NL6448BC20-18D [NEC]
TFT COLOR LCD MODULE; TFT彩色液晶模块
| 型号： | NL6448BC20-18D |
| 厂家： | 
NEC |
| 描述： | TFT COLOR LCD MODULE |
| 文件： | 总29页 (文件大小：354K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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)
DATA SHEET DOD-PP-0251 (6th edition)
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NL6448BC20-18D
2. GENERAL SPECIFICATIONS
Display area
Diagonal size of display
Drive system
Display color
Pixel
132.48 (H) × 99.36 (V) mm
17cm (6.5inches)
a-Si TFT active matrix
262,144 colors
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) × 10.5 (D) mm (typ.)
205g (typ.)
Pixel arrangement
Dot pitch
Pixel pitch
Module size
Weight
Contrast ratio
600:1 (typ.)
At the contrast ratio ≥10:1
Viewing angle
• 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
Designed viewing direction
(perpendicular)
Polarizer surface
Antiglare
Polarizer pencil-hardness
2H (min.) [by JIS K5400]
At LCD panel center
40% (typ.) [against NTSC color space]
Color gamut
Response time
Luminance
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)
Signal system
Power supply voltage
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. 65LHS10
Backlight
Recommended inverter (Option)
• Inverter: Type No. 65PW061
At IBL= 5.0mArms / lamp, Checkered flag pattern
4.4W (typ., Power dissipation of the inverter is not included.)
Power consumption
DATA SHEET DOD-PP-0251 (6th edition)
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NL6448BC20-18D
3. BLOCK DIAGRAM
Host
LCD module (Product)
100Ω
H-driver
R0 to R5
G0 to G5
100Ω
100Ω
B0 to B5
100Ω
100Ω
100Ω
100Ω
CLK
Hsync
Vsync
1,920 lines
LCD panel
H: 640 × 3 (R, G, B)
V: 480
DE
47kΩ
DPS
Power supply
for gradation
GND
Note1
Note2
DC/DC
converter
VCC
Fuse
LCD panel signal processing board
FG
Note1
Note2
Backlight (Edge light type)
VBLH
Lamp
Lamp
Inverter
VDDB
VBLH
(Option)
GNDB
Note2
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
FG - VBLC
Not connected
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
Module size
Display area
Weight
Specification
153.0 ± 0.5 (W) × 118.0 ± 0.5 (H) × 10.5 ± 0.5 (D)
132.48 (H) × 99.36 (V)
Unit
Note1
Note1
mm
mm
g
205 (typ.), 215 (max.)
Note1: See "7. OUTLINE DRAWINGS".
4.2 ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
VCC
VBLH
VD
Rating
-0.3 to +6.5
1,700
Unit
V
Remarks
LCD panel signal processing board
Power supply
voltage
Lamp voltage
Vrms
Ta= 25°C
Display signals
Input voltage
for signals
Note1
Function signal
Note2
-0.3 to VCC+0.3
V
VF
Storage temperature
Tst
-20 to +80
-10 to +70
-10 to +70
≤ 95
-
°C
°C
Front surface
Rear surface
TopF
TopR
Note3
Operating temperature
Note4
°C
%
Ta≤ 40°C
40 <Ta≤ 50°C
Ta> 50°C
Relative humidity
Note5
RH
%
≤ 85
Absolute humidity
Note5
≤ 70
Note6
AH
g/m3
Note1: CLK, Hsync, Vsync, DE, DATA (R0 to R5, G0 to G5, B0 to B5)
Note2: DPS
Note3: Measured at center of LCD panel surface (including self-heat)
Note4: Measured at center of LCD module's rear shield surface (including self-heat)
Note5: No condensation
Note6: 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
min.
typ.
3.3
5.0
max.
3.6
Unit
V
Remarks
3.0
at VCC= 3.3V
at VCC= 5.0V
at VCC= 3.3V
at VCC= 5.0V
Power supply voltage
VCC
ICC
4.75
5.25
V
210
Note1
330
Note2
-
mA
mA
V
Power supply current
165
Note1
255
Note2
-
High
Low
High
Low
VDH
VDL
VFH
VFL
0.7VCC
-
-
-
-
VCC
0.3VCC
VCC
Logic input voltage for
display signals
0
0.7VCC
0
V
CMOS level
V
Input voltage for DPS
signal
0.3VCC
V
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
Symbol
IBL
min.
2.0
typ.
5.0
max.
