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LP156WHB
Liquid Crystal Display

Product Specification

SPECIFICATION
FOR
APPROVAL

( ◆ ) Preliminary Specification
(
) Final Specification

15.6” HD TFT LCD

Title
Customer

Asus

MODEL

SUPPLIER

LG Display Co., Ltd.

*MODEL

LP156WHB

Suffix

TLA1

*When you obtain standard approval,
please use the above model name without suffix

APPROVED BY

SIGNATURE

J. S. Park / Manager
/
REVIEWED BY
/

S. W. Kim / Manager

PREPARED BY
K. T. Baek / Engineer
Y. C. Jung / Engineer

Products Engineering Dept.
LG Display Co., Ltd

Please return 1 copy for your confirmation with
your signature and comments.

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LP156WHB
Liquid Crystal Display

Product Specification

Contents
RECORD OF REVISIONS……………………………………………………………………

1. GENERAL DESCRIPTION………………………………………………………………

2. ABSOLUTE MAXIMUM RATINGS……………………………………………………...

3. ELECTRICAL SPECIFICATIONS………………………………………….……………

3-1. LCD ELECTRICAL CHARACTREISTICS…..………………………………………….....

3-2. LED BACKLIGHT ELECTRICAL CHARACTREISTICS……………………………….....

3-3. INTERFACE CONNECTIONS………………………………………………………………

3-4. LVDS SIGNAL TIMING SPECIFICATION…………………………………………………

3-5. SIGNAL TIMING SPECIFICATIONS………………………………………………………. 11
3-6. SIGNAL TIMING WAVEFORMS…………………………………………………………… 11
3-7. COLOR INPUT DATA REFERENCE……………………………………………………… 12
3-8. POWER SEQUENCE……………………………………………………………………….. 13

4. OPTICAL SPECIFICATIONS…………………………………………………………… 14
5. MECHANICAL CHARACTERISTICS………………………………………………….

6. RELIABLITY……………………………………………………………………………… 20
7. INTERNATIONAL STANDARDS………………………………………………………. 21
7-1. SAFETY…………………………………………………………………..………………...… 21
7-2. ENVIRONMENT……………………………………………………………..…………...….

8. PACKING………………………………………………………………………...……….. 22
8-1. DESIGNATION OF LOT MARK………………………………………………….………… 22
8-2. PACKING FORM…………………………………………………………………..………… 22

9. PRECAUTIONS…………………………………………………………………………… 23
APPENDIX A. LGD PROPOSAL FOR SYSTEM COVER DESIGN………………...……………..……. 25
APPENDIX B. ENHANCED EXTENDED DISPLAY IDENTIFICAION DATA….…………………….…..

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Liquid Crystal Display

Product Specification

Record of Revisions
Revision No Revision Date
0.0

Ver. 0.0

Jan. 06. 2014

Page
All

Description
First Draft (Preliminary Specification)

Jan. 06, 2014

EDID
version
0.0

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LP156WHB
Liquid Crystal Display

Product Specification

1. General Description
The LP156WHB 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 subpixels 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 LP156WHB has been designed to apply the interface method that enables low power, high
speed, low EMI. The LP156WHB 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 subpixels, the LP156WHB characteristics provide an excellent flat display for office automation products such
as Notebook PC.

I2C

EEPROM
for EDID & T-Con

User connector

TFT-LCD Panel

I2C
LVDS

1366

(1366 x RGB x 768)

Data Signal

Timing
Controller

768
DVCC

Gate
Signal

40
Pin

VCC

VLED
LED_EN
PWM

Power Block

DVCC, AVDD ,Vcom,
Gamma, Gate Signal

LED Driver

LED Cathode

Source Driver

VOUT_LED

LED Backlight

General Features
Active Screen Size

15.6 inches diagonal

Outline Dimension

359.5(H, Typ.) × 217.2(V, Typ.) × 3.80(D, Max.) [mm] (with PCBA)

Pixel Pitch

0.252 mm X 0.252 mm

Pixel Format

1366 horiz. by 768 vert. Pixels RGB strip arrangement

Color Depth

6-bit, 262,144 colors

Luminance, White

200 cd/m2(Typ.)

