Light-emitting diode chip, display panel and preparation method thereof and display device

The invention provides a light-emitting diode chip, a display panel and a preparation method thereof and a display device, relates to the technical field of display, and can realize multi-picture display. The light-emitting diode chip comprises a light-emitting diode chip body and a dimming structure arranged on the light emitting side of the light-emitting diode chip body. The dimming structure comprises a first sub dimming structure, and the first sub dimming structure comprises a first electrode layer, an electrochromic layer and a second electrode layer which are sequentially stacked, wherein the electrochromic layer comprises at least two electrochromic patterns, the second electrode layer comprises at least two second electrodes, and one electrochromic pattern corresponds to one second electrode. The electrochromic patterns can be switched between a transparent state and a non-transparent state under the action of the electric field generated by the first electrode layer and thesecond electrodes.