Abstract: An LED lighting unit, and a vehicle lamp using the LED lighting unit can have a favorable light distribution that can be perceived as a single, integrated lighting surface. The LED lighting unit can include a plurality of base boards, a plurality of LED light sources located on each mounting surface of the base boards, a plurality of parabolic reflectors and at least one V-shaped reflector configured to locate between the adjacent parabolic reflectors. Because each of the LED light sources is located substantially at each focus of the parabolic reflectors and the at least one V-shaped reflector, light emitted from the LED light sources can be illuminated as a single, integrated light via their reflectors. Thus, a vehicle lamp using the LED lighting unit can have a favorable light distribution that can be perceived as a single, integrated lighting surface and which can be used for a headlight, a tail lamp, etc.

Abstract: An LED lighting unit, and a vehicle lamp using the LED lighting unit can have a favorable light distribution that can be perceived as a single, integrated lighting surface. The LED lighting unit can include a plurality of base boards, a plurality of LED light sources located on each mounting surface of the base boards, a plurality of parabolic reflectors and at least one V-shaped reflector configured to locate between the adjacent parabolic reflectors. Because each of the LED light sources is located substantially at each focus of the parabolic reflectors and the at least one V-shaped reflector, light emitted from the LED light sources can be illuminated as a single, integrated light via their reflectors. Thus, a vehicle lamp using the LED lighting unit can have a favorable light distribution that can be perceived as a single, integrated lighting surface and which can be used for a headlight, a tail lamp, etc.

Abstract: An inexpensive non-contact communication type information carrier with good handling capability and productivity, characterized in that an IC chip 1 formed integral with the antenna coil 3 is mounted in a recessed portion 6 of a core piece body 5 to form a core piece 11 and that the core piece 11 is mounted at a predetermined position on the information carrier.

Abstract: An electronic ballast for a discharge lamp has a compact arrangement of electric parts. The ballast includes an AC-DC converter and an inverter giving a high frequency output voltage for operating the lamp. The inverter includes switching elements, a control circuit, and an output transformer for connection with the lamp. A single circuit board mounts the electric parts forming the converter and the inverter. The circuit board is accommodated within a tubular casing together with a dielectric sheet which is provided for insulating the circuit board as well as the electric parts from the casing. The output transformer is mounted on a top surface of the circuit board together with some of the other electric parts. The ballast includes chip components forming a detection circuit for lamp condition, and the circuit board mounts the chip components on a bottom surface at a location immediately opposite of the output transformer.

Abstract: In an apparatus, a method, and a program for estimation of biological electromagnetic compatibility, model data of a scattering body and an electromagnetic wave radiation source, data for prescribing a range to which an MoM including the electromagnetic wave radiation source is applied and a range to which a scattered field type FDTD method including the scattering body and the range to which the MoM is applied, and the like are previously prepared.

Abstract: An electronic ballast for a discharge lamp has a compact arrangement of electric parts. The ballast includes an AC-DC converter and an inverter giving a high frequency output voltage for operating the lamp. The inverter includes switching elements, a control circuit, and an output transformer for connection with the lamp. A single circuit board mounts the electric parts forming the converter and the inverter. The circuit board is accommodated within a tubular casing together with a dielectric sheet which is provided for insulating the circuit board as well as the electric parts from the casing. The output transformer is mounted on a top surface of the circuit board together with some of the other electric parts. The ballast includes chip components forming a detection circuit for lamp condition, and the circuit board mounts the chip components on a bottom surface at a location immediately opposite of the output transformer.

Abstract: An inexpensive non-contact communication type information carrier with good handling capability and productivity, characterized in that an IC chip 1 formed integral with the antenna coil 3 is mounted in a recessed portion 6 of a core piece body 5 to form a core piece 11 and that the core piece 11 is mounted at a predetermined position on the information carrier.

Abstract: A power supply with a full-wave rectifier and a chopper having an inductor and a transistor connected in series across the rectifier. The transistor is switched on and off providing an interrupted voltage which is applied across a smoothing capacitor, via a blocking diode, to produce a smoothed DC voltage for driving a load. When the transistor is turned on, current from the rectifier is drawn through the inductor. When the transistor is turned off, the current through the inductor is conducted, in a positive direction, to the smoothing capacitor. The inductor and parasitic capacitance inherently present in the chopper create oscillations which allow current to flow through the inductor in a negative direction.

Abstract: An AC-to-DC converter for providing a step-down output DC voltage from an AC voltage source. The converter includes a rectifier connected to the AC voltage source to provide therefrom a rectified DC voltage to a step-up chopper. The chopper includes an inductor and a switching element which is connected in series with the inductor across the rectifier and which is driven to periodically turn on and off so as to store into the inductor an energy from the rectified DC voltage when the switching element is turned on and to release the energy from the inductor through a blocking diode to a charge-pump circuit when the switching element is turned off. The charge-pump circuit is connected to receive the energy released from the inductor as well as from the rectifier to accumulate a first voltage and provides a divided voltage of the first voltage to charge a smoothing capacitor by the divided voltage so as to develop thereat the step-down output DC voltage for driving a load.

Abstract: An inverter device has a full-wave rectifier providing a pulsating DC voltage from an input AC voltage, a smoothing circuit. The smoothing circuit includes a choke coil, a smoothing capacitor and a switching element chopping the pulsating DC voltage through the choke coil into a smoothed DC voltage at the smoothing capacitor. An inverter is included to have the element common to the smoothing circuit and operating to switch the smoothed DC voltage to apply a resulting voltage to a load circuit including a load, inductance and capacitor. The inductance and capacitor define an oscillation circuit providing to the load an oscillating current composed of first and second currents of opposite directions. The oscillating current alternating to flow for a nominal on-time duration determined by a circuit constant of the oscillation circuit itself.

Abstract: The present invention provides a headlamp for a vehicle wherein a reflector is different in focal position of a paraboloidal surface between an upper surface and a lower surface thereof, a focal point on the lower surface side is formed to be positioned forwardly more than a length of a sub-filament from a focal point on the upper surface side, and the sub-filament is positioned between both the focal points to thereby efficiently utilize luminescense and obtain a light distribution pattern of high luminous intensity.