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LD420WUN
Product Specification
SPECIFICATION
FOR
APPROVAL
( ) Preliminary Specification
( ) Final Specification
Title 42.0" WUXGA TFT LCD
BUYER General SUPPLIER LG DISPLAY Co., Ltd.
MODEL *MODEL LD420WUN
SUFFIX SAA1 (RoHS verified)
*When you obtain standard approval,
please use the above model name without suffix
SIGNATURE SIGNATURE
APPROVED BY APPROVED BY
DATE DATE
/ Y.S. Park /Senior Manager
REVIEWED BY
/ B.Y. Park / Manager
PREPARED BY
/ J.H.Song / Engineer
Please return 1 copy for your confirmation with PD Product Development Dept.
your signature and comments. LG Display Co., Ltd
Ver. 1.0 1 /32
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Product Specification
CONTENTS
Number ITEM Page
COVER 1
CONTENTS 2
RECORD OF REVISIONS 3
1 GENERAL DESCRIPTION 4
2 ABSOLUTE MAXIMUM RATINGS 5
3 ELECTRICAL SPECIFICATIONS 6
3-1 ELECTRICAL CHARACTERISTICS 6
3-2 INTERFACE CONNECTIONS 8
3-3 SIGNAL TIMING SPECIFICATIONS 10
3-4 SIGNAL TIMING WAVEFORMS 11
3-5 COLOR DATA REFERENCE 12
3-6 POWER SEQUENCE 13
4 OPTICAL SPECIFICATIONS 15
5 MECHANICAL CHARACTERISTICS 19
6 RELIABILITY 22
7 INTERNATIONAL STANDARDS 23
7-1 SAFETY 23
7-2 EMC 23
8 PACKING 24
8-1 DESIGNATION OF LOT MARK 24
8-2 PACKING FORM 24
9 PRECAUTIONS 25
9-1 MOUNTING PRECAUTIONS 25
9-2 OPERATING PRECAUTIONS 25
9-3 ELECTROSTATIC DISCHARGE CONTROL 26
9-4 PRECAUTIONS FOR STRONG LIGHT EXPOSURE 26
9-5 STORAGE 26
9-6 HANDLING PRECAUTIONS FOR PROTECTION FILM 26
9-7 APPROPRIATE CONDITION FOR PUBLIC DISPLAY 26
Ver. 1.0 2 /32
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Product Specification
RECORD OF REVISIONS
Revision No. Revision Date Page Description
1.0 Nov, 24, 2008 - Final Specification
Ver. 1.0 3 /32
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Product Specification
1. General Description
LD420WUN is a Color Active Matrix Liquid Crystal Display with an integral Cold Cathode 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 inch 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 arranged in vertical stripes.
Gray scale or the luminance of the sub-pixel color is determined with a 8bit or 10-bit gray scale signal for
each dot, thus presenting a palette of more than 1.06Billion of colors.
It has been designed to apply the 10-bit 2 port LVDS interface.
It is intended to support Public Display where high brightness, super wide viewing angle, high color gamut,
high color depth and fast moving picture response time are important.
Mini-LVDS(RGB)
EEPROM
Source Driver Circuit
+12.0V SCL SDA S1 S1920
LVDS G1
Gate Driver Circuit
2Port Timing Controller
Bit CN1 [LVDS Rx + DCR + ODC
Selection (51pin)
integrated]
DCR TFT - LCD Panel
Enable (1920 RGB 1080 pixels)
VBR_EXT
VBR_OUT Power Circuit G1080
Block
+24.0V, GND, VBR-A, VBR-B
Status 3PinX1CN(High)
Inverter(14Pin) Back light Assembly
+24.0V, GND 3PinX1CN(High)
General Features
Active Screen Size 42.02 inches(1067.31mm) diagonal
Outline Dimension 983.0(H) x 576.0 (V) x 51.0 mm(D) (Typ.)
Pixel Pitch 0.4845 mm x 0.4845 mm
Pixel Format 1920 horiz. by 1080 vert. Pixels, RGB stripe arrangement
Color Depth 10bit (D) , 1.06Billon colors
Luminance, White 500 cd/m2 (Center 1point ,Typ.)
Viewing Angle (CR>10) Viewing angle free ( R/L 178 (Typ.), U/D 178 (Typ.))
Power Consumption Total 162.6W (Typ.) (Logic = 6.6W, Inverter = 156.0W [VBR-A=1.65V] )
Weight 11.5Kg (Typ.)
