LED module is the LED (light-emitting diode) according to certain rules arranged together again, together with some waterproofing products.
Memory module

Memory modules can be understood here as the chipset can support the number of standard memory slots.
LCD module

LCD module is a simple point that the display plus backlight components such as LCD TV display components is the LCD module, the CRT is equivalent to the low-temperature CRT tube.The other parts of the LCD module, including power supply circuit, signal processing circuit, of course, There are shells or something.
But the module is mainly divided into screen and backlight components.Two parts are assembled together, but the work is independent of each other (ie, circuit is not relevant).
LCD module brightness
Liquid crystal is a kind of material between the solid and liquid, itself is not luminous, with the help of additional light source Caixing.Therefore, the number of tubes on the LCD brightness.The earliest LCD display only the upper and lower two lamps , To the present, universal type is the lowest four lights, high-end six lights.
Four lamp design is divided into three types: one is the four sides have a lamp, but the drawback is that there will be shadows in the middle, the solution is from top to bottom four lamps arranged in a flat manner, The last one is the 'U' type of display form, in fact, the two lamps produce two lamps in disguise.
Precautions

A) lcd LCD module is installed in high-precision debugging to avoid external impact, do not change or modify it.
B) Do not tamper with any protrusion of the metal frame.
C) Do not punch or change the outline on the PCB, do not move or modify components.
D) Do not touch the conductive rubber, especially when inserting the backlight (eg EL backlight).
E) When installing the LCD module, make sure that the PCB is not subject to twisting or bending force, etc. The contact of the conductive rubber is very precise, and slight misalignment on the original base will cause the pixel to be lost.
F) to avoid the pressure in the metal part of the card, otherwise it will lead to deformation of the conductive rubber and lose contact, resulting in pixel loss.
G) Electrostatic: Since lcd LCD module is equipped with a CMOS circuit inside, the following measures must be taken to avoid static electricity.
H) When you use the LCD module in your product design, note that the viewing angle of the LCD is consistent with the intended use of your product.
I) The LCD screen is glass-based and can be broken or crushed by impact or falling with a hard object, especially at corners.
J) Although the polarizer on the liquid crystal surface has a surface that suppresses the reflection, care should be taken not to scratch the surface. Generally, a protective screen of transparent plastic material is recommended on the liquid crystal surface.
K) If the liquid crystal module is stored below the specified temperature, the liquid crystal material may condense and deteriorate its performance. If the liquid crystal module is stored above the specified temperature, the molecular arrangement of the liquid crystal material may change to liquid state, To the original state. Exceeding the temperature and humidity range, will cause the polarizer flaking or blister.Therefore, the LCD module should be stored in the specified temperature range

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