(●) Preliminary Specification
( ) Final Specification
LM270WQ1
Liquid Crystal Display
Product Specification
SPECIFICATION
FOR
APPROVAL
27.0” QHD TFT LCDTitle
BUYER
MODEL
APPROVED BY
/
/
/
General
SIGNATURE
DATE
SUPPLIER LG Display Co., Ltd.
*MODEL LM270WQ1
SUFFIX SDFJ
*When you obtain standard approval,
please use the above model name without suffix
APPROVED BY
S Y Park / G.Manager
REVIEWED BY
S J So / Manager
PREPARED BY
S R Yoo / Engineer
SIGNATURE
DATE
Please return 1 copy for your confirmation with
your signature and comments.
Ver. 0.0 DEC. 12. 2012
MNT Products Engineering Dept.
LG Display Co., Ltd.
1/ 29
Product Specification
Contents
LM270WQ1
Liquid Crystal Display
No ITEM
COVER
CONTENTS
RECORD OF REVISIONS
1 GENERAL DESCRIPTION
2 ABSOLUTE MAXIMUM RATINGS
3 ELECTRICAL SPECIFICATIONS
3-1 ELECTRICAL CHARACTREISTICS
3-2 INTERFACE CONNECTIONS
3-3 SIGNAL TIMING SPECIFICATIONS
3-4 SIGNAL TIMING WAVEFORMS
3-5 COLOR INPUT DATA REFERNECE
3-6 POWER SEQUENCE
4 OPTICAL SFECIFICATIONS
5 MECHANICAL CHARACTERISTICS
6 RELIABLITY
Page
1
2
3
4
5
6
6
8
11
12
13
14
16
22
25
7 INTERNATIONAL STANDARDS
7-1 SAFETY
7-2 EMC
ENVIRONMENT7-3
8PACKING
8-1 DESIGNATION OF LOT MARK
8-2 PACKING FORM
9 PRECAUTIONS
9-1 MOUNTING PRECAUTIONS
9-2 OPERATING PRECAUTIONS
9-3 ELECTROSTATIC DISCHARGE CONTROL
9-4 PRECAUTIONS FOR STRONG LIGHT EXPOSURE
9-5 STORAGE
9-6 HANDLING PRECAUTIONS FOR PROTECTION FILM
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Product Specification
RECORD OF REVISIONS
LM270WQ1
Liquid Crystal Display
Revision
No
0.0 Dec. 17. 2012 - First Draft (Preliminary)
Revision Date Page Description
Ver. 0.0 DEC. 12. 2012
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LM270WQ1
Liquid Crystal Display
Product Specification
1. General Description
LM270WQ1 is a Color Active Matrix Liquid Crystal Display with Light Emitting Diode ( White LED) backlight
system without LED driver. 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 27inch diagonally measured
active display area with QHD resolution (2560 vertical by 1440 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 brightness of the sub-pixel color is determined with a 10-bit gray scale signal for each dot,
thus, presenting a palette of more than 1.07B colors with FRC (Frame Rate Control).
It has been designed to apply the 10-bit 4Lane Display port interface.
It is intended to support displays where high brightness, super wide viewing angle,
high color saturation, and high color are important.
Mini-LVDS (RGB)
G1
Gate Driver Circuit
G1440
Source Driver Circuit
S1 S2560
TFT - LCD Panel
(2560 × RGB × 1440 pixels)
Main Link
4 Lane
AUX CH
HPD
LCD Power
12 V
CN1
(40pin)
Flash
memory
SPI
Logic Power
3.3V / 1.2V
EEPROM
(EDID)
I2C
Timing
Controller
Power
Enable
(Video On)
Power Circuit
Block
General Features
Active Screen Size 27.0 inches(68.47cm) diagonal
Outline Dimension (W/O COF) 609.44(H) x 350.46(V) x 1.75(D) mm(Typ.)
Pixel Pitch 0.2331 mm x 0.2331 mm
Pixel Format 2560 horiz. By 1440 vert. Pixels RGB stripes arrangement
Color Depth 8-bit, 16,777,216 colors
Luminance, White 440 cd/m
2
( Center 1 point, Typ.)
Viewing Angle (CR>10) View Angle Free (R/L 178(Typ.), U/D 178(Typ.))
Power Consumption 22.62 Watt @V
LCD
Weight 920g (typ.)
