TFT COLOR LCD MODULE
NL6448BC20-18D
17cm (6.5 Type)
VGA
DATA SHEET
DOD-PP-0251 (6th edition)
This DATA SHEET is updated document from
DOD-PP-0124(5).
All information is subject to change without notice.
Please confirm the sales representative before
starting to design your system.
Document Number: DOD-PP-0251 (6th edition)
Published date: May 2007 CP(N)
1
© NEC LCD Technologies, Ltd.
2005-2007 All rights reserved.
NL6448BC20-18D
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-0251 (6th edition)
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NL6448BC20-18D
CONTENTS
INTRODUCTION ........................................................................................................................................2
1. OUTLINE..................................................................................................................................................4
1.1 STRUCTURE AND PRINCIPLE ........................................................................................................4
1.2 APPLICATION ....................................................................................................................................4
1.3 FEATURES ..........................................................................................................................................4
2. GENERAL SPECIFICATIONS..............................................................................................................5
3. BLOCK DIAGRAM .................................................................................................................................6
4. DETAILED SPECIFICATIONS.............................................................................................................7
4.1 MECHANICAL SPECIFICATIONS ...................................................................................................7
4.2 ABSOLUTE MAXIMUM RATINGS..................................................................................................7
4.3 ELECTRICAL CHARACTERISTICS.................................................................................................8
4.3.1 LCD panel signal processing board .............................................................................................8
4.3.2 Backlight lamp .............................................................................................................................9
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 Inverter.......................................................................................................................................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 plugs and a socket ..................................................................................................13
4.6 DISPLAY COLORS AND INPUT DATA SIGNALS.......................................................................14
4.7 DISPLAY POSITIONS ......................................................................................................................15
4.8 SCANNING DIRECTIONS ...............................................................................................................15
4.9 INPUT SIGNAL TIMINGS ...............................................................................................................16
4.9.1 Outline of input signal timings ..................................................................................................16
4.9.2 Timing characteristics................................................................................................................17
4.9.3 Input signal timing chart ............................................................................................................19
4.10 OPTICS.............................................................................................................................................22
4.10.1 Optical characteristics..............................................................................................................22
4.10.2 Definition of contrast ratio.......................................................................................................23
4.10.3 Definition of luminance uniformity .........................................................................................23
4.10.4 Definition of response times ....................................................................................................23
4.10.5 Definition of viewing angles....................................................................................................23
5. RELIABILITY TESTS ..........................................................................................................................24
6. PRECAUTIONS .....................................................................................................................................25
6.1 MEANING OF CAUTION SIGNS ....................................................................................................25
6.2 CAUTIONS ........................................................................................................................................25
6.3 ATTENTIONS....................................................................................................................................25
6.3.1 Handling of the product .............................................................................................................25
6.3.2 Environment...............................................................................................................................26
6.3.3 Characteristics............................................................................................................................26
6.3.4 Other ..........................................................................................................................................27
7. OUTLINE DRAWINGS.........................................................................................................................28
7.1 FRONT VIEW....................................................................................................................................28
7.2 REAR VIEW ......................................................................................................................................29
DATA SHEET DOD-PP-0251 (6th edition)
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NL6448BC20-18D
1. OUTLINE
1.1 STRUCTURE AND PRINCIPLE
Color LCD module NL6448BC20-18D 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
•
•
•
•
•
•
•
•
•
•
High luminance
High contrast
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)
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NL6448BC20-18D
2. GENERAL SPECIFICATIONS
Display area
132.48 (H) × 99.36 (V) mm
Diagonal size of display
17cm (6.5inches)
Drive system
a-Si TFT active matrix
Display color
262,144 colors
Pixel
640 (H) × 480 (V) pixels
Pixel arrangement
RGB (Red dot, Green dot, Blue dot) vertical stripe
Dot pitch
0.0690 (H) × 0.2070 (V) mm
Pixel pitch
0.2070 (H) × 0.2070 (V) mm
Module size
153.0 (W) × 118.0 (H) × 10.5 (D) mm (typ.)
Weight
205g (typ.)
Contrast ratio
600:1 (typ.)
Viewing angle
Designed viewing direction
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)
Polarizer surface
Antiglare
Polarizer pencil-hardness
2H (min.) [by JIS K5400]
Color gamut
Response time
Luminance
Signal system
Power supply voltage
At LCD panel center
40% (typ.) [against NTSC color space]
Ton+Toff (10% ←→ 90%)
25ms (typ.)
