Abstract: Disclosed herein is a wireless power receiving device that wirelessly receives power transmitted from a wireless power transmitting device. The wireless power receiving device comprises: a power receiving coil that receives an AC power through a magnetic field; a power-receiving-side capacitor that constitutes a resonance circuit together with the power receiving coil; a rectifying circuit that rectifies the AC power received by the power receiving coil by a plurality of bridge-connected semiconductor devices each having a rectifying function; and a short-circuit detection circuit that detects a short circuit in the rectifying circuit based on a first AC voltage which is a voltage between a one-side input line of the rectifying circuit and a stable potential and a second AC voltage which is a voltage between the other-side input line of the rectifying circuit and the stable potential.

Abstract: A wireless power transmission device, configured to transmit AC power to a power receiving coil of a wireless power reception, and that can curb an increase in production costs and curb destabilization of the power which is received by a wireless power reception device with a decrease in quality of wireless communication includes: power transmitting coil that is magnetically coupled to the power receiving coil; power transmitting circuit that is configured to supply an AC voltage to the power transmitting coil; transmission-side communication unit that is configured to perform wireless communication with the wireless power reception device; measuring unit that is configured to measure a characteristic value of the wireless communication; and control circuit that is configured to control the AC voltage which is supplied from the power transmitting circuit to the power transmitting coil on the basis of the characteristic value measured by the measuring unit.

Abstract: Disclosed herein is a wireless power receiving device that wirelessly receives power transmitted from a wireless power transmitting device. The wireless power receiving device comprises: a power receiving coil that receives an AC power through a magnetic field; a power-receiving-side capacitor that constitutes a resonance circuit together with the power receiving coil; a rectifying circuit that rectifies the AC power received by the power receiving coil by a plurality of bridge-connected semiconductor devices each having a rectifying function; and a short-circuit detection circuit that detects a short circuit in the rectifying circuit based on a first AC voltage which is a voltage between a one-side input line of the rectifying circuit and a stable potential and a second AC voltage which is a voltage between the other-side input line of the rectifying circuit and the stable potential.

Abstract: A lighting apparatus for irradiating a liquid crystal display panel from the back includes a light guiding plate having at least an end which is bent in a direction opposite to the liquid crystal display panel, and a light source disposed on the back surface of the light guiding plate with respect to the liquid crystal display panel. Light from the light source is incident on the bent section of the light guiding plate, reflected by a reflector covering the outside surface of the bent section, and then falls on a section corresponding to a data display space of the liquid crystal display panel. This structure enables an increase in the ratio of the area of a light emitting section to the area of the entire lighting apparatus.

Abstract: In a plain light source device used for backlighting a light transmission type liquid crystal display, a reflector for reflecting the light from the light source toward the liquid crystal panel is provided which is formed from a conductive resin (plastic) consisting of a resinous (plastic) material with a metal fiber mixed therein. The thus formed reflector is an insulator at its surfaces and a conductor inside. A board on which the light source is supported is electrically and mechanically connected to the reflector for grounding. The reflector thereby serves as a shield against the noise generated by the light source. Further, a transparent conductive sheet is disposed on the front side (on the display panel side) of the light source. The conductive sheet is electrically connected to the board for grounding. As a result, the light source is surrounded by the reflector and the tranparent conductive sheet, both grounded, thus providing further reliable shielding.