Power Consumption

Total 2.8W (Typ.) Logic : 0.7W (Typ. @ Mosaic), B/L : 2.1W (Typ.)

Weight

400g (Max.)

Display Operating Mode

Normally white

Surface Treatment

Glare treatment (3H) of the front Polarizer

RoHS Compliance

Yes

BFR / PVC / As Free

Yes for all

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Product Specification

2. Absolute Maximum Ratings
The following are maximum values which, if exceeded, may cause faulty operation or damage to the unit.

Table 1. ABSOLUTE MAXIMUM RATINGS
Parameter

Values

Symbol
Min

Max

Units

Notes

Power Input Voltage

VCC

-0.3

4.0

VDC

at 25  2C

Operating Temperature

TOP

C

Storage Temperature

HST

-20

C

Operating Ambient Humidity

HOP

%RH

Storage Humidity

HST

%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.
Note : 2. Storage Condition is guaranteed under packing condition.
90% 80%
60%

50
40%

40
30
20

20%

Humidity[(%)RH]

Wet Bulb
Temperature [℃]

Storage

Operation

0
10%
-20

Dry Bulb Temperature [℃]

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Liquid Crystal Display

Product Specification

3. Electrical Specifications
3-1. LCD Electrical Characteristics
Table 2. LCD ELECTRICAL CHARACTERISTICS
Values
Parameter

Symbol

Unit

Notes

3.6

100

mVp-p

220

255

PCC

0.7

0.8

Power Supply Inrush Current

ICC_P

1.5

Differential Impedance

ZLVDS

100

110

Min

Typ

Max

VCC

3.0

3.3

VCCrp

ICC

Power Consumption

Power Supply Input Voltage
Permissive Power Supply Input Ripple
Power Supply Input Current

Mosaic

2
3

Note)
1. The measuring position is the connector of LCM and the test conditions are under 25℃, fv = 60Hz
2. The specified ICC current and power consumption are under the VCC = 3.3V , 25℃, fv = 60Hz condition
and Mosaic pattern.

3. The VCC rising time is same as the minimum of T1 at Power on sequence.

Rising time
VCC

3.3V
90%

10%
0.5ms

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Product Specification

3-2. LED Backlight Electrical Characteristics
Table 3. LED B/L ELECTRICAL CHARACTERISTICS
Values
Parameter

Symbol
Min

Typ

Max

Unit

Notes
1

LED Power Input Voltage

VLED

7.0

12.0

21.0

LED Power Input Current

ILED

175

193

LED Power Consumption

PLED

2.1

2.3

LED Power Inrush Current

ILED_P

1.5

PWM Duty Ratio

100

PWM Jitter

0.2

FPWM

200

1000

High Level Voltage

VPWM_H

2.5

3.6

Low Level Voltage

VPWM_L

0.3

High Voltage

VLED_EN_H

2.5

3.6

Low Voltage

VLED_EN_L

0.3

12,000

Hrs

PWM Frequency
PWM

LED_EN
Life Time

Note)
1. The measuring position is the connector of LCM and the test conditions are under 25℃.
2. The current and power consumption with LED Driver are under the VLED = 12.0V , 25℃, PWM Duty 100%
and White pattern with the normal frame frequency operated(60Hz).
3. The VLED rising time is same as the minimum of T13 at Power on sequence.
12.0V
Rising time
VLED

90%

10%
0.5ms

4. The operation of LED Driver below minimum dimming ratio may cause flickering or reliability issue.
5. If Jitter of PWM is bigger than maximum, it may induce flickering.
6. 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.
7. 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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Product Specification

