NEC NL6448BC26-09C DATA SHEET

TFT COLOR LCD MODULE

NL6448BC26-09C

21 cm (8.4 Type)

VGA

DATA SHEET

DOD-PP-0285 (4th edition)

This DATA SHEET is updated document from
DOD-PP-0143(3).

All information is subject to change without notice.
Please confirm the sales representative before
starting to design your system.

Document Number: DOD-PP-0285 (4th edition)
Published date: July 2007 CP(N)

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© NEC LCD Technologies, Ltd.

2006-2007, All rights reserved.

NL6448BC26-09C

INTRODUCTION

The Copyright to this document belongs to NEC LCD Technologies, Ltd. (hereinafter called "NEC").

No part of this document will be used, reproduced or copied without prior written consent of NEC.

NEC does and will not assume any liability for infringement of patents, copyrights or other intellectual
property rights of any third party arising out of or in connection with application of the products
described herein except for that directly attributable to mechanisms and workmanship thereof. No license,
express or implied, is granted under any patent, copyright or other intellectual property right of NEC.

Some electronic parts/components would fail or malfunction at a certain rate. In spite of every effort to
enhance reliability of products by NEC, the possibility of failures and malfunction might not be avoided
entirely. To prevent the risks of damage to death, human bodily injury or other property arising out
thereof or in connection therewith, each customer is required to take sufficient measures in its safety
designs and plans including, but not limited to, redundant system, fire-containment and anti-failure.

The products are classified into three quality grades: "Standard", "Special", and "Specific" of the
highest grade of a quality assurance program at the choice of a customer. Each quality grade is designed
for applications described below. Any customer who intends to use a product for application other than
that of Standard quality grade is required to contact an NEC sales representative in advance.

The Standard quality grade applies to the products developed, designed and manufactured in
accordance with the NEC standard quality assurance program, which are designed for such application as
any failure or malfunction of the products (sets) or parts/components incorporated therein a customer uses
are, directly or indirectly, free of any damage to death, human bodily injury or other property, like general
electronic devices.

Examples: Computers, office automation equipment, communications equipment, test and measurement

equipment, audio and visual equipment, home electronic appliances, machine tools, personal
electronic equipment, industrial robots, etc.

The Special quality grade applies to the products developed, designed and manufactured in accordance
with an NEC quality assurance program stricter than the standard one, which are designed for such
application as any failure or malfunction of the products (sets) or parts/components incorporated therein a
customer uses might directly cause any damage to death, human bodily injury or other property, or such
application under more severe condition than that defined in the Standard quality grade without such
direct damage.

Examples: Control systems for transportation equipment (automobiles, trains, ships, etc.), traffic control

systems, anti-disaster systems, anti-crime systems, medical equipment not specifically
designed for life support, safety equipment, etc.

The Specific quality grade applies to the products developed, designed and manufactured in accordance
with the standards or quality assurance program designated by a customer who requires an extremely
higher level of reliability and quality for such products.

Examples: Military systems, aircraft control equipment, aerospace equipment, nuclear reactor control

systems, medical equipment/devices/systems for life support, etc.

The quality grade of this product is the "Standard" unless otherwise specified in this document.

DATA SHEET DOD-PP-0285 (4th edition)

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NL6448BC26-09C

CONTENTS

INTRODUCTION ........................................................................................................................................

1. OUTLINE..................................................................................................................................................

1.1 STRUCTURE AND PRINCIPLE ........................................................................................................

1.2 APPLICATION....................................................................................................................................

1.3 FEATURES..........................................................................................................................................

2. GENERAL SPECIFICATIONS..............................................................................................................

3. BLOCK DIAGRAM.................................................................................................................................

4. DETAILED SPECIFICATIONS.............................................................................................................

4.1 MECHANICAL SPECIFICATIONS...................................................................................................

4.2 ABSOLUTE MAXIMUM RATINGS..................................................................................................

4.3 ELECTRICAL CHARACTERISTICS.................................................................................................

4.3.1 LCD panel signal processing board.............................................................................................

4.3.2 Backlight lamp.............................................................................................................................

4.3.3 Power supply voltage ripple.......................................................................................................

4.3.4 Fuse............................................................................................................................................

4.4 POWER SUPPLY VOLTAGE SEQUENCE.....................................................................................

4.4.1 LCD panel signal processing board...........................................................................................

