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LP156WH4
Liquid Crystal Display
Product Specification
SPECIFICATION
FOR
APPROVAL
( ) Preliminary Specification
( ) Final Specification
Title 15.6" HD TFT LCD
Customer LENOVO SUPPLIER LG Display Co., Ltd.
MODEL *MODEL LP156WH4
Suffix TLN1
*When you obtain standard approval,
please use the above model name without suffix
APPROVED BY SIGNATURE APPROVED BY SIGNATURE
C. I. Kim / S.Manager
/
REVIEWED BY
B. T. Jang / Manager
/
B. D. Jun / Manager
/ PREPARED BY
C. H. Yun / Engineer
C.K.D / Engineer
Please return 1 copy for your confirmation with Products Engineering Dept.
your signature and comments. LG Display Co., Ltd
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LP156WH4
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 6-7
3-2 INTERFACE CONNECTIONS 8
3-3 LVDS SIGNAL TIMING SPECIFICATION 9-10
3-3 SIGNAL TIMING SPECIFICATIONS 11
3-4 SIGNAL TIMING WAVEFORMS 11
3-5 COLOR INPUT DATA REFERNECE 12
3-6 POWER SEQUENCE 13
4 OPTICAL SFECIFICATIONS 14-16
5 MECHANICAL CHARACTERISTICS 17-20
A APPENDIX. LPL PROPOSAL FOR SYSTEM COVER DESIGN 21-23
6 RELIABLITY 24
7 INTERNATIONAL STANDARDS
7-1 SAFETY 25
7-2 EMC 25
7-3 ENVIRONMENT 25
8 PACKING
8-1 DESIGNATION OF LOT MARK 26
8-2 PACKING FORM 26
8-3 LABEL DESCRIPTION 27
9 PRECAUTIONS 28-29
A APPENDIX. Enhanced Extended Display Identification Data 30-32
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LP156WH4
Liquid Crystal Display
Product Specification
RECORD OF REVISIONS
EDID
Revision No Revision Date Page Description
ver
0.0 Jul. 21, 2011 - First Draft (Preliminary Specification) 0.0
0.1 Aus. 31. 2011 30-32 EDID Update 0.0
0.2 Oct. 12. 2011 14 Update Color coordinates 0.0
15 Update scale -
18-19 Update LCM Drawing -
27 Update Label drawing -
30-32 EDID Update -
1.0 Jan. 05. 2012 15 Update Gray scale 1.0
30-32 EDID Update -
- Final Draft -
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LP156WH4
Liquid Crystal Display
Product Specification
1. General Description
The LP156WH4 is a Color Active Matrix Liquid Crystal Display with an integral 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 15.6 inches diagonally measured active display area with HD
resolution (1366 horizontal by 768 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 LP156WH4 has been designed to apply the interface method that enables low power, high
speed, low EMI. The LP156WH4 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 LP156WH4 characteristics provide an excellent flat display for office automation products such
as Notebook PC.
1 1366
EEPROM Block
EEPROM Block
for EDID
for EDID
TFT-LCD Panel
User connector
LVDS Timing Control
Timing Control (HD, GIP, TN)
1port Block
Block
EP
I
768
DVCC CLKs
Power AVCC, AVDD
40 VCC Power
VGH, VGL, GMA
Source Driver
Block
Pin
Block (Bottom Bent)
GIP CLKs, DSC
VLED LED Driver
LED Driver VOUT_LED
LED_EN FB1~4
LED Backlight Ass'y
PWM
Block
Block
Control & Data Power EDID signal & Power
General Features
Active Screen Size 15.6 inches diagonal
Outline Dimension 359.3(H, typ) 209.5(V, typ) 5.5(D,max) [mm]
Pixel Pitch 0.252mm 0.252 mm
Pixel Format 1366 horiz. By 768 vert. Pixels RGB strip arrangement
Color Depth 6-bit, 262,144 colors
Luminance, White 220 cd/m2(Typ.5 point @ PWM Duty = 100%)
Power Consumption Total 4.3 W(Typ.) Logic : 0.7W (Typ.@ Mosaic), B/L : 3.6W (Typ.@ VLED 12V )
Weight 420g (Max.)
