Systems and methods are disclose for facilitating the transfer of hierarchical data to a computer memory are provided. The lamp has primary and secondary elliptical-shaped reflectors, forming an elliptical space therebetween with the fibers in the vicinity of one focal point of the elliptical space, on the major axis of the elliptical space. Switching elements provided in the pixel regions are electrically connected to the signal lines and the gate lines. When viewed from above, the buffer saddle is movable in a direction separating from the main saddle that is a reverse direction to the center-folder, and in a direction orthogonal to the direction separating from the main saddle. At least one of solid active materials for constituting the positive electrode and the negative electrode is composed of a mixed oxygen ion and electron conductor capable of inserting and eliminating oxygen ion or absorbing and releasing oxygen.