Display unit, driving method thereof, and display device

A display unit, comprising:

• a first chamber;
• a second chamber, spatially connected to the first chamber to thereby form a continuous internal space with the first chamber;
• and
• a working fluid, disposed in the continuous internal space;
• wherein:
• the first chamber comprises a transparent substrate and an opposing substrate having an opposing surface oppositely aligned with the transparent substrate;
• the working fluid is configured to adjustably flow into the first chamber and cover the opposing surface, or to flow out of the first chamber and expose the opposing surface, to thereby allow the display unit to realize one or another of a first-state display and a second-state display;
• and
• the working fluid comprises one of:
• a solution comprising Color Index (C.I.) Direct Blue 199 with a mass fraction of about 3%, glycerol with a mass fraction of about 5%, triethanolamine with a mass fraction of about 0.7%;
• a solution comprising Color Index (C.I.) reactive red 23 with a mass fraction of about 2%, glycerol with a mass fraction of about 5%, triethanolamine with a mass fraction of about 1.5%;
• a solution comprising Color Index (C.I.) reactive yellow 37 with a mass fraction of about 5%, glycerol with a mass fraction of about 5%, triethanolamine with a mass fraction of about 0.7%;
• or
• a solution comprising Color Index (C.I.) solubilised sulphur black 1 with a mass fraction of about 20%, glycerol with a mass fraction of about 5%.