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LM270WF3
Liquid Crystal Display
Product Specification
SPECIFICATION
FOR
APPROVAL
( ) Preliminary Specification
( ) Final Specification
Title 27" Full HD TFT LCD
BUYER ACER SUPPLIER LG Display Co., Ltd.
MODEL *MODEL LM270WF3
SUFFIX TLA1
*When you obtain standard approval,
please use the above model name without suffix
SIGNATURE APPROVED BY DATE
APPROVED BY
DATE
K.G. PARK / G.Manager
/
REVIEWED BY
J.H.SONG / Manager [C]
/ S.Y.AN / Manager [M]
H.J.LEE / Manager [P]
PREPARED BY
/ N.H. KIM / Engineer
Please return 1 copy for your confirmation with Product Engineering Dept.
LG Display Co., Ltd
your signature and comments.
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LM270WF3
Liquid Crystal Display
Product Specification
CONTENTS
No ITEM Page
COVER 1
CONTENTS 2
RECORD OF REVISIONS 3
1 GENERAL DESCRIPTION 4
2 ABSOLUTE MAXIMUM RATINGS 5
3 ELECTRICAL SPECIFICATIONS 6
3-1 ELECTRICAL CHARACTREISTICS 6
3-2 INTERFACE CONNECTIONS 9
3-3 LVDS CHARACTERISTICS 12
3-4 SIGNAL TIMING SPECIFICATIONS 16
3-5 SIGNAL TIMING WAVEFORMS 17
3-6 COLOR DATA REFERNECE 18
3-7 POWER SEQUENCE 19
4 OPTICAL SFECIFICATIONS 20
5 MECHANICAL CHARACTERISTICS 24
6 RELIABLITY 27
7 INTERNATIONAL STANDARDS 28
7-1 SAFETY 28
7-2 EMC 28
7-3 ENVIRONMENT 28
8 PACKING 29
8-1 DESIGNATION OF LOT MARK 29
8-2 PACKING FORM 29
9 PRECAUTIONS 30
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LM270WF3
Liquid Crystal Display
Product Specification
RECORD OF REVISIONS
Revision
Revision Date Page Description
No
0.1 May,27,2010 - First Draft, Preliminary Specifications
0.2 July,08,2010 6 Power Consumption Update
20 Color Coordinates Update
26 Weight Update
0.3 Aug.,02,2010 6 Power Consumption Update
0.4 Aug.,10,2010 7 LED bar Electrical Characteristics Update
27,28 Drawing Update
31 BOX Size Update
0.5 Aug.,18,2010 20 Optical Characteristics Update
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LM270WF3
Liquid Crystal Display
Product Specification
1. General Description
LM270WF3-TLA1 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 white mode. It has a 27 inch diagonally measured active
display area with FHD resolution (1080 vertical by 1920 horizontal pixel array) Each pixel is divided into Red,
Green and Blue sub-pixels or dots which are arranged in vertical stripes. Gray scale or the brightness of the
sub-pixel color is determined with a 8-bit gray scale signal for each dot, thus, presenting a palette of more than
16,7M colors with Advanced-FRC(Frame Rate Control). It has been designed to apply the interface method
that enables low power, high speed, low EMI. FPD Link or compatible must be used as a LVDS(Low Voltage
Differential Signaling) chip. It is intended to support applications where thin thickness, wide viewing angle, low
power are critical factors and graphic displays are important. In combination with the vertical arrangement of
the sub-pixels, the LM270WF3-TLA1 characteristics provide an excellent flat panel display for office automation
products such as monitors.
FIG. 1 Block diagram
Mini-LVDS(RGB)
LVDS LVDS 3,4
Source Driver Circuit
2Port CN2
(41pin) Timing Control Block S1 S1920
LVDS 1,2
Dual Gate Driver Circuit
G1
LVDS CN1
2Port (51pin)
TFT - LCD Panel
(1920 RGB 1080 pixels)
VLCD
Power Circuit Block
(+12V)
G1080
Backlight assembly (Single LED Bar)
FB 4ch
General Features
Active Screen Size 27 inches (68.6cm) diagonal
Outline Dimension 630(H) x 368.2(V) x 17.8 (D) mm (Typ.)
