LG Electronics LC420DUG-JFR1 Specification

Engineering Specification

LCM ENGINEERING

SPECIFICATION

LC420DUG

The Below Models Reference this spec
LC420DUG-JFR1-7R1-B;

*MODEL LC420DUG

SUFFIX JFR1

Update Oct.15, 2012

() Preliminary Specification

(

) Final Specification

●

Ver. 1.1

1/27

LC420DUG

Number

ITEM

Page

Engineering Specification

CONTENTS

COVER 1

CONTENTS

RECORD OF REVISIONS

1 GENERAL DESCRIPTION

2 ABSOLUTE MAXIMUM RATINGS

3 ELECTRICAL SPECIFICATIONS

3-1 ELECTRICAL CHARACTERISTICS

3-2 INTERFACE CONNECTIONS

3-3 SIGNAL TIMING SPECIFICATIONS

3-4 Panel Pixel Structure

3-5 POWER SEQUENCE

4 OPTICAL SPECIFICATIONS

5 MECHANICAL CHARACTERISTICS

6 RELIABILITY

7 INTERNATIONAL STANDARDS

7-1 SAFETY

2

3

4

5

6

6

9

12

13

14

15

21

22

23

23

7-2 ENVIRONMENT

8 PRECAUTIONS

8-1 MOUNTING PRECAUTIONS

8-2 OPERATING PRECAUTIONS

8-3 ELECTROSTATIC DISCHARGE CONTROL

8-4 PRECAUTIONS FOR STRONG LIGHT EXPOSURE

8-5 STORAGE

Ver. 1.1

23

24

24

24

25

25

25

2/27

Engineering Specification

RECORD OF REVISIONS

Revision No. Revision Date Page Description

1.0 Sep. 27, 2012 - Final Specification (First Draft)

LC420DUG

1.1 Oct. 15, 2012 6

- Update: 3-1. Electrical Characteristics
Table 2. DC ELECTRICAL CHARACTERISTICS

Ver. 1.1

3/27

LC420DUG

)

high color depth and fast response time are important.

TFT

LCD P

l

(H)

(Typ.)

LED Cathode

()

() ()

(yp)

Engineering Specification

1. General Description

The LC420DUG is a Color Active Matrix Liquid Crystal Display with an integral Light Emitting Diode (LED
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 41.92inch diagonally
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 8-bit gray scale signal for each dot.
Therefore, it can present a palette of more than 1.67M(ture) colors.
It is intended to support LCD TV, PCTV where high brightness, super wide viewing angle, high color gamut,

Power (VCC, VDD, HVDD, VGH, VGL)

Gate Control Signal

Gamma Reference Voltage

EPI (RGB & Control signal) for Left drive

Power (VCC, VDD, HVDD, VGH, VGL)

Gate Control Signal

Gamma Reference Voltage

EPI (RGB & Control Signal) for Right drive

LED Anode

LED Anode
LED Cathode

CN201 (7pin)

CN1

(50pin)

CN2

(50pin)

G1

G1080

S1 S1920

(1920 × RGB × 1080 pixels)

General Features

Active Screen Size 41.92 inches(1067.31mm) diagonal

Outline Dimension

Pixel Pitch 0.4833 mm x 0.4833 mm

Pixel Format 1920 horiz. by 1080 vert. Pixels, RGB stripe arrangement

Color Depth 8bit, 16.7 Million colors

Luminance, White 300 cd/m

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

955.8

X 554.4(V) X 35.0(B) mm

2

(Center 1point ,Typ.)

Source Driver Circuit

-

ane

[Gate In Panel]

Back light Assembly

Power Consumption Total 54.45W [Logic= 6.0W, LED Driver=48.45W (IF_

Weight 6.2 kg (TBD.)

Display Mode Transmissive mode, Normally black

Surface Treatment Hard coating(3H), Anti-reflection treatment of the front polarizer (Haze 1%)

Ver. 1.1

cathode=380mA))

4/27

LC420DUG

to

the

LCD

module

.