At IBL= 5.0mArms / lamp
400cd/m2 (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
Backlight
Replaceable part
• Lamp holder set: Type No. 65LHS10
Recommended inverter (Option)
• Inverter: Type No. 65PW061
Power consumption
At IBL= 5.0mArms / lamp, Checkered flag pattern
4.4W (typ., Power dissipation of the inverter is not included.)
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NL6448BC20-18D
3. BLOCK DIAGRAM
Host
LCD module (Product)
100Ω
H-driver
R0 to R5
100Ω
G0 to G5
100Ω
B0 to B5
CLK
100Ω
Hsync
Controller
100Ω
1,920 lines
100Ω
LCD panel
V-driver
100Ω
DE
47kΩ
480 lines
Vsync
H: 640 × 3 (R, G, B)
V: 480
47kΩ
DPS
Power supply
for gradation
GND
Note1
Note2
VCC
Fuse
FG
Note1
Note2
DC/DC
converter
LCD panel signal processing board
Backlight (Edge light type)
VBLH
VDDB
GNDB
Note2
Inverter
(Option)
VBLH
Lamp
Lamp
VBLC
Note1
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.
DATA SHEET DOD-PP-0251 (6th edition)
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NL6448BC20-18D
4. DETAILED SPECIFICATIONS
4.1 MECHANICAL SPECIFICATIONS
Parameter
Specification
Unit
153.0 ± 0.5 (W) × 118.0 ± 0.5 (H) × 10.5 ± 0.5 (D)
Module size
Display area
132.48 (H) × 99.36 (V)
Weight
205 (typ.), 215 (max.)
Note1
mm
Note1
mm
g
Note1: See "7. OUTLINE DRAWINGS".
4.2 ABSOLUTE MAXIMUM RATINGS
Parameter
Power supply
voltage
Input voltage
for signals
Symbol
Rating
Unit
LCD panel signal processing board
VCC
-0.3 to +6.5
V
Lamp voltage
VBLH
1,700
Vrms
Display signals
Note1
Function signal
Note2
Ta= 25°C
VD
-0.3 to VCC+0.3
V
Tst
-20 to +80
°C
-
Front surface
TopF
-10 to +70
°C
Note3
Rear surface
TopR
-10 to +70
°C
Note4
≤ 95
%
Ta≤ 40°C
≤ 85
%
40 <Ta≤ 50°C
≤ 70
Note6
g/m3
Ta> 50°C
Storage temperature
VF
Operating temperature
Note1:
Note2:
Note3:
Note4:
Note5:
Note6:
Remarks
Relative humidity
Note5
RH
Absolute humidity
Note5
AH
CLK, Hsync, Vsync, DE, DATA (R0 to R5, G0 to G5, B0 to B5)
DPS
Measured at center of LCD panel surface (including self-heat)
Measured at center of LCD module's rear shield surface (including self-heat)
No condensation
Water amount at Ta= 50°C and RH= 85%
DATA SHEET DOD-PP-0251 (6th edition)
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NL6448BC20-18D
4.3 ELECTRICAL CHARACTERISTICS
4.3.1 LCD panel signal processing board
(Ta= 25°C)
Parameter
Symbol
Power supply voltage
VCC
min.
typ.
max.
Unit
Remarks
3.0
3.3
3.6
V
at VCC= 3.3V
4.75
5.0
5.25
V
at VCC= 5.0V
210
Note1
165
Note1
330
Note2
255
Note2
mA
at VCC= 3.3V
mA
at VCC= 5.0V
Power supply current
ICC
-
Logic input voltage for
display signals
High
VDH
0.7VCC
-
VCC
V
Low
VDL
0
-
0.3VCC
V
High
VFH
0.7VCC
-
VCC
V
Low
VFL
0
-
0.3VCC
V
CMOS level
Input voltage for DPS
signal
Note1: Checkered flag pattern [by EIAJ ED-2522]
Note2: Pattern for maximum current
DATA SHEET DOD-PP-0251 (6th edition)
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NL6448BC20-18D
4.3.2 Backlight lamp
(Ta= 25°C, Note1)
Parameter
Lamp current
Note3, Note4
Lamp voltage
Note2, Note3
Symbol
min.
typ.
max.
Unit
Remarks
IBL
2.0
5.0
5.5
mArms
at IBL=5.0mArms:
L= 400cd/m2
VBLH
-
360
-
Vrms
-
870
-
-
Vrms
Ta= 25°C
960
-
-
Vrms
Ta= -10°C
50
55
60
kHz
-
Lamp starting voltage
Note2, Note3, Note5, Note8
VS
Lamp oscillation frequency
Note6
FO
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
Sa
0
Sb
Pb
|Pa - Pb|
Pb
× 100 ≤ 5%
|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: This product consists of 2 lamps. 2 lamps are contained in the 1 lamp holder, and both lamps
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.