3-3. Interface Connections
Table 4. MODULE CONNECTOR PIN CONFIGURATION (CN1)
Pin

Symbol

Description

VCC

LCD Logic and driver power (3.3V Typical)

VCC

LCD Logic and driver power (3.3V Typical)

V EDID

DDC power (3.3V)

CLK EDID

DDC clock

DATA EDID

DDC data

X0-

Negative LVDS differential data input for pixel

X0+

Positive LVDS differential data input for pixel

No Connection

High speed ground

GND

X1-

Negative LVDS differential data input for pixel

X1+

Positive LVDS differential data input for pixel

GND

High speed ground

X2-

Negative LVDS differential data input for pixel

X2+

Positive LVDS differential data input for pixel

GND

High speed ground

XC-

Negative LVDS differential clock input for pixel

XC+

Positive LVDS differential clock input for pixel

GND

No Connection

GND

No Connection

GND

No Connection

GND

No Connection

BL_GND

LED Backlight ground

BL_GND

LED Backlight ground

BL_GND

LED Backlight ground

BL PWM

BL ENABLE

VLED

High speed ground

[Connector]
LSM, GT05Q-40S-H10
or equivalent

[Connector pin arrangement]
Pin 40
Pin 1

High Speed Ground

[EDID & LGD P-Vcom Share pin]
1. Pin for EDID & P-Vcom : #6, #7
2. P-Vcom Address : 0101000x

High Speed Ground

No Connection
System PWM signal input for dimming
LED Backlight on/off control
No Connection
LED Backlight power (12V Typical)

VLED

LED Backlight power (12V Typical)

VLED

LED Backlight power (12V Typical)

Ver. 0.0

Notes

No Connection

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Product Specification

3-3. LVDS Signal Timing Specifications
3-3-1. DC Specification
LVDS -

VDD=1.8V
|VID|

LVDS +

VIN_MAX VIN_MIN

VCM
# |VID| = |(LVDS+) – (LVDS-)|
# VCM = {(LVDS+) + (LVDS-)}/2
0V

Description

Symbol

Min

Typ

Max

Unit

Notes

LVDS Differential Voltage

|VID|

100

600

LVDS Common mode Voltage

VCM

|VID| /2

1.2

VDD- |VID|/2

LVDS Input Voltage Range

VIN

0.3

VDD

3-3-2. AC Specification
Tclk
LVDS Clock

LVDS Data

tSKEW

Description

tSKEW (Fclk = 1/Tclk)
1) 85MHz > Fclk ≥ 65MHz : -400 ~ +400
2) 65MHz > Fclk ≥ 25MHz : -600 ~ +600

Symbol

Min

Max

Unit

Notes

tSKEW

- 400

+ 400

85MHz > Fclk ≥
65MHz

tSKEW

- 600

+ 600

65MHz > Fclk ≥
25MHz

tSKEW_EO

- 1/7

+ 1/7

Tclk

Maximum deviation
of input clock frequency during SSC

FDEV

±3

Maximum modulation frequency
of input clock during SSC

FMOD

200

KHz

LVDS Clock to Data Skew Margin

LVDS Clock to Clock Skew Margin (Even
to Odd)

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LP156WHB
Liquid Crystal Display

Product Specification
tSKEW_EO

LVDS Odd Clock
Tclk
LVDS Even Clock
Tclk
LVDS Even Data

< Clock skew margin between channel >
Freq.
Fmax
Fcenter * FDEV
Fcenter
Fmin
1
FMOD
Time

< Spread Spectrum >

3-3-3. Data Format
1) LVDS 1 Port

Tclk
Tclk *3/7

Tclk *4/7

RCLK+

Tclk *1/7

RA+/-

MSB

R5
R4

RB+/-

RC+/-

R2
R1

Previous (N-1)th Cycle

VSYNC HSYNC

Current (N)th Cycle

VSYNC HSYNC

LSB

Next (N+1)th Cycle

< LVDS Data Format >

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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
DCLK

