LG Display LM270WQ1-SDDB Specification

( ) Preliminary Specification

charles
cheng

數位簽署者：charles cheng
DN：ou=DUNS - 65-873-1930,
o=PEGATRON CORPORATION,
ou=Individuals G2, ou=Terms of Use at
www.verisign.com/rpa (c)00, cn=charles
cheng,
email=[e-mail]
日期︰2011.12.23 16:49:44 +08'00'

(◆) Final Specification

Product Specification

Product Specification

SPECIFICATION

FOR

APPROVAL

27.0” QHD TFT LCDTitle

LM270WQ1

LM270WQ1

Liquid Crystal Display

Liquid Crystal Display

BUYER

APPROVED BY

/

/

/

HP

-MODEL

SIGNATURE

DATE

SUPPLIER LG Display Co., Ltd.

*MODEL LM270WQ1

SUFFIX SDDB

*When you obtain standard approval,

please use the above model name without suffix

APPROVED BY

K. G. Park / G.Manager

REVIEWED BY

S. W. Lee / Manager [C]

Y. S. Chung / Manager[M]

D. H. Kang / Manager [P]

PREPARED BY

J. A. Lee / Engineer

SIGNATURE

DATE

Please return 1 copy for your confirmation with

your signature and comments.

Ver. 1.0 Nov. 04. 2011

MNT Products Engineering Dept.

LG Display Co., Ltd

1 / 29

LM270WQ1

Liquid Crystal Display

Product Specification

Contents

No ITEM Page

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

1

2

3

4

5

6

6

9

11

12

13

14

16

22

25

7 INTERNATIONAL STANDARDS

7-1 SAFETY

7-2 EMC

7-3 ENVIRONMENT

8 PACKING

8-1 DESIGNATION OF LOT MARK

8-2 PACKING FORM

9 PRECAUTIONS 28

9-1 MOUNTING PRECAUTIONS 28

9-2 OPERATING PRECAUTIONS 28

9-3 ELECTROSTATIC DISCHARGE CONTROL 29

9-4 PRECAUTIONS FOR STRONG LIGHT EXPOSURE 29

9-5 STORAGE 29

9-6 HANDLING PRECAUTIONS FOR PROTECTION FILM 29

26

26

26

30

27

27

27

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Product Specification

RECORD OF REVISIONS

LM270WQ1

Liquid Crystal Display

Revision

No

0.1 Oct. 19. 2011 - First Draft(Preliminary)

1.0 Nov. 04. 2011 Final Specifications.

Revision Date Page Description

Ver. 1.0 Nov. 04. 2011

3 / 29

LM270WQ1

Liquid Crystal Display

Product Specification

1. General Description

LM270WQHD 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
ac t iv e d i s p la y a rea w i th Q H D re s ol u ti o n (2560 ver ti c al by 1440 hor iz o nt al pi x el ar ra y)
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 i nt e nd e d to s u p p o r t di s p l a y s w he re h i gh b r i g h t n e s s, s u p e r w i d e vi ew i n g a ng le ,
high color saturation, and high color are important.

Mini-LVDS (RGB)

Source Driver Circuit

S1 S2560

TFT - LCD Panel

(2560 × RGB × 1440 pixels)

B/L System (White LED)

Main Link

4 Lane

AUX CH

HPD

DP function

Logic Power

3.3V

LCD Power

12 V

CN1

(30pin)

Flash

memory

SPI

Timing

Controller

Logic Power

3.3V / 1.2V

Power Circuit

Power
Enable
(Video On)

Block

Vled

General Features

Active Screen Size 27.0 inches(68.47cm) diagonal

Outline Dimension 630.0(H) x 376.13(V) x 21.8(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 1.07 Billion colors, 8Bit with A-FRC

Luminance, White 380 cd/m

2

(Center 1Point, Typ.)

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

Power Consumption

Total 90.69 Watt (Max.)
(15.36 Watt @VLCD, Max 75.33 Watt_Duty 100% of DC 310 mA_w/o driver)

Weight 4,600g (typ.)

