NEC NL128102AC23-02A Datasheet

DATA SHEET

NL128102AC23-02A

TFT COLOR LCD MODULE

39 cm (15.4 inches), 1280

××××

1024 pixels, Full-color,

Multi-scan Function

Incorporated backlight with inverter

DESCRIPTION

NL128102AC23-02A is a TFT (thin film transistor) active matrix color liquid crystal display (LCD) comprising
amorphous silicon TFT attached to each signal electrode, a driving circuit and a backlight. NL128102AC23-02A
has a built-in backlight with an inverter.

The 39 cm (15.4 inches) diagonal display area contains 1280 × 1024 pixels and can display full-color (more than
16 million colors simultaneously). Also, it has multi-scan function.

NL128102AC23-02A is a model which mounted the CRT interface board on NL128102AC23-02.

FEATURES

• Wide viewing angle (with retardation film)

• CRT interface board

• Auto recognition of input signal (Analog RGB signals, Synchronous signals (Hsync, Vsync, Composite))

• Digital control: e.g., Brightness, Display position, contrast, CLK delay

• Free supply voltage sequence

• Corresponding to DDC

• Corresponding to VESA

• On Screen Display
Regarding the use of OSD, please note that there is possibility of conflicts with a patent in Europe and the
U.S. Thus, if such conflict might happen when you use OSD, we shall not be responsible for any trouble.

• Multi-scan function: e.g., SXGA, XGA, SVGA, VGA, VGA-TEXT, MAC

• Incorporated edge type backlight with an inverter (Four lamps into two lamp holders)

• Lamp holder replaceable
VESA : Video Electronics Standards Association
DPMS: Display Power Management Signaling

All trademarks used within this document are the property of their respective owners. VESA, DDC, DPMS and
EDID are trademarks of the Video Electronics Standard Association.

TM

1 and DDC2B

TM

, DPMS

TM

• High luminance (200 cd/m

• Low reflection

DDC1 : Display Data Channel 1
DDC2B: Display Data Channel 2B

2

, TYP.)

APPLICATIONS

• Desk-top type of PC

• Engineering work station

The information in this document is subject to change without notice.

Document No. EN0427EJ1V0DS00 (1st edition)
Date Published February 1999 P
Printed in Japan

1999©

NL128102AC23-02A

STRUCTURE AND FUNCTIONS

A color TFT (thin film transistor) LCD module is comprised of a TFT liquid crystal panel structure, LSIs for driving

the TFT array, and a backlight assembly. The TFT panel structure is created by sandwiching liquid crystal material
in the narrow gap between a TFT array glass substrate and a color filter glass substrate. After the driver LSIs are
connected to the panel, the backlight assembly is attached to the backside of the panel.

RGB (red, green, blue) data signals from a source system is modulated into a form suitable for active matrix

addressing by the onboard signal processor and sent to the driver LSIs which in turn addresses the individual TFT
cells.

Acting as an electro-optical switch, each TFT cell regulates light transmission from the backlight assembly when

activated by the data source. By regulating the amount of light passing through the array of red, green, and blue
dots, color images are created with clarity.

BLOCK DIAGRAM

Hsync/Csync

Vsync

LEDON

LEDOFF

LED00 to 12

SEL

UP

DOWN

EXIT

VOLSEL

OSDSEL

MENUSEL

DDCCLK
DDCDAT

WPRT

BRTVOL

DD

V

(+12 V)

GND

CLK

OSD

Sync.
Serial

POWER

LCD module

R
G
B

Timing
Controller

ON/OFF

DD

V

AIF

AMP

V-driver

H-driver

3840 lines

LCD panel

1024 lines

I/F Board

R
G
B

Sync.
Division

AMP

PLL

Controller
(Signal
recognition)

DC/DC
converter

2

Luminance
(on/off)

V

DD

B

(+12 V)

GNDB

Neither GND nor GNDB is connected to Frame.

Note

DC/DC
converter

Inverter

Data Sheet EN0427EJ1V0DS00

H: 1280 × 3 (R,G,B)
V: 1024

Backlight

NL128102AC23-02A

OUTLINE OF CHARACTERISTICS (at room temperature)

Display area 305.28 (H) × 244.224 (V) mm
Drive system a-Si TFT active matrix
Display colors Full-color
Number of pixels 1280 × 1024 pixels
Pixel arrangement RGB vertical stripe
Pixel pitch 0.2385 (H) × 0.2385 (V) mm
Module size 350.0 (H) × 284.8 (V) × 26.0 (max.) (D) mm
Weight 1700 g (TYP.)
Contrast ratio 200 : 1 (TYP.)
Viewing angle (more than the contrast ratio of 10 : 1)

Horizontal : 60° (TYP., left side, right side)

Vertical : 50° (TYP., up side), 45° (TYP., down side)
Color gamut 59% (TYP., at center, to NTSC)
Response time 7 ms (TYP.), white to black
Luminance 200 cd/m
Signal system Analog RGB signals, Synchronous signals (Hsync and Vsync or Composite),

CLK
Supply voltages 12 V (Logic/LCD driving), 12 V (Backlight)
Backlight Edge light type: Four cold cathode fluorescent lamps with an inverter

Power consumption 28.8 W (TYP.)

