With the development of science and technology, the use of LCD screens is very widespread in daily life, because the characteristics of each product are different, and each parameter has meaning. Its uses are very broad, including industrial, laptop, touch, medical, automotive, desktop monitors, TVs, etc
Feature 1: Let the current pass through the liquid crystal layer, and these molecules will flow with the current Arrange the direction.
Feature 2: If no current passes through, they will be arranged parallel to each other. If you provide an outer layer with small grooves, after pouring the liquid, the liquid molecules will align along the grooves, and the inner and outer layers will align in the same way.
Feature 3: The liquid layer can cause light to twist. The liquid layer shows some performance Similar to a polarizer, this means that it can also filter out anything except for those from special directions To all light rays that enter beyond.
Working principle: Liquid crystal is an organic compound with a regular molecular arrangement. It is neither a solid nor a liquid, but a substance between solid and liquid states. When heated, it appears in a transparent liquid state, while when cooled, it appears in a cloudy solid state of crystalline particles. Place a liquid crystal cell between two parallel glass substrates, with thin film transistors on the lower substrate glass and color filters on the upper substrate glass. Control the rotation direction of liquid crystal molecules by changing the signal and voltage on the thin film transistors, thereby achieving the display purpose of controlling whether each pixel emits polarized light.
Liquid displays are divided into passive matrix LCD and active matrix L according to different control methods. Passive matrix LCD has limited brightness and visual power, and its response speed is also slower, but it is small and inexpensive.
Category:
1. TN-LCD (Twisted Nematic Lp Push LcD)
2. STN-LCD (SuperTN LCD)
3. DSTN LCD (Double layer STN-LcD dual layer super twisted nematic LCD)
LCD (short for Liquid Crystal Display) is a type of liquid crystal display. The structure of an LCD is to place a liquid crystal cell between two parallel glass substrates, with a TFT (thin film transistor) on the lower substrate glass and a color filter on the upper substrate glass. The rotation direction of the liquid crystal molecules is controlled by the signal and voltage changes on the TFT, thereby achieving the display purpose of controlling whether each pixel emits polarized light or not. Nowadays, LCD has replaced CRT as the mainstream, and its price has also dropped significantly, and it has been fully popularized.
