I'm surprised you asked this question.

1:-Technically speaking, the LCD panel contains two pieces of quite exquisite sodium-free glass materials, called Substrates, with a layer of liquid crystal sandwiched between them. Liquid crystal is an intermediate substance between crystal state and liquid state. It has some characteristics of liquid and crystal, shows some unique properties, and is sensitive to electromagnetic field. Combined with photoelectric principle, it conducts when it is energized, and the arrangement becomes orderly, making light easy to pass through. When there is no electricity, the arrangement is chaotic, preventing light from passing through. Let the liquid crystal block or let the light pass through like a gate. This is the reason for displaying graphic information.

2:-The power supply of liquid crystal depends on the circuit, and the driving chip is bound on the FPC pin with glass as the substrate. (A highly reliable and excellent flexible printed circuit board made of polyimide or polyester film as the substrate. Referred to as flexible board or FPC, it has the characteristics of high wiring density, light weight and thin thickness. We call this driving architecture mode TAB (also called GTAB). It should be the abbreviation of TABulator.

3: You must have seen a broken electronic watch or calculator, and that one uses a liquid crystal display, and you will find that the connection between the power supply cable and the liquid crystal sodium-free glass material is very precise, which is particularly easy to break. So I remind you that the display failure caused by the tab pressing part of the computer LCD screen is often manifested as a thin horizontal line, which is basically difficult to repair! There is no cost performance. And vertical bar failures are often easy to handle, because vertical bars are often unlikely to be caused by TAB. (I seriously doubt and easily guess that you must have encountered this problem! )