The invention provides an array substrate and a display device, and helps to solve the problem of the prior art that the I-V curve of a film transistor shifts since an oxide active layer is irradiated by light. A light absorption layer, arranged above an oxide active layer of a film transistor, is adopted to prevent the oxide active layer from being irradiated by light, so the I-V curve of the film transistor will not shift. Therefore, the problem about the light stability of the oxide semiconductor film transistor is solved.