LG.Philips LCD LM157E1-A2 Specification

LM157E2-A2

Product Specification

SPECIFICATION

FOR

APPROVAL

(

) Preliminary Specification

(

) Final Specification



Title 15.7” SXGA TFT LCD

BUYER DID(Gateway) SUPPLIER LG.Philips LCD Co., Ltd.
MODEL *MODEL LM157E2

SUFFIX A2

* When you obtain standard

please use the above model name without suffix.

SIGNATURE

/

/

/

DATE APPROVED BY

* When you obtain standard approval ,

* When you obtain standard * When you obtain standard

please use the above model name without suffix.

please use the above model name without suffix.please use the above model name without suffix.

S.H. Kang / G.Manager

REVIEWED BY

B.K. Kim / Manager

J.T. Kim / Manager

PREPARED BY

S.H.Kim / Engineer

K.K.Jang / Manager

approval ,

approval ,approval ,

DATE

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

The preliminary document is subject to change without prior notice.

Ver 1.0 SEP 30, 2000 Page 1/24

Product Engineering Dept.

LG.Philips LCD Co., Ltd.

LM157E2-

A2

Product Specification

CONTENTS

NO. ITEM Page

- COVER 1

-CONTENTS 2

- RECORD OF REVISION 3
1 GENERAL DESCRIPTION 4
2 MAXIMUM RATINGS 5

3 ELECTRICAL SPECIFICATIONS 6
3-1 ELECTRICAL CHARACTERISTICS 6
3-2 INTERFACE CONNECTION 7
3-3 SIGNAL TIMING SPECIFICATIONS 9
3-4 SIGNAL TIMING WAVE FORMS 10
3-5 COLOR INPUT DATA REFERENCE 11
3-6 POWER SEQUENCE 12

4 OPTICAL SPECIFICATIONS 13

5 MECHANICAL CHARACTERISTICS 15

6RELIABILITY 18

7 INTERNATIONAL STANDARDS 19
7-1 SAFETY 19
7-2 EMC 19

8 PACKING 20
8-1 DESIGNATION OF LOT MARK 20
8-2 PACKING FORM 20

9 PRECAUTIONS 21

APPENDIX 23
A-1 OPTICAL CHARACTERISTIC MEASUREMENT EQUIPMENT AND METHOD 23
A-2 LUMINANCE 23
A-3 RESPONSE TIME 23
A-4 VIEWING ANGLE 24

Ver 1.0 SEP 30, 2000 Page 2/24

LM157E2-

Product Specification

RECORDS OF REVISIONS

Version No Date Page DESCRIPTION

A2

1.0 SEP.30, 2000 -

Final Specification

Ver 1.0 SEP 30, 2000 Page 3/24

LM157E2-

A2

Product Specification

1. General Description

The LM157E2-A2 is a Color Active Matrix Liquid Crystal Display with an integral Cold Cathode
Fluorescent Lamp(CCFL) back light system. The m atrix employs a-Si Thin F ilm Transistor as the active
element. It is a transmiss ive type display operating in the normally white mode. This TFT -LCD has a 15.7
inch diagonally measured active display area with SXGA resolution(1024 vertic al by 1280 horizontal pixel
array). Each pix el 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 8-bit gray scale s ignal
for each dot, thus, presenting a palette of more than 16,777,216 colors.

The LM157E2-A2 has been designed to apply the interface method that enables low power, high speed
low EMI. FPD Link must be used as a LVDS(Low Voltage Differential Signaling) chip.

The LM157E2-A2 is intended to support applic ations where thin thickness and low power consumption
are critical factors and graphic displays are im portant. In com bination with the vertic al arrangem ent of the
sub-pixels, the LM157E2-A2 characteristic s provide an excellent flat panel display for office automation
products such as monitors.

