The Working Principle Of Black And White LCD Screens

LCD technology actually involves pouring liquid crystals between two columns of finely grooved planes. And the grooves above these two planes are perpendicular to each other (intersecting 90 °). So, if molecules on one plane are arranged in a north-south direction, then molecules on the other plane are arranged in an east-west direction, and molecules located between the two planes are directly forced into a 90 ° twisted state. Due to the fact that light propagates along the direction of molecular arrangement, it must also be twisted 90 ° when passing through liquid crystals. But when we apply a voltage to the liquid crystal, the molecules will rearrange vertically, allowing light to be emitted directly without any twisting.