DMC20434U (Optrex)
LCD Module

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LCD Module Specification
Type No. DMC20434U
First Edition
Apr 11, 2000
Final Revision
*******
Approved by
Checked by
Checked by
Prepared by
Production Div.
Quality Assurance Div.
Design Engineering Div.
Production Div.
Table of Contents
1. General Specifications .............................................................................2
2. Electrical Specifications...........................................................................3
3. Optical Specifications ..............................................................................5
4. I/O Terminal.............................................................................................7
5. Test............................................................................................................9
6. Appearance Standards............................................................................10
7. Code System of Production Lot ..........................................................13
8. Type Number..........................................................................................13
9. Applying Precautions .............................................................................13
10. Precautions Relating Product Handling................................................14
11. Warranty..................................................................................................15
Revision History
Rev. Date
Page
Comment
DMC20434U (AP) No.2000-0137
OPTREX CORPORATION
OPTREX
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1.General Specifications
Operating Temp.
min. 0℃ ~ max. 50
Storage Temp.
min. -20℃ ~ max. 70
Display Format
20 characters × 4 lines
Display Fonts
5 × 8 dots ( 1 character )
Viewing Area
76.0 (W) × 25.2 (H) mm
Outline Dimensions 98.5 (W) × 60.0 (H) × 11.0 max. (D) mm
Weight
65g max.
LCD Type
FRD-7141
( TN / Clear / Reflective )
Viewing Angle
12:00
Backlight
None
Drawings
Dimensional Outline UE-30371B
DMC20434U (AP) No.2000-0137
OPTREX CORPORATION
OPTREX
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2.Electrical Specifications
2.1.Absolute Maximum Ratings
Parameter
Supply Voltage
(Logic)
Supply Voltage
(LCD Drive)
Input Voltage
Symbol
VCC-VSS
VCC-VEE
VI
Conditions
Min.
-0.3
Max.
6.5
VSS=0V
Units
V
0 6.5 V
-0.3
VCC+0.3
V
2.2.DC Characteristics
Parameter
Supply Voltage
(Logic)
Supply Voltage
(LCD Drive)
High Level
Input Voltage
Low Level
Input Voltage
High Level
Output Voltage
Low Level
Output Voltage
Supply Current
Symbol
VCC-VSS
VCC-VEE
VIH
VIL
VOH
VOL
ICC
Conditions
VCC=5.0V±10%
VCC=5.0V±10%
IOH=-0.205mA
IOL=1.2mA
VCC-VSS=5.0V
Min. Typ.
4.5
Shown in 3.1
2.2
-0.3
2.4
--
2.0
Ta=25, VSS=0V
Max.
Units
5.5 V
V
VCC
V
0.6 V
V
0.4 V
3.0 mA
DMC20434U (AP) No.2000-0137
OPTREX CORPORATION
OPTREX
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2.3.AC Characteristics
Parameter
Enable Cycle Time
Enable Pulse Width
Enable Rise/Fall Time
Address Setup Time
Address Hold Time
Write Data Setup Time
Write Data Hold Time
Read Data Delay Time
Read Data Hold Time
RS
R/W
E
DB0DB7
RS
R/W
E
DB0DB7
Symbol
tCYC
PWEH
tEr, tEf
tAS
tAH
tDSW
tDHW
tDDR
tDHR
Conditions
Fig.1, 2
Fig.1, 2
Fig.1, 2
Fig.1, 2
Fig.1, 2
Fig.1
Fig.1
Fig.2
Fig.2
Min.
500
230
40
10
80
10
5
VIH
VIL
tAS
VIH
VIL
tAH
VCC=5.0V±10%
Max.
Units
ns
ns
20 ns
ns
ns
ns
ns
160 ns
ns
VIL
tEr
VIL
PWEH
VIH VIH
tDSW
VIL
tEf
VIL
tDHW
VIL
VIH VIH
Valid Data
VIL VIL
tCYC
Fig.1 Write Operation Timing
VIH
VIL
tAS
VIH
VIL
tAH
VIH VIH
PWEH
tEr tEf
VIH
VIL
VIH
VIL
tDDR
tDHR
VIL
VOH
VOH
Valid Data
VOL
VOL
tCYC
Fig.2 Read Operation Timing
DMC20434U (AP) No.2000-0137
OPTREX CORPORATION
OPTREX
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3.Optical Specifications
3.1.LCD Driving Voltage
Parameter
Symbol
Conditions
Min. Typ. Max. Units
Recommended
Ta= 0
- - 5.2 V
LCD Driving Voltage
VCC-VEE
Ta=25
4.2 4.5 4.8
V
Note 1
Ta=50
3.7 - - V
Note 1 : Voltage (Applied actual waveform to LCD Module) for the best contrast. The range of
minimum and maximum shows tolerance of the operating voltage. The specified contrast ratio and
response time are not guaranteed over the entire range.
