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128240C-Series

128240C-Series

Product catalog summary

General Specification:
The 128240C Series LCD Module features a 240 x 128 dot display with a dot size of 0.22 x 0.22 mm. The view area is 70.0 mm x 35.0 mm, and the module size is 77.4 mm x 52.4 mm x 9.3 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 ST7529-G, operating on a 1/144 duty and 1/12 bias driving method.

Absolute Maximum Ratings:
Power supply for logic ranges from -0.5 to 4.0 V, and for LCD from -0.5 to 20.0 V. Input voltage is between -0.5 and VDD+0.5 V. The supply voltage for LED backlight 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 and 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 supply current for LCM is 2.0 mA, and for LED backlight, it is 80 mA.

Electro-Optical Characteristics:
Recommended operating voltage is 14.5 V at 25°C. Response times Tr and Tf are 240 ms and 200 ms, respectively. Viewing angles are 40° at 0°, 35° at 180°, and 30° at 90° and 270°. Current consumption is 18 µA at 64 Hz.

Backlight Specification:
The backlight has nominal dimensions of 77.40 x 52.40 x 9.30 mm with a viewing area of 72.00 x 41.00 mm. It uses 4 SMT LEDs with a forward voltage of 3.2 V and an average luminous intensity of 225 cd/m². The absolute maximum ratings include a forward current of 120 mA and a reverse voltage of 5 V.

Quality Guarantee:
The inspection standard includes functional tests, appearance inspections, and packing specifications. Major defects have an AQL of 0.65%, while minor defects have an AQL of 2.5%.

Precautions for Using LCD Modules:
Handle with care to avoid ESD damage and mechanical shock. Avoid excessive force on the display surface and use appropriate solvents for cleaning. Ensure proper grounding during assembly to prevent static electricity damage. Follow power supply precautions to avoid exceeding maximum ratings and ensure clean power sources.

Electrical Precautions:

Ensure proper power-up procedures and minimize cable length between the module and host MPU.
For EL backlights, avoid disabling by interrupting the HV line to prevent voltage extremes.
Operate within specified temperature limits.

Mechanical/Environmental Precautions:

Avoid improper soldering and use of flux cleaners.
Mount modules free from torque and stress; avoid touching or scratching the LCD surface.
Employ anti-static procedures and prevent moisture build-up.
Avoid direct sunlight and handle liquid crystal material with care.

Storage Precautions:

Avoid exposure to sunlight and fluorescent lamps; store in original conditions.

Handling LCD Modules:

Maintain specified temperature ranges to prevent polarization degradation.
Use recommended cleaning agents and avoid hard contact with polarizers.
Prevent condensation and avoid touching with bare hands.

Installing LCD Modules:

Ensure proper spacing to avoid stress on the module surface.

Electro-Static Discharge Control:

Ground yourself and the module to prevent static discharge.
Maintain relative humidity between 50%-60%.

Soldering Precautions:

Follow specified temperature and time guidelines for soldering.
Limit detachment of panels and boards to three times.

Operational Precautions:

Adjust liquid crystal driving voltage for optimal viewing angle.
Operate within voltage limits to extend module life.

Storage Guidelines:

Store in sealed polyethylene bags in dark places within specified temperature ranges.

Safety and Warranty:

Dispose of damaged LCDs properly and handle leaks with care.
Warranty covers functional defects for one year; cosmetic defects must be reported within 90 days.

Return Policy:

Warranty void if precautions are disregarded; examples include broken glass and modified circuits.

Revision Record:

Version 1.0: Initial revision on 29 July 2008.
Version 1.1: Added remark on 2 October 2008.

Catalog excerpts

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

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Displaytech Ltd LCD MODULE 128240C SERIES Version : 1.1 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.

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Displaytech Ltd LCD MODULE 128240C SERIES Version : 1.1 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.

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Displaytech Ltd LCD MODULE 128240C SERIES Version : 1.1 P 4 of 21 Displaytech Ltd LCD MODULE 128240C SERIES Version : 1.1 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...

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Displaytech Ltd LCD MODULE 128240C SERIES Version : 1.1 P 5 of 21 NOTE 3: CURRENT CONSUMPTION (I LCD) Displaytech Ltd LCD MODULE 128240C SERIES Version : 1.1 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.

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Displaytech Ltd LCD MODULE 128240C SERIES Version : 1.1 P 6 of 21

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Displaytech Ltd LCD MODULE 128240C SERIES Version : 1.1 P 7 of 21

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Displaytech Ltd LCD MODULE 128240C SERIES Version : 1.1 P 8 of 21

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Displaytech Ltd LCD MODULE 128240C SERIES Version : 1.1 P 9 of 21

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Displaytech Ltd LCD MODULE 128240C SERIES Version : 1.1 P 10 of 21

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Displaytech Ltd LCD MODULE 128240C SERIES Version : 1.1 P 11 of 21 MECHANICAL SPECIFICATIONS ♦ ABSOLUTE MAXIMUM RATING TESTING POINTS CIRCUIT DIAGRAM: CIRCUIT DIAGRAM 1. AVERAGE LUMINOUS INTENSITY IS THE AVERAGE VALUE OF THE NINE INDICATED POINTS AS SHOWN. 2. MEASUREMENT INSTRUMENT: BM-7, APERTURE: ' 10mm.

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Displaytech Ltd LCD MODULE 128240C SERIES Version : 1.1 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

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Displaytech Ltd LCD MODULE 128240C SERIES Version : 1.1 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

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Displaytech Ltd LCD MODULE 128240C SERIES Version : 1.1 P 14 of 21

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Displaytech Ltd LCD MODULE 128240C SERIES Version : 1.1 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

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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

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Displaytech Ltd LCD MODULE 128240C SERIES Version : 1.1 P 17 of 21

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Displaytech Ltd LCD MODULE 128240C SERIES Version : 1.1 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...

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Displaytech Ltd LCD MODULE 128240C SERIES Version : 1.1 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...

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Displaytech Ltd LCD MODULE 128240C SERIES Version : 1.1 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...

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Displaytech Ltd LCD MODULE 128240C SERIES Version : 1.1 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...

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128240C-Series

128240C-Series

Catalog excerpts

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