Hsync

Vsync

Data
Enable

Symbol

Min

Typ

Max

Unit
MHz

Frequency

fCLK

76.32

Period

tHP

1594

1610

1626

Width

tWH

Width-Active

tWHA

Note

tCLK

1366

Period

tVP

787

790

793

Width

tWV

Width-Active

tWVA

Horizontal back porch

tHBP

160

164

168

Horizontal front porch

tHFP

Vertical back porch

tVBP

Vertical front porch

tVFP

tHP

768
tCLK

tHP

Notice. all reliabilities are specified for timing specification based on refresh rate of 60Hz. However,
LP156WHB has a good actual performance even at lower refresh rate (e.g. 40Hz or 50Hz) for power saving
Mode, whereas LP156WHB 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
High: 0.7VCC

Data Enable, Hsync, Vsync

Condition : VCC =3.3V

Low: 0.3VCC

tCLK

DCLK

Hsync

0.5 Vcc

tHP
tWH
tHBP

tWHA

tHFP

tWVA

tVFP

Data Enable
tVP
tWV
Vsync

tVBP

Data Enable
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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

Color

Basic
Color

RED

GREEN

BLUE

Ver. 0.0

GREEN

MSB

BLUE

LSB MSB

R4 R3 R2 R1

Black

Red

Green

Blue

Cyan

Magenta

LSB

G4 G3 G2 G1 G0 B5

0 0

1 0

0 1

0 0

0 1

1 0

Yellow

White

RED (00)

RED (01)

…

R0 G5

LSB MSB
B3

0 0

1 0

0 1

1 1

0 1

1 1

1 0

1 1

0 0

1 0

0 0

…

RED (62)

0 0

RED (63)

1 0

0 0

GREEN (00)

0 0

GREEN (01)

0 0

1 0

…

...

…

GREEN (62)

0 1

0 0

GREEN (63)

0 1

1 0

BLUE (00)

0 0

BLUE (01)

0 0

…

BLUE (62)

0 0

0 1

BLUE (63)

0 0

0 1

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Liquid Crystal Display

Product Specification

3-7. Power Sequence
90%

90%

Power Supply Input
VCC
0V 10%

10%
T1

Interface Signal, Vi
LVDS

T3 T7

Valid Data

0V
LED BL
On/Off Control Signal
LED_EN

3.0V

0V (Off)
T10

T9
LED BL
Dimming Control Signal
PWM

Valid Data

0V (Low)
T8

LED Driver Input Voltage
VLED

T11

90%

10%

90%

T13

T12

10%

Table 6. POWER SEQUENCE TABLE
Symbol

Value

Units

Symbol

Min

Typ

Max

0.5

500

Value

Units

Min

Typ

Max

T10

T11

200

T12

0.5

200

T13

0.5

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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Liquid Crystal Display

Product Specification

4. Optical Specification
Optical characteristics are determined after the unit has been ‘ON’ and stable for approximately 20 minutes in
a dark environment at 25C. The values specified are at an approximate distance 50cm from the LCD surface
at a viewing angle of  and  equal to 0.
FIG. 1 presents additional information concerning the measurement equipment and method.
FIG. 1 Optical Characteristic Measurement Equipment and Method
LCD Module

Optical Stage(x,y)

Equipment

500mm±50mm

Table 7. OPTICAL CHARACTERISTICS
Ta=25C, VCC=3.3V, fV=60Hz

Parameter

Symbol

Values
Min

Typ

Max

Contrast Ratio

400

500

Surface Luminance, white

LWH

170

200

 WHITE (5P)

1.2

1.4

 WHITE(13P)

1.4

1.6

Tr + Tf

Luminance Variation
Response Time
RED

Color
Coordinates

GREEN

BLUE

WHITE

Viewing Angle

0.578

0.344

0.337

Gy
Bx

Typical
- 0.03

0.159

0.12

0.313

0.329

Notes
1

cd/m2

Typical
+ 0.03

x axis, right(=0)

r

x axis, left (=180)

l

y axis, up (=90)

u

y axis, down (=270)

d

Gray Scale
Ver. 0.0

0.571

Units

Degree

6
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LP156WHB
Liquid Crystal Display