5.5
Unit
Remarks
Lamp current
at IBL=5.0mArms:
L= 400cd/m2
mArms
Note3, Note4
Note2, Note3
Lamp voltage
VBLH
VS
-
360
-
-
-
Vrms
Vrms
Vrms
kHz
-
870
960
50
Ta= 25°C
Ta= -10°C
-
Lamp starting voltage
Note2, Note3, Note5, Note8
-
-
Lamp oscillation frequency
Note6
FO
55
60
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
|Pa - Pb|
Sa
× 100 ≤ 5%
× 100 ≤ 5%
Pb
0
Sb
|Sa - Sb|
Sb
Pb
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
1
th
1
4
(2n-1)
×
×
=
FO
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
(Measure at input terminal of power supply)
Note1
Power supply voltage
Unit
3.3V
5.0V
mVp-p
mVp-p
≤ 100
VCC
≤ 100
Note1: The permissible ripple voltage includes spike noise.
4.3.4 Fuse
Fuse
Parameter
VCC
Rating
Fusing current
4.0A
Remarks
Note1
Type
Supplier
2.0A
32V
KAMAYA
ELECTRIC Co., Ltd
FCC16202AB
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
OFF
ON
3.0V or 4.75V
0V
VCC
Note1
Toff > 50ms
Tr < 30ms
Display signals
Function signal
Note2
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.
DATA SHEET DOD-PP-0251 (6th edition)
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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
CLK
Hsync
Vsync
GND
R0
Ground
Note1
2
Dot clock
-
3
Horizontal synchronous signal
Vertical synchronous signal
Ground
4
5
Note1
6
Red data (LSB)
Red data
Least significant bit
7
R1
8
R2
Red data
-
9
R3
Red data
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
R4
Red data
R5
Red data (MSB)
Ground
Most significant bit
Note1
GND
G0
Green data (LSB)
Green data
Least significant bit
G1
G2
Green data
-
G3
Green data
G4
Green data
G5
Green data (MSB)
Ground
Most significant bit
Note1
GND
B0
Blue data (LSB)
Blue data
Least significant bit
B1
B2
Blue data
-
B3
Blue data
B4
Blue data
B5
Blue data (MSB)
Ground
Most significant bit
GND
Note1
High or Open:
Data enable signal: DE mode
Fixed mode
27
DE
Selection of DE / Fixed mode
28
29
30
VCC
VCC
N.C.
Power supply
Power supply
-
Note1
Keep this pin Open.
High:
Reverse scan
31
DPS
Selection of scan direction
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".
DATA SHEET DOD-PP-0251 (6th edition)
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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): BHR-04VS-1 (J.S.T Mfg. Co., Ltd.)
Adaptable socket:
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
VBLH
VBLH
N. C.
Signal
High voltage (Hot)
High voltage (Hot)
-
Remarks
1
2
3
4
Cable color: Pink
Cable color: Pink
Keep this pin Open.
Cable color: Black
VBLC
Low voltage (Cold)
4.5.3 Positions of plugs and a socket
Low voltage (Cold)
Rear side
4
CN2
High voltage
caution marking
2
1
High voltage (Hot)
Disposal method
marking for lamp
Barcode label
Name plate
1
3
2
30
31
CN1
DATA SHEET DOD-PP-0251 (6th edition)
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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.
Data signal (0: Low level, 1: High level)
Display colors
R5 R4 R3 R2 R1 R0 G5 G4 G3 G2 G1 G0 B5 B4 B3 B2 B1 B0
0
0
1
1
0
0
1
1
0
0
0
0
0
1
1
0
0
1
1
0
0
0
0
0
1
1
0
0
1
1
0
0
0
0
0
1
1
0
0
1
1
0
0
0
0
0
1
1
0
0
1
1
0
0
1
0
0
1
1
0
0
1
1
0
1
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
1
0
1
0
1
0
1
0
0
0
0
1
0
1
0
1
0
1
0
0
0
0
1
0
1
0
1
0
1
0
0
0
0
1
0
1
0
1
0
1
0
0
0
0
1
0
1
0
1
0
1
0
0
0
0
1
0
1
0
1
0
1
0
0
0
Black
Blue
Red
Magenta
Green
Cyan
Yellow
White
Black
dark
↑
↓
:
:
:
:
:
:
1
1
1
0
0
0
1
1
1
0
0
0
1
1
1
0
0
0
1
1
1
0
0
0
0
1
1
0
0
0
1
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
1
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
bright
Red
Black
dark
↑
↓
:
:
:
:
:
:
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
1
1
0
0
0
1
1
1
0
0
0
1
1
1
0
0
0
1
1
1
0
0
0
0
1
1
0
0
0
1
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
1
0
0
0
0
1
0
bright
Green
Black
dark
↑
↓
:
:
:
:
:
:
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
1
1
1
1
1
1
1
1
1
1
1
0
1
1
1
0
1
bright
Blue
DATA SHEET DOD-PP-0251 (6th edition)
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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( 0, 1)
C( 1, 0)
C( 1, 1)
∙
∙
∙
∙
∙
∙
∙
∙
∙
C( X, 0)
C( X, 1)
∙
∙
∙
∙
∙
∙
∙
∙
∙
C(638, 0)
C(638, 1)
C(639, 0)
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
DATA SHEET DOD-PP-0251 (6th edition)
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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 front-porch (thf)
Horizontal back-porch (thb)
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.