2

(TYP.)

[Replaceable parts]

• Lamp holder: type No. 154LHS02

• Inverter: type No. 154PW021

Data Sheet EN0427EJ1V0DS00

3

NL128102AC23-02A

GENERAL SPECIFICATIONS

Item Specification Unit
Module size 350.0 ± 0.6 (H) × 284.8 ± 0.6 (V) × 26.0 (MAX.) (D) mm
Display area 305.28 (H) × 244.224 (V) mm
Number of dots 1280 × 3 (H) × 1024 (V) dot
Number of pixels 1280 (H) × 1024 (V) pixel
Dot pitch 0.0795 (H) × 0.2385 (V) mm
Pixel pitch 0.2385 (H) × 0.2385 (V) mm
Pixel arrangement RGB (Red, Green, Blue) vertical stripe –
Display colors full color color
Weight 1760 (MAX.) g

ABSOLUTE MAXIMUM RATINGS

Parameter Symbol Rating Unit Remarks

V
Logic input voltage V
R,G,B input voltage V
CLK input voltage V
Storage temp. T
Operating temp. T
Humidity

≤
≤

Absolute humidity shall not exceed T
relative humidity level.

Measured at the LCD panel

Note

DD

V

DD

B –0.3 to +14 V

IN1

IN2

IN3

ST

OP

–0.3 to +14 VSupply voltage

–0.3 to +5.5 V
–6.0 to +6.0 V
–7.0 to +7.0 V

–20 to + 60 °C –

0 to +50 °C
95% relative humidity T
85% relative humidity

a

= 50°C, 85%

a

T

= 25°C

a

= 25°C

T

DD

= 12 V

V

Module surface

a

≤ 40°C
40 < Ta ≤ 50°C
Ta > 50°C

Note

No condensation

4

Data Sheet EN0427EJ1V0DS00

ELECTRICAL CHARACTERISTICS

(1) Logic, LCD driving, Backlight

Parameter Symbol MIN. TYP. MAX. Unit Remarks

VDDB 11.4 12.0 12.6 V for backlightSupply voltage

DD

V
Logic input Low voltage V
Logic input High voltage V

Logic output Low voltage V
Logic output High voltage V
Logic input Low current 1 I
Logic input High current 1 I
Logic input Low current 2 I
Logic input High current 2 I
Supply current

IL

IH

OL

OH

iL1

iH1

iL2

iH2

DD

I

DD

I

B

NL128102AC23-02A

T

11.4 12.0 12.6 V for logic and LCD driving
0–0.8V

2.0 – 5.25 V

––0.4V

2.4 – – V
–1 – –

––1
––1

–1 – –

µ
µ
µ
µ

– 1000 1500 mA for LCD driving

– 50 65 mA Power saving mode, VDD = 12.0 V

– 1400 1600 mA for back light

– 1 10 mA Power saving mode, V

Hsync/Csyn c, Vsync, SEL, UP,
DOWN, EXIT, VOLSEL, DDCDAT ,
DDCCLK, OSDSEL, WPRT,
MENUSEL

DDCDAT

Hsync/Csync, Vsync

A
A

DDCDAT

A
A

DD

= 12.0 V

V

DD

B = 12.0 V

V

DD

B = 12.0 V

a

= 25°C

Note

Note

Pixel checkered pattern

Note

(2) Video signal (R,G,B) input

Item MIN. TYP. MAX. Unit Remarks

Maximum amplitude (white - black) 0

(black)
DC input level (black) –0. 5 – +2.5 V –
Sync. level 0.2 0.3 *B Vp-p G terminal

*A + *B – – 1.1 Vp-p –

0.7

(white)

*A Vp-p Need to adjust contrast if input more

0.7 Vp-p

(Sync. On Green)

a

= 25°C

T

Data Sheet EN0427EJ1V0DS00

5

NL128102AC23-02A

POWER SUPPLY DESIGN

(1) Please note that the supply voltage must not be applied while the control signals (SEL, UP, DOWN, EXIT,

BRT+ and BRT–) are connected to GND. Otherwise the module may cause malfunction.

(2) If the power supply voltage is applied while UP and DOWN are connected to GND, the input control signals

become ineffective. In this case, please turn off the power once and turn on the power while UP and DOWN are
connected to GND again.

