Page 1
TFT COLOR LCD MODULE
NL6448BC20-20
17cm (6.5 Type)
VGA
DATA SHEET
DOD-PP-0331 (4th edition)
This DATA SHEET is updated document from
DOD-PP-0126(3).
All information is subject to change without
notice. Please confirm the sales representative
before starting to design your system.
Document Number: DOD-PP-0331 (4th edition)
Published date: July 2007 CP(N)
1
© NEC LCD Technologies, Ltd.
2006, 2007 All rights reserved.
Page 2
NL6448BC20-20
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 th e
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-0331 (4th edition)
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NL6448BC20-20
CONTENTS
INTRODUCTION ........................................................................................................................................
1. OUTLINE..................................................................................................................................................
1.1 STRUCTURE AND PRINCIPLE ........................................................................................................
1.2 APPLICATION....................................................................................................................................
1.3 FEATURES..........................................................................................................................................
2. GENERAL SPECIFICATIONS..............................................................................................................5
3. BLOCK DIAGRAM.................................................................................................................................
4. DETAILED SPECIFICATIONS.............................................................................................................
4.1 MECHANICAL SPECIFICATIONS...................................................................................................
4.2 ABSOLUTE MAXIMUM RATINGS..................................................................................................
4.3 ELECTRICAL CHARACTERISTICS.................................................................................................
4.3.1 LCD panel signal processing board.............................................................................................
4.3.2 Backlight lamp.............................................................................................................................
4.3.3 Power supply voltage ripple.......................................................................................................
4.3.4 Fuse............................................................................................................................................
4.4 POWER SUPPLY VOLTAGE SEQUENCE.....................................................................................
4.4.1 LCD panel signal processing board...........................................................................................
4.4.2 Inverter.......................................................................................................................................
4.5 CONNECTIONS AND FUNCTIONS FOR INTERFACE PINS......................................................
4.5.1 LCD panel signal processing board...........................................................................................
4.5.2 Backlight lamp...........................................................................................................................
4.5.3 Positions of plug and socket ......................................................................................................
4.6 DISPLAY COLORS AND INPUT DATA SIGNALS.......................................................................
4.7 DISPLAY POSITIONS......................................................................................................................
4.8 SCANNING DIRECTIONS...............................................................................................................
4.9 INPUT SIGNAL TIMINGS ...............................................................................................................
4.9.1 Outline of input signal timings ..................................................................................................
4.9.2 Timing characteristics................................................................................................................
4.9.3 Input signal timing chart............................................................................................................
4.10 OPTICS.............................................................................................................................................
4.10.1 Optical characteristics..............................................................................................................
4.10.2 Definition of contrast ratio.......................................................................................................
4.10.3 Definition of luminance uniformity.........................................................................................
4.10.4 Definition of response times....................................................................................................
4.10.5 Definition of viewing angles....................................................................................................
5. RELIABILITY TESTS ..........................................................................................................................
6. PRECAUTIONS .....................................................................................................................................
6.1 MEANING OF CAUTION SIGNS....................................................................................................
6.2 CAUTIONS........................................................................................................................................
6.3 ATTENTIONS....................................................................................................................................
6.3.1 Handling of the product.............................................................................................................
6.3.2 Environment...............................................................................................................................
6.3.3 Characteristics............................................................................................................................
6.3.4 Other..........................................................................................................................................
7. OUTLINE DRAWINGS.........................................................................................................................
7.1 FRONT VIEW....................................................................................................................................
7.2 REAR VIEW ......................................................................................................................................
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DATA SHEET DOD-PP-0331 (4th edition)
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1. OUTLINE
1.1 STRUCTURE AND PRINCIPLE
Color LCD module NL6448BC20-20 is composed of the amorphous silicon thin film transistor
liquid crystal display (a-Si TFT LCD) panel structure with driver LSIs for driving the TFT (Thin Film
Transistor) array and a backlight.
The a-Si TFT LCD panel structure is injected liquid crystal material into a narrow gap between the
TFT array glass substrate and a color-filter glass substrate.