DATA SHEET DOD-PP-0251 (6th edition)
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NL6448BC20-18D
4.9.2 Timing characteristics
(a) Fixed mode
(Note1)
Parameter
Symbol
1/tc
tcd
min.
21.0
0.4
-
typ.
max.
29.0
0.6
10
Unit
MHz
-
Remarks
Frequency
25.175
39.72ns (typ.)
CLK
Duty
0.5
-
Rise time, Fall time
tcrf
-
ns
Setup time
Hold time
Rise time, Fall time
tds
3
-
-
-
ns
DATA
(R0-R5)
(G0-G5)
(B0-B5)
CLK-DATA
-
tdh
5
-
ns
tdrf
-
-
10
ns
30.0
31.778
800
640
16
33.6
31.468kHz (typ.)
μs
Cycle
th
CLK
CLK
CLK
CLK
CLK
CLK
ns
Display period
Front-porch
Pulse width
Back-porch
thd
thf
-
thp
thb
10
-
96
-
Hsync
48
134
Total of pulse width and back-porch thp + thb
144
-
Note2
Setup time
Hold time
ths
thh
thrf
3
5
-
-
CLK- Hsync
-
-
ns
Rise time, Fall time
-
-
10
17.2
ns
16.1
16.683
525
480
12
ms
H
59.94Hz (typ.)
Cycle
tv
Display period
Front-porch
Pulse width
Back-porch
tvd
tvf
H
-
H
tvp
tvb
1
-
2
-
H
Vsync
31
32
H
Total of pulse width and
back-porch
tvp + tvb
33
H
Note2
-
Setup time
tvhs
tvhh
tvrf
3
5
-
-
-
-
-
-
ns
ns
ns
Hsync-Vsync
Hold time
Rise time, Fall time
10
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
Frequency
Symbol
1/tc
tcd
min.
typ.
max.
29.0
0.6
10
-
Unit
MHz
-
Remarks
21.0
25.175
39.72ns (typ.)
CLK
Duty
0.4
0.5
-
Rise time, Fall time
tcrf
-
-
ns
Setup time
Hold time
tds
3
-
ns
DATA
(R0-R5)
(G0-G5)
(B0-B5)
CLK-DATA
Horizontal
-
tdh
5
-
-
ns
Rise time, Fall time
tdrf
-
30.0
-
-
31.778
800
640
16.683
525
480
-
10
33.6
-
ns
31.468kHz (typ.)
μs
Cycle
Display period
Cycle
th
thd
tv
CLK
CLK
ms
H
-
16.1
-
17.2
-
59.94Hz (typ.)
Vertical
DE
(One frame)
Display period
Setup time
tvd
tdes
tdeh
tderf
H
-
3
5
-
-
-
ns
CLK-DE
Hold time
-
ns
Rise time, Fall time
-
10
ns
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
tvf
33H (fixed)
12H (fixed)
480H (fixed)
Hsync
Hsync
1
2
3
1
DATA
(R0-R5)
(G0-G5)
(B0-B5)
D(X,0)
D(X,478)D(X,479)
D(X,Y)
INVALID
INVALID
(Note: X=0 to 639)
Hsync
DATA
(R0-R5)
(G0-G5)
(B0-B5)
D(0,Y)D(1,Y)
D(X,Y)
D(638,Y)D(639,Y)
INVALID
INVALID
1CLK
Hsync
thp
thb
144CLK (fixed)
thf
thd
640CLK (fixed)
16CLK (fixed)
CLK
1
2
1
DATA
(R0-R5)
(G0-G5)
(B0-B5)
D(0,Y)D(1,Y)
D(639,Y)
INVALID
INVALID
(Note: Y=0 to 479)
DATA SHEET DOD-PP-0251 (6th edition)
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NL6448BC20-18D
(b) DE mode
Horizontal timing
tc
1
CLK
DATA
INVALID
2
639 640
INVALID
(R0-R5)
(G0-G5)
(B0-B5)
DE
thd
th
Vertical timing
DATA
INVALID
INVALID
(R0-R5)
(G0-G5)
(B0-B5)
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
0.7VCC
0.3VCC
CLK
tcrf
tcrf
tds
tdh
DATA
INVALID
INVALID
(R0-R5)
0.7VCC
(G0-G5)
0.3VCC
(B0-B5)
tdrf
tdrf
tdeh
tderf
tdes
0.7VCC
DE
0.3VCC
tderf
0.7VCC
CLK
0.3VCC
ths
thh
0.7VCC
Hsync
0.3VCC
thrf
thrf
0.7VCC
Hsync
0.3VCC
tvhs
tvhh
tvrf
0.7VCC
0.3VCC
Vsync
tvrf
DATA SHEET DOD-PP-0251 (6th edition)
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NL6448BC20-18D
4.10 OPTICS
4.10.1 Optical characteristics
(Note1, Note2)
Parameter
Condition
Symbol
L
min.
