Redundant capacity in a memory system is utilized to facilitate active monitoring of solid state memory devices in the memory system. The back cover includes at least one reflection surface arranged on one surface of the back cover. At least one scribe line region is defined over the semiconductor wafer, separating the semiconductor wafer with at least two active regions thereover. The data signals transferred by the data lines of the first data line group include a plurality of pulse transitions while the display panel displays an image. A virtual periodically-updated newscast can be similarly generated.