LG LP-156WH4-TLN1 Service manual

Product Specification

SPECIFICATION

LP156WH4

Liquid Crystal Display

( ) Preliminary Specification
( ) Final Specification

◆

Title 15.6” HD TFT LCD

Customer LENOVO

MODEL

www.jxlcd.com

www.jxlcd.com

SIGNATUREAPPROVED BY

FOR

APPROVAL

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SUPPLIER LG Display Co., Ltd.

*MODEL LP156WH4

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

Suffix TLN1

APPROVED BY

APPROVED BY

SIGNATURE

SIGNATURE

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

Ver. 1.0 Jan. 05 .2012

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C. I. Kim / S.Manager

REVIEWED BY

REVIEWED BY

B. T. Jang / Manager

B. D. Jun / Manager

PREPARED BY

PREPARED BY

C. H. Yun / Engineer

C.K.D / Engineer

Products Engineering Dept.

LG Display Co., Ltd

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Product Specification

Contents

LP156WH4

Liquid Crystal Display

No ITEM

COVER
CONTENTS
RECORD OF REVISIONS

1
2

3
3-1

GENERAL DESCRIPTION
ABSOLUTE MAXIMUM RATINGS

ELECTRICAL SPECIFICATIONS
ELECTRICAL CHARACTREISTICS

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3-2

INTERFACE CONNECTIONS

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3-3
3-3
3-4
3-5
3-6
4

LVDS SIGNAL TIMING SPECIFICATION
SIGNAL TIMING SPECIFICATIONS
SIGNAL TIMING WAVEFORMS
COLOR INPUT DATA REFERNECE

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POWER SEQUENCE
OPTICAL SFECIFICATIONS

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A APPENDIX. LPL PROPOSAL FOR SYSTEM COVER DESIGN

6 RELIABLITY

MECHANICAL CHARACTERISTICS

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9-10

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14-16
17-20
21-23

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7 INTERNATIONAL STANDARDS
7-1 SAFETY

7-2 EMC
7-3 ENVIRONMENT

8 PACKING
8-1 DESIGNATION OF LOT MARK
8-2 PACKING FORM
8-3 LABEL DESCRIPTION
9 PRECAUTIONS

A APPENDIX. Enhanced Extended Display Identification Data

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Product Specification

RECORD OF REVISIONS

LP156WH4

Liquid Crystal Display

Revision No Revision Date Page Description

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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EDID

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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 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 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 sub­pixels, the LP156WH4 characteristics provide an excellent flat display for office automation products such as
Notebook PC.

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768

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TFT-LCD Panel

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(HD, GIP, TN)

EEPROM Block

for EDID

User connector 40 Pin

LVDS

1port

Timing Control

Block

DVCC

CLKs

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P

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1366

AVCC, AVDD

VCC

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VLED

LED_EN

PWM

Power

Block

LED Driver

Block

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VGH, VGL, GMA

GIP CLKs, DSC

VOUT_LED

FB1~4

Source Driver
(Bottom Bent)

LED Backlight Ass’y

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Control & Data Power

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EDID signal & Power

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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

Parameter Symbol

Power Input Voltage
Operating Temperature
Storage Temperature
Operating Ambient Humidity
Storage Humidity

VCC -0.3 4.0 Vdc at 25  5C

TOP 0 50 C 1
HST -20 60 C 1
HOP 10 90 %RH 1
HST 10 90 %RH 1

Values

Units Notes

Min Max

2

1

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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.

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90% 80%

60

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60%

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Wet Bulb
Temperature [℃]

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10

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50

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40

30

Humidity[(%)RH]

Storage

40%

Operation

20%

10%

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-20

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20 30 40 50

Dry Bulb Temperature [℃]

60 70 800

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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

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 Ω 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

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LED Power Consumption PLED - 3.6 3.9 W 6
LED Power Inrush Current ILED_P - - 1500 mA 7

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Unit Notes

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PWM Duty Ratio 1 - 100 % 8
PWM Jitter
PWM Impedance ZPWM 20 40 60 kΩ

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0 - 0.2 % 9

PWM Frequency FPWM 150 - 1000 Hz 10

PWM High Level Voltage V
PWM Low Level Voltage V
LED_EN Impedance ZPWM 20 40 60 kΩ
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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PWM_H

PWM_L

2.2 - 5.3 V
0 - 0.3 V

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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.

