Patent ID: 8508833

Claim:
A pixel unit of an electrochromic display panel, comprising: a first substrate; a first electrode, on the first substrate; a second electrode, on the first substrate and electrically insulated from the first electrode; a first auxiliary counter electrode, on the first substrate and disposed between the first electrode and the second electrode; a first electrochromic material, on the first electrode; a second electrochromic material, on the second electrode; a second substrate, opposite to the first substrate; a third electrode, on the second substrate; a third electrochromic material, on the third electrode; and an electrolyte layer, between the first substrate and the second substrate, wherein the first electrode, the second electrode, the third electrode, and the first auxiliary counter electrode are driven by different voltages, and the first auxiliary counter electrode controls current directions between the first electrode, the second electrode, the third electrode, and the first auxiliary counter electrode, such that the pixel unit displays a plurality of colors.