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
1
× (2n-1)
×
th
4
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 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.
DATA SHEET DOD-PP-0251 (6th edition)
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NL6448BC20-18D
Note8: In case of Inverter with Ballast condenser, "VS" is the voltage level between Ballast
condenser and Connector (Refer to the below “Example of measurement”). "VS" should be
designed to be more than minimum "VS". Otherwise the lamp may not be turned on because
the lamp starting voltage is less than minimum "VS".
Example of measurement
Probe capacity: 3pF (Tektronix, inc.: P6015A)
Ballast condenser
(Lamp side)
High voltage probe
Connector
Transformer
Probe capacity
Inverter
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.
Ripple voltage
Note1
(Measure at input terminal of power supply)
Unit
3.3V
≤ 100
mVp-p
5.0V
≤ 100
mVp-p
Power supply voltage
VCC
Note1: The permissible ripple voltage includes spike noise.
4.3.4 Fuse
Fuse
Parameter
Rating
Type
VCC
Fusing current
Remarks
4.0A
Note1
Supplier
FCC16202AB
KAMAYA
ELECTRIC Co., Ltd
2.0A
32V
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.
DATA SHEET DOD-PP-0251 (6th edition)
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NL6448BC20-18D
4.4 POWER SUPPLY VOLTAGE SEQUENCE
4.4.1 LCD panel signal processing board
ON
VCC
Note1
ON
OFF
3.0V or 4.75V
0V
Display signals
Function signal
Note2
Toff > 50ms
Tr < 30ms
0V
VALID period
0ms < t < 35ms
0ms < t < 35ms
Note1: In terms of voltage variation (voltage drop) while VCC rising edge is below 3.0V in "VCC =
3.3V" or 4.75V in "VCC = 5.0V", a protection circuit may work, and then this product may
not work.
Note2: Display signals (CLK, Hsync, Vsync, DE, DATA (R0 to R5, G0 to G5, B0 to B5)) and
function signal (DPS) must be Low or High-impedance, exclude the VALID period (See
above sequence diagram), in order to avoid that internal circuits is damaged.
If some of display and function signals of this product are cut while this product is working,
even if the signal input to it once again, it might not work normally. VCC should be cut when
the display and function signals are stopped.
4.4.2 Inverter (Option)
Note2
Display signals
Function signals
Note1
VALID period
VDDB
Note1: These are the display and function signals for LCD panel signal processing board.
Note2: The backlight should be turned on within the valid period of display and function signals, in
order to avoid unstable data display.
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NL6448BC20-18D
4.5 CONNECTIONS AND FUNCTIONS FOR INTERFACE PINS
4.5.1 LCD panel signal processing board
CN1 socket (LCD module side): DF9B-31P-1V (3∗) (Hirose Electric Co., Ltd. (HRS))
Adaptable plug:
DF9-31S-1V (2∗), DF9-31S-1V (3∗) (Hirose Electric Co., Ltd. (HRS))
Pin No.
Symbol
Signal
Remarks
1
GND
Ground
2
CLK
Dot clock
Note1
3
Hsync
Horizontal synchronous signal
4
Vsync
Vertical synchronous signal
5
GND
Ground
Note1
6
R0
Red data (LSB)
Least significant bit
7
R1
Red data
8
R2
Red data
9
R3
Red data
10
R4
Red data
11
R5
Red data (MSB)
Most significant bit
12
GND
Ground
Note1
13
G0
Green data (LSB)
Least significant bit
14
G1
Green data
15
G2
Green data
16
G3
Green data
17
G4
Green data
18
G5
Green data (MSB)
Most significant bit
19
GND
Ground
Note1
20
B0
Blue data (LSB)
Least significant bit
21
B1
Blue data
22
B2
Blue data
23
B3
Blue data
-
-
-
-
24
B4
Blue data
25
B5
Blue data (MSB)
Most significant bit
26
GND
Ground
27
DE
Selection of DE / Fixed mode
Note1
High or Open:
Fixed mode
Data enable signal: DE mode
28
VCC
Power supply
29
VCC
Power supply
30
N.C.
31
DPS
Note1
-
Selection of scan direction
Keep this pin Open.
High:
Reverse scan
Low or Open: Normal scan
Note2
Note1: All GND and VCC terminals should be used without any non-connected lines.
Note2: See "4.8 SCANNING DIRECTIONS".
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NL6448BC20-18D
4.5.2 Backlight lamp
Attention: VBLH and VBLC must be connected correctly. Wrong connections will cause
electric shock and also break down of the product.
