Abstract: Disclosed is an LED lighting apparatus capable of performing lighting using a rectified voltage. The LED lighting apparatus may include a lamp divided into a plurality of light emitting modules, and perform lighting using a voltage obtained by lowering a rectified voltage, thereby preventing internal parts from being damaged by a surge voltage. Furthermore, the structure in which LED groups are arranged on a substrate can be improved to uniformize the light intensity.

Abstract: Disclosed is a lighting apparatus which includes LEDs and reduces flicker. The lighting apparatus may secure a charge voltage by performing a charge operation using a current corresponding to a rectified voltage equal to or more than a preset level, and compensate for the rectified voltage provided to a lighting unit including LED groups by performing a discharge operation for the charge voltage in response to the rectified voltage less than the preset level, thereby reducing flicker.

Abstract: Disclosed are a control circuit and a voltage generation method of an LED lighting apparatus which provides lighting using a rectified voltage. Light emission of the LED lighting apparatus can be implemented through current regulation, a rectified voltage used for light emission can be used to provide a constant voltage required for a peripheral circuit, and a current flowing through a current path formed by the current regulation can be controlled to perform dimming.

Abstract: The present invention relates to a lighting apparatus which stably performs dimming control on a lamp implemented with light emitting diodes (LEDs) or the like. The lighting apparatus may improve power efficiency by driving power supplied to a lamp in a current regulation method, perform constant current control such that the lamp maintains constant brightness, perform dimming control for controlling the brightness of the lamp, commonly supply the power provided to the lamp to peripheral circuit modules, and perform constant voltage control such that a driving voltage supplied as power is maintained at a predetermined level or more.

Abstract: Disclosed are a power supply apparatus for an LED lighting and an LED lighting apparatus using the power supply apparatus. The LED lighting apparatus includes a power source unit configured to supply a rectified voltage, a voltage converter configured to include at least one first inductor and to convert the rectified voltage, an auxiliary coil configured to include a second inductor and to supply a detection voltage corresponding to the current of the first inductor of the voltage converter, a controller configured to control the current of the voltage converter using a driving pulse generated in response to a control signal and a sensing voltage, and a voltage regulation circuit configured to regulate the detection voltage and to supply the regulated voltage as an operating voltage for the controller.

Abstract: Provided is an LED lighting apparatus with an improved heat radiation property, which is capable of effectively radiating heat generated therein. The LED lighting apparatus may include: a light source unit comprising a plurality of LED groups each having one or more LEDs; and a driving unit configured to provide a current path corresponding to light emission of the light source unit. The light source unit and the driving unit may be arranged on the same substrate so as to be separated from each other. Among the plurality of LED groups, the LED group having the largest heat value may be arranged farthest away from the driving unit, compared to the other LED groups. Through the above-described arrangement, the heat radiation property of the LED lighting apparatus can be improved.

Abstract: Disclosed is a light emitting diode lighting apparatus capable of improving a power factor and temperature characteristics. The light emitting diode lighting apparatus according to a preferred embodiment of the present invention includes a light source having a plurality of light emitting diode channels and performs a current regulating operation to allow a light source to emit light. The light source uses a current path provided by current regulating to emit light.

Abstract: The disclosure relates to a cubicle type gas insulated switchgear monitoring and diagnosis system that is able to remotely monitor and diagnose the state by measuring and analyzing in real time deterioration of a gas section and the operation state and the integrity assessment of a breaking unit in a cubicle gas insulated switchgear. The system includes the cubicle gas insulated switchgear, a Slave Data Acquisition System connected to the cubicle gas insulated switchgear, and a Master Data Acquisition System that determines deterioration of the cubicle type gas insulated switchgear and the operation state and the integrity assessment of the breaking unit by receiving and analyzing the sensing data from the S-DAS.

Abstract: Provided is a lighting apparatus using an LED as a lighting source. The lighting apparatus may distribute a current corresponding to a rectified voltage to a lighting unit and a secondary current circuit, perform primary light emission at low luminance, and reduce an optical deviation between LED groups through secondary light emission. Thus, the lighting apparatus can reduce an optical deviation corresponding to dimming and one cycle of rectified voltage.

Abstract: Provided is a lighting apparatus using an LED as a light source. The lighting apparatus may include a plurality of light emitting units each including one or more semiconductor packages having an equal number of LEDs mounted thereon, the light emitting units may be arranged in a longitudinal direction to form a line light source, and the LEDs included in each of the light emitting units may be divided into a plurality of LED groups.

