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DATA SHEET
TFT COLOR LCD MODULE
NL6448AC20-06
17 cm (6.5 type), 640 x 480 pixels 262144/4096 colors, incorporated edge-light type backlight high brightness, inverter separated from module
DESCRIPTION
NL6448AC20-06 is a TFT(thin film transistor) active matrix color liquid crystal display(LCD) comprising amorphous silicon TFT attached to each signal electrode, a driving circuit and a backlight. NL6448AC20-06 has a builtin backlight. Backlight includes long-life-lamps and its lamps are replaceable. The 17cm diagonal display area contains 640 x 480 pixels and can display 4096 or 262144 colors simultaneously. NL6448AC20-06 is suitable for industrial application use, because the luminance is high, and the viewing direction is selectable by display scan select.
FEATURES
TM High luminance (200 cd/m2 Typ.: saturated value) TM Low reflection TM Wide viewing angle with retardation film TM Display reverse scan function TM 6-bit/4-bit digital RGB signals TM Edge type backlight with long-life-lamps (Two lamp holders, inverter) TM Variable luminance control TM Backlight lamp holder (65LHS-3L) replaceable TM Compatible to the mounting hole position of NL6448AC20-02 except for inverter.
APPLICATIONS
TM Measuring instruments TM Display terminals for control system TM New media TM Control boards for NC machine TM Monitor for process controller
Document No. EN0323EJ1V0DS00 (1st edition) Date Published July 1997 M Printed in Japan
(c)
1997
NL6448AC20- 06
STRUCTURE AND FUNCTIONS
A TFT color LCD module comprises a TFT LCD panel, LSIs for driving liquid crystal, and a backlight. The TFT LCD panel is composed of a TFT array glass substrate superimposed on a color filter glass substrate with liquid crystal filled in the narrow gap between two substrates. The backlight apparatus is located on the backside of the LCD panel. RGB (Red, Green, Blue) data signals are sent to LCD panel drivers after modulation into suitable forms for active matrix addressing through signal processor. Each of the liquid crystal cells acts as an electro-optical switch that controls the light transmission from the backlight by a signal applied to a signal electrode through the TFT switch.
BLOCK DIAGRAM
H - driver
R0 - R5 G0 - G5 B0 - B5
V - driver 480 lines
960 lines Digital signal processor Level shift
TFT LCD panel H : 640 x 3 (RGB) V : 480
CLK Hsync Vsync DE DPS LCD timing controller
960 lines
H - driver
VCC
Power supply circuit
LSIs Drivers Backlight
VDD
Inverter
BRTL BRTH GNDB
GND(SG) Frame(FG)
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NL6448AC20-06
OUTLINE OF CHARACTERISTICS (at room temperature)
Display area Drive system Display colors Number of pixels Pixel arrangement Pixel pitch Module size Inverter size Weight Contrast ratio 132.48 (H) x 99.36 (V) mm a-Si TFT active matrix 262144 or 4096 colors 640 x 480 RGB vertical stripe 0.207 (H) x 0.207 (V) mm 178.8(H) x 126.8(V) x 11.0 Typ. (D) mm 26 (H) x 105 (V) x 9.5 Typ. (D) mm 237g (Typ.) + 17g (Typ., inverter) 150 : 1 (Typ.)
Viewing angle (more than the contrast ratio of 10:1) * Horizontal : 50 (Typ. left side, right side) * Vertical : 35 (Typ. up side), 45 (Typ. down side) Designed viewing direction * wider viewing angle with contrast ratio : up side (12 o'clock, reverse scan) : down side (6 o'clock, normal scan) * wider viewing angle without image reversal : up side (12 o'clock, normal scan) : down side (6 o'clock, reverse scan) * optimum grayscale ( = 2.2) : perpendicular Color gamut 45% (Typ. At center, To NTSC) Response time Luminance Signal system Supply voltage Backlight Power consumption 40ms (Max.), "white" to "black" 200cd/m2 (Typ.) 6-/4-bit digital signals for each of RGB primary colors, Synchronous signals (Hsync, Vsync), Dot clock (CLK) 5.0V (Logic, LCD driving), 5.0V (Backlight) Edge light type: two fluorescent lamps (cold cathode type) 6.0W (Typ.)