(3) Inverter current wave

Inverter current wave is as follows.

1400 (mA)

0 (A)

Duty

Luminance control frequency

Maximum luminance control: 100%
Minimum luminance control: 20%
Luminance control frequency Input Vsync frequency × K

(4) Ripple of supply voltage

Acceptable range

Remark

The acceptable range of ripple voltage includes spike noise.

Example of the power supply connection

a) Separate the power supply b) Put the filter

Power VDD

Power VDDB

=

Input Vsync frequency ≤ 75 Hz: K = 4.6
Input Vsync frequency > 75 Hz: K = 3.6

DD

V

(for logic and LCD driver)

≤

100 mVp-p

Power

DD

V

B

(for backlight)

≤

200 mVp-p

Filter* VDD

Filter* VDDB

6

Data Sheet EN0427EJ1V0DS00

NL128102AC23-02A

INTERFACE PIN CONNECTION

(1) Interface signals, power supply

CN101
Part No. : MRF03-6R-SMT
Adaptable socket : MRF03-6P-1.27 (For cable type) or MRF03-6PR-SMT (For board to board type)
Supplier : HIROSE ELECTRIC CO., LTD.

Pin No. Symbol Pin No. Sym bol

1B 4 Vsync
2 G 5 Hsync/Csync

N.C.

3R 6

N.C. (No connection) should be open.

Note

Note

CN102
Part No. : IL-Z-4PL-SMTY
Adaptable socket : IL-Z-4S-S125C3
Supplier : Japan Aviation Electronics Industry Limited (JAE)

Pin No. Symbol Pin No. Sym bol

1 DDCCLK 3 MENUSEL
2 DDCDAT 4 GND

CN103
Part No. : DF14A-25P-1.25H
Adaptable socket : DF14-25S-1.25C
Supplier : HIROSE ELECTRIC CO., LTD. (coaxial type)

Figure from socket view

······12 56

Figure from socket view

4321

Pin No. S ymbol Pin No. Symbol

1 LEDON 14 EXIT
2LEDOFF15 GND
3GND16BRTVOL
4 LED00 17 GND
5 LED01 18 VOLSEL
6 LED02 19 OSDSEL
7 LED10 20 WPRT
8 LED11 21 TEST1

9 LED12 22 TEST2
10 GND 23 GND
11 SEL 24 TEST3
12 UP 25 TEST4
13 DOWN

TEST1 to 4 should be open.

Note

Figure from socket view

····

1 2 24 25

Data Sheet EN0427EJ1V0DS00

7

CN104
Part No. : IL-Z-8PL-SMTY
Adaptable socket : IL-Z-8S-S125C3
Supplier : Japan Aviation Electronics Industry Limited (JAE)

NL128102AC23-02A

Pin No. S ymbol Pin No. Symbol

1VDD5GND

2VDD6GND

3VDD7GND

4VDD8GND

CN201
Part No. : IL-Z-11PL1-SMTY
Adaptable socket : IL-Z-11S-S125C3
Supplier : Japan Aviation Electronics Industry Limited (JAE)

Pin No. S ymbol Pin No. Symbol

1V

2V

3V

4 GNDB 10 N.C.

5 GNDB 11 N.C.

6 GNDB

DD

B 7 N.C.

DD

B 8 N.C.

DD

B 9 N.C.

Figure from socket view

87 21·····

Figure from socket view

11 10 2 1·····

N.C. (No connection) should be open.

Note

<Connector location>

Rear view

11

1

CN101

6

3

CN102

CN201

1

1
1

CN103

25
8

CN104

1

8

Data Sheet EN0427EJ1V0DS00

(2) Pin function

Symbol I/O Logic Description

NL128102AC23-02A

Hsync/
Csync

Vsync Input Negative Vertic al sync hronous si gnal i nput (TTL level)

R Input – Red video signal input (0.7 Vp-p, 75 Ω)
G Input – Green video signal input (0.7 Vp-p, 75 Ω)
B Input – Blue video signal input (0.7 Vp-p, 75 Ω)
SEL Input Negative Control function sel ect signal (TTL level)

UP Input Negative Control signal (TTL level)

DOWN Input Negative Control signal (TTL level)

EXIT Input Negative Control signal (TTL level)

OSDSEL Input –

MENUSEL Input – OSD design select signal

BRTVOL Input – Volume luminance control

VOLSEL Input – Luminance control select signal

DDCCLK Input P ositive CLK for DDC2B
DDCDAT Input/

LEDON Output Positive Indicator for LED power on

LEDOFF Output Positive Indicator for power save mode

Input Negative Horizontal synchronous signal input or composite synchronous signal input

(TTL level) , Positive/Negative auto recognition

Positive/Negative auto recognition, Cl ock i nput f o r DDC1

SEL is pulled up in the module.