Display Operating Mode Transmissive mode, normally black

Surface Treatment Advanced Anti-Glare treatment of the front polarizer

HDCP HDCP key implemented in Tcon (DP628)

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4 / 29

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

Power Input Voltage

Operating Temperature

Storage Temperature

Operating Ambient Humidity

Storage Humidity

VLCD -0.3 14 Vdc

VDPLOGIC -0.5 4 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

90%

60

60%

40

50

40%

Humidity [(%)RH]

10%

Wet Bulb
Temperature [C]

30

20

10

0

at 25  2°C

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 11.4 12.0 12.6 Vdc

Permissive Power Input Ripple VRF_VLCD - - 400 mVp-p

Unit Notes

Power Supply Input Current ILCD

Power Consumption PLCD

Rush Current IRUSH_VLCD - - 3.0 A 3

DP Logic Input Voltage VCC_L_IN 3.13 3.3 3.47 Vdc

Permissive Logic Input Ripple VRF_VCC_L_IN - - 100 mVp-p

DP Logic Input Current I_VCC_L_IN

DP Logic Power Consumption P_VCC_L_IN 1.0 Watt

DP Rush Current IRUSH_VCC_L_IN - - 1.0 A 3

- 890 1025 mA 1

- 1280 1475 mA 2

- 10.68 12.30 Watt 1

15.36 17.70 Watt 2

300 mA 1

300 mA 2

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6 / 29

Liquid Crystal Display

Product Specification

Note :

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

LCD

Maximum current pattern

LM270WQ1

Mosaic Pattern(8 x 6)

White Pattern

Ver. 1.0 Nov. 04. 2011

7 / 29

Product Specification

Table 2-2. LED Bar ELECTRICAL CHARACTERISTICS

LM270WQ1

Liquid Crystal Display

Items Symbol

LED String Current I

LED String Voltage V

LED String Power P

BL Power P

LED Life Time LED_LT (39,000) - Hrs 4,6

LED driver design guide

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

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 and output current should be
Constant current control.
Please control feedback current of each string individually to compensate the current variation
among the strings of LEDs.
When you design or order the LED driver, please make sure unwanted lighting caused by
the mismatch of the LED and the LED driver (no lighting, flicker, etc) never occurs.
When you confirm it, the LCD module should be operated in the same condition as installed in
your instrument.

Spec

Min Typ Max

S

S

S

BL

- 310 330 mA

30.5 35.5 40.5 V

9.46 11.01 12.56 W 5,6

- 66.03 75.33 W 3,5,6

Unit Remark Notes

Ta=25℃

Ta=25℃, at Duty 100%

of DC 310 mA

1

2,6

※ Specified values are for a single LED bar including Left & Right Bar.

1. The specified current is input LED chip 100% duty current.

2. The specified voltage is input LED string and Bar voltage at typical 310 mA 100% duty current.

3. The specified power consumption is input BL power consumption at typical 310 mA 100% duty current.

4. The life is determined as the time at which luminance of the LED is 50% compared to that of initial
value at the typical LED current on condition of continuous operating at 25  2°C.

5. The LED power consumption shown above does not include loss of external driver.
The used LED BL current is the LED typical current.
String Power Consumption is calculated with PS = VSx typical current (mA)
BL Power Consumption is calculated with PBL= Ps x the number of string

6. LED operating DC Forward Current must not exceed LED Max Ratings.

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Product Specification

3-2. Interface Connections

3-2-1. LCD Module

- LCD Connector(CN1). : FI-X30SSL-HF (manufactured by JAE)
The pin configuration for the 30 pin connector is shown in the table below.

Table 3 MODULE CONNECTOR(CN_SIG) PIN CONFIGURATION

LM270WQ1

Liquid Crystal Display

DescriptionSymbolPin No.

DDC_SCL1

GND3

AUX_CH N4

GND6

Lane0P7

Lane0N8

GND9

GND12

DDC for Clock

DDC for DataDDC_SDA2

High Speed Ground for Auxiliary
Channel

Component Signal for Auxiliary
Channel

True Signal for Auxiliary ChannelAUX_CH P5

High Speed Ground for Main
Link 0

True Signal for Main Link 0

Component Signal for Main Link 0

High Speed Ground for Main
Link 1

True Signal for Main Link 1Lane1P10

Component Signal for Main Link 1Lane1N11

High Speed Ground for Main
Link 2

Pin No.

