The orientation film is an important part of the LCD layer of the display, and its role is to provide an orderly arrangement of the liquid crystal molecules to achieve the orientation of the liquid crystal, so as to control the light transmission or blocking, forming a visible image.

The oriented film is usually made of a polymer material, and after special coating and treatment, the surface will form tiny grooves. These grooves are treated by friction (such as rubbing on the surface of the film with a flannel) to form micron-scale directivity, which causes the liquid crystal molecules to line up in a specific direction. When the electric field is applied to the liquid crystal layer, the orientation of the liquid crystal molecules will change, and then adjust the polarization state of the light to achieve the display function.

The quality of the oriented film directly affects the performance of the display, such as brightness, contrast, and viewing Angle stability. Different display technologies (such as LCD, OLED) have different requirements for oriented films, so continuous improvement of oriented film materials and processes is an important direction to improve the display effect.