LG LP-141XA-A1 Service manual

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( DataSheet : www.DataSheet4U.com )

LG LCD Inc.

( ) Preliminary Specification

Product Specification

SPECIFICATION

For

APPROVAL

LP141XA-A1

Li

quid Crystal Display

( ) Final Specification

Title 14.1” XGA TFT LCD

BUYER NAME PC OBU SUPPLIER LG LCD Inc.

MODEL NAME MODEL NAME LP141XA-A1

www.jxlcd.com

SIGNATURE DATE SIGNATURE DATE

APPROVED BY

S. H. Kang

REVIEWED BY

S. C. YUN

B. H. KOO

PREPARED BY

Please return 1 copy for our confirmation

with your signature and comments.

+

Version 1.4 08 / Jul. / 1999 Page 1/19

H. S. SONG

S. J. LEE

Product Engineering Dept.

LG LCD Inc.

Product Specification

LP141XA-A1

Li

quid Crystal Display

TABLE of CONTENTS

NO. ITEM Page

-

- TABLE of CONTENTS 2/19

- RECORD of REVISION 3/19

1. GENERAL DESCRIPTION 4/19

2. MAXIMUM RATINGS 5/19

3. ELECTRICAL SPECIFICATIONS 5/19

4. OPTICAL SPECIFICATIONS 6/19

5. INTERFACE CONNECTIONS 7/19

6. SIGNAL TIMING SPECIFICATIONS 9/19

7. SIGNAL TIMING WAVE FORMS 10/19

8. COLOR INPUT DATA REFERENCE 12/19

9. POWER SEQUENCE 13/19

10. MECHANICAL CHARACTERISTICS 14/19

11. HANDLING PRECAUTIONS 16/19

12. INTERNATIONAL STANDARDS 17/19

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- APPENDIX 18/19

COVER 1/19

Version 1.4 08 / Jul. / 1999 Page 2/19

LG LCD Inc.

Product Specification

Record of Revision

DATE AND VERSION DESCRIPTION

LP141XA-A1

Li

quid Crystal Display

22 / Jan. / 1999 & Ver. 1.0

12 / Feb. / 1999 & Ver. 1.1

12 / Apr. / 1999 & Ver. 1.2

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28 / May / 1999 & Ver. 1.3

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Initial Release

1. To Change Model Name (All Page)

LP141X4-C1 → LP141XA-A1

2. To change Power supply current (5 Page)

: Typ Max Typ Max

375 510 → 410 570 [mA]

3. To add International Standards (17 Page)

1. To Changed Color Coordinates (6 Page)

: Min. Typ Max Min. Typ Max

① Rx 0.542 0.572 0.602 → 0.548 0.578 0.608

② Ry 0.320 0.350 0.380 → 0.317 0.347 0.377

③ Gx 0.267 0.297 0.327 → 0.278 0.308 0.338

④ Gy 0.519 0.549 0.579 → 0.507 0.537 0.567

⑤ Bx 0.122 0.152 0.182 → 0.121 0.151 0.181

⑥ By 0.110 0.140 0.170 → 0.101 0.131 0.161

⑦ Wy 0.271 0.301 0.331 → 0.281 0.311 0.341

⑧ Wy 0.312 0.342 0.372 → 0.311 0.341 0.371

1. To change Power Sequence (13 Page)

08 / Jul. / 1999 & Ver. 1.4

Lamp On Time : 200[mS] min. → 50[mS] min.

1. Update Mechanical Drawing(14, 15 Page)

2. Change Power Sequence (13 Page)

VDD off time : 20 [mS] max. → 40 [mS] max.

Version 1.4 08 / Jul. / 1999 Page 3/19

(

)

r

y

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)

1. General Description

The LG LCD Inc. model LP141XA-A1 LCD is a Color Active Matrix Liquid Crystal Display with an integral

Cold Cathode Fluorescent Tube(CCFT) back light 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 a 14.1 inch diagonally measured active display area with XGA resolution(768 vertical by 1024

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 6-bit

gray scale signal for each dot, thus, presenting a pallet of more than 262,144 colors.

The LP141XA-A1 LCD is intended to support applications where low power consumption, weight and

thickness are critical factors and graphic displays are important. In combination with the vertical

arrangement of the sub-pixels, the LP141XA-A1 characteristics provide an excellent flat panel display for

office automation products such as portable computers.

LG LCD Inc.

Product Specification

LP141XA-A1

Li

quid Crystal Display

Power Supply

VDD GND

Rin0 -

Rin0 +

Rin1 -

Rin1 +

Rin2 -

Rin2 +

CLK -

CLK +

CN1

LVDS Receiver

Control

Signal

14.1 inch XGA

1024 x RGB x 768

Row Drive

+

www.jxlcd.com

User Connector

Timing Controller

Column Driver

Data & Control Signal

CN2

General Display Characteristics

The following are general feature of the model LP141XA-A1 LCD;

Active display area

Outsize dimensions

Pixel pitch

Pixel format

Color depth

Display operating mode

Version 1.4 08 / Jul. / 1999 Page 4/19

Surface treatment

14.1 inch diagonal

298.5 W x 227.5 H x 5.8 D mm Typ.

0.279 mm x 0.279 mm

1024 horiz. By 768 vert. pixels

RGB stripe arrangement

transmissive mode, normally white

anti-glare treatment of the front polarizer

hard coating(3H),

Back light Assembl

6-bit

LG LCD Inc.