16

17

18

19

20

21

22

23

24

25

26

27

Symbol

Lane3P

Lane3N

GND

VIDEO_
ON

HPD

GND

GND

GND

GND

VLCD

VLCD

True Signal for Main Link 3

Component Signal for Main Link 3

High Speed Ground

Audio output from DP RXSPDIF

Video status from DP RX

Hot Plug Detect Signal

GND for main power

GND for main power

GND for main power

GND for main power

12V for LCM main power

12V for LCM main power

Description

True Signal for Main Link 2Lane2P13

Component Signal for Main Link 2Lane2N14

GND15

High Speed Ground for Main
Link 3

Notes : 1. Connector

2.1 Connector(Receptacle) : FI-X30SSL-HF(JAE) or 20389-Y30E-01(I-PEX)

2.2 Mating Connector(Plug) : FI-X30HL(JAE) or 20385-Y30T-12F(I-PEX)

Ver. 1.0 Nov. 04. 2011

28

29

30

VLCD

VLCD

VCC_L_IN

12V for LCM main power

12V for LCM main power

3.3V for DP TCON power

9 / 29

Product Specification

3-2-2. Backlight Interface

- LED Connector : H401K-D12N-12B (Manufactured by E&T)

- Mating Connector : 4530K-F12N-01R (Manufactured by E&T)

Table 5. LED CONNECTOR PIN CONFIGULATION

Pin No. Symbol Description Note

1 L_LED1+ LED channel 1 Anode

2 L_LED1- LED channel 1 Cathode

LM270WQ1

Liquid Crystal Display

3 L_LED2+ LED channel 2 Anode

4 L_LED2- LED channel 2 Cathode

5 L_LED3+ LED channel 3 Anode

6 L_LED3- LED channel 3 Cathode

7 R_LED1+ LED channel 1 Anode

8 R_LED1- LED channel 1 Cathode

9 R_LED2+ LED channel 2 Anode

10 R_LED2- LED channel 2 Cathode

11 R_LED3+ LED channel 3 Anode

12 R_LED3- LED channel 3 Cathode

3-2-3. Sync Connector

This connector is used for synchronized LED Driver.
The connector is 53780-8604. (Manufactured by MOLEX)

Table 5. LED SYNCHRONIZED CONNECTOR(CN4) PIN CONFIGURATION

Left bar

Right bar

Pin Symbol Description NOTES

1 GND Ground

2 ENBLT Enable

3 PWM PWM for synchronized LED Driver 1

4 I_RES GSP for synchronized LED Driver 2

Note: 1. PWM signal follows multiplied Horizontal frequency and level is 3.3V TTL level.

2. GSP frequency follows refresh time and level is 3.3V TTL level
and high width is 1/(Horizotal freq).

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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. TIMING TABLE (VESA COORDINATED VIDEO TIMING)

ITEM SYMBOL Min Typ Max Unit Note

Period tCLK 4.14 4.14 4.14 ns

DCLK

Frequency fCLK 241.5 241.5 241.5 MHz -

Period tHP 2720 2720 2720

Hsync

Width-Active tWH 32 32 32

Period tVP 1481 1481 1481 tHP

tCLK

Vsync

Data

Enable

Frequency fV 59.95 59.95 59.95 Hz

Width-Active tWV 5 5 5 tHP

Horizontal Valid tHV 2560 2560 2560

Horizontal Back Porch tHBP 80 80 80

Horizontal Front Porch tHFP 48 48 48

Horizontal Blank - 160 160 160 tWH+ tHBP+ tHFP

Vertical Valid tVV 1440 1440 1440

Vertical Back Porch tVBP 33 33 33

Vertical Front Porch tVFP 3 3 3

Vertical Blank - 41 41 41 tWV+ tVBP+ tVFP

tCLK

tHP

Note: Hsync period and Hsync width-active should be even number times of tCLK. If the value is odd number

times of tCLK, display control signal can be asynchronous. In order to operate this LCM a Hsync,

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. 1.0 Nov. 04. 2011

t

t

HFP

VFP

12 / 29

LM270WQ1

Liquid Crystal Display

Product Specification

3-5. Color Data Reference

The Brightness of each primary color(red,green,blue) is based on the 10-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 5. COLOR DATA REFERENCE

Input Color Data

Basic
Color

RED

Color

Black

Red (1023)

Green (1023)

Blue (1023)

Cyan

Magenta

Yellow

White

RED (000)

RED (001)

...

