Abstract: In an electric power device and a method for controlling the same, a first circuit is electrically connected to a first battery tray and a second battery tray, a second circuit is electrically connected to the first battery tray, and a third circuit is electrically connected to the second battery tray. Between the first circuit and the second circuit, a first resistor unit is connected in series with the first battery tray, and a first interrupting unit is connected in parallel with the first resistor unit. Between the first circuit and the third circuit, a second resistor unit is connected in series with the second battery tray, and a second interrupting unit is connected in parallel with the second resistor unit.

Abstract: An ornamental display 1 includes a plate-like transparent material 11 having a surface on which a light collecting element pattern 111 is formed, wherein the light collecting element pattern 111 is formed by a plurality of convex lens-shaped light collecting elements 111a arranged two-dimensionally at a predetermined array pitch p with a directional arrangement, and a non-transparent sheet-like through-hole filter 12 having a through-hole pattern formed by a plurality of through-holes 121a arranged two-dimensionally with the same directional arrangement 121 as the directional arrangement of the light collecting element pattern 111 at an array pitch q. In this ornamental display, the transparent material 111 and the through-hole filter 121 are arranged in a manner such that the light collecting element pattern 111 and the through-hole pattern 121 face each other with a predetermined distance d therebetween.

Abstract: An ornamental display capable of improving the three-dimensionality of an enlarged virtual image group is provided. In the ornamental display 1, an image element pattern 20 constituted by two-dimensionally arranging a plurality of image elements 21 on a back surface of a transparent material 10 such as an acrylic board using transparent ink, and a light collecting element pattern 30 constituted by two-dimensionally arranging a plurality of convex lens-shaped light collecting elements 31 on the surface of the transparent material 10 are formed. The ornamental display 1 is characterized in that the light collecting element pattern 30 is formed so that the array pitch of the adjacent light collecting elements 31 gradually and continuously changes, thereby displaying an enlarged image of image elements 21 above the transparent material 10 while gradually and continuously changing the height thereof, constituting a three-dimensional enlarged virtual image group Z1 having a curved surface as a whole.