4.4.2 Inverter (Option)........................................................................................................................

4.5 CONNECTIONS AND FUNCTIONS FOR INTERFACE PINS......................................................

4.5.1 LCD panel signal processing board...........................................................................................

4.5.2 Backlight lamp...........................................................................................................................

4.5.3 Positions of plug and socket ......................................................................................................

4.6 DISPLAY COLORS AND INPUT DATA SIGNALS.......................................................................

4.7 DISPLAY POSITIONS......................................................................................................................

4.8 SCANNING DIRECTIONS........................................................................................................ .......

4.9 INPUT SIGNAL TIMINGS ...............................................................................................................

4.9.1 Outline of input signal timings ..................................................................................................

4.9.2 Timing characteristics................................................................................................................

4.9.3 Input signal timing chart............................................................................................................

4.10 OPTICS.............................................................................................................................................

4.10.1 Optical characteristics..............................................................................................................

4.10.2 Definition of contrast ratio.......................................................................................................

4.10.3 Definition of luminance uniformity.........................................................................................

4.10.4 Definition of response times....................................................................................................

4.10.5 Definition of viewing angles....................................................................................................

5. RELIABILITY TESTS ..........................................................................................................................

6. PRECAUTIONS .....................................................................................................................................

6.1 MEANING OF CAUTION SIGNS....................................................................................................

6.2 CAUTIONS........................................................................................................................................

6.3 ATTENTIONS....................................................................................................................................

6.3.1 Handling of the product.............................................................................................................

6.3.2 Environment...............................................................................................................................

6.3.3 Characteristics............................................................................................................................

6.3.4 Other..........................................................................................................................................

7. OUTLINE DRAWINGS.........................................................................................................................

7.1 FRONT VIEW....................................................................................................................................

7.2 REAR VIEW ......................................................................................................................................

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DATA SHEET DOD-PP-0285 (4th edition)

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1. OUTLINE

1.1 STRUCTURE AND PRINCIPLE

Color LCD module NL6448BC26-09C is composed of the amorphous silicon thin film transistor
liquid crystal display (a-Si TFT LCD) panel structure with driver LSIs for driving the TFT (Thin Film
Transistor) array and a backlight.

The a-Si TFT LCD panel structure is injected liquid crystal material into a narrow gap between the
TFT array glass substrate and a color-filter glass substrate.

Color (Red, Green, Blue) data signals from a host system (e.g. signal generator, etc.) are modulated
into best form for active matrix system by a signal processing circuit, and sent to the driver LSIs which
drive the individual TFT arrays.

The TFT array as an electro-optical switch regulates the amount of transmitted light from the backlight
assembly, when it is controlled by data signals. Color images are created by regulating the amount of
transmitted light through the TFT array of red, green and blue dots.

1.2 APPLICATION

• For industrial use

1.3 FEATURES

• Adoption of ST-NLT (Super-Transmissive Natural Light TFT)

• High luminance

• High contrast

• Low reflection

• Wide viewing angle

• Wide temperature range

• 6-bit digital RGB signals

• Reversible-scan direction

• Edge light type (without inverter)

• Replaceable lamp for backlight

• Acquisition product for UL60950-1/CSA-C22.2 No.60950-1-03 (File number: E170632)

• Compliance with the European RoHS directive (2002/95/EC)

NL6448BC26-09C

DATA SHEET DOD-PP-0285 (4th edition)

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2. GENERAL SPECIFICATIONS

Display area

NL6448BC26-09C

170.88 (H) × 128.16 (V) mm

Diagonal size of display
Drive system
Display color
Pixel
Pixel arrangement
Dot pitch
Pixel pitch
Module size
Weight
Contrast ratio

Viewing angle

Designed viewing direction

Polarizer surface

21cm (8.4inches)
a-Si TFT active matrix
262,144 colors
640 (H) × 480 (V) pixels
RGB (Red dot, Green dot, Blue dot) vertical stripe

0.089 (H) × 0.267 (V) mm

0.267 (H) × 0.267 (V) mm

200.0 (W) × 152.0 (H) × 10.5 (D) mm (typ.)
330g (typ.)
600:1 (typ.)

≥

At the contrast ratio

10:1

• Horizontal: Right side 80° (typ.), Left side 80° (typ.)