3.2.Optical Characteristics
Ta=25, 1/16 Duty, 1/5 Bias, VD=4.5V (Note 4), θ=10 , φ=90
Parameter
Symbol
Conditions
Min. Typ. Max. Units
Contrast Ratio
Note 1
CR
θ=20 , φ=90
7
Viewing Angle
Shown in 3.3
Response Rise Note 2
TON
- - 130 200 ms
Time Decay Note 3
TOFF
- - 130 200 ms
Note 1 : Contrast ratio is definded as follows.
CR = LOFF / LON CR = LON / LOFF
LON : Luminance of the ON segments
LOFF : Luminance of the OFF segments
Note 2 : The time that the luminance level reaches 90% of the saturation level from 0% when ON
signal is applied.
Note 3 : The time that the luminance level reaches 10% of the saturation level from 100% when OFF
signal is applied.
Note 4 : Definition of Driving Voltage VD
Assuming that the typical driving waveforms shown below are applied to the LCD Panel at
1/A Duty - 1/B Bias ( A : Duty Number, B : Bias Number ). Driving voltage VD is definded
as follows.
VD = (Vth1+Vth2) / 2
Vth1 : The voltage VO-P that should provide 50% of the saturation level in the luminance
measured atθ= 10 , φ=90 on the segment which the ON signal is applied to.
Vth2 : The voltage VO-P that should provide 26% of the saturation level in the luminance
measured atθ= 40 , φ=90 on the segment which the OFF signal is applied to.
VO-P
1 / ( fF×A )
ON SIGNAL
DMC20434U (AP) No.2000-0137
1 / fF
( B-2 )×VO-P / B
OFF SIGNAL
OPTREX CORPORATION
OPTREX
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3.3.Definition of Viewing Angle and Optimum Viewing Area
Point shows the point where contrast ratio is measured. : θ= 20 , φ=90
Driving condition : 1/16 Duty, 1/5 Bias, VD=4.5V, fF=80Hz
90
135
45
180
225
φ
10 20 30 40 50
θ
(φ= 0 ゚)
180
θ
270
315
270
Area
shows typ. CR2
90
φ
0
3.4.System Block Diagram
Photometer
#1980A WB
Temperature Chamber
Rotation Table (θ,φ)
φ LCD
Optical Fiber
θ
Computer
Control Unit &
Waveform Generator
Halogen bulb
DMC20434U (AP) No.2000-0137
OPTREX CORPORATION
OPTREX
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4.I/O Terminal
4.1.Pin Assignment
No. Symbol
1 VSS
2 VCC
3 VEE
4 RS
5 R/W
6E
7 DB0
8 DB1
9 DB2
10 DB3
11 DB4
12 DB5
13 DB6
14 DB7
Level
H/L
H/L
H/L
H/L
H/L
H/L
H/L
H/L
H/L
H/L
H/L
Function
Power Supply (0V, GND)
Power Supply for Logic
Power Supply for LCD Drive
Register Select Signal
Read/Write Select Signal H : Read L : Write
Enable Signal (No pull-up Resister)
Data Bus Line / Non-connection at 4-bit operation
Data Bus Line / Non-connection at 4-bit operation
Data Bus Line / Non-connection at 4-bit operation
Data Bus Line / Non-connection at 4-bit operation
Data Bus Line
Data Bus Line
Data Bus Line
Data Bus Line
4.2.Example of Power Supply
It is recommended to apply a potentiometer for the contrast adjust due to the tolerance
of the driving voltage and its temperature dependence.
VCC
MODULE VSS
VR
VCC (+Voltage)
VSS (0V)
VEE
VR=1020K Ω
DMC20434U (AP) No.2000-0137
OPTREX CORPORATION
OPTREX
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4.3.Block Diagram
DB7 8
DB0
E
R/W
RS
COM 16
LCDP
20 characters × 4 lines
Control LSI
HD44780
or equivalent
SEG 40
SEG 160
4 Column Driver
MSM5259 × 4
or equivalent
VCC
VSS
VEE
Bias Circuit
To LSI
DMC20434U (AP) No.2000-0137
OPTREX CORPORATION
OPTREX
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5 . Te s t
No change on display and in operation under the following test condition.