Pixel Pitch 0.3114(H) mm x 0.3114(V) mm
Pixel Format 1920 horizontal x 1080 vertical Pixels, RGB stripe arrangement
Color Depth 16.7M colors
Luminance, White 400 cd/m2 (Center, 1 point)
Viewing Angle(CR>10) R/L 170(Typ.), U/D 160(Typ.)
Power Consumption Total 29.28 W (Typ.) ( 5.34 W @ VLCD, 23.94 W @ 400 cd/m2)
Weight 3062 g (Typ.)
Display Operating Mode Transmissive mode, Normally White
Surface Treatment Hard coating (3H) & Anti-Glare treatment of the front polarizer
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LM270WF3
Liquid Crystal Display
Product Specification
2. Absolute Maximum Ratings
The following are maximum values which, if exceeded, may cause faulty operation or permanent
damage to the unit.
Table 1. Absolute Maximum Ratings
Values
Parameter Symbol Units Notes
Min Max
Power Supply Input Voltage VLCD -0.3 12.4 Vdc at 25 r 2 C
Operating Temperature TOP 0 50 C
Storage Temperature TST -20 60 C
1
Operating Ambient Humidity HOP 10 90 %RH
Storage Humidity HST 10 90 %RH
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.
90%
60
60%
50 Storage
Humidity [(%)RH]
Wet Bulb
Temperature [C]
40
40%
Operation
30
20
10
0
10%
-20 0 10 20 30 40 50 60 70 80
Dry Bulb Temperature [C]
Figure 2. Temperature and Relative Humidity
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LM270WF3
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 LED/Backlight is typically generated by an LED Driverr.
The LED Driver is an external unit to the LCDs.
Table 2. Electrical Characteristics (Module)
Values
Parameter Symbol 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 1
Differential Impedance Zm 90 100 110 Ohm
I LCD-MOSAIC_60Hz - 445 530 mA 2
I LCD-Black_60Hz - 545 650 mA 3
Power Supply Input Current
I LCD-MOSAIC_120Hz - 630 750 mA
I LCD-Black_120Hz - 830 990 mA
Power Consumption PLCD - 5.34 10.8 W 2
Rush current I RUSH - - 3.0 A 4
Note :
1. Permissive power ripple should be measured under VLCD=12.0V, 25 2 C, fV (frame frequency)= 120Hz
condition and at that time, we recommend the bandwidth configuration of oscilloscope is to be under 20MHz.
2. The specified current and power consumption are under the VLCD =12.0V, 25 r 2 C, fV = 60Hz condition
whereas Mosaic pattern shown in the [ Figure 3. ] is displayed.
3. The specified current is measured at the Full black pattern.
4. The duration of rush current is about 5ms and measured under condition that the rising time of power
input is 500us r 20%.
Figure 3. Pattern for Electrical Characteristics
Mosaic Pattern(8 x 6) Full Black Pattern
White : 255Gray Black : 0Gray
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LM270WF3
Liquid Crystal Display
Product Specification
Table 3. LED bar Electrical characteristics
Values
Parameter Symbol Condition Unit Notes
Min. Typ. Max.
LED : 1
LED String Current Is - 110 120 mA 2
LED String Voltage Vs 51.0 54.4 57.8 V 3
Power Consumption PBar 22.44 23.94 25.43 Watt 4,6
LED Life Time LED_LT 30,000 - - Hrs 5
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 110 mA 100% duty current.
4. The specified power consumption is input LED bar power consumption at typical 110 mA 100% duty current.
5. 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 r 2 C.