Display Operating Mode Transmissive mode, normally black
Surface Treatment Glare (Low Reflection treatment of the front polarizer)
HDCP HDCP key implemented in Tcon (DP628)
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LM270WQ1
Liquid Crystal Display
Product Specification
2. Absolute Maximum Ratings
The following are maximum values which, if exceeded, may cause faulty operation or damage to the unit.
Table 1. ABSOLUTE MAXIMUM RATINGS
Parameter Symbol
Power Input Voltage
Operating Temperature
Storage Temperature
Operating Ambient Humidity
Storage Humidity
VLCD -0.3 14 Vdc
TOP 0 50 °C
TST -20 60 °C
HOP 10 90 %RH
HST 10 90 %RH
Values
Units Notes
Min Max
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. Storage condition is guaranteed under packing condition (with Al-Bag).
90%
60
60%
40
50
40%
Humidity [(%)RH]
10%
Wet Bulb
Temperature [C]
30
20
10
0
at 25 ± 2°C
1, 2
Storage
Operation
10 20 30 40 50 60 70 800-20
Dry Bulb Temperature [C]
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LM270WQ1
Liquid Crystal Display
Product Specification
3. Electrical Specifications
3-1. Electrical Characteristics
It requires two power inputs. One is employed to power the LCD electronics and to drive the TFT array and
liquid crystal. The second input power for the DP Rx.
Table 2-1-1. ELECTRICAL CHARACTERISTICS (Normal Mode)
Values
Parameter Symbol
Min Typ Max
MODULE :
Power Supply Input voltage VLCD 11.6 12.0 12.4 Vdc
Permissive Power Input Ripple VdRF - 400 mVp-p
Unit Notes
Power Supply Input Current ILCD
Power Consumption PLCD
Rush Current IRUSH_VLCD - - 3.0 A 3
Note :
1. The specified current and power consumption are under the V
whereas mosaic pattern(8 x 6) is displayed and f
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
-
-
-
is the frame frequency.
V
900 1170 mA 1
1450 1885 mA 2
10.80 14.04 Watt 1
17.40 22.62 Watt 2
=12.0V, 25 ± 2°C,fV=60Hz condition
LCD
Maximum current pattern
Mosaic Pattern(8 x 6)
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White Pattern
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LM270WQ1
Liquid Crystal Display
Product Specification
3-2. Interface Connections
3-2-1. LCD Module
- LCD Connector(CN1) : 20525-140E-01 (manufactured by I-PEX)
The pin configuration for the 40 pin connector is shown in the table below.
Table 3-1. MODULE CONNECTOR(CN1) PIN CONFIGURATION
No. Symbol Description No. Symbol Description
1 VIN 12V for LCM main power 21 HPD Hot Plug Detect Signal
2 VIN 12V for LCM main power 22 GND High Speed Ground for Auxiliary Channel
3 VIN 12V for LCM main power 23 AUX_CHN Component Signal for Auxiliary
4 VIN 12V for LCM main power 24 AUX_CHP True Signal for Auxiliary Channel
5 VIN 12V for LCM main power 25 GND High Speed Ground for Main Link 0
6 VIN 12V for LCM main power 26 Lane0P True Signal for Main Link 0
7 GND Ground 27 Lane0N Components Signal for Main Link 0
8 GND Ground 28 GND High Speed Ground for Main Link 1
9 GND Ground 29 Lane1P True Signal for Main Link 1
10 GND Ground 30 Lane1N Components Signal for Main Link 1
11 GND Ground 31 GND High Speed Ground for Main Link 2
12 GND Ground 32 Lane2P True Signal for Main Link 2
13 GND Ground 33 Lane2N Components Signal for Main Link 2
14 DDC_SDA DDC Data 34 GND High Speed Ground for Main Link 3
15 DDC_SCL DDC Clock 35 Lane3P True Signal for Main Link 3
16 GND Ground 36 Lane3N Components Signal for Main Link 3
17 I2C_SDA I2C Data 37 GND High Speed Ground
18 I2C_SCL I2C Clock 38 VIDEO_ON Video status from DP Rx
19 GND Ground 39 VSYNC Vertical sync output from DP Rx
20 SPDIF Audio output from DP Rx 40 GND Ground
Notes : 1. Connector
2.1 Connector (Receptacle) : 20525-140E-01(I-PEX)
2.2 Mating Connector (Plug) : TBD(I-PEX)
1
40
20525-140E-01 (I-PEX)
Ver. 0.0 DEC. 12. 2012
#1
Rear view of LCM
#40
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Product Specification
3-2. Interface Connections
3-2-2. Sync Connector
This connector is used for synchronized LED Driver.
