*mydirectindustry

Catalogs
Displaytech
128240D-Series

128240D-Series

Product catalog summary

General Specification
The 128240D Series LCD Module features a 240 x 128 dot display with a dot size of 0.325 x 0.325 mm. The view area is 92.0 mm x 53.0 mm, and the module size is 98.7 mm x 67.7 mm x 9.5 mm. It uses an FSTN LCD type with a transflective polarizer and a viewing angle of 6/12 o'clock. The backlight is LED with an external power driver and white color. The controller and LCD driver is the ST7529-G, operating on a 1/144 duty and 1/12 bias driving method.

Absolute Maximum Ratings
At 25°C and VSS=0V, the power supply for logic ranges from -0.5 to 4.0 V, and for LCD from -0.5 to 20.0 V. The input voltage is between -0.5 and VDD+0.5 V. The LED backlight supply voltage is 3.2 V. Operating temperatures range from 0 to 50°C, with storage temperatures from -10 to 60°C. Wide operating temperatures range from -20 to 70°C, and wide storage temperatures from -30 to 80°C.

Electrical Characteristics
At 25°C with VDD=3.0V±5%, the power supply for LCM is between 2.85 and 3.15 V. Input voltage levels are VIL (low) at Vss to 0.3VDD and VIH (high) at 0.7VDD to VDD. The LCD module driving voltage is typically 15.5 V at 25°C. The supply current for LCM is 2.0 mA, and for LED backlight, it is 120 mA.

Electro-Optical Characteristics
The recommended operating voltage (VLCD) is between 14 and 15 V at 25°C. Response times are 240 ms for Tr and 200 ms for Tf at 25°C. Viewing angles are specified at various degrees, with a current consumption of 16 µA at 25°C.

Backlight Specification
The backlight has dimensions of 98.70 x 67.70 x 9.50 mm, with a viewing area of 92.00 x 53.00 mm. It uses 6 SMT LEDs with a forward voltage of 3.2 V and a forward current of 120 mA. Maximum ratings include a forward current of 180 mA and a reverse voltage of 5 V, with operating temperatures from -20°C to 70°C.

Quality Guarantee
The inspection standard includes functional tests, appearance inspections, and packing specifications. The sampling method follows MIL-STD-105D with major defects at 0.65% and minor defects at 2.5%.

Precautions for Using LCD Modules
Handling precautions include avoiding ESD damage, mechanical shock, and excessive force on the display surface. Power supply precautions emphasize observing maximum ratings and preventing reverse polarity. Operating precautions advise against plugging or unplugging the module while powered.

Electrical Precautions

Unplug the module when the system is powered up.
Minimize cable length between the module and host MPU.
For models with EL backlights, avoid disabling the backlight by interrupting the HV line to prevent voltage extremes.
Operate within the module's temperature specifications.

Mechanical/Environmental Precautions

Avoid improper soldering; flux cleaners can cause display failure.
Mount the module to avoid torque and mechanical stress.
Do not touch or scratch the LCD panel surface.
Use anti-static procedures when handling the module.
Prevent moisture build-up and adhere to storage temperature and humidity constraints.
Avoid direct sunlight exposure.
If liquid crystal material leaks, avoid contact and wash thoroughly if contaminated.

Storage Precautions

Avoid exposure to direct sunlight or fluorescent lamps.
Store in conditions similar to shipping conditions, avoiding extreme temperatures.

Handling LCD Modules

Maintain specified temperature ranges to prevent polarization degradation.
Avoid contact with hard objects and use recommended cleaning agents.
Prevent condensation and avoid touching the display with bare hands.
Handle glass carefully to avoid chipping or breaking.

Installing LCD Modules

Ensure proper spacing to avoid stress on the module surface.

Electro-Static Discharge Control

Ground yourself when handling the module.
Ensure the module and your body have the same electric potential before handling.
Use grounded tools to minimize electromagnetic interference.

Soldering Precautions

Follow specified temperature and time guidelines for soldering.
Protect the LCD surface during soldering to prevent damage.

Operational Precautions

Adjust liquid crystal driving voltage for optimal viewing angle.
Avoid exceeding voltage limits to prevent shortening the LCD's life.
Be cautious of condensation on terminals.

Storage

Store in sealed polyethylene bags in a dark place.
Avoid extreme temperatures and ensure the polarizer surface does not contact other objects.