No. Parameter
1 High Temperature Operating
2 Low Temperature Operating
3 High Temperature Storage
4 Low Temperature Storage
5 Damp Proof Test
6 Vibration Test
7 Shock Test
Conditions
50℃±2, 96hrs (operation state)
0℃±2, 96hrs (operation state)
70℃±2, 96hrs
-20℃±2, 96hrs
40℃±2, 9095%RH, 96hrs
Total fixed amplitude : 1.5mm
Vibration Frequency : 1055Hz
One cycle 60 seconds to 3 directions of X, Y, Z for
each 15 minutes
To be measured after dropping from 60cm high on
the concrete surface in packing state.
Notes
3
4
3, 4
3, 4
5
E
B
Dropping method corner dropping
F A corner : once
GD C
Edge dropping
B,C,D edge : once
A
60cm
Face dropping
E,F,G face : once
Concrete Surface
Note 1 : Unless otherwise specified, tests will be conducted under the following condition.
Temperature : 20±5
Humidity : 65±5%
Note 2 : Unless otherwise specified, tests will be not conducted under functioning state.
Note 3 : No dew condensation to be observed.
Note 4 : The function test shall be conducted after 4 hours storage at the normal temperature and humidity
after removed from the test chamber.
Note 5 : Vibration test will be conducted to the product itself without putting it in a container.
DMC20434U (AP) No.2000-0137
OPTREX CORPORATION
OPTREX
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6.Appearance Standards
6.1.Inspection conditions
The LCD shall be inspected under 40W white fluorescent light.
The distance between the eyes and the sample shall be more than 30cm.
All directions for inspecting the sample should be within 45 against perpendicular line.
45
6.2.Definition of applicable Zones
A Zone
B Zone
C Zone
Bezel Flame
A Zone : Active display area
B Zone : Area from outside of "A Zone" to validity viewing area
C Zone : Rest parts
A Zone + B Zone = Validity viewing area
DMC20434U (AP) No.2000-0137
OPTREX CORPORATION
OPTREX
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6.3.Standards
No. Parameter
Criteria
1 Black and
(1) Round Shape
White Spots,
Zone
Acceptable Number
Foreign Substances
Dimension (mm)
ABC
D 0.1
*
*
*
0.1 D 0.2
5
5
*
0.2 D 0.3
0
1
*
0.3 D
00*
D = ( Long + Short ) / 2 * : Disregard
(2) Line Shape
Zone
Acceptable Number
X(mm) Y(mm)
ABC
2.0L
1.0L
1.0L
0.02W
0.03W
0.04W
0.05W
0.05W
***
33*
12*
02*
In the same way (1)
X : Length Y : Width * : Disregard
Total defects shall not exceed 5.
2 Air Bubbles
(between glass
Zone
Acceptable Number
& polarizer)
Dimension (mm)
ABC
D 0.15
*
*
*
0.15D 0.3 2 3 *
0.3 D 0.5 1 2 *
0.5 D 1.0 0 1 *
* : Disregard
Total defects shall not exceed 3.
DMC20434U (AP) No.2000-0137
OPTREX CORPORATION
OPTREX
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No. Parameter
3 The Shape of Dot
(1) Dot Shape (with Dent)
0.15
Criteria
As per the sketch of left hand.
(2) Dot Shape (with Projection)
Should not be connected to next dot.
(3) Pin Hole
X
(X+Y) / 20.2mm
Y
(Less than 0.1mm is no counted.)
Total defects shall not exceed 5.
4 Polarizer Scratches Not to be conspicuous defects.
5 Polarizer Dirts
If the stains are removed easily from LCDP surface, the module is not
defective.
6 Color Variation
Not to be conspicuous defects.
DMC20434U (AP) No.2000-0137
OPTREX CORPORATION
OPTREX
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7.Code System of Production Lot
The production lot of module is specified as follows.
□□□□□□
Factory Number (Numeral)
Factory Code (Alphabet)
Production Week (15)
Production Month (19, X, Y, Z)
Production Year (Lower 2 digits)
8.Type Number
The type number of module is specified on the back of module as follows.