CN2 plug (LCD module side):
Adaptable socket:
BHR-04VS-1 (J.S.T Mfg. Co., Ltd.)
SM03 (7-D1) B-BHS-1-TB (LF)(SN),
SM03 (7-D1) B-BHS-1-TB
(J.S.T Mfg. Co., Ltd.)
Pin No.
Symbol
Signal
Remarks
1
VBLH
High voltage (Hot)
Cable color: Pink
2
VBLH
High voltage (Hot)
Cable color: Pink
3
N. C.
-
Keep this pin Open.
4
VBLC
Low voltage (Cold)
Cable color: Black
4.5.3 Positions of plugs and a socket
Low voltage (Cold)
Rear side
4
CN2
2
1
High voltage
caution marking
High voltage (Hot)
Disposal method
marking for lamp
Barcode label
Name plate
1
3
2
30
31
CN1
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4.6 DISPLAY COLORS AND INPUT DATA SIGNALS
This product can display in equivalent to 262,144 colors in 64 gray scales. Also the relation between
display colors and input data signals is as the following table.
Basic colors
Display colors
Black
Blue
Red
Magenta
Green
Cyan
Yellow
White
Red gray scale
Black
dark
↑
↓
bright
Red
Green gray scale
Black
dark
↑
↓
bright
Green
Blue gray scale
Black
dark
↑
↓
bright
Blue
R5
0
0
1
1
0
0
1
1
0
0
0
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
Data signal (0: Low level, 1: High level)
R4 R3 R2 R1 R0 G5 G4 G3 G2 G1 G0 B5
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
1
1
1
1
1 0
0
0
0
0
0 1
1
1
1
1
1 0
1
1
1
1
1 0
0
0
0
0
0 1
1
1
1
1
1 1
0
0
0
0
0 1
1
1
1
1
1 0
1
1
1
1
1 1
1
1
1
1
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
1 0
0
0
0
0
0 0
0
0
0
1
0 0
:
:
:
:
0
0
0
0
0 0
1
1
1
0
1 0
0
0
0
0
0 0
1
1
1
1
0 0
0
0
0
0
0 0
1
1
1
1
1 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
1
0 0
0
0
0
0
0 0
:
:
:
:
1
1
1
0
1 0
0
0
0
0
0 1
1
1
1
1
0 0
0
0
0
0
0 1
1
1
1
1
1 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
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 1
0
0
0
0
0 0
0
0
0
0
0 1
0
0
0
0
0 0
DATA SHEET DOD-PP-0251 (6th edition)
B4 B3 B2 B1 B0
0
0
0
0
0
1
1
1
1
1
0
0
0
0
0
1
1
1
1
1
0
0
0
0
0
1
1
1
1
1
0
0
0
0
0
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
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
1
0
:
:
1
1
1
0
1
1
1
1
1
0
1
1
1
1
1
14
NL6448BC20-18D
4.7 DISPLAY POSITIONS
The following table is the coordinates per pixel (See "4.8 SCANNING DIRECTIONS".).
C (0, 0)
R
G
B
C(
0,
0)
C(
1,
0)
∙
∙
∙
C(
X,
0)
∙
∙
∙
C(638,
0)
C(639,
0)
C(
0,
1)
C(
1,
1)
∙
∙
∙
C(
X,
1)
∙
∙
∙
C(638,
1)
C(639,
1)
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
∙
C(
0,
Y)
C(
∙
∙
∙
1,
Y)
∙
∙
∙
C(
X,
Y)
∙
∙
∙
C(638,
∙
Y)
∙
∙
∙
C(639,
∙
Y)
∙
∙
∙
∙
∙
∙
C(
0, 478)
C(
1, 478)
∙
∙
∙
C(
X, 478)
∙
∙
∙
C(638, 478)
C(639, 478)
C(
0, 479)
C(
1, 479)
∙
∙
∙
C(
X, 479)
∙
∙
∙
C(638, 479)
C(639, 479)
4.8 SCANNING DIRECTIONS
The following figures are seen from a front view. Also the arrow shows the direction of scan.
C (0, 0)
D (0, 0)
C (639, 0)
D (639, 0)
Note1
C (0, 479)
D (0, 479)
C (639, 479)
D (639, 479)
Figure1. Normal scan (DPS: Low or Open)
C (0, 0)
D (639, 479)
C (639, 0)
D (0, 479)
Note1
C (0, 479)
D (639, 0)
C (639, 479)
D (0, 0)
Figure2. Reverse scan (DPS: High)
Note1: Meaning of C (X, Y) and D (X, Y)
C (X, Y): The coordinates of the display position (See "4.7 DISPLAY POSITIONS".)
