Optical grating display screen

The utility model discloses an optical grating display screen which comprises a square frame, multiple LED light bars, a mask and a control box. The mask is arranged on the front face of the square frame, the LED light bars are evenly arranged in the square frame, and waterproof PG heads are arranged at the centers of the back faces of the LED light bars; the control box is arranged on the back face of the square frame, multiple connectors are arranged on one side of the control box, and the other end of each waterproof PG head is connected with the corresponding connector on the control box. An authentication device is arranged in the control box. The optical grating display screen has no color cast, and is high in safety.