LCD module surface affixed with a protective film to prevent the display surface contamination during assembly , before the end of the whole assembly must not be thrown off .
Two: to prevent electrostatic
LCD module Embedded LCD driver chip is massive COMS circuit can easily be electrostatic breakdown , while the electrostatic breakdown is irreparable , so in operation , assembly and use should prevent static electricity , it must be noted :
1 : You can not cheat hand free to touch LCD driver chip and circuit board modules , if you must contact must take anti-static wrist strap , anti-static finger sets / gloves, best to wear anti-static clothing , so the human body is well grounded.
2 : table, iron and tools well grounded .
3 : keep the humidity in the workplace than RH60%.
4 : Packing materials are anti-static material.
Three: Welding
1 : the tip temperature less than 280 ℃.
2 : Welding time is less than 3-4S.
3 : Do not use acid flux .
4 : Repeat soldering no more than three times, and each repetition interval of five minutes .
5 : Wash thoroughly after soldering , welding to prevent short circuits and signal interference , be careful not to spill the cleaning liquid onto the backlight.
Four: Installed
Not secretly change the LCD module supplier. Such as: change parts , change the circuit , twisting iron frame foot , demolition of PCB board processing . The above behavior caused LCD module does not display all do not give maintenance , except with the consent of our staff only .
Five: Testing
1 : LCD module and microcontroller connection refer to " wiring diagram ." Note the positive and negative polarity power supply can not be wrong , or cause overcurrent, overvoltage, burned chip circuit.
2 : After the correct wiring, began testing the liquid crystal display module , first open the logic power , then turn LCD drive power supply module ; time off , first turn off the LCD drive power supply module , and then turn off the logic supply at the positive supply. after stable access to the input signal level , such as the input signal level before and after disconnecting the power supply stable or may damage the China LCD display module IC.
3 : LCD display module with temperature changes and changes accordingly. When the ambient temperature exceeds the operating temperature of the liquid crystal display module , a liquid crystal state disappeared into the liquid , black display , this time must not be energized, and so reduce the temperature of self-healing ; Conversely , low temperature , ice crystals begin crystal flower , causing permanent damage. Another long-term storage at extreme temperatures or by vibration, shock , LCD will produce bubbles.
This is applied to the liquid crystal display module temperature compensation circuit reasons, or add an external potentiometer to adjust the contrast.
4: The LCD module can output VOP too , will affect the display, but also shorten the life of the module. Please refer to the correct voltage VOP each product specification.
Five: Storage
1 : Keep the original packaging.
2 : Wide Temperature save in the range of -30 ℃ ~ +80 ℃; ordinary temperature type stored in the range of -10 ℃ ~ +60 ℃.
3 : Put the dark, to avoid glare .
4 : You can not put anything on the surface pressure .
5 : Avoid storage in extreme temperature / humidity conditions.
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