RGB

Column Driver

LVDS

Pair#1

Timing Control

LVDS

Pair #2

CN2

& LVDS 1Chip

Power

Block

G1

Row

Driver

circuiit

G1024

S1

TFT-LCD

(1280 x RGB x 1024

Backlight 2EA

S1280

General Features

The following are general feature of the model LM157E1-A2 LCD;
Active screen size 15.7 inches(39.832cm) diagonal
Outline dimensions 335.0(H)  273.5(V)  11.2(D) mm (Typ.)

Pixel pitch 0.243 mm  0.243 mm
Pixel format 1280 horiz. By 1024 vert. pixels
RGB stripe arrangement
Color depth 8-bit, 16,777,216 colors
Luminance,White 200 cd/m
Power Consumption Total 12.57 Watt,typ (2.97 Watt @IV
Weight 1140g (typ)
Display operating mode Transmissive mode, normally white
Surface treatments Hard coating(3H),

A

nti-glare treatment of the front polarizer

2

(5point Average.)

, 9.6Watt@200cd/m2 [Lamp])

AA

Ver 1.0 SEP 30, 2000 Page 4/24

LM157E2-

A2

Product Specification

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

Min. Max.

Units Notes

Power Input Voltage
Operating Temperature
Storage Temperature

V

cc

T

OP

T

ST

-0.3
0

-20

+3.5

+50
+60

Vdc




Note: 1. Temperature at 5mm above display center of LCD Module.
Ta  40 : 90%RH Max
Ta  40 : Absolute Humidity shall be less than Ta = 40 90%RH .
These shall be no dew condensation.

2. Humidity Min. 5%RH, Max. 95%RH

3. Temperature and relative humidity range are shown in the figure below.
Wet bulb temperature should be 39 max, and no condention of water.

95% 80%

%

60

40

%

Storage

Wet Bulb

Temperature []

60

50

40

at 25

1,2
1,2



-20

30

20

0

0

0

20 30 40

50

60 70 800

20

5

%

%

Operation

Humidity [(%)RH]

Dry Bulb Temperature []

Ver 1.0 SEP 30, 2000 Page 5/24

LM157E2-

A2

Product Specification

3. Electrical Specifications
3-1. Electrical Characteristics

The LM157E2-A2 requires two power inputs. One is employed to power the LCD electronics and to
drive the TFT array and liquid crystal. The other input which powers the CCFL, is typically generated by
an inverter. The inverter is an external unit to the LCD.

Table 2. ELECTRICAL CHARACTERISTICS

Parameter Symbol

MODULE:
Power Supply Input Voltage
Power Supply Input Current
Differential Impedance
Power Consumption

Vcc

Icc

Zm

Pc

Min. Typ. Max.

3.1

-

90

-

LAMP
Operating Voltage
Operating Current
Established Starting Voltage
at 25

at 0





Operating Frequency
Discharge Stabilization Time
Power Consumption(2CCFL’s)

Life Time

V

BL

I

BL

f

BL

T

S

P

BL

590

(3.0)

30,000

(8.5mA)

-

-

40

-

-

Note)The design of the inverter must have specifications for the lamp in LCD Assembly.

The performance of the Lamp in LCM, for example life time or brightness, is extremely influenced by the
characteristics of the DC-AC Inverter. So all the parameters of an inverter should be carefully designed
so as not to produce too much leakage current from high-voltage output of the inverter.
When you design or order the inverter, please make sure unwanted lighting caused by the mismatch of
the lamp and the inverter(no lighting, flicker, etc) never occurs. When you confirm it, the LCD Assembly

should be operated in the same condition as installed in your instrument
Notes:1. The current draw and power consumption specified is for 3.3 Vdc at 25and fv at 60Hz.
(at chess 8X6 pattern)

2. The variance of the voltage is 10%.

3. The output voltage at the transformer in the inverter must be high considering to the loss of the

ballast capacitor in the inverter.

4. The output of the inverter must have symmetrical(negative and positive) voltage waveform and
symmetrical current waveform.(Unsymmetrical ratio is less than 10%) Please do not use the
inverter which has unsymmetrical voltage and unsymmetrical current and spike wave.