Color (Red, Green, Blue) data signals from a host system (e.g. signal generator, etc.) are modulated
into best form for active matrix system by a signal processing circuit, and sent to the driver LSIs
which drive the individual TFT arrays.
The TFT array as an electro-optical switch regulates the amount of transmitted light from the
backlight assembly, when it is controlled by data signals. Color images are created by regulating the
amount of transmitted light through the TFT array of red, green and blue dots.
1.2 APPLICATION
• For industrial use
1.3 FEATURES
• Adoption of ST-NLT (Super-Transmissive Natural Light TFT)
• High luminance
• High contrast
• Low reflection
• Wide viewing angle
• Wide temperature range
• 6-bit digital RGB signals
• Reversible-scan direction
• Edge light type (without inverter)
• Replaceable lamp for backlight
• Acquisition product for UL60950-1/CSA-C22.2 No.60950-1-03 (File number: E170632)
• Compliance with the European RoHS directive (2002/95/EC)
(From product which was produced after April. 1, 2006)
NL6448BC20-20
DATA SHEET DOD-PP-0331 (4th edition)
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2. GENERAL SPECIFICATIONS
Display area
NL6448BC20-20
132.48 (H) × 99.36 (V) mm
Diagonal size of display
Drive system
Display color
Pixel
Pixel arrangement
Dot pitch
Pixel pitch
Module size
Weight
Contrast ratio
Viewing angle
Designed viewing direction
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
0.069 (H) × 0.207 (V) mm
0.207 (H) × 0.207 (V) mm
153.0 (W) × 118.0 (H) × 10.5 (D) mm (typ.)
205g (typ.)
600:1 (typ.)
≥
At the contrast ratio
10:1
• Horizontal: Right side 80° (typ.), Left side 80° (typ.)
• Vertical: Up side 80° (typ.), Down side 60° (typ.)
At DPS= Low or open: Normal scan
• Viewing direction without image reversal: up side (12 o'clock)
• Viewing direction with contrast peak: down side (6 o'clock)
• Viewing angle with optimum grayscale (γ=2.2): normal axis
(perpendicular)
Polarizer surface
Polarizer pencil-hardness
Color gamut
Response time
Luminance
Signal system
Power supply voltage
Backlight
Power consumption
Clear + Antireflection (AR)
2H (min.) [by JIS K5400]
At LCD panel center
40% (typ.) [against NTSC color space]
Ton+Toff (10%
←→
90%)
25ms (typ.)
At IBL= 5.0mArms / lamp
650cd/m
2
(typ.)
6-bit digital signals for data of RGB colors,
Dot clock (CLK), Data enable (DE),
Horizontal synchronous signal (Hsync),
Vertical synchronous signal (Vsync)
LCD panel signal processing board: 3.3V or 5.0V
Edge light type: 2 cold cathode fluorescent lamps
Replaceable part
• Lamp holder set: Type No. 65LHS10
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.)
DATA SHEET DOD-PP-0331 (4th edition)
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k
3. BLOCK DIAGRAM
Host
LCD module (Product)
R0 to R5
G0 to G5
B0 to B5
CLK
Hsync
Vsync
DE
100Ω
100Ω
100Ω
100Ω
100Ω
100Ω
100Ω
47kΩ
DPS
GND
Note1
Note2
VCC
Fuse
FG
Note1
Note2
VDDB
GNDB
Note2
Note1: Relations between GND (Signal ground), FG (Frame ground) and VBLC (Lamp low voltage
terminal) in the LCD module are as follows.
GND - FG Connected
GND - VBLC Not connected
FG - VBLC Not connected
Note2: GND, FG and GNDB must be connected to customer equipment’s ground, and it is
recommended that these grounds are connected together in customer equipment.
Controller
Ω
47
Power supply
for gradation
DC/DC
converter
LCD panel signal processing board
VBLH
Inverter
VBLH
(Option)
VBLC
Note1
V-driver
NL6448BC20-20
H-driver
1,920 lines
LCD panel
H: 640 × 3 (R, G, B)
V: 480
480 lines
Backlight (Edge light type)
Lamp
Lamp
DATA SHEET DOD-PP-0331 (4th edition)
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4. DETAILED SPECIFICATIONS
4.1 MECHANICAL SPECIFICATIONS
Parameter Specification Unit
NL6448BC20-20
Module size
Display area
Weight 205 (typ.), 215 (max.) g
Note1: See "7. OUTLINE DRAWINGS".
