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LM270WQ1
Liquid Crystal Display
Product Specification
SPECIFICATION
FOR
APPROVAL
( ) Preliminary Specification
) Final Specification
(
BUYER
APPROVED BY
/
/
APPLE
K62 PRQMODEL
SIGNATURE
DATE
27.0” QHD TFT LCDTitle
SUPPLIER LG Display Co., Ltd.
*MODEL LM270WQ1
SUFFIX SDE5
*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
SIGNATURE
DATE
PREPARED BY
/
Please return 1 copy for your confirmation with
your signature and comments.
Ver. 1.0 JAN. 20. 2012
S R Yoo / Engineer
MNT Products Engineering Dept.
LG Display Co., Ltd.
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LM270WQ1
Liquid Crystal Display
Product Specification
Contents
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
4
5
6
7
7
10
13
14
15
16
20
26
29
7 INTERNATIONAL STANDARDS
7-1 SAFETY
7-2 EMC
8 PACKING
8-1 DESIGNATION OF LOT MARK
8-2 PACKING FORM
9 PRECAUTIONS 32
9-1 MOUNTING PRECAUTIONS 32
9-2 OPERATING PRECAUTIONS 32
9-3 ELECTROSTATIC DISCHARGE CONTROL 33
9-4 PRECAUTIONS FOR STRONG LIGHT EXPOSURE 33
9-5 STORAGE 33
9-6 HANDLING PRECAUTIONS FOR PROTECTION FILM 33
30
30
30
31
31
31
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10 EDID DATA 34
10-1 EDID DATA 34
10-2 EDID READ/WRITE PROTOCOL 37
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LM270WQ1
Liquid Crystal Display
Product Specification
Contents
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LM270WQ1
Liquid Crystal Display
Product Specification
RECORD OF REVISIONS
Revision
No
0.0 Nov. 1. 2010 - First Draft(Preliminary)
0.1 Feb. 25. 2011 1
0.2 Mar. 22. 2011 27~28 Update a mechanic drawing
0.3 Apr. 27. 2011 7 Update Electrical Characteristics
0.4 Jun. 9. 2011 1
0.5 Jun. 15. 2011 8 Update BER Spec
Revision Date Page Description
Nov. 15. 2010 34~37 Update EDID data
Update Model Name (K62AH Æ K62 PRQ)
8 Add BER Spec
14~15 Add Timing Table (VESA & CEA 1280x720 timing)
18
30 Update a mechanic drawing
5 Update Power Consumption
9 Update LED Bar Electrical Characteristics
22 Update Color Coordinates
30 Update a mechanic drawing
Update Power Sequence (T8 Min. : 500ms Æ 200ms)
Update Suffix (SDE1 Æ SDE5)
0.6 Jun. 23. 2011 12 Update LED Connector Pin Configuration
0.7 Jan. 20. 2012 5 Luminance Spec change
22 Luminance Spec change
23 Update Lot Minimum Luminance Spec
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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
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.
LM270WQ1
Mini-LVDS (RGB)
G1
Gate Driver Circuit
G1440
Source Driver Circuit
S1 S2560
TFT - LCD Panel
(2560 Ý RGB Ý 1440 pixels)
B/L System (White LED)
Main Link
4 Lane
AUX CH
HPD
DP function
LCD Power
12 V
CN1
(30pin)
CN7
(6pin)
Flash
memory
SPI
Logic Power
3.3V / 1.2V
EEPROM
(EDID)
I2C
Timing
Controller
Power
Enable
(Video On)
Power Circuit
Block
Vled
General Features
Active Screen Size 27.0 inches(68.47cm) diagonal
Outline Dimension 630.0(H) x 376.13(V) x 19.8(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 8-bit, 16,777,216 colors
Luminance, White 460 cd/m
2
( 5 points Avg.)
Viewing Angle(CR>10) View Angle Free (R/L 178(Typ.), U/D 178(Typ.))
Power Consumption
Total 73.52 Watt (Max.)