7

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.

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Rising time
Vcc

90%

3.3V

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10%

0.5ms

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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
and the Vled control block LGD used.
VLED control block is same with Vcc control block.

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Rising time
VLED

12.0V

90%

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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10%

0.5ms

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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.
2 VCC LCD Logic and driver power (3.3V Typ.)
3 VCC LCD Logic and driver power (3.3V Typ.)
4 V EEDID DDC Power (3.3V)
5 NC No Connection.
6 Clk EEDID DDC Clock
7 DATA EEDID DDC Data
8 ORX0- Negative LVDS differential data input

9 ORX0+ Positive LVDS differential data input
10 GND LCM Ground
11 ORX1- Negative LVDS differential data input
12 ORX1+ Positive LVDS differential data input
13 GND LCM Ground
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
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
32
33
34 NC No Connection.
35
36
37
38
39
40

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GND LCM Ground (LED Backlight Ground)
GND LCM Ground (LED Backlight Ground)
GND LCM Ground (LED Backlight Ground)

PWM System PWM Signal input for dimming

LED_EN

NC
VLED LED Backlight Power (7V-21V)
VLED LED Backlight Power (7V-21V)
VLED LED Backlight Power (7V-21V)

LED Backlight On/Off
No Connection

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[Interface Chip]

1. LCD :
SiW, SW0645(LCD Controller)
Including LVDS Receiver.

2. System : SiW LVDSRx or equivalent
* Pin to Pin compatible with LVDS

[Connector]
LSMtron GT05Q-40S-H10-MN

[Mating Connector]

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20453-040T-0# series or equivalent

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[Connector pin arrangement]

40

[LCD Module Rear View]

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Product Specification

LVDS +

LVDS -

0V

V

CM

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

|VID|

V

IN_MAXVIN_MIN

LVDS Data

t

SKEW

LVDS Clock

T

clk

t

SKEW (Fclk

= 1/T

clk

)

1) 85MHz > Fclk ≥ 65MHz : -400 ~ +400

2) 65MHz > Fclk ≥ 25MHz : -600 ~ +600

3-3. LVDS Signal Timing Specifications

3-3-1. DC Specification

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2

Description

LVDS Differential Voltage |VID| 100 600 mV ­LVDS Common mode Voltage V

Symbo

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CM

Min Max Unit Notes

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Liquid Crystal Display

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LVDS Input Voltage Range V

3-3-2. AC Specification

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Description Symbol Min Max Unit Notes

LVDS Clock to Data Skew Margin

LVDS Clock to Clock Skew Margin (Even
to Odd)

Maximum deviation
of input clock frequency during SSC

Maximum modulation frequency
of input clock during SSC

IN

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t

SKEW

t

SKEW

t

SKEW_EO

F

DEV

F

MOD

0.3 2.1 V -

g

400- + 400 ps

600- + 600 ps

- 1/7 + 1/7 T

- ± 3 % -

- 200 KHz -

clk

85MHz > Fclk ≥

65MHz

65MHz > Fclk ≥

25MHz

-

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Product Specification

LVDS Even Data

LVDS Odd Clock

LVDS Even Clock

t

SKEW_EO

T

clk

T

clk

< Clock skew margin between channel >

LP156WH4

Liquid Crystal Display

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Freq.

F

max

F

center

F

min

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3-3-3. Data Format

1) LVDS 1 Port

RCLK+

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< Spread Spectrum >

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1

F

MOD

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3

* F

Time

DEV

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RA+/-

RB+/-

RC+/-

RD+/-

R3 R2

G4 G3

B5 B4

G7 G6

Previous (N-1)th Cycle Next(N+1)th Cycle

R1 R0

G2 G1

B3 B2

R7 R6

G0 R5 R4 R3 R2 R1 R0

B1 B0 G5 G4 G3 G2 G1

DE VSYNC HSYNC B5 B4 B3 B2

X B7 B6 G7 G6 R7 R6

Current (Nth) Cycle

< LVDS Data Format >

G0

B1

DE

VSYNC HSYNC

X

R5 R4

B0 G5

B7 B6

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