4.2 ABSOLUTE MAXIMUM RATINGS
Parameter Symbol Rating Unit Remarks
Power supply
voltage
Input voltage
for signals
Operating temperature
LCD panel signal processing board VCC -0.3 to +6.5 V
Display signals
Function signal
Incident light intensity II 150,000 lx Note3
Storage temperature Tst -20 to +80
153.0 ± 0.5 (W) × 118.0 ± 0.5 (H) × 10.5 ± 0.5 (D)
132.48 (H) × 99.36 (V)
Lamp voltage VBLH 1,700 Vrms
Note1
Note2
Front surface TopF -10 to +70
Rear surface TopR -10 to +70
VD
-0.3 to VCC+0.3 V
VF
°C
°C
°C
Note1 mm
Note1 mm
Ta= 25°C
-
Note4
Note5
%
%
%
%
g/m3
Ta≤ 40°C
40 <Ta≤ 50°C
50°C <Ta≤ 60°C
60°C <Ta≤ 70°C
Ta> 70°C
Relative humidity
Note6
Absolute humidity
Note6
RH
AH
≤ 95
≤ 85
≤ 55
≤ 36
≤ 70
Note7
Note1: CLK, Hsync, Vsync, DE, DATA (R0 to R5 , G0 to G5, B0 to B5)
Note2: DPS
Note3: If the product surface (polarizer) is exposed to an ultraviolet ray, the polarizer may discolor
(Surface treatment may be damaged.). Use a filter to protect the polarizer from the ultraviolet
ray.
Note4: Measured at center of LCD panel surface (including self-heat)
Note5: Measured at center of LCD module's rear shield surface (including self-heat)
Note6: No condensation
Note7: Water amount at Ta= 70°C and RH= 36%
DATA SHEET DOD-PP-0331 (4th edition)
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4.3 ELECTRICAL CHARACTERISTICS
4.3.1 LCD panel signal processing board
Parameter Symbol min. typ. max. Unit Remarks
Power supply voltage VCC
NL6448BC20-20
(Ta= 25°C)
3.0 3.3 3.6 V at VCC= 3.3V
4.75 5.0 5.25 V at VCC= 5.0V
Power supply current ICC
Logic input voltage for
display signals
Input voltage for DPS
signal
High VDH 0.7VCC - VCC V
Low VDL 0 - 0.3VCC V
High VFH 0.7VCC - VCC V
Low VFL 0 - 0.3VCC V
Note1: Checkered flag pattern [by EIAJ ED-2522]
Note2: Pattern for maximum current
-
-
210
Note1
165
Note1
330
Note2
255
Note2
mA at VCC= 3.3V
mA at VCC= 5.0V
CMOS level
DATA SHEET DOD-PP-0331 (4th edition)
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×
4.3.2 Backlight lamp
Lamp current
Lamp voltage
Lamp starting voltage
Lamp oscillation frequency
Note1: This product consists of 2 backlight lamps, and these specifications are for each lamp.
Note2: The lamp voltage cycle between lamps should be kept on a same phase. "VS" and "VBLH"
Note3: The asymmetric ratio of working waveform for lamps (Power supply voltage peak ratio,
Note4: This product consists of 2 lamps. 2 lamps are contained in the 1 lamp holder, and both lamps
Note5: The inverter should be designed so that the lamp starting voltage can be maintained for more
Note6: In case "FO" is not the recommended value, beat noise may display on the screen, because of
Note7: Method of lamp cable installation may invite fluctuation of lamp current and voltage or
NL6448BC20-20
(Ta= 25°C, Note1)
Parameter Symbol min. typ. max. Unit Remarks
Note3, Note4
Note2, Note3
Note2, Note3, Note5, Note8
Note6
IBL 2.0 5.0 5.5 mArms
VBLH - 360 - Vrms -
VS
FO 50 55 60 kHz -
870 - - Vrms
960 - - Vrms
are the voltage value between low voltage side (Cold) and high voltage side (Hot).
power supply current peak ratio and waveform space ratio) should be less than 5 % (See the
following figure.). If the waveform is asymmetric, DC (Direct current) element apply into the
lamp. In this case, a lamp lifetime may be shortened, because a distribution of a lamp
enclosure substance inclines toward one side between low voltage terminal (Cold terminal)
and high voltage terminal (Hot terminal). When designing the inverter, evaluate asymmetric
of lamp working waveform sufficiently.
