REVISIONS
REV. DESCRIPTION DATE APPROVED
The information disclosed herein was originated
by and is the property of Densitron International.
Densitron International reserves all patent,
proprietary, design, use, sales, manufacturing and
reproduction rights thereto.
APPROVALS DATE
DRAWN
CHECKED
ISSUED
Unless otherwise
specified:
Dimensions are mm
Tolerances are:
X = ± 3
.X = ± 0.5
.XX = ± 0.05
FSCM NO. 62483
DENSITRON INTERNATIONAL PLC.
TITLE
SHEET 1 OF
8
DWG. NO. LM3056
128 X 256 GRAPHICS LCD MODULE
-
RELEASED ON ECN #E0750
7/28/98
MA
1. Specification subject to change without notice.
2. All dimensions and specifications apply to standard modules. This information may vary for modules with optional
features.
3. All dimensions are in millimeters.
4. Precautions:These precautions apply equally to modules from all makers, not just Densitron. Violation of these
guidelines may void the warranty and can cause problems ranging from erratic operation to catastrophic display
failure.
Handling precautions:
♦ This device is susceptible to Electro-Static Discharge (ESD) damage. Observe Anti-Static precautions.
Power supply precautions:
♦ Identify and, at all times, observe absolute maximum ratings for both logic and LC drivers. Note that there is some
variance between models.
♦ Prevent the application of reverse polarity to VDD and VSS, however briefly.
♦ Use a clean power source free from transients. Power up conditions are occasionally “jolting” and may exceed the
maximum ratings of the module.
♦ The +5V power of the module should also supply the power to all devices which may access the display. Don’t
allow the data bus to be driven when the logic supply to the module is turned off.
♦ DO NOT install a capacitor between the VO (contrast) pin and ground. VDD must, at all times, exceed the VO
voltage level. The capacitor combines with the contrast potentiometer to form an R-C network which “holds-up” VO,
at power-down, possibly damaging the module.
Operating precautions:
♦ DO NOT plug or unplug the module when the system is powered up.
♦ Minimize the cable length between the module and host MPU. (Recommended max. length 30 cm).
♦ For models with EL or CCFL backlights, do not disable the backlight by interrupting the HV line. Unloaded inverters
produce voltage extremes which may arc within a cable or at the display.
♦ Operate the module within the limits of the modules temperature specifications.
Mechanical / Environmental precautions:
♦ Improper soldering is the major cause of module difficulty. Use of flux cleaner is not recommended as they may
seep under the elastomeric connection and cause display failure. Densitron recommends the use of Kester “245”
no-clean solder.
♦ Mount the module so that it is free from torque and mechanical stress.
♦ Surface of LCD panel should not be touched or scratched. The display front surface is an easily scratched, plastic
polarizer. Avoid contact and clean only when necessary with soft, absorbent cotton dampened with petroleum
benzene.
♦ ALWAYS employ anti-static procedure while handling the module.
♦ Prevent moisture build-up upon the module and observe the environmental constraints for storage temperature and
humidity.
♦ DO NOT store in direct sunlight.
♦ If leakage of the liquid crystal material should occur, avoid contact with this material, particularly ingestion. If the
body or clothing becomes contaminated by the liquid crystal material, wash thoroughly with water and soap.
Notes: (unless otherwise specified)
SHEET OF
DWG. NO. LM3056 REV. -
1.0 DESCRIPTION
Dot matrix display module consisting of liquid crystal display, CMOS driver and.
Available LC fluid type is: NTN (supertwisted nematic), FSTN (film supertwisted nematic).
Other options include EL backlighting, and, grey or yellow mode STN.
2.0 MECHANICAL CHARACTERISTICS
Item Specifications Unit
Package Dimensions 200.0 (W) x 110.0 (H) x 12.0 max (D) mm
Display format 256 dots (W) x 128 dots (H) -
Driving method 1/64 duty
Dot size 0.43 (W) x 0.43 (H) mm
Dot pitch 0.48 (W) x 0.48 (H) mm
Viewing area 128.0 (W) x 66.5 (H) mm
Weight 220.0 g
Notes:W-Width;H-Height;D-Depth.