D (X, Y): The data number of input signal for LCD panel signal processing board
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NL6448BC20-18D
4.9 INPUT SIGNAL TIMINGS
4.9.1 Outline of input signal timings
• Horizontal signal
Note1
Horizontal synchronizing cycle (th)
Horizontal synchronizing pulse width (thp)
Hsync
Note2
Horizontal back-porch (thb)
Horizontal front-porch (thf)
Display period
Horizontal display period (thd)
DE (Data enable)
• Vertical signal
Note1
Vertical synchronizing cycle (tv)
Vertical synchronizing pulse width (tvp)
Vsync
Note2
Vertical back-porch (tvb)
Vertical front-porch (tvf)
Display period
Vertical display period (tvd)
DE (Data enable)
1
2
3
4
480
Note3
Note1: This diagram indicates virtual signal for set up to timing.
Note2: Fixed mode cannot be used while working of DE mode.
Note3: See "4.9.3 Input signal timing chart" for numeration of pulse.
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NL6448BC20-18D
4.9.2 Timing characteristics
(a) Fixed mode
(Note1)
Parameter
Symbol
min.
typ.
max.
Unit
Remarks
Frequency
1/tc
21.0
25.175
29.0
MHz
39.72ns (typ.)
Duty
tcd
0.4
0.5
0.6
-
Rise time, Fall time
tcrf
-
-
10
ns
Setup time
tds
3
-
-
ns
Hold time
tdh
5
-
-
ns
Rise time, Fall time
tdrf
-
-
10
ns
30.0
31.778
33.6
μs
Cycle
th
CLK
DATA
(R0-R5)
(G0-G5)
(B0-B5)
CLK-DATA
800
CLK
Display period
thd
640
CLK
Front-porch
thf
16
CLK
Pulse width
thp
10
96
-
CLK
Back-porch
thb
-
48
134
CLK
Total of pulse width and back-porch
thp + thb
-
31.468kHz (typ.)
-
Hsync
144
CLK
Setup time
ths
3
-
-
ns
Hold time
thh
5
-
-
ns
Rise time, Fall time
thrf
-
-
10
ns
16.1
16.683
17.2
ms
Cycle
tv
Note2
CLK- Hsync
Vsync
525
H
Display period
tvd
480
H
Front-porch
tvf
12
H
Pulse width
tvp
1
2
-
H
Back-porch
tvb
-
31
32
H
Total of pulse width and
back-porch
tvp + tvb
33
H
Setup time
tvhs
3
-
-
ns
Hold time
tvhh
5
-
-
ns
tvrf
-
-
10
ns
-
59.94Hz (typ.)
-
Note2
Hsync-Vsync
Rise time, Fall time
-
Note1: Definition of parameters is as follows.
tc= 1CLK, tcd= tch/tc, th= 1H
Note2: Keep tvp + tvb and thp + thb within the table. If it is out of specification, display position will
be shifted to right/left side or up/down.
DATA SHEET DOD-PP-0251 (6th edition)
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NL6448BC20-18D
(b) DE mode
(Note1, Note2, Note3)
Parameter
Symbol
min.
typ.
max.
Unit
Remarks
Frequency
1/tc
21.0
25.175
29.0
MHz
39.72ns (typ.)
Duty
tcd
0.4
0.5
0.6
-
Rise time, Fall time
tcrf
-
-
10
ns
Setup time
tds
3
-
-
ns
Hold time
tdh
5
-
-
ns
tdrf
-
-
10
ns
30.0
31.778
33.6
μs
-
800
-
CLK
CLK
-
DATA
(R0-R5)
(G0-G5)
(B0-B5)
CLK-DATA
Rise time, Fall time
Cycle
-
31.468kHz (typ.)
th
Horizontal
-
DE
Vertical
(One frame)
Display period
thd
Cycle
tv
640
CLK
16.1
16.683
17.2
ms
-
525
-
H
Display period
tvd
480
Setup time
tdes
3
-
-
ns
Hold time
tdeh
5
-
-
ns
tderf
-
-
10
ns
59.94Hz (typ.)
H
-
CLK-DE
Rise time, Fall time
Note1: Definition of parameters is as follows.
tc= 1CLK, tcd= tch/tc, th= 1H
Note2: Hsync signal (CN1-Pin No.3) and Vsync signal (CN1-Pin No.4) are not used inside the
product at DE mode, but do not keep pin open to avoid noise problem.
Note3: Vertical cycle (tv) should be specified in integral multiple of Horizontal cycle (th).
