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: The present invention is to provide a resin-forming mold having high releasability and permitting a production without increasing production costs. The resin-forming mold can be used to produce a resin-molded product having minute uneven portions on a front face thereof, such as a surface light source device-use light guide for a liquid crystal display, an aspherical micro-lens, micro-Fresnel lens and an optical disk. In the stamper (resin-forming mold) 10 provided with an electroformed layer 11 and a conductive film 12 formed on the electroformed layer 11, the front face layer 12c of the conductive film 12 is formed of aluminum and a back face 12d is formed of nickel as an electroconductive metal. In addition, the constituent composition of the aluminum and the nickel continuously changes from the front face 12c toward the back face 12d. The front face 12c may be formed of aluminum and oxygen. The aluminum may combine with the oxygen to form an oxide of aluminum.

Abstract: The present invention is to provide a resin-forming mold having high releasability and permitting a production without increasing production costs. The resin-forming mold can be used to produce a resin-molded product having minute uneven portions on a front face thereof, such as a surface light source device-use light guide for a liquid crystal display, an aspherical micro-lens, micro-Fresnel lens and an optical disk. In the stamper (resin-forming mold) 10 provided with an electroformed layer 11 and a conductive film 12 formed on the electroformed layer 11, the front face layer 12c of the conductive film 12 is formed of aluminum and a back face 12d is formed of nickel as an electroconductive metal. In addition, the constituent composition of the aluminum and the nickel continuously changes from the front face 12c toward the back face 12d. The front face 12c may be formed of aluminum and oxygen. The aluminum may combine with the oxygen to form an oxide of aluminum.