Display Operating Mode Transmissive mode, normally white
Surface Treatment Glare treatment of the front polarizer
RoHS Comply Yes
BFR / PVC / As Free Yes for all
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LP156WH4
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 [ ]
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LP156WH4
Liquid Crystal Display
Product Specification
3. Electrical Specifications
3-1. Electrical Characteristics
The LP156WH4 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
LOGIC :
Power Supply Input Voltage VCC 3.0 3.3 3.6 V 1
Power Supply Input Current Mosaic ICC - 220 255 mA 2
Power Consumption PCC - 0.7 0.8 W 2
Power Supply Inrush Current ICC_P - - 1500 mA 3
LVDS Impedance ZLVDS 90 100 110 4
BACKLIGHT : ( with LED Driver)
LED Power Input Voltage VLED 7.0 12.0 21.0 V 5
LED Power Input Current ILED - 300 325 mA 6
LED Power Consumption PLED - 3.6 3.9 W 6
LED Power Inrush Current ILED_P - - 1500 mA 7
PWM Duty Ratio 1 - 100 % 8
PWM Jitter - 0 - 0.2 % 9
PWM Impedance ZPWM 20 40 60 k
PWM Frequency FPWM 150 - 1000 Hz 10
PWM High Level Voltage VPWM_H 2.2 - 5.3 V
PWM Low Level Voltage VPWM_L 0 - 0.3 V
LED_EN Impedance ZPWM 20 40 60 k
LED_EN High Voltage VLED_EN_H 2.2 - 5.3 V
LED_EN Low Voltage VLED_EN_L 0 - 0.3 V
Life Time 12,000 - - Hrs 11
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LP156WH4
Liquid Crystal Display
Product Specification
Note)
1. The measuring position is the connector of LCM and the test conditions are under 25 , fv = 60Hz,
Black pattern.
2. The specified Icc current and power consumption are under
the Vcc = 3.3V , 25 , fv = 60Hz condition and Mosaic pattern.
3. This Spec. is the max load condition for the cable impedance designing.
The below figures are the measuring Vcc condition and the Vcc control block LGD used.
The Vcc condition is same as the minimum of T1 at Power on sequence.
3.3V
Rising time
Vcc 90%
0V 10%
0.5ms
4. This impedance value is needed for proper display and measured form LVDS Tx to the mating connector.
5. The measuring position is the connector of LCM and the test conditions are under 25 .
6. The current and power consumption with LED Driver are under the Vled = 12.0V , 25 , Dimming of
Max luminance and White pattern with the normal frame frequency operated(60Hz).
7. The below figures are the measuring Vled condition 12.0V
and the Vled control block LGD used. Rising time 90%
VLED control block is same with Vcc control block. VLED
0V 10%
0.5ms
8. The operation of LED Driver below minimum dimming ratio may cause flickering or reliability issue.
9. If Jitter of PWM is bigger than maximum, it may induce flickering.
10. 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.
11. The life time is determined as the time at which brightness of LCD is 50% compare to that of minimum
value specified in table 7. under general user condition
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LP156WH4
Liquid Crystal Display
Product Specification
3-2. Interface Connections
This LCD employs two interface connections, a 40 pin connector used for the module electronics interface and
the other connector used for the integral backlight system.
Table 3. MODULE CONNECTOR PIN CONFIGURATION (CN1)
Pin Symbol Description Notes
1 NC No Connection. [Interface Chip]
2 VCC LCD Logic and driver power (3.3V Typ.) 1. LCD :
3 VCC LCD Logic and driver power (3.3V Typ.) SiW, SW0645(LCD Controller)
4 V EEDID DDC Power (3.3V) Including LVDS Receiver.
5 NC No Connection. 2. System : SiW LVDSRx or equivalent
6 Clk EEDID DDC Clock * Pin to Pin compatible with LVDS
7 DATA EEDID DDC Data
[Connector]
8 ORX0- Negative LVDS differential data input
LSMtron GT05Q-40S-H10-MN
9 ORX0+ Positive LVDS differential data input
10 GND LCM Ground
[Mating Connector]
11 ORX1- Negative LVDS differential data input
20453-040T-0# series or equivalent
12 ORX1+ Positive LVDS differential data input
13 GND LCM Ground [Connector pin arrangement]
14 ORX2- Negative LVDS differential data input
15 ORX2+ Positive LVDS differential data input
16 GND LCM Ground
17 ORXC- Negative LVDS differential clock input
18 ORXC+ Positive LVDS differential clock input
19 GND LCM Ground
[LCD Module Rear View]
20 NC No Connection
21 NC No Connection
22 GND LCM Ground
23 NC No Connection
24 NC No Connection
25 GND LCM Ground
26 NC No Connection
27 NC No Connection
28 GND LCM Ground
29 NC No Connection
30 NC No Connection
31 GND LCM Ground (LED Backlight Ground)
32 GND LCM Ground (LED Backlight Ground)
33 GND LCM Ground (LED Backlight Ground)
34 NC No Connection.
35 PWM System PWM Signal input for dimming
36 LED_EN LED Backlight On/Off
37 NC No Connection
38 VLED LED Backlight Power (7V-21V)
39 VLED LED Backlight Power (7V-21V)
40 VLED LED Backlight Power (7V-21V)
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LP156WH4
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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LP156WH4
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 >
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LP156WH4
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
DCLK Frequency fCLK - 70.0 - MHz
Period tHP 1464 1492 1528
Hsync Width tWH 32 48 62 tCLK
Width-Active tWHA 1366 1366 1366
Period tVP 776 782 792
Vsync
Width tWV 2 5 8 tHP
Width-Active tWVA 768 768 768
Horizontal back porch tHBP 34 42 60
tCLK
Data Horizontal front porch tHFP 32 36 40
Enable Vertical back porch tVBP 4 6 12
tHP
Vertical front porch tVFP 2 3 4
Appendix) all reliabilities are specified for timing specification based on refresh rate of 60Hz.
