The working principle of LCD liquid crystal display module

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

There is indeed a special fluid in the LCD screen, which is called liquid crystal. As its name suggests, liquid crystal has both liquid and crystal properties: on the one hand, it can flow like a liquid; on the other hand, its molecules are arranged in an orderly manner like a solid crystal, which can be said to be between liquid and solid. state between. By applying different voltages to the liquid crystal layer in the screen, the arrangement of its molecules can be changed, and different optical properties, such as light transmittance, can be displayed. This photoelectric effect is the basic principle of liquid crystal screen imaging.

There are many kinds of liquid crystals, the common ones are biphenyl liquid crystal, phenylcyclohexane liquid crystal and ester liquid crystal. Traditional display screens such as CRT picture tube displays (electron beams excite phosphors on the inner surface of the screen to display images) are often large in size, while liquid crystal screens can be very thin and light, and require low voltage and power consumption, so they are more vulnerable. favor.