Lamp frequency may produce interference with horizontal synchronous frequency and as a result

this may cause beat on the display. Therefore lamp frequency shall be as away as possible from
the horizontal synchronous frequency and from its harmonics in order to prevent interference.

5. The lamp power consumption shown above does not include loss of external inverter.

6. Let’s define the brightness of the lamp after being lighted for 5 minutes as 100%.

T

is the time required for the brightness of the center of the lamp to be not less than 95%.

s

7. The life time is determined as the time at which brightness of lamp is 50% compare to that of

initial value at the typical lamp current on condition of continuous operating at 25 2.

Values

3.3
900
100

2.97

600

(8.0)

58

9.6

(8mA)

-

-

3.5

1400

110

4.62

730

(8.5)

(865)

(1210)

80

10.6

(3mA)

3

-

.

Units Notes

Vdc

mA

Ohm

Watt

V

RMS

mA

V

RMS

V

RMS

KHz

Minutes

Watts

Hrs

1
1

2

3
4

6
5
7

Ver 1.0 SEP 30, 2000 Page 6/24

LM157E2-

A2

Product Specification

3-2. Interface Connections

Interface chip must be used LVDS, part No. DS90CF383MTD(Transmitter), DS90CF384MTD(Receiver)
made by National Semiconductor. Or used the compatible interface chips(TI : SN75LVDS83, Thine).
This LCD employs three inter face connections. A 30-pin connector is used for the module electronics
interface and power interface.

The electronics interface connector is a model DF19K-30P-H manufactured by HIROSE. The pin
configuration for the connector is shown in the table 3.

Table 3. MODULE CONNECTOR PIN CONFIGURATION (LVDS)

Pin Symbol Description Notes

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30

3.3V

3.3V

3.3V

3.3V
GND

GND

E_RX0-

E_RX0+

E_Rx1-

E_RX1+

E_RX2-

E_RX2+

E_RXC-

E_RXC+

E_RX3-

E_RX3+

GND
GND

O_RX0-

O_RX0+

O_RX1-

O_RX1+

O_RX2­O_RX2+
O_RXC-

O_RXC+

O_RX3­O_RX3+

GND
GND

3.3V

3.3V

3.3V

3.3V
GROUND
GROUND
Minus Signal of Even Channel 0 (LVDS)
Plus Signal of Even Channel 0 (LVDS)
Minus Signal of Even Channel 1 (LVDS)
Plus Signal of Even Channel 1 (LVDS)
Minus Signal of Even Channel 2 (LVDS)
Plus Signal of Even Channel 2 (LVDS)
Minus Signal of Even Clock Channel(LVDS)
Plus Signal of Even Clock Channel(LVDS)
Minus Signal of Even Channel 3 (LVDS)
Plus Signal of Even Channel 3 (LVDS)
GROUND
GROUND
Minus Signal of Odd Channel 0 (LVDS)
Plus Signal of Odd Channel 0 (LVDS)
Minus Signal of Odd Channel 1 (LVDS)
Plus Signal of Odd Channel 1 (LVDS)
Minus Signal of Odd Channel 2 (LVDS)
Plus Signal of Odd Channel 2 (LVDS)
Minus Signal of Odd Clock Channel(LVDS)
Plus Signal of Odd Clock Channel(LVDS)
Minus Signal of Odd Channel3(LVDS)
Plus Signal of Odd Channel3(LVDS)
GROUND
GROUND

Second Data

First Data

30

Transparent View

Ver 1.0 SEP 30, 2000 Page 7/24

LM157E2-

A2

Product Specification

The backlight interface connector is a model BHR-03VS-1, manufactored by JST. The mating connector
part number is SM02(8.0)B-BHS-1-TB or equivalent. The pin configuration for the connector is shown in
The table below.

Table 4. BACKLIGHT CONNECTOR PIN CONFIGURATION

Pin Symbol Description Notes

1
2
3

HV

Open

LV

Lamp power input

Open

GROUND

1
2

Notes: 1. The input power terminal is colored pink . Ground pin color is white.