6. The LED bar power consumption shown above does not include loss of external driver.
The used LED bar current is the LED typical current.
Min Power Consumption is calculated with PBar = Vs(Min.) x Is(Typ.) x Nstring
Max Power Consumption is calculated with PBar = Vbar(Max.) x Is(Typ) x Nstring
7. LED operating DC Forward Current must not exceed LED Max Ratings at 25 r 2 C.
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LM270WF3
Liquid Crystal Display
Product Specification
3-2. Interface Connections
This LCD module employs two kinds of interface connection, 51 pin connector and 41 pin connector are
used for the module electronics.
3-2-1. LCD Module
Table 4. Module Connector (CN1) Pin Configuration
- LCD Connector(CN1): IS050-C51B-C39-A(manufactured by UJU)
- Mating Connector : FI-R51HL(JAE) or compatible
No Symbol Description No Symbol Description
1 GND Ground 27 NC No Connection (BIT)
2 MST MST Option Enable 28 R2AN 2nd LVDS Channel Signal (A-)
3 PWM_OUT PWM Signal Output 29 R2AP 2nd LVDS Channel Signal (A+)
4 NC No Connection (SDA) 30 R2BN 2nd LVDS Channel Signal (B-)
5 NC No Connection (SCL) 31 R2BP 2nd LVDS Channel Signal (B+)
6 NC No Connection 32 R2CN 2nd LVDS Channel Signal (C-)
7 NC No Connection (DISM) 33 R2CP 2nd LVDS Channel Signal (C+)
8 NC No Connection 34 GND Ground
9 ODC_EN ODC Enable 35 R2CLKN 2nd LVDS Channel Clock Signal(-)
10 FPS_DET H: High Frame rate, L: Legacy 36 R2CLKP 2nd LVDS Channel Clock Signal(+)
11 GND Ground 37 GND Ground
12 R1AN 1st LVDS Channel Signal (A-) 38 R2DN 2nd LVDS Channel Signal (D-)
13 R1AP 1st LVDS Channel Signal (A+) 39 R2DP 2nd LVDS Channel Signal (D+)
14 R1BN 1st LVDS Channel Signal (B-) 40 GND Ground
15 R1BP 1st LVDS Channel Signal (B+) 41 NC No connection
16 R1CN 1st LVDS Channel Signal (C-) 42 NC No connection
17 R1CP 1st LVDS Channel Signal (C+) 43 GND Ground
18 GND Ground 44 GND Ground (AGP)
19 R1CLKN 1st LVDS Channel Clock Signal(-) 45 GND Ground
20 R1CLKP 1st LVDS Channel Clock Signal(+) 46 NC No connection
21 GND Ground 47 NC No connection
22 R1DN 1st LVDS Channel Signal (D-) 48 VLCD Power Supply +12.0V
23 R1DP 1st LVDS Channel Signal (D+) 49 VLCD Power Supply +12.0V
24 GND Ground 50 VLCD Power Supply +12.0V
25 NC No Connection 51 VLCD Power Supply +12.0V
26 NC No Connection
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LM270WF3
Liquid Crystal Display
Product Specification
Table 5. Module Connector (CN2) Pin Configuration
- LCD Connector(CN2): IS050-C41B-C39-A(manufactured by UJU)
- Mating Connector : FI-RE41HL(JAE) or compatible
No Symbol Description No Symbol Description
1 NC No connection 22 GND Ground
2 NC No connection 23 NC No connection
3 NC No connection 24 NC No connection
4 NC No connection 25 GND Ground
5 NC No connection 26 RA4N 4th LVDS Channel Signal (A-)
