Under the action of the electric field, the alignment direction of the liquid crystal molecules changes, so that the light transmittance of the external light source changes (modulates), and the electro-optical conversion is completed. Then, using the different excitation of the three primary color signals of the R-Grector B, the color reproduction in the time domain and the space domain different from the CRT color picture tube is completed through the three main color filters of red, green, and blue. It uses digital addressing and digital signal excitation to reproduce images, and the physical properties of liquid crystals are such an organic compound.
At room temperature, it not only exhibits the liquid fluidity of crystals but also exhibits the optical properties of crystals, so it is called a liquid crystal. Under the influence of external conditions such as electric field, magnetic field, temperature, and stress, its molecules are easily rearranged. This makes the various optical properties of the liquid crystal have corresponding changes. The specificity and molecular arrangement of liquid crystals are easily controlled by external electric and magnetic fields, which is the physical basis for the formation of such liquid crystals. That is the electro-optic effect of liquid crystals.
Light is modulated by an electrical signal to produce a liquid crystal display. Under the action of different currents and electric fields, the liquid crystal molecules will regularly rotate 90 degrees, resulting in different light transmittances. Therefore, when the power is turned on or off, there is a difference between light and dark. According to this principle, each pixel can be controlled to form the desired image. The physical property of the liquid crystal is that when it is energized, it is turned on and arranged in order. Let light pass easily.
When it's not energized, the arrangement is chaotic, preventing light from passing through, and allowing the liquid crystal to act like a gate to block or let light through. Technically, an automotive LCD panel consists of two very delicate pieces of soda-free glass material, which he calls a substrate with a layer of liquid crystal in between. When the light beam passes through this layer of liquid crystal, the liquid crystal itself will be arranged in rows or irregularly twisted, thereby blocking or allowing the light beam to pass smoothly.