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LP121WX3
Liquid Crystal Display
Product Specification
SPECIFICATION
FOR
APPROVAL
( ) Preliminary Specification
( ) Final Specification
Title 12.1" WXGA TFT LCD
Customer LENOVO SUPPLIER LG Display Co., Ltd.
MODEL *MODEL LP121WX3
Suffix TLC1
*When you obtain standard approval,
please use the above model name without suffix
APPROVED BY SIGNATURE APPROVED BY SIGNATURE
G. J. Kwon / G.Manager
/
REVIEWED BY
/
J. S. Park / Manager
/ PREPARED BY
S. Y. Kim / Engineer
T. S. Yun / Engineer
Please return 1 copy for your confirmation with Products Engineering Dept.
your signature and comments. LG Display Co., Ltd
Ver. 0.6 Jul. 07, 2009 1 / 32
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LP121WX3
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
3-1 ELECTRICAL CHARACTREISTICS 6
3-2 INTERFACE CONNECTIONS 8
3-3 LVDS SIGNAL TIMING SPECIFICATIONS 9
3-4 SIGNAL TIMING SPECIFICATIONS 11
3-5 SIGNAL TIMING WAVEFORMS 11
3-6 COLOR INPUT DATA REFERNECE 12
3-7 POWER SEQUENCE 13
4 OPTICAL SFECIFICATIONS 14
5 MECHANICAL CHARACTERISTICS 17
6 RELIABLITY 24
7 INTERNATIONAL STANDARDS
7-1 SAFETY 25
7-2 EMC 25
8 PACKING
8-1 DESIGNATION OF LOT MARK 26
8-2 PACKING FORM 26
9 PRECAUTIONS 27
A APPENDIX. Enhanced Extended Display Identification Data 29
Ver. 0.6 Jul. 07, 2009 2 / 32
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LP121WX3
Liquid Crystal Display
Product Specification
RECORD OF REVISIONS
EDID
Revision No Revision Date Page Description
ver
0.0 Dec. 24. 2008 - First Draft (Preliminary Specification) 0.0
0.1 Jun. 04. 2009 4 Update the General Description Block Diagram 0.1
6 Update the Electrical Characteristics.( Change the Spec.)
7 Update the Pin Map Description.
10 Add 50Hz Timing Table
13 Update the Optical Characteristics.
16 Update the Mechanical Characteristics.
17 Update the Mechanical Drawing.
28~30 Update the EDID Data (C0 AC)
0.2 Jun. 12. 2009 6 Update the LCD Driver Specification 0.1
7 Update the LCD connector Description
12 Update the Power Sequence
26 Update the Label Description
0.3 Jun. 22. 2009 17~19 Update the Mechanical Drawing. 0.1
0.4 Jun. 25. 2009 18 Update the Mechanical Drawing. 0.1
0.5 Jul. 01. 2009 12 Update the Power Sequence. 0.1
0.6 Jul. 07. 2009 12 Update the Power Sequence. 0.1
16 Update the Mechanical Characteristics.
Ver. 0.6 Jul. 07, 2009 3 / 32
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LP121WX3
Liquid Crystal Display
Product Specification
1. General Description
The LP121WX3 is a Color Active Matrix Liquid Crystal Display with an integral White LED backlight system.
The matrix employs a-Si Thin Film Transistor as the active element. It is a transmissive type display
operating in the normally white mode. This TFT-LCD has 12.1 inches diagonally measured active display
area with WXGA resolution(1280 horizontal by 800 vertical 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 6-bit gray scale signal for each dot, thus, presenting a palette of more
than 262,144 colors.
The LP121WX3 has been designed to apply the interface method that enables low power, high speed, low
EMI.
The LP121WX3 is intended to support applications where thin thickness, low power are critical factors and
graphic displays are important. In combination with the vertical arrangement of the sub-pixels, the
LP121WX3 characteristics provide an excellent flat display for office automation products such as Notebook
PC.
LVDS &
Source Driver Circuit
Timing Control
(T-con) Block
POWER
VCC TFT-LCD Panel
BLOCK
(1280 x 800)
EDID
BLOCK
VLED LED Driver VOUT_LED LED Backlight Ass'y
LED Driver
BL_ON
PWM Block FB1~4
Block
General Features
Active Screen Size 12.1 inches diagonal
Outline Dimension 275.8 (H) 178.1 (V) 5.3(D, max) mm
Pixel Pitch 0.204 mm 0.204 mm
Pixel Format 1280 horiz. By 800 vert. Pixels RGB strip arrangement
Color Depth 6-bit, 262,144 colors
Luminance, White 220 cd/m2(Typ.5 point)
Power Consumption Total 3.8 W (Typ.) Logic: 0.8W (Typ.@Mosaic), B/L: 3.0W (Typ.@VLED:12V)
Weight 285(Max.)