6 NC No connection 27 RA4P 4th LVDS Channel Signal (A+)
7 NC No connection 28 RB4N 4th LVDS Channel Signal (B-)
8 NC No connection 29 RB4P 4th LVDS Channel Signal (B+)
9 GND Ground 30 RC4N 4th LVDS Channel Signal (C-)
10 RA3N 3rd LVDS Channel Signal (A-) 31 RC4P 4th LVDS Channel Signal (C+)
11 RA3P 3rd LVDS Channel Signal (A+) 32 GND Ground
12 RB3N 3rd LVDS Channel Signal (B-) 33 RCLK4N 4th LVDS Channel Clock Signal(-)
13 RB3P 3rd LVDS Channel Signal (B+) 34 RCLK4P 4th LVDS Channel Clock Signal(+)
14 RC3N 3rd LVDS Channel Signal (C-) 35 GND Ground
15 RC3P 3rd LVDS Channel Signal (C+) 36 RD4N 4th LVDS Channel Signal (D-)
16 GND Ground 37 RD4P 4th LVDS Channel Signal (D+)
17 RCLK3N 3rd LVDS Channel Clock Signal(-) 38 GND Ground
18 RCLK3P 3rd LVDS Channel Clock Signal(+) 39 NC No connection
19 GND Ground 40 GND Ground
20 RD3N 3rd LVDS Channel Signal (D-) 41 GND Ground
21 RD3P 3rd LVDS Channel Signal (D+)
Figure 4. Module Connector Diagram
CN1 CN2 #1 #51 #1 #41
#1 #51 #1 #41
[Rear view of LCM]
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LM270WF3
Liquid Crystal Display
Product Specification
Note :
1. All GND (Ground) pins should be connected together to the LCD module's metal frame.
2. All VLCD (power input) pins should be connected together.
3. All Input levels of LVDS signals are based on the EIA 664 Standard.
4. Always all LVDS signal and clock input should be 4 channels and synchronized.
5. Specific pins (CN1 pin No. 4~8, 27, 44) are used for internal process of the LCD module manufacturing.
Leave these pins in condition that `No Connection'.
6. MST : MST option enable (Input), `L' : Disable, `H' : Enable
MST option : Left side image is applied to CN1, 1st & 2nd LVDS channel.
Right side image is applied to CN2, 3rd & 4th LVDS channel.
It should be tided up `L' or `H'.
7. PWM_OUT : Reference signal (Output) for synchronizing Vsync and Burst frequency of inverter to avoid
wavy noise, flickering, etc.
8. ODC_EN : ODC enable (Input), `L' : Disable, `H' : Enable
9. FPS_DET : Frame rate detection (Input), `L' : Under 50MHz, `H': Over 50MHz.
It should be tided up `L' or `H'.
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LM270WF3
Liquid Crystal Display
Product Specification
3-2-2. LED Interface
The LED interface connector is a model 10019HR-H06B manufactured by Yeonho.
The pin configuration for the connector is shown in the table below.
Table 6. LED connector pin configuration
Pin Symbol Description Notes
1 FB1 Channel1 Current Feedback FB1
2 FB2 Channel2 Current Feedback FB2
3 Vled LED Power Supply
4 Vled LED Power Supply
5 FB3 Channel3 Current Feedback FB3
6 FB4 Channel4 Current Feedback FB4
FIG. 5 Backlight connector view
Top view Side view
Insert 6
1
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LM270WF3
Liquid Crystal Display