90%

20

Engineering Specification

2. Absolute Maximum Ratings

The following items are maximum values which, if exceeded, may cause faulty operation or permanent damage

Table 1. ABSOLUTE MAXIMUM RATINGS

Parameter Symbol

Logic&EPI Power Voltage VCC -0.5 +2.2 VDC

Gate High Voltage VGH +18.0 +30.0 VDC

Gate Low Voltage VGL -8.0 -4.0 VDC

Value

Unit Note

Min Max

Source D-IC Analog Voltage VDD -0.3 +18.0 V

Gamma Ref. Voltage (Upper) VGMH ½VDD-0.5 VDD+0.5 VDC

Gamma Ref. Voltage (Low) VGML -0.3 ½ VDD+0.5 VDC

V

F1 - +127

LED Input Voltage Forward Voltage

VF2 -+83

Panel Front Temperature T

SUR -+68

Operating Temperature TOP 0+50

Storage Temperature T

Operating Ambient Humidity H

Storage Humidity H

Note

1. Ambient temperature condition (Ta = 25  2 °C )

ST -20 +60

OP 10 90 %RH

ST 10 90 %RH

2. Temperature and relative humidity range are shown in the figure below. Wet bulb temperature

should be Max 39 °C and no condensation of water.

3. Gravity mura can be guaranteed below 40℃ condition.

4. The maximum operating temperature is based on the test condition that the surface temperature

of display area is less than or equal to 68 ℃ with LCD module alone in a temperature controlled
chamber. Thermal management should be considered in final product design to prevent the surface

temperature of display area from being over 68 ℃. The range of operating temperature may

degrade in case of improper thermal management in final product design.

5. The storage test condition:-20℃ temperature/90% humidity to 60℃ temperature/40% humidity ;
the operating test condition: 0℃ temperature/90% humidity to 50℃ temperature/60% humidity.

DC

VDC

°C

°C

°C

1

4

2,3

Ver. 1.1

Wet Bulb

Temperature [

0

°C]

10

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

30

40

50

60

60%

40%

10%

Humidity

[(%)RH]

Storage

Operation

5/27

LC420DUG

O

LCD ci

L

ED

backlight ci

V

(GMA10

GMA18)

0.2-H_VDD

2V

V

DC

@

@

GIP Start Pulse Voltage

VST-VGL-VGH

V

Engineering Specification

3. Electrical Specifications

It requires two kind of power inputs.

ne is employed to power for the

rcuit. The other Is used for the

rcuit.

3-1. Electrical Characteristics

Table 2. DC ELECTRICAL CHARACTERISTICS

Parameter Symbol Condition MIN TYP MAX Unit Note

Logic & EPI Power Voltage VCC - 1.62 1.8 1.98 VDC

Logic High Level Input Voltage VIH -1.4-VCCVDC

Logic Low Level Input Voltage VIL -0-0.4VDC

Source D-IC Analog Voltage VDD - 15.6 15.8 16.0 VDC

Half Source D-IC Analog

Voltage

H_VDD - 7.7 7.9 8.1 V

DC 6

V

GMH

Gamma Reference Voltage

GML

Common Voltage Vcom Reverse 6.3 6.6 6.9 V

EPI input common voltage VCM LVDS Type 0.8 VCC/2 1.3 V

EPI Input eye diagram

EPI input differential voltage Vdiff - 150 - 500 mV

Gate High Voltage VGH

Gate Low Voltage VGL

GIP Bi-Scan Voltage

GIP Refresh Voltage

GIP Operating Clock GCLK - VGL - VGH V
Total Power Current

Total Power Consumption

Veye

VGI_P

VGI_N

VGH

even/odd

LCD - - 530 1050 mA 1

I

PLCD - - 6.4 8.3 Watt 1

(GMA1 ~ GMA9) H_VDD+0.2 - VDD-0.2 VDC

~

-90--mV

25℃

@ 0℃

-

- VGL - VGH VDC

- VGL - VGH V

27.7 28 28.3 V

29.7 30 30.3 V

-5.2 -5.0 -4.8 VDC

-0.

