The working principle of liquid crystal display:
Under the action of the electric field, the arrangement direction of the liquid crystal molecules is changed to change the light transmittance of the external light source (modulation), complete the electrical-optical conversion, and then use the different excitations of the three primary color signals of R, G and B to pass the red and green , Blue three primary color filter film, complete the color reproduction of time domain and space domain.
Because there are control circuits and drive circuits around the liquid crystal material. When the electrodes in the LCD generate an electric field, the liquid crystal molecules will be twisted, so that the light passing through it will be regularly refracted (the optical rotation of the liquid crystal material), and then filtered by the second layer of polarizer and displayed on the screen.
Liquid crystal display has the characteristics of thin body and space saving. Compared with the more bulky CRT display, the liquid crystal display only needs one-third of the space of the former; it saves electricity and does not generate high temperature. It is a low power consumption product. CRT monitors can be completely non-hot; non-radiation, which is good for health, and LCD monitors are completely non-radiation; the picture is soft and does not hurt the eyes.
