An array substrate, a display panel and a detection method are provided. The array substrate includes a plurality of display pixels and at least one detection element. When an aging process is performed on the plurality of display pixels, a first driving signal is applied on the at least one detection element and the at least one detection element changes from a first state to a second state, wherein the second state is different from the first state. The second state of the at least one detection element indicates that the plurality of display pixels has undergone the aging process.