2. The lamp ground should be common with GND.

Table 5 Required Signal A ssignment for FlatLink

Pin # Pin Name Required Signals Pin # Pin Name Required Signals

1 Vcc Power supply for TTL input 29 GND Ground pin for TTL
2 D5 TTL Input(R7) 30 D26 TTL Input (Data Enable)

3 D6 TTL Input (R5) 31 TxCLKIN TTL Input clock input
4 D7 TTL Input (G0) 32 PWR DWN Power down input
5 GND Ground pin f or TTL 33 PLL GND Ground pin for PLL
6 D8 TTL Input (G1) 34 PLL VCC Power supply f or P LL
7 D9 TTL Input (G2) 35 PLL GND Ground pin for PLL
8 D10 TTL Input (G6) 36 LVDS GND Ground pin for LVDS

9 Vcc Power supply for TTL input 37 TxOUT3+ Positive LVDS differential dat a output 3
10 D11 TTL Input (G7) 38 TxOUT3- Negative LVDS differential data output 3
11 D12 TTL Input (G3) 39 TxCLKOUT+ Positive LVDS differential clock output
12 D13 TTL Input (G4) 40 TxCLKOUT- Negative LVDS differential cl ock output
13 GND Ground pin for TTL 41 TxOUT2+ Positive LVDS diff erential data output 2
14 D14 TTL Input (G5) 42 TxOUT2- Negative LVDS differential data output 2
15 D15 TTL Input (B0) 43 LVDS GND Ground pin for LVDS
16 D16 TTL Input (B6) 44 LVDS Vcc Power supply for LVDS
17 Vcc Power supply for TTL input 45 TxOUT1+ Positive LVDS differential data output 1
18 D17 TTL Input (B7) 46 TxOUT1- Negative LVDS differential data output 1
19 D18 TTL Input (B1) 47 TxOUT0+ Positive LVDS differential data output 0
20 D19 TTL Input (B2) 48 TxOUT0- Negative LVDS differential data output 0
21 GND Ground pin for TTL 49 LVDS GND Ground pin for LVDS

22
23
24
25

26 Vcc Power supply for TTL input 54 D2 TTL Input (R2)
27 D24 TTL Input (Hsync) 55 D3 TTL Input (R3)
28 D25 TTL Input (Vs ync ) 56 D4 TTL Input (R4)

D20 TTL Input (B3) 50 D27 TTL Input (R6)
D21 TTL Input (B4) 51 D0 TTL Input (R0)
D22 TTL Input (B5) 52 D1 TTL Input (R1)
D23 TTL I nput (RSVD) 53 GND Ground pin for TTL

Notes : Refer to LVDS Transmitter Data Sheet for detail descriptions.

Ver 1.0 SEP 30, 2000 Page 8/24

LM157E2-

A2

Product Specification

3-3. Signal Timing Specification

This is the signal tim ing r equired at the input of the LVDS T r ans mitter. All of the inter f ac e s ignal timing
should be satisfied with the following specifications for it’s proper operation.

Table 6. Timing Table

ITEM SYMBOL MIN. TYP. MAX. UNIT NOTE

Dclk Period t

Period t

Hsync

Width t

Period t

Vsync

Period t

Width t

DE

Horizontal

( Data

Back Porch

Enable )

Horizontal

Active

Horizontal

Front Porch

Vertical

Back Porch

Vertical

Active

Vertical

Front Porch

20.00 18.52 18.18 ns 1
730 844 -

856-

- 16.67 -

1032 1066 -

23-

12 124 -

t

CLK

HP

WH

VP

VP

WV

HBP

- - 640 -

t

t

HFP

VBP

624-

138-

- - 1024 -

t

VFP

11-

t

t

t

t

t

CLK

ms

HP

CLK

HP

HP

Note 1. Two pixel data are sampled at the same time.

