The LC420WU2 is a Color Active Matrix Liquid Crystal Display with an integral Cold Cathode Fluorescent
Lamp(CCFL) 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 42.02 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 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 16.7M(true) colors.
It has been designed to apply the 8-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.
Total 167.3 W (Typ.) (Logic=7.3 W, Inverter=160W [IBL=6.0 mA] ) Power Consumption
13.0K g (Typ.) Weight
Transmissive mode, Normally blackDisplay Mode
Hard coating(3H), Anti-glare treatment of the front polarizer (Haze 13%)Surface Treatment
Ver. 0.1Dec. 11. 2006
4 /28
LC420WU2
Liquid Crystal Display
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
ParameterRemark
Symbol
Unit
MaxMin
Power Input
Voltage
LCM
Backlight inverter
Brightness Control Voltage
Operating Temperature
Storage Temperature
Operating Ambient Humidity
Storage Humidity
LCD
BL
Br
OP
ST
OP
ST
+14.0-0.3V
+28.0+21.6V
+5.25-0.3VON/OFFON/OFF Control Voltage
+5.00V
+500T
+50-20T
DC
V
DC
V
DC
V
DC
C
%RH9010H
%RH9010H
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.
at 25 ± 2 CV
C
Note 1
Ver. 0.1Dec. 11. 2006
5 /28
LC420WU2
Liquid Crystal Display
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 CCFL
backlight and inverter circuit.
Table 2. ELECTRICAL CHARACTERISTICS
Value
ParameterSymbol
Circuit :
Power Input Voltage
LCD
MaxTypMin
V
12.612.011.4V
DC
NoteUnit
I
Power Input Current
Power Consumption
Rush current
LCD
LCD
RUSH
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 1ms (min.).
White : 255Gray
Black : 0Gray
=12.0V, 25 ± 2C, fV=60Hz
LCD
1mA793610-
2mA1066820-
1Watt9.57.3-P
3A3.0--I
Mosaic Pattern(8 x 6)
Ver. 0.1Dec. 11. 2006
6 /28
Product Specification
Table 3. ELECTRICAL CHARACTERISTICS (Continued)
ParameterSymbol
Inverter :
IBLPower Supply Input Current
Input Voltage for
Control System
Signals
On/Off
Pulse Duty(PWM)
(Burst mode)
Lamp Current (ExtVbr-B = 100%)
Life Time
Audible Noise
OnVdc5.0-2.5V on
Off
I
O-MAX
I
O-TYP
I
O-MIN
2.5V
0.0
50,000Boost =1.65V
40,000Boost = 3.3V
Values
MaxTypMin
245
5.0-High Level
0.6-Low Level
24Peak Level
27Overall Level
LC420WU2
Liquid Crystal Display
NotesUnit
Vdc26.224.022.8VBLPower Supply Input Voltage
Vdc28Unloading Input Voltage
ExtVbr-B = 100%
A7.36.7-
A8.57.9-
A13--IrushPower Supply Input Current(In-Rush)
W175160-PBLPower Consumption
Vdc0.80.0-0.3V off
%10020EXTVbr-BBrightness Adj(Burst mode)
DC
V
DC
Boost = 1.65V
ExtVbr-B = 100%
Boost = 3.3V
VBL = 22.8V
EXTVbr-B=100%
Boost = 1.65V
Boost = TypV(rms)760610480VoutLamp Voltage (ExtVbr-B = 100%)
Boost = MaxmA(rms)7.57.06.5
Boost = TYPmA(rms)6.56.05.5
Boost = MinmA(rms)5.55.04.5
Appendix DdB (A)
1
1Vp-p0.2-0.2Power Supply Input Voltage Ripple
1
1
5
1
2Vdc3.3-0.0VBRBrightness Adjust
3Hz145NTSC/PALPWM Frequency for NTSC & PAL
4Hrs
Notes :
1. Electrical characteristics are determined after the unit has been ‘ON’ and stable for approximately 120
minutes at 252C. The specified current and power consumption are under the typical supply Input voltage
24V and Vbr 1.65V, it is total power consumption.
The ripple voltage of the power supply input voltage is under 0.4 Vp-p. LPL recommend Input Voltage is
24.0V 5%.
2.
Brightness Control. This VBRVoltage control brightness.
FunctionVBR Voltage
Maximum Brightness (110%)3.3V
Minimum Brightness (90%)0V
3.
LPL recommend that the PWM freq. is
synchronized with the treble harmonic of Vsync signal of system.
