DMC-20481NY-LY-BAE-BKN - Optrex

DMC20481NY-LY-BAE-BKN (BK) No.2005-0054 OPTREX CORPORATION Page 1/16

LCD Module Technical Specification

DMC20481NY-LY-BAE-BKN

Table of Contents

1. General Specifications...............................................................................................................................2

2. Electrical Specifications............................................................................................................................3

3. Optical Specifications ................................................................................................................................6

4. I/O Terminal...................................................................................................................................................8

5. Test.................................................................................................................................................................10

6. Appearance Standards.............................................................................................................................11

7. Code System of Production Lot.........................................................................................................14

8. Type Number...............................................................................................................................................14

9. Applying Precautions ...............................................................................................................................14

10. Precautions Relating Product Handling............................................................................................15

11. Warranty.......................................................................................................................................................16

Revision History

Rev. Date Page Comment

Type No.

Sep 6, 2005

First Edition

Final Revision

******

Checked by (ACI Engineering Division)

)

Approved by (Quality Assurance Division)

)

Prepared by (ACI Engineering Division)

T.Yuchi

DMC20481NY-LY-BAE-BKN (BK) No.2005-0054 OPTREX CORPORATION Page 2/16

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) × 61.0 (H) × 15.6 max. (D) mm

Weight ：70g max.

LCD Type ：NTD-7141

( STN / Yellow-mode / Transmissive )

Viewing Angle ：6:00

Backlight ：LED Backlight / Yellow-green

Drawings ：Dimensional Outline DMC20481 BJ series

RoHS regulation :To our best knowledge, this product satisfies material

requirement of RoHS regulation.

Our company is doing the best efforts to obtain

the equivalent certificate from our suppliers.

DMC20481NY-LY-BAE-BKN (BK) No.2005-0054 OPTREX CORPORATION Page 3/16

2. Electrical Specifications

2.1. Absolute Maximum Ratings VSS=0V

Parameter Symbol Conditions Min. Max. Units

Supply Voltage

(Logic)

VDD-VSS −-0.3 7.0 V

Supply Voltage

(LCD Drive)

VDD-VEE −013.0 V

Input Voltage VI−-0.3 VDD+0.3 V

2.2. DC Characteristics Ta=25℃, VSS=0V

Parameter Symbol Conditions Min. Typ. Max. Units

Supply Voltage

(Logic)

VDD-VSS −4.5 −5.5 V

Supply Voltage

(LCD Drive)

VDD-VEE Shown in 3.1 V

High Level

Input Voltage

VIH VDD=5.0V±10% 2.2 −VDD V

Low Level

Input Voltage

VIL VDD=5.0V±10% -0.3 −0.6 V

High Level

Output Voltage

VOH IOH=-0.205mA 2.4 − − V

Low Level

Output Voltage

VOL IOL=1.2mA − − 0.4 V

Supply Current IDD VDD-VSS=5.0V −2.2 3.5 mA

DMC20481NY-LY-BAE-BKN (BK) No.2005-0054 OPTREX CORPORATION Page 4/16

2.3. AC Characteristics VDD=5.0V±10%

Parameter Symbol Conditions Min. Max. Units

Enable Cycle Time tCYC Fig.1, 2 500 −ns

Enable Pulse Width PWEH Fig.1, 2 230 −ns

Enable Rise/Fall Time tEr, tEfFig.1, 2 −20 ns

Address Setup Time tAS Fig.1, 2 40 −ns

Address Hold Time tAH Fig.1, 2 10 −ns

Write Data Setup Time tDSW Fig.1 80 −ns

Write Data Hold Time tDHW Fig.1 10 −ns

Read Data Delay Time tDDR Fig.2 −160 ns

Read Data Hold Time tDHR Fig.2 5−ns

Fig.1 Write Operation Timing

Fig.2 Read Operation Timing

R/W

VIH

VIL

PWEH

VIL

CYC

DSW

DHW

VIL

DB0

〜

DB7

Valid Data

VIH

VIL

VIH

VIL

VIH VILVIL

VIH

VIL

VIH

VIL

R/W

VIHVIH

VIH

PWEH

DDR

CYC

DHR

VIL

DB0

〜

DB7

Valid Data

VIH

VIL

VIH

VIL

VIH VILVIL

VOH

VOL

VOH

VOL

DMC20481NY-LY-BAE-BKN (BK) No.2005-0054 OPTREX CORPORATION Page 5/16

2.4. Lighting Specifications

2.4.1. Absolute Maximum Ratings Ta=25℃

Parameter Symbol Conditions Min. Typ. Max. Units

Foward Current IFNote 1 − − 480 mA

Reverse Voltage VR− − − 8V

LED Power Dissipation PD− − − 2.0 W

Note 1 : Refer to the foward current derating curve.