Display Operating Mode Transmissive mode, normally white
Surface Treatment Anti-glare treatment of the front polarizer (ARC150T)
RoHS Comply Yes
Ver. 0.6 Jul. 07, 2009 4 / 32
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LP121WX3
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
Values
Parameter Symbol Units Notes
Min Max
Power Input Voltage VCC -0.3 4.0 Vdc at 25 r 5qC
Operating Temperature TOP 0 50 qC 1
Storage Temperature HST -20 60 qC 1
Operating Ambient Humidity HOP 10 90 %RH 1
Storage Humidity HST 10 90 %RH 1
Note : 1. Temperature and relative humidity range are shown in the figure below.
Wet bulb temperature should be 39qC Max, and no condensation of water.
90% 80%
60 60%
Wet Bulb 50
Humidity[(%)RH]
Temperature [ ] Storage
40 40%
30 Operation
20
20%
10
0
10%
-20 0 10 20 30 40 50 60 70 80
Dry Bulb Temperature [ ]
Ver. 0.6 Jul. 07, 2009 5 / 32
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LP121WX3
Liquid Crystal Display
Product Specification
3. Electrical Specifications
3-1. Electrical Characteristics
The LP121WX3 requires two power inputs. The first logic is employed to power the LCD electronics and to
drive the TFT array and liquid crystal. The second backlight is the input about LED BL.with LED Driver.
Table 2. ELECTRICAL CHARACTERISTICS
Values
Parameter Symbol Unit Notes
Min Typ Max
MODULE :
Power Supply Input Voltage VCC 3.0 3.3 3.6 VDC
Power Supply Input Current ICC Mosaic - 250 285 mA 1
Power Consumption Pc Mosaic - 0.8 0.9 W
LVDS Impedance ZLVDS 90 100 110 2
LED Backlight:
Operating Current per string ILED 5.0 20.0 21.0 mA 3
Operating Voltage per string VLED - 32.0 34.0 V
Power Consumption PBL 3.0 3.4 W 3
Life Time 12,000 Hrs 4
LED Driver
Power Supply Input Voltage VBL+ 7.0 12.0 21.0 V
Frequency FPWM 200 1000 Hz 5
PWM Dimming (Duty) Ratio Don 1.5 - 100 % 6
PWM High Voltage Level VPWM_H 3.0 - 5.3 V
PWM Low Voltage Level VPWM_L 0 - 0.5 V
LED_EN High Voltage VLED_EN_H 3.0 - 5.3 V
LED_EN Low Voltage VLED_EN_L 0 - 0.5 V
Note)
1. The specified current and power consumption are under the Vcc = 3.3V , 25 , fv = 60Hz condition
whereas Mosaic pattern is displayed and fv is the frame frequency.
2. This impedance value is needed to proper display and measured form
LVDS Tx to the mating connector.
3. The specified LED current and power consumption are under the Vled = 12.0V , 25 , Dimming of Max
luminance whereas White pattern is displayed and fv is the frame frequency.
4. The life time is determined as the time at which brightness of LCD is 50% compare to that of minimum
value at Table. 7. These LED backlight has 4 strings on it and the typical current of LED's string is
base on 20mA
5. This Spec. is not effective at 100% dimming ratio as an exception because it has DC level equivalent
to 0Hz. In spite of acceptable range as defined, the PWM Frequency should be fixed and stable for
more consistent brightness control at any specific level desired.
6. LGD LED Driver guarantee 6.0% at PWM minimum dimming ratio. Minimum dimming ratio 1.5% is based
on Lenovo's.
Ver. 0.6 Jul. 07, 2009 6 / 32
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LP121WX3
Liquid Crystal Display
Product Specification
3-2. Interface Connections
This LCD employs one interface connections, a 30 pin connector is used for the module electronics interface
and the integral backlight system.
The electronics interface connector is a model FI-XB30SL-HF10 manufactured by JAE.
