How Does A Liquid Crystal Display Work?

The composition and working principle of the liquid crystal display: From the structure of the liquid crystal display, whether it is a notebook screen or a desktop liquid crystal display, the liquid crystal display screen is composed of a layered structure composed of different parts. The liquid crystal display consists of two plates, approximately 1 mm thick, separated by a uniform spacing of 5 μm containing liquid crystal material. Since the liquid crystal material itself does not emit light, a light pipe as a light source is disposed under the display screen, and a backlight plate (or a light homogenizing plate) and a reflective film are disposed on the back of the liquid crystal display screen, and the backlight plate is composed of a fluorescent material. Light can be emitted, the main function of which is to provide a uniform backlight.

The light emitted by the backlight enters the liquid crystal layer containing thousands of liquid crystal droplets after passing through the first polarizing filter layer.

The droplets in the liquid crystal layer are all contained in a small cell structure, and one or more cells constitute one pixel on the screen. Between the glass plate and the liquid crystal material is a transparent electrode, the electrode is divided into rows and columns, at the intersection of the row and the column, by changing the voltage to change the optical state of the liquid crystal, the liquid crystal material acts like a small light valve .