What are the functions of the TFT-LCD liquid crystal module?

The TFT-LCD liquid crystal module is equipped with a semiconductor switch for each pixel, and its processing is similar to that of a large-scale integrated circuit. Because each pixel can be directly controlled by dot pulses, each node is relatively independent and can be controlled continuously, and each of them has different functions. Next, let’s learn about the functions of the TFT-LCD liquid crystal module.

The functions of each part of the TFT-LCD liquid crystal module are described as follows:

1. Storage capacitor: the capacity is about 0.5pF, and its pole is connected with the transparent liquid crystal electrode/transparent common electrode, because the capacity between the transparent liquid crystal electrode and the transparent common electrode is about 0.1pF. The voltage cannot be held until the next screen update (for example, when the refresh rate is 60 Hz, the hold time is about 16ms), so maintenance is required with the help of storage capacitors.

2. TFT: thin film transistor, a switching device that determines whether the liquid crystal is charged (the thin film transistor is only turned on or off. When the thin film transistor is turned on, it outputs a voltage from its source to charge the liquid crystal and the storage capacitor, and the charging voltage is determined by the LCD drive circuit is determined).

3. Glass bottom plate: It is used for isolation.

4. Polarizing glass plate: the polarizing plate, the inner polarizing glass plate 1 is a horizontal opening. The outer polarizing glass plate 2 is a vertical opening.

5. The transparent liquid crystal electrode is connected to the source of each thin film transistor, and forms a charging electrode with the transparent common electrode. to charge the liquid crystal in each pixel.

6. Color filter: also known as color filter, is a piece of glass composed of many transistors, LCD screen liquid crystal color image, this is usually achieved by adding a color filter between the transparent common electrode and the polarizing glass plate of.