• Vertical: Up side 80° (typ.), Down side 60° (typ.)

At DPS= Low or open: Normal scan

• Viewing direction without image reversal: up side (12 o'clock)

• Viewing direction with contrast peak: down side (6 o'clock)

• Viewing angle with optimum grayscale (γ=2.2): normal axis

(perpendicular)

Clear + Antireflection (AR)

Polarizer pencil-hardness
Color gamut

Response time

Luminance

2H (min.) [by JIS K5400]

At LCD panel center

40% (typ.) [against NTSC color space]

Ton+Toff (10%

←→

90%)

25ms (typ.)

At IBL= 5.0mArms / lamp

750cd/m

2

(typ.)

6-bit digital signals for data of RGB colors,

Signal system

Dot clock (CLK), Data enable (DE),
Horizontal synchronous signal (Hsync),
Vertical synchronous signal (Vsync)

Power supply voltage

LCD panel signal processing board: 3.3V or 5.0V
Edge light type: 2 cold cathode fluorescent lamps

Replaceable part

Backlight

• Lamp holder set: Type No. 84LHS06

Recommended inverter (Option)

• Inverter: Type No. 84PW031, 84PW041

Power consumption

At IBL= 5.0mArms / lamp, Checkered flag pattern

5.3W (typ., Power dissipation of the inverter is not included.)

DATA SHEET DOD-PP-0285 (4th edition)

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k

3. BLOCK DIAGRAM

Host

LCD module (Product)

R0 to R5

G0 to G5

B0 to B5

CLK

Hsync

Vsync

DE

DPS

100Ω

100Ω

100Ω

100Ω

100Ω

100Ω

100Ω

47kΩ

GND
Note1
Note2

VCC

Fuse

FG
Note1
Note2

VDDB

GNDB
Note2

Note1: Relations between GND (Signal ground), FG (Frame ground) and VBLC (Lamp low voltage

terminal) in the LCD module are as follows.

GND - FG Connected
GND - VBLC Not connected
FG - VBLC Not connected

Note2: GND, FG and GNDB must be connected to customer equipment’s ground, and it is

recommended that these grounds are connected together in customer equipment.

Controller

Ω

47

Power supply

for gradation

DC/DC

converter

LCD panel signal processing board

VBLH

Inverter

VBLH

(Option)

VBLC
Note1

V-driver

NL6448BC26-09C

H-driver

1,920 lines

LCD panel

H: 640 × 3 (R, G, B)
V: 480

480 lines

Backlight (Edge light type)

Lamp

Lamp

DATA SHEET DOD-PP-0285 (4th edition)

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4. DETAILED SPECIFICATIONS

4.1 MECHANICAL SPECIFICATIONS

Parameter Specification Unit

NL6448BC26-09C

Module size

Display area

Weight 330 (typ.), 350 (max.) g

Note1: See "7. OUTLINE DRAWINGS".

4.2 ABSOLUTE MAXIMUM RATINGS

Parameter Symbol Rating Unit Remarks

Power supply

voltage

Input voltage

for signals

Operating temperature

LCD panel signal processing board VCC -0.3 to +6.5 V

Display signals

Function signal

Incident light intensity II 150,000 lx Note3

Storage temperature Tst -30 to +80

200.0 ± 0.5 (W) × 152.0 ± 0.5 (H) × 10.5 ± 0.5 (D)

170.88 (H) × 128.16 (V)

Lamp voltage VBLH 1,700 Vrms

Note1

Note2

Front surface TopF -20 to +70

Rear surface TopR -20 to +70

VD

-0.3 to VCC+0.3 V

VF

°C

°C

°C

Note1 mm
Note1 mm

-

-

Note4

Note5

%

%

%

%

g/m3

Ta≤ 40°C

40 <Ta≤ 50°C

50°C <Ta≤ 60°C

60°C <Ta≤ 70°C

Ta> 70°C

Relative humidity

Note6

Absolute humidity

Note6

RH

AH

≤ 95

≤ 85

≤ 55

≤ 36
≤ 70

Note7

Note1: CLK, Hsync, Vsync, DE, DATA (R0 to R5 , G0 to G5, B0 to B5)
Note2: DPS
Note3: If the product surface (polarizer) is exposed to an ultraviolet ray, the polarizer may discolor

(Surface treatment may be damaged.). Use a filter to protect the polarizer from the ultraviolet

ray.
Note4: Measured at center of LCD panel surface (including self-heat)
Note5: Measured at center of LCD module's rear shield surface (including self-heat)
Note6: No condensation
Note7: Water amount at Ta= 70°C and RH= 36%

DATA SHEET DOD-PP-0285 (4th edition)

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4.3 ELECTRICAL CHARACTERISTICS

4.3.1 LCD panel signal processing board

Parameter Symbol min. typ. max. Unit Remarks

Power supply voltage VCC

NL6448BC26-09C

(Ta= 25°C)

3.0 3.3 3.6 V at VCC= 3.3V

4.75 5.0 5.25 V at VCC= 5.0V

Power supply current ICC

Logic input voltage for

display signals

Input voltage for DPS

signal

High VDH 0.7VCC - VCC V

High VFH 0.7VCC - VCC V

-

-

Low VDL 0 - 0.3VCC V

Low VFL 0 - 0.3VCC V

280

Note1

180

Note1

380

Note2

250

Note2

mA at VCC= 3.3V

mA at VCC= 5.0V

CMOS level

Note1: Checkered flag pattern [by EIAJ ED-2522]
Note2: Pattern for maximum current

DATA SHEET DOD-PP-0285 (4th edition)

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× ×

4.3.2 Backlight lamp

Lamp current IBL 3.0 5.0 5.5 mArms

Lamp voltage VBLH - 435 - Vrms Note2, Note3

Lamp starting voltage VS

Lamp oscillation frequency FO 45 - 60 kHz Note6

Note1: This product consists of 2 backlight lamps, and these specifications are for each lamp.

Note2: The lamp voltage cycle between lamps should be kept on a same phase. "VS" and "VBLH"

Note3: The asymmetric ratio of working waveform for lamps (Power supply voltage peak ratio,

Note4: This product consists of 2 lamps. 2 lamps are contained in the 1 lamp holder, and both lamps

Note5: The inverter should be designed so that the lamp starting voltage can be maintained for more

Note6: In case "FO" is not the recommended value, beat noise may display on the screen, because of

voltage or asymmetric of lamp working waveform. When designing method of lamp cable installation,
evaluate the fluctuation of lamp current, voltage and working waveform sufficiently.

NL6448BC26-09C

(Ta= 25°C, Note1)

Parameter Symbol min. typ. max. Unit Remarks

at IBL= 5.0mArms:

L= 750cd/m
Note3, Note4

Ta= 25°C

1,050 - - Vrms

1,250 - - Vrms

Note2, Note3,

Note5, Note8

Ta= -20°C

Note2, Note3,

Note5, Note8

are the voltage value between low voltage side (Cold) and high voltage side (Hot).

power supply current peak ratio and waveform space ratio) should be less than 5 % (See the

following figure.). If the waveform is asymmetric, DC (Direct current) element apply into the

lamp. In this case, a lamp lifetime may be shortened, because a distribution of a lamp

enclosure substance inclines toward one side between low voltage terminal (Cold terminal)

and high voltage terminal (Hot terminal). When designing the inverter, evaluate asymmetric

of lamp working waveform sufficiently.

Pa

Pb

Sa

0

Sb

|Pa - Pb|

Pb

|Sa - Sb|

Sb

× 100 ≤ 5%

× 100 ≤ 5%

Pa: Supply voltage/current peak for positive, Pb: Supply voltage/current peak for negative
Sa: Waveform space for positive part, Sb: Waveform space for negative part.

are connected to 1 low voltage cable. Recommended lamp current is 5.0mArms typical for

each lamp, and sum of 2 lamps is 10mArms typical. The lamp current should be measured by

high-frequency current meter at the low voltage terminal.

than 1 second. Otherwise the lamp may not be turned on.

interference between "FO" and "1/th". Recommended value of "FO" is as following

FO

=

1
4

th

1

(2n-1)

th: Horizontal cycle (See "4.9.2 Timing characteristics".)
n: Natural number (1, 2, 3 ⋅⋅⋅⋅⋅⋅⋅⋅)

Note7: Method of lamp cable installation may invite fluctuation of lamp current and

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DATA SHEET DOD-PP-0285 (4th edition)

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