The connector is 53780-8602. (Manufactured by MOLEX)
Table 4. LED SYNCHRONIZED CONNECTOR(CN2) PIN CONFIGURATION
Pin Symbol Description NOTES
1 DXP Positive connection to remote temp. sensor
2 DXN Negative connection to remote temp. sensor
LM270WQ1
Liquid Crystal Display
#1 #2
53780-8602
[ Figure 3-1 ] Thermal Sensor Connector diagram
#1 #2
Rear view of LCM
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LM270WQ1
Liquid Crystal Display
Product Specification
3-3. Signal Timing Specifications
All of the interface signal timing should be satisfied with the following specifications for it’s proper operation.
Table 6_1. TIMING TABLE (VESA COORDINATED VIDEO TIMING)
ITEM SYMBOL Min Typ Max Unit Note
DCLK
Hsync
Vsync
Data
Enable
Period t
Frequency f
Period t
Width-Active tWH 32 32 32
Period t
Frequency fV 59.95 59.95 59.95 Hz
Width-Active t
Horizontal Valid t
Horizontal Back Porch tHBP 80 80 80
Horizontal Front Porch t
Horizontal Blank - 160 160 160 t
Vertical Valid tVV 1440 1440 1440
CLK 4.14 4.14 4.14 ns
CLK 241.5 241.5 241.5 MHz -
HP 2720 2720 2720
CLK
t
VP 1481 1481 1481 tHP
WV 555tHP
HV 2560 2560 2560
t
CLK
HFP 48 48 48
WH+ tHBP+ tHFP
Vertical Back Porch tVBP 33 33 33
tHP
Vertical Front Porch t
Vertical Blank - 41 41 41 t
Note: Hsync period and Hsync width-active should be even number times of t
times of t
CLK, display control signal can be asynchronous. In order to operate this LCM a Hsync,
VFP 333
WV+ tVBP+ tVFP
CLK. If the value is odd number
Vsync, and DE(data enable) signals should be used.
1. The performance of the electro-optical characteristics may be influenced by variance of the vertical
refresh rates.
2. Vsync and Hsync should be keep the above specification.
3. Hsync Period, Hsync Width, and Horizontal Back Porch should be any times of of character
number(8).
4. The polarity of Hsync, Vsync is not restricted.
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3-4. Signal Timing Waveforms
LM270WQ1
Liquid Crystal Display
Product Specification
Hsync, Vsync, DE, DATA
t
CLK
Dclk
INVALID
DATA
DE(Data Enable)
Hsync
t
WH
0.5VDD
0.7VDD
0.3VDD
VALID
Data are latched at the falling edge of DCLK
t
HP
INVALID
t
HBP
t
HV
DE(Data Enable)
t
VP
t
WV
Vsync
t
VBP
t
VV
DE(Data Enable)
Ver. 0.0 DEC. 12. 2012
t
t
HFP
VFP
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LM270WQ1
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 the binary input, the brighter the color. The table below provides a reference for color versus data
input.
Table 7. COLOR DATA REFERENCE
Input Color Data
Basic
Color
RED
Color
Black 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Red (255) 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Green (255) 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0
Blue (255) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1
Cyan 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Magenta 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1
Yellow 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0
White 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
RED (000) Dark 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
RED (001) 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
... ... ... ...
RED (254) 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
RED (255) 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
GREEN (000) Dark 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
MSB LSB
R7 R6 R5 R4 R3 R2 R1 R0 G7 G6 G5 G4 G3 G2 G1 G0 B7 B6 B5 B4 B3 B2 B1 B0
RED
MSB LSB
GREEN
BLUE
MSB LSB
GREEN (001) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0
GREEN
GREEN (254) 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0
GREEN (255) 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0
BLUE (000) Dark 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
BLUE (001) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
BLUE
BLUE (254) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 0
BLUE (255) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1
... ... ... ...
... ... ... ...