Display Mode Transmissive mode, Normally black
Surface Treatment Hard coating(3H), Anti-glare treatment of the front polarizer (Haze 13%)
Possible Display Type Landscape and Portrait Enabled
Ver. 1.0 4 /32
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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 Symbol Unit Remark
Min Max
Power LCM VLCD -0.3 +14.0 VDC at 25 r 2 C
Input
Voltage Backlight inverter VBL -0.3 +27.0 VDC
ON/OFF Control Voltage VON/OFF -0.3 +5. 5 VDC
Brightness Control Voltage VBR 0 +5.0 VDC
Operating Temperature TOP 0 +50 C
Storage Temperature TST -20 +60 C
Note 1,2
Operating Ambient Humidity HOP 10 90 %RH
Storage Humidity HST 10 90 %RH
Notes : 1. Temperature and relative humidity range are shown in the figure below.
Wet bulb temperature should be 39 C Max, and no condensation.
Ver. 1.0 5 /32
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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 Unit Note
Min Typ Max
Circuit :
Power Input Voltage VLCD 11.4 12.0 12.6 VDC
464 546 630 mA 1
Power Input Current ILCD
680 801 920 mA 2
Power Consumption PLCD Watt 1
Rush current IRUSH - - 3 A 3
Notes : 1. The specified current and power consumption are under the VLCD=12.0V, 25 r 2 C, fV=60Hz
condition whereas mosaic pattern(8 x 6) is displayed and fV is the frame frequency.
2. The current is specified at the maximum current pattern.
3. The duration of rush current is about 2ms and rising time of power input is 1ms (min)
White : 1023Gray
Black : 0Gray
Mosaic Pattern(8 x 6)
Ver. 1.0 6 /32
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Table 3. ELECTRICAL CHARACTERISTICS (Continue)
Values
Parameter Symbol Unit Notes
Min Typ Max
Inverter :
Power Supply Input Voltage VBL 22.8 24.0 25.2 Vdc 1
Power Supply Input Voltage Ripple - - 0.5 Vp-p 1
6 6.5 7.2 A VBR-A = 1.65V ... 1
After Aging IBL_A
Power Supply - 7.2 7.7 A VBR-A = 3.3V ... 1
Input Current - A VBR-A = 1.65V ... 2
7.5 8.0
Before Aging IBL_B
- 8.0 8.5 A VBR-A = 3.3V ... 2
VBL = 22.8V
Power Supply Input Current (In-Rush) Irush - - 11 A VBR-B = 3.3V
VBR-A = 1.65V
Power Consumption PBL - 156.0 172.8 W VBR-A = 1.65V ... 1
Brightness Adjust VBR-A 0.0 1.65 3.3 Vdc
Input Voltage for On V on 2.5 - 5.0 Vdc
Control System On/Off
Signals Off V off -0.3 0.0 0.8 Vdc
Brightness Adjust VBR-B 0 - 3.3 V
Lamp:
Discharge Stabilization Time TS 3 min 3
Life Time 50,000 - - Hrs 4
Notes :
1. Electrical characteristics are determined after the unit has been `ON' and stable for approximately 120
minutes at 25 2 C. The specified current and power consumption are under the typical supply Input voltage
24Vand VBR (VBR-A : 1.65V & VBR-B :3.3V), it is total power consumption.
The ripple voltage of the power supply input voltage is under 0.5 Vp-p. LPL recommend Input Voltage is
24.0V 5%.
2. Electrical characteristics are determined within 30 minutes at 25 2 C.
The specified currents are under the typical supply Input voltage 24V.
3. The brightness of the lamp after lighted for 5minutes is defined as 100%.
TS is 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.
4. Specified Values are for a single lamp which is aligned horizontally.
The life time is determined as the time which luminance of the lamp is 50% compared to that of initial value
at the typical lamp current (VBR-A : 1.65V & VBR-B :3.3V), on condition of continuous operating at 25 2 C
5. The duration of rush current is about 10 ms.
6. Brightness Control.
This VBR-B Voltage control brightness.