Product Specification
3-3. LVDS characteristics
3-3-1. DC Specification
Description Symbol Min Max Unit Notes
LVDS Single end Voltage |VID| 200 600 mV -
LVDS Common mode Voltage VCM 1.1 1.4 V -
LVDS Input Voltage Range VIN 0.8 1.6 V -
Change in common mode Voltage VCM - 250 mV -
3-3-2. AC Specification
tCLK
LVDS Clock
LVDS Data
( fCLK =1/tCLK ) tSKEW tSKEW
tCLK
LVDS 1'st Clock
LVDS 2nd / 3rd / 4th Clock
tSKEW_CLK tSKEW_CLK
Description Symbol Min Max Unit Notes
LVDS Clock to Data Skew Margin tSKEW -1/7tc*(n+0.25) 1/7tc*(n+0.25) ps -
LVDS Clock to Clock Skew Margin tSKEW_CLK - 1/7 + 1/7 tCLK -
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LM270WF3
Liquid Crystal Display
Product Specification
3-3-3. LVDS data format (8bit, VESA)
1st LVDS Channel
tCLK
tCLK*4/7 tCLK*3/7
R1CLKP
R1CLKN
MSB R17/G17/B17
R1AP/N R11' R10' G10 R15 R14 R13 R12 R11 R10 G10"
R16/G16/B16
R15/G15/B15
R1BP/N G12' G11' B11 B10 G15 G14 G13 G12 G11 B11"
R14/G14/B14
R13/G13/B13
R1CP/N B13' B12' DE VSYNC HSYNC B15 B14 B13 B12 DE" R12/G12/B12
R11/G11/B11
R1DP/N R17' R16' X B17 B16 G17 G16 R17 R16 X" LSB R10/G10/B10
Previous (N-1)th cycle Current (N)th cycle Next (N+1)th cycle
2nd LVDS Channel
tCLK
tCLK*4/7 tCLK*3/7
R2CLKP
R2CLKN
MSB R27/G27/B27
R2AP/N R21' R20' G20 R25 R24 R23 R22 R21 R20 G20"
R26/G26/B26
R25/G25/B25
R2BP/N G22' G21' B21 B20 G25 G24 G23 G22 G21 B21"
R24/G24/B24
R23/G23/B23
R2CP/N B23' B22' DE VSYNC HSYNC B25 B24 B23 B22 DE" R22/G22/B22
R21/G21/B21
R2DP/N R27' R26' X B27 B26 G27 G26 R27 R26 X" LSB R20/G20/B20
Previous (N-1)th cycle Current (N)th cycle Next (N+1)th cycle
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LM270WF3
Liquid Crystal Display
Product Specification
3-3-3. LVDS data format (8bit, VESA)
3rd LVDS Channel
tCLK
tCLK*4/7 tCLK*3/7
R3CLKP
R3CLKN
MSB R37/G37/B37
R3AP/N R31' R30' G30 R35 R34 R33 R32 R31 R30 G30"
R36/G36/B36
R35/G35/B35
R3BP/N G32' G31' B31 B30 G35 G34 G33 G32 G31 B31"
R34/G34/B34
R33/G33/B33
R3CP/N B33' B32' DE VSYNC HSYNC B35 B34 B33 B32 DE" R32/G32/B32
R31/G31/B31
R3DP/N R37' R36' X B37 B36 G37 G36 R37 R36 X" LSB R30/G30/B30
Previous (N-1)th cycle Current (N)th cycle Next (N+1)th cycle
4th LVDS Channel
tCLK
tCLK*4/7 tCLK*3/7
R4CLKP
R4CLKN
MSB R47/G47/B47
R4AP/N R41' R40' G40 R45 R44 R43 R42 R41 R40 G40"
R46/G46/B46
R45/G45/B45
R4BP/N G42' G41' B41 B40 G45 G44 G43 G42 G41 B41"
R44/G44/B44
R43/G43/B43
R4CP/N B43' B42' DE VSYNC HSYNC B45 B44 B43 B42 DE" R42/G42/B42
R41/G41/B41
R4DP/N R47' R46' X B47 B46 G47 G46 R47 R46 X" LSB R40/G40/B40
Previous (N-1)th cycle Current (N)th cycle Next (N+1)th cycle
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Product Specification
Table 7. Required signal assignment for Flat Link(NS:DS90CF383) transmitter
Pin # Pin Name Require Signal Pin # Pin Name Require Signal
1 VCC Power Supply for TTL Input 29 GND Ground pin for TTL