Product Specification
Note)
1. It should be measured in the center of screen(1 Point). Contrast Ratio(CR) is defined mathematically as
Surface Luminance with all white pixels
Contrast Ratio(1 Point) =
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 2.
LWH = Average(1,2, … 5 Point)
3. The variation in surface luminance , The panel total variation ( WHITE) is determined by measuring N
at each test position 1 through 13 and then defined as following numerical formula.
For more information see FIG 2.
 WHITE (5P) =

Maximum (1,2, … 5 Point)
Minimum (1,2, … 5 Point)

 WHITE (13P) =

Maximum (1,2, … 13 Point)
Minimum (1,2, … 13 Point)

4. Response time is the time required for the display to transition from white to black (rise time, Tr) and
from black to white (falling time, Tf). 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

Ver. 0.0

Gray Level

Luminance [%] (Typ)

TBD

L15

TBD

L23

TBD

L31

TBD

L39

TBD

L47

TBD

L55

TBD

L63

100

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Liquid Crystal Display

Product Specification
FIG. 2 Luminance

H
A

10mm
6

B
V

H,V : ACTIVE AREA
A : H/4 mm
B : V/4 mm

1
4

10mm

POINTS: 13 POINTS

5 13

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”.

Tr
%
100
90
Optical
Response
10
0

white

white
black

FIG. 4 Viewing angle

Normal
Eye

 = 180

,
Left

 = 90 , Up




 = 0

 = 270

Ver. 0.0

,
Right

,
Down

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Product Specification

5. Mechanical Characteristics
The contents provide general mechanical characteristics for the model LP156WHB. In addition the figures
in the next page are detailed mechanical drawing of the LCD.

Outline Dimension

Horizontal

359.5  0.5 mm

Vertical

217.2  0.5 mm (with PCBA)

Thickness

3.8 mm (max)

Horizontal

347.5  0.5 mm

Vertical

196.8  0.5 mm

Horizontal

344.23 mm

Vertical

193.54 mm

Bezel Area

Active Display Area
Weight
Surface Treatment

Ver. 0.0

400g (Max.)
Hard Coating(3H), Glare treatment of the front polarizer

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Product Specification

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Liquid Crystal Display

Product Specification
Note) Unit:[mm], General tolerance:  0.5mm

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Product Specification

6. Reliability
Environment test condition
No.

Test Item

Conditions

High temperature storage test

Ta= 60C, 240h

Low temperature storage test

Ta= -20C, 240h

High temperature operation test

Ta= 50C, 50%RH, 240h

Low temperature operation test

Ta= 0C, 240h

Vibration test (non-operating)

Random, 1.0Grms, 10 ~ 300Hz(PSD 0.0035)
3 axis, 30min/axis

Shock test (non-operating)

- No functional or cosmetic defects following a shock
to all 6 sides delivering at least 180 G in a half sine
pulse no longer than 2 ms to the display module
- No functional defects following a shock delivering
at least 200 g in a half sine pulse no longer than 2
ms to each of 6 sides. Each of the 6 sides will be
shock tested with one each display, for a total of 6
displays

Altitude

0 ~ 10,000 feet (3,048m) 24Hr
0 ~ 40,000 feet (12,192m) 24Hr

operating
storage / shipment

{ Result Evaluation Criteria }
There should be no change which might affect the practical display function when the display quality
test is conducted under normal operating condition.

