ELECTROCHROMIC GRATING, DISPLAY PANEL, AND DISPLAY DEVICE

摘要

An electrochromic grating, a display panel, and a display device. The electrochromic grating comprises: in a stacked arrangement, a cathode (100), a first electrochromic layer (200), an ion-conducting layer (300), a second electrochromic layer (400), and an anode (500). Under effects of a same electric field, the material of the first electrochromic layer (200) and that of the second electrochromic layer (400) have opposite light-transmitting properties in an oxidized state, the material of the first electrochromic layer (200) and that of the second electrochromic layer (400) have opposite light-transmitting properties in a reduced state, that is, the material of the first electrochromic layer (200) is in a dark state while in the oxidized state, and the material of the second electrochromic layer (400) is in a dark state while in the reduced state, alternatively, the material of the first electrochromic layer (200) is in a dark state while in the reduced state, and the material of the second electrochromic layer (400) is in a dark state while in the oxidized state. Because, when the material of the first electrochromic layer (200) and that of the second electrochromic layer (400) are in the opposing oxidized state or reduced state, the first electrochromic layer (200) and the second electrochromic layer (400) can concurrently be in the dark state, thus allowing the electrochromic grating to implement ultra-low permeability, further implementing increased contrast, and enhancing display effects.