NEC NL6448BC20-21C Technical data
TFT COLOR LCD MODULE
NL6448BC20-21C
17cm (6.5 Type)
VGA
PRELIMINARY DATA SHEET
DOD-PP-0321 (2nd edition)
This PRELIMINARY DATA SHEET is updated
document from DOD-PP-0269(1).
All information is subject to change without notice.
Please confirm the sales representative before
starting to design your system.
Document Number: DOD-PP-0321 (2nd edition)
Published date: July 2007 CP(N)
1
© NEC LCD Technologies, Ltd.
2007 All rights reserved.
NL6448BC20-21C
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.
PRELIMINARY DATA SHEET DOD-PP-0321 (2nd edition)
2
NL6448BC20-21C
CONTENTS
INTRODUCTION ..........................................................................................................................................2
1. OUTLINE....................................................................................................................................................4
1.1 STRUCTURE AND PRINCIPLE...........................................................................................................4
1.2 APPLICA TION.......................................................................................................................................4
1.3 FEATURES.............................................................................................................................................4
2. GENERAL SPECIFICATIONS ................................................................................................................5
3. BLOCK DIAGRAM...................................................................................................................................6
4. DETAILED SPECIFICATIONS...............................................................................................................8
4.1 MECHANICAL SPECIFICATIONS......................................................................................................8
4.2 ABSOLUTE MAXIMUM RATINGS....................................................................................................8
4.3 ELECTRICAL CHARACTERISTICS...................................................................................................9
4.3.1 LCD panel signal processing board...............................................................................................9
4.3.2 Backlight......................................................................................................................................10
4.3.3 Power supply voltage ripple.........................................................................................................10
4.3.4 Fuse..............................................................................................................................................10
4.4 POWER SUPPLY VOLTAGE SEQUENCE........................................................................................11
4.4.1 LCD panel signal processing board.............................................................................................11
4.4.2 LED lighting circuit.....................................................................................................................11
4.5 CONNECTIONS AND FUNCTIONS FOR INTERFACE PINS.........................................................12
4.5.1 LCD panel signal processing board.............................................................................................12
4.5.2 Backlight lamp.............................................................................................................................13
4.5.3 Positions of plug and socket ........................................................................................................13
4.5.4 Connection between receiver and transmitter for LVDS .............................................................14
4.5.5 Input data mapping ......................................................................................................................17
4.6 DISPLAY COLORS AND INPUT DATA SIGNALS ..........................................................................19
4.6.1 Combinations between input data signals and FRC signal..........................................................19
4.6.2 16,777,216 colors.........................................................................................................................20
4.6.3 262,144 colors..............................................................................................................................21
4.7 DISPLAY POSITIONS.........................................................................................................................22
4.8 SCANNING DIRECTIONS.................................................................................................................22
4.9 INPUT SIGNAL TIMINGS..................................................................................................................23
4.9.1 Outline of input signal timings ....................................................................................................23
4.9.2 Timing characteristics..................................................................................................................24
4.9.3 Input signal timing chart..............................................................................................................25
4.10 OPTICS...............................................................................................................................................26
4.10.1 Optical characteristics................................................................................................................26
4.10.2 Definition of contrast ratio.........................................................................................................27
4.10.3 Definition of luminance uniformity...........................................................................................27
