亚洲人大战欧洲人A片-日韩精品99久久久久久-欧美人与物另类-亚洲精品xxxx-国产精品视频裸体免费-国产精品高潮呻吟久久影视A片-亚州视频一区二区三区-黄色一级无码毛片高清视频

From the section view of the upper internal structure, it can be seen that the liquid crystal screen is composed of light diffuser, storage capacitor, row and column electrodes, glass bottom plate, polarized glass plate, TFT, transparent display electrode, transparent common electrode and color filter. The liquid crystal is located between the transparent display electrode and the transparent common electrode in Figure 6. The functions of each component will be introduced one by one.

In the production of TFT LCD, TFT LCD should be combined with other components as a whole. Due to the particularity of TFT LCD, the need for special tools for connection and assembly, as well as the difficulty of operation technology, the manufacturers sealed the TFT LCD, connectors, driving circuit PCB, backlight unit and other components with steel plate, leaving only the backlight plug and driving circuit input socket, This kind of component is called LCD module (LCM), which is also called LCD panel and LCD panel. It can be seen that this way of assembly not only increases the reliability of work, but also prevents users from unnecessary damage caused by random disassembly. LCD manufacturers only need to connect the plug of backlight and drive circuit with external circuit board, which makes the production process of the whole machine much simpler. Figure 1 shows the internal structure of the LCD panel, and Figure 2 shows the internal circuit diagram of the LCD panel (the resolution of the LCD screen is 1024 × RGB × 768）。

Figure 1 internal structure of TFT LCD panel

Figure 2 internal circuit block diagram of TFI LCD panel

The backlight in the LCD panel generally needs high voltage. Therefore, in the LCD, high voltage is generated by the high voltage board circuit (also known as inverter) outside the panel, and is sent to the backlight through the high-voltage plug. According to the size of LCD screen and the different requirements for display, the number of backlight is different. For example, in the early LCD, a lamp tube was used, which was generally located at the top of the screen, and then gradually developed into two tubes, one on the top and the next. Now the notebook display screen mostly adopts this method; At present, some large desktop LCD screens use four tubes, and the high real large screen displays use six, eight or more. The main board circuit outside the LCD panel is connected with the panel interface through panel line arrangement. Different LCD panels adopt different interface forms, mainly including 17L interface and LVDS interface. The specific contents of panel interface will be introduced in the following chapters. There are also several PCB blocks in the LCD panel, which are distributed with timing controller (tc0n, sometimes referred to as screen display IC), row driver, column driver and other components, as shown in Fig. 3. After processing by tc0n of LCD panel, the data and clock signals from the main board circuit are separated from the trip driving signal and column driving signal, and then sent to the row and column electrodes of the LCD screen respectively to drive the LCD display to display images.