Abstract: A pixel cell includes a substrate, an epitaxial layer, and a photo converting device in the epitaxial layer. The epitaxial layer has a doping concentration profile of embossing shape, and includes a plurality of layers that are stacked on the substrate. The photo converting device does not include a neutral region that has a constant potential in the vertical direction. Therefore, the image sensor including the pixel cell has high quantization efficiency, and a crosstalk between photo-converting devices is decreased.

Abstract: Disclosed are an XML document management method for cancelling a specific past operation, and a system using the same. The method comprises identifying an original operation to be cancelled, identifying an XML resource to be cancelled, identifying a previous value of the XML resource to be cancelled, identifying a next value of the XML resource to be cancelled, configuring a cancel operation, and applying the cancel operation to the XML resource to be cancelled.

Abstract: A method and apparatus for managing a spam message in a messaging service are disclosed. When a user reports a message determined as a spam message, he may directly select a sharing level of his personal information in order to prevent a leakage of the personal information according to a sharing policy, reports the spam message by transmitting only a hash value of the spam message in order to prevent an increase in traffic. With respect to reported spam messages, a user can access a spam server to check an errononeously reported message through a sorting algorithm.

Abstract: A circuit for using a high voltage gate driver IC (HVIC) for regulation of external floating voltage sources without use of regulation circuits. The circuit including high and low switches; at least one external voltage source coupled to the high and low switches; an HVIC having at least one internal charge pumping voltage source circuit, the HVIC being coupled to gate terminals of the high and low switches; and at least one charge pumping capacitor coupled to the at least one internal charge pumping voltage source circuit for regulating the external voltage of at least one external voltage source.

Abstract: Provided is an automated periodic surveillance testing method and apparatus in a digital reactor protection system, which unites a passive testing means such as a self-diagnosis or an on-line state comparison with an active testing means such as an automatic logic test and the like in the digital reactor protection system. Accordingly, a device self-diagnosis, an on-line state diagnosis, and an automatic logic test are used as the automated periodic surveillance testing method in the digital reactor protection system. Thus, the time consumed in a periodic surveillance test can be minimized, thereby saving reactor operating costs, and excessive manpower can be avoided, thereby decreasing potential human errors. Also, a channel detour time at which one of multiple channels is detoured can be minimized based on the automated periodic surveillance test in the digital reactor protection system, thereby enhancing stability.

Abstract: Provided is a plasma display panel having flexibility. The plasma display panel includes a panel assembly that displays images and has flexibility, a plurality of base members that are attached to a surface of the panel assembly and support the panel assembly, and connection members that connect the base members to each other and are installed to be bent in the same direction as the panel assembly is bent. The base members that support the panel assembly having flexibility on a rear surface of the panel assembly can be bent or folded in the same direction as the panel assembly by the connection members.

Abstract: Disclosed is a method for delivering a message in a converged IP messaging (CPM) server.

Abstract: A method for delivering a message from a converged IP messaging (CPM) server include: checking registered target terminals that can receive a message from a source terminal based on a user preference; determining whether to deliver a message from the source terminal to the checked target terminal based on the user preference; when the message is determined to be delivered, determining whether to store the message in a message storage server based on the user preference; when the message is determined to be stored, requesting the message storage server to store the message; receiving a response message including information regarding the stored message from the message storage server; and including the information in the message and transmitting the same to the target terminal.

Abstract: In a PDP, a waveform which has a reset function, an address function, and a sustain discharge function to a scan electrode while a sustain electrode is biased at a constant voltage. The waveform includes a voltage which corresponds to a difference between a voltage applied to the scan electrode and a voltage applied to the sustain electrode in the general driving waveform. As a result, a board for driving the sustain electrode is eliminated, and a combined board is realized.

Abstract: Disclosed are a driving device and a driving method for a plasma display panel (PDP). A panel capacitor is formed by a scan electrode and a sustain electrode. The charges are moved from the panel capacitor to a capacitor by turning on a transistor which is connected between the scan electrode and the capacitor. By this method, the voltage of the panel capacitor is steeply reduced so that a discharge is generated in the panel capacitor. When the voltage of the capacitor increases because of the charges moved from the panel capacitor, the gate-source voltage of the transistor is reduced. As a result, the transistor is turned off so that the scan electrode is floated. Accordingly, the discharge is steeply quenched so that the wall charges are precisely controlled. After the capacitor is discharged, the above-noted operation may be repeated.

Abstract: A pixel cell includes a substrate, an epitaxial layer, and a photo converting device in the epitaxial layer. The epitaxial layer has a doping concentration profile of embossing shape, and includes a plurality of layers that are stacked on the substrate. The photo converting device does not include a neutral region that has a constant potential in the vertical direction. Therefore, the image sensor including the pixel cell has high quantization efficiency, and a crosstalk between photo-converting devices is decreased.