3.0 ABSOLUTE MAXIMUM RATINGS VSS=0V;Ta=25°C
Item Symbol NTN/ FSTN NTN-H/ FSTN-H UNIT
Min. Max. Min Max.
Logic supply voltage VDD-
VSS 0 7 0 7 V
LC driver supply voltage VDD-VO0 25 0 25 V
Operating temperature
Storage temperature (Note 1) TOP
TST 0
-20 +50
+70 -20
-30 +70 (Note 3)
+80 °C
Humidity: Operating (@40°C)
Non-operating
(@40°C)
-
--
-85%
95% -
-85%
95% RH (Note 2)
RH (Note 2)
Notes: 1: Tested to 100 hrs.
2: Refers to non-condensing conditions.
3. It is not recommended to operate CCF lamp below 0°C.
4.0 ELECTRICAL CHARACTERISTICS VDD=5±0.25V;Ta=25°C
Item Symbol Test Condition Min. Typ. Max. Unit
Input “High” voltage VIH -2.2 -VDD V
Input “Low” voltage VIL -- - 0.8VDD V
Output “High” voltage VOH IOH=0.205mA - - - V
Output “Low” voltage VOL IOL=1.2mA - - - V
Power supply current IEE VEE=-15V -2.3 -mA
Power supply current IDD VDD=5.0V -5.2 -mA
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2
7.0 POWER SUPPLY
V
VV
V
V
V
V
DD
OR
SS
EE
EE
EE
L
C
D
+5VV
VV
V
V
DD
OR
SS
EE
L
C
D+5V
NTN NTNwithon-boardnegative
voltage generator
V
V
V
DD
SS
EE
L
C
D
+5V
NTNwithtemperature
compensation
V
V
DD
SS
L
C
D+5V
NTNwithon-boardnegativevoltage
generatorandtemperaturecompensation
V=10K-20KohmR
SHEET 3 OF 8
DWG. NO. LM3056 REV.-
5.0 RECOMMENDED LC DRIVE VOLTAGE (VDD-VO)VDD=5.0±0.25V
Temperature NTN NTN-H FSTN FSTN-H
Ta= -20°C -24.3 -19.6
Ta= 0°C 21.0 21.0 18.3 18.3
Ta= 25°C 18.5 18.5 17.3 17.3
Ta= 50°C 16.8 16.8 16.0 16.0
Ta= 70°C -15.7 -15.0
6.0 BACKLIGHT SPECIFICATIONS: Ta=20°C,60%RH,Darkroom.
Item Symbol Typ. Max. Unit
EL lamp input voltage VEL 100 150 Vrms
ELinput current IEL 5.0 6.0 mA
Life to half initial brightness -10000 15000 Hours
EL lamp input frequency FEL 25 60 KHz
Recommended backlight inverter -DAS5V100 - -
SHEET OF
DWG. NO. LM3056 REV. -
8.0 INTERFACE DESCRIPTION
Pin No. Symbol I/O Function
1D1 IDisplay data H…Dot on, L… Dot off
2FLM IFirst Line Marker indicates the beginning of each display cycle
3MIControl signal for A.C. drive
4CL1IThe CL1 latches the serial data in the shift registers
5CL2IClock signal for shifting serial data
6D2IDisplay data H…Dot on, L…Dot off
7VDD -Logic Supply Voltage (+5V)
8VSS -Ground (0V)
9Vee -Power supply for LC driving (-12V)
10 Vo -Operating voltage for LC drivers
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4
9.0 BLOCK DIAGRAM:
IC(8)
IC(7)
IC(6)
IC(5)
IC(1)
IC(2)
IC(3)
IC(4)
Item Symbol Min. Typ. Max. Unit
Max Clock Frequency fcp 3.3 - - MHz
Clock Pulse Width tw(CP) 125 - - nS
LOAD Pulse Width tw(L) 125 - - nS
Data Set-up Time tsetup 50 - - nS