RED (1022)

RED (1023)

GREEN (000)

RED

MSB LSB

R9 R8 R7 R6 R5 R4 R3 R2 R1 R0 G9 G8 G7 G6 G5 G4 G3 G2 G1 G0 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1

0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

... ... ...

1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 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 LS B

GREEN

BLUE

MSB LSB

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0

... ... ...

0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1

... ... ...

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1

GREEN

BLUE

GREEN (001)

...

GREEN (1022)

GREEN (1023)

BLUE (000)

BLUE (001)

...

BLUE (1022)

BLUE (1023)

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3-6. Power Sequence

3-6-1. Power Sequence

LM270WQ1

Liquid Crystal Display

Product Specification

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

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. 1.0 Nov. 04. 2011

0.4

to 0V.

LCD

14 / 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

[6] BL_ON must be asserted low by system as rapidly as possible when video is invalid

to avoid visible artifacts
[7] T17 always > T19
[8] 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 70 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  and  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

Contrast Ratio CR 700 1000 - 1

Surface Luminance, white L

Luminance Variation

Response Time

Rise Time Tr

Decay Time Tr

RED Rx

GREEN Gx 0.304

Color Coordinates
[CIE1931]

BLUE Bx 0.148

WHITE Wx 0.313

Color Shift

Horizontal

Vertical

Viewing Angle (CR>10)

General

Effective

Horizontal

Vertical

Horizontal

Vertical

Gray Scale 2.2 8

WH



WHITE

R

D

Ry 0.334

Gy 0.619

-0.03

By 0.049

Wy 0.329



CST_H



CST_V



H



V



GMA_H



GMA_V

(Ta=25 °C, V

Values

Min Typ Max

300 380 - cd/m

=12.0V, fV=60Hz Dclk=242.28MHz)

LCD

Units Notes

2

75 % 3

- 6.5 14 ms 4.1

- 7.5 14 ms 4.1

0.652

Typ

Typ

+0.03

- 178 -

- 178 -

170 178 -

170 178 -

178 -

178 -

Degree 5

Degree 6

Degree 7

2

Ver. 1.0 Nov. 04. 2011

16 / 29

Product Specification

3122

4

'





yx

x

u

3122

9

'





yx

y

v

2

21

2

21

)''()''('' vvuuvu 

pixels black all with Luminance Surface

pixels white all with Luminance Surface

RatioContrast 

100

)L .... ,L ,(L Maximum

)L .. ,L,Minimum(L

P9P2P1

P9P2P1







WHIT E



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

It is measured at center point(Location P1)

2. Surface luminance(LWH)is luminance value at center 1 point(1) across the LCD surface 50cm from
the surface with all pixels displaying white. For more information see FIG 2.

3. The variation in surface luminance ,  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,
TrR) and from white to black (Decay Time, TrD). For additional information see FIG 3

LM270WQ1

Liquid Crystal Display

5. Color shift is the angle at which the color difference is lower than 0.04.

For more information see FIG 4.

- Color difference (Δu‟v‟)

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.

Ver. 1.0 Nov. 04. 2011

17 / 29

Product Specification

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

LM270WQ1

Liquid Crystal Display

<Measuring point for luminance variation> <Measuring point for surface luminance>

H

H/2

V/2

V

V/10

5 6

7

Active Area

3

1

8

H : 596.74 mm

H/10

H/2

42

9

H

V/2

V

V : 335.66 mm
@ H,V : Active Area

FIG. 2 Measure Point for Luminance

The response time is defined as the following figure and shall be measured by switching the input signal for

“black” and “white”.

TrR

100

90

Optical
Response

10

0

black

white

FIG. 3. Response Time

Ver. 1.0 Nov. 04. 2011

TrD

black

18 / 29

Product Specification

Color shift is defined as the following test pattern and color.

FIG. 4 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

Ver. 1.0 Nov. 04. 2011

19 / 29

Dimension of viewing angle range.

Normal

Y

E







= 0, Right



= 180, Left



= 270, Down



= 90, Up

b

r

LaVL 

)log()log()log( aVrLL

b



LM270WQ1

Liquid Crystal Display

Product Specification

FIG. 5 Viewing angle

FIG. 6 Sample Luminance vs. gray scale

(using a 256 bit gray scale)

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. 7)

Ver. 1.0 Nov. 04. 2011

FIG. 7 Sample Log-log plot of luminance

vs. gray scale

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Table 10. Gray Scale Specification

Gray Level Relative Luminance [%] (Typ.)

