A disposable plate or tray includes a substantially planar bottom portion, a sidewall and a flange. This system senses the primary status of the power supply through a low voltage power tap connector which is plugged in any appropriate socket of the primary device. Each of the display units is respectively located between two adjacent data lines and respectively includes a first pixel and a second pixel, wherein the first pixel is electrically connected to one of the first scan lines, the second pixel is electrically connected to one of the second scan lines, and the first and second pixels are respectively electrically connected to a different data line. The inner member and the outer member may be configured so that an implantable medical endoprosthesis can be disposed therebetween.