Pixel

0,0

Pixel

0,1

Pixel

0,1023

Pixel

1,0

Pixel

1,1

Pixel

1,1023

pixel

2,0

pixel

2,1

pixel

2,1023

pixel

3,0

pixel

3,1

pixel

3,1023

1278,0
1278,1

1278,1023

Ver 1.0 SEP 30, 2000 Page 9/24

pixel
pixel

pixel

pixel

1279,0

pixel

1279,1

pixel

1279,1023

3-4. Signal Timing Wave Form

,

Hsync,

Hsync, Vsync, DE, DATA

Hsync, Hsync,

tttt

CLK

CLK

CLKCLK

DCLK

DCLK

DCLKDCLK

INVALID

INVALID

INVALIDINVALID

First DATA

First DATA

First DATAFirst DATA

INVALID

INVALID

INVALIDINVALID

Second DATA

Second DATA

Second DATASecond DATA

Vsync, DE, DATA

Vsync, DE, DATAVsync, DE, DATA

0.5V

0.5V

0.5V0.5V

CC

CC

CCCC

pixel pixel

pixel pixel

1,0 3,0

Product Specification

0.7Vcc

0.7Vcc

0.7Vcc0.7Vcc

0.3Vcc

0.3Vcc

0.3Vcc0.3Vcc

VALID DATA

VALID DATA

VALID DATAVALID DATA

0

0 2,0

VALID DATA

VALID DATA

VALID DATAVALID DATA

LM157E2-

A2

INVALID

INVALID

INVALIDINVALID

INVALID

INVALID

INVALIDINVALID

DE(Data Enable)

DE(Data Enable)

DE(Data Enable)DE(Data Enable)

HSync

HSync

HSyncHSync

DE

DE

DEDE

tttt

WH

WH

WHWH

tttt

VSync

VSync

VSyncVSync

DE

DE

DEDE

tttt

HP

HP

HPHP

tttt

HBP

HBP

HBPHBP

tttt

VP

VP

VPVP

tttt

VBP

VBP

VBPVBP

tttt

HFP

HFP

HFPHFP

tttt

VFP

VFP

VFPVFP

Ver 1.0 SEP 30, 2000 Page 10/24

LM157E2-

A2

Product Specification

3-5. Color Input Data Reference

The brightness of each primary color(red, gr een and blue) is based on the 8-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 7. COLOR DATA REFERENCE

Input Color Data

Basic

Colors

Color

Black
Red(255)
Green(255)
Blue(255)
Cyan
Magenta
Yellow
White

Red

MSB LSB

R7 R6 R5 R4 R3 R2 R1 R0 G7 G6 G5 G4 G3 G2 G1 G0 B7 B6 B5 B4 B3 B2 B1 B0

0

0

0

0

0

0

1

1

1

1

1

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

MSB LSB

0

0

0

1

1

0

0

0

1

0

0

0

0

0

1

1

1

0

1

1

1

1

1

1

Green

MSB LSB

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

1

0

0

1

1

1

1

1

1

1

1

1

Blue

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

0

0

1

1

1

1

1

1

0

0

1

1

Red

Green

Blue

Red(000) Dark
Red(001)
Red(002)

Red(253)
Red(254)
Red(255) Bright

Green(000)Dark
Green(001)
Green(002)

Green(253)
Green(254)
Green(255)Bright

Blue(000) Dark
Blue(001)
Blue(002)

Blue(253)
Blue(254)
Blue(255) Bright

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

1

1

1

1

1

1

0

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

0

0

0

0

0

0

0

0

0

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

0

0

0

0

0

0

0

0

1

1

1

1

1

1

0

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

0

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

0

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

Ver 1.0 SEP 30, 2000 Page 11/24

3-6. Power Sequences

Power Supply For LCD

V

CC

0V

0V

0V0V

Product Specification

90%

90%

90%90%

0%

0%0%

TTTT

2222

TTTT



LM157E2-

A2

90%

90%

90%90%

0%

0%0%

0%0%

TTTT

7777

TTTT

6666

TTTT

5555

Interface Signal,

Valid

Valid

V

i

ValidValid

(LVDS Signal of Transmitter)

0V

0V

0V0V

TTTT

3333

OFF

Power for Lamp

Parameter

T

1

T

2

T

3

T

4

T

5

T

6

T

7

OFF LAMP ON

OFFOFF

Values

Min. Typ. Max.

