A memory circuit includes at least one memory cell for storing a charge representative of a datum. The drainage channel is formed by a drainage pipe which is arranged in a longitudinal groove of the tube shaft which is provided on an outer side of the tube shaft. The stool ergonomically supports the body while also achieving structural integrity through a simple organic form that can be produced inexpensively using minimal material. A pixel electrode is positioned on the first substrate and positioned in one pixel of the plurality of pixels.