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NL6448AC20-06
SUPPLY VOLTAGE SEQUENCE
4.75 V VCC 0V t<150 ms Signal 0V Power-on Power-off VALID 01 The supply voltage for input signals should be the same as VCC. 2 Apply VDD within the LCD operation period. When the backlight turns on before LCD operation or the LCD operation turns off before the backlight turns off, the display may momentarily become white. 3 When the power is off, please keep whole signals (Hsync, Vsync, CLK, DE, and DATA) low level or high impedance.
INTERFACE PIN CONNECTION
Module side connector CN31 * * * IL-310-T31PB-VF (No. 1 to 31) Supplier : Japan Aviation Electronics Industry Limited (JAE) (1) 6-bit interface signals, power supply
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol GND CLK Hsync Vsync GND R0 R1 R2 R3 R4 R5 GND G0 G1 G2 G3 Ground Dot clock Horizontal synchronous Vertical synchronous Ground Red data (LSB) Red data Red data Red data Red data Red data (MSB) Ground Green data (LSB) Green data Green data Green data Function Pin No. 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Symbol G4 G5 GND B0 B1 B2 B3 B4 B5 GND DE VCC VCC N.C. DPS Function Green data Green data (MSB) Ground Blue data (LSB) Blue data Blue data Blue data Blue data Blue data (MSB) Ground Data enable Power supply Power supply Non-connection (Open) Display scan select
Mating connector IL-310-T31S-VF or DF9-31S-1V or DF9M-31S-1R Supplier : HIROSE ELECTRIC CO., LTD
LSB : Least Significent Bit MSB : Most Significent Bit
note 1 : VCC : All VCC terminals should be connected to 5.0 V. note 2 : DPS : Normal scan is "L"or "Open". And reverse scan is "H". note 3 : During the operation, do not change the operation mode : e. g. scan direction and 4/6-bit signal. note 4 : Do not operate LCD module without input DE signal.
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NL6448AC20- 06
(2) 4-bit interface signals, power supply
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol GND CLK Hsync Vsync GND N.C. N.C. R0 R1 R2 R3 GND VCC N.C. G0 G1 Ground Dot clock Horizontal synchronous Vertical synchronous Ground Non-connection (Open) Non-connection (Open) Red data (LSB) Red data Red data Red data (MSB) Ground Power supply Non-connection (Open) Green data (LSB) Green data Function Pin No. 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Symbol G2 G3 GND N.C. N.C. B0 B1 B2 B3 GND DE VCC VCC N.C. DPS Function Green data Green data (MSB) Ground Non-connection (Open) Non-connection (Open) Blue data (LSB) Blue data Blue data Blue data (MSB) Ground Data enable Power supply Power supply Non-connection Display scan select
LSB : Least Significent Bit MSB : Most Significent Bit
note 1 : VCC : All VCC terminals should be connected to 5.0 V. note 2 : DPS : Normal scan is "L"or "Open". And reverse scan is "H". note 3 : During the operation, do not change the operation mode : e. g. scan direction and 4/6-bit signal. note 4 : Do not use operate LCD module without input DE signal.
(3) Backlight * Inverter side connector 1 CN1 * * * IL-Z-6PL-SMTY Mating connector 1 IL-Z-6S-S125C3
Supplier : Japan Aviation Electronics Industry Limited (JAE)
Pin No. 1 2 3 Symbol GNDB GNDB VDD Function Backight ground Backight ground Power supply Pin No. 4 5 6 Symbol VDD BRTH BRTH Function Power supply Luminance control input Luminance control input
* Inverter side connector 2 CN2 and CN3 * * * SM02 (8.0) B-BHS-TB
Mating connector 2 (Lamp side) BHR-03VS-1
Supplier : J. S. T TRADING COMPANY, LTD.
Pin No. 1 2 3 Symbol VH N.C. GNDB Function High voltage terminal Non-connection Backight ground
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NL6448AC20-06
note : q A way of luminance control by a variable resistor
Mating variable resistor BRTL R BRTH
: 10 k5%
Minimum luminance (Approx.15) : R = 0 Maximum luminance (100%) : R = 10 k
w A way of luminance control by a voltage The range of input voltage between BRTH and GNDB is as follows. Minimum luminance (Approx. 15%) : 1.52 V Maximum luminance (100%) : 1.9 V e Connector location
Upper side
To CN2 or CN3 3 2 1 To CN2 or CN3
LCD module
CN31
1 3
* *
2 4
* * * * *
Lower side
* * *
31 3 CN3 2 1 1 CN2 2 3 CN1 4 Inverter 5 6
30

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NL6448AC20- 06
DISPLAY COLORS
VS.
