Abstract: A bumper beam assembly for a vehicle may include a back beam disposed inside a vehicle bumper, both distal ends of the back beam being oriented in a lateral direction of a main body of the vehicle, crash boxes coupled to one side of the back beam, the crash boxes protruding from the both distal ends of the back beam toward the bumper, and back beam stays integrally coupled to the other side of the back beam, the back beam stays protruding from the both distal ends of the back beam toward an inside of the vehicle, in a direction opposite to a direction in which the crash boxes protrude.

Abstract: The present invention includes a class-E power amplifier, comprising a driver stage (DS) including a first power amplifier with transistors, to which an input signal is inputted; a main stage (MS), including a second power amplifier with transistors, whose input is connected to the output of the DS; and a first LC resonator whose one end is connected to the output of the DS and the other end to the ground as an AC equivalent circuit and a second LC resonator whose one end is connected to the input of the MS and the other end to the ground as an AC equivalent circuit. In accordance with the present invention, as the voltage stress is reduced on the CMOS class-E power amplifier, the application of the high power supply voltage may be allowed and therefore the load impedance may be high while the same efficiency is maintained.

Abstract: A method for multiple wireless power transfer, capable of transmitting power wirelessly to multiple receivers, by using a time division scheme, includes the steps of: (a) allotting exclusive power transmission time for at least one of the multiple receivers; and (b) transmitting the power wirelessly to each of the at least one of the receivers; wherein, during the exclusive power transmission time allotted to an i-th receiver, which is one of the multiple receivers, the receiving state of the i-th receiver is set to ON and those of the other receivers to OFF. In accordance with the present invention, the following effects can be achieved: the PTE of the multiple receivers may be increased and the PTE of each of the receivers may be kept similarly because the power is transmitted only to one receiver by using the time division scheme and thus interference among multiple receivers is eliminated.

Abstract: A wireless power transmission device, a wireless power transmission control device, and a wireless power transmission method are provided. A coupling frequency between a source resonator and a target resonator is determined A transmission frequency is controlled such that power is transmitted from the source resonator to the target resonator at the coupling frequency. Therefore, it is possible to maintain a high power transmission efficiency without using an additional matching circuit even when a distance between the source resonator and the target resonator is changed.

Abstract: A linear power amplifier system using pulse area modulation includes: an envelop/phase decomposer for decomposing an input signal into an envelop signal and a phase signal; a pulse area modulator for modulating the envelop signal such that an area of the modulated envelop signal is proportional to an amplitude of the envelop signal; a control signal generator for converting the modulated envelop signal into a control signal; an automatic gain adjuster for equalizing pulse height of the modulated envelop signal; a mixer for mixing the phase signal with the output of the automatic gain adjustor to produce a RF pulse train; a power amplifier for amplifying the RF pulse train, to generate an amplified RF pulse train; and a band pass filter for restoring the original input signal from the amplified RF pulse train. The output level of the power amplifier is controlled by the control signal.

Abstract: A linear power amplifier system using pulse area modulation includes: an envelop/phase decomposer for decomposing an input signal into an envelop signal and a phase signal; a pulse area modulator for modulating the envelop signal such that an area of the modulated envelop signal is proportional to an amplitude of the envelop signal; a control signal generator for converting the modulated envelop signal into a control signal; an automatic gain adjuster for equalizing pulse height of the modulated envelop signal; a mixer for mixing the phase signal with the output of the automatic gain adjustor to produce a RF pulse train; a power amplifier for amplifying the RF pulse train, to generate an amplified RF pulse train; and a band pass filter for restoring the original input signal from the amplified RF pulse train. The output level of the power amplifier is controlled by the control signal.

Abstract: A deflection yoke comprising a coil separator having a rear plate and a neck part which are defined therein and a printed circuit board which is positioned on a side thereof; at least one horizontal deflecting coil disposed on a circumferential inner surface of the coil separator to produce a horizontal magnetic field and connected to the printed circuit board; at least one vertical deflecting coil disposed on a circumferential outer surface of the coil separator to produce a vertical magnetic field; a ferrite core placed on the circumferential outer surface of the coil separator to reinforce the horizontal and vertical magnetic fields of the horizontal and vertical deflecting coils; insulating means defined on an inside surface of the coil separator to prevent a short from being generated due to a contact between one end and the other end of the horizontal deflecting coil connected to the printed circuit board; and coil distance maintaining means defined on an outer surface of a side of the coil separator to

Abstract: A coupling structure of a convergence correction mechanism including a magnet set has a connecting member with an extension part for fitting axially onto one of a cathode ray tube and a neck part of a coil separator on the cathode ray tube and with an insertion part extending axially to a tip end from one axial end of the extension part for receiving the magnet set.