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How to assemble LCD LCD screen correctly?

 Many devices in our lives will use LCD LCD screen, today to specifically analyze how to properly assemble LCD LCD screen, I hope to help you.
LCD the tools assembled by the LCD screen are mainly hammers and wrenches, which are used to screw the frame foot. The order of assembly operation is to put all the tools and raw materials on the workbench in an orderly manner first. Second, the shell according to the process card instructions correctly placed on the worktable, if there is assembly tooling, as required on the tooling, pay attention to the shell direction to be correct. Next remove the protective film of the LCD screen, wipe the electrode with dust-free paper, confirm the direction, according to the process card instructions, correctly put into the shell. remove the circuit board, if you want to add a backlight, the backlight is first fixed on the PCB board. Align the circuit board to the frame position according to the process card. Load the housing to press the zebra strip and fix the housing and circuit board with special assembly tools. Pay attention to twist the frame foot into 45° angle, do not gnaw the plate and break the small tft display line, so that the frame is in parallel contact with the PCB plate. Finally, the finished product will be assembled, removed from the table, affixed protective film, put into the turntable. Pay attention to make the screen and screen opposite, plate and plate opposite, so as not to cause scratches, product assembly finished inspection personnel inspection, unqualified reassembly.
LCD purpose of the LCD screen assembly is to make the screen and the circuit board of each electrode one-to-one correspondence, so that it completes the electrical. But because the screen is not in direct contact with the circuit board, and through the conductive rubber strip as the medium, so that the screen and the plate can not be visually corresponding, so that the respective corresponding electrodes can not correspond to each other, resulting in dislocation phenomenon. In the assembly process, the corresponding electrode connections between the screen and the circuit board are referred to as the opposite position. In the assembly, the corresponding position between the screen and the board is realized mainly by the opposite position between the screen and the board and the shell and the board. shell as intermediate medium, as the corresponding standard between screen and shell, plays a great role in the opposite position. Yes  The bit method mainly includes edge alignment, pinhole alignment and middle alignment.
 Advantages and disadvantages of LCD LCD semi-reverse semi-permeable LCD
 Come to talk with you today about LCD LCD half-reverse half-permeable LCD mode advantages and disadvantages, the following to understand together.
semi-reflective LCD abbreviated TR-LCD, it is a word for transmission and reflection synthesis. TR-LCD structure, because the reflected light passes through the liquid crystal layer twice, the light path of the reflected light is twice different from that of the transmitted light region. TR-LCD disadvantage is that when the surrounding environment light is not too dark, turn on the backlight, and see the image of the transmission region and the reflection region at the same time, which reduces the brightness of the picture quality. In addition, in the reflection region, the light passes through the color film layer twice, and the image of the reflection region and transmission region has color deviation. The process of making reflection zone and transmission zone with different thickness is complicated, and the driving characteristics of transmission zone and reflection zone are different  has brought many difficulties in practical production and application.
 LCD classification can be divided into five main types according to display technology, such as OLED、TFT-LCD、TFD-LCD、SIN-LCD、GF-LCD.
The technology LCD backlight can also be divided into reflective LCD and transmission LCD.. The transmission type LCD display depends on the backlight source and consumes a lot of electricity, but the reflection type LCD does not need the backlight source, it is dependent on the environment light display, the power consumption is low, suitable for mobile phone, PDA and other portable electronic products, so the reflection type LCD has been studied for a long time.

The early antireflective LCD used 90°TN mode, using two polarizers, and later proposed a reflective mixed mode using one polarizer TN、 reflective VA and other modes. a disadvantage of reflective LCD is that the ambient light is reflected on the panel, and the contrast is only 5:1-30:1. Because reflective LCD are mainly used in products such as e-books, it is required to achieve the reflectivity of general paper, that is ,70-90%.

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