Pa
Pb
Sa
0
Sb
|Pa - Pb|
Pb
|Sa - Sb|
Sb
× 100 ≤ 5%
× 100 ≤ 5%
Pa: Supply voltage/current peak for positive, Pb: Supply voltage/current peak for negative
Sa: Waveform space for positive part, Sb: Waveform space for negative part.
are connected to 1 low voltage cable. Recommended lamp current is 5.0mArms typical for
each lamp, and sum of 2 lamps is 10mArms typical. The lamp current should be measured by
high-frequency current meter at the low voltage terminal.
than 1 second. Otherwise the lamp may not be turned on.
interference between "FO" and "1/th". Recommended value of "FO" is as following
FO
=
1
4
×
th
1
(2n-1)
th: Horizontal cycle (See "4.9.2 Timing characteristics".)
n: Natural number (1, 2, 3 ⋅⋅⋅⋅⋅⋅⋅⋅)
asymmetric of lamp working waveform. When designing method of lamp cable installation,
evaluate the fluctuation of lamp current, voltage and working waveform sufficiently.
at IBL=5.0mArms:
L= 650cd/m2
Ta= 25°C
Ta= -10°C
DATA SHEET DOD-PP-0331 (4th edition)
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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)
Transformer
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
VCC
Ballast condenser
Inverter
3.3V
5.0V
NL6448BC20-20
(Lamp side)
Connector
Probe capacity
Ripple voltage Note1
(Measure at input terminal of power supply)
≤ 100
≤ 100
High voltage probe
VS
Unit
mVp-p
mVp-p
Note1: The permissible ripple voltage includes spike noise.
4.3.4 Fuse
Parameter
Type Supplier
VCC FCC16202AB
Fuse
KAMAYA
ELECTRIC Co., Ltd
Rating Fusing current Remarks
2.0A
4.0A Note1
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-0331 (4th edition)
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4.4 POWER SUPPLY VOLTAGE SEQUENCE
4.4.1 LCD panel signal processing board
VCC
Note1
3.0V or 4.75V
0V
Display signals
Function signal
Note2
0V
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)
Display signals
Function signals
Note1
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 p eriod of display and function signals, in
order to avoid unstable data display.
Tr < 30ms
VALID period
Note2
VALID period
OFF ON
0ms < t < 35ms
NL6448BC20-20
ON
Toff > 50ms
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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 Note1
2 CLK Dot clock
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 Note1
27 DE Selection of DE / Fixed mode
28 VCC Power supply
29 VCC Power supply
30 N.C. - Keep this pin Open.
31 DPS Selection of scan direction
Note1: All GND and VCC terminals should be used without any non-connected lines.
Note2: See "4.8 SCANNING DIRECTIONS".
NL6448BC20-20
-
-
-
-
Data enable signal: DE mode
High or Open: Fixed mode
Note1
High: Reverse scan
Low or Open: Normal scan Note2
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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 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 plug and socket
CN2
High voltage (Hot)
4
2
1
Low voltage (Cold)
High voltage
caution marking
Disposal method
marking for lamp
Rear side
Barcode label Name plate label
NL6448BC20-20
1
3
31
CN1
2
30
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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.
