Abstract: Aspects of the disclosure relate to making it easy to move a power supply device having a large capacity battery. A power supply device includes a carriage, an inverter, a battery and a battery mounting portion. The carriage has wheels. The inverter is supported by the carriage. The battery has a power output terminal at the lower part thereof. The battery mounting portion has a power input terminal which is connected to the inverter and contacts with the output terminal when the battery is mounted. The battery can be mounted and detached by moving vertically.

Abstract: A power supply device and a power supply control method with which charging and electric power supply can be continued efficiently, and a charge capacity can be added is disclosed. A power supply device including: plural battery units replaceably connected to a battery connection part, an output unit for outputting electric power from the battery unit to a load, and a control unit for controlling connection of the plural battery units with respect to the output unit, wherein the control unit selects a battery unit having a remaining charge amount that is smallest among the plural battery units and equal to or greater than a first predetermined amount, and connects the selected battery unit to the output unit.

Abstract: To provide a power supply device and a power supply control method with which charging and electric power supply can be continued efficiently, and a charge capacity can be added. A power supply device including: plural battery units replaceably connected to a battery connection part, an output unit for outputting electric power from the battery unit to a load, and a control unit for controlling connection of the plural battery units with respect to the output unit, wherein the control unit selects a battery unit having a remaining charge amount that is smallest among the plural battery units and equal to or greater than a first predetermined amount, and connects the selected battery unit to the output unit.

Abstract: A charging device is provided, which is capable of starting up a control circuit without any separate power supply so as to start an appropriate charge operation even when a secondary battery is in an overdischarged state. A charging device to charge a secondary battery with electric power generated by a solar cell includes: a charging control unit that controls the electric power generated by the solar cell to have a current value and/or a voltage value suitable for charging, and that supplies the controlled electric power to the secondary battery; and a start-up control unit that supplies, to the charging control unit, a boosted power source by boosting the electric power from the solar cell when charging is started, and that starts up the a charging control unit.

Abstract: Aspects of the disclosure relate to making it easy to move a power supply device having a large capacity battery. A power supply device includes a carriage, an inverter, a battery and a battery mounting portion. The carriage has wheels. The inverter is supported by the carriage. The battery has a power output terminal at the lower part thereof. The battery mounting portion has a power input terminal which is connected to the inverter and contacts with the output terminal when the battery is mounted. The battery can be mounted and detached by moving vertically.

Abstract: A charging device is provided, which is capable of starting up a control circuit without any separate power supply so as to start an appropriate charge operation even when a secondary battery is in an overdischarged state. A charging device to charge a secondary battery with electric power generated by a solar cell includes: a charging control unit that controls the electric power generated by the solar cell to have a current value and/or a voltage value suitable for charging, and that supplies the controlled electric power to the secondary battery; and a start-up control unit that supplies, to the charging control unit, a boosted power source by boosting the electric power from the solar cell when charging is started, and that starts up the a charging control unit.

Abstract: An illuminating device of the invention is an illuminating device which can eliminate an illumination in an unnecessary direction, and selectively illuminate a necessary desired area.

Abstract: An illuminating device of the invention is an illuminating device which can eliminate an illumination in an unnecessary direction, and selectively illuminate a necessary desired area.

Abstract: An illuminating panel has disposed thereon a plurality of linear light source units, and the linear light source units each include: a light emitter having a plurality of light emitting diodes linearly installed on a base; a first reflector formed of parabolic surfaces which are provided on a light emergence side of the light emitter in such a way as to correspond to the plurality of light emitting diodes, and light emitting faces of which fall in focal positions; and a second reflector having a pair of flat plate-like reflecting surfaces which, being arranged with the light emitting diodes sandwiched therebetween, farther to the light emergence side than the first reflector and parallel to an array direction of the light emitting diodes, reflect light from the light emitting diodes toward the light emergence side, wherein the linear light source units are annularly disposed on a module panel.

Abstract: To provide an illumination apparatus by which an illumination region having a constant flat illuminance distribution is obtained at high illuminance while electric power is saved and which can extend the irradiation distance, and an illumination apparatus including the illumination unit.

Abstract: The invention has an object of obtaining an illuminating panel by which an illuminated area having a high illuminance and a stable flat illuminance distribution can be formed with a long irradiation distance while power is being saved.

Abstract: An optical connector is disclosed which comprises a polarization-maintaining optical fiber inserted into an oval hole in a ferrule and fixed in the hole by an adhesive. The major axis of the oval hole coincides with the direction in which stress is applied to the polarization-maintaining optical fiber and the minor axis of the hole is approximately equal to the diameter of the polarization-maintaining optical fiber.