The invention discloses a display device and virtual reality glasses, and relates to the display technology field. The technology problem of the display device of low light utilization rate is solved. The display device comprises an array substrate, which comprises a substrate, a plurality of sub-pixels, and a grating. The grating comprises a plurality of sub-gratings, which comprise adjusting parts used to adjust a transmission direction of light. The array substrate is divided into a plurality of preset areas, and the sub-gratings having different structures are corresponding to the sub-pixels disposed in the different preset areas. The display device also comprises a light source disposed on the side of the substrate, and the light emitted by the light source is parallel light. The light is reflected totally in the array substrate expect the areas of the adjusting parts of the sub-gratings. In the areas of the adjusting parts of the sub-gratings, the light emitted by the adjusting parts of the sub-gratings having the different structures is converged to human eyes in front of the display device. The display device is used for the virtual reality glasses.