Product Specification

LP141XA-A1

Li

quid Crystal Display

2. 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 Values Units Notes

Min. Max.

Power Input Voltage

Logic Input Voltage

Operating Temperature

Storage Temperature Note: 1. The Relative Humidity must not exceed 80% non-condensing at temperatures of 40℃ or less. At temperatures greater than 40℃, the wet bulb temperature must not exceed 39℃. At low temperature the brightness of CCFL drop and the life time of CCFL become to be short.

2. Under no condition should the unit be exposed to corrosive chemicals.

V

DD

V

L/H

TOP

TST

0

-0.3

0

-20

4.0

VDD+0.3

+50

+60

Vdc

℃ ℃

at 25℃ at 25℃

1

3. Electrical Specifications

The LP141XA-A1 requires two power inputs. One is employed to power the LCD electronics and to derive the voltages to drive the TFT array and liquid crystal. The second input which powers the backlight CCFT, is typically generated by an inverter. The inverter is an external unit to the LCD.

Parameter Symbol Values Units Notes

Min. Typ. Max.

MODULE:

Power Supply Input Voltage

Power Supply Input Current

Ripple/Noise

Differential input voltage - High

for receiver threshold Low

BACKLIGHT

Backlight Input voltage

Backlight Current

Established starting Voltage

Operating Frequency

CCFL Life Time Notes 1. The current draw and power consumption specified is for 3.3 Vdc at 25℃.

2.Typical value is measured when displaying black screen. Maximum power situation measured with alternating vertical lines by 2 black_white pattern. For more information see Appendix A-1.

3. LVDS common mode voltage, VCM=1.2V

5. The voltage of inverter is more than the established starting voltage.

www.jxlcd.com

4. The backlight power consumption shown above does not include loss of external inverter.

Table 2 ELECTRICAL CHARACTERISTICS:

V

DD

I

DD

-

V

IH

V

IL

V

BL

I

BL

F

BL

3.0

-

-100

680

3.0

40

10,000

3.3

410

60

-

725

5.0

60

3.6

570

100

-

850

6.0

1170

1450

80

Vdc

mA

mV

V

RMS

mA

V

RMS

V

RMS

KHz

Hours

1,2

3

4

25±2℃, 5

0℃

@ I

BL= 6mA

Version 1.4 08 / Jul. / 1999 Page 5/19

LG LCD Inc.

Product Specification

LP141XA-A1

Li

quid Crystal Display

4. Optical Specifications

Optical characteristics are determined after the unit has been ‘ON’ and stable for approximately 30 minutes

in a dark environment at 25℃. The values specified are at an approximate distance 50cm from the LCD

surface at a viewing angle of Φ and θ equal to 0°.

Appendix A presents additional information concerning the specified characteristics.

Table 3 OPTICAL CHARACTERISTICS

, ....B

Values

)

ON13

)

ON13

ON

Parameter Symbol

Contrast Ratio CR 150 250 - - 1

White Surface

Brightness

Brightness Variation SBV - - 1.80 3

Response Time

Color Coordinates

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Viewing

Angle

(CR>10:1)

Notes 1. Contrast Ratio (CR) is defined mathematically as: (Surface Brightness with all white pixels) (Surface Brightness with all black pixels)

2. Surface brightness is 5 spot average of measurement across the LCD surface 50cm from the

3. The variation in surface brightness, SB position 1 through 13, and then dividing the maximum B For more information see Appendix A-3. Maximum (B Minimum (B

4. Response time is the time required for the display to transition from white to black (Rise Time, Tr For additional information see Appendix A-4.

5. Viewing angle is the angle at which the contrast ratio is greater than 10. The angles are

6. Color Coordinates can be changed according to color filter. (In case of changing color filter, we will tell our customer.)

x axis, right (Φ =0ٛ) θ

x axis, left(Φ =180ٛ) θ

y axis, up(Φ =90ٛ) θ

y axis, down (Φ =270ٛ) θ

surface with all pixels displaying white. For more information see Appendix A-2.

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 Appendix A-5.

IBL=6.0mA

Rise Time TrR - 20 40 msec

Decay Time Tr

RED

GREEN

BLUE

WHITE

) and from black to white (Decay Time, TrD).

R

SB

WH

D

x 0.548 0.578 0.608 - 6

y 0.317 0.347 0.377 - 6

x 0.278 0.308 0.338 - 6

y 0.507 0.537 0.567 - 6

x 0.121 0.151 0.181 - 6

y 0.101 0.131 0.161 - 6

x 0.281 0.311 0.341 - 6

y 0.311 0.341 0.371 - 6

Min. Typ. Max.

100 120 - cd/m2 2

- 30 50 msec

45 degree 5

10 degree 5

30 degree 5

is determined by measuring BON at each test

V

, B

ON1

ON2

, B

ON1

ON2

Units Notes

by the minimum BON.

Version 1.4 08 / Jul. / 1999 Page 6/19

LG LP-141XA-A1 Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual