Abstract: Provided are a wireless power transmission receiver and a system including the same, particularly to a receiver and transmitter transmitting power from one transmitter to a plurality of receivers at the same time by wireless. According to the present invention, the wireless power receiver comprises a receiving coil unit receiving power from a transmitter by a resonance coupling method; and a power receiving unit receiving power from the receiving coil unit to provide the power to a load resistor, wherein an input impedance of the power receiving unit is adjusted according to power consumed by a plurality of receivers. Therefore, power transmission efficiency of the wireless power receiver and transmitter can be improved.

Abstract: Provided is a solid type heat dissipation device for electronic communication appliances. The solid type heat dissipation device includes a graphite thin plate horizontally transferring heat, a plurality of metal fillers passing through the graphite thin plate to vertically transfer heat, and a plurality of metal thin plates attached to upper and lower surfaces of the graphite thin plate and connected to the metal fillers.

Abstract: Provided are a resonance tunneling device and a method of manufacturing the resonance tunneling device. The resonance tunneling device includes a substrate, a plurality of electrodes disposed on the substrate, and a nanoparticle layer disposed between the electrodes, and doped with an impurity. The nanoparticle layer uses the impurity to exhibit resonance tunneling where a current peak occurs at a target bias voltage applied between the electrodes.

Abstract: Provided are a resonance tunneling device and a method of manufacturing the resonance tunneling device. The resonance tunneling device includes a substrate, a plurality of electrodes disposed on the substrate, and a nanoparticle layer disposed between the electrodes, and doped with an impurity. The nanoparticle layer uses the impurity to exhibit resonance tunneling where a current peak occurs at a target bias voltage applied between the electrodes.

Abstract: Provided is a method for a wireless power transfer. The method includes modulating a transmission frequency according to a predetermined value at a wireless power transmitter; and transmitting a high frequency signal according to the modulated transmission signal from the wireless power transmitter to at least one wireless power receiver and redetermining the predetermined value according to information which corresponds to a power value of the high frequency signal received by the at least one wireless power receiver, wherein the modulating the transmission frequency at the wireless power transmitter and transmitting the high frequency and the redetermining the predetermined value the at least one wireless power receiver are repeated.

Abstract: Provided are a nonvolatile memory cell and a method of manufacturing the same. The nonvolatile memory cell includes a memory transistor and a driver transistor. The memory transistor includes a semiconductor layer, a buffer layer, an organic ferroelectric layer, and a gate electrode, which are disposed on a substrate. The driver transistor includes the semiconductor layer, the buffer layer, a gate insulating layer, and the gate electrode, which are disposed on the substrate. The memory transistor and the driver transistor are disposed on the same substrate. The nonvolatile memory cell is transparent in a visible light region.

Abstract: Provided are a method of fabricating an electrophoretic ink, the electrophoretic ink formed using the method, and an electrophoretic display having the same. The method of fabricating an electrophoretic ink includes dispersing pigment particles into a dielectric fluid; adding at least one monomer and an initiator into the dielectric fluid; and forming polymeric membranes surrounding the pigment particles in the dielectric fluid. Since the pigment particle surrounded by the polymeric membrane and the dielectric fluid in which the pigment particle is dispersed can be utilized as the electrophoretic ink as they are without a follow-up cleaning process, the method of fabricating the electrophoretic ink is simplified.

Abstract: Provided are a resonance tunneling device and a method of manufacturing the resonance tunneling device. The resonance tunneling device includes a substrate, a plurality of electrodes disposed on the substrate, and a nanoparticle layer disposed between the electrodes, and doped with an impurity. The nanoparticle layer uses the impurity to exhibit resonance tunneling where a current peak occurs at a target bias voltage applied between the electrodes.

Abstract: Provided are a transparent nonvolatile memory thin film transistor (TFT) and a method of manufacturing the same. The memory TFT includes source and drain electrodes disposed on a transparent substrate. A transparent semiconductor thin layer is disposed on the source and drain electrodes and the transparent substrate interposed between the source and drain electrodes. An organic ferroelectric thin layer is disposed on the transparent semiconductor thin layer. A gate electrode is disposed on the organic ferroelectric thin layer in alignment with the transparent semiconductor thin layer. Thus, the transparent nonvolatile memory TFT employs the organic ferroelectric thin layer, the oxide semiconductor thin layer, and auxiliary insulating layers disposed above and below the organic ferroelectric thin layer, thereby enabling low-cost manufacture of a transparent nonvolatile memory device capable of a low-temperature process.

Abstract: Provided is a bending test apparatus of a flexible device. The bending test apparatus includes: first and second electrode parts disposed in a horizontal direction and loading a flexible device horizontally, wherein the first electrode part is movable in the horizontal direction and the second electrode part is fixed so that the first electrode part horizontally moves toward the second electrode part to apply mechanical stress of the horizontal direction to the flexible device.

