A dynamic random access memory is provided that has separate array and peripheral power busing to isolate array noise from peripheral circuits such as delay lock loops during row activations and readwrite memory operations. The system includes a connector arranged on an end of a flexible cable for receiving an end of the flexible elongate member. While the photographing optical system is driven, the focus detector determines whether the image-formed surface surpasses a focused-position corresponding to a position of the light-receiving surface, on the basis of a decreasing-amount of the difference value. The white ink layer is formed on the adhesive layer.