However, LP156WH4 has a good actual performance even at lower refresh rate (e.g. 40Hz or 50Hz)
for power saving mode, whereas LP140WH4 is secured only for function under lower refresh rate.
60Hz at Normal mode, 50Hz, 40Hz at Power save mode. Don't care Flicker level (power save mode).
3-5. Signal Timing Waveforms Condition : VCC =3.3V
High: 0.7VCC
Data Enable, Hsync, Vsync
Low: 0.3VCC
tCLK
DCLK 0.5 Vcc
tHP
Hsync t
WH
tHBP tWHA tHFP
Data Enable
tVP
tWV
Vsync tVFP
tVBP tWVA
Data Enable
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LP156WH4
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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LP156WH4
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 BL
0V (Off)
On/Off Control Signal
LED_EN
T9 T10
LED BL Valid Data
Dimming Control Signal 0V (Low)
PWM
T8 T11
90% 90%
LED Driver Input Voltage
VLED 0V 10% T12 T13 10%
Table 6. POWER SEQUENCE TABLE
Logic Value LED Value
Units Units
Parameter Min. Typ. Max. Parameter Min. Typ. Max.
T1 0.5 - 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 T12 0.5 - - ms
T6 0 - - ms T13 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 be on pull-down condition on invalid status.
4. LGD recommend the rising sequence of VLED after the Vcc and valid status of LVDS turn on.
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LP156WH4
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 9. OPTICAL CHARACTERISTICS
Table 7. OPTICAL CHARACTERISTICS Ta=25qC, Vcc=3.3V, fV=60Hz, fCLK= 70.0MHz
Values
Parameter Symbol Units Notes
Min Typ Max
Contrast Ratio CR 400 - 1
Surface Luminance, white LWH 185 220 - cd/m2 2
G WHITE_5P 70 - - %
Luminance Variation 3
G WHITE_13P 60 70 - %
Response Time TrR+ TrD - 16 - ms 4
Color Coordinates
RED RX 0.588 0.618 0.648
RY 0.339 0.369 0.399
GREEN GX 0.325 0.355 0.385
GY 0.573 0.603 0.633
BLUE BX 0.121 0.151 0.181
BY 0.073 0.103 0.133
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
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LP156WH4
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 0.16
L7 1.48
L15 5.57
L23 12
L31 20.8
L39 35.3
L47 55.5
L55 79.1
L63 100
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LP156WH4
Liquid Crystal Display
Product Specification
FIG. 2 Luminance
H
10mm A
6 7 8 10mm
2 3
B H,V : ACTIVE AREA
V A : H/4 mm
9 1 10
B : V/4 mm
POINTS: 13 POINTS
4 5 13
11 12
FIG. 3 Response Time Active Area
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
FIG. 4 Viewing angle Normal
Eye Y
I = 90 q , Up
I = 180 q ,
Left T
I
I = 0q ,
Right
I = 270 q ,
Down
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LP156WH4
Liquid Crystal Display
Product Specification
5. Mechanical Characteristics
The contents provide general mechanical characteristics for the model LP156WH4. In addition the figures
in the next page are detailed mechanical drawing of the LCD.
Horizontal 359.3 r 0.5mm
Outline Dimension Vertical 209.5 r 0.5mm
Thickness 5.5mm (max)
Horizontal 350.0 r 0.5mm
Bezel Area
Vertical 197.1 r 0.5mm
Horizontal 344.232 mm
Active Display Area
Vertical 193.536 mm
Weight 420g (Max.)
Surface Treatment Glare treatment of the front polarizer
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LP156WH4
Liquid Crystal Display
Product Specification
Note) Unit:[mm], General tolerance: r 0.5mm
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LP156WH4
Liquid Crystal Display
Product Specification
Note) Unit:[mm], General tolerance: r 0.5mm
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LP156WH4
Liquid Crystal Display
Product Specification
[ DETAIL DESCRIPTION OF SIDE MOUNTING SCREW ]
* Mounting Screw Length (A)
= 2.0(Min) / 2.5(Max)
* Mounting Screw Hole Depth (B)
= 2.5(Min)
* Mounting hole location : 3.1(Typ)
* Torque : 2.5 kgf.cm(Max) / 2.3kgf.cm(Min)
(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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LP156WH4
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Product Specification
LGD Proposal for system cover design.(Appendix)
1
Gap check for securing the enough gap between LCM
and System cover.
Max Thickness
Sponge
LCM Reflector Side
System Cover
A Boundary Line
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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LP156WH4
Liquid Crystal Display
Product Specification
LGD Proposal for system cover design.
Gap check for securing the enough gap between LCM
3
and System hinge.
COF
(D-IC)
Hinge
Side Mount Screw Hole (4ea)
GAP:Min2.0mm
("I" TYPE) ("L" TYPE)
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.
#2 #1
#3
Bad Ok Good
1.COF area needs to be handled with care.
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