CP→LOAD time tCL 250 - - nS
LOAD→CP time tLC 0- - nS
CP Rise/Fall time tr(CP)1 tf(CP) - - 50 nS
LOAD Rise/Fall time tr(L)1 tf(L)) - - 1µs
Data Hold time thold 50 - - ns
Item Symbol Min. Typ. Max. Unit
Max Clock Frequency fcp 3.3 - - MHz
Clock Pulse Width tw(CP) 125 - - nS
LOAD Pulse Width tw(L) 125 - - nS
Data Set-up Time tsetup 50 - - nS
CP→LOAD time tCL 250 - - nS
LOAD→CP time tLC 0- - nS
CP Rise/Fall time tr(CP)1 tf(CP) - - 50 nS
LOAD Rise/Fall time tr(L)1 tf(L)) - - 1µs
Data Hold time thold 50 - - ns
SHEET 5 OF 8
DWG. NO. LM3056 REV. -
10.0 TIMING CHARACTERISTICS
Item Symbol Min. Typ. Max. Unit
Max Clock Frequency fcp 3.3 - - MHz
Clock Pulse Width tw(CP) 125 - - nS
LOAD Pulse Width tw(L) 125 - - nS
Data Set-up Time tsetup 50 - - nS
CP→LOAD time tCL 250 - - nS
LOAD→CP time tLC 0- - nS
CP Rise/Fall time tr(CP)1 tf(CP) - - 50 nS
LOAD Rise/Fall time tr(L)1 tf(L)) - - 1µs
Data Hold time thold 50 - - ns
11.0 VOLTAGE SEQUENCING
Always observe the following power supply ON/OFF sequence. Failure to so may cause latch up of
CMOS LSI circuits or DC induced damage to LC panel.
(CL1)
(D1)
(CL2)
W(L)
SHEET OF
DWG. NO. LM3056 REV. -
12.0 OPTICAL CHARACTERISTICS
Item Symbol Test Condition Min. Typ. Max. Unit
Contrast ratio KØ=20° θ=0° 2.5 - - -
Viewing angle Ø2-Ø1
θθ=0° K>1.4
Ø=20° K=1.4 20
±30 -
--
-Deg.
Deg.
Response time Rise
Fall tr
tfØ=20° θ=0°
Ø=20° θ=0° -
-150
150 250
250 mS
mS
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6
1.4
Ø1 Ø2
NTN, NTN-H: Ø1 < 0° < Ø2
TN, TN-H: Ø1 < 20° < Ø2
Viewing angle
Contrast ratio
Brightness
B2
B1
Driving voltage
Selected dot
Non-selected
dot
XX'
Ø2
Ø1
Y
Y'
Brightness of non-selected dots
Brightness of selected dots
K =
DEFINITION OF CONTRAST RATIO (K) CONTRAST VERSUS VIEWING ANGLE
DEFINITION OF ANGLES Ø AND
100%
90%
10%
tr tf
Brightness
Selected Non-selected
Non-selected
DEFINITION OF OPTICAL RESPONSE
θθ
θθ
SHEET OF
DWG. NO. LM3056 REV. -
14.0 PART NUMBER DESCRIPTION FOR AVAILABLE OPTIONS
LM3056••‚‚256G128ƒƒ„„……
•• POLARIZER TYPE
A = Reflective: light background, non backlit
B = Transflective: light background, backlit
‚‚ NOT APPLICABLE - LEAVE BLANK
ƒƒ FLUID TYPE AND POWER SUPPLY
D = NTN with +5VDC and external negative voltage operation
H = NTN extended temp. with +5VDC and external negative voltage operation
„„ FLUID TYPE
N = NTN
F = FSTN (Film Supertwisted Nematic)
…… COLOR FOR NTN FLUID
G = Gray (reflective and transflective)
y = Yellow background (reflective and transflective)
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