INPUT DATA SIGNALS
Data signals (0 : Low level, 1 : High level) R5 R4 R3 R2 R1 R0 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 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 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 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 0 0 1 1 0 0 1 1 0 0 1 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 G5 G4 G3 G2 G1 G0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 1 0 1 1 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 1 0 1 0 1 0 0 0 0 0 0 B5 B4 B3 B2 B1 B0 0 1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 0 1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 1
(1) 6-bit interface signals
Display colors Black Blue Red Magenta Green Cyan Yellow White Black Dark Bright Red Black Dark Bright green Black Dark Bright Blue
Basic colors
Red grayscale
Green grayscale
Blue grayscale
Note : Colors are developed in combination with 6 bit signal (64 steps in grayscale) of each primary red, green, and blue color. This process can result in up to 262144 (64 x 64 x 64) colors.
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NL6448AC20-06
(2) 4-bit interface signals
Display colors Black Blue Red Magenta Green Cyan Yellow White Black Dark Bright Red Black Dark Bright green Black Dark Bright Blue Data signals (0 : Low level, 1 : High level) R3 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 R2 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 R1 0 0 1 1 0 0 1 1 0 0 1 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 R0 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 G3 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 G2 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 G1 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 1 0 1 1 0 0 0 0 0 0 G0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 1 0 1 0 1 0 0 0 0 0 0 B3 0 1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 B2 0 1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 B1 0 1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 B0 0 1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 1
Basic colors
Red grayscale
Green grayscale
Blue grayscale
Note : Colors are developed in combination with 4 bit signal (16 steps in grayscale) of each primary red, green, and blue color. This process can result in up to 4096 (16 x 16 x 16) colors.
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NL6448AC20- 06
INPUT SIGNAL TIMING
(1) Input signal specifications
Parameter Frequency CLK Duty Rise, fall Period Display period Front-porch Pulse width Hsync Back-porch Symbol 1 /tc t ch / t c t crf th t hd t hf t hp t hb ) t hp +t hb CLK-Hsync timing Hsync-CLK timing Hsync-Vsync timing Vsync-Hsync timing Rise, fall Period Display period Vsync Front-porch Pulse width Back-porch t hch t hcx t vh t vs t hrf tv t vd t vf t vp t vb ) t vp + t vb Rise, fall DATA R0-R5 G0-G5 B0-B5 CLK-DATA timing DATA-CLK timing Rise, fall DE-CLK timing DE CLK-DE timing Rise, fall t ds t dh t drf t es t eh t erf 1 2 4 6 - - 8 12 - - 8 12 - - 2 10 5 64 12 8 15 15 - - 16.1 - - Min. 21.0 0.4 - - 30.0 - - Typ. 25.175 0.5 - - 31.778 800 640 16 96 48 144 - - - - - - - - - - 16.683 525 480 12 2 31 33 - - - - - - - - - - - - - - - - - - - - - - 10 - - - - 10 - - - - 10 - - - - - - - - - - - - - - - - 10 17.2 - - Max. 29.0 0.6 10 33.6 - - Unit MHz - - ns Remarks 39.722 ns (Typ.) - - - - 31.468 kHz (Typ.) - - - - - - - - - - - - - - - - - - - - 59.94 Hz (Typ.) - - - - - - - - - - - - - - - - - -
s
CLK CLK CLK CLK CLK CLK ns ns ns ns ns ms H H H H H H ns ns ns ns ns ns ns
- -
note 1 : All parameters should be kept within the specified range. note 2 : Do not operate LCD module without input DE signal.
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NL6448AC20-06
(2) Definition of input signal timing

tv
tvp
Vsync
tvb
tvf
Display period
note 1
tvd
DE

th
thp
Hsync
thb
thf
Display period
note 1
thd
DE
note 1 : Display period does not exist as signals. note 2 : Set the total of thp + thb and tvp + tvb as the table of input signal timing, otherwise display position is shifted to right or left side, or to up or down side. note 3 : Do not operate LCD module without input DE signal.
