Storage Precautions

When storing the LCD modules ,the following precaution is necessary.

(1) Store them in a sealed polyethylene bag. If properly sealed ,there is no need for the dessicant

(2) Store them in a dark place .Do not expose to sunlight or fluorescent light, keep the temperature between 0℃and 35℃.

(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.

Others

   Liquid crystal solidify under low temperature (below the storage temperature  range )leading to defective  to defective orientation or the generation of  air bubbles(black or white).Air bubbles may also be generated if the module is subject to a low temperature.

   If the LCD modules have been operating for a long time showing the same display patterns, the display patterns may remain on the screen as ghost images and a slight contrast irregularity may also appear .A normal operating status can be  regained by suspending use for some time .It should be noted that this phenomenon does not adversely affect performance reliability.

   To minimize the performance degradation of the LCD modules resulting from destruction caused by static electricity etc.. exercise care to avoid holding the following sections when handling the modules .

   -Exposed area of the printed circuit board.

   -Terminal electrode sections.

USING LCD MODULES

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±0.1mm.

Precaution for assemble the module with BTB connector:

   Please note the position of the male and female connector position, don’t assemble or assemble like the method which the following picture shows

Precaution for soldering to the LCM

(1) 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 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 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 remove the electroluminescent panel form the PC board ,be sure the solder has completely melted ,the soldered pad on the PC board could be damaged.

Precautions for Operation

(1) Viewing angle varies with the change of liquid crystal driving voltage(VLCD).Adjust VLCD to show the best contrast.

(2) It is an indispensable condition to drive LCD’s within the specified voltage limit since the higher voltage then the limit cause the shorter LCD life .An electrochemical reaction due to direct current causes LCD’s undesirable deterioration, so that the use of direct current drive should be avoided.

(3) Response time will be extremely delayed at lower temperature than the operating temperature range and on the other hand at higher temperature LCD’S show dark color in them. However those phenomena do not mean malfunction or out of order with LCD’s, which will come back in the specified operating temperature.

(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) A slight dew depositing on terminals is a cause for electro-chemical reaction resulting in terminal open circuit .Usage under the maximum operating temperature ,50%RH or less is required.

(6) Input each signal after the positive /negative voltage becomes stable.

(7) 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.

Safety

(1) It is recommended to crash damaged or unnecessary LCDs into pieces and wash them off with solvents such as acetone 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.

Limited Warranty

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

Return LCM under warranty

   No warranty can be granted if the precautions stated above have been disregarded. The typical examples of violation are:

      -Broken LCD glass.

      -PCB eyelet is damaged or modified

      -PCB conductors damaged

      -Circuit modified in any way, including addition of components.

      -PCB tampered with by grinding, engraving or painting varnish.

      -Soldering to or modifying the bezel in any manner.

   Module repairs will be invoiced to the customer upon mutual agreement .Modules must be returned with sufficient description of the failures or defects. Any connectors or cable installed by the customer must be removed completely without damaging the PCB eyelet ,conductors and terminals.