-

0.01
200
200

0.01

0.01

3

-

-

-

-

-

-

-

LAMP ON

LAMP ONLAMP ON

10
50

-

­20
10

-

Units

ms
ms
ms
ms
ms
ms

s

Notes: 1. Please avoid floating state of interface signal at invalid period.

2. When the interface signal is invalid, be sure to pull down the power supply for LCD V
Invalid input with Vcc for a long time, cause permanent damage to LCD panel.

3. Lamp power must be turn on after power supply for LCD and interface signal are valid.

TTTT

4444

OFF

OFF

OFFOFF

to 0V.

CC

Ver 1.0 SEP 30, 2000 Page 12/24

LM157E2-

A2

Product Specification

4. Optical Specifications

Optical characteristics are determined after the unit has been ‘ON’ and stable for approximately 30
minutes in a dark environm ent at 25. The values specified are at an approximate distanc e 50cm f rom
the LCD surface at a viewing angle of Φ and θ equal to 0°.
Appendix A -1 presents additional information concerning the measurement equipment and method..

Table 8. OPTICAL CHARACTERISTICS

Parameter Symbol

Min. Typ. Max.

Contrast Ratio CR 200 250 - - 1
Surface Luminance, white L

Luminance Variation



Response Time
Rise Time
Decay Time

WH

WHITE

Tr

Tr

R

Tr

D

170 200 - cd/m

-

-

CIE Color Coordinates
Red

Green

Blue

White

x

R

y

R

x

G

y

G

x

B

y

B

x

W

y

W

0.602

0.321

0.282

0.546

0.120

0.086

0.283

0.299

Values

6

19

0.632

0.351

0.312

0.576

0.150

0.116

0.313

0.329

Units Notes

2

1.30 - 3

15

msec

30

0.662

0.381

0.342

0.606

0.180

0.146

0.342

0.359

2

4

Viewing Angle
x axis, right (=0º)

x axis, left(=180º)
y axis, up(=90º)
y axis, down (=270º)

x



x



y



y



+60

-60

+45

-45

-

-

-

-

Degree

Gamma Value(reference value) 2.6 6
Crosstalk 2.5 % 7
Flicker -23 -20 dB 8

Notes 1. Contrast Ratio (CR) is defined mathematically as :

Surface Luminance with all white pixels

Contrast Ratio =

Surface Luminance with all black pixels

Surface Luminance with all black pixels

Surface Luminance with all black pixels Surface Luminance with all black pixels

2. Surface luminance is the center point across the LCD surf ace 50cm from the surface with all
pixels displaying white. For more information see Appendix A - 2.

3. The variation in surface Luminance,
position 1 through 5, and then dividing the max imum L

of 5 points luminance. For more information see Appendix A - 2.

L

ON



 Maximum (L

WHITE

ON1



, L

is determined by measuring LON at each test

WHITE

of 5 points luminance by minim um

ON

ON2

, ....L

)  Minimum (L

ON5

ON1

, L

ON2

, ....L

ON5

5

)

Ver 1.0 SEP 30, 2000 Page 13/24

LM157E2-

((

A2

Product Specification

4. Response time is the time r equired for the display to transition from blac k to white (Rise Tim e,

) and from white to black (Decay Time, TrD). For additional information see Appendix A - 3.

Tr

R

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 ver tical or y axis with res pect to the z axis which is
normal to the LCD surface. For more information see Appendix A - 4

6.Gray scale specification is as following.