VBR-B Voltage Function VBR-B Voltage Function
0V Minimum Duty (18%) 3.3V Maximum Duty (100%)
Ver. 1.0 7 /32
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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 14-pin and Slave 12-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
No Symbol Description No Symbol Description
1 GND Ground 27 Bit Selection `L'=8bit,'H'=10bit (D)
2 NC No Connection 28 RE0N SECOND CHANNEL 0-
3 NC No Connection 29 RE0P SECOND CHANNEL 0+
4 NC No Connection 30 RE1N SECOND CHANNEL 1-
5 NC No Connection 31 RE1P SECOND CHANNEL 1+
6 NC No Connection 32 RE2N SECOND CHANNEL 2-
7 LVDS Select `H' =JEIDA , `L' = VESA 33 RE2P SECOND CHANNEL 2+
8 VBR_EXT External VBR 34 GND Ground
9 VBR_OUT VBR output 35 RECLKN SECOND CLOCK CHANNEL C-
10 DCR_Enable `H' = Enable , `L' = Disable 36 RECLKP SECOND CLOCK CHANNEL C+
11 GND Ground 37 GND Ground
12 RO0N FIRST CHANNEL 0- 38 RE3N SECOND CHANNEL 3-
13 RO0P FIRST CHANNEL 0+ 39 RE3P SECOND CHANNEL 3+
14 RO1N FIRST CHANNEL 1- 40 RE4N SECOND CHANNEL 4- (For 10bit D)
15 RO1P FIRST CHANNEL 1+ 41 RE4P SECOND CHANNEL 4+ (For 10bit D)
16 RO2N FIRST CHANNEL 2- 42 Reserved No connection or GND
17 RO2P FIRST CHANNEL 2+ 43 Reserved No connection or GND
18 GND Ground 44 GND Ground
19 ROCLKN FIRST CLOCK CHANNEL C- 45 GND Ground
20 ROCLKP FIRST CLOCK CHANNEL C+ 46 GND Ground
21 GND Ground 47 NC No connection
22 RO3N FIRST CHANNEL 3- 48 VLCD Power Supply +12.0V
23 RO3P FIRST CHANNEL 3+ 49 VLCD Power Supply +12.0V
24 RO4N FIRST CHANNEL 4- (For 10bit D) 50 VLCD Power Supply +12.0V
25 RO4P FIRST CHANNEL 4+ (For 10bit D) 51 VLCD Power Supply +12.0V
26 Reserved No connection or GND - - -
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 8 /32
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3-2-2. Backlight Inverter
Inverter Connector : S14B-PH-SMC
(manufactured by JST) or Equivalent
- Mating Connector : PHR-14 or Equivalent
Table 5. INVERTER CONNECTOR PIN CONFIGULATION
Pin No Symbol Description Inv. Note
1 VBL Power Supply +24.0V VBL
2 VBL Power Supply +24.0V VBL
3 VBL Power Supply +24.0V VBL
4 VBL Power Supply +24.0V VBL
5 VBL Power Supply +24.0V VBL
6 GND Backlight Ground GND
7 GND Backlight Ground GND
8 GND Backlight Ground GND 1
9 GND Backlight Ground GND
10 GND Backlight Ground GND
Analog dimming voltage
11 VBR-A
DC 0.0V ~ 3.3V (Typ : 1.65V)
VBR-A 2, 3
12 VON/OFF 0.0V ~ 5.0V On/Off
Burst dimming voltage
13 VBR-B VBR-B 3
DC 0.0V ~ 3.3V
Normal : Upper 3.0V
14 Status Status 4
Abnormal : Under 0.7V
Notes : 1. GND should be connected to the LCD module's metal frame.
2. If Pin #11 is open, VBR-A = 1.65V. When apply over 1.65V( ~ 3.3V) continuously,
its luminance is increasing however lamp's life time is decreasing.
It could be usable for boost up luminance when using DCR (=Dynamic contrast ratio) function only.
3. Minimum Brightness : VBR-B =0V Maximum Brightness : VBR-B = 3.3V
4. Even though Pin #14 is open, there is no effect on inverter operating, The output terminal of inverter..
5. Each impedance of pin #11,12 and 13 is 240[ ], 80[ ], 160[ ]
Rear view of LCM
14
...
1
Ver. 1.0 9 /32
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3-3. Signal Timing Specifications
Table 6 shows the signal timing required at the input of the LVDS transmitter. All of the interface signal timing
should be satisfied with the following specification for normal operation.
