The invention relates to a display device which comprises a display panel, a lens component and a liquid crystal box, wherein the liquid crystal box is used for realizing the conversion between a 2D image and a 3D image; an electrode lead array, an active switch array, a first electrode unit array and an aligning layer are arranged on the surface of a first transparent substrate of the liquid crystal box close to a liquid crystal layer; the first electrode unit array comprises a plurality of first electrode units arranged in a separated form; the active switch array comprises a plurality of active switches which are connected with the electrode lead array and are respectively connected with the first electrode units; the liquid crystals corresponding to the first electrode units are under first state or second state under the actions of the active switches; and for the incidence polarized light with a polarization direction parallel to a friction direction of an incidence transparent substrate, the polarization direction of the emergent light under the first state is turned for 90 degrees and the polarization direction of the emergent light under the second state is unchanged. The display device can be used for realizing the plane or stereo display control on any pixel point.