Gray Level

L0 0.01
L31 0.37
L63 0.98
L95 3.93

L127 9.60
L159 19.5
L191 39.7
L223 62.7
L255 100

7. Cross talk shall be measured at the V and H position.(Window size : 256 x 204 pixels)

For more information see Appendix A-5

Crosstalk Ratio =

Luminance at Pattern A - Luminance at pattern B

Luminance

(%)(min)

Luminance at pattern B

Luminance

(%)(typ)

0.26 0.51

0.97 1.57

2.48 3.98

6.83 9.73

14.8 20.2

29.3 39.1

51.0 62.3

72.9 83.1
100 100

Luminance

(%)(max)

 ×

100(%)

8. Flicker shall be measured at the center location.
Test pattern : Pixel pattern

Background RGB gray(0, 0, 0)
Foreground RGB gray(127, 127, 127)

AC at

(

5. Mechanical Characteristics

Ver 1.0 SEP 30, 2000 Page 14/24

Test

 =

 =

 = =

20 log

(

DC level

LM157E2-

A2

Product Specification

The chart below provides general mechanical characteristics for the model LM157E2-A2 LCD. In
addition, the figure below is a detailed mechanical drawing of the LCD. Note that dimensions are given for
reference purposes only.

Parameters Value unit Notes

Outside dimensions
Horizontal
Vertical
Depth

Bezel area
Horizontal
Vertical

Active Display area
Horizontal
Vertical

Weight 1140(typ) gram -

335

273.5

11.2

314.2

252.0

311.040

248.832

mm -

mm -

mm -

Surface Treatment

Hard coating 3H.

Anti-glare treatment of the

front polarizer

--

Ver 1.0 SEP 30, 2000 Page 15/24

< FRONT VIEW >

LM157E2-

A2

Product Specification

Ver 1.0 SEP 30, 2000 Page 16/24

Product Specification

LM157E2-

A2

Ver 1.0 SEP 30, 2000 Page 17/24

< REAR VIEW >

6. Reliability

- Environment test condition
No. Test ITEM Conditions

1 High temperature storage test Ta = 60 240h
2 Low temperature storage test Ta = -20 240h
3 High temperature operation test Ta = 50 50%RH 240h
4 Low temperature operation test Ta = 0 240h

5 Humidity Condition operation 20%RH ~ 80%RH
6 Humidity Condition storage 5%RH ~ 90%RH

Vibration test

7

(non-operating)

Shock test

8

(non-operating)

LM157E2-

A2

Product Specification

Wave Form: Random
Vibration Level: 1.0Grms
Bandwidth: 10~500Hz
Duration: 20min/Axis(X,Y,Z)
One time each direction
Shock Level: 120G
Wave Form: Half Sine Wave, 2ms
Direction: X, Y, Z,

One time each direction

Altitude

9

storage/shipment 0 - 53,300 feet

{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.

Ver 1.0 SEP 30, 2000 Page 18/24

LM157E2-

A2

Product Specification

7. International Standards

7-1. Safety

a) UL 1950 Third Edition, Underwriters Laboratories, Inc. Jan. 28, 1995.
Standard for Safety of Information Technology Equipment Including Electrical Business
Equipment.
b) CAN/CSA C22.2 No. 950-95 Third Edition, Canadian Standards Association, Jan. 28, 1995.
Standard for Safety of Information Technology Equipment Including Electrical Business
Equipment.
c) EN 60950 : 1992 + A1 : 1993 + A2 : 1993 + A3 : 1995 + A4 : 1997 + A11 : 1997
IEC 950 : 1991 + A1 : 1992 + A2 : 1993 + A3 : 1995 + A4 : 1996
European Committee for Electrotechnical Standardization (CENELEC)
EUROPEAN STANDARD for Safety of Information Technology Equipment Including Electrical
Business Equipment.