(10.92 Watt
@VLCD, Max 62.6 Watt_Duty 100% of DC 350 mA_w/o driver)
Weight 4050 g (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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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
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LM270WQ1
Liquid Crystal Display
Product Specification
Parameter Symbol
Power Input Voltage
Operating Temperature
Storage Temperature
Operating Ambient Humidity
Storage Humidity
VLCD -0.3 14 Vdc
TOP 050¶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
ڔڋڀ
ڑڋ
ڑڋڀ
ڏڋ
ڐڋ
ڏڋڀ
ڣېۈۄڿۄۏ۔ٻڶڃڀڄڭڣڸ
ڌڋڀ
ڲۀۏٻڝېۇڽ
گۀۈۋۀۍڼۏېۍۀٻڶڞڸ
ڎڋ
ڍڋ
ڌڋ
ڋ
at 25 2¶C
1, 2
ڮۏۊۍڼۂۀ
ڪۋۀۍڼۏۄۊۉ
ڌڋ ڍڋ ڎڋ ڏڋ ڐڋ ڑڋ ڒڋ ړڋڋڈڍڋ
ڟۍ۔ٻڝېۇڽٻگۀۈۋۀۍڼۏېۍۀٻڶڞڸ
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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)
Parameter Symbol
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LM270WQ1
Liquid Crystal Display
Product Specification
Values
Unit Notes
Min Typ Max
MODULE :
Power Supply Input voltage VLCD 11.6 12.0 12.4 Vdc
Permissive Power Input Ripple VdRF - 400 mVp-p
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
- (550) (720) mA 1
- (700) (910) mA 2
- (6.60) (8.64) Watt 1
(8.40) (10.92) Watt 2
=12.0V, 25 2¶C,fV=60Hz condition
is the frame frequency.
V
LCD
Maximum current pattern
Mosaic Pattern(8 x 6)
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3-1-2. DisplayPort Main Link Receiver Characteristics
DP628 which supports Apple BER Spec with below test condition is used for DP Rx.
Table 2-1-2. DISPLAYPORT MAIN LINK RECEIVER CHARACTERISTICS
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LM270WQ1
Liquid Crystal Display
Product Specification
Parameter
Symbol Error Rate,
normal link data transmission,
HBR, 4 lane operation
Note :
1. Jitter Tolerance Testing follows VESA DisplayPort™ PHY Compliance Testing Standard, Version 1.1a.
Jitter composition is specified in the Standard.
2. TJ at Receiver Connector (TP3) ≦0.491UI @ Bit Error Rate (BER) = 10
3. Eye Height at TP3 ≧ 150mVpp
4. Max lane to lane mismatch of insertion loss at TP3 : 20*log |max(eye height)/min(eye height)| ≦ 2.3dB
5. Max source pre-emphasis level at level 0 (0dB) ≦ 0.25dB
Min Typ Max
Values
-13
10 1~5
-13
Notes
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Product Specification
Table 2-2. LED Bar ELECTRICAL CHARACTERISTICS
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LM270WQ1
Liquid Crystal Display
Items Symbol
LED String Voltage V
LED String Power P
BL Power P
LED Life Time LED_LT 30K - Hrs
LED Junction Temperature Tj 150 -7,8
S
S
BL
Min Typ Max
(52.6) (56.1) (59.6) Vrms
(18.4) (19.6) (20.9) W
- (58.9) (62.6) W
Spec
Unit Remark Notes
Ta=25, at Duty 100%
of DC 350mA
Ta=25, at Duty 100%
of DC 350mA
Ta=25, at Duty 100%
of DC 350mA
Tj≤90, at Duty 100%
of DC 350mA
1,2,3,
7
1,2,3,
4,6,7
1,2,4,
6,7
5,7,8
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.
1. Specified values are for a single LED bar.
2. The specified current is input LED chip 100% duty current.
3. The specified voltage is input LED string and Bar voltage at typical 350 mA 100% duty current.
4. The specified power consumption is input LED bar power consumption at typical 350 mA 100% duty current.
5. The LED life time is determined as the time at which brightness of the LED is 70% compared to that of initial
value at the typical LED current on condition of continuous operating at below junction temperature 90¶C.
6. The LED power consumption shown above does not include loss of external driver.
The used LED BL current is the LED typical current.
P
String Power Consumption is calculated with
BL Power Consumption is calculated with
S
P
= V
BL
= VSx 350mA
x 350mA x 3 (String no.)
Bar
7. LED operating DC Forward Current and Junction Temperature must not exceed LED Max Ratings.
8. The LED life time and the maximum rating of LED junction temperature are evaluated at LED package level,
not at liquid crystal module level.
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Product Specification
3-2. Interface Connections
3-2-1. LCD Module
- LCD Connector(CN1) : 20525-030E-01 (manufactured by I-PEX)
The pin configuration for the 30 pin connector is shown in the table below.