Display colors
Black
Blue
Red
Magenta
Green
Basic colors
Red gray scale
Green gray scale
Blue gray scale
Cyan
Yellow
White
Black
dark
↑
↓
bright
Red
Black
dark
↑
↓
bright
Green
Black
dark
↑
↓
bright
Blue
R5 R4 R3 R2 R1 R0 G5 G4 G3 G2 G1 G0 B5 B4 B3 B2 B1 B0
000000
000000
111111
111111
000000
000000
111111
111111
000000
000001
000010
:
:
111101
111110
111111
000000
000000
000000
:
:
000000
000000
000000
000000
000000
000000
:
:
000000
000000
000000
Data signal (0: Low level, 1: High level)
000000
000000
000000
000000
111111
111111
111111
111111
000000
000000
000000
:
:
000000
000000
000000
000000
000001
000010
:
:
111101
111110
111111
000000
000000
000000
:
:
000000
000000
000000
000000
111111
000000
111111
000000
111111
000000
111111
000000
000000
000000
000000
000000
000000
000000
000000
000000
000000
000000
000000
000000
000001
000010
111101
111110
111111
NL6448BC20-20
:
:
:
:
:
:
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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.
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
∙
∙
∙
∙
∙
∙
∙
∙ ∙ ∙
∙
∙
∙ ∙ ∙
∙
C (0, 0)
D (0, 0)
C (0, 479)
D (0, 479)
∙
∙
∙
∙
∙
∙
C (639, 0)
D (639, 0)
C (639, 479)
D (639, 479)
Figure1. Normal scan (DPS: Low or Open)
C (0, 0)
D (639, 479)
C (0, 479)
D (639, 0)
C (639, 0)
D (0, 479)
C (639, 479)
D (0, 0)
Figure2. Reverse scan (DPS: High)
∙
∙ ∙ ∙
∙
∙
∙ ∙ ∙
∙
Note1
Note1
NL6448BC20-20
∙
∙
∙
∙
∙
∙
∙
∙ ∙ ∙
∙
∙
∙
∙
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4.9 INPUT SIGNAL TIMINGS
4.9.1 Outline of input signal timings
• Horizontal signal
Note1
Hsync
Note2
Display period
DE (Data enable)
• Vertical signal
Note1
Vsync
Note2
Display period
DE (Data enable)
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.
NL6448BC20-20
Horizontal synchronizing cycle (th)
Horizontal synchronizing pulse width (thp)
Horizontal back-porch (thb)
Horizontal display period (thd)
Vertical synchronizing cycle (tv)
Vertical synchronizing pulse width (tvp)
Vertical back-porch (tvb)
Vertical display period (tvd)
1 2 3 4 480 Note3
Horizontal front-porch (thf)
Vertical front-porch (tvf)
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4.9.2 Timing characteristics
(a) Fixed mode
NL6448BC20-20
(Note1)
Parameter Symbol min. typ. max. Unit Remarks
Frequency 1/tc 21.0 25.175 29.0 MHz 39.72ns (typ.)
CLK
DATA
(R0-R5)
(G0-G5)
(B0-B5)
Hsync
Duty tcd 0.4 0.5 0.6 -
Rise time, Fall time tcrf - - 10 ns
CLK-DATA
Rise time, Fall time tdrf - - 10 ns
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 144 CLK Note2
CLK- Hsync
Rise time, Fall time thrf - - 10 ns
Setup time tds 3 - - ns
Hold time tdh 5 - - ns
30.0 31.778 33.6
Cycle th
800 CLK
Setup time ths 3 - - ns
Hold time thh 5 - - ns
16.1 16.683 17.2 ms 59.94Hz (typ.)
Cycle tv
525 H
μs
-
-
31.468kHz (typ.)
-
-
Display period tvd 480 H
Front-porch tvf 12 H
Pulse width tvp 1 2 - H
Vsync
Back-porch tvb - 31 32 H
Total of pulse width and back-porch tvp + tvb 33 H Note2
Setup time tvhs 3 - - ns
Hsync-Vsync
Hold time tvhh 5 - - ns
Rise time, Fall time tvrf - - 10 ns
-
-
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.
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NL6448BC20-20
(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.)
CLK
DATA
(R0-R5)
(G0-G5)
(B0-B5)
DE
CLK-DATA
Horizontal
Vertical
(One frame)
CLK-DE
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
Cycle th
30.0 31.778 33.6
- 800 - CLK
Display period thd 640 CLK
16.1 16.683 17.2 ms 59.94Hz (typ.)