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NL6448AC20- 06
tc tch VIH 1.5 V VIL tcrf tcrf
CLK
tds DATA (R0 to R5) VIH (G0 to G5) 1.5 V (B0 to B5) VIL INVALID
tdh INVALID
tdrf
tdrf
teh VIH 1.5 V VIL
tes
teh
tes
DE
terf
terf
CLK
1.5 V thch VIH 1.5 V VIL thrf thcs
Hsync
Hsync
1.5 V tvh VIH 1.5 V VIL tvrf tvs
Vsync
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NL6448AC20-06
(3) Input signal timing chart
Vsync 1H tvp tvb 480H (fixed) tvf
Hsync 123 1
DE
R0 to R5 G0 to G5 B0 to B5 INVALID D(X,0) D(X,Y) D(X,479) INVALID (note: X = 0 to 639)
DE
R0 to R5 G0 to G5 B0 to B5 INVALID D(0,Y) D(1,Y) D(X,Y) D(638,Y) D(639,Y) INVALID
Hcync 1CLK thp thb 640CLK (fixed) thf
CLK 1 DE 2 1
R0 to R5 G0 to G5 B0 to B5 INVALID D(0,Y) D(1,Y) D(639,Y) INVALID (note: Y = 0 to 479)
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NL6448AC20- 06
DISPLAY POSITION
Normal scan: DPS = "L" or "OPEN"
D (0, 0) D (0, 1) D (1, 0) D (1, 1) D (X, 0) D (X, 1) D (638, 0) D (638, 1) D (639, 0) D (639, 1)
D (0, Y)
D (1, Y)
D (X, Y)
D (638, Y)
D (639, Y)
D (0, 478) D (0, 479)
D (1, 478) D (1, 479)
D (X, 478) D (X, 479)
D (638, 478) D (638, 479)
D (639, 478) D (639, 479)
Reverse scan: DPS = "H"
D (639, 479) D (639, 478) D (638, 479) D (638, 478) D (X, 479) D (X, 478) D (1, 479) D (1, 478) D (0, 479) D (0, 478)
D (639, Y)
D (638, Y)
D (X, Y)
D (1, Y)
D (0, Y)
D (639, 1) D (639, 0)
D (638, 1) D (638, 0)
D (X, 1) D (X, 0)
D (1, 1) D (1, 0)
D (0, 1) D (0, 0)
note 1 : Below drawings show relations between the scan direction and the viewing direction.
Normal scan
Reverse scan
D (0, 0) D (0, 0) D (639, 0)
D (639, 0) CN 31
CN 31 D (0, 479) D (639, 479) D (0, 479) D (639, 479)
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NL6448AC20-06
OPTICAL CHARACTERISTICS
Parameter Horizontal Symbol Condition CR>10, y = 0 CR>10, y = 0 CR>10, x = 0 CR>10, x = 0 Min. 45 45 30 40 80 -- -- 40 150 -- Typ. 50 50 35 45 150 250 -- 45 200 -- Max. -- -- -- -- -- -- 40 -- -- 1.25
Ta = 25C note 1 Unit deg. deg. deg. deg. -- -- ms % cd/m2 -- note 3 and note 4 note 5 -- note 6 note 7 note 2 Remark
x+ x- y+ y-
CR t pd C Lu --
Viewing angle range
Vertical
Contrast ratio Response time Color gamut Luminance Luminance uniformity
= 2.2 viewing
Best contrast White to black at center, to NTSC note 3 max./min
note 1 : VCC = 5.0 V, VDDB = 5.0 V note 2 : Definitions of viewing angle are as follows. Normal 12 0'clock
x-
Left
y+ x+
Upper
y-
Lower Right
note 3 : = 2.2 viewing angle : x = 0, y = 0. At center. Best cotrast angle : x = 0, y = -10. At center. note 4 : The contrast ratio is calculated by using the following formula. Contrast ratio (CR) = Luminance with all pixels in "white" Luminance with all pixels in "black"
The Luminance is measured in darkroom. note 5 : Definition of response time is as follows. Photodetector output signal is measured when the Luminance changes "white" to "black". Response time is the time between 10% and 100% of the photodetector output amplitude.
100% WHITE Luminance BLACK 10% tpd (Response)
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NL6448AC20- 06
note 6 : The luminance is measured after 20 minutes from the module works, with all pixels in "white". Typical value is measured after luminance saturation.