2 D5 TTL Input (R7) 30 D26 TTL Input (DE)
3 D6 TTL Input (R5) 31 TX CLKIN TTL Level clock Input
4 D7 TTL Input (G0) 32 PWR DWN Power Down Input
5 GND Ground pin for TTL 33 PLL GND Ground pin for PLL
6 D8 TTL Input (G1) 34 PLL VCC Power Supply for PLL
7 D9 TTL Input (G2) 35 PLL GND Ground pin for PLL
8 D10 TTL Input (G6) 36 LVDS GND Ground pin for LVDS
9 VCC Power Supply for TTL Input 37 TxOUT3 Positive LVDS differential data output 3
10 D11 TTL Input (G7) 38 TxOUT3 Negative LVDS differential data output 3
11 D12 TTL Input (G3) 39 TX CLKOUT Positive LVDS differential clock output
12 D13 TTL Input (G4) 40 TX CLKOUT Negative LVDS differential clock output
13 GND Ground pin for TTL 41 TX OUT2 Positive LVDS differential data output 2
14 D14 TTL Input (G5) 42 TX OUT2 Negative LVDS differential data output 2
15 D15 TTL Input (B0) 43 LVDS GND Ground pin for LVDS
16 D16 TTL Input (B6) 44 LVDS VCC Power Supply for LVDS
17 VCC Power Supply for TTL Input 45 TX OUT1 Positive LVDS differential data output 1
18 D17 TTL Input (B7) 46 TX OUT1 Negative LVDS differential data output 1
19 D18 TTL Input (B1) 47 TX OUT0 Positive LVDS differential data output 0
20 D19 TTL Input (B2) 48 TX OUT0 Negative LVDS differential data output 0
21 GND Ground pin for TTL Input 49 LVDS GND Ground pin for LVDS
22 D20 TTL Input (B3) 50 D27 TTL Input (R6)
23 D21 TTL Input (B4) 51 D0 TTL Input (R0)
24 D22 TTL Input (B5) 52 D1 TTL Input (R1)
25 D23 TTL Input (RSVD) 53 GND Ground pin for TTL
26 VCC Power Supply for TTL Input 54 D2 TTL Input (R2)
27 D24 TTL Input (HSYNC) 55 D3 TTL Input (R3)
28 D25 TTL Input (VSYNC) 56 D4 TTL Input (R4)
Notes : Refer to LVDS Transmitter Data Sheet for detail descriptions.
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LM270WF3
Liquid Crystal Display
Product Specification
3-4. Signal Timing Specifications
This is signal timing required at the input of the Module connector. All of the interface signal timing should be
satisfied with the following specifications for it's proper operation.
Table 8. Timing Table
Parameter Symbol Min Typ Max Unit Notes
Period tCLK 10.0 27.8 33.3 ns GUI typ. :
DCLK
Frequency fCLK 30 36 100 MHz 144MHz@60Hz
Horizontal Valid tHV 480 480 480
Horizontal tCLK
H Period Total tHP 520 544 560
Hsync Frequency fH 64 66 192 kHz
Vertical Valid tVV 1080 1080 1080
tHP
Vertical V Period Total tVP 1090 1100 1733
Vsync Frequency fV 50 60 122 Hz
DE DE Setup Time tSI 4 - -
ns For DCLK
(Data Enable) DE Hold Time tHI 4 - -
Data Setup Time tSD 4 - -
Data ns For DCLK
Data Hold Time tHD 4 - -
Note:
1. DE Only mode operation.
The input of Hsync and Vsync signal does not effect on LCD normal operation.
2. The performance of the electro-optical characteristics may be influenced by variance of the
vertical refresh rates.
