The present disclosure provides a display panel assembly. The display panel assembly includes a display panel and a display switching device on a light outgoing surface of the display panel. The display switching device includes an electrode group and an electrochromic layer. The electrode group includes a first electrode and a second electrode. The first electrode and the second electrode are configured to receive voltage signals such that the electrochromic layer presents one of a transparent state for 2D display, a first pattern for auxiliary 3D display, or a second pattern for glasses-free 3D display.