Table 3. MODULE CONNECTOR PIN CONFIGURATION (CN1)
Pin Symbol Description Notes
1 NC No Connection
2 VCC Power Supply, 3.3V (typical)
1, Interface chips
3 VCC Power Supply, 3.3V (typical) 1.1 LCD : SW, SW0611A (LCD Controller)
including LVDS Receiver
4 V EEDID DDC 3.3V power
1.2 System : THC63LVD823A or equivalent
5 Reserved Reserved for supplier test point * Pin to Pin compatible with LVDS
6 Clk EEDID DDC Clock 2. Connector
2.1 LCD : FI-XB30SL-HF10, JAE
7 DATA EEDID DDC Data
8 RIN 0- Negative LVDS differential data input
2.2 Connector pin arrangement
9 RIN 0+ Positive LVDS differential data input
10 GND Ground
11 RIN 1- Negative LVDS differential data input
12 RIN 1+ Positive LVDS differential data input
13 GND Ground [LCD Module Rear View]
14 RIN 2- Negative LVDS differential data input
15 RIN 2+ Positive LVDS differential data input
16 GND Ground
17 CLKIN- Negative LVDS differential clock input
18 CLKIN+ Positive LVDS differential clock input
19 GND Ground
20 GND Ground
21 VBL- LED Ground
22 VBL- LED Ground
23 VBL- LED Ground
24 NC No Connection
25 VLED LED Power Supply 7V-21V
26 VLED LED Power Supply 7V-21V
27 VLED LED Power Supply 7V-21V
28 PWM PWM for luminance control (200Hz ~ 1000Hz)
29 LED_EN Backlight On/Off Control
30 NC No Connection
Ver. 0.6 Jul. 07, 2009 7 / 32
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LP121WX3
Liquid Crystal Display
Product Specification
3-3. LVDS Signal Timing Specifications
3-3-1. DC Specification
Symb
Description Min Max Unit Notes
ol
LVDS Differential Voltage |VID| 100 600 mV -
LVDS Common mode Voltage VCM 0.6 1.8 V -
LVDS Input Voltage Range VIN 0.3 2.1 V -
3-3-2. AC Specification
Description Symbol Min Max Unit Notes
85MHz > Fclk
tSKEW - 400 + 400 ps
65MHz
LVDS Clock to Data Skew Margin
65MHz > Fclk
tSKEW - 600 + 600 ps
25MHz
LVDS Clock to Clock Skew Margin (Even
tSKEW_EO - 1/7 + 1/7 Tclk -
to Odd)
Maximum deviation
FDEV - 3 % -
of input clock frequency during SSC
Maximum modulation frequency
FMOD - 200 KHz -
of input clock during SSC
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LP121WX3
Liquid Crystal Display
Product Specification
< Clock skew margin between channel >
Freq.
Fmax
Fcenter
Fmin
Time
< Spread Spectrum >
3-3-3. Data Format
1) LVDS 1 Port
RCLK+
RA+/- R3 R2 R1 R0 G0 R5 R4 R3 R2 R1 R0 G0 R5 R4
RB+/- G4 G3 G2 G1 B1 B0 G5 G4 G3 G2 G1 B1 B0 G5
RC+/- B5 B4 B3 B2 DE VSYNC HSYNC B5 B4 B3 B2 DE VSYNC HSYNC
RD+/- G7 G6 R7 R6 X B7 B6 G7 G6 R7 R6 X B7 B6
Previous (N-1)th Cycle Current (Nth ) Cycle Next (N+1)th Cycle
< LVDS Data Format >
Ver. 0.6 Jul. 07, 2009 9 / 32
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LP121WX3
Liquid Crystal Display
Product Specification
3-4. Signal Timing Specifications
This is the signal timing required at the input of the User connector. All of the interface signal timing should be
satisfied with the following specifications and specifications of LVDS Tx/Rx for its proper operation.
Table 4. TIMING TABLE
ITEM Symbol Min Typ Max Unit Note(50Hz)
DCLK Frequency fCLK 66.9 69.3 73.9 MHz 57.79
Period Thp 1376 1408 1480 1408
Hsync Width tWH 24 32 40 tCLK 32
Width-Active tWHA 1280 1280 1280 1280
Period tVP 810 820 832 820
Vsync
Width tWV 2 4 6 tHP 4
Width-Active tWVA 800 800 800 800
Horizontal back porch tHBP 56 72 96 72
tCLK
Data Horizontal front porch tHFP 16 24 64 24
Enable Vertical back porch tVBP 6 12 18 12
tHP
Vertical front porch tVFP 2 4 8 4
Appendix) All reliabilities are specified for timing specification based on refresh rate of 60Hz.
However, LP121WX3 has a good actual performance even at lower refresh rate (e.g. 50Hz)
for power saving mode, whereas LP121WX3 is secured only for function under lower refresh rate.
60Hz at Normal mode, 50Hz at Power save mode. Don't care Flicker level (power save mode).
