Liquid crystal display (LCD):
1 liquid crystal display (LCD) should be prevented from applying the DC voltage to the DC component of the DC component as small as possible. Maximum not more than 50mV, long time of the application of large DC component, will occur electrolysis and electrode aging, so as to reduce the life span.
2 liquid crystal display (LCD) should be prevented from UV irradiation: liquid crystal and polarizing film is organic matter, in the ultraviolet irradiation will occur photochemical reaction, degradation, so the liquid crystal display device should be based on the use and use of the environment to consider whether the need in front of the device anti UV filter or other UV method. Use should also avoid long hours of direct sunlight.
3 liquid crystal display (LCD) should prevent the erosion of harmful gases: liquid crystal and polarizing film is organic matter, in the environment of harmful gases, chemical reaction, degradation, so in use should take harmful gas isolation measures, in addition to the whole assembly, do not carry out long storage, to prevent plastic shell and circuit board cleaning agent concentration of chemical gas.
4 liquid crystal display device is made of two pieces of glass, between them only 5~10um, very thin. And the inner surface of the glass is coated with a layer of directional film, which is easy to destroy. It should also be noted that the following: the surface of the liquid crystal device can not be too much pressure, so as not to damage the directional layer. In case of assembly process in addition to the pressure of large or hand by the device, the need to set up an hour later. In the power of the process, remember that there is no change in temperature. Device when the pressure to be uniform, only the device side, not the middle, can not tilt force.
5 by the liquid crystal state in excess of a certain temperature range, it must be kept and used in the specified temperature range. Temperature is too high, the liquid crystal state disappeared, into a liquid, a black display is, cannot work, please note that at this time do not electricity, after lowering the temperature can recover by itself. If the temperature is too low, the liquid crystal to form ice, causing permanent damage. In addition to a long time stored in the limit temperature or vibration, shock, LCD will produce bubbles.
6 to prevent the rupture of glass: because the display is made of glass, if the loss, the glass will break down, so the whole machine design must test the filter assembly method and assembly of resistance to vibration and impact resistance.
7 devices of moisture: due to the low voltage, micro power, liquid crystal material resistivity is very high (up to 1X1010). Therefore, due to the humidity caused by the surface of the glass may cause the device in the display, the "string" phenomenon, so the whole design must consider the moisture. At ordinary times, as far as possible in the temperature 5~30, humidity 65%.
8 liquid crystal display device cleaning process: because the liquid crystal surface is a plastic type of polarizing film and reflective film, so the assembly and storage should be avoided to scratch the surface. In addition to a layer of protective film on the front of the front, the use of the. If the device surface pollution dirty, can use soft cloth, cotton processing. If you must with solvent cleaning, only with isopropanol (glycerin), alcohol, freon, but never with acetone, aromatic solvents, such as toluene, or device surface of polarizer will damage.
. if there is a metal pin of the LCD and welding pins, solder joints shall be at a distance from the root of 4 mm or longer, and can not be affected by the force is too large, overheating, so as not to break the connection. The maximum temperature resistance of the joint shall not exceed
Liquid crystal display module (LCM):
One, the operation notes:
1, the display is made of glass, do not apply to mechanical shocks, such as falling from the height, etc..
2, if the display damage, internal liquid crystal leakage, do not make it into the mouth. Wash clothes or skin with soap and water quickly.
3, do not have the display surface or the LCD module to connect the region to exert a large force, because this will lead to tonal changes.
4, the LCD module display surface of the polarization is soft, and easy to scratch, careful operation.
5, if the LCD module display surface dirty, with a soft dry cloth wipe. If serious fouling, using isopropanol or ethanol (alcohol), with a damp cloth to wipe.
6, other solvents may damage the polarizing film, especially water, ketones, aromatic agent, etc..
7, the use of mounting holes to install the LCD module, which make the distortion, bending and deformation. Deformation will have a significant impact on the quality of the display.
8, the installation of the LCD module, do not forcibly pull or bend I/O lead or backlight.
9, touching the TAB module of LCD may lead to abnormal display, do not touch TAB.
10, do not remove the LCD module.
11, NC feet to the left, not to take anything.
12, if the logic circuit power supply cut off, do not enter the signal.
13, in order to prevent damage to the component of static electricity, to maintain a good working environment.
14, to avoid open circuit, to be careful of the operation of the heat seal paper.
15, glass screen edge sharp, careful operation.
Two, storage note
1, storage LCD module, to avoid direct exposure to sunlight or fluorescent light. The LCD module is kept in the anti - static bag, and Yu Shiwen is kept under the wet condition. (avoid high humidity / high temperature and low temperature below 0. ) if possible, LCD module should be kept in out from my company under the condition.
A, take the dynamic module, do not fall on the ground.
B, assembly tools, such as iron, must be properly grounded.
C, in order to reduce the generation of static electricity, do not implement the assembly and other work in the dry environment.
D, LCD module has a protective screen film. Be careful to tear the protective film, because