280
typ.
400
max.
-
Unit Remarks
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°
Luminance
cd/m2
-
Contrast ratio
CR
LU
300
-
600
-
-
-
Note3
Note4
Luminance uniformity
1.25
1.4
x coordinate
y coordinate
x coordinate
y coordinate
x coordinate
y coordinate
x coordinate
y coordinate
Wx
Wy
Rx
Ry
Gx
Gy
Bx
By
0.283
0.313
0.329
0.582
0.344
0.328
0.528
0.156
0.146
0.343
-
-
-
-
-
-
-
-
White
0.299
0.359
-
-
-
-
-
-
-
-
-
-
-
-
Red
Chromaticity
Green
Note5
Blue
θR= 0°, θL= 0°, θU= 0°, θD= 0°
at center, against NTSC color space
Color gamut
C
35
40
-
%
White to Black
Ton
Toff
θR
-
6
15
47
-
ms
ms
°
Note6
Note7
Response time
Right
Black to White
-
19
80
80
80
60
70
70
70
50
θU= 0°, θD= 0°, CR≥ 10
θU= 0°, θD= 0°, CR≥ 10
θR= 0°, θL= 0°, CR≥ 10
θR= 0°, θL= 0°, CR≥ 10
Left
Viewing angle
Up
-
θL
°
Note8
-
θU
°
Down
-
θD
°
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)
1°
LCD module
(Product)
Note3: See "4.10.2 Definition of contrast ratio".
Note4: See "4.10.3 Definition of luminance uniformity".
Note5: These coordinates are found on CIE 1931 chromaticity diagram.
Note6: Product surface temperature: TopF= 32°C
Note7: See "4.10.4 Definition of response times".
Note8: 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
Contrast ratio (CR) =
Luminance of black screen
4.10.3 Definition of luminance uniformity
The luminance uniformity is calculated by using following formula.
Maximum luminance from ① to ⑤
Minimum luminance from ① to ⑤
Luminance uniformity (LU) =
The luminance is measured at near the 5 points shown below.
106
320
533
②
①
80
③
240
400
⑤
④
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.).
100%
90%
White
Luminance
Black
10%
0%
Toff
Ton
4.10.5 Definition of viewing angles
Normal axis (Perpendicular)
12 o’clock
θL
Upper
θR
θU
Left
θD
Right
Lower
DATA SHEET DOD-PP-0251 (6th edition)
23
NL6448BC20-18D
5. RELIABILITY TESTS
Test item
Condition
Judgment
① 60 ± 2°C, RH= 90%, 240hours
② Display data is black.
High temperature and humidity
(Operation)
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)
No display malfunctions
Note1
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)
① 150pF, 150Ω, ±10kV
② 9 places on a panel surface
③ 10 times each places at 1 sec interval
ESD
(Operation)
Note2
① Sample dust: No. 15 (by JIS-Z8901))
② 15 seconds stir
③ 8 times repeat at 1 hour interval
Dust
(Operation)
① 5 to 100Hz, 19.6m/s2
② 1 minute/cycle
③ X, Y, Z direction
Vibration
(Non operation)
No display malfunctions
No physical damages
④ 120 times each directions
① 539m/ s2, 11ms
② ±X, ±Y, ±Z direction
③ 5 times each directions
Note1
Mechanical shock
(Non operation)
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 All GND and VCC terminals should be used without any non-connected lines.
② Do not disassemble a product or adjust variable resistors.
③ See "REPLACEMENT MANUAL FOR LAMP HOLDER SET", when replacing backlight lamps.
④ Pay attention not to insert foreign materials inside of the product, when using tapping screws.
⑤ 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.
DATA SHEET DOD-PP-0251 (6th edition)
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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
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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