Safety

Dispose of damaged LCDs by crushing and washing with solvents.
Wash thoroughly if liquid crystal material contacts skin.

Limited Warranty

DISPLAYTECH offers a one-year warranty for functionally defective modules.
Cosmetic defects must be reported within 90 days of shipment.

Return Policy

Warranty is void if precautions are disregarded, such as broken glass or modified circuits.
Modules must be returned with a description of failures or defects.

Revision Record

Version 1.0: Initial revision on 29 July 2008.
Version 1.1: Added remark on 2 October 2008.
Version 1.2: Corrected VLCD voltage on 12 December 2011.

Catalog excerpts

Website: www.displaytech.com.hk Product: 128240D Series LCD Module (240 x 128 DOTS)

Open the catalog to page 1

Displaytech Ltd LCD MODULE 128240D SERIES Version : 1.2 P 2 of 21 ■ ABSOLUTE MAXIMUM RATINGS ■ PRECAUTIONS FOR USING LCD MODULES Contents in this document are subject to change without notice. No part of this document may be reproduced or transmitted in any form or by any means, electronic or mechanical, for any purpose, without the express written permission of Displaytech Ltd.

Open the catalog to page 2

Displaytech Ltd LCD MODULE 128240D SERIES Version : 1.2 P 3 of 21 • When the loading of LCD panel is heavier, the performance of booster will not be in a good working condition. The user may set the BOOSTER EFFICIENCY level to be higher and only a little bit more current needed.

Open the catalog to page 3

Displaytech Ltd LCD MODULE 128240D SERIES Version : 1.2 P 4 of 21 Displaytech Ltd LCD MODULE 128240D SERIES Version : 1.2 P 4 of 21 NOTE 1: DEFINITION OF VIEWING ANGLE AND DIRECTION NOTE 2: THERSHOLD VOLTAGE AND SATURATION VOLTAGE Vth: The voltage Vop which the transmission rate of segment is 90%(positive) or 10%(negative) of saturated value on conditions of the selected waveform. (non-selected waveform is opposition) Vsat: The voltage Vop which the transmission rate of segment is 10%(positive) or 10%(negative) of saturated value on conditions of the selected waveform. (non-selected waveform...

Open the catalog to page 4

Displaytech Ltd LCD MODULE 128240D SERIES Version : 1.2 P 5 of 21 NOTE 3: CURRENT CONSUMPTION (I LCD) Displaytech Ltd LCD MODULE 128240D SERIES Version : 1.2 P 5 of 21 Conditions:l.Driving waveform: static waveform. 2.Voltage applied to all segments NOTE 4: RESPONSE TIME (Tr, Tf) NOTE 5: CONTRAST RATIO (CR) Measuring Methode Of Capacitance Voltage applied to all segments.

Open the catalog to page 5

Displaytech Ltd LCD MODULE 128240D SERIES Version : 1.2 P 6 of 21

Open the catalog to page 6

Displaytech Ltd LCD MODULE 128240D SERIES Version : 1.2 P 7 of 21

Open the catalog to page 7

Displaytech Ltd LCD MODULE 128240D SERIES Version : 1.2 P 8 of 21

Open the catalog to page 8

Displaytech Ltd LCD MODULE 128240D SERIES Version : 1.2 P 9 of 21

Open the catalog to page 9

Displaytech Ltd LCD MODULE 128240D SERIES Version : 1.2 P 10 of 21

Open the catalog to page 10

Displaytech Ltd LCD MODULE 128240D SERIES Version : 1.2 P 11 of 21 ♦ ABSOLUTE MAXIMUM RATING TESTING POINTS CIRCUIT DIAGRAM 1. AVERAGE LUMINOUS INTENSITY IS THE AVERAGE VALUE OF THE NINE INDICATED POINTS AS SHOWN. 2. MEASUREMENT INSTRUMENT: BM-7, APERTURE: ' 10mm.