Cycle tv
- 525 - H
Display period tvd 480 H
Setup time tdes 3 - - ns
Hold time tdeh 5 - - ns
Rise time, Fall time tderf - - 10 ns
31.468kHz (typ.)
μs
-
-
-
-
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 these pins open to avoid noise problem.
Note3: Vertical cycle (tv) should be specified in integral multiple of Horizontal cycle (th).
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4.9.3 Input signal timing chart
(a) Fixed mode
Vsync
Hsync
Hsync
DATA
(R0-R5)
(G0-G5)
(B0-B5)
INVALID
Hsync
DATA
(R0-R5)
(G0-G5)
(B0-B5)
INVALID
Hsync
CLK
DATA
(R0-R5)
(G0-G5)
(B0-B5)
1
1
tvp
2
thp
tvb tvd
33H (fixed)
3
D(X,0)
D(0,Y)D(1,Y) D(X,Y) D(638,Y)D(639,Y)
thb
144CLK (fixed)
2
INVALID
1H
480H (fixed)
D(X,Y)
D(0,Y)D(1,Y) D(639,Y)
D(X,478)D(X,479)
1CLK
640CLK (fixed)
12H (fixed)
thd
NL6448BC20-20
tvf
1
INVALID
(Note: X=0 to 639)
INVALID
thf
16CLK (fixed)
1
INVALID
(Note: Y=0 to 479)
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NL6448BC20-20
(b) DE mode
Horizontal timing
CLK
DATA
(R0-R5)
(G0-G5)
(B0-B5)
DE
Vertical timing
DATA
(R0-R5)
(G0-G5)
(B0-B5)
DE
INVALID
INVALID
tc
1 2 639 640
thd
1 2 479 480
tvd
tv
INVALID
th
INVALID
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(c) Common item of Fixed mode and DE mode
tc
tch
DE
0.7VCC
0.3VCC
tcrf tcrf
INVALID
0.7VCC
0.3VCC
tdrf
0.7VCC
0.3VCC
tderf tderf
0.7VCC
0.3VCC
0.7VCC
0.3VCC
thrf thrf
0.7VCC
CLK
DATA
(R0-R5)
(G0-G5)
(B0-B5)
CLK
Hsync
Hsync
0.3VCC
Vsync
0.7VCC
0.3VCC
tvrf
tvhs
tds
tdes
ths
NL6448BC20-20
tdh
INVALID
tdrf
tdeh
thh
tvhh
tvrf
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4.10 OPTICS
4.10.1 Optical characteristics
Parameter Condition Symbol min. typ. max. Unit
Luminance
Contrast ratio
Luminance uniformity
White
Red
Chromaticity
Green
Blue
Color gamut
Response time
Right
Viewing angle
Left
Up
Down
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.
LCD module
(Product)
Note3: See "4.10.2 Definition of contrast ratio".
Note4: See "4.10.3 Definition of luminance uniformity".
Note5: Th ese coord inates 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".
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 Wx 0.283 0.313 0.343 -
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 Ton - 6 15 ms
Black to White Toff - 19 47 ms
θU= 0°, θD= 0°, CR≥ 10 θR
θU= 0°, θD= 0°, CR≥ 10 θL
θR= 0°, θL= 0°, CR≥ 10 θU
θR= 0°, θL= 0°, CR≥ 10 θD
50cm
1°
Photodetector (BM-5A or SR-3)
NL6448BC20-20
(Note1, Note2)
Measuring
instrument
2
L 450 650 - cd/m
CR 300 600 - - BM-5A Note3
LU - 1.25 1.4 - BM-5A Note4
C 35 40 - %
70 80 70 80 70 80 50 60 -
Photodetector (EZ Contrast)
LCD module
(Product)
BM-5A -
SR-3 Note5
BM-5A
°
°
Contrast
°
°
EZ
Remarks
Note6
Note7
Note8
DATA SHEET DOD-PP-0331 (4th edition)
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N
4.10.2 Definition of contrast ratio
The contrast ratio is calculated by using the following formula.