DC

DC

5

Note:

1. The specified current and power consumption are under the VLCD=12V., 25  2°C, fV=60Hz

2. The above spec is based on the basic model.

3. All of the typical gate voltage should be controlled within 1% voltage level

4. Ripple voltage level is recommended under ±5% of typical voltage

5. In case of EPI signal spec, refer to Fig 2 for the more detail.

6. HVDD Voltage level is half of VDD and it should be between Gamma9 and Gamma10.

Ver. 1.1

condition whereas mosaic pattern(8 x 6) is displayed and f

is the frame frequency.

V

6/27

VGH

VGHM

GND

VGL

LC420DUG

Engineering Specification

Without GPM With GPM

FIG. 1 Gate Output Wave form without GPM and with GPM

EPI +

0 V

0 V

Vdiff

Vdiff

(Differential Probe)

FIG. 2-1 EPI Differential signal characteristics

EPI -

0 V

1 UI

0.5 UI

B1

(Differential Probe)

B2

FIG. 2-2 Eye Pattern of EPI Input

Vdiff

Vcm

(Active Probe)

Veye

Veye

Ver. 1.1

FIG. 3 Measure point

7/27

Engineering Specification

Val

Power Consumption

PBL-

70.376W

5

initial value at the typical LED current on condition of continuous operating at 25



2

C, based on duty 100%.

Table 3. ELECTRICAL CHARACTERISTICS (Continue)

LC420DUG

Parameter Sym bol

Backlight Assembly :

Forward Current
(one array)

Forward Voltage

Burst Dimming Duty On duty 1 100 %

Burst Dimming Frequency 1/T 95 182 Hz 7

LED Array : (APPENDIX-V)

Life Time 30,000 Hrs 6

Notes :

The design of the LED driver must have specifications for the LED array in LCD Assembly.

Anode I

Cathode I

F (anode)

F (cathode)

V

F1

V

F2

Min Typ Max

361 380 399 mAdc

102 111 120

68 74 80

ues

380 mAdc

Unit Note

Vdc 4

The electrical characteristics of LED driver are based on Constant Current driving type.
The performance of the LED in LCM, for example life time or brightness, is extremely influenced by the
characteristics of the LED Driver. So, all the parameters of an LED driver should be carefully designed.
When you design or order the LED driver, please make sure unwanted lighting caused by the mismatch of the
LED and the driver (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.

1. Electrical characteristics are based on LED Array specification.

2. Specified values are defined for a Backlight Assembly. (IBL :10 LED array/LCM)

3. Each LED array has 1 anode terminal and 1 cathode terminal.
The forward current (I

) of the anode terminal is 380mA and it supplies 380mA into one string, respectively

F

±5%

2, 3

1string(30 LED PKG)

Anode1

380mA

°°°

380mA

Cathode

6 Array (1 String)

1string(20 LED PKG)

Anode2

380mA

°°°

380mA

Cathode

4 Array (1 String)

4. The forward voltage (VF) of LED array depends on ambient temperature (Appendix-VI)

5. Maximum level of power consumption is measured at initial turn on.
Typical level of power consumption is measured after 1hrs aging at 25  2°C.

6. The life time (MTTF) is determined as the time at which brightness of the LED is 50% compared to that of

°

7. The reference method of burst dimming duty ratio.
It is recommended to use synchronous V-sync frequency to prevent waterfall
(Vsync * 2 =Burst Frequency)

Ver. 1.1

8/27

LC420DUG

This LCD module employs two kinds of interface connection, two 50

pin FFC connector are used for the

6

GCLK4

GIP GATE Clock 4

31

EPI1-EPI Receiver Signal(1

)

pply

)

pp y g

(p )

Engineering Specification

3-2. Interface Connections

-

module electronics.