Table 3-1. MODULE CONNECTOR(CN1) PIN CONFIGURATION
No. Symbol Description No. Symbol Description
1 GND Ground 16 Lane0N Components Signal for Main Link 0
LM270WQ1
Liquid Crystal Display
2 DDC_SDA DDC Data 17 GND High Speed Ground for Main Link 1
3 DDC_SCL DDC Clock 18 Lane1P True Signal for Main Link 1
4 GND Ground 19 Lane1N Components Signal for Main Link 1
5 I2C_SDA I2C Data 20 GND High Speed Ground for Main Link 2
6 I2C_SCL I2C Clock 21 Lane2P True Signal for Main Link 2
7 GND Ground 22 Lane2N Components Signal for Main Link 2
8 SPDIF Audio output from DP Rx 23 GND High Speed Ground for Main Link 3
9 OPTION_1 TBD 24 Lane3P True Signal for Main Link 3
10 HPD Hot Plug Detect Signal 25 Lane3N Components Signal for Main Link 3
11 GND High Speed Ground for Auxiliary Channel 26 GND High Speed Ground
12 AUX_CHN Component Signal for Auxiliary 27 VIDEO_ON Video status from DP Rx
13 AUX_CHP True Signal for Auxiliary Channel 28 OPTION_2 TBD
14 GND High Speed Ground for Main Link 0 29 VSYNC Vertical sync output from DP Rx
15 Lane0P True Signal for Main Link 0 30 GND Ground
Notes : 1. Connector
2.1 Connector(Receptacle) : 20525-030E-01(I-PEX)
2.2 Mating Connector(Plug) : 20523-030T-01(I-PEX)
1
30
#1
#30
Rear view of LCM
20525-030E-01 (I-PEX)
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Product Specification
3-2. Interface Connections
3-2-1. LCD Module
- Power Connector(CN7) : 53780-8608 (manufactured by MOLEX)
The pin configuration for the 6 pin connector is shown in the table below.
Table 3-2. POWER CONNECTOR(CN7) PIN CONFIGURATION
Pin Symbol Description NOTES
1 GND Ground
LM270WQ1
Liquid Crystal Display
2 GND Ground
3 GND Ground
4 VIN 12V for LCM main power
5 VIN 12V for LCM main power
6 VIN 12V for LCM main power
#1 #6
\Z^_WT_]W]
3-2-2. Sync Connector
This connector is used for synchronized LED Driver.
The connector is 53780-8604. (Manufactured by MOLEX)
Table 4. LED SYNCHRONIZED CONNECTOR(CN4) PIN CONFIGURATION
#1 #6
Rear view of LCM
Pin Symbol Description NOTES
1 DXP Positive connection to remote temp. sensor
2 DXN Negative connection to remote temp. sensor
3 GND Ground
4 VSYNCM VSYNCM for synchronized LED Driver
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3-2-3. 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
1NC NC
2 LED1- LED channel 1 Cathode
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LM270WQ1
Liquid Crystal Display
Product Specification
3 LED2+ LED channel 2 Anode
4NC NC
5NC NC
6 LED3- LED channel 3 Cathode
7 LED1+ LED channel 1 Anode
8NC NC
9NC NC
10 LED2- LED channel 2 Cathode
11 LED3+ LED channel 3 Anode
12 NC NC
1 Bar
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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
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LM270WQ1
Liquid Crystal Display
Product Specification
DCLK
Hsync
Vsync
Data
Enable
Period t
Frequency fCLK 241.5 241.5 241.5 MHz -
Period tHP 2720 2720 2720
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 tHFP 48 48 48
Horizontal Blank - 160 160 160 t
Vertical Valid tVV 1440 1440 1440
CLK 4.14 4.14 4.14 ns
tCLK
VP 1481 1481 1481 tHP
WV 555tHP
HV 2560 2560 2560
t
CLK
WH+ tHBP+ tHFP
Vertical Back Porch tVBP 33 33 33
t
HP
Vertical Front Porch tVFP 333
Vertical Blank - 41 41 41 t
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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Table 6_2. 1280x720 TIMING TABLE (VESA COORDINATED VIDEO TIMING)
ITEM SYMBOL Min Typ Max Unit Note
Period tCLK 13.43 13.43 13.43 ns
DCLK
Frequency f
Period tHP 1664 1664 1664
Hsync
Width-Active tWH 128 128 128
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LM270WQ1
Liquid Crystal Display
Product Specification
CLK 74.5 74.5 74.5 MHz -
tCLK
Period t
Vsync
Data
Enable
Frequency fV 59.85 59.85 59.85 Hz
Width-Active t
Horizontal Valid t
Horizontal Back Porch tHBP 192 192 192
