1. A display device, comprising: a display panel, comprising: an array substrate comprising a plurality of gate lines, a plurality of data lines and a plurality of sub-pixel units each defined by adjacent gate lines and adjacent data lines, wherein the sub-pixel units are classified into first type of sub-pixel units for displaying an original image and second type of sub-pixel units for displaying an interference image, and a pixel unit is composed of a plurality of adjacent first type of sub-pixel units and a plurality of adjacent second type of sub-pixel units; and a cell substrate, the outermost side of the cell substrate being provided with a FPR film array, the FPR film array comprising: first FPR films corresponding to the first type of sub-pixel units so as to convert emitting light of the original image of the first type of sub-pixel units into polarized light in a first direction; and a second FPR film corresponding to the second type of sub-pixel units so as to convert emitting light of the interference image of the second type of sub-pixel units into polarized light in a second direction different from the first direction; and a signal process unit, comprising: a system board configured to input date signal of an original image; an image process unit configured to mix date signal of an interference image with data signal of the original image so as to output a mixed signal, wherein anti-color image signal of the image signal of the original image is used as the image data signal of the interference image, the largest gray value of an image is 255, and when the gray value of the original image displayed by the first type of sub-pixel units is set as X, the gray value of the interference image displayed by the second type of sub-pixel units is set as (255-X), and a time-controller configured to process the mixed signal and then output source driving signal to a source driver IC and gate driving signal to a gate driver IC, respectively.