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Liquid Crystal Display

Product Specification

7. International Standards
7-1. Safety
a) UL 60950-1, Underwriters Laboratories Inc.
Information Technology Equipment - Safety - Part 1 : General Requirements.
b) CAN/CSA-C22.2 No. 60950-1-07, Canadian Standards Association.
Information Technology Equipment - Safety - Part 1 : General Requirements.
c) EN 60950-1, European Committee for Electro technical Standardization (CENELEC).
Information Technology Equipment - Safety - Part 1 : General Requirements.
d) IEC 60950-1, The International Electro technical Commission (IEC).
Information Technology Equipment - Safety - Part 1 : General Requirements

7-2. Environment
a) RoHS, Directive 2011/65/EU of the European Parliament and of the council of 8 June 2011

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Product Specification

8. Packing
8-1. Designation of Lot Mark
a) Lot Mark
A

A,B,C : SIZE(INCH)
E : MONTH

D : YEAR
F ~ M : SERIAL NO.

Note
1. YEAR
Year

2011

2012

2013

2014

2015

2016

2017

2018

2019

2020

Mark

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Mark

2. MONTH

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 : 20 pcs
b) Box Size : 478 x 365 x 328

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Liquid Crystal Display

Product Specification

9. PRECAUTIONS
Please pay attention to the followings when you use this TFT LCD module.

9-1. MOUNTING PRECAUTIONS
(1) You must mount a module using holes arranged in four corners or four sides.
(2) You should consider the mounting structure so that uneven force (ex. Twisted stress) is not applied to the
module. And the case on which a module is mounted should have sufficient strength so that external
force is not transmitted directly to the module.
(3) Please attach the surface transparent protective plate to the surface in order to protect the polarizer.
Transparent protective plate should have sufficient strength in order to the resist external force.
(4) You should adopt radiation structure to satisfy the temperature specification.
(5) Acetic acid type and chlorine type materials for the cover case are not desirable because the former
generates corrosive gas of attacking the polarizer at high temperature and the latter causes circuit break
by electro-chemical reaction.
(6) Do not touch, push or rub the exposed polarizers with glass, tweezers or anything harder than HB
pencil lead. And please do not rub with dust clothes with chemical treatment.
Do not touch the surface of polarizer for bare hand or greasy cloth.(Some cosmetics are detrimental
to the polarizer.)
(7) When the surface becomes dusty, please wipe gently with absorbent cotton or other soft materials like
chamois soaks with petroleum benzene. Normal-hexane is recommended for cleaning the adhesives
used to attach front / rear polarizers. Do not use acetone, toluene and alcohol because they cause
chemical damage to the polarizer.
(8) Wipe off saliva or water drops as soon as possible. Their long time contact with polarizer causes
deformations and color fading.
(9) Do not open the case because inside circuits do not have sufficient strength.
(10) When handling the LCD module, it needs to handle with care not to give mechanical stress to the PCB
and Mounting Hole area.”

9-2. OPERATING PRECAUTIONS
(1) The spike noise causes the mis-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 lower 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.

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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.
(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) 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
ion-blown equipment or in such a condition, etc.
(2) The protection film is attached to the polarizer with a small amount of glue. If some stress is applied
to rub the protection film against the polarizer during the time you peel off the film, the glue is apt to
remain on the polarizer.
Please carefully peel off the protection film without rubbing it against the polarizer.
(3) 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 polarizer after the protection film is peeled off.
(4) You can remove the glue easily. When the glue remains on the polarizer surface or its vestige is
recognized, please wipe them off with absorbent cotton waste or other soft material like chamois
soaked with normal-hexane.

9-7. THE LGD QA RESPONSIBILITY WILL BE AVOIDED IN CASE OF BELOW
(1)
(2)
(3)
(4)

When the customer attaches TSM(Touch Sensor Module) on LCM without Supplier’s approval.
When the customer attaches cover glass on LCM without Supplier’s approval.
When the LCMs were repaired by 3rd party without Supplier’s approval.
When the LCMs were treated like Disassemble and Rework by the Customer and/or Customer’s
representatives without supplier’s approval.

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APPENDIX A. LGD Proposal for system cover design
1

Gap check for securing the enough gap between LCM and System back cover.

