Array substrate, liquid crystal display panel and liquid crystal display device

The invention discloses an array substrate, a liquid crystal display panel and a liquid crystal display device. The width of a grid electrode is designed to be smaller than that of an active layer of a thin film transistor and larger than that of a channel of the thin film transistor. By reducing the width of the grid electrode, the overlapping area between a source electrode and drain electrode and the grid electrode is reduced, and then stray capacitance between the source electrode and drain electrode and the grid electrode is reduced and display quality is improved.