2.4.2. Operating Characteristics Ta=25℃

Parameter Symbol Conditions Min. Typ. Max. Units

Foward Voltage VFIF=240mA 3.8 4.0 4.2 V

Luminance of

Backlight Surface

LIF=240mA 60 − − cd/㎡

50250

Ta (

℃

)

280

480

IF (mA)

DMC20481NY-LY-BAE-BKN (BK) No.2005-0054 OPTREX CORPORATION Page 6/16

3. Optical Specifications

3.1. LCD Driving Voltage

Parameter Symbol Conditions Min. Typ. Max. Units

Recommended Ta= 0℃ − − 5.1 V

LCD Driving Voltage VDD-VEE Ta=25℃4.3 4.6 4.9 V

Note 1 Ta=50℃4.0 − − 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, 1/4.5 Bias, VD=4.6V (Note 4), θ= 0ﾟ, φ=−ﾟ

Parameter Symbol Conditions Min. Typ. Max. Units

Contrast Ratio Note 1 CR θ= 0ﾟ, φ=−ﾟ−12 −

Viewing Angle Shown in 3.3

Response Rise Note 2 TON − − 130 200 ms

Time Decay Note 3 TOFF − − 180 280 ms

Note 1 :Contrast ratio is definded as follows.

CR = LOFF / LON

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

at the segment which the ON signal is applied to.

Vth2 : The voltage VO-P that should provide 50% of the saturation level in the luminance

at the segment which the OFF signal is applied to.

O-P

1 /

( B-2 )

O-P

/ B

1 / (

A )

〈

OFF SIGNAL

〉〈ON SIGNAL〉

DMC20481NY-LY-BAE-BKN (BK) No.2005-0054 OPTREX CORPORATION Page 7/16

3.3. Definition of Viewing Angle and Optimum Viewing Area

･Point ● shows the point where contrast ratio is measured. : θ= 0ﾟ, φ=−ﾟ

･Driving condition : 1/16 Duty, 1/4.5 Bias, VD=4.6V, fF=84.4Hz

･Area shows typ. CR≧2

3.4. System Block Diagram

270ﾟ

ﾟ

90 ﾟ

180 ﾟ

270ﾟ

135 ﾟ

315ﾟ225ﾟ

45ﾟ

180 ﾟ

90 ﾟ

(φ= 0 ﾟ）

Halogen bulb

Computer

Rotation Table (

)

Temperature Chamber

LCD

Optical Fiber

Waveform Generator

Control Unit &

#1980A WB

Photometer

DMC20481NY-LY-BAE-BKN (BK) No.2005-0054 OPTREX CORPORATION Page 8/16

4. I/O Terminal

4.1. Pin Assignment

CN1

No. Symbol Level Function

1VSS −Power Supply (0V, GND)

2VDD −Power Supply for Logic

3VEE −Power Supply for LCD Drive

4RS H / L Register Select Signal

5R/W H / L Read/Write Select Signal H : Read L : Write

6EH / L Enable Signal (No pull-up Resister)

7DB0 H / L Data Bus Line / Non-connection at 4-bit operation

8DB1 H / L Data Bus Line / Non-connection at 4-bit operation

9DB2 H / L Data Bus Line / Non-connection at 4-bit operation

10 DB3 H / L Data Bus Line / Non-connection at 4-bit operation

11 DB4 H / L Data Bus Line

12 DB5 H / L Data Bus Line

13 DB6 H / L Data Bus Line

14 DB7 H / L Data Bus Line

15 LED : ANODE −LED Anode Terminal

16 LED : CATHODE −LED Cathode Terminal

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.

MODULE

VDD

VEE

VSS

DD (+Voltage)

VR=10〜20KΩ

VSS (0V)

DMC20481NY-LY-BAE-BKN (BK) No.2005-0054 OPTREX CORPORATION Page 9/16

4.3. Block Diagram

〜

R/W

Control LSI

or equivalent

HCD44780

L C D P

20 characters × 4 lines

Column Driver

LED Backlight

or equivalent

KS0063B × 2

DB7

DB0

SEG 40 SEG 160

COM 16

LED : CATHODE

LED : ANODE

VEE

VSS

VDD

To LSIBias Circuit

DMC20481NY-LY-BAE-BKN (BK) No.2005-0054 OPTREX CORPORATION Page 10/16

5. Test

No change on display and in operation under the following test condition.

No. Parameter Conditions Notes

1High Temperature Operating 50℃±2℃, 96hrs (operation state)

2Low Temperature Operating 0℃±2℃, 96hrs (operation state) 3

3High Temperature Storage 70℃±2℃, 96hrs 4

4Low Temperature Storage -20℃±2℃, 96hrs 3, 4

5Damp Proof Test 40℃±2℃, 90〜95%RH, 96hrs 3, 4

6Vibration Test Total fixed amplitude : 1.5mm 5

Vibration Frequency : 10〜55Hz

One cycle 60 seconds to 3 directions of X, Y, Z for

each 15 minutes

7Shock Test To be measured after dropping from 60cm high on

the concrete surface in packing state.

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.