4.10.4 Definition of response times......................................................................................................27
4.10.5 Definition of viewing angles......................................................................................................27
5. RELIABILITY TESTS.............................................................................................................................28
6. PRECAUTIONS .......................................................................................................................................29
6.1 MEANING OF CAUTION SIGNS......................................................................................................29
6.2 CAUTIONS..........................................................................................................................................29
6.3 A TTENTI ONS......................................................................................................................................29
6.3.1 Handling of the product...............................................................................................................29
6.3.2 Environment.................................................................................................................................30
6.3.3 Characteristics..............................................................................................................................30
6.3.4 Other............................................................................................................................................30
7. OUTLINE DRAWINGS...........................................................................................................................31
7.1 FRONT VIEW......................................................................................................................................31
7.2 REAR VIEW ........................................................................................................................................32
REVISION HISTORY.................................................................................................................................33
PRELIMINARY DATA SHEET DOD-PP-0321 (2nd edition)
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1. OUTLINE
1.1 STRUCTURE AND PRINCIPLE
Color LCD module NL6448BC20-21C 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 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 ST-NLT (Super-Transmissive Natural Light TFT)
• High luminance
• High contrast
• Wide viewing angle
• Wide temperature range
• LVDS interface
• Reversible-scan direction
• Selectable 8bit or 6bit digital signals for data of RGB
• LED backlight type
• Replaceable LED holder for backlight
NL6448BC20-21C
PRELIMINARY DATA SHEET DOD-PP-0321 (2nd edition)
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2. GENERAL SPECIFICATIONS
Display area
Diagonal size of display
NL6448BC20-21C
132.48 (H) × 99.36 (V) mm
17cm (6.5 inches)
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
a-Si TFT active matrix
16,777,216 colors (At 8-bit input, FRC terminal= High)
262,144 colors (At 6-bit input, FRC terminal= Low or Open)
640 (H) × 480 (V) pixels
RGB (Red dot, Green dot, Blue dot) vertical stripe
0.0690 (H) × 0.2070 (V) mm
0.2070 (H) × 0.2070 (V) mm
153.0 (W) × 118.0 (H) × 9.0 (D) mm (typ.)
TBD g (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
Clear + Antireflection (AR)
3H (min.) [by JIS K5400]
2
2
Color gamut
Response time
Luminance
At LCD panel center
(36) % (typ.) [against NTSC color space]
Ton+Toff (10%
←→
90%)
25 ms (typ.)
At IL= 10 mA
800 cd/m
2
(typ.)
2
LVDS 1port
Signal system
(Receiver: THC63LVDF84B, THine Electronics Inc. or equivalent)
8bit/6bit digital signals for data of RGB colors, Dot clock (CLK),
Data enable (DE)
Power supply voltage
LCD panel signal processing board: 3.3V
LED backlight type:
Backlight
Replaceable part
• LED holder set: Type No. 65LHS13
Power consumption
At IL= 10 mA, Checkered flag pattern
TBD W (typ.)
PRELIMINARY DATA SHEET DOD-PP-0321 (2nd edition)
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3. BLOCK DIAGRAM
Host
D0+
D0D1+
D1D2+
D2D3+
D3-
CLK+
CLK-
MSL
DPS
FRC
GND
Note1
Note2
VCC
FG
Note1
Note2
Anode1-6
Cathode1-6
Note1: Relations between GND (Signal ground), FG (Frame ground) in the LCD module are as
follows.
GND - FG Connected
Note2: GND and FG must be conn ected to customer equipment’s ground, and it is recommended that
these grounds are connected together in customer equipment.
LCD module (Product)
100Ω
100Ω
100Ω
100Ω
Controller with receiver for LVDS
100Ω
Power supply
for gradation
47kΩ
50kΩ
50kΩ
DC/DC
Fuse
LCD panel signal processing board
converter
6
6
NL6448BC20-21C
H-driver
1,920 lines
LCD panel
H: 640 × 3 (R, G, B)
V: 480
480 lines
V-driver
Backlight Note3
PRELIMINARY DATA SHEET DOD-PP-0321 (2nd edition)
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NL6448BC20-21C
Note3: Backlight in detail
Anode 1
Cathode 1
Anode 2
Cathode 2
Anode 3
Cathode 3
Anode 4
Cathode 4
Anode 5
Cathode 5
Anode 6
Cathode 6
Backlight
PRELIMINARY DATA SHEET DOD-PP-0321 (2nd edition)
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4. DETAILED SPECIFICATIONS
4.1 MECHANICAL SPECIFICATIONS
Parameter Specification Unit
NL6448BC20-21C
Module size
Display area
Weight TBD (typ.), TBD (max.) g
Note1: See "7. OUTLINE DRAWINGS".
4.2 ABSOLUTE MAXIMUM RATINGS
Parameter Symbol Rating Unit Remarks
Power supply
voltage
Input voltage
for signals
Backlight
Operating temperature
LCD panel signal processing
Display signals
Function signal
Power dissipation PD 1.1 W per one circuit
Forward current IL Note4 mA
Pulse forward current IFP Note5 mA
Storage temperature Tst -30 to +80
Relative humidity
Note8
Absolute humidity
Note8
Note1: Display signals are D0+/-, D1+/-, D2+/-, D3+/- and CLK+/-.