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3-6. Power Sequence
3-6-1. Power Sequence
LM270WQ1
Liquid Crystal Display
Product Specification
0.4
500
Notes : [1] HPD is asserted high by Sink at power-up
[2] SYMBOL_LOCK indicated by contents of Sink DPCD registers 00202h to 00205h
[3] VIDEO_ON asserted high by Sink when video to panel is valid
[6] BL_EN is an active-high MLB enable signal for panel BLU
Notes : 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 for LCD V
3. LED power must be turn on after power supply for LCD and interface signal are valid.
Ver. 0.0 DEC. 12. 2012
to 0V.
LCD
12 / 29
3-6. Power Sequence
3-6-1. Power Sequence
LM270WQ1
Liquid Crystal Display
Product Specification
Notes : [2] SYMBOL_LOCK indicated by contents of Sink DPCD registers 00202h to 00205h
[4] Power-state set by Source in Sink DPCD register 00600h
[5] VIDEO_ON asserted low by Sink because of :
1) loss of SYMBOL_LOCK or
2) DP Sink is powered down
[7] BL_EN must be asserted low by system as rapidly as possible when video is invalid
to avoid visible artifacts
[8] T14 defines minimum off-time for 12V power
[9] min. times of 0 indicate precedence ordering of events, e.g. where actual timing is TBD
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LM270WQ1
Liquid Crystal Display
Product Specification
4. Optical Specifications
Optical characteristics are determined after the unit has been ‘ON’ for approximately 30 minutes
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 Φ and θ equal to 0 ° and aperture 1 degree.
FIG. 1 presents additional information concerning the measurement equipment and method.
Pritchard 880 or
equivalent
Optical Stage(x,y)
LCD Module
50cm
FIG. 1 Optical Characteristic Measurement Equipment and Method
Table 9. OPTICAL CHARACTERISTICS
Parameter Symbol
(Ta=25 °C, V
Values
Min Typ Max
Contrast Ratio CR 700 1000 - 1
Surface Luminance, white L
Luminance Variation
Response Time
Rise Time Tr
Decay Time Tr
δ
RED Rx
WH
WHITE
R
D
TBD TBD - cd/m
TBD % 3
- 6.5 14 ms 4.1
- 7.5 14 ms 4.1
TBD
Ry TBD
GREEN Gx TBD
Color Coordinates
[CIE1931]
Gy TBD
BLUE Bx TBD
Typ
TBD
By TBD
WHITE Wx TBD
Wy TBD
Color Shift
Horizontal
Vertical
θ
CST_H
θ
CST_V
- 178 -
- 178 -
Viewing Angle (CR>10)
θ
GMA_H
θ
GMA_V
θ
H
θ
V
170 178 170 178 -
178 178 -
General
Effective
Horizontal
Vertical
Horizontal
Vertical
Gray Scale 2.2 8
=12.0V, fV=60Hz Dclk=242.28MHz)
LCD
Units Notes
2
Typ
TBD
Degree 5
Degree 6
Degree 7
2
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Product Specification
Notes 1. Contrast Ratio(CR) is defined mathematically as :
RatioContrast =
It is measured at center point(Location P1)
LM270WQ1
Liquid Crystal Display
pixelswhiteallwithLuminanceSurface
pixels black all with Luminance Surface
2. Surface luminance(L
from the surface with all pixels displaying white. For more information see FIG 2.
3. The variation in surface luminance , δ WHITE is defined as :
Where L1 to L9 are the luminance with all pixels displaying white at 9 locations.
For more information see FIG 2.
4. Response time is the time required for the display to transition from black to white (Rise Time,
Tr
) and from white to black (Decay Time, TrD). For additional information see FIG 3
R
5. Color shift is the angle at which the color difference is lo wer than 0.04.
For more information see FIG 4.
- Color difference (Δu’v’)
'
=
u
WH)is luminance value at No.1 point across the LCD surface 50cm
WHITE
++−
yx
21
=
'
=
3122
v
2
2
)''()''('' vvuuvu −+−=Δ
21
δ
4
x
…
9
y
yx
)L .. ,L,Minimum(L
P9P2P1
100
×
)L .... ,L ,(L Maximum
P9P2P1
3122
++−
u’1, v’1 : u’v’ value at viewing angle direction
u’2, v’2 : u’v’ value at front (θ=0)
- Pattern size : 25% Box size
- Viewing angle direction of color shift : Horizontal, Vertical
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 surface. For more information see FIG 5.
7. Effective viewing angle is the angle at which the gamma shift of gray scale is lower than 0.3.
For more information see FIG 6 and FIG 7.
8. Gray scale specification
Gamma Value is approximately 2.2. For more information see Table 10.