Abstract: A plasma display panel may include a first substrate and a second substrate facing each other, barrier ribs disposed between the first substrate and the second substrate, and at least partially defining a plurality of discharge cells therebetween, a plurality of pairs of discharge electrodes for generating a discharge in the discharge cells, the plurality of pairs of discharge electrodes being arranged in non-display portions of the plasma display panel, and a color filter layer disposed between the barrier ribs and the first substrate.

Abstract: In a plasma display panel, a sustain discharge pulse voltage is applied to the scan or sustain electrodes while the address electrode is biased with a ground voltage, and a negative assistant pulse voltage is applied to an electrode that is not receiving the sustain discharge pulse. At least a part of a period for applying the negative assistant pulse is positioned prior to a period of applying the sustain discharge pulse. Discharge efficiency can be improved by applying the negative assistant voltage to the sustain electrode when the sustain discharge is applied to the scan electrode across a long discharge gap.

Abstract: Disclosed is a driver for a PDP including discharge cells with a plurality of electrodes, which may include the following: a first voltage source having a first voltage level; a first active element for intercepting a current flow in the direction of the first voltage source; a first switch coupled between the first active element and an electrode; a capacitor for storing a second voltage; and a second switch for supplying the second voltage stored in the capacitor to the electrode. The first active element and the first switch may each be transistors, and they may be coupled together, back-to-back.

Abstract: A plasma display panel having a structure for reducing manufacturing costs and the failure rate of terminal portions of discharge electrodes. The PDP includes: a substrate and a barrier rib structure configuring a plurality of discharge cells. Discharge electrodes include discharge portions, terminal portions, and connection portions connecting the discharge portions with the terminal portions. A sealing member seals the discharge cells. A frit seals the substrate and the sealing member. At least one frit guide restricts the spreading of the frit. A phosphor layer is inside each of the discharge cells. A discharge gas is sealed in the discharge cells.

Abstract: A switching device for a plasma display panel that facilitates operations at a high voltage. The switching device may be formed with more than one insulated gate bipolar transistors (IGBT) coupled in parallel. The switching device may also be formed with an insulated gate bipolar transistor and a metal-oxide semiconductor field effect transistor (MOSFET) coupled in parallel. The MOSFET may be used for the switching device in a low current area and the IGBT may be used for the switching device in a high current area.

Abstract: An energy recovery driving circuit of the present invention has a resonant inductor, a primary coil and at least one secondary coil of a transformer, and an energy recovery unit. The resonant inductor is connected to the load for allowing a charge and/or discharge current to be applied to the load to flow through the resonant inductor. The primary coil is connected to the resonant inductor, and is connected to both the resonant inductor and the load so as to allow the charge and/or discharge current to flow through the primary coil when the charging and/or discharge current flows through the load. The secondary coil is coupled to the primary coil. The energy recovery unit generates a current according to the predetermined number of turns of the secondary coil to allow the current flowing through the secondary coil to be recovered to a supply voltage source.

Abstract: A high voltage gate driver circuit in accordance with an embodiment of the present application includes a first driver operable to provide a first output voltage signal, a second driver operable to provide a second output voltage signal, internal circuitry operable to process the second output voltage signal to provide a processed output voltage signal having different characteristics than the first output voltage signal and a selection circuit operable to select one of the first output voltage signal and the processed output voltage signal as a gate drive signal. The high voltage gate driver may also include a single external power switch connected to the selection circuit such that the gate drive signal is provided to the gate of the external power switch to turn the external power switch on and off as desired.

Abstract: A plasma display panel includes first and second substrates facing each other, a first barrier rib structure between the first and second substrates, the first barrier rib structure including first and second barrier rib portions in communication with each other, a second barrier rib structure on the second substrate, the second barrier rib structure aligned with the first barrier rib portion to define a plurality of discharge cells, a plurality of discharge electrodes, each discharge electrode including a discharge part in the first barrier rib portion, a terminal part in communication with the second barrier rib portion, and a connection part between the discharge and terminal parts, a signal transmitting member with conductive wires, the conductive wires being connected to the terminal parts, a support part between the second substrate and the second barrier rib portion of the first barrier rib structure, and photoluminescent layers in the discharge cells.

Abstract: A High Voltage Gate Driver IC (HVIC) having an internal ramp drive function for controlling a high power switch to produce ramp output voltage waveforms. The HVIC including a sensor for sensing a voltage across the power switch; a reference generator for generating a reference voltage signal in accordance with an external setting; and a feedback circuit to provide a feedback gain to control a gate of the power switch, the feedback circuit making voltage across the power switch follow to reference and stable, wherein the HVIC generates the ramp drive function with minimized circuit components external to the HVIC.