DATA SHEET DOD-PP-0251 (6th edition)
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NL6448BC20-18D
4.9.3 Input signal timing chart
(a) Fixed mode
Vsync
1H
tvp
tvb
tvd
33H (fixed)
tvf
480H (fixed)
12H (fixed)
Hsync
1 2
3
1
Hsync
DATA
(R0-R5)
(G0-G5)
(B0-B5)
D(X,0)
INVALID
D(X,478)D(X,479)
D(X,Y)
INVALID
(Note: X=0 to 639)
Hsync
DATA
(R0-R5)
(G0-G5)
(B0-B5)
D(0,Y)D(1,Y)
INVALID
D(X,Y)
D(638,Y)D(639,Y)
INVALID
1CLK
Hsync
thp
thb
thf
thd
640CLK (fixed)
144CLK (fixed)
16CLK (fixed)
CLK
1
2
1
DATA
(R0-R5)
(G0-G5)
(B0-B5)
INVALID
D(0,Y)D(1,Y)
D(639,Y)
INVALID
(Note: Y=0 to 479)
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NL6448BC20-18D
(b) DE mode
Horizontal timing
tc
CLK
DATA
(R0-R5)
(G0-G5)
(B0-B5)
INVALID
1
2
639 640
INVALID
DE
thd
th
Vertical timing
DATA
(R0-R5)
(G0-G5)
(B0-B5)
INVALID
INVALID
1 2
479 480
DE
tvd
tv
DATA SHEET DOD-PP-0251 (6th edition)
20
NL6448BC20-18D
(c) Common item of Fixed mode and DE mode
tc
tch
CLK
0.7VCC
0.3VCC
tcrf
tcrf
tds
DATA
(R0-R5)
(G0-G5)
(B0-B5)
tdh
INVALID
INVALID
0.7VCC
0.3VCC
tdrf
tdrf
tdeh
tdes
DE
0.7VCC
0.3VCC
tderf
CLK
tderf
0.7VCC
0.3VCC
ths
Hsync
0.7VCC
0.3VCC
thrf
Hsync
thrf
0.7VCC
0.3VCC
tvhs
Vsync
thh
tvhh
0.7VCC
0.3VCC
tvrf
tvrf
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NL6448BC20-18D
4.10 OPTICS
4.10.1 Optical characteristics
(Note1, Note2)
Parameter
Condition
Luminance
Contrast ratio
Luminance uniformity
White
min.
typ.
max.
Unit Remarks
L
280
400
-
cd/m2
-
CR
300
600
-
-
Note3
Note4
White at center
θR= 0°, θL= 0°, θU= 0°, θD= 0°
White/Black at center
θR= 0°, θL= 0°, θU= 0°, θD= 0°
White
θR= 0°, θL= 0°, θU= 0°, θD= 0°
x coordinate
LU
-
1.25
1.4
-
Wx
0.283
0.313
0.343
-
Red
Chromaticity
Green
Blue
y coordinate
Wy
0.299
0.329
0.359
-
x coordinate
Rx
-
0.582
-
-
y coordinate
Ry
-
0.344
-
-
x coordinate
Gx
-
0.328
-
-
y coordinate
Gy
-
0.528
-
-
x coordinate
Bx
-
0.156
-
-
y coordinate
By
-
0.146
-
-
θR= 0°, θL= 0°, θU= 0°, θD= 0°
at center, against NTSC color space
White to Black
C
35
40
-
%
Ton
-
6
15
ms
Black to White
Toff
-
19
47
ms
Right
θU= 0°, θD= 0°, CR≥ 10
θR
70
80
-
°
Left
θU= 0°, θD= 0°, CR≥ 10
θL
70
80
-
°
Up
θR= 0°, θL= 0°, CR≥ 10
θU
70
80
-
°
Down
θR= 0°, θL= 0°, CR≥ 10
θD
50
60
-
°
Color gamut
Response time
Viewing angle
Symbol
Note5
Note6
Note7
Note8
Note1: These are initial characteristics.
Note2: Measurement conditions are as follows.
Ta= 25°C, VCC= 3.3V, IBL= 5.0mArms/lamp, Display mode: VGA, Horizontal cycle=
1/31.468kHz, Vertical cycle= 1/59.94Hz, DPS= Low or Open: Normal scan
Optical characteristics are measured at luminance saturation after 20minutes from working
the product, in the dark room. Also measurement methods are as follows.
50cm
Photodetector (BM-5A)
LCD module
(Product)
Note3:
Note4:
Note5:
Note6:
Note7:
Note8:
1°
See "4.10.2 Definition of contrast ratio".