Table 6. TIMING TABLE for NTSC (DE Only Mode)
ITEM Symbol Min Typ Max Unit Note
Display Period tHV - 960 - tclk
Horizontal Blank tHB 100 140 240 tclk
Total tHP 1060 1100 1200 tclk 2200/2
Display Period tVV - 1080 - Lines
Vertical Blank tVB 11 45 69 Lines
Total tVP 1091 1125 1149 Lines
ITEM Symbol Min Typ Max Unit Note
DCLK fCLK 70 74.25 77 MHz 148.5/2
Frequency Horizontal fH 65 67.5 70 KHz
Vertical fV 57 60 63 Hz
Table 7 shows the signal timing required at the input of the LVDS transmitter. All of the interface signal timing
should be satisfied with the following specification for normal operation.
Table 7. TIMING TABLE for PAL (DE Only Mode)
ITEM Symbol Min Typ Max Unit Note
Display Period tHV - 960 - tclk
Horizontal Blank tHB 100 140 240 tclk
Total tHP 1060 1100 1200 tclk 2200/2
Display Period tVV - 1080 - Lines
Vertical Blank tVB 228 270 300 Lines
Total tVP 1308 1350 1380 Lines
ITEM Symbol Min Typ Max Unit Note
DCLK fCLK 70 74.25 77 MHz 148.5/2
Frequency Horizontal fH 65 67.5 70 KHz
Vertical fV 47 50 53 Hz
Note : The Input of HSYNC & VSYNC signal does not have an effect on normal operation(DE Only Mode).
The performance of the electro-optical characteristics may be influenced by variance of the vertical refresh rate.
Ver. 1.0 10 /32
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3-4. Signal Timing Waveforms
0.7VDD
DE, Data
0.3VDD
tCLK
DCLK 0.5 VDD
Valid data
First data Invalid data Pixel 0,0 Pixel 2,0 Invalid data
Valid data
Second data Invalid data Pixel 1,0 Pixel 3,0 Invalid data
DE(Data Enable)
* tHB = tHFP + tWH +tHBP
* Reference : Sync. Relation
* tVB = tVFP + tWV +tVBP
tHP
HSync tWH
tHBP tHV tHFP
DE(Data Enable)
tVP
tWV
VSync
tVBP tVV tVFP
DE(Data Enable)
Ver. 1.0 11 /32
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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 8 provides a reference for color versus data input.
Table 8. COLOR DATA REFERENCE
Ver. 1.0 12 /32
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3-6. Power Sequence
3-6-1. LCD Driving circuit
90% 90%
Power Supply For LCD
VLCD 10% 10%
0V
T1 T2 T5 T6
Valid Data
Interface Signal (Tx)
T3 T4
T7 T8
Option Signal
(LVDS_select, DCR_Enable, BIT_select)
Lamp ON
Table 9. POWER SEQUENCE
Value
Parameter Unit Notes
Min Typ Max
T1 0.5 - 20 ms
T2 0 - - ms 3,5
T3 200 - - ms 4
T4 200 - - ms 4
T5 0 - - ms 3,5
T6 2.0 - - s 2,6
T7 0 - T2 ms 5
T8 0 - - ms 5
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 VLCD to 0V.
3. The case when the T2/T5 exceed 3x(1/fv), it operates protection pattern (Black pattern) till valid
signal inputted. There is no reliability problem. (ex. 60Hz : 3x(1/60Hz) = 50ms)
4. 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.
5. If the on time of signals(Interface signal and Option signals) precedes the on time of Power(V LCD),
check the LCD logic Power(Vcc) is under 0.8V, otherwise it will be happened abnormal display.
6. T6 should be measured after the Module has been fully discharged between power off and on
period.
Ver. 1.0 13 /32
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3-6-2. Sequence for Inverter
Power Supply For Inverter
24V (typ.)
90%
VBL
10% 0.7V
0V
T1 T2 1000ms (Min) T5 T3 T2 1000ms (Min)
VON/OFF
T4 T4
VBR-A & Lamp ON
VBR-B
T7
3-6-3. Deep condition for Inverter
T6
VBL : 24V
VBL(Typ.) x 0.8
0V
Table 12. Power Sequence for Inverter
Values
Parameter Units Remarks
Min Typ Max
T1 20 - - ms 1
T2 500 - - ms
T3 200 - - ms
T4 0 - ms 2
T5 10 - - ms
T6 - - 10 ms VBL(Typ) x 0.8
T7 1000 - - ms 3
Notes : 1. T1 describes rising time of 0V to 24V and this parameter does not applied at restarting time.
