Method of fabricating array substrate, array substrate and display device

A display device comprising:

• a display area;
• and
• a wiring area,
• wherein the display area is provided with a first thin film transistor and a second thin film transistor, the first thin film transistor comprises an oxide thin film transistor, and the second thin film transistor comprises a low temperature poly-silicon thin film transistor,
• wherein a distance between a first active layer of the first thin film transistor and a substrate is different from a distance between a second active layer of the second thin film transistor and the substrate,
• wherein a first source/drain of the first thin film transistor is electrically connected to the first active layer through first vias, a second source/drain of the second thin film transistor is electrically connected to the second active layer through second vias, and
• wherein the wiring area is provided with a groove, the groove comprises a first sub-groove and a second sub-groove that are stacked, the first sub-groove and the first vias are formed by a same first process, and the second sub-groove and the second vias are formed by a same second process.

A display device comprising

• a display area;
• and
• a wiring area,
• wherein the display area is provided with a first thin film transistor and a second thin film transistor, the first thin film transistor comprises an oxide thin film transistor, and the second thin film transistor comprises a low temperature poly-silicon thin film transistor,
• wherein a distance between a first active layer of the first thin film transistor and a substrate is different from a distance between a second active layer of the second thin film transistor and the substrate,
• wherein a first source/drain of the first thin film transistor is electrically connected to the first active layer through first vias, a second source/drain of the second thin film transistor is electrically connected to the second active layer through second vias,
• wherein the wiring area is provided with a groove, the groove comprises a first sub-groove and a second sub-groove that are stacked, and
• wherein the display device further comprises a first connection line, and an electrode of the first source/drain is electrically connected to an electrode of the second source/drain through the first connection line.