What is the principle of the LCD screen:
1. Liquid crystal is an organic compound. Under normal temperature conditions, it exhibits both liquid fluidity and optical anisotropy of crystals, so it is called "liquid crystal". Under the influence of external conditions such as electric field, magnetic field, temperature and stress, its molecules are prone to rearrangement, which changes the various optical properties of liquid crystals. The anisotropy of liquid crystals and their molecular arrangement are susceptible to external electric and magnetic fields. control. It is the physical basis of this liquid crystal, that is, the "electro-optical effect" of liquid crystals, that light is modulated by electrical signals, and liquid crystal display devices are made. Under the action of different electric currents and electric fields, the liquid crystal molecules will be regularly rotated 90 degrees to produce a difference in light transmittance, so that the difference between light and dark when the power is turned on/off, according to this principle to control each pixel, you can form the desired image .
2. When the electricity is turned on, the arrangement becomes orderly, which makes the light easy to pass; when the electricity is not turned on, the arrangement is chaotic and prevents the light from passing. Let the liquid crystal block or allow light to penetrate like a gate. Technically speaking, the LCD panel contains two very delicate soda-free glass materials, called Substrates, with a layer of liquid crystal in between. When the light beam passes through this layer of liquid crystal, the liquid crystal itself will stand in rows or twist in an irregular shape, thus blocking or allowing the light beam to pass smoothly. Most liquid crystals are organic compounds, composed of long rod-shaped molecules. In the natural state, the long axes of these rod-shaped molecules are roughly parallel. Pour the liquid crystal into a well-machined slotted plane, and the liquid crystal molecules will align along the grooves, so if the grooves are very parallel, the molecules are also completely parallel.
