Display device

The invention discloses a display device to solve the problems that an anti-peeping display device in the prior art is large in visual angle, large in thickness and wide in frame. The display device comprises a first substrate, a second substrate, a liquid crystal layer and an electrode structure set, wherein the first substrate and the second substrate are oppositely arranged, and the liquid crystal layer and the electrode structure set are located between the first substrate and the second substrate; one side, facing the liquid crystal layer, of the first substrate is provided with a plurality of collimated light-emitting structures which are distributed in an array; a plurality of concave-convex structures are arranged on one side, facing the liquid crystal layer, of the second substrate; the liquid crystal layer has a birefringence, and is configured to enable the refractive index to be the same as that of the concave-convex structures when the voltage difference generated by the electrode structure group