Abstract: A charging circuit configured to charge a rechargeable battery includes an input unit configured to support forms of connection to an external power supply and to receive electric power supplied from the external power supply; a charge unit configured to supply the rechargeable battery with the electric power supplied from the input unit; a detection unit configured to detect the charge level of the rechargeable battery; and a charge control unit configured to control the charge unit so as to prevent the rechargeable battery from being supplied with the electric power supplied from the input unit supplied with the electric power from the external power supply through one of the forms of connection to the external power supply, in response to the charge level detected by the detection unit exceeding a threshold corresponding to the one of the forms of connection.

Abstract: Information equipment includes an open/close mechanism that opens or closes exhaust ports, a cooling fan that dissipates heat in the information equipment into the air through the exhaust ports, a user state detecting part that detects a contact state in which the hand of a user is in contact with the information equipment or a closeness state in which the hand of the user is close to the information equipment, and a heat dissipation control part that controls an open/closed state of the open/close mechanism so that heat exhausted from the exhaust ports is not directed to the hand of the user that is contact with or close to the information equipment, in accordance with the contact state or the closeness state detected by the user state detecting part.

Abstract: A wireless power transmitting system that transmits power from a power transmitting station to a power receiving station wirelessly includes the power receiving station. The power receiving station includes a unit receiving power from the power transmitting station, a unit obtaining a level of power received through the antenna, a unit obtaining a level of power consumed by the device operating while being supplied with received power and a unit transmitting the received power level and the power consuming level to the power transmitting station wirelessly. The power transmitting station includes a unit receiving the received power level and the power consuming level from the power receiving station wirelessly, a unit controlling the level of power transmitted through the transmitting antenna based on the difference between the received power level and the received power consuming level, and a unit transmitting power to the power receiving station wirelessly.

Abstract: A charging system including: a processor that includes a containing part for selectively containing either one of a secondary battery of a first type and a secondary battery of a second type capable of being rapidly charged with an electrical quantity greater than that of the secondary battery of the first type, and that carries out processing using, as a power source, the secondary battery contained in the containing part; and a feeder for feeding power to the processor so as to charge the secondary battery, wherein the processor includes: a determination part for determining whether or not the contained secondary battery needs to be charged; a battery detection part for detecting the type of the contained secondary battery when it is determined that the secondary battery needs to be charged; and a transmission part for transmitting, to the feeder, a feed instruction.

Abstract: Information equipment includes an open/close mechanism that opens or closes exhaust ports, a cooling fan that dissipates heat in the information equipment into the air through the exhaust ports, a user state detecting part that detects a contact state in which the hand of a user is in contact with the information equipment or a closeness state in which the hand of the user is close to the information equipment, and a heat dissipation control part that controls an open/closed state of the open/close mechanism so that heat exhausted from the exhaust ports is not directed to the hand of the user that is contact with or close to the information equipment, in accordance with the contact state or the closeness state detected by the user state detecting part.

Abstract: A method for controlling the Si concentration in a GaP single crystal layer grown in a series of runs of GaP liquid phase epitaxial growth with the repeated use of one and the same Ga solution, which comprise the steps of: measuring the Si concentrations of the GaP single crystal layers in preceding runs; then determining the additional Si amounts to be added into the Ga solution to refresh the Si effective concentration therein in reference to the Si concentrations in the layers; and adding Si of the thus determined amount into the Ga solution to commence the subsequent run, wherein the Si concentration in each of the GaP liquid phase epitaxial growth layers is determined from measurement of the O/G ratio in the layer, which is computed from each pair of the both values of the photoluminescent spectral peak intensity around the wavelength of 6300 .ANG. (O component) as the numerator and the other photoluminescent spectral peak intensity around the wavelength of 5540 .ANG.

Abstract: A GaP red light emitting diode (LED) which is free from a problem of luminance reduction comprises an n-type GaP epitaxial layer grown on an n-type GaP substrate, and a p-type GaP epitaxial layer grown on the n-type Gap epitaxial layer, wherein the n-type epitaxial layer has an Si concentration of not more than 5.times.10.sup.17 atoms/cc and an S concentration of not more than 1.times.10.sup.18 atoms/cc.