Abstract: The present disclosure provides a charging system including: at least two charging devices including at least two output units configured to supply connected automobiles with charging power, a first bus electrically connected to the output units and configured to transfer charging power to the output units, and a power processing unit configured to process power, which is supplied from a power source, using a first capacity and supply the first bus with the processed power; and a second bus configured to connect a first bus of a first charging device and a first bus of a second charging device, wherein, when a total capacity of charging power supplied to automobiles connected to the first charging device exceeds the first capacity, a part or all of lacking capacity is supplied via the second bus.

Abstract: A multi-input bidirectional DC-DC converter with a high voltage conversion ratio is provided. The multi-input bidirectional DC-DC converter with a high voltage conversion ratio implements phase control loops independent from one another so as to realize independent control of charge and discharge in a plurality of energy storage modules, and thus a failure in one of energy storage modules does not affect the other energy storage modules. In addition, it is possible to easily add or remove a control loop that is controlled independently from other control loops.

Abstract: A multi-phase interleaved bidirectional DC-DC converter with a high voltage conversion ratio is provided. The multi-phase interleaved bidirectional DC-DC converter with a high voltage conversion ratio allows effective control of charge/discharge in multi-energy storage modules including a battery cell module or a super capacitor module, which is characterized in low voltage and high current output. Accordingly, a high-efficiency bidirectional DC-DC converter for use in battery charge/discharge can be implemented.

Abstract: Provided is power conversion technology for charge and discharge control of an energy storage module such as battery or super capacitor.

Abstract: Provided is technology for charge and discharge control of a plurality of energy storage modules having different properties. For achieving the technology, there is provided a multi-input bidirectional DC-DC converter including: a first bidirectional DC-DC converter including a first input unit which stores an input current from a first energy storage module, a primary-side first half-bridge which is connected to the first input unit and controls an input current from the first energy storage module, an output unit which includes an output capacitor, a secondary-side half-bridge which is connected to the output unit and controls the output voltage, and a first transformer whose primary side is connected to the primary-side first half-bridge, whose secondary side is connected to the secondary-side first half-bridge, and which transforms a voltage at the primary side or at the secondary side according to a power mode; and a n-th bidirectional DC-DC converter.

Abstract: A plasma display device and driving method. A plurality of subfields from one frame are divided into a first subfield group and a second subfield group. A first subfield and a second subfield having adjacent weights in the first subfield group each include a reset period for resetting the discharge cells, a first address period for selecting discharge cells in the first line group, a first sustain period for performing a sustain discharge, a second address period for selecting discharge cells in the second line group and a second sustain period for performing a sustain discharge.

Abstract: A plasma display panel and a method thereof is described. A frequency of a sustain pulse varies according to a screen load ratio in each subfield or frame. The frequency of the sustain pulse is determined such that power consumption of the plasma display panel, which is a function of the active power and the reactive power of the sustain pulse, is minimized. When the screen load ratio is increased, the frequency of the sustain pulse is increased since the decrease of the active power is increased and the reactive power is maintained.

Abstract: A plasma display and driving method thereof. A median electrode is formed between X and Y electrodes for receiving sustain pulse voltages, and a reset waveform and a scan pulse voltage are applied to the median electrode. A short gap discharge is performed between the X electrode and the median electrode during the initial interval of a sustain interval, and a long gap discharge is performed between the X and Y electrodes during the normal sustain interval to thus perform a stable discharge. The X and Y electrode drivers are realized through comparable circuits since the waveforms applied to the X and Y electrodes are substantially symmetric.

Abstract: A plasma display and a driving device therefor. In a sustain discharge driving circuit that includes a power recovery circuit and a sustain voltage supply circuit, a transformer is used. The transformer includes a primary coil and a secondary coil that are coupled with each other. The primary coil of the transformer is connected in parallel to a panel capacitor serving as a capacitive load so as to increase a change of a voltage that is applied to an inductor, such that a voltage rising period and a voltage falling period are reduced. With the reduction of the turn-on time of a switch, the power consumption of the switch is reduced. Further, as the inductor initially stores current, the occurrence of hard switching is reduced when a sustain discharge voltage is applied and elements of the circuit are protected.

Abstract: In a plasma display device, subfields may be divided into subfield groups and row electrodes are driven by row groups. Non-light emitting cells may be selected from discharge cells of the row groups during a first address period of the row groups, and light emitting cells of the row groups may be sustain discharged during a first sustain period between two adjacent first address periods in the respective subfields of the first subfield group. A weight of at least one first subfield of the first subfield group may be different from that of at least one second subfield of the first subfield group.