2. T4(max) is less than T2.
3. In T7 section, VBR-B is 3.3V and VBR-A is 1.65V.
Ver. 1.0 14 /32
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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 specified are at an approximate distance 50cm from the LCD surface at a viewing angle of ) and T
equal to 0 .
FIG. 1 shows additional information concerning the measurement equipment and method.
LCD Module Pritchard 880 or
Optical Stage(x,y)
equivalent
50cm
FIG. 1 Optical Characteristic Measurement Equipment and Method
Table 11. OPTICAL CHARACTERISTICS
Ta= 25 2 C, VLCD=12.0V, fV=60Hz, Dclk=148.5MHz VBR_A=1.65V, VBR_B=3.3V
Value
Parameter Symbol Unit Note
Min Typ Max
Contrast Ratio CR 700 1000 - 1
Surface Luminance, white LWH 400 500 - cd/m2 2
Luminance Variation G WHITE 5P - - 1.3 3
Response Time Gray-to-Gray G to G - 9 14 ms 4,5
Rx
RED
Ry
Gx
GREEN
Color Coordinates Gy Typ Typ
[CIE1931] Bx -0.03 +0.03
BLUE
By
Wx
WHITE
Wy
Viewing Angle (CR>10)
x axis, right(I=0 ) Tr 89 - -
x axis, left (I=180 ) Tl 89 - -
degree 6
y axis, up (I=90 ) Tu 89 - -
y axis, down (I=270 ) Td 89 - -
Gray Scale - - - 7
Ver. 1.0 15 /32
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Notes :1. Contrast Ratio(CR) is defined mathematically as :
CR(Contrast Ratio) = Maximum CRn (n=1, 2, 3, 4, 5)
Surface Luminance at position n with all white pixels
CRn =
Surface Luminance at position n with all black pixels
n = the Position number(1, 2, 3, 4, 5). For more information, see FIG 2.
2. Surface luminance are determined after the unit has been `ON' and 60min 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 , G WHITE is defined as :
G WHITE(5P) = Maximum(Lon1,Lon2, Lon3, Lon4, Lon5) / Minimum(Lon1,Lon2, Lon3, Lon4, Lon5)
Where Lon1 to Lon5 are the luminance with all pixels displaying white at 5 locations .
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
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6. Reliability
Table 14. ENVIRONMENT TEST CONDITION
No. Test Item Condition
1 High temperature storage test Ta= 60 C 240h
2 Low temperature storage test Ta= -20 C 240h
3 High temperature operation test Ta= 50 C 50%RH 240h
4 Low temperature operation test Ta= 0 C 240h
Wave form : random
Vibration level : 1.0Grms
Vibration test
5 Bandwidth : 10-300Hz
(non-operating)
Duration : X,Y,Z, 30 min
One time each direction
Shock level : 50G
Shock test Waveform : half sine wave, 11ms
6
(non-operating) Direction : X, Y, Z
One time each direction
7 Humidity condition Operation Ta= 40 C ,90%RH
Altitude operating 0 - 15,000 ft
8
storage / shipment 0 - 40,000 ft
Note : Before and after Reliability test, LCM should be operated with normal function.
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7. International Standards
7-1. Safety
a) UL 60950-1:2003, First Edition, Underwriters Laboratories, Inc.,
Standard for Safety of Information Technology Equipment.
b) CAN/CSA C22.2, No. 60950-1-03 1st Ed. April 1, 2003, Canadian Standards Association,
Standard for Safety of Information Technology Equipment.
c) EN 60950-1:2001, First Edition,
European Committee for Electrotechnical Standardization(CENELEC)
European Standard for Safety of Information Technology Equipment.
d) IEC 60950-1:2001, First Edition, The International Electrotechnical Commission (IEC)
Standard for Safety of Information Technology Equipment.
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 23 /32
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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 : PANEL CODE G : FACTORY CODE
H : ASSEMBLY CODE I,J,K,L,M : SERIAL NO.
Note
1. YEAR
Year 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010
Mark 1 2 3 4 5 6 7 8 9 0
2. MONTH
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mark 1 2 4 4 5 6 7 8 9 A B C
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.
8-2. Packing Form
a) Package quantity in one Pallet : 12 pcs
b) Pallet Size : 1140 mm X 990 mm X 810 mm.
Ver. 1.0 24 /32
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LD420WUN
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. *
(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 can causes conductive particles 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 co ◦ Jabse Service Manual Search 2026 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo