NEC NL6448BC33-50 DATA SHEET

TFT COLOR LCD MODULE

NL6448BC33-50

26cm (10.4 Type)

VGA

DATA SHEET

DOD-PP-0272 (4th edition)

This DATA SHEET is updated document from
DOD-PD-0854(3).

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

Document Number: DOD-PP-0272 (4th edition)
Published date: June 2007 CP(N)

1

© NEC LCD Technologies, Ltd.

2002-2007 All rights reserved.

NL6448BC33-50

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-0272 (4th edition)

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NL6448BC33-50

CONTENTS

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

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

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

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

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

2. GENERAL SPECIFICATIONS..............................................................................................................5

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 plugs and a 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....................................................................................................

4.10.6 Optical characteristics for reflective mode ..............................................................................

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.........................................................................................................................29

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

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

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DATA SHEET DOD-PP-0272 (4th edition)

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1. OUTLINE

1.1 STRUCTURE AND PRINCIPLE

Color LCD module NL6448BC33-50 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. PC, signal generator, etc.) are
modulated into best form for active matrix system by a signal processing board, 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 SR-NLT (Super-Reflective Natural Light TFT) (Transflective type)

• High luminance

• Wide viewing angle

• 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)

(From product which was produced after April. 1, 2006)

NL6448BC33-50

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DATA SHEET DOD-PP-0272 (4th edition)

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2. GENERAL SPECIFICATIONS

Display area
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
Polarizer pencil-hardness

Color gamut

Response time

Luminance

Reflectance (Reference)

Signal system

Power supply voltage

Backlight

NL6448BC33-50

211.2 (H) × 158.4 (V) mm
26 cm (10.4 inches)
a-Si TFT active matrix
262,144 colors
640 (H) × 480 (V) pixels
RGB (Red dot, Green dot, Blue dot) vertical stripe

0.1100 (H) × 0.3300 (V) mm

0.3300 (H) × 0.3300 (V) mm

243.0 (W) × 185.1 (H) × 11.0 (D) mm (typ.)
560 g (typ.)

At transmissive mode

100:1 (typ.)

At reflective mode

8:1 (typ.)

≥

←→

10:1

(perpendicular)

90%)

At transmissive mode, the contrast ratio

• Horizontal: Right side 55° (typ.), Left side 75° (typ.)

• Vertical: Up side 40° (typ.), Down side 55° (typ.)

At transmissive mode, DPS= Low or Open: Normal scan

• Viewing direction without image reversal: down side (6 o'clock)

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

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

Clear + Antireflection (AR)
2H (min.) [by JIS K5400]

At transmissive mode, LCD panel center

50 % (typ.) [against NTSC color space]

At reflective mode, LCD panel center

30 % (typ.) [against NTSC color space]

At transmissive mode, Ton+Toff (10%

25 ms (typ.)

At transmissive mode, IBL=5.0mArms / lamp

250 cd/m

2

(typ.)

At reflective mode

5.0 % (typ.)

6-bit digital signals for data of RGB colors,
Dot clock (CLK), Data enable (DE),
Horizontal synchronous signal (Hsync),
Vertical synchronous signal (Vsync)

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

Replaceable part

• Lamp holder set: Type No. 104LHS38

Recommended inverter (Option)

• Inverter: Type No. 104PW161, 104PW191

Power consumption

At IBL=5.0mArms / lamp, Checkered flag pattern

6.2W (typ., Power dissipation of the inverter is not included.)

DATA SHEET DOD-PP-0272 (4th edition)

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3. BLOCK DIAGRAM

Host

R0 to R5

G0 to G5

B0 to B5

CLK

LCD module (Product)

100Ω

100Ω

100Ω

100Ω

Hsync

Vsync

DE

100Ω

100Ω

100Ω

DPS

47kΩ

Note3

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 Not 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

Power supply

for gradation

DC/DC

converter

LCD panel signal processing board

Inverter

(Option)

VBLH

VBLH

VBLC

Note1

V-driver

H-driver

1,920 lines

H: 640 × 3 (R, G, B)

480 lines

V: 480

Backlight (Edge light type)

Lamp

Lamp

Metallic frame of lamp holder

NL6448BC33-50

LCD panel

DATA SHEET DOD-PP-0272 (4th edition)

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Note3: Pull-down resistance of DPS pin

VCC

at 3.3V 6.4 11.4 18.3
at 5.0V 4.5 8.2 14.0

4. DETAILED SPECIFICATIONS

4.1 MECHANICAL SPECIFICATIONS

Parameter Specification Unit

NL6448BC33-50

Pull-down resistance of DPS pin (kΩ) Power supply voltage

min. typ. max.

