An array substrate, comprising: a base substrate, comprising a display region and a peripheral region at the periphery of the display region; a planarization layer on the base substrate; a package layer at a side of the planarization layer away from the base substrate; a first barrier wall in the peripheral region and comprising a first barrier wall portion extending along a first direction; and a plurality of first transmission lines in the peripheral region and at a side of the package layer away from the base substrate, each of the plurality of first transmission lines extending along the first direction and arranged along a second direction which is substantially perpendicular to the first direction, wherein the package layer comprises an organic package layer, the planarization layer comprises a first edge portion extending along the first direction, the first edge portion is located between the first barrier wall portion and the display region, an orthographic projection of the first edge portion on the base substrate is covered by an orthographic projection of the organic package layer on the base substrate, and an orthographic projection of at least one of the plurality of first transmission lines on the base substrate is located at a side of the orthographic projection of the first edge portion on the base substrate away from the display region, wherein the organic package layer comprises a second edge portion extending along the first direction, and the second edge portion is located between the first edge portion and the first barrier wall portion, and an orthographic projection of at least one of the plurality of first transmission lines on the base substrate is located within an orthographic projection of the second edge portion on the base substrate, characterized in that the plurality of first transmission lines comprise a plurality of first flat transmission lines at a side of the first edge portion away from the base substrate and a plurality of first slope transmission lines at a side of the second edge portion away from the base substrate, a distance between two adjacent ones of the plurality of first slope transmission lines is larger than a distance between two adjacent ones of the plurality of first flat transmission lines. a base substrate, comprising a display region and a peripheral region at the periphery of the display region; a planarization layer on the base substrate; a package layer at a side of the planarization layer away from the base substrate; a first barrier wall in the peripheral region and comprising a first barrier wall portion extending along a first direction; and a plurality of first transmission lines in the peripheral region and at a side of the package layer away from the base substrate, each of the plurality of first transmission lines extending along the first direction and arranged along a second direction which is substantially perpendicular to the first direction, wherein the package layer comprises an organic package layer, the planarization layer comprises a first edge portion extending along the first direction, the first edge portion is located between the first barrier wall portion and the display region, an orthographic projection of the first edge portion on the base substrate is covered by an orthographic projection of the organic package layer on the base substrate, and an orthographic projection of at least one of the plurality of first transmission lines on the base substrate is located at a side of the orthographic projection of the first edge portion on the base substrate away from the display region, wherein the organic package layer comprises a second edge portion extending along the first direction, and the second edge portion is located between the first edge portion and the first barrier wall portion, and an orthographic projection of at least one of the plurality of first transmission lines on the base substrate is located within an orthographic projection of the second edge portion on the base substrate, characterized in that the plurality of first transmission lines comprise a plurality of first flat transmission lines at a side of the first edge portion away from the base substrate and a plurality of first slope transmission lines at a side of the second edge portion away from the base substrate, a distance between two adjacent ones of the plurality of first slope transmission lines is larger than a distance between two adjacent ones of the plurality of first flat transmission lines.