Contrast ratio (CR) =
4.10.3 Definition of luminance uniformity
The luminance uniformity is calculated by using following formula.
Luminance uniformity (LU) =
The luminance is measured at near the 5 points shown below .
80
240
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%
4.10.5 Definition of viewing angles
ormal axis (Perpendicular)
θL
Left
θD
Lower
106
①
④
θU
Luminance of white screen
Luminance of black screen
Maximum lumina nce from ①
Minimum lumina nce from ① to ⑤
320
533
②
③
⑤
Ton
12 o’clock
Upper
θR
Right
NL6448BC20-20
to ⑤
Toff
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5. RELIABILITY TESTS
Test item Condition Judgment
High temperature and humidity
(Operation)
NL6448BC20-20
(Note1)
① 60 ± 2°C, RH= 90%, 240hours
② Display data is black.
High temperature
(Operation)
Heat cycle
(Operation)
Thermal shock
(Non operation)
ESD
(Operation)
Dust
(Operation)
Vibration
(Non operation)
Mechanical shock
(Non operation)
① 70 ± 3°C, 240hours
② Display data is black.
① -10 ± 3°C…1hour
70 ± 3°C…1hour
② 50cycles, 4 hours/cycle
③ Display data is black.
① -20 ± 3°C…30minutes
80 ± 3°C…30minutes
② 100cycles, 1hour/cycle
③ Temperature transition time is within
5 minutes.
① 150pF, 150Ω, ±10kV
② 9 places on a panel surface Note2
③ 10 times each places at 1 sec interval
① Sample dust: No. 15 (by JIS-Z8901))
② 15 seconds stir
③ 8 times repeat at 1 hour interval
① 5 to 100Hz, 19.6m/s
② 1 minute/cycle
③ X, Y, Z direction
④ 120 times each directions
① 539m/ s
② ±X, ±Y, ±Z direction
③ 5 times each directions
2
, 11ms
2
No display malfunctions
No display malfunctions
No physical damages
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.
{ {
{
{
{
{
{
{
{
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!
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.
NL6448BC20-20
∗ 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/s
11ms, Pressure: To be not greater 19.6 N (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 0.147 N⋅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.
⑧ Do not push nor pull the interface connectors while the product is working.
2
and to be not greater
!
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⑨ Do not bend or unbend the lamp cable at the near part of the lamp holding rubber, to avoid the
⑩ Properly connect the plug (backlight side) to adaptable socket (inverter side) without incomplete
⑪ If the lamp cable is attached on the metal part of the product directly, high frequency leak current
⑫ When handling the product, use of an original protection sheet on the product surface (polarizer) is
⑬ Usually liquid crystals don't leak through the breakage of glasses because of the surface tension of
6.3.2 Environment
① Do not operate or store in high temperature, high humidity, dewdrop atmosphere or corrosive
② In order to prevent dew condensation occurring by temperature difference, the product packing
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
④ Do not display the fixed pattern for a long time because it may cause image sticking. Use a screen
⑤ The display color may be changed depending on viewing angle because of the use of condenser
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
⑧ The color of the polarizer surface may differ between products because of antireflection treatment.
⑨ After the product is stored under condition of low temperature or dark place for a long time, the
NL6448BC20-20
damage for high voltage side of the lamp.
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.
to the metal part may occur, then the brightness may decrease or the lamp may not be turned on.
recommended for protection of product surface. Adhesive type protection sheet may change color
or characteristics of the polarizer.
thin layer and the construction of LCD panel. But, if you contact with liquid crystal for the worst,
please wash it out with soap.
gases. Keep the product in packing box with antistatic pouch in room temperature to avoid dusts
and sunlight, when storing the product.
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)
depending on operating time, and especially low temperature, because the LCD has cold cathode
fluorescent lamps.
saver, if the fixed pattern is displayed on the screen.
sheet in the backlight.
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.
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.
DATA SHEET DOD-PP-0331 (4th edition)
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NL6448BC20-20
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.
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7. OUTLINE DRAWINGS
7.1 FRONT VIEW
NL6448BC20-20
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.
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7.2 REAR VIEW
NL6448BC20-20
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.
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