HOW TO USE LCD PANEL & LCD MODULES

1.Liquid Crystal Display (LCD)

¡¡LCD is composed of glass and polarizer. Pay attention to the following items when handling.
(1) Please keep the temperature within specified range for use and storage. Polarization degradation, bubble generation or polarizer peel-off may occur with high temperature and high humidity.
(2) Do not touch, push or rub the exposed polarizers with anything harder than an HB pencil lead (glass, tweezers, etc.).
(3) N-hexane is recommended for cleaning the adhesives used to attach front/rear polarizers and reflectors made of organic substances which will be damaged by such chemicals as acetone, toluene, ethanol and is opropy-alcohol.
(4) When the display surface becomes dusty, wipe gently with absorbent cotton or other soft material like chamois soaked in petroleum benzene. Do not scrub hard to avoid damaging the display surface.
(5) Wipe off saliva or water drops immediately. Contact with water over a ling period of time may cause deformation or color fading.
(6) Avoid contacting oil and fats.
(7) Condensation on the surface and contact terminals due to cold will damage, stain or dirty the polarizers. After products are tested at low temperatures they must be warmed up in a container before coming is contact with room temperature air.
(8) Do not put or attach anything on the display area to avoid leaving marks on.
(9) Do not touch the display with bare hands. This will stain the display area and degrade insulation between terminals. (Some cosmetics are detrimental to the polarizers).
(10) As glass is fragile, it tends to become chipped during handling especially on the edges. Please avoid dropping or jarring.

2. Installing LCD Modules

The hole in the printed circuit board is used to fix. LCM as shown in the picture below. Attend to the following items when installing the LCM.
(1) Cover the surface with a transparent protective plate to protect the polarizer and LC cell.

(2) When assembling the LCM into other equipment, the spacer to the bit between the LCM and the fitting plate should have enough height to avoid causing stress to the module surface. Refer to the individual specifications for measurements. The measurement tolerance should be K0.1mm

3. Precaution for Handling LCD Modules

Since LCM has been assembled and adjusted with a high degree of precision, avoid applying excessive shocks to the module or making any alterations or modifications to it.
(1) Do not alter, modify or change the shape of the tab on the metal frame.
(2) Do not damage or modify the pattern wiring on the printed circuit board.
(3) Do not damage or modify the pattern wiring on the printed circuit board.
(4) Absolutely do not modify the zebra rubber strip (conductive rubber) or touch it with another object.
(5) Except for soldering the interface, do not make any alterations or modifications with a soldering iron.
(6) Do not drop, bend or twist LCM.

4. Electro-Static Discharge Control

Since this module uses a CMOS LSI, the same careful attention should be paid to electrostatic discharge as for ordinary CMOS IC.
(1) Make certain that you are grounded when handling LCM.
(2) Before removing LCM from its packing case or incorporating it into a set, be sure that the module and your body have the same electric potential.
(3) When soldering the terminal of LCM, make certain that 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 to minimize as much as possible any transmission of electromagnetic waves produced sparks coming from the commutator of the motor.
(5) As far as possible make the electric potential of your work clothes and the work benches the ground potential.
(6) To reduce the generation of static electricity is careful that the air in the working environment is not too dry. (A relative humidity of 50%-60% is recommended.)

5 Precaution for Soldering to the LCM

(1) Observe the following when soldering lead wire, connector cable, etc., to the LCM.
n Soldering iron temperature: 280LCK10LC
n Soldering time: 3-4 sec.
n Solder: eutectic solder
If soldering flux is used, be sure to remove any remaining flux after finishing to soldering operation. (This does not apply in the case of a non-halogen type of flux.) It is recommended that you protect the LCD surface with a cover during soldering to prevent any damage due to flux spatters.
(2) When soldering the electroluminescent panel and PC board, the panel and board should not be detached more than three times. This maximum number is determined by the temperature and time conditions mentioned above, though there may be some variance depending on the temperature of the soldering iron.
(3) When removing the electrluminescent panel from the PC board, be sure that the solder has completely melted, the soldered pad on the PC board could be damaged.

6. Precautions for Operation

(1) Viewing angle varies with the change of liquid crystal driving voltage (V0)
Adjust V0 to show the best contrast.
(2) Driving a LCD in the voltage above the limit shortens its life.
(3) Response time is greatly delayed at temperatures below the operating temperature range. The display area becomes dark color at temperatures above this range. However, this does not mean the LCD will be out of order, it will recover when it returns to the specified temperature range.]
(4) If the display area is pushed hard during operation, the display will become abnormal. However, it will return to normal if it is turned off and then back on.
(5) Condensation on terminals can cause an electrochemical reaction disrupting the terminal circuit. Therefore, it must be used the relative condition of 40LC, 50% RH.
(6) When turning on power, input each signal after the positive/negative voltage becomes stable.

