Diffraction optical waveguide with gratings arranged in partition mode and near-to-eye display device

The utility model discloses a diffraction optical waveguide with gratings arranged in a partitioned manner and a near-to-eye display device, and the diffraction optical waveguide with the gratings arranged in the partitioned manner comprises a waveguide substrate which comprises a coupled-in grating region and a coupled-out grating region; the coupling-out grating area comprises at least one first coupling-out subarea and a second coupling-out subarea, and the second coupling-out subarea is located on the side, away from the coupling-in grating area, of the first coupling-out subarea. The first grating array and the second grating array are at least located on the surface of one side of the waveguide substrate; the first grating array is located in the first coupling-out subarea, and the second grating array is located in the second coupling-out subarea; the emergent efficiency of the second grating array in the second coupling-out partition is higher than the emergent efficiency of the first grating array in