Light emitting diode device, array substrate and display device

A display device comprising an array substrate, the array substrate comprising a base substrate, and a plurality of pixels disposed on the base substrate,

• wherein each pixel comprises a light emitting diode device,
• wherein the light emitting diode device comprises a first sub-light emitting unit, and a second sub-light emitting unit disposed on a side of the first sub-light emitting unit close to the base substrate,
• wherein the first sub-light emitting unit comprises:
• a first semiconductor layer of a first conductivity type,
• a first light emitting layer, and
• a second semiconductor layer of a second conductivity type;
• wherein each layer of the first sub-light emitting unit is disposed successively in a direction towards the base substrate,
• wherein the second sub-light emitting unit comprises:
• the second semiconductor layer,
• a second light emitting layer, and
• a third semiconductor layer of the first conductivity type;
• wherein each layer of the second sub-light emitting unit is disposed successively in the direction towards the base substrate;
• and
• wherein the first conductivity type being different from the second conductivity type,
• wherein the light emitting diode device further comprises:
• a first electrode,
• a second electrode, and
• a third electrode,
• wherein the first electrode is configured to be electrically connected to the first semiconductor layer,
• wherein the first semiconductor layer includes a first overlapping region and a first exposed region, the first light emitting layer and the second semiconductor layer being disposed in the first overlapping region,
• wherein the first electrode is disposed in the first exposed region,
• wherein the second electrode is configured to be electrically connected to the second semiconductor layer, the second semiconductor layer including a second overlapping region and a second exposed region, the second light emitting layer and the third semiconductor layer being disposed in the second overlapping region,
• wherein the second electrode is disposed in the second exposed region,
• wherein the third electrode is configured to be electrically connected to the third semiconductor layer, and
• the array substrate further comprises:
• a first contact electrode, the first contact electrode being directly on the base substrate, disposed on a side of the base substrate close to the light emitting diode device, and in contact with the first electrode;
• a second contact electrode, the second contact electrode being directly on the base substrate, disposed on the side of the base substrate close to the light emitting diode device, and in contact with the second electrode;
• and
• a third contact electrode, the third contact electrode being directly on the base substrate, disposed on the side of the base substrate close to the light emitting diode device, and in contact with the third electrode.