Horizontal Front Porch tHFP 64 64 64
Horizontal Blank - 384 384 384 t
Vertical Valid tVV 720 720 720
Vertical Back Porch tVBP 20 20 20
Vertical Front Porch tVFP 333
Vertical Blank - 28 28 28 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,
VP 748 748 748 tHP
WV 555tHP
HV 1280 1280 1280
t
CLK
t
HP
CLK. If the value is odd number
WH+ tHBP+ tHFP
WV+ tVBP+ tVFP
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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Table 6_3. 1280x720 TIMING TABLE (CEA COORDINATED VIDEO TIMING)
ITEM SYMBOL Min Typ Max Unit Note
Period tCLK 13.47 13.47 13.47 ns
DCLK
Frequency f
Period tHP 1650 1650 1650
Hsync
Width-Active tWH 40 40 40
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LM270WQ1
Liquid Crystal Display
Product Specification
CLK 74.25 74.25 74.25 MHz -
tCLK
Period t
Vsync
Data
Enable
Frequency fV 60.00 60.00 60.00 Hz
Width-Active t
Horizontal Valid t
Horizontal Back Porch tHBP 220 220 220
Horizontal Front Porch tHFP 110 110 110
Horizontal Blank - 370 370 370 t
Vertical Valid tVV 720 720 720
Vertical Back Porch tVBP 20 20 20
Vertical Front Porch tVFP 555
Vertical Blank - 30 30 30 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,
VP 750 750 750 tHP
WV 555tHP
HV 1280 1280 1280
t
CLK
t
HP
CLK. If the value is odd number
WH+ tHBP+ tHFP
WV+ tVBP+ tVFP
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
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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)
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t
HFP
VFP
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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 the binary input, the brighter the color. The table below provides a reference for color versus data
input.
Table 7. COLOR DATA REFERENCE
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LM270WQ1
Liquid Crystal Display
Product Specification
Input Color Data
Basic
Color
RED
Color
Black 000000000000000000000000
Red (255) 1 1 1 1 1 1 1 1 0 0 00000000000000
Green (255) 0 0 0 0 0 0 0 0 1 1 11111100000000
Blue (255) 0 0 0 0 0 0 0 0 0 0 00000011111111
Cyan 000000001111111111111111
Magenta 111111110000000011111111
Yellow 111111111111111100000000
White 111111111111111111111111
RED (000) Dark 0 0 0 0 0 0 0 0 0 0 00000000000000
RED (001) 0 0 0 0 0 0 0 1 0 0 00000000000000
... ... ... ...
RED (254) 1 1 1 1 1 1 1 0 0 0 00000000000000
RED (255) 1 1 1 1 1 1 1 1 0 0 00000000000000
GREEN (000) Dark 0 0 0 0 0 0 0 0 0 0 00000000000000
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 00000100000000
GREEN
GREEN (254) 0 0 0 0 0 0 0 0 1 1 11111000000000
GREEN (255) 0 0 0 0 0 0 0 0 1 1 11111100000000
BLUE (000) Dark 0 0 0 0 0 0 0 0 0 0 00000000000000
BLUE (001) 0 0 0 0 0 0 0 0 0 0 00000000000001
BLUE
BLUE (254) 0 0 0 0 0 0 0 0 0 0 00000011111110
BLUE (255) 0 0 0 0 0 0 0 0 0 0 00000011111111
... ... ... ...
... ... ... ...
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3-6. Power Sequence
3-6-1. Power Sequence
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LM270WQ1
Liquid Crystal Display
Product Specification
0.4
200
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.
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3-6. Power Sequence
3-6-1. Power Sequence
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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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3-6-2. Power Sequence, EDID Read / Write
*** This timing is for fabrication purpose only, not for normal operation. ***
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LM270WQ1
Liquid Crystal Display
Product Specification
DP Logic Power(3.3V)
HPD
EDID Read*
ADDR : A1
Write protection
EDID Write*
ADDR : A0
VDP
0V
10
%
TE1
90
%
TE2
TE3
TE4
TE6
TE5
TE7
90
%
10
%
TE8
* EDID Read time and EDID write time will be exclusive.