60cm

Concrete Surface

Dropping method corner dropping

E,F,G face : once

B,C,D edge : once

A corner : once

Face dropping

Edge dropping

DMC20481NY-LY-BAE-BKN (BK) No.2005-0054 OPTREX CORPORATION Page 11/16

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 ﾟagainst perpendicular line.

6.2. Definition of applicable Zones

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

A Zone

B Zone

C Zone

Bezel Flame

ﾟ

DMC20481NY-LY-BAE-BKN (BK) No.2005-0054 OPTREX CORPORATION Page 12/16

6.3. Standards

No. Parameter Criteria

1Black and (1) Round Shape

White Spots, Zone Acceptable Number

Foreign Substances Dimension (mm) A B C

D ≦ 0.1 * * *

0.1 ＜ D ≦ 0.2 55*

0.2 ＜ D ≦ 0.3 01*

0.3 ＜ D 00*

D = ( Long + Short ) / 2 * : Disregard

(2) Line Shape

Zone Acceptable Number

X(mm) Y(mm) A B C

−0.02≧W* * *

2.0≧L0.03≧W33*

1.0≧L0.04≧W12*

1.0≧L0.05≧W02*

−0.05＜WIn the same way (1)

X : Length Y : Width * : Disregard

Total defects shall not exceed 5.

2Air Bubbles

(between glass Zone Acceptable Number

& polarizer) Dimension (mm) A B C

D ≦0.15 * * *

0.15＜ D ≦0.3 23*

0.3 ＜ D ≦0.5 12*

0.5 ＜ D ≦1.0 01*

* : Disregard

Total defects shall not exceed 3.

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No. Parameter Criteria

3The Shape of Dot (1) Dot Shape (with Dent)

As per the sketch of left hand.

(2) Dot Shape (with Projection)

Should not be connected to next dot.

(3) Pin Hole

(X+Y) / 2≦0.2mm

(Less than 0.1mm is no counted.)

Total defects shall not exceed 5.

4Polarizer Scratches Not to be conspicuous defects.

5Polarizer Dirts If the stains are removed easily from LCDP surface, the module is not

defective.

6Color Variation Not to be conspicuous defects.

0.15

≧

DMC20481NY-LY-BAE-BKN (BK) No.2005-0054 OPTREX CORPORATION Page 14/16

7. Code System of Production Lot

The production lot of module is specified as follows.

Factory Control Number (0~99)

Date of the week (A~G)

Factory Number (0~9)

Factory Code (Alphabet)

Production Week (1~5)

Production Month (1~9, X, Y, Z)

Production Year (Lower 2 digits)

8. Type Number

The type number of module is specified as follows.

DMC20481NY-LY-BAE-BKN

9. Applying Precautions

Please contact us when questions and/or new problems not specified in this

Specifications arise.

DMC20481NY-LY-BAE-BKN (BK) No.2005-0054 OPTREX CORPORATION Page 15/16

10. Precautions Relating Product Handling

The Following precautions will guide you in handling our product correctly.

1) Liquid crystal display devices

1. 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.

2. 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.

1. 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.

2. Avoid the use of work clothing made of synthetic fibers. We recommend cotton

clothing or other conductivity-treated fibers.

3. 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:

1. Protect the modules from high temperature and humidity.

2. Keep the modules out of direct sunlight or direct exposure to ultraviolet rays.

3. 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) Conductivity 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:

1. 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.

2. Protect CFL cables from rubbing against the unit and thus causing the wire jacket to

become worn.

3. The use of CFLs for extended periods of time at low temperatures will significantly

shorten their service life.

8) For models which use touch panels:

1. Do not stack up modules since they can be damaged by components on neighboring

modules.

2. Do not place heavy objects on top of the product. This could cause glass breakage.

9) For models which use COG,TAB,or COF:

1. 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.

2. 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.

DMC20481NY-LY-BAE-BKN (BK) No.2005-0054 OPTREX CORPORATION Page 16/16

10) Models which use flexible cable, heat seal, or TAB:

1. In order to maintain reliability, do not touch or hold by the connector area.

2. Avoid any bending, pulling, or other excessive force, which can result in broken

connections.

11) In case of buffer material such as cushion / gasket is assembled into LCD module,

it may have an adverse effect on connecting parts ( LCD panel-TCP / HEAT SEAL / FPC /

etc., PCB-TCP / HEAT SEAL / FPC etc., TCP-HEAT SEAL, TCP-FPC, HEAT SEAL-FPC,

etc.,) depending on its materials.

Please check and evaluate these materials carefully before use.

12) In case of acrylic plate is attached to front side of LCD panel, cloudiness ( very small

cracks ) can occur on acrylic plate, being influenced by some components generated

from polarizer film..

Please check and evaluate those acrylic materials carefully before use.

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.

1. We cannot accept responsibility for any defect, which may arise from additional

manufacturing of the product (including disassembly and reassembly), after

product delivery.

2. We cannot accept responsibility for any defect, which may arise after the application

of strong external force to the product.

3. 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.

4. 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.

5. 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.

6. 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 delivery which ever comes later.