0 0.10

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

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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 630.0mm

Outline Dimension

Bezel Area

Active Display Area

Weight 4,600g(Typ.)

Surface Treatment

Vertical 376.13mm

Depth 21.8mm

Horizontal 601.7mm

Vertical 340.7mm

Horizontal 596.74mm

Vertical 335.66mm

Hard coating(3H)
Anti-glare treatment of the front polarizer

Notes : Please refer to a mechanic drawing in terms of tolerance at the next page.

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<FRONT VIEW>

LM270WQ1

Liquid Crystal Display

Product Specification

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<REAR VIEW>

LM270WQ1

Liquid Crystal Display

Product Specification

Ver. 1.0 Nov. 04. 2011

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6. Reliability

Environment test condition

No Test Item Condition

1 High temperature storage test Ta= 60°C 240hrs

2 Low temperature storage test Ta= -20°C 240hrs

3 High temperature operation test Ta= 50°C 50%RH 240hrs

4 Low temperature operation test Ta= 0°C 240hrs

5

Vibration test
(non-operating)

LM270WQ1

Liquid Crystal Display

Product Specification

Wave form : random
Vibration level : 1.0G RMS
Bandwidth : 10-300Hz
Duration : X,Y,Z, 10 min

One time each direction

Shock level : 100Grms

6

7

Shock test
(non-operating)

Altitude

Operating
Storage / Shipment

Waveform : half sine wave, 2ms
Direction : ± X, ± Y, ± Z

One time each direction

0 - 10,000 feet(3,048m)
0 - 40,000 feet(12,192m)

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LM270WQ1

Liquid Crystal Display

Product Specification

7. International Standards

7-1. Safety

a) UL 60950-1, Second Edition, Underwriters Laboratories Inc.

Information Technology Equipment - Safety - Part 1 : General Requirements.

b) CAN/CSA C22.2 No.60950-1-07, Second Edition, Canadian Standards Association.

Information Technology Equipment - Safety - Part 1 : General Requirements.

c) EN 60950-1:2006 + A11:2009, European Committee for Electrotechnical Standardization (CENELEC).

Information Technology Equipment - Safety - Part 1 : General Requirements.

d) IEC 60950-1:2005, Second Edition, The International Electrotechnical Commission (IEC).

Information Technology Equipment - Safety - Part 1 : General Requirements.
(Including report of IEC60825-1:2001 clause 8 and clause 9)

Notes

1. Laser (LED Backlight) Information

Class 1M LED Product

IEC60825-1 : 2001

Embedded LED Power (Class1M)

2. Caution
: LED inside.

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

7-2. EMC

a) ANSI C63.4–2003 “American National Standard for Methods of Measurement of Radio-

Noise Emissions from Low-Voltage Electrical and Electronic Equipment in the Range of

9kHz to 40GHz.” American National Standards Institute (ANSI), 2003.

b) C.I.S.P.R. Pub. 22. Limits and methods of measurement of radio interference

characteristics of information technology equipment." International Special Committee
on Radio Interference (C.I.S.P.R.), 2005.

c) EN 55022 "Limits and methods of measurement of radio interference characteristics of

information technology equipment." European Committee for Electrotechnical
Standardization (CENELEC), 2006.

7-3. Environment

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

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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 ~ M : SERIAL NO.

Note

1. YEAR

LM270WQ1

Liquid Crystal Display

Product Specification

Year

Mark

2. MONTH

Month

Mark

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 box : 7ea

b) Box Size : 747mm X 335mm X 466mm

2016G2017H2018J2019

F

Jun

Jul8Aug9Sep

6

7

CBA

2014E2015

D

Apr5May

4

201320122011

2020

K

Oct

A

Nov

B

DecMarFebJan

C321

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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) 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 benzene. 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.
(10) As The IPS panel is sensitive & slim, please recommend the metal frame of the system supports the panel

by the double side-mount.

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) Brightness depends on the temperature. (In higher 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.
(10) When LCMs are used for public display defects such as Yogore, image sticking can not be guarantee.

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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.

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.

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