Display substrate having electrochromic structure with changeable transmittance, display apparatus and display method therefor

A display substrate, comprising:

• a base substrate;
• a plurality of pixel units on the base substrate;
• and
• an electrochromic structure on a side of the plurality of pixel units facing away from the base substrate;
• wherein when the display substrate is in a mirror state, transmittance of the electrochromic structure is in an initialization state with a preset value;
• when the display substrate is in a display state, the transmittance of the electrochromic structure is positively correlated with brightness of the plurality of pixel units when displaying an image;
• the electrochromic structure comprises a plurality of electrochromic units;
• the plurality of pixel units are in one-to-one correspondence to the plurality of electrochromic units;
• transmittance of each electrochromic unit is positively correlated with brightness of a pixel unit, corresponding to the each electrochromic unit, when displaying the image;
• the electrochromic unit comprises:
• a first electrode and a second electrode arranged sequentially facing away from the base substrate;
• and an electrochromic film arranged between the first electrode and the second electrode;
• the electrochromic film comprises:
• an ion layer, an electrochromic layer, and an electrolyte layer, arranged sequentially facing away from the base substrate.