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/ maximum lamp current ( Boost = 1.65V / 3.3V) on condition of continuous operating at 25 ± 2C
5. The duration of rush current is about 10ms.
Ver. 0.1Dec. 11. 2006
7 /28
LC420WU2
Liquid Crystal Display
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 two 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
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
Reserved(NC)
Reserved (NC)
Reserved (NC)
Reserved (NC)
Reserved (NC)
Reserved (NC)
Reserved (NC)
Reserved (NC)
Reserved (NC)
Reserved (NC)
GND
RO0N
RO0P
RO1N
RO1P
RO2N
RO2N
GND
ROCLKN
ROCLKP
GND
RO3N
RO3P
Reserved (NC)
Reserved (NC)
GND
DescriptionSymbolNo
No connection
No connection(Reserved for I2C)
No connection(Reserved for I2C)
No connection
No connection
No connection
No connection
No connection
No connection
No connection
Ground
FIRST CHANNEL 0-
FIRST 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+
No connection(Res for 10Bits)
No connection(Res for 10Bits)
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
GND
RE0N
RE0P
RE1N
RE1P
RE2N
RE2P
GND
RECLKN
RECLKP
GND
RE3N
RE3P
Reserved (NC)
Reserved (NC)
GND
GND
GND
GND
GND
NC
V
LCD
V
LCD
V
LCD
V
LCD
-
SECOND CHANNEL 0-
SECOND CHANNEL 0+
SECOND CHANNEL 1-
SECOND CHANNEL 1+
SECOND CHANNEL 2-
SECOND CHANNEL 2+
Ground
SECOND CLOCK CHANNEL C-
SECOND CLOCK CHANNEL C+
Ground
SECOND CHANNEL 3-
SECOND CHANNEL 3+
No connection(Res for 10Bits)
No connection(Res for 10Bits)
Ground
Ground
Ground
NC
Power Supply +12.0V
Power Supply +12.0V
Power Supply +12.0V
Power Supply +12.0V
Note :
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.
4. Pin#13 can be opened. ( if Pin #13 is open , EXTVBR-B is 100% )
5. Pin#14 can be opened. (Even though Pin #14 is GND or no connection, there is no effect on inverter operating)
6.
Each impedance of pin #11, 12 and 13 is 33
[M]
, 37
[K]
and 596
PCB
14
…
…
1
<Master>
Ver. 0.1Dec. 11. 2006
…
[K].
1
12
<Slave>
-GNDPOWER GNDGND
5
PCB
…
11 /28
LC420WU2
Liquid Crystal Display
Product Specification
3-3. Signal Timing Specifications
Table 8 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 8. TIMING TABLE for NTSC & PAL
Period
DCLK
Period
Horizontal Valid
Horizontal Blank
Hsync
Frequency
Width
Horizontal Back Porch
Horizontal Front Porch
CLK
HP
HV
-
H
WH
HBP
HFP
HP-tHV
[ DE (Data Enable) Only ]
NoteUnitMaxTypMinSymbolITEM
ns16.7713.4712.98t
MHz7774.2559.63-Frequency
t
130011001060t
960960960t
t
140t
HP-tHV
68.967.555.25f
-22-t
CLK
t
CLK
KHz
t
CLK
-8812t
-3014t
=148.5/2
t
t
t
Hz636047f
t
Hz-256t
t
HP
HP
HP
HP
HP
Note 1)
PAL : 47~53Hz
NTSC : 57~63Hz
Vsync
Period
Vertical Valid
Frequency
Width
Vertical Back Porch
Vertical Front Porch
VP
VV
-Vertical Blank
V
WV
VBP
VFP
VP-tVV
114911251091t
1080-t
t
45t
VP-tVV
-12-t
-83t
Note: 1. The performance of the electro-optical characteristics may be influenced by variance of the vertical
refresh rate.
2. Above Timing Tables are only valid for DE Mode.
Ver. 0.1Dec. 11. 2006
12 /28
3-4. Signal Timing Waveforms
LC420WU2
Liquid Crystal Display
Product Specification
DCLK
First data
Second data
t
CLK
0.5 VDD
Invalid data
Invalid data
DE(Data Enable)
DE, Data
Pixel 0,0
Pixel 1,0
0.7VDD
Valid data
Pixel 2,0
Valid data
Pixel 3,0
0.3VDD
Invalid data
Invalid data
DE(Data Enable)
t
HV
t
HT
11080
t
VV
t
VT
Ver. 0.1Dec. 11. 2006
13 /28
LC420WU2
Liquid Crystal Display
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 9 provides a reference for color versus data input.
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 case when the T2/T5 exceed maximum specification, it operates protection
pattern(Black pattern) till valid signal inputted. There is no reliability problem.
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 option signal(DISM or AI_Enable) precedes the on time of Power(VLCD),check the LCD logic
Power(Vcc) is under 0.8V, otherwise it will be happened abnormal display.
