Electroluminescent device, manufacturing method and driving method thereof, and display device

An electroluminescent device, comprising:

• a transparent substrate;
• a first light emitting unit and a second light emitting unit disposed at both sides of the transparent substrate, respectively, wherein the first light emitting unit and the second light emitting unit have a same light output direction and are connected to two control circuits, respectively, and the transparent substrate has a refractive index adapted to light emitting materials of the first light emitting unit and the second light emitting unit,
• the first light emitting unit is a bottom emitting type light emitting unit, and the second light emitting unit is a top emitting type light emitting unit;
• the first light emitting unit comprises a first transparent anode, a first light emitting layer and a total reflection cathode sequentially arranged from one side close to the transparent substrate to the other side away from the transparent substrate;
• the second light emitting unit comprises a second transparent anode, a second light emitting layer and a transparent cathode sequentially arranged from one side close to the transparent substrate to the other side away from the transparent substrate;
• and
• the first transparent anode and the second transparent anode are directly electrically connected to each other.