See "4.10.3 Definition of luminance uniformity".
These coordinates are found on CIE 1931 chromaticity diagram.
Product surface temperature: TopF= 32°C
See "4.10.4 Definition of response times".
See "4.10.5 Definition of viewing angles".
DATA SHEET DOD-PP-0251 (6th edition)
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NL6448BC20-18D
4.10.2 Definition of contrast ratio
The contrast ratio is calculated by using the following formula.
Luminance of white screen
Luminance of black screen
Contrast ratio (CR) =
4.10.3 Definition of luminance uniformity
The luminance uniformity is calculated by using following formula.
Luminance uniformity (LU) =
Maximum luminance from ① to ⑤
Minimum luminance from ① to ⑤
The luminance is measured at near the 5 points shown below.
106
320
533
②
①
80
③
240
⑤
④
400
4.10.4 Definition of response times
Response time is measured, the luminance changes from "white" to "black", or "black" to "white"
on the same screen point, by photo-detector. Ton is the time it takes the luminance change from
90% down to 10%. Also Toff is the time it takes the luminance change from 10% up to 90% (See
the following diagram.).
White
100%
90%
Luminance
Black
10%
0%
Toff
Ton
4.10.5 Definition of viewing angles
Normal axis (Perpendicular)
12 o’clock
θL
Upper
θU
Left
θR
θD
Lower
Right
DATA SHEET DOD-PP-0251 (6th edition)
23
NL6448BC20-18D
5. RELIABILITY TESTS
Test item
Condition
High temperature and humidity
(Operation)
Judgment
① 60 ± 2°C, RH= 90%, 240hours
② Display data is black.
① 70 ± 3°C, 240hours
② Display data is black.
High temperature
(Operation)
① -10 ± 3°C…1hour
70 ± 3°C…1hour
② 50cycles, 4 hours/cycle
③ Display data is black.
Heat cycle
(Operation)
① -20 ± 3°C…30minutes
80 ± 3°C…30minutes
② 100cycles, 1hour/cycle
③ Temperature transition time is within 5
minutes.
Thermal shock
(Non operation)
ESD
(Operation)
① 150pF, 150Ω, ±10kV
② 9 places on a panel surface
Note2
③ 10 times each places at 1 sec interval
Dust
(Operation)
① Sample dust: No. 15 (by JIS-Z8901))
② 15 seconds stir
③ 8 times repeat at 1 hour interval
①
②
③
④
Vibration
(Non operation)
5 to 100Hz, 19.6m/s2
1 minute/cycle
X, Y, Z direction
120 times each directions
① 539m/ s2, 11ms
② ±X, ±Y, ±Z direction
③ 5 times each directions
Mechanical shock
(Non operation)
No display malfunctions
Note1
No display malfunctions
No physical damages
Note1
Note1: Display and appearance are checked under environmental conditions equivalent to the
inspection conditions of defect criteria.
Note2: See the following figure for discharge points.
{
{
{
{
{
{
{
{
{
DATA SHEET DOD-PP-0251 (6th edition)
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NL6448BC20-18D
6. PRECAUTIONS
6.1 MEANING OF CAUTION SIGNS
The following caution signs have very important meaning. Be sure to read "6.2 CAUTIONS" and
"6.3 ATTENTIONS", after understanding these contents!
!
This sign has the meaning that customer will be injured by himself or the product will
sustain a damage, if customer has wrong operations.
This sign has the meaning that customer will get an electrical shock, if customer has
wrong operations.
This sign has the meaning that customer will be injured by himself, if customer has
wrong operations.
6.2 CAUTIONS
∗ Do not touch the working backlight. There is a danger of an electric shock.
∗ Do not touch the working backlight. There is a danger of burn injury.
∗ Do not shock and press the LCD panel and the backlight! There is a danger of breaking,
because they are made of glass. (Shock: To be not greater 539m/s2 and to be not greater
11ms, Pressure: To be not greater 19.6N (φ16mm jig))
6.3 ATTENTIONS
!
6.3.1 Handling of the product
① Take hold of both ends without touching the circuit board when the product (LCD module) is
picked up from inner packing box to avoid broken down or misadjustment, because of stress to
mounting parts on the circuit board.
② Do not hook nor pull cables such as lamp cable, and so on, in order to avoid any damage.
③ When the product is put on the table temporarily, display surface must be placed downward.
④ When handling the product, take the measures of electrostatic discharge with such as earth band,
ionic shower and so on, because the product may be damaged by electrostatic.