Abstract: A thin-film transistor may include a drain electrode, a source electrode, an active layer, a gate electrode, and a gate insulating layer. In a vertical sectional view, the gate insulating layer may be disposed between the active layer and the gate electrode to include a first inorganic layer, an organic layer, and a second inorganic layer sequentially stacked. According to a method of fabricating the thin-film transistor, the gate insulating layer may be formed between the steps of forming the active layer and the second electrode layer or between the steps of forming the first electrode layer and the second electrode layer.

Abstract: Disclosed is a wireless power transferring device which includes a power generating unit configured to generate a power using a solar battery; a power charging unit including a super capacitor or a battery and configured to charge the generated power to retain a power; and a transmission unit configured to convert the power of the charging unit into a high frequency to send the high frequency wirelessly.

Abstract: Disclosed is a wireless power transmitting and receiving device which includes a wireless power receiving device comprising a receiving coil configured to receive a non-radiated electromagnetic wave; and a frequency adjusting unit configured to adjust a resonant frequency of the receiving coil and a wireless power transmitting device comprising a transmission coil configured to generate a non-radiated electromagnetic wave by magnetic induction with a power coil; and a frequency adjusting unit configured to adjust a resonant frequency of the transmission coil. The frequency adjusting unit adjusts a resonant frequency of the receiving coil by closing a surroundings of the receiving coil by a magnetic sheet. The frequency adjusting unit adjusts a resonant frequency of the transmission coil by inserting a magnetic sheet in the transmission coil.

Abstract: Provided are a transferred thin film transistor and a method of manufacturing the same. The method includes: forming a source region and a drain region that extend in a first direction in a first substrate and a channel region between the source region and the drain region; forming trenches that extend in a second direction in the first substrate to define an active layer between the trenches, the second direction intersecting the first direction; separating the active layer between the trenches from the first substrate by performing an anisotropic etching process on the first substrate inside the trenches; attaching the active layer on a second substrate; and forming a gate electrode in the first direction on the channel region of the active layer.

Abstract: Provided is a wireless power transfer device. The wireless power transfer device includes: a base substrate including a base coil; transmission substrates spaced from the base substrate and including transmission coils; and a contact plug penetrating the base substrate and the transmission substrates to connect one ends of the transmission coils; wherein the transmission coils have the greater turn number than the base coil and transmitting/receiving a power signal through a magnetic resonance method.

Abstract: Provided is a portable device. The portable device includes a near distance antenna, a long distance antenna, a first power generation circuit, a second power generation circuit, and a battery. The near distance antenna receives a first power source signal in an electromagnetic inductive coupling scheme. The long distance antenna receives a second power source signal in a magnetic resonance scheme. The first power generation circuit generates a power source from the first power source signal. The second power generation circuit generates a power source from the second power source signal. The battery is charged with the generated power source.

Abstract: A power transmitter includes a signal processor that externally obtains a reception power state signal depending on variation of a distance between transmission and reception coil units, a modulation controller configured to a modulation frequency for selecting a frequency band having maximum power transmission performance, based on the reception power state signal, a power signal generator that generates a power signal, and a modulator that modulates the power signal in response to the modulation frequency, the reception coil unit being configured to transmit the modulated signal. A power receiver includes a reception coil unit that receives a power signal, a power generator that generates power by receiving the power signal from the reception coil unit, and a signal generator that generates a reception power state signal depending on the generated power level and transmits the latter signal to a transmission coil unit corresponding to the reception coil unit.

Abstract: Provided are an organic thin film transistor and a method of forming the same. The method comprises forming a gate electrode on a substrate, forming a gate dielectric, which covers the gate electrode and includes a recess region at an upper portion, on the substrate, forming a source electrode and a drain electrode in the recess region, and forming an organic semiconductor layer between the source electrode and the drain electrode in the recess region.

Abstract: Provided are a resonance tunneling device and a method of manufacturing the resonance tunneling device. The resonance tunneling device includes a substrate, a plurality of electrodes disposed on the substrate, and a nanoparticle layer disposed between the electrodes, and doped with an impurity. The nanoparticle layer uses the impurity to exhibit resonance tunneling where a current peak occurs at a target bias voltage applied between the electrodes.

Abstract: Provided is a power transmission device including a transmission unit and a reception unit. The reception unit includes an overvoltage protection circuit and provides a feedback signal to the transmission unit. The transmission unit controls intensity of power wirelessly transmitted to the reception unit with reference to the feedback signal to control power consumption of the overvoltage protection circuit. The overvoltage protection circuit includes a detection unit and a current control unit. The detection unit detects an input voltage and a first current to generate a control signal. The current control unit controls a second current with reference to the control signal. Herein, the second current is controlled so that a ratio of the input voltage to a sum of the first and second currents is kept constant.