7. Storage

When storing LCDs s spares for some years, the following precautions are necessary.
(1) Store them in a sealed polyethylene bag. If properly sealed, there's no need for dessicant.
(2) Store them in a dark place, do not expose to sunlight or fluorescent light. Keep the temperature between 0LC and 35LC.
(3) The polarizer surface should not come in contact with any other object. (We advise you to store them in the container in which they were shipped).
(4) Environmental conditions:
2 Do not leave them for more than 168 hrs at 60LC.
2 Should not be left for more than 48 hrs at -20LC

8. Safety

(1) It is recommended to crush damaged or unnecessary LCDs into pieces and wash them off with solvents such as acetone and ethanol, which should later be burned.
(2) If any liquid leaks out of a damaged glass cell and comes in contact with the hands, wash off thoroughly with soap and water.

9. Limited Warranty

Unless otherwise agreed between Jewel Hill and customer, Jewel Hill will replace or repair any of its LCD and modules which are found to be functionally defective when inspected in accordance with Jewel Hill LCD acceptance standards (copies available upon request), for a period of one year from date of shipments. Cosmetic/visual defects must be returned to Jewel Hill within 90days of shipment. Confirmation of such date be based on freight documents. The warranty liability of Jewel Hill is limited to repair and/or replacement on the terms set forth above. Jewel Hill will not be responsible for any subsequent or consequential events.

10.Return LCM under Warranty

No warranty can be granted, if the precautions stated above have been disregarded. The typical examples of violations are:
2 Broken LCD glass;
2 PCB eyelet's damaged or modified;
2 PCB conductors damaged;
2 Circuit Modified in any way, including addition of components;
2 PCB tampered with by grinding, engraving or painting varnish;
2 Soldering to or modifying the bezel in any manner.
Module repairs will be invoiced to the customer upon mutual agreement. Modules must be returned in antistatic packaging together with sufficient description of the failures or defects. Any connectors or cables installed by the customer must be removed completely without damaging the PCB eyelet's, conductors and terminals.

DON'T SWALLOW OR TOUCH LIQUID CRYSTAL! Liquid crystal may leak out of a cracked or damaged display. If liquid crystal gets on your hands, wash them immediately.

PROTECT DISPLAYS AGAINST FORCE AND IMPACTS Placing excessive pressure on a display may disturb its assembled contents. Displays may become cracked or damaged if subject to strong impacts.

HANDLE POLARIZERS GENTLY Polarizers are made from materials that scratch easily when handled Wipe polarizer with a dry, soft cloth dipped in benzene (do not use organic solvents)

DO NOT DRIVE LCDs WITH DC VOLTAGES Driving LCDs with DC or at higher then rated voltages will reduce the lifetime of the display

KEEP LCDs AWAY FROM WATER AND MOISTURE Extended exposure to water or moisture can damage the polarizer or corrode the electrodes on a LCD panel.

CLEAN TERMINALS WITH ALCOHOL Wipe the terminals with alcohol before bonding with a heat seal or ACF film

WHEN CONNECTING A LCD PANEL TO A CIRCUIT BOARD It is best to use a flexible connector or rubber. Do not attempt to directly solder or mechanically connect. Panels with pin connectors can be directly soldered to the board.

PROTECT ROOT OF PINS AGAINST HEAT AND STRESS Stress and high temperatures can damage the pin-terminal connection. Mount LCDs 3mm away from PCBs. Do not too much force to the display while soldering the pins.

DO NOT WASHING PCB AFTER IT IS SOLDERED TO LCD The freon and trichloroethane washes used to clean the PCB will get on the pin attachment area and degrade the epoxy bonding the pin to the panel.

KEEP LCDs AWAY FROM HIGH TEMPERATURES AND HUMIDITY Store LCDs in a clean place at temperatures between 5¢X - 45¢X C and 40% - 60% humidity.

PEEL PROTECTIVE FILM OFF SLOWLY The film can generate static electricity if peeled off too quickly.

AVOID PRESSING DOWN HARD ON BEZEL AND/OR PCB Putting too much pressure on the bezel and/or PCB can deform the rubber or damage the display cell or backlight.

DO NOT DISASSEMBLE THE MODULE Disassembling the module can cause the LCD to shift out of position or deform the conductive rubber.

HANDLE THE CCFL CAREFULLY CCFLs are fragile components. Handle them carefully and avoid impacts during assembly.

ESD PROTECTION & LCM SOLDERING LCD modules contain electronic components that are sensitive to electrostatic discharge. Adequate measures should be taken to protect the module against ESD. Make sure you ground yourself, soldering iron and other tools used during assembly. Do not solder at temperatures higher than 280¢XC or for more than 3 -4 secs. Do not use flux for soldering. Flux can leak into the module and contaminate the components inside. Make sure the solder is completely melted when removing a connector or cable from the I/O terminal. Do not solder any component more than three times ¡@