⑤ The torque for product mounting screws must never exceed 0.147N⋅m. Higher torque might result
in distortion of the bezel. And the length of product mounting screws must be ≤ 2.0mm.
⑥ The product must be installed using mounting holes without undue stress such as bends or twist
(See outline drawings). And do not add undue stress to any portion (such as bezel flat area). Bends
or twist described above and undue stress to any portion may cause display mura.
⑦ Do not press or rub on the sensitive product surface. When cleaning the product surface, use of the
cloth with ethanolic liquid such as screen cleaner for LCD is recommended.
DATA SHEET DOD-PP-0251 (6th edition)
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NL6448BC20-18D
⑧ Do not push nor pull the interface connectors while the product is working.
⑨ Do not bend or unbend the lamp cable at the near part of the lamp holding rubber, to avoid the
damage for high voltage side of the lamp.
⑩ Properly connect the plug (backlight side) to adaptable socket (inverter side) without incomplete
connection. After connecting, be careful not to hook the lamp cables because incomplete
connection may occur by hooking the lamp cables. This incomplete connection may cause
abnormal operation of high voltage circuit.
⑪ If the lamp cable is attached on the metal part of the product directly, high frequency leak current
to the metal part may occur, then the brightness may decrease or the lamp may not be turned on.
⑫ When handling the product, use of an original protection sheet on the product surface (polarizer) is
recommended for protection of product surface. Adhesive type protection sheet may change color
or characteristics of the polarizer.
⑬ Usually liquid crystals don't leak through the breakage of glasses because of the surface tension of
thin layer and the construction of LCD panel. But, if you contact with liquid crystal for the worst,
please wash it out with soap.
6.3.2 Environment
① Do not operate or store in high temperature, high humidity, dewdrop atmosphere or corrosive
gases. Keep the product in packing box with antistatic pouch in room temperature to avoid dusts
and sunlight, when storing the product.
② In order to prevent dew condensation occurring by temperature difference, the product packing
box should be opened after enough time being left under the environment of an unpacking room.
Evaluate the leaving time sufficiently because a situation of dew condensation occurring is
changed by the environmental temperature and humidity. (Recommended leaving time: 6 hours or
more with packing state)
③ Do not operate in high magnetic field. Circuit boards may be broken down by it.
④ This product is not designed as radiation hardened.
6.3.3 Characteristics
The following items are neither defects nor failures.
① Response time, luminance and color may be changed by ambient temperature.
② Display mura, flicker, vertical seam or small spot may be observed depending on display patterns.
③ Optical characteristics (e.g. luminance, display uniformity, etc.) gradually is going to change
depending on operating time, and especially low temperature, because the LCD has cold cathode
fluorescent lamps.
④ Do not display the fixed pattern for a long time because it may cause image sticking. Use a screen
saver, if the fixed pattern is displayed on the screen.
⑤ The display color may be changed depending on viewing angle because of the use of condenser
sheet in the backlight.
⑥ Optical characteristics may be changed depending on input signal timings.
⑦ The interference noise between input signal frequency for this product's signal processing board
and luminance control frequency of the inverter may appear on a display. Set up luminance
control frequency of the inverter so that the interference noise does not appear.
⑧ After the product is stored under condition of low temperature or dark place for a long time, the
cold cathode fluorescent lamp may not be turned on under the same condition because of the
general characteristic of cold cathode fluorescent lamp. In addition, when Luminance control ratio
is low in pulse width modulation method inverter, the lamp may not be turned on. In this case,
power should be supplied again.
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NL6448BC20-18D
6.3.4 Other
①
②
③
④
⑤
All GND and VCC terminals should be used without any non-connected lines.
Do not disassemble a product or adjust variable resistors.
See "REPLACEMENT MANUAL FOR LAMP HOLDER SET", when replacing backlight lamps.
Pay attention not to insert foreign materials inside of the product, when using tapping screws.
Pack the product with original shipping package, in order to avoid any damages during
transportation, when returning the product to NEC for repair and so on.
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NL6448BC20-18D
7. OUTLINE DRAWINGS
7.1 FRONT VIEW
Unit: mm
Note1: The values in parentheses are for reference.
Note2: The torque for product mounting screws must never exceed 0.147N⋅m. And the length of mounting screws must be ≤ 2.0mm.
DATA SHEET DOD-PP-0251 (6th edition)
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NL6448BC20-18D
7.2 REAR VIEW
Note1: The values in parentheses are for reference.
Note2: The torque for product mounting screws must never exceed 0.147N⋅m. And the length of mounting screws must be ≤ 2.0mm.
DATA SHEET DOD-PP-0251 (6th edition)
Unit: mm
29