Grid and three-dimensional display device as well as manufacturing methods of grid and three-dimensional display device

The invention belongs to the field of a three-dimensional display technology, and provides a grid, a manufacturing method of the grid, a three-dimensional display device and the three-dimensional display device of the three-dimensional display device. The grid comprises first transparent elements and second transparent elements, wherein the first transparent elements are of cylindrical lens shapes, the first transparent elements are arranged along a first direction, the second transparent elements are of cylindrical lens shapes, and the first transparent elements are arranged along a second direction; an angle is formed between the first direction and the second direction, and the first transparent elements are used for diffusing light rays transmitted by the second transparent elements. The invention further provides the manufacturing method of the grid, the three-dimensional display device and the manufacturing method of the three-dimensional display device. The grid provided by the invention has the advantages that the granular sensation of a display screen can be reduced when the display screen is used for the three-dimensional display, and the display definition of the three-dimensional display device can be improved.