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Product Specification
Measuring point for surface luminance & measuring point for luminance variation.
H
LM270WQ1
Liquid Crystal Display
H/2
●
●
P2
P5
V/2
V
●
V/10
The response time is defined as the following figure and shall be measured by switching the input signal for
“black” and “white”.
P7
FIG. 2 Measure Point for Luminance
TrR
●
●
●
P3
P1
P8
●
●
●
TrD
H/10
P4
P6
P9
100
90
Optical
Response
10
0
black
FIG. 3. Response Time
Ver. 0.0 DEC. 12. 2012
white
black
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Product Specification
Color shift is defined as the following test pattern and color.
FIG. 5 Test Pattern
LM270WQ1
Liquid Crystal Display
25% Box size
Average RGB values in Bruce RGB for Macbeth Chart
Dark skin Light skin Blue sky Foliage Blue flower Bluish green
R 98 206 85 77 129 114
G 56 142 112 102 118 199
B 45 123 161 46 185 178
Orange Purplish blue Moderate red Purple Yellow green Orange yellow
R 219 56 211 76 160 230
G 104 69 67 39 193 162
B 24 174 87 86 58 29
Blue Green Red Yellow Magenta cyan
R 26 72 197 241 207 35
G 32 148 27 212 62 126
B 145 65 37 36 151 172
White Neutral 8 Neutral 6.5 Neutral 5 Neutral 3.5 black
R 240 206 155 110 63 22
G 240 206 155 110 63 22
B 240 206 155 110 63 22
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Dimension of viewing angle range.
=
−
LM270WQ1
Liquid Crystal Display
Product Specification
φ
= 180°, Left
φ
= 270°, Down
Normal
E
θ
φ
FIG. 6 Viewing angle
Y
φ
= 90°, Up
φ
= 0°, Right
FIG. 7 Sample Luminance vs. gray scale
(using a 256 bit gray scale)
r
LaVL +=
b
FIG. 8 Sample Log-log plot of lumina nce
vs. gray scale
b
+
)log()log()log( aVrLL
Here the Parameter α and γ relate the signal level V to the luminance L.
The GAMMA we calculate from the log-log representation (FIG. 8)
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Table 10. Gray Scale Specification
Gray Level Relative Luminance [%] (Typ.)
00.10
31 1.08
63 4.71
95 11.5
127 21.7
159 35.5
191 53.1
223 74.5
255 100
LM270WQ1
Liquid Crystal Display
Product Specification
Ver. 0.0 DEC. 12. 2012
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LM270WQ1
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.
Horizontal 609.44 mm
Outline Dimension
(W/O)
Bezel Area
Active Display Area
Weight 920 g (Typ.)
Vertical 350.46 mm
Depth 1.75 mm
Horizontal N/A mm
Vertical N/A mm
Horizontal 596.74mm
Vertical 335.66mm
Surface Treatment
Hard coating(2H)
Glare, Low Reflection treatment of the front polarizer
Notes : Please refer to a mechanic drawing in terms of tolerance at the next page.
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Product Specification
LM270WQ1
Liquid Crystal Display
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Liquid Crystal Display
Product Specification
7. International Standards
7-1. Environment
a) RoHS, Directive 2002/95/EC of the European Parliament and of the council of 27 January 2003
LM270WQ1
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8. Packing
8-1. Packing Form
a) Package quantity in one box : 12 pcs
b) Box Size : 720 mm X 560 mm X 140 mm
LM270WQ1
Liquid Crystal Display
Product Specification
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LM270WQ1
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) 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.
(2) You should adopt radiation structure to satisfy the temperature specification.
(3) 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.
(4) 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.)
(5) When the surface becomes dusty, please wipe gently with absorbent cotton or other soft materials like
chamois soaks with petroleum benzene. Normal-hex ane 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.
(6) Wipe off saliva or water drops as soon as possible. Their long time contact with polarizer causes
deformations and color fading.
(7) Mechanical structure for backlight system should be designed for sustaining drive ass’y safely.
9-2. OPERATING PRECAUTIONS
(1) The spike noise causes the miss-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) 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.
(4) When fixed patterns are displayed for a long time, remnant image is likely to occur.
(5) 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.
(6) Please do not give any mechanical and/or acoustical impact to LCM. Otherwise, LCM can’t be operated
its full characteristics perfectly.
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LM270WQ1
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 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.
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