DMC20434 U
Stamp
Etching or Printing
9.Applying Precautions
Please contact us when questions and/or new problems not specified in this specifications arise.
DMC20434U (AP) No.2000-0137
OPTREX CORPORATION
OPTREX
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10.Precautions Relating Product Handling
The Following precautions will guide you in handling our product correctly.
1) Liquid crystal display devices
The liquid crystal display device panel used in the liquid crystal display module is made of plate
glass. Avoid any strong mechanical shock. Should the glass break handle it with care.
The polarizer adhering to the surface of the LCD is made of a soft material.
Guard against scratching it.
2) Care of the liquid crystal display module against static electricity discharge.
When working with the module, be sure to ground your body and any electrical equipment you may
be using. We strongly recommend the use of anti static mats ( made of rubber ), to protect work
tables against the hazards of electrical shock.
Avoid the use of work clothing made of synthetic fibers. We recommend cotton clothing or other
conductivity-treated fibers.
Slowly and carefully remove the protective film from the LCD module, since this operation can
generate static electricity.
3) When the LCD module alone must be stored for long periods of time:
Protect the modules from high temperature and humidity.
Keep the modules out of direct sunlight or direct exposure to ultraviolet rays.
Protect the modules from excessive external forces.
4) Use the module with a power supply that is equipped with an overcurrent protector circuit,
since the module is not provided with this protective feature.
5) Do not ingest the LCD fluid itself should it leak out of a damaged LCD module. Should hands
or clothing come in contact with LCD fluid, wash immediately with soap.
6) Conduc1tivity is not guaranteed for models that use metal holders where solder connections
between the metal holder and the PCB are not used. Please contact us to discuss appropriate
ways to assure conductivity.
7) For models which use CFL:
High voltage of 1000V or greater is applied to the CFL cable connector area.
Care should be taken not to touch connection areas to avoid burns.
Protect CFL cables from rubbing against the unit and thus causing the wire jacket to become worn.
The use of CFLs for extended periods of time at low temperatures will significantly shorten their
service life.
DMC20434U (AP) No.2000-0137
OPTREX CORPORATION
OPTREX
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8) For models which use touch panels:
Do not stack up modules since they can be damaged by components on neighboring modules.
Do not place heavy objects on top of the product. This could cause glass breakage.
9) For models which use COG,TAB,or COF:
The mechanical strength of the product is low since the IC chip faces out unprotected from the rear.
Be sure to protect the rear of the IC chip from external forces.
Given the fact that the rear of the IC chip is left exposed, in order to protect the unit from electrical
damage, avoid installation configurations in which the rear of the IC chip runs the risk of making
any electrical contact.
10) Models which use flexible cable, heat seal, or TAB:
In order to maintain reliability, do not touch or hold by the connector area.
Avoid any bending, pulling, or other excessive force, which can result in broken connections.
11.Warranty
This product has been manufactured to your company’s specifications as a part for use in your company’s
general electronic products. It is guaranteed to perform according to delivery specifications. For any other
use apart from general electronic equipment, we cannot take responsibility if the product is used in medical
devices, nuclear power control equipment, aerospace equipment, fire and security systems, or any other
applications in which there is a direct risk to human life and where extremely high levels of reliability are
required. If the product is to be used in any of the above applications, we will need to enter into a separate
product liability agreement.
We cannot accept responsibility for any defect, which may arise from additional manufacturing of
the product (including disassembly and reassembly), after product delivery.
We cannot accept responsibility for any defect, which may arise after the application of strong
external force to the product.
We cannot accept responsibility for any defect, which may arise due to the application of static
electricity after the product has passed your company’s acceptance inspection procedures.
When the product is in CFL models, CFL service life and brightness will vary according to the
performance of the inverter used, leaks, etc. We cannot accept responsibility for product
performance, reliability, or defect, which may arise.
We cannot accept responsibility for intellectual property of a third party, which may arise through the
application of our product to your assembly with exception to those issues relating directly to the
structure or method of manufacturing of our product.
Optrex will not be held responsible for any quality guarantee issue for defect products judged as
Optrex-origin longer than 2 (two) years from Optrex production or 1(one) year from Optrex, Optrex
America, Optrex Europe, Display LC delivery which ever comes later.
DMC20434U (AP) No.2000-0137
OPTREX CORPORATION
OPTREX
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