The present disclosure provides a sub-pixel unit and a method of controlling the same, a pixel unit, an array substrate, and a display device. In one embodiment, a sub-pixel unit includes: at least two subpixels. Each of the at least two subpixels includes: a first electrode; a second electrode; and a liquid crystal layer controlled by a voltage between the first electrode and the second electrode; at least one of the first electrode and the second electrode is a slit electrode. The two subpixels have different initial twist angles, and the initial twist angle is an included angle between a direction of a slit of the slit electrode and a direction where major axes of liquid crystal molecules are oriented when the liquid crystal layer is in an unpowered state, in the respective subpixel.