Display panel, manufacturing method thereof and display device

A method for manufacturing a display panel, comprising:

• providing a first substrate;
• forming an electrochromic layer on the first substrate;
• forming a spacer layer on the first substrate on which the electrochromic layer is formed, forming an electrochromic control electrode between the spacer layer and the first substrate;
• and
• providing a second substrate, cell-assembling the first substrate and the second substrate, and forming a liquid crystal layer between the first substrate and the second substrate, wherein
• the spacer layer is disposed between the liquid crystal layer and the electrochromic layer,
• wherein under a condition that a dark-state display of the display panel, the electrochromic layer absorbs light incident into the display panel and prevents the light leakage of the display panel and improves a contrast of the display images of the display panel;
• the electrochromic control electrode is configured to control and electrical field applied to the electrochromic layer;
• a plurality of pixel units, defined by a plurality of gate lines and a plurality of data lines;
• and
• a switching thin film transistor, disposed on the first substrate and configured to drive the pixel units to display an image,
• wherein the electrochromic layer includes a plurality of electrochromic units, each of the plurality of pixel units is provided with at least one of the plurality of electrochromic units,
• in each of the plurality of pixel units, the electrochromic control electrode includes a first electrode and a second electrode, and the electrochromic unit is disposed between the first electrode and the second electrode,
• the electrochromic layer and the switching thin film transistor are disposed at an identical side of the liquid crystal layer, and the electrochromic layer is disposed between the first substrate and the switching thin film transistor.