4kHz484644f

3sec1.5--S

6Watt163.2P

9%10020PWM dutyBurst Dimming Duty

9Hz180-1501/TBurst Dimming Frequency

Parameter Symbol

Values

NotesUnit

MaxTypMin

Lamp : (APPENDIX-V)

Lamp Voltage (one side)

Lamp Current (one side)

Discharge Stabilization Time

Lamp Frequency

Lamp Temperature

Established Starting
Voltage(one side)

0

25

℃

℃

LAMP

LAMP

S

LAMP

LAMP

S

S

10501000850V

-7.2-I

RMS

RMS

KHz514641f

°C130T

1350V

1100V

RMS

1, 2V

1mA

1, 5Min3--T

1, 3V

7Hrs50,000Life Time

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, 7.2mA/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 [

V

S

] 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 /35

)

LC420WU6

Product Specification

Vpk- pk

S

TIME

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

4. Lamp frequency may produce interference 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 its harmonics range in order to prevent interference.

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

* Asymmetry rate:

I

p

| I p– I –p| / Iopx 100%

* Distortion rate

I

-p

I p(or I –p) / I

op

8 /35

Product Specification

9. The reference method of burst dimming duty ratio.
It is recommended to use synchronous V-sync frequency for prevent waterfall(Vsync x 3 =Burst

Frequency)

T

A

PWM

Output of Inverter to Lamp

90%

LC420WU6

+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 1second after turn on

※

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

10. The Cable between the backlight connector and its inverter power supply should be connected directly
with a minimized length. The longer cable between the backlight and the inverter may cause the lower
luminance of lamp and may require more higher starting voltage ( Vs ).

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 typ

Ver. 1.0

± 10%

.

9 /35

LC420WU6

Product Specification

3-2. Interface Connections

This LCD module employs two kinds of interface connection, a 51-pin connector is used for the module
electronics and Master 3-pin and Slave 3-pin connectors are used for the integral backlight system.

3-2-1. LCD Module

- LCD Connector(CN1): FI-R51S-HF(manufactured by JAE) or KN25-51P-0.5SH(manufactured by Hirose)

- Mating Connector : FI-R51HL(JAE) or compatible

Table 4. MODULE CONNECTOR(CN1) PIN CONFIGURATION

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

GND

GND

RO0N
RO0P
RO1N
RO1P

RO2N

RO2P

GND

ROCLKN
ROCLKP

GND
RO3N

RO3P

Reserved

RO4N
RO4N

DescriptionSymbolNo

Ground

No ConnectionNC

No ConnectionNC

No ConnectionNC

No ConnectionNC

No ConnectionNC

‘H’ =JEIDA , ‘L’ = VESA LVDS Select

External VBRVBR_EXT

VBR outputVBR_OUT

‘H’ = Enable , ‘L’ = Disable DCR_Enable

Ground

FIRST CHANNEL 0­FIRST CHANNEL 0+
FIRST CHANNEL 1-

FIRST CHANNEL 1+

FIRST CHANNEL 2-

FIRST CHANNEL 2+
Ground

FIRST CLOCK CHANNEL C-

FIRST CLOCK CHANNEL C+
Ground

FIRST CHANNEL 3-

FIRST CHANNEL 3+

FIRST CHANNEL 4-
FIRST CHANNEL 4+

No connection or GND

No

27

28

29

30

31

32
33

34

35

36

37

38
39
40

41

42

43

44

45

46
47
48

49

50

51

-

Symbol

Reserved

RE0N

RE0P

RE1N

RE1P

RE2N
RE2P

GND

RECLKN

RECLKP

GND

RE3N
RE3P

RE4N
RE4P

Reserved

Reserved

GND

GND

GND

NC
VLCD

VLCD

VLCD

VLCD

-

Description

Ground

SECOND CHANNEL 0-

SECOND CHANNEL 0+

SECOND CHANNEL 1-

SECOND CHANNEL 1+

SECOND CHANNEL 2­SECOND CHANNEL 2+
Ground

SECOND CLOCK CHANNEL C-

SECOND CLOCK CHANNEL C+
Ground

SECOND CHANNEL 3­SECOND CHANNEL 3+

SECOND CHANNEL 4-
SECOND CHANNEL 4+

No connection or GND

No connection or GND

Ground

Ground

Ground
No connection
Power Supply +12.0V

Power Supply +12.0V

Power Supply +12.0V

Power Supply +12.0V

-

Notes :

1. The pin no 44 is LCD Test option. “AGP” (Auto Generation LCM operates Pattern) or “NSB” (No Signal
Black) is case that LVDS signals are out of frequency or abnormal condition in spite of 12 volt power
supply. LPL recommends “NSB”. ( AGP : “VCC” or “OPEN” / NSB : “GND” )

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

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

4. All Input levels of LVDS signals are based on the IEA 664 Standard.

5. Specific pins(pin No. #1~#10) are used for internal data process of the LCD module.

If not used, these pins are no connection.

6. If DCR function should be enable(‘H’), 10th pin must be connected to serial resistor which value is under
1k ohm.

Ver. 1.0

10 /35

3-2-2. Backlight Module

LC420WU6

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

3-2-3. Sync connection between LCD Module and System

There are 4 pins sync connector in the LCD module control PCB . The No.1 pin is for REFMODE which is

selected of Vsync frequency signal. The No.2 pin is for WPWM which s generated for PWM frequency
synchronically between control & inverter. The rest pins are for Ground and NC.

1) Inverter Sync Connector

: DF14-4S-1.25C (manufactured by Hirose)or equivalent

Table 6. INVERTER SYNC. CONNECTOR PIN CONFIGURATION(CN4)

NoteDescriptionSymbolPin No.

1

2

3

4

Vsync. Frequency select signal REFMODE

PWM Frequency outputWPWM

GroundGND

No connectionNC

LCD Module Control PCB

1

4

Notes:

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

2. LPL recommends that Inverter Burst dimming frequency (PWM Frequency) should be 150Hz or

180Hz.

Ver. 1.0

11 /35