1 Photodetector (TOPCON BM-5A)
50 cm LCD MODULE
note 7 : The luminance uniformity is calculated by using following formula. Luminance uniformity = Maximum luminance Minimum luminance
The luminance is measured at near the five points shown below.
Column
(160)
(320)
(480) Line
1 3 2
4
(120) (240)
5
(360)
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NL6448AC20-06
GENERAL CAUTION
Next figures and sentence are very important, please understand these contents as foIIows. This figure is a mark that you will get hurt and/or the module will have damages CAUTION when you make a mistake to operate.
This figure is a mark that you will get an electric shock when you make a mistake to operate.
This figure Is a mark that you will get hurt when you make a mlstake to operate
CAUTION Do not touch an inverter --on which is stuck a caution label-- while the LCD module is under the operatlon, because of dangerous high voltage.
(1) Caution when taking out the module q Pick the pouch only, in taking out module from a carrier box. (2) Caution for handling the module q As the electrostatic discharges may break the LCD module, handle the LCD module with care against electrostatic discharges. w As the LCD panel and backlight element are made from fragjle glass material, impulse and pressure to the LCD module should be avoided. e As the surface of polarizer is very soft and easily scratched, use a soft dry cloth without chemicals for cleaning. r Do not pull the interface connectors in or out while the LCD module is operating. t Put the module display side down on a flat horizontal plane. y Handle connectors and cables with care. u When the module is operating, do not lose CLK, Hsync, or Vsync signal. If any one of these signals is lost, the LCD panel would be damaged. i The torque to nrounting screw should never exceed 0.20 N*m (2 Kgf*cm). (3) Caution for the atmosphere q Dew drop atmosphere should be avoided. w Do not store and/or operate the LCD module in a high temperature and/or high humidity atmosphere. Storage in an electro-conductive polymer packlng pouch and under relatively low temperature atmosphere is recommended. e This module uses cold cathod fluorescent lamp. Therefore, The life time of lamp becomes short conspicuously at low temperature. r Do not operate the LCD module in a high magnetic field. (4) Caution for the module characteristics q Do not apply fixed pattern data signal to the LCD module at product agjng. Applying fixed pattern for a long time may cause image sticking.
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NL6448AC20- 06
(5)Other cautions q Do not disassemble and/or reassemble LCD module. w Do not readjust variable resistor or switch etc. e When returning the module for repair or etc, please pack the module not to be broken. We recommend to the original shipping packages.
Liquid Crystal Dlsplay has the following specific characteristics. There are not defects or malfunctions. The display condition of LCD module may be affected by the ambient temperature. The LCD module uses cold cathode tube for backlightlng. Optical characteristics, like luminance or uniformity, will change during time. Uneven brightness and/or small spots may be noticed depending on different display patterns.
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NL6448AC20-06
OUTLINE DRAWING / FRONT SIDE (Unit in mm)
3.40.3 3.40.3
(3.5) 96.00.3 (14.5) (14.5)
2.50.3
(112)
2.50.3
(6.3)
MOUNTING HOLE
4- 2.90.2
ACTIVE AREA CENTER
(140.5) (BEZEL OPENING)
(132.48) (ACTIVE AREA)
172.00.3 (3.4)
(6.3)
MODULE CENTER
(20.76)
(6.3)
NL6448AC20-06
ES2228421 K100570710033
MADE IN JAPAN
(2.8)
(3.5) (17.3)
(3.5)
(0.68) (4.3) (14.4) (17.3)
98.00.3 (99.36) (ACTIVE AREA) (106.6) (BEZEL OPENING) 126.80.5
11.5(MAX.)
(2.8)
(16.66)
note 1: The value in parentheses are for reference. note 2: The torque to mounting screw should never exceed 0.2 Nm (2 kgf cm)
2.50.3
3.40.3
3.40.3
(6)
2.50.3
178.80.5
(1)
(112)
(6.3)
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NL6448AC20-06
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No part of this document may be copied or reproduced in any form or by any means without the prior written consent of NEC Corporation. NEC Corporation does not assume any liability for infringement of patents, copyrights or other intellectual property rights of third parties by or arising from use of a device described herein or any other liability arising from use of such device. No license, either express, implied or otherwise, is granted under any patents, copyrights or other intellectual property rights of NEC Corporation or of others.

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