3-2-1. LCD Module

-LCD Connector (CN1): TF06L-50S-0.5SH (Manufactured by HRS) or Compatible

Table 3-1. MODULE CONNECTOR(CN1) PIN CONFIGURATION

No Symbol Description No Symbol Description

1 LTD_OUT LTD OUTPUT 26 GND Ground

2 NC No Connection 27 EPI2- EPI Receiver Signal(2-)

3 GCLK1 GIP GATE Clock 1 28 EPI2+ EPI Receiver Signal(2+)

4 GCLK2 GIP GATE Clock 2 29 GND Ground

5 GCLK3 GIP GATE Clock 3 30 GND Ground

-

7 GCLK5 GIP GATE Clock 5 32 EPI1+ EPI Receiver Signal(1+)

8 GCLK6 GIP GATE Clock 6 33 GND Ground

9 VGI_N GIP Bi-Scan (Normal =VGL Rotate = VGH) 34 VCC Logic & EPI Power Voltage

10 VGI_P GIP Bi-Scan (Normal =VGH Rotate = VGL) 35 NC No Connection

11 VGH_ODD GIP Panel VDD for Odd GATE TFT 36 LOCKOUT3 LOCKOUT3

12 VGH_EVEN GIP Panel VDD for Even GATE TFT 37 NC No Connection

13 VGL GATE Low Voltage 38 GND Ground

14 VST VERTICAL START PULSE 39 GMA 18 GAMMA VOLTAGE 18 (Output From LCD)

15 GIP_Reset GIP Reset 40 GMA 16 GAMMA VOLTAGE 16

16 VCOM_L_FB VCOM Left Feed-Back Output 41 GMA 15 GAMMA VOLTAGE 15

17 VCOM_L VCOM Left Input 42 GMA 14 GAMMA VOLTAGE 14

18 GND Ground 43 GMA 12 GAMMA VOLTAGE 12

19 VDD Driver Power Su

20 VDD Driver Power Supply Voltage 45 GMA 9 GAMMA VOLTAGE 9 (Output From LCD)

21 H_VDD Half Driver Power Supply Voltage 46 GMA 7 GAMMA VOLTAGE 7

22 GND Ground 47 GMA 5 GAMMA VOLTAGE 5

23 EPI3- EPI Receiver Signal(3-) 48 GMA 4 GAMMA VOLTAGE 4

24 EPI3+ EPI Receiver Signal(3+) 49 GMA 3 GAMMA VOLTAGE 3

25 GND Ground 50 GMA 1 GAMMA VOLTAGE 1(Output From LCD)

Voltage 44 GMA 10 GAMMA VOLTAGE 10 (Output From LCD

Note :

1. Please refer to application note for details.

(GIP & Half VDD & Gamma Voltage setting)

Ver. 1.1

9/27

LC420DUG

4

GMA 5

GAMMA VOLTAGE 5

29

GND

Ground

24

EPI5+

EPI Receiver Signal(5+)

