Abstract: An audio amplifier and a warning sound amplifier are connected in parallel to each other, relative to a voice coil of a loudspeaker. A resistor having an impedance greater than an impedance of the voice coil is connected to the voice coil and is also connected to the warning sound amplifier. An audio signal from the warning sound amplifier is input to the voice coil via the resistor. Thus, since the warning sound amplifier is connected to the resistor having the impedance greater than the impedance of the voice coil of the loudspeaker, even in a case where only the audio amplifier is operated, a large current is prevented from flowing into the warning sound amplifier.

Abstract: An electronic component testing device which is able to release heat (radiate heat) efficiently from a self-heating electronic component, and is able to carry out an intended test efficiently while keeping the temperature of the electronic component within a predetermined range higher than ordinary temperature.

Abstract: A voltage equalization device of a power storage device provided with battery packs in which a plurality of secondary cells are connected, power converters provided in association with the battery packs, and controllers that control the power converters, and in which the battery packs are connected in parallel via the individual power converters includes a decision portion and a voltage-adjusting portion. The decision portion obtains battery-pack information regarding the states of charge/discharge of the individual battery packs and decides, for each battery pack, whether or not to perform voltage adjustment on the basis of the battery-pack information. When the decision portion decides that the voltage adjustment is to be performed, the voltage-adjusting portion generates offset instructions for adjusting the states of charge/discharge and outputs the offset instructions to the controllers of the power converters associated with the battery packs.

Abstract: The building of the present invention includes a wall making a boundary of a room, an inner wall formed by a group including first and second tubular structures and arranged on the wall as one body, and an air conditioner arranged in the room. The first tubular structure has a first ventilation hole, where gas blown into the first tubular structure from the air conditioner and passed through the first tubular structure with substantially no leakage is blown out, at a to-be-arranged position of a first storage equipment which is to be arranged in the room. The second tubular structure has a second ventilation hole, where the gas blown into the second tubular structure from the air conditioner and passed through the second tubular structure with substantially no leakage is blown out, at a to-be-arranged position of a second storage equipment which is to be arranged in the room.

Abstract: A voltage equalization device of a power storage device provided with battery packs in which a plurality of secondary cells are connected, power converters provided in association with the battery packs, and controllers that control the power converters, and in which the battery packs are connected in parallel via the individual power converters includes a decision portion and a voltage-adjusting portion. The decision portion obtains battery-pack information regarding the states of charge/discharge of the individual battery packs and decides, for each battery pack, whether or not to perform voltage adjustment on the basis of the battery-pack information. When the decision portion decides that the voltage adjustment is to be performed, the voltage-adjusting portion generates offset instructions for adjusting the states of charge/discharge and outputs the offset instructions to the controllers of the power converters associated with the battery packs.

Abstract: A large screen display comprising an image signal source such as a computer, an original image generator, a light-transmission screen, an on-screen pointing-position detecting means, and a light-pen built in an infra-red-ray emitting modulating means, wherein infra-red rays which are modulated by pressing force generated when the light-pen is pressed against the screen by an operator are emitted and the infrared rays are detected and amplified by an infrared-ray detector and demodulated by a demodulating means and then inputted to the image signal source, so that the tone and thickness of each stroke of a figure to be drawn and displayed can be displayed.

Abstract: A projection-type display device comprises: a display body including an upper cabinet having a screen at a front portion thereof and a lower cabinet having a pair of side frames for supporting the upper cabinet; a projector unit including projectors and mounting device on which the projectors are mounted movable in the forward/backward directions with respect to the lower cabinet; guide device for guiding the projector unit to a predetermined position in the display body when the projector unit is separated from or received into the display body; locating device for locating the projector unit at a predetermined position and securing together the projector unit and the display body to separate one of them from the floor surface; and a device for supporting the other of the projector unit and the display body is grounded on the floor surface, at three positions.