Condition : VCC =3.3V
3-5. Signal Timing Waveforms
High: 0.7VCC
Data Enable, Hsync, Vsync
Low: 0.3VCC
tCLK 0.5 Vcc
DCLK
tHP
Hsync t
WH
tHBP tWHA tHFP
Data Enable
tVP
tWV
Vsync tVFP
tVBP tWVA
Data Enable
Ver. 0.6 Jul. 07, 2009 10 / 32
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LP121WX3
Liquid Crystal Display
Product Specification
3-6. Color Input Data Reference
The brightness of each primary color (red,green and blue) is based on the 6-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
RED GREEN BLUE
Color
MSB LSB MSB LSB MSB LSB
R5 R4 R3 R2 R1 R0 G5 G4 G3 G2 G1 G0 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
Red 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0
Green 0 0 0 0 0 0 1 1 1 1 1 1 0 0 0 0 0 0
Basic Blue 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1
Color Cyan 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1
Magenta 1 1 1 1 1 1 0 0 0 0 0 0 1 1 1 1 1 1
Yellow 1 1 1 1 1 1 1 1 1 1 1 1 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
RED (00) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
RED (01) 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0
RED ... ... ... ...
RED (62) 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0
RED (63) 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0
GREEN (00) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
GREEN (01) 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0
GREEN ... ... ... ...
GREEN (62) 0 0 0 0 0 0 1 1 1 1 1 0 0 0 0 0 0 0
GREEN (63) 0 0 0 0 0 0 1 1 1 1 1 1 0 0 0 0 0 0
BLUE (00) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
BLUE (01) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
BLUE ... ... ... ...
BLUE (62) 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 0
BLUE (63) 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1
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LP121WX3
Liquid Crystal Display
Product Specification
3-7. Power Sequence
90% 90%
Power Supply Input
VCC
0V 10% 10%
T3 T7 T4
T1 T2 Valid Data
Interface Signal, Vi
LVDS
0V
T5 3.0V 3.0V T6
LED on/off control Signal
0V (Off)
LED_EN
T9 T10
Dimming control signal Valid Data
Of LED BL 0V (Low)
PWM
T8 T11
90%
LED input Voltage
VLED 0V
Table 6. POWER SEQUENCE TABLE
Logic Value LED Value
Units Units
Parameter Min. Typ. Max. Parameter Min. Typ. Max.
T1 0 - 10 ms T8 0 - - ms
T2 0 - 50 ms T9 0 - - ms
T3 0 - - ms T10 0 - - ms
T4 150 - - ms T11 0 - - ms
T5 200 - - ms
T6 0 - - ms
T7 0 - 10 ms
Note)
1. Do not insert the mating cable when system turn on.
2. Valid Data have to meet "3-3. LVDS Signal Timing Specifications"
3. LVDS, LED_EN and PWM need to pull-down condition on invalid status.
4. LGD recommend the rising sequence of VLED after the Vcc and valid status of LVDS turn on.
5. LGD recommend the T1:0.5ms,T8:10ms,T11:10ms at power sequence.
T1,T8,T11:0ms is based on Lenovo's.
Ver. 0.6 Jul. 07, 2009 12 / 32
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LP121WX3
Liquid Crystal Display
Product Specification
4. Optical Specification
Optical characteristics are determined after the unit has been `ON' and stable for approximately 30 minutes in
a dark environment at 25qC. The values specified are at an approximate distance 50cm from the LCD surface
at a viewing angle of ) and 4 equal to 0q.
FIG. 1 presents additional information concerning the measurement equipment and method.
FIG. 1 Optical Characteristic Measurement Equipment and Method
LCD Module Pritchard 880 or
Optical Stage(x,y)
equivalent
50cm
Table 7. OPTICAL CHARACTERISTICS
Ta=25qC, VCC=3.3V, fV=60Hz, fCLK= 69.3MHz, ILED= 20.0mA
Values
Parameter Symbol Units Notes
Min Typ Max
Contrast Ratio CR - 300 - 1
Surface Luminance, white LWH 185 220 - cd/m2 2
Luminance Variation (5point) G WHITE 70 - - %
3
Luminance Variation (13point) G WHITE 60 - - %
Response Time TrR+ TrD 16 ms 4
Color Coordinates
RED RX 0.562 0.592 0.622
RY 0.321 0.351 0.381
GREEN GX 0.304 0.334 0.364
GY 0.519 0.549 0.579
BLUE BX 0.124 0.154 0.184
BY 0.100 0.130 0.160
WHITE WX 0.283 0.313 0.343
WY 0.299 0.329 0.359
Viewing Angle 5
x axis, right()=0q) 4r 40 45 - degree
x axis, left ()=180q) 4l 40 45 - degree
y axis, up ()=90q) 4u 10 15 - degree
y axis, down ()=270q) 4d 30 35 - degree
Gray Scale 6
Ver. 0.6 Jul. 07, 2009 13 / 32
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LP121WX3
Liquid Crystal Display
Product Specification
Note)
1. Contrast Ratio(CR) is defined mathematically as
Surface Luminance with all white pixels
Contrast Ratio =
Surface Luminance with all black pixels
2. Surface luminance is the average of 5 point across the LCD surface 50cm from the surface with
all pixels displaying white. For more information see FIG 1.