Notes.
In case of without DP signal after DP logic power on, check HPD after TE1 time
and if HPD is low status then any time can read EDID
Table 8.1 POWER SEQUENCE, EDID
Parameter
TE1 - 30 50 ms
TE2 1000 - - ms
TE3 - 20 ms
TE4 1 - - ms
TE5 - - 2000 ms
TE6 1 - - ms
TE7 - 20 - ms
TE8 1 - - ms
Min Typ Max
Values
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3-6-3. State Machine
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LM270WQ1
Liquid Crystal Display
Product Specification
OFF MODE
NEGATIVE
DC STATE
(OR CABLE
UNPLUG)
SOURCE
WRITES
02
DP AUX
CHANNEL
NEGATIVE
LINE
SLEEP MODE
DPCD
0x600
VALUE
POSITIVE
DC STATE
SOURCE
WRITES
01
ON MODE
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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.
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LM270WQ1
Liquid Crystal Display
Product Specification
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
Color Coordinates
[CIE1931]
Color Shift
Viewing Angle (CR>10)
General
Effective
Gray Scale 2.2 8
Horizontal
Vertical
Horizontal
Vertical
Rise Time Tr
Decay Time Tr
RED Rx
GREEN Gx 0.298
BLUE Bx 0.150
WHITE Wx 0.313
Horizontal
Vertical
WH
WHITE
R
D
Ry 0.334
Gy 0.619
-0.03
By 0.047
Wy 0.329
CST_H
CST_V
H
V
GMA_H
GMA_V
(Ta=25 ¶C, V
Values
Min Typ Max
380 460 -cd/m22,9
- 6.5 14 ms 4.1
- 7.5 14 ms 4.1
0.652
Typ
- 178 -
- 178 -
170 178 -
170 178 -
178 -
178 -
=12.0V, fV=60Hz Dclk=242.28MHz)
LCD
Units Notes
30 % 3
Typ
+0.03
Degree 5
Degree 6
Degree 7
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Notes 1. Contrast Ratio(CR) is defined mathematically as :
It is measured at center point(Location P1)
RatioContrast
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LM270WQ1
Liquid Crystal Display
Product Specification
pixels white all with Luminance Surface
pixels black all with Luminance Surface
2. Surface luminance(L
the surface with all pixels displaying white. For more information see FIG 2.
= = Average[ Lon1,Lon2,Lon3,Lon4,Lon5]
L
WH
3. The variation in surface luminance , WHITE is defined as :
4. Response time is the time required for the display to transition from black to white (Rise Time,
Tr
5. Color shift is the angle at which the color difference is lower than 0.04.
WHI TE
Where L1 to L13 are the luminance with all pixels displaying white at 13 locations.
For more information see FIG 2.
) and from white to black (Decay Time, TrD). For additional information see FIG 3
R
For more information see FIG 4.
- Color difference (Δu’v’)
'
u
WH)is luminance value at 5 points average across the LCD surface 50cm from
)L .... ,L ,(L Average
on5on2on1
4
x
'
3122
yx
21
v
2
9
y
3122
yx
2
)''()''('' vvuuvu
21
u’1, v’1 : u’v’ value at viewing angle direction
u’2, v’2 : u’v’ value at front (θ=0)
)L .. ,L,Minimum(L- )L .. ,L,Maximum(L
on13on2on1on13on2on1
(%)100
- 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.
2
9. 5-lot moving average luminance is minimum 450 cd/m
5-lot moving average means the average of lot (n-4), (n-3), (n-2), (n-1) and (n).
Lot 1, 2, 3 and 4 individually will meet average 450 cd/m
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at center point. (Location P1)
2
at center point. (Location P1)
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Measuring point for surface luminance & measuring point for luminance variation.
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LM270WQ1
Liquid Crystal Display
Product Specification
H
A
H/16
67
B
V
V/10
A : H/4 mm
B : V/4 mm
@ H,V : Active Area
The response time is defined as the following figure and shall be measured by switching the input signal for
“black” and “white”.
100
90
9
11 12
FIG. 2 Measure Point for Luminance
2
1
4
TrR
3
5
Active Area
8
10
13
TrD
Optical
Response
10
0
black
FIG. 3. Response Time
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Color shift is defined as the following test pattern and color.
