LCD Module_What's the Work Principle of LCD Module

Liquid crystal display (LCD) is a very common electronic display in our life. Hearing its name, you may wonder if there is any liquid in it?

There is a special fluid in the LCD display, which is called liquid crystal. Just like its name, liquid crystal has some properties of both liquid and crystal: on the one hand, it can flow like a liquid; On the other hand, the arrangement of molecules is as orderly as that of solid crystals, which can be said to be a state between liquid and solid. By applying different voltages to the liquid crystal layer in the screen, the arrangement of its molecules can be changed and show different optical properties, such as light transmittance. This photoelectric effect is the basic principle of liquid crystal screen imaging.

There are many kinds of liquid crystals, such as biphenyl liquid crystals, phenyl cyclohexane liquid crystals and ester liquid crystals. Traditional display screens such as CRT image tube display (the phosphor on the inner surface of the screen is excited by the electron beam to display images) tend to be large in size, while the LCD screen can be very light and thin, with low voltage and low power consumption, so it is more popular