49NCNo Connection

Engineering Specification

-LCD Connector (CN1): TF06L-50S-0.5SH (Manufactured by HRS) or Compatible

Table 3-2. MODULE CONNECTOR(CN2) PIN CONFIGURATION

No Symbol Description No Symbol Description

1 GMA 1 GAMMA VOLTAGE 1 (Output From LCD) 26 GND Ground

2 GMA 3 GAMMA VOLTAGE 3 27 EPI1- EPI Receiver Signal(4-)

3 GMA 4 GAMMA VOLTAGE 4 28 EPI1+ EPI Receiver Signal(4+)

5 GMA 7 GAMMA VOLTAGE 7 30 H_VDD Half Driver Power Supply Voltage

6 GMA 9 GAMMA VOLTAGE 9 (Output From LCD) 31 VDD Driver Power Supply Voltage

7 GMA 10 GAMMA VOLTAGE 10 (Output From LCD) 32 VDD Driver Power Supply Voltage

8 GMA 12 GAMMA VOLTAGE 12 33 GND Ground

9 GMA 14 GAMMA VOLTAGE 14 34 VCOM_R VCOM Right Input

10 GMA 15 GAMMA VOLTAGE 15 35 VCOM_R_FB VCOM Right Feed-Back Output

11 GMA 16 GAMMA VOLTAGE 16 36 GIP_Reset GIP Reset

12 GMA 18 GAMMA VOLTAGE 18 (Output From LCD) 37 VST VERTICAL START PULSE

13 GND Ground 38 VGL GATE Low Voltage

14 LOCKOUT6 LOCKOUT6 39 VGH_EVEN GIP Panel VDD for Even GATE TFT

15 LOCKIN3 LOCKIN3 40 VGH_ODD GIP Panel VDD for Odd GATE TFT

16 NC No Connection 41 VGI_P GIP Bi-Scan (Normal =VGH Rotate = VGL)

17 VCC Logic & EPI Power Voltage 42 VGI_N GIP Bi-Scan (Normal =VGL Rotate = VGH)

18 GND Ground 43 GCLK6 GIP GATE Clock 6

19 EPI6- EPI Receiver Signal(6-) 44 GCLK5 GIP GATE Clock 5

20 EPI6+ EPI Receiver Signal(6+) 45 GCLK4 GIP GATE Clock 4

21 GND Ground 46 GCLK3 GIP GATE Clock 3

22 GND Ground 47 GCLK2 GIP GATE Clock 2

23 EPI5- EPI Receiver Signal(5-) 48 GCLK1 GIP GATE Clock 1

25 GND Ground 50 LTD_OUT LTD OUTPUT

Note :

Source Right PCB

Ver. 1.1

1. Please refer to application note for details.

(GIP & Half VDD & Gamma Voltage setting)

CN 2

#1 #50

CN 1

Source Left PCB

#1 #50

10 /27

Engineering Specification

[ CN201 ]

2

N.C

3-2-2. Backlight Module

1) LED Array ass`y Connector (Plug)

: SMH200-07

(black color, manufactured by Yeonho)

2) Mating Connector (Receptacle)

: SMAW200A-H07AA(Dip Type)

20037WR-H07AA(SMD Type)

(black color, manufactured by Yeonho)

Table 5. BACKLIGHT CONNECTOR PIN CONFIGURATION(CN201)

LC420DUG

No Symbol(CN201)

1 Cathode2

3 Anode2

4N.C

5 Cathode1

6N.C

7 Anode1

◆ Rear view of LCM

1 3 5 7
CN201

Description

LED intput Current

Open

LED Output Current

Open

LED intput Current

Open

LED Output Current

LPB

2block

1block

Ver. 1.1

2block

11 /27

3-3. Signal Timing Specifications

EPI Bandwidth

0.588-0.728

GBPS

Table 4. Timing Requirements

Parameter Symbol Condition Min Typ Max Unit Note

LC420DUG

Engineering Specification

Unit Interval

Effective Veye width time

SSC

Receiver off to SOE rising time

SOE pulse width

st

SOE rising to 1

data time

UI

B1&B2

Vspread

tSOE_

Rising

tSOE_

Width

tSOE_

DATA

- 1.37 1.44 1.70 ns

- 0.25 - - UI Fig. 2

@100KHz - - 2 %

5 - - Packet Fig4

- 4 - - Packet Fig.4

- 5 - - Packet Fig.4

-

Ver. 1.1

FIG 4. SOE Width & Timing

12 /27

3-4. Panel Pixel Structure

D1 D2 D3 D4 D5 D1918 D1919 D1920 D1921

G1

G2

G3

G4

G5

G6

LC420DUG

Engineering Specification

G1078

G1079

G1080

FIG. 6 Panel Pixel Structure

Ver. 1.1

13 /27

3-5. Power Sequence

3-5-1. LCD Drivi

it

0V

T

4

Table 9

POWER SEQUENCE

Ta= 25

±

2

C

fV=60Hz

3. Power Off Sequence order is reverse of Power On Condition including Source D

IC

ng circu

Power Supply For LCD
VCC

Power Supply For LCD
VDD, HVDD,VGH, Gamma Ref.
Voltage

0V

Engineering Specification

70%

T2

VGH

90%

LC420DUG

T7

Power Supply For LCD
VGL

GIP Signal For LCD

VGH
even/Odd

50%

100%

T1

T3

VST

GCLK1~6

Power For LED

.