7-2. EMC

a) ANSI C63.4 “Methods of Measurement of Radio-Noise Emissions from Low-Voltage Electrical
and Electronic Equipment in the Range of 9kHz to 40GHz.” American National Standards
Institute(ANSI),1992.
b) C.I.S.P.R “Limits and Methods of Measurement of Radio Interference Characteristics of
Information Technology Equipment.” International Special Committee on Radio Interference
(standards apply by CISPR22 Class-B)
c) EN 55022 “Limits and Methods of Measurement of Radio Interference Characteristics of
Information Technology Equipment.” European Committee for Electrotechnical
Standardization (CENELEC),1988

Ver 1.0 SEP 30, 2000 Page 19/24

8. Packaging

8-1. Designation of Lot Mark

a) Lot Mark

LM157E2-

A2

Product Specification

KJIHGFEDCBA L

A, B, C : INCH CODE
D : YEAR
E : MONTH
F, G : PANEL CODE
H : ASSEMBLY CODE
I, J, K, L, M : SERIAL NO.

Note : 1. YEAR

YEAR 96 97 98 99 2000 2001 2002 2003 2004 2005 2006

Mark67890123456

2. MONTH

MONTH Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec.

Mark123456789ABC

b) Location of Lot Mark

MMMM

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 : 8 pcs
b) Box Size : 344mm315mm410mm

Ver 1.0 SEP 30, 2000 Page 20/24

LM157E2-

A2

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 user holes arranged in four corners.
(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 with a transparent protective plate in order to protect the polarizer LC cell.
Transparent protective plate should have sufficient strength in order to 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 polarizer with glass, tweezers or anything harder than HB

pencil head 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 soaked with petroleum benzene. Normal-hexane is recommended for cleaning the

adhesives used to attach front / rear polarizer. 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.

9.2 OPERATING PRECAUTIONS

(1) The spike noise causes the malfunction 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) A module has high frequency circuit. If you need to shield the electromagnetic noise, please do

co-work together.

9.3 ELECTROSTATIC DISCHARGE CONTROL

Since a module is com posed of electronic circuits. it is not strong to electrostatic discharge. Mak e

certain that treatment pers ons are connected to ground through wrist band etc. . . And don’t touch

I/F pin directly.

9.4 PRECAUTION 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 and 35 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.

Ver 1.0 SEP 30, 2000 Page 21/24

LM157E2-

A2

Product Specification

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 adhesive tape. If some stress

is applied to rub the protection film against the polarizer during the time you peel off the film, the

adhesive tape 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 adhesive tape still on the polarizer after the protection film is peeled off.

(4) You can remove the adhesive easily. When the adhesive 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.

Ver 1.0 SEP 30, 2000 Page 22/24

LM157E2-

Product Specification

APPENDIX
A-1 Optical Characteristic Measurement Equipment and Method

Optical Stage(x,y)

LCD Module

A2

A-2 Luminance Measurement

320

320320

2222

4444

Field = 

500mm

640320

640640



°

960

960640

960960

Prichard PR-880 or
equivalent

256

256

3333

5555

256256

52

52

5252

768

768

768768

<Measuring point for luminance variation & surface luminance>

A-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”.

R

Tr

%

100

90

Optical
Response

10

Ver 1.0 SEP 30, 2000 Page 23/24

white

0

black

D

Tr

white

A-4 Viewing angle

<Definition of viewing angle range>

Product Specification

θ

 0

φ

 90

2:00)

yu

z

θ

LM157E2-

A2

A

φ

φ





180

xl

9:00)

A-5 Crosstalk Measurement

: (

L

Crosstalk

(

L



A[or C]2-LA[or C]1

L



B[or D]2-LB[or D]1

, L

A[or C]1

B[or D]1

TFT LCD
MODULE

, L

/L



A[or C]1

/L



B[or D]1

, L

A[or C]2

A(640,128)

φ

 0

3:00)

xr

φ

z' yd

)

100(%)[vertical],

××××

)

100(%)[horizontal]

××××

is luminance of pattern1,2 at position A, B, C, D

B[or D]2

 270

6:00)

D(160,512)

Pattern 1

Background : Mid-gray

B(1120,512)

C(640,896)

Pattern 2

Window : Black/White

Background : Mid-gray

Window Size : 50%

Ver 1.0 SEP 30, 2000 Page 24/24