LWH = Average(L1,L2, ... L5)
3. The variation in surface luminance , The panel total variation (G WHITE) is determined by measuring LN
at each test position 1 through 13 and then defined as followed numerical formula.
For more information see FIG 2.
Maximum(L1,L2, ... L13)
G WHITE =
Minimum(L1,L2, ... L13)
4. Response time is the time required for the display to transition from white to black (rise time, TrR) and
from black to white(Decay Time, TrD). For additional information see FIG 3.
5. Viewing angle is the angle at which the contrast ratio is greater than 10. The angles are determined
for the horizontal or x axis and the vertical or y axis with respect to the z axis which is normal to the
LCD surface. For more information see FIG 4.
6. Gray scale specification * fV = 60Hz
Gray Level Luminance [%] (Typ)
L0 0.22
L7 2.77
L15 8.65
L23 16.4
L31 25.4
L39 39.3
L47 57.2
L55 77.9
L63 100
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LP121WX3
Liquid Crystal Display
Product Specification
FIG. 2 Luminance
H
A D
L6 L7 L8 H,V : ACTIVE AREA
C
A : H/4 mm
B : V/4 mm
L2 L3 C : 10 mm
D : 10 mm
B
POINTS : 13 POINTS
V
L9 L1 L10
Center Point
L4 L5
L11 L12 L13
FIG. 3 Response Time
The response time is defined as the following figure and shall be measured by switching the input signal
for "black" and "white".
TrR TrD
%
100
90
Optical
Response
10
0 white white
black
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LP121WX3
Liquid Crystal Display
Product Specification
5. Mechanical Characteristics
The contents provide general mechanical characteristics for the model LP121WX3. In addition the figures
in the next page are detailed mechanical drawing of the LCD.
Horizontal 275.8 r 0.5mm
Outline Dimension Vertical 178.1 r 0.5mm
Thickness 5.3 (Max)
Horizontal 266.50 r 0.5mm
Bezel Area
Vertical 166.6 r 0.5mm
Horizontal 260.93 r 0.3mm
Active Display Area
Vertical 163.08 r 0.3mm
Weight 285g(Max)
Surface Treatment Anti-glare treatment of the front polarizer
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LP121WX3
Liquid Crystal Display
Product Specification
Note) Unit:[mm], General tolerance: r 0.5mm
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LP121WX3
Liquid Crystal Display
Product Specification
Note) Unit:[mm], General tolerance: r 0.5mm
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LP121WX3
Liquid Crystal Display
Product Specification
[ DETAIL DESCRIPTION OF SIDE MOUNTING SCREW ]
* Screw Length(A) : Max : 1.8, Min : 1.5
* Screw Depth(B) : Min 1.8
* Screw Torque : 2.0~2.3kgf.cm
(Measurement Gauge :Torque Meter)
Notes : 1. Screw plated through the method of non-electrolytic nickel plating is preferred
to reduce possibility that results in vertical and/or horizontal line defect due to
the conductive particles from screw surface.
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LP121WX3
Liquid Crystal Display
Product Specification
LGD Proposal for system cover design.(Appendix)
Gap check for securing the enough gap between LCM
1
and System cover.
1.Rear side of LCM is sensitive against external stress,and previous check
about interference is highly needed.
Define 2.In case there is something from system cover comes into the boundary
above,mechanical interference may cause the FOS defects.
(Eg:Ripple,White spot..)
2 Check if antenna cable is sufficiently apart from T-CON of LCD Module.
Define
NO GOOD GOOD
1.If system antenna is overlapped with T-CON,it might be cause the noise.
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LP121WX3
Liquid Crystal Display
Product Specification
LGD Proposal for system cover design.
Gap check for securing the enough gap between LCM
3
and System hinge.
1.At least 2.0mm of gap needs to be secured to prevent the shock
Define related defects.
2."L" type of hinge is recommended than "I" type under shock test.
4 Checking the path of the System wire.
#6 #5 #4 #3 #2 #1
Good Ok Bad
1.COF area needs to be handled with care.
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