Set the color filter substrate glass on, on the TFT signal and the voltage change to control the rotation direction of the liquid crystal molecules, so as to achieve control of each pixel display emergent polarized light or not and to achieve.

LCD working principle is to use LCD physical properties: electricity arrangement become orderly, make the light easy through; Without power arrangement chaos, prevent light through, let LCD as gate block or allow light to penetrate.

LCD has become the mainstream, the price has dropped a lot. LCD liquid crystal display on market basically has two kinds: DSTN (dual - scan the twisted nematic, double scanning staggered liquid crystal display) and TFT (thin filmtransistor, thin film transistor), which is passive matrix (passive matrix) and the active matrix (active matrix) two kinds.

Now the latest is transparent LCD is now more transparent LCD screen to the fire.