6. Flicker would come out when power on-off(T7=under 1s) is continuously tested over several ten-times
Ver. 0.1Dec. 11. 2006
LCD
ms0 < T8 < T2T8
ms0 < T9 < T5T9
to 0V.
15 /28
3-6-2. Sequence for Inverter
LC420WU2
Liquid Crystal Display
Product Specification
Power Supply For Inverter
V
BL
10%
0V
V
ON/OFF
Boost
EXTV
BR-B
: 1. Lamp ON at PWM Rising Edge and Lamp OFF at PWM Falling Edge.
2. EXTVBR-B has Same sequence with Boost
3-6-3. Deep condition for Inverter
24V (typ.)
90%
0.7V
T1T2T3T2
1000ms (Min)1000ms (Min)
T4
T5
Lamp ON
T7
T4
T6
V
BL
VBL(Typ.) x 0.85
0 V
Table 11. Power Sequence for Inverter
Parameter
Values
MaxTypMin
-
Units
ms--20T1
ms--500T2
ms--200T3
ms--10T5
VBL(Typ) x 0.85ms10--T6
Notes : 1. T1 describes rising time of 0V to 24V and is not applied at restarting time.
2. T4(max) is less than T2.
3. In T7 section, EXTV
BR-B
should be duty 100%.
4. When VBL[24V] is supplied always, there is no reliability problem.
: 24V
Remarks
1
2ms0T4
3ms--1000T7
Ver. 0.1Dec. 11. 2006
16 /28
LC420WU2
Liquid Crystal Display
Product Specification
4. Optical Specification
Optical characteristics are determined after the unit has been ‘ON’ and stable for approximately 2 Hrs in a dark
environment at 252C. The specified optical values are measured at an approximate 50cm distance from the
LCD surface on condition that viewing angle of Φ and θ equal to 0 .
FIG. 1 shows additional information concerning the measurement equipment and method.
Optical Stage(x,y)
LCD Module
FIG. 1 Optical Characteristic Measurement Equipment and Method
Table 12. OPTICAL CHARACTERISTICS
SymbolParameter
Contrast Ratio
Surface Luminance, white
Luminance Variation
Response Time
(Gray-to-Gray)
Gray-to-Gray
Rise + decay
RED
GREEN
Color Coordinates
[CIE1931]
BLUE
WHITE
WH
WHITE
BLACK
R +
Rx
Ry
Gx
Gy
Bx
By
Wx
Wy
Tr
Pritchard 880 or
equivalent
50cm
Ta= 25
2
C
, V
=12.0V, fV=60Hz, Dclk=148.5MHz VBR=1.65V
LCD
Value
NoteUnit
MaxTypMin
-800600CR
-550400L
2
1.6--5Pδ
5P
D
1.7--δ
168-G to G
3218-Tr
ms
0.638
0.340
0.279
Typ
-0.03
0.611
0.146
Typ
+0.03
0.062
0.285
0.293
1
2cd/m
3
4
Viewing Angle (CR>10)
x axis, right(φ=0)
x axis, left (φ=180)
y axis, up (φ=90)
y axis, down (φ=270)
Ver. 0.1Dec. 11. 2006
2.2
-8985θr
-8985θl
-8985θu
5degree
-8985θd
6Gray Scale
17 /28
Note :
LC420WU2
Liquid Crystal Display
Product Specification
1. Contrast Ratio(CR) is defined mathematically as :
Contrast Ratio =
Surface Luminance with all white pixels
Surface Luminance with all black pixels
Measure Position : Center 1-point
2. Surface Luminance(
L
) is the luminance value measured at an approximate 50cm distance from
WH
the center 1-point of LCD surface as all pixels displaying white. See FIG. 2 for more information.
3. The variation of surface luminance , δ WHITE and δ BLACK are defined as :
δ WHITE(5P) = Maximum(L
δ BLACK(5P) = Maximum(L
Where L
on1
to L
are the luminance with all pixels displaying white at 5 locations .
on5
on1,Lon2
on1,Lon2
, L
, L
on3
on3
, L
, L
on4
on4
, L
) / Minimum(L
on5
, L
) / Minimum(L
on5
on1,Lon2
on1,Lon2
, L
, L
on3
on3
, L
, L
on4
on4
, L
, L
on5
on5
)
)
For more information, see the FIG. 2.
4. Response time is defined as the required time for the 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)
5. 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.
6. Gray scale specification
Gamma Value is approximately 2.2. For more information, see the Table 13.
Table 13. GRAY SCALE SPECIFICATION
Gray Level
L0
L15
L31
L47
L63
L79
L95
L111
L127
L143
L159
L175
L191
L207
L223
L239
L255
Luminance [%] (Typ.)