Open the catalog to page 11

Displaytech Ltd LCD MODULE 128240D SERIES Version : 1.2 P 12 of 21 • FUNCTION TEST • APPEARANCE INSPECTION • PACKING SPECIFICTION • Put under the lamp (20w*2) at a distance 100mm from the LCD Modules. • Tilt upright 45 degree by the front (back) to inspect LCD appearance. • SAMPLING METHOD • SAMPLING PLAN • MAJOR DEFECT • MINOR DEFECT • GENERAL LEVEL 0.65% (MAJOR) 2.5% (MINOR) II/NORMAL View area Viewing boundary

Open the catalog to page 12

Displaytech Ltd LCD MODULE 128240D SERIES Version : 1.2 P 13 of 21 1) FUNCTIONAL TEST STANDARD Inspection Standard Description Defect type Display wrong pattern Display segment open Dimsegment I Dimsegment Reject Wrong LCD viewing direction Pattern parallelism

Open the catalog to page 13

Displaytech Ltd LCD MODULE 128240D SERIES Version : 1.2 P 14 of 21

Open the catalog to page 14

Displaytech Ltd LCD MODULE 128240D SERIES Version : 1.2 P 15 of 21 Standard description of inspection Defect type Line defect Finger print PCB/COB specification PCB deformity Deformity at PCB edge, damage circuit. Damage excess 2x2mm at the PCB corner Scratch on PCB coat/leakage coat on PCB surface Open circuit Color different from one side to another side. Repaired solder mask area Scratch circuit, damage Circuit Bezel specification

Open the catalog to page 15

Standard description of inspection h≦0.01 mm/mm h>0.01 mm/mm Standard Defect type Accept Reject MIN 3.10 Void gap between bezel and PCB Bezel clip incorrectly 4 Solder specification 4.1 Wrong component 4.2 Broken component Reject Reject Component legs extend beyond the pad and Legs >pad distance(w) on solder area >W2 Component legs extend beyond the pad and Legs >pad distance(w) on solder area 1/4W 4.5 CHIP components hoist≦0.5mm 4.6 CHIP components hoist>0.5mm Accept Reject

Open the catalog to page 16

Displaytech Ltd LCD MODULE 128240D SERIES Version : 1.2 P 17 of 21

Open the catalog to page 17

Displaytech Ltd LCD MODULE 128240D SERIES Version : 1.2 P 18 of 21 ■ PRECAUTIONS FOR USING LCD MODULES 1. This device is susceptible to Electro-Static Discharge (ESD) damage. Observe Anti-Static precautions. 2. The display panel is made of glass. Do not subject it to a mechanical shock by dropping it or impact. 3. If the display panel is damaged and the liquid crystal substance leaks out, be sure not to get any in your mouth. If the substance contacts your skin or clothes, wash it off using soap and water. 4. Do not apply excessive force to the display surface or the adjoining areas since this...

Open the catalog to page 18

Displaytech Ltd LCD MODULE 128240D SERIES Version : 1.2 P 19 of 21 When storing the LCD modules, avoid exposure to direct sunlight or to the light of fluorescent lamps. Keep the modules in bags (avoid high temperature / high humidity and low temperatures below 0°C). Whenever possible, the LCD modules should be stored in the same conditions in which they were shipped from our company. Liquid crystals solidify under low temperature (below the storage temperature range) leading to defective orientation or the generation of air bubbles (black or white). Air bubbles may also be generated if the module...

Open the catalog to page 19

Displaytech Ltd LCD MODULE 128240D SERIES Version : 1.2 P 20 of 21 Since this module uses a CMOS LSI, the same careful attention should be paid to electrostatic discharge as for an ordinary CMOS IC. 1. Make certain that you are grounded when handing LCM. 2. Before remove LCM from its packing case or incorporating it into a set, be sure the module and your body have the same electric potential. 3. When soldering the terminal of LCM, make certain the AC power source for the soldering iron does not leak. 4. When using an electric screwdriver to attach LCM, the screwdriver should be of ground potentiality...

Open the catalog to page 20

Displaytech Ltd LCD MODULE 128240D SERIES Version : 1.2 P 21 of 21 When storing LCDs as spares for some years, the following precautions are necessary. 1. Store them in a sealed polyethylene bag. If properly sealed, there is no need for desiccant. 2. Store them in a dark place. Do not expose to sunlight or fluorescent light, keep the temperature between 0°C and 35°C. 3. The polarizer surface should not come in contact with any other objects. (We advise you to store them in the container in which they were shipped.) • Do not leave them for more than 168hrs. at 60°C. • Should not be left for more...

Open the catalog to page 21

128240D-Series

128240D-Series

Catalog excerpts

All Displaytech catalogs and technical brochures