Abstract:
The invention is directed to bipyridine-based compound and organic light emitting diodes (OLED) including organic layers having the bipyridine-based compound. OLEDs including organic layers having the bipyridine-based compounds can have low driving voltages, high current densities, high efficiencies and long lifetimes.
Abstract:
A polymer and an organic light-emitting device including the polymer. An example of the polymer is wherein in Formula 1, Ar1 is each independently represented by -(Q1)n-, and Q1 is selected from the group consisting of a substituted or unsubstituted C5-C30 arylene group, a substituted or unsubstituted C4-C30 heteroarylene group, a substituted or unsubstituted C2-C30 alkenylene group, and a group represented by —N(Z1)—, and n is an integer from 1 to 10, and n groups of Q1 in -(Q1)n- is identical to or different from each other, and X1 and X2 are each independently selected from the group consisting of —O—, —S—, —N(Z2)—, and —C(Z3)(Z4)—.
Abstract:
The present invention relates to a switch control circuit, a switch control method, and a converter using the same.An input voltage rectified from an AC input in a converter is transmitted to an inductor, and output power is generated from an inductor current by the input voltage. The converter includes a power switch connected to the inductor to control the inductor current and a sense resistor having a first end connected to a ground and a second end connected to the AC input. At a time point that a sense voltage generated in the sense voltage reaches the peak point and then decreased to an on-reference voltage, the power switch is turned on. The on-reference voltage is a sense voltage at a resonance start time point between a parasite capacitor of the power switch and the inductor.
Abstract:
A mobile broadcast system for delivering a notification event for generation of a notification message for information provisioning to a subscriber receiving a broadcast service is provided. The mobile broadcast system includes a first apparatus for managing subscriber information of the broadcast service, handling generation of at least one notification message according to at least one notification event, and generating a response message indicating generation end of the notification message; and a second apparatus for sending a notification event message for requesting generation of the notification message to the first apparatus according to the at least one notification event, receiving the response message in response thereto, and then handling delivery of the notification message over a broadcast channel or an interaction channel.
Abstract:
A condensed-cyclic compound represented by Formula 1 below, an organic light-emitting device including the same, and a flat panel display apparatus including the organic light-emitting device: wherein, X, Y, A1, A2, L1, L2, L3, Ar1, R1, R2, R3, R4, R5, R6, a, b, c, d, e, f, and g are described in the detailed description of the invention. The organic light-emitting device including an organic layer including the compound above has low driving voltage, high emission efficiency, and long lifetime.
Abstract:
Embodiments of the present invention relate to a switch control circuit, a switch control method, and a power supply device using the same.Embodiments generate a reference signal according to a full-wave rectification voltage and control a switching operation of a power switch according to a comparing result of a sense voltage corresponding to a current flowing to the power switch and the reference voltage. Embodiments determine whether a line is opened between a first output terminal and a second output terminal of the power supply device using the sense voltage. When the line is opened, Embodiments turn off the protection switch.
Abstract:
The present invention relates to a switch control circuit, a switch control method, and a converter using the same.An input voltage rectified from an AC input in a converter is transmitted to an inductor, and output power is generated from an inductor current by the input voltage. The converter includes a power switch connected to the inductor to control the inductor current and a sense resistor having a first end connected to a ground and a second end connected to the AC input. At a time point that a sense voltage generated in the sense voltage reaches the peak point and then decreased to an on-reference voltage, the power switch is turned on. The on-reference voltage is a sense voltage at a resonance start time point between a parasite capacitor of the power switch and the inductor.
Abstract:
An apparatus for preventing withdrawing and insertion of a carriage of a circuit breaker is disclosed. When a circuit breaker main body is inserted, an interlocking unit operates by interworking with the carriage withdrawing and inserting preventing apparatus, and while the circuit breaker is being closed, a withdrawal and insertion handle prevents a lead screw from being rotated by the interlocking unit. Thus, when the circuit breaker performs a closing operation, unnecessary withdrawing and inserting operation of the carriage is basically prevented to thus prevent various safety accidents, a contact resistance, a temperature increase, and damage to a device resulting from a breakdown.
Abstract:
A monopolar membrane electrode assembly (MEA) for a fuel cell, for example, includes: an electrolyte membrane; anode and cathode electrodes formed on opposite surfaces of the electrolyte membrane, respectively; current collecting bodies that form electrical paths of electricity generated from an electricity generation reaction between the anode and cathode electrodes and the electrolyte membrane; and sensing elements to measure changes in operation state conditions during electricity generation and electrical connection. Since temperature and fuel concentration in the monopolar MEA having the above structure are detected on a real time basis, appropriate action can be taken whenever an abnormal operation thereof is detected.
Abstract:
Disclosed is a system for diagnosing the pathological change in lipids in blood vessels using coherent anti-strokes raman microscopy which can image lipids abnormally deposited on the deep intima of blood vessels and analyze the components of the imaged lipids, without labeling or destroying blood vessels, to diagnose minute pathological changes in the blood vessels, whereby the stage of progression of lipid-related diseases can be determined.