Note2: Fu nction signal 1 is DPS, FRC.
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.
153.0 ± 0.5 (W) × 118.0 ± 0.5 (H) × 9 (typ)
132.48 (H) × 99.36 (V)
board
Note1
Note2
Front surface TopF -20 to +70
Rear surface TopR -20 to +70
VCC -0.3 to +4.0 V
VD
-0.3 to VCC+0.3 V
VF
RH
AH
≤ 95
≤ 85
≤ 55
≤ 36
≤ 70
Note9
Note1 mm
Note1 mm
-
per one circuit
°C
°C
°C
%
%
%
%
3
g/m
Note6
Note7
Ta ≤ 40°C
40°C <Ta≤ 50°C
50°C <Ta≤ 60°C
60°C <Ta≤ 70°C
Ta> 70°C
PRELIMINARY DATA SHEET DOD-PP-0321 (2nd edition)
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Note4: Forward current Note5: Pulse forward current
20
18
16
14
12
10
8
6
4
2
0
0
20 40 60 80 100
Allowable forward current IL (mA)
Operating temperature (rear surface)Ta [°C]
Note6: Measured at center of LCD panel surface (including self-heat)
Note7: Measured at center of LCD module's rear shield surface (including self-heat)
Note8: No condensation
Note9: Water amount at Ta = 70°C and RH = 36%
4.3 ELECTRICAL CHARACTERISTICS
4.3.1 LCD panel signal processing board
NL6448BC20-21C
(mA)
Allowable pulse forward current IFP
Duty ratio (%)
(Ta= 25°C)
Parameter Symbol min. typ. max. Unit Remarks
Power supply voltage VCC 3.0 3.3 3.6 V Power supply current ICC -
Permissible ripple voltage VRP - - 100 mVp-p for VCC
Differential input threshold
voltage for LVDS receiver
Terminating resistance RT - 100 -
Input voltage for
DPS, FRC and MSL signals
Input current for FRC and MSL
signal
High VTH - - +100 mV
Low VTL -100 - - mV
High VFH 0.7VCC - VCC V
VFL 0 - 0.3VCC V
Low
High IFH - - 300
IFL -300 - -
Low
TBD
Note1
TBD
Note2
mA at VCC = 3.3V
at VCM=1.2V
Note3
Ω
μA
μA
-
CMOS level
-
Note1: Checkered flag pattern [by EIAJ ED-2522]
Note2: Pattern for maximum current
Note3: Common mode voltage for LVDS receiver
PRELIMINARY DATA SHEET DOD-PP-0321 (2nd edition)
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4.3.2 Backlight
Parameter Symbol min. typ. max. Unit Remarks
Forward current IL - 10 TBD mA Note3
Forward Voltage VL - 26.82 TBD V at IL= 10 mA
Note1: Please drive with constant current .
Note2: The
Luminance uniformity may be changed depending on the current variation between 6 circuits.
It is recommended that the current value difference between each circuit is less than 5%.
Note3: See "4.2 ABSOLUTE MAXIMUM RATINGS Note4".
4.3.3 Power supply voltage ripple
This product works, even if the ripple voltage levels are beyond the permissible values as following
the table, but there might be noise on the display image.
Power supply voltage
NL6448BC20-21C
Ripple voltage Note1
(Measure at input terminal of power supply)
(Ta=25°C)
Unit
VCC 3.3V
≤ 100
Note1: The permissible ripple voltage includes spike noise.
4.3.4 Fuse
Parameter
VCC
Type Supplier
TBD TBD
Fuse
Rating Fusing current Remarks
TBD
TBD
TBD
Note1: The power supply capacity should be more than the fusing current. If it is less than the fusing
current, the fuse may not blow in a short time, and then nasty smell, smoke and so on may
occur.
mVp-p
Note1
PRELIMINARY DATA SHEET DOD-PP-0321 (2nd edition)
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