0.19
0.39
1.16
2.61
4.80
7.77
11.6
16.2
21.7
28.2
35.5
43.8
53.0
63.3
74.5
86.7
100
Ver. 0.1Dec. 11. 2006
18 /28
Product Specification
Measuring point for surface luminance & measuring point for luminance variation.
LC420WU2
Liquid Crystal Display
A : H / 4 mm
FIG. 2 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)”.
T
r
R
100
90
T
r
D
B : V / 4 mm
H : 930.24 mm
V : 523.26 mm
@ H,V : Active Area
Optical
Response
10
0
Ver. 0.1Dec. 11. 2006
Gray(N)
N,M = 0(Black)~255(White), N<M
FIG. 3 Response Time
Gray(M)
Gray(N)
19 /28
Dimension of viewing angle range
φ
= 180°, Left
Product Specification
Normal
E
θ
φ
Y
φ
= 90°, Up
φ
= 0°, Right
LC420WU2
Liquid Crystal Display
φ
= 270°, Down
FIG. 4 Viewing Angle
Ver. 0.1Dec. 11. 2006
20 /28
LC420WU2
Liquid Crystal Display
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 14. MECHANICAL CHARACTERISTICS
ValueItem
983.0 mmHorizontal
Outline Dimension
Bezel Area
Active Display Area
Surface Treatment
13.0Kg (Typ.), 14.0Kg (Max.)Weight
Hard coating(3H)
Anti-glare treatment of the front polarizer (Haze 13%)
576.0 mmVertical
51.0 mmDepth
939.0 mmHorizontal
531.0 mmVertical
930.24 mmHorizontal
523.26 mmVertical
Note : 1.Please refer to a mechanic drawing in terms of tolerance at the next page.
Ver. 0.1Dec. 11. 2006
21 /28
LC420WU2
Liquid Crystal Display
Product Specification
Ver. 0.1Dec. 11. 2006
22 /28
LC420WU2
Liquid Crystal Display
Product Specification
Ver. 0.1Dec. 11. 2006
23 /28
Product Specification
6. Reliability
Table 15. ENVIRONMENT TEST CONDITION
5
Vibration test
(operating)
LC420WU2
Liquid Crystal Display
ConditionTest ItemNo.
Ta= 50C 240hHigh temperature storage test1
Ta= -20C 240hLow temperature storage test2
Ta= 50C 50%RH 240hHigh temperature operation test3
Ta= 0C 240hLow temperature operation test4
Wave form : random
Vibration level : 1.0Grms
Bandwidth : 10-300Hz
Duration : X,Y,Z, 30 min
One time each direction
Shock level : 50Grms
6
8
Shock test
(operating)
Altitude operating
storage / shipment
Waveform : half sine wave, 11ms
Direction :X, Y, Z
One time each direction
Ta= 40 C ,90%RHHumidity condition Operation7
0 - 14,000 feet(4267.2m)
0 - 40,000 feet(12192m)
Ver. 0.1Dec. 11. 2006
24 /28
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..
7-2. EMC
LC420WU2
Liquid Crystal Display
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) CISPR22 “Limits and Methods of Measurement of Radio Interface Characteristics of Information
Technology Equipment.“ International Special Committee on Radio Interference.
c) EN 55022 “Limits and Methods of Measurement of Radio Interface Characteristics of Information
Technology Equipment.“ European Committee for Electrotechnical Standardization.(CENELEC), 1998
( Including A1: 2000 )
Ver. 0.1Dec. 11. 2006
25 /28
8. Packing
8-1. Designation of Lot Mark
a) Lot Mark
ABCDEFGHIJKLM
A,B,C : SIZE(INCH)
D : YEAR E : MONTH
F : PANEL CODEG : FACTORY CODE
H : ASSEMBLY CODE I,J,K,L,M : SERIAL NO.
Note
1. YEAR
LC420WU2
Liquid Crystal Display
Product Specification
Year
Mark
200012001
0
2002320034200452005
2
2. MONTH
Month
Mark
Apr5May
4
Jun
6
Jul
7
Aug9Sep
8
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.
2006
6
Oct
A
2007999897
Nov
7987
DecMarFebJan
B
C421
8-2. Packing Form
a) Package quantity in one Pallet : 12 pcs
b) Pallet Size : 1150
Ver. 0.1Dec. 11. 2006
26 /28
LC420WU2
Liquid Crystal Display
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 holes arranged in four corners or four sides.
(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 causes metallic foreign material and deal LCM a fatal blow)
(9) Please do not set LCD on its edge.
Ver. 0.1Dec. 11. 2006
27 /28
LC420WU2
Liquid Crystal Display
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 5C and 35C 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. 0.1Dec. 11. 2006
28 /28
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