Parameter

1 0.5 - ms

T

2 0.5

T
T

3 0

T

4 10

T5 0-ms

T6 / T6’ 20 - ms 6

T7 2 - sec

Min Typ Max

Value

Note : 1. Power sequence for Source D-IC must follow the Case1 & 2.

※ Please refer to Appendix Ⅲ for more details.

2. VGH Odd signal should be started “High” status and VGH even & odd can not be “High at the
same time.

4. GCLK On/Off Sequence
Normal : GCLK4  GCLK5  GCLK6  GCLK1  GCLK2  GCLK3.
Reverse :GCLK3  GCLK2 GCLK1  GCLK6  GCLK5  GCLK4.

5. VDD_odd/even transition time should be within V_blank

6. In case of T6’, If there is no abnormal display, no problem

T5

T6

-

-

-

..

LED on

..

..

T6’

Unit Notes

ms

ms

ms 2

°

,

-

.

Ver. 1.1

14 /27

LC420DUG

Variati

G to G

6

9

5

[CIE1931]

03

+0.03

right(=0

)r (x axis)

89

Engineering 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 distance 50cm from the LCD surface at a viewing angle of  and  equal to 0 °.

FIG. 8 shows additional information concerning the measurement equipment and method.

Optical Stage(x,y)

LCD Module

FIG. 8 Optical Characteristic Measurement Equipment and Method

Table 10. OPTICAL CHARACTERISTICS

Parameter Symbol

Contrast Ratio CR

Surface Luminance, white L

Luminance Variation 

Response Time

on

Gray to Gray (BW)

WH

WHITE

G to G BW

Pritchard 880 or
equivalent

50cm

Ta= 25±2°C, V

=12.0V, fV=60Hz, Dclk=74.25MHz,

LCD

EXTVBR-B =100%

Value

Unit Note

Min Typ Max

850 1200

2D

5P 1.3 3

σ

240 300

-

-

913

-1

cd/m

ms 4

2

2

Color Coordinates

Color Temperature

Color Gamut

Viewing
Angle

Gray Scale

2D

(CR>10)

Ver. 1.1

RED

GREEN

BLUE

WHITE

°

left (=180°)

up (=90°)

down (=270°)

Rx

Ry

Gx

Gy

Bx

By

Wx

Wy

Typ

-0.

0.649

0.333

0.301

0.590

0.149

0.061

0.281

0.288

Typ

10,000

68

--

l (x axis) 89 - -

u (y axis) 89 - -

d (y axis) 89 - -

-2.2-

K

%

degree 6

7

15 /27

Engineering Specification

Contrast Ratio =

√

N

L79

7.66

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

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. 9.

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

LC420DUG

 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

For more information, see the FIG. 9.

4. Response time is the time required for the display to transit from G(N) to G(M) (Rise Time, Tr
and from G(M) to G(N) (Decay Time, Tr

5. G to G

is Variation of Gray to Gray response time composing a picture

σ

G to G (σ) =

Σ(Xi- u)

N

). For additional information see the FIG. 10. (N<M)

D

2

Xi = Individual Data
u = Data average

: The number of Data

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. 11.

7. Gray scale specification

Gamma Value is approximately 2.2. For more information, see the Table 11.

Table 11. GRAY SCALE SPECIFICATION

Gray Level Luminance [%] (Typ)

L0 0.07

L15 0.27

L31 1.04

L47 2.49

L63 4.68

, L

on4

, L

on5

)

)

R

Ver. 1.1

L95 11.5

L111 16.1

L127 21.6

L143 28.1

L159 35.4

L175 43.7

L191 53.0

L207 63.2

L223 74.5

L239 86.7

L255 100

16 /27

Engineering Specification

@

@

)

y(

)

Gray(

N)0

Gray(

N

)

Measuring point for surface luminance & measuring point for luminance variation.