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LM270WQ1
Liquid Crystal Display
Product Specification
25% Box size
FIG. 4 Test Pattern
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.
= 180, Left
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Product Specification
Normal
E
Y
= 90, Up
LM270WQ1
Liquid Crystal Display
= 270, Down
FIG. 5 Viewing angle
FIG. 6 Sample Luminance vs. gray scale
(using a 256 bit gray scale)
= 0, Right
FIG. 7 Sample Log-log plot of luminance
vs. gray scale
r
LaVL
b
b
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)
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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
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LM270WQ1
Liquid Crystal Display
Product Specification
159 35.5
191 53.1
223 74.5
255 100
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5. Mechanical Characteristics
The contents provide general mechanical characteristics. In addition the figures in the next page are detailed
mechanical drawing of the LCD.
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LM270WQ1
Liquid Crystal Display
Product Specification
Horizontal 630.0mm
Outline Dimension
Bezel Area
Active Display Area
Weight 4050 g (Typ.)
Surface Treatment
Notes : Please refer to a mechanic drawing in terms of tolerance at the next page.
Vertical 376.13mm
Depth 19.8mm
Horizontal 601.7mm
Vertical 340.7mm
Horizontal 596.74mm
Vertical 335.66mm
Hard coating(2H)
Glare, Low Reflection treatment of the front polarizer
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VIEW>
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Liquid Crystal Display
Product Specification
<FRONT VIEW>
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<REAR VIEW>
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6. Reliability
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
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LM270WQ1
Liquid Crystal Display
Product Specification
Vibration test
5
(non-operating)
Shock test
6
(non-operating)
Altitude
7
Operating
Storage / Shipment
Wave form : random
Vibration level : 1.0G RMS
Bandwidth : 10-300Hz
Duration : X,Y,Z, 10 min
One time each direction
Shock level : 100Grms
Waveform : half sine wave, 2ms
Direction : ᇹX, ᇹY, ᇹZ
One time each direction
0 - 10,000 feet(3,048m)
0 - 40,000 feet(12,192m)
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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
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LM270WQ1
Liquid Crystal Display
Product Specification
Class 1M LED Product
IEC60825-1 : 2001
Embedded LED Power (Class 1M)
2. Caution
: LED inside.
Class 1M laser (LEDs) radiation when open.
Do not open while operating.
7-2. EMC
a) ANSI C63.4 “American National Standard for Methods of Measurement of Radio-Noise
Emissions from Low-Voltage Electrical and Electronic Equipment in the Range of 9 kHz to 40 GHz.”
American National Standards Institute (ANSI), 2003.
b) CISPR 22 “Information technology equipment – Radio disturbance characteristics – Limit and
methods of measurement." International Special Committee on Radio Interference
(CISPR), 2005.
c) CISPR 13 “Sound and television broadcast receivers and associated equipment – Radio disturbance
characteristics – Limits and method of measurement." International Special Committee on Radio
Interference (CISPR), 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
ABCDEFGHI JKLM
A,B,C : SIZE(INCH) D : YEAR
E : MONTH F ~ M : SERIAL NO.
Note
1. YEAR
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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 : 700mm X 355mm X 430mm
2016G2017H2018J2019
F
Jun7Jul8Aug9Sep
6
CBA
2014E2015
D
Apr5May
4
201320122011
2020
K
Oct
A
Nov
B
DecMarFebJan
C321
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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.
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Product Specification
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) Partial darkness may happen during 3~5 minutes when LCM is operated initially in condition that
luminance is under 40% at low temperature (under 5). This phenomenon which disappears naturally
after 3~5 minutes is not a problem about reliability but LCD characteristic
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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.
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LM270WQ1
Liquid Crystal Display
Product Specification
(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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10. EDID DATA
10-1. EDID Data
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10-2. EDID DATA READ/WRITE PROTOCOL
10-2-1. READ Operation
<Start><Slave Address, RW=0><Byte Address><Start><Slave Address, RW=1><Data><Stop>
10-2-2. WRITE Operation
<Start><Slave Address, RW=0><Byte Address><Data><Stop>
- Device Address (Slave Address)
Type Device (Slave) Address Hex
IS24C02B
- Byte Address
Decimal 0 ~ 255
Hex 0x00 ~ 0xFF
1010000
Byte Address
RW
0xA0 + RW
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