LCM

PAD
Back cover
Boss

◆ a : min 0mm
◆ b : min 0.3mm, Max 1.0mm

Boss
PAD
Back 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.
(e.g.. Ripple, White spot..)
Check if antenna cable is sufficiently apart from T-CON of LCD Module.

T-CON

OK
Define
Ver. 0.0

If system antenna is overlapped with T-CON, It might be cause the noise
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APPENDIX A. LGD Proposal for system cover design
3

Checking the path of the System wire
Wire

NG
1. If Wire path overlapped with LCM, it is happened white spot. COF problem, etc.
Define

Pad

2. OK  Wire path design to system side.
NG  Wire path overlapped with LCM.
Add pad to Prevent panel crack against external load (push)

Back cover

flange
LCM
PAD
Back cover

Boss

push

boss

push

boss
Pad
boss
Back cover

boss
boss
crack
Back cover

1. At flat type LCM, panel is easily cracked at flange area during push, assemble.
Define
2. Add pad, it prevent panel crack

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APPENDIX A. LGD Proposal for system cover design
5

Check the rib or Bracket on back cover

LCM

LCM
Back cover

Back cover
Rib

LCM

LCM
Back cover

Back cover

Define

Bracket

1.It is necessary that the height of back cover rib or bracket is higher than LCM height. It can
prevent direct compression of panel at LCM edge.
2.”ㄱ” shape bracket is stronger than “I” shape one.

Check the gap between front cover and LCM (glass)

Front cover

LCM

Back cover

[OK] a ≥ 0.3mm
[CO] 0.3mm ≥ a ≥ 0.1mm
[NG] a ≤ 0.1mm

Define

Ver. 0.0

Ripple can be happened by little gap between glass and front cover.

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APPENDIX A. LGD Proposal for system cover design
7

Check the rib or Bracket on back cover

Light leakage
Front cover

Front cover

LCM

Back cover

1.If it is possible, shrink to apply front cover of white color.
Define
2. White color can caused light leakage
8

Check the wire position(path)

Back cover

1. It is necessary that wire is posited out of hook, not posited near hook,.
Define

Ver. 0.0

2. If wire is posited near hook, it can be happened assemble error and panel crack during
assemble front cover
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APPENDIX A. LGD Proposal for system cover design
9

Check mouse pad (touch pad) depth and shape of edge

[OK] a ≤ 0.3mm
[CO] 0.5mm ≥ a ≥ 0.3mm
[NG] a ≥ 0.5mm

Mouse pad

1.Mouse pad step is deep, it is caused panel crack by external load.
Define
2. The edge shape must be smooth.
10

Check the step of keyboard area

Keyboard

push

push
crack

Define
Ver. 0.0

The step of keyboard at the side edge of main body, it is caused panel crack
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APPENDIX A. LGD Proposal for system cover design
11

Check the gap [PCB ~ system]

Panel
BLU
Back cover

FPC
A
A’

a ≥ 0.5mm [at max dimension of design]
a ≥ 1.0mm [at typical dimension of
design]

Define

Rib, Frame …

1. Gap is too small, FPC is easily cracked by interference and repetitive bending.
(circuit is opened) .
2. Gap is must be kept more than 0.5mm(max dim.) and 1.0mm(typ dim.) .

System rib (on A cover)

External
shock

crack

a
LCM
Rib
Back cover

a ≥ 0.5mm [at max dimension of design]
a ≥ 1.0mm [at typical dimension of
design]

1. Gap is too small and rib is too short, panel is easily cracked by external stress.
Define

2. Gap is must be kept more than 0.5mm(max dim.) and 1.0mm(typ dim.) .
3. The figure of rib is continuous or fully long.

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APPENDIX B. Enhanced Extended Display Identification Data (EEDIDTM)

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APPENDIX B. Enhanced Extended Display Identification Data (EEDIDTM)

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APPENDIX B. Enhanced Extended Display Identification Data (EEDIDTM)

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