H

A

③②

LC420DUG

V

①

B

A:H/4mm

④

FIG.9 5 Points for Luminance Measure

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

⑤

TrD

B:V/4mm

H,V : ActiveArea

Ver. 1.1

Optical
Response

10

Gray(M

N,M = Black~White, N<M

FIG. 10 Response Time

17 /27

Engineering Specification

Dimension of viewing angle range



LC420DUG



= 180, Left



= 270, Down

Normal

E



FIG. 11 Viewing Angle

Y



= 90, Up



= 0, Right

Ver. 1.1

18 /27

Engineering Specification

o

930

oota

930

5. Mechanical Characteristics

Table 12 provides general mechanical characteristics.

Table 12. MECHANICAL CHARACTERISTICS

Item Value

Horizontal 955.8 mm

Outline Dimension Vertical 554.4 mm

Depth 35 mm

Horizontal 936.0 mm

Bezel Area

Vertical 530.0 mm

H

rizontal

Active Display Area

Vertical 523.26 mm

LC420DUG

.24 mm

Weight

6.2 Kg (Typ.), 6.6 kg (Max.)

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

Ver. 1.1

19 /27

Engineering Specification

LC420DUG

[ FRONT VIEW ]

Set : Top

Ver. 1.1

Set : Down

20 /27

Engineering Specification

LC420DUG

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Engineering Specification

6. Reliability

Table 13. ENVIRONMENT TEST CONDITION

No. Test Item Condition

LC420DUG

1 High temperature storage test

2 Low temperature storage test

3 High temperature operation test

4 Low temperature operation test

5 Humidity condition Operation

Ta= 60°C 240h

Ta= -20°C 240h

Ta= 50°C 50%RH 240h

Ta= 0°C 240h

Ta= 40 °C ,90%RH

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

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7. International Standards

7-1. LED Array

Safty

a) RoHS, Directive 2002/95/EC of the European Parliament and of the council of 27 January 2003

-

1. Laser (LED Backlight) Information

Class 1M LED Product

IEC60825-1 : 2001

Embedded LED Power (Class 1M)

2. Caution

: LED inside.

Class 1M laser (LEDs) radiation when open.
Do not open while operating.

7-2. Environment

LC420DUG

Engineering Specification

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LC420DUG

Transparent protective plate should have sufficient strength in order to the resist external force

(4)Becareful

for

condensation

at

sudden

temperature

change

Condensation

makes

damage

to

polarizer

or

(if

LCM

)

Engineering Specification

8. Precautions

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

8-1. 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.

.
(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 softmaterials 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

(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.

8-2. 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

.

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.

not, it can causes conductive particles and deal
(9) Please do not set LCD on its edge.
(10) The conductive material and signal cables are kept away from LED driver inductor to prevent abnormal

display, sound noise and temperature rising.

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LC420DUG

(3) Storage condition is guaranteed under packing conditions

This

should

be

peeled

off

slowly

and

carefully

by

people

who

are

electrically

grounded

and

with

well

ion

y

8-7. O

diti

yg y p

Engineering Specification

8-3. 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.

8-4. Precautions for Strong Light Exposure

Strong light exposure causes degradation of polarizer and color filter.

8-5. 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.

.
(4) The phase transition of Liquid Crystal could be recovered if the LCM is released at the normal condition
after the low or over the storage temperature.

8-6. 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.

blown 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.

perating con

(1) The LCD product should be operated under normal conditions. Normal condition is defined as below;

- Temperature : 5 ~ 40 ℃

- Display pattern : continually changing pattern (Not stationary)

(2) If the product will be used in extreme conditions such as high temperature, display patterns or operation

time etc..,
It is strongly recommended to contact LGD for Qualification engineering advice. Otherwise, its reliability
and function ma
Banks, Stock market, and Controlling systems. The LCD product should be applied by global standard

environment. (refer ETSI EN 300, IEC 60721)

not be guaranteed. Extreme conditions are commonly found at Airports, Transit Stations,

on guide

-

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# APPENDIX- I

■ LCM Label

LC420DUG

Engineering Specification

Model

UL, TUV Mark

LGD Logo

LC420DUG
(JF)(R1)

420

Serial No.

Origin

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# APPENDIX- I I

■ LCM Source power sequence

< Source power sequence >

LC420DUG

Engineering Specification

- Input Signal : SOE,POL,GSP,H_CONV,OPT_N

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