Module size
Display area

Weight 560 (typ.), 590 (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

Lamp voltage VBLH 1,500 Vrms

Display signals

Note1

Function signal

Note2

Incident light intensity II 150,000 lx Note3

Storage temperature Tst -20 to +80

Relative humidity

Note6

243.0 ± 0.5 (W) × 185.1 ± 0.5 (H) × 11.0 ± 0.5 (D)

211.2 (H) × 158.4 (V)

VD -0.3 to VCC+0.3 V

VF -0.3 to VCC+0.3 V

Front surface TopF 0 to +65

Rear surface TopR 0 to +70

≤ 95
≤ 85

RH

≤ 70
≤ 60

Note1 mm
Note1 mm

Ta = 25°C

°C
°C
°C

%
%
%
%

­Note4
Note5

Ta ≤ 40°C
40 < Ta ≤ 50°C
50 < Ta ≤ 55°C
55 < Ta ≤ 60°C

%

g/m

60 < Ta ≤ 65°C

3

Ta > 65°C

Absolute humidity

Note6

≤ 50

AH

≤ 80

Note7

Note1: Display signals are CLK, Hsync, Vsync, DE and DATA (R0 to R5, G0 to G5, B0 to B5).
Note2: Function signal is DPS.
Note3: If an ultraviolet ray is directly irradiated to the product surface (polarizer), 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 = 65°C and RH = 50%

DATA SHEET DOD-PP-0272 (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

NL6448BC33-50

(Ta = 25°C)

Power supply voltage VCC

Power supply current ICC

Permissible ripple voltage VRP - - 100 mV for VCC

Logic input voltage for

display signals

Input voltage for DPS signal

High VDH 0.7VCC - VCC V

Low VDL 0 - 0.3VCC V

High VFH 0.7VCC - VCC V

Low VFL 0 - 0.4 V

3.0 3.3 3.6 V at VCC = 3.3V

4.75 5.0 5.25 V at VCC = 5.0V

-

-

310

Note1

210

Note1

500

Note2

330

Note2

mA at VCC = 3.3V

mA at VCC = 5.0V

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

CMOS level

DATA SHEET DOD-PP-0272 (4th edition)

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NL6448BC33-50

×

⏐

⏐

⏐

⏐

×

4.3.2 Backlight lamp (Ta=25°C, Note1)

Parameter Symbol min. typ. max. Unit Remarks

at IBL=5.0mArms:

Lamp current IBL 2.0 5.0 5.5 mArms

Lamp voltage VBLH - 520 - Vrms Note2, Note3

850 - - Vrms

Lamp starting voltage VS

1,100 - - Vrms

Lamp oscillation frequency FO 50 - 70 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"

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

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

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

Pa - Pb

Pb

100 ≤ 5 %

0

Sb

Sa - Sb

Sb

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

Note4: 2 backlight lamps contain in 1 lamp holder, and both lamps are connected to 1 low voltage

cable. Lamp current must be 5.0mArms typical for each lamp, and sum of 2 lamps must be

10.0mArms typical. The lamp current should be measured by high-frequency current meter at
the low voltage terminal.

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

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

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

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

FO

=

1
4

×

1

th

×

(2n-1)

th: Horizontal synchronous 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 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.

250cd/m

Note3, Note4

Ta = 25°C

Note2, Note3,

Note5, Note8

Ta = 0°C

Note2, Note3,

Note5, Note8

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DATA SHEET DOD-PP-0272 (4th edition)

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