3. Horizontal period should be even.
4. Timing parameter's combination should be under DCLK specification.
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Liquid Crystal Display
Product Specification
3-5. Signal Timing Waveforms
[ DCLK , DE, DATA waveforms]
tCLK
Dclk
tSD tHD Valid
Invalid Invalid
Data
tSI tHI
DE(Data Enable)
[ Hsync, Vsync, DE waveforms ]
tHP
Hsync tWH
tHBP tHV tHFP
DE(Data Enable)
tVP
tWV
Vsync
tVBP tVV tVFP
DE(Data Enable)
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Product Specification
3-6. 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 9. Color Data Reference
Input Color Data
RED GREEN BLUE
Color
MSB LSB MSB LSB 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
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
Basic 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
Color 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 ... ... ... ...
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
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
Ver. 0.5 Aug., 18. 2010 18 / 31
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LM270WF3
Liquid Crystal Display
Product Specification
3-7. Power Sequence
90% 90%
Power Supply for LCD 10% 10%
VLCD
0V
T1 T2 T5 T7
Interface Signal Valid data
VI
T8 T9
Option signal
(ODC_EN ,FPS_DET, MST)
T3 T4
Power Supply for LED LED on
LED OFF LED OFF
Table 10. Power Sequence
Values
Parameter Units
Min Typ Max
T1 0.5 - 10 ms
T2 0.01 - 50 ms
T3 500 - - ms
T4 200 - - ms
T5 0.01 - 50 ms
T7 500 - ms
T8 0 < T8 < T2 ms
T9 0 < T9 < T5 ms
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 VLCD to 0V.
3. LED power must be turn on after power supply VLCD and interface signal are valid.
Ver. 0.5 Aug., 18. 2010 19 / 31
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LM270WF3
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 ) and T equal to 0 and aperture 1 degree.
Figure. 6 presents additional information concerning the measurement equipment and method.
Figure. 6 Optical Characteristic Measurement Equipment and Method
Pritchard 880 or
LCD Module
Optical Stage(x,y) equivalent
50cm
Table 11. Optical Characteristics (Ta=25 C, VLCD=12.0V, fV=60Hz DCLK=144MHz, IBL=110mA)
Values
Parameter Symbol Units Notes
Min Typ Max
Contrast Ratio CR 700 1,000 - 1
Surface Luminance, white LWHITE 320 400 - cd/m2 2
Luminance Variation G WHITE 75 - - % 3
Rise Time TrR - 1 4 ms 4
Response Time Decay Time TrD - 4 8 ms 4
Gray to Gray TGTG - 3 6 ms 5
Rx 0.642
RED
Ry 0.335
Color Coordinates Gx 0.291
GREEN
[CIE1931] Gy Typ 0.636 Typ
(By PR650) Bx -0.03 0.153 +0.03
BLUE
By 0.049
Wx 0.313
WHITE
Wy 0.329
Viewing Angle (CR>10)
x axis, right(I=0 ) Tr 70 85 - Degree 6
x axis, left (I=180 ) Tl 70 85 -
y axis, up (I=90 ) Tu 60 75 -
y axis, down (I=270 ) Td 70 85 -
Gray Scale - 2.2 - 7
Crosstalk - - 1.5 % 8
Ver. 0.5 Aug., 18. 2010 20 / 31
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LM270WF3
Liquid Crystal Display
Product Specification
Notes :
1. Contrast ratio (CR) is defined mathematically as :
It is measured at center point (1)
Surface luminance with all white pixels
Contrast ratio = ---------------------------------------------------------
Surface luminance with all black pixels
2. Surface luminance is the luminance value at center 1 point (1) across the LCD surface 50cm
from the surface with all pixels displaying white.
For more information see Figure 7.
3. The variation in surface luminance , G WHITE is defined as :
Minimum (P1,P2 .....P9)
G WHITE = --------------------------------------------- x 100 (%)
Maximum (P1,P2 .....P9)
For more information see Figure 7.
Figure 7. Luminance measuring point
H H
H/2 H/10 H/2
2 3 4 V/2
V/2
V
V 5 6
1
V/10 7 8 9
@ H,V : Active Area
Ver. 0.5 Aug., 18. 2010 21 / 31
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