Abstract: Provided is a control circuit of an LED lighting apparatus, which is capable of reducing the occurrence of a flicker while performing lighting. The control circuit of the LED lighting apparatus may include a charge and discharge module charged by a rectified voltage and discharging LED channels, and control one or more of charge timing, a charged voltage, and discharge timing of the charge and discharge module such that the charge and discharge module supplies a voltage to the LED channels at least during a control period at which the amount of current supplied to the LED channels is the smallest. Thus, the occurrence of a flicker in the LED lighting apparatus can be improved.

Abstract: A control circuit of an LED lighting apparatus divided into a plurality of LED channels may include: a current control circuit configured to provide a current path corresponding to sequential light emissions of the LED channels in response to a rectified voltage; and a residual voltage buffer circuit configured to correspond to an LED channel which finally emits light, and buffer a residual voltage when the rectified voltage rises to a preset value such that the residual voltage occurs.

Abstract: An LED lighting device comprises an LED light source unit; a light intensity control unit configured to provide a light intensity control signal for controlling a light intensity through a plurality of steps in a light intensity control mode; and a light source driving unit configured to provide power to the LED light source unit according to the light intensity control signal.

Abstract: Disclosed are a light emitting diode illumination apparatus and a control method thereof. The light emitting diode illumination apparatus includes a light source that includes a plurality of light emitting diode channels including one or more light emitting diodes, and emits light by application of a rectified voltage obtained by converting an AC voltage, and a control circuit that selectively provides current paths according to a change in a level of the rectified voltage through a plurality of switching circuits connected to the light emitting diode channels, and controls pulse widths of control pulses provided to the switching circuits such that an current supplied to the light source of each channel follows a waveform of the rectified voltage.

Abstract: A switching-mode power supply (SMPS) for an image forming apparatus which may prevent an overvoltage supplied to the SMPS, and damage to circuits in the SMPS in the image forming apparatus. The SMPS includes a rectifying circuit to rectify an alternating-current (AC) voltage input from an external power supply source into a direct-current (DC) voltage, a transformer to transform the rectified DC voltage input to a primary coil and output the transformed DC voltage to a secondary coil, a main switch that is connected to the primary coil and switches an output of the transformer, a first overvoltage detecting unit to determine whether the rectified DC voltage is an overvoltage by comparing the rectified DC voltage with a first reference voltage, and a switching control unit to control a switching operation of the main switch based on a result of the determination.

Abstract: An image forming apparatus having two or more different rated voltages, the image forming apparatus including a voltage detecting unit, which detects a voltage level of alternating current (AC) power supplied from outside of the image forming apparatus; a control unit, which outputs a control signal according to the detected voltage level; a fusion driving circuit, which controls a number of waveforms and phase of the AC power according to the control signal and outputs the controlled AC power as fusing power; and a fuser including a heat generating body having a negative temperature coefficient (NTC) characteristic, which receives the fusing power and generates resistance heat; and a heating member, which is heated by the heat generated by the resistance heat generating body and fuses an image formed on a printing medium.

Abstract: An air cleaner is shown and described. The air cleaner may include a cabinet forming an external appearance of the air cleaner, an air blower unit including an air blower case provided with an opening, an air flow channel arranged in the air blower case, a fan arranged in the air flow channel, and a motor arranged in the air blower case to drive the fan, the air blower unit being arranged in the cabinet, a grille formed in the opening to guide air to the air blower unit, a wire fixing portion provided at the grille to fix a wire transferring an electrical signal from an outside of the air blower unit to the motor. Through the above configuration, the wire may be efficiently disposed and the inner space may be efficiently used.

Abstract: An LED lighting device comprises an LED light source unit; a light intensity control unit configured to provide a light intensity control signal for controlling a light intensity through a plurality of steps in a light intensity control mode; and a light source driving unit configured to provide power to the LED light source unit according to the light intensity control signal.

Abstract: The present invention relates to a lighting apparatus which stably performs dimming control on a lamp implemented with light emitting diodes (LEDs) or the like. The lighting apparatus may improve power efficiency by driving power supplied to a lamp in a current regulation method, perform constant current control such that the lamp maintains constant brightness, perform dimming control for controlling the brightness of the lamp, commonly supply the power provided to the lamp to peripheral circuit modules, and perform constant voltage control such that a driving voltage supplied as power is maintained at a predetermined level or more.

Abstract: Disclosed are a light emitting diode illumination apparatus and a control method thereof. The light emitting diode illumination apparatus includes a a light source that includes a plurality of light emitting diode channels including one or more light emitting diodes, and emits light by application of a rectified voltage obtained by converting an AC voltage, and a control circuit that selectively provides current paths according to a change in a level of the rectified voltage through a plurality of switching circuits connected to the light emitting diode channels, and controls pulse widths of control pulses provided to the switching circuits such that an current supplied to the light source of each channel follows a waveform of the rectified voltage.