Abstract: A plasma display device including a plasma display panel having a plurality of discharge cells defined between a front substrate and a rear substrate, address electrodes proximate to the discharge cells and extending in a first direction, and scan and sustain electrodes proximate to the discharge cells and extending in a second direction crossing the first direction, wherein, for a same pixel, at least two discharge cells of different colors correspond to a same address electrode.

Abstract: A plasma display device and driving method. A plurality of subfields from one frame are divided into a first subfield group and a second subfield group. A first subfield and a second subfield having adjacent weights in the first subfield group each include a reset period for resetting the discharge cells, a first address period for selecting discharge cells in the first line group, a first sustain period for performing a sustain discharge, a second address period for selecting discharge cells in the second line group and a second sustain period for performing a sustain discharge.

Abstract: A plasma display panel and a method thereof is described. A frequency of a sustain pulse varies according to a screen load ratio in each subfield or frame. The frequency of the sustain pulse is determined such that power consumption of the plasma display panel, which is a function of the active power and the reactive power of the sustain pulse, is minimized. When the screen load ratio is increased, the frequency of the sustain pulse is increased since the decrease of the active power is increased and the reactive power is maintained.

Abstract: A plasma display device and a method for driving the plasma display device. Only some row electrodes are addressed in a sub-field having the smallest weight to reduce the luminance of the sub-field having the smallest weight. Only odd-numbered row electrodes are addressed in an odd-numbered frame and only even-numbered row electrodes are addressed in an even-numbered frame in the address period of the sub-field with the smallest weight. The length of the sustain period of a sub-field having the second smallest weight is identical to the length of the sustain period of the sub-field having the smallest weight. Then, the ratio of the luminances of the two sub-fields is increased by twice to improve representation of lower gray scale.

Abstract: A display and driving method for a display applying a dithering process. The display includes a display panel, a controller, a first driver, and a second driver. The dithering process is applied in subfields of the display panel. A plurality of row electrodes is divided into a plurality of groups according to a dithering pattern in a subfield to which the dithering process is applied. Scan pulses are applied to row electrodes of a group out of the plurality of the groups in sequence, and scan pulses are applied to row electrodes of another group in sequence.

Abstract: A method of processing image data to generate output image data for driving a display panel is provided. In the method, a new resolution for input image data is set according to a resolution of the display panel. A first virtual screen is divided into a plurality of pixel areas according to the new resolution set for the input image data. A second virtual screen having a sub-pixel array structure of the display panel is superimposed on the first virtual screen. A mask wider than a sub-pixel area on the superimposed second virtual screen is laid on each sub-pixel area. An area ratio of the area of each pixel portion on the first virtual screen included in each mask to the area of the mask is obtained and set. The new resolution and the area ratios are applied to a driving device of the display panel. The input image data having an original resolution is transformed into image data having the new resolution.

Abstract: In a plasma display and method thereof, the display includes an M electrode formed between an X electrode and a Y electrode in which a sustain discharge pulse voltage is applied. In addition, a reset waveform and a scan pulse voltage are applied to the M electrode. As such, the M electrode is biased at a first voltage in a first sustain discharge pulse period of a sustain discharge period, and the M electrode is floated in a period after the first sustain discharge pulse period of the sustain discharge period. A sustain discharge voltage pulse is alternately applied to the X electrode and the Y electrode in the sustain discharge period.

Abstract: A plasma display and driving method thereof. A median electrode is formed between X and Y electrodes for receiving sustain pulse voltages, and a reset waveform and a scan pulse voltage are applied to the median electrode. A short gap discharge is performed between the X electrode and the median electrode during the initial interval of a sustain interval, and a long gap discharge is performed between the X and Y electrodes during the normal sustain interval to thus perform a stable discharge. The X and Y electrode drivers are realized through comparable circuits since the waveforms applied to the X and Y electrodes are substantially symmetric.

Abstract: A method for driving a plasma display panel (PDP) that includes a middle electrode formed between an X electrode and a Y electrode. A sustain discharge pulse voltage is periodically applied to the X electrode and the Y electrode in a pulse train fashion. A reset waveform, a scan pulse voltage, and a sustain discharge pulse voltage are applied to the middle electrode. In addition, the final sustain discharge pulse of the sustain discharge period is applied to any one of the X and Y electrodes, and the first sustain discharge pulse can be applied to any one of the X and Y electrodes.

Abstract: A method for driving a plasma display panel (PDP) and for improving contrast. The PDP includes a middle electrode formed between an X electrode and a Y electrode. A sustain discharge pulse voltage is periodically applied to the X electrode and the Y electrode in a pulse train fashion. In addition, a reset waveform, a scan pulse voltage, and a sustain discharge voltage are applied to the middle electrode. Also, to reduce a discharge amount, a voltage of Vxe or Vye is applied to one of the X and Y electrodes during a fallen waveform period of a reset period.