Output

Detail of the functions are mentioned in
High or open: SEL off, Low: SEL on

The signal increases the value of the functions selected.
UP is pulled up in tha module.
High or open: UP off, Low: UP on

The signal decreases the value of the functions selected.
DOWN is pulled up in the module.
High or open: DOWN off, Low : Down on

The signal initializes the selected function.
EXIT is pulled up in the module.
High or open: EXIT off, Low: EXIT on

Display select signal
OSDSEL is pulled up in the module.
“H or open”: OSD display off (light on LED)
“L”: OSD display on (light off LED)
Details of the functions are mentioned in

MENUSEL is pulled up in the module.
“H or open”: OSD display No.2
“L”: OSD display No.1(Transparent background)
Detail of the functions are mentioned in

Detail of the functions are mentioned in

SELECTION

VOLSEL is pulled up in the module.
Details of the functions are mentioned in

SELECTION

Positive Data for DDC1/2B

read/write

“H”: LED select, “L”: Other status

“H”: power save mode select, “L”: Other status

CONTROL FUNCTIONS

CONTROL FUNCTIONS

OSD DESIGN SELECT

LUMINANCE CONTROL

LUMINANCE CONTROL

.

Data Sheet EN0427EJ1V0DS00

9

Symbol I/O Logic Description

NL128102AC23-02A

LED00 Output Positive
LED01 Output Positive
LED02 Output Positive
LED10 Output Negative
LED11 Output Negative
LED12 Output Negative
WPRT I nput Positive Select signal for DDC

TEST1 to 4 Output Positiv e Reserve. TEST 1 to 4 should be open.

DD

V
VDDB – – Power supply for backlight. +12 V (±5 %)
GND – – Ground for system. Signal ground for logic/LCD driving
GNDB – – Ground for backlight. GNDB is not connected to the module GND (FG).

Remark

– – Power supply for Logic and LCD driving +12 V (±5 %)

Frame ground, system ground and backlight ground are not connected into the module.

See detail of

FUNCTIONS

“open”: Reading mode, “L”: Writing mode

EQUIVALENT CIRCUIT FOR LEDS and CONTROL

(3) LUMINANCE CONTROL SELECTION

VOLSEL= “L” “Open”

Form Digital adjust Volume adjust

See

How to adjust

The status of VOLSEL is valid when the power is switched on.

Note

CONTROL FUNCTIONS

(4) FUNCTION DISPLAY SELECT

OSDSEL= “L” “Open”

Form OSD Display LED Dispaly

See

How to adjust

CONTROL FUNCTIONS

The variable resistor for luminance control should be 10
kΩ type, and zero point of the resistor corresponds to the
minimum of luminance.

BRTVOL GND

R

Maximum luminance (100%): R = 10 K
Minimum luminance (30%): R = 0
Mating variable resistor: 10 KΩ ±5%,
B curve, 1/10 W

See Example of LED circuit. (Next page)

Ω

Ω

The status of OSDSEL is valid when the power is switched on.

Note

OSD
Regarding the use of OSD, please note that there is possibility of conf licts w ith a patent in Europ e and the U .S.
Thus, if such conflict might happen when you use OSD, we shall not be responsible for any trouble.

10

Data Sheet EN0427EJ1V0DS00

(5) OSD DESIGN SELECT

MENUSEL= “L” “Open”

Form OSD display No. 1 OSD display No. 2

How to adjust

The status of MENUSEL is valid when the power is switched on.

Note

(6) Equivalent circuit

Symbol I/O Equivalent circuit

See

CONTROL FUNCTIONS
(OSD background is
transparent)

See

CONTROL FUNCTIONS

NL128102AC23-02A

LEDON
LEDOFF
LED00
LED01
LED02

LED10
LED11
LED12

Output RN2306 (Tos hi ba)

or equivalent

Output

Output N-c h Open Drai n Output

Output

Data Sheet EN0427EJ1V0DS00

11

<Recommendation circuit diagram>

Input LCD module Output

SEL

CN103

NL128102AC23-02A

Two color LED

R (330 Ω)

LEDON

LEDOFF

R (330 Ω)

UP

DOWN

EXIT

VOLSEL

OSDSEL

LED1

LED00

R (330 Ω)

LED2

LED3

LED4

LED01

R (330 Ω)

LED5

LED6

LED7

LED02

R (330 Ω)

LED8

LED9

<LED status>

LED1: Brightness
LED2: Contrast
LED3: Horizontal display period
LED4: CLK delay
LED5: Vertical position
LED6: Horizontal position
LED7: Reserve
LED8: All reset
LED9: Reserve

LED10
LED11
LED12

12

Data Sheet EN0427EJ1V0DS00