An array substrate, a method for manufacturing the same, a liquid crystal display panel, and a display device are provided. The array substrate includes a first substrate, signal lines and an insulating layer; the insulating layer is disposed on the first substrate, and grooves are disposed on a side of the insulating layer facing away from the first substrate and disposed in a region of the insulating layer corresponding to a non-display region of the array substrate; and the signal lines are disposed on inner walls of the grooves, a direction of the inner walls of the grooves is arranged such that at least a portion of light incident on the signal lines from a side of the first substrate facing away from the signal lines is reflected to a display region of the array substrate.