Abstract: A display apparatus and method in which a current ripple is decreased to improve characteristics of a display apparatus are provided. A display apparatus comprises a light source, a plurality of driving power units providing driving electric powers to the light source, and a controller controlling the plurality of the driving power units so that electric currents of the driving electric powers provided from the respective driving power units have a predetermined phase difference from each other.

Abstract: An electronic apparatus and method of controlling the electronic apparatus are provided, in which a power supply supplies a driving voltage to a system; and a controller sequentially outputs a control signal controlling a level of the driving voltage to the power supply until a level of a usage voltage corresponding to the driving voltage in the system becomes substantially identical to a predetermined reference level, if the level of the usage voltage is not substantially identical to the reference level. Accordingly, the electronic apparatus and control method thereof automatically adjusts a size of driving power supplied to respective parts of the electronic apparatus.

Abstract: Provided is a display apparatus that includes a light source, that further includes a current generator for outputting a predetermined driving current. Further provided is a first path for supplying the driving current output by the current generator to the light source and a second path for intercepting the driving current supplied to the light source. In addition, a switch is provided for supplying the driving current output by the current generator either to the first path or to the second path and a controller is provided for controlling the switch to supply the driving current output by the current generator to the first path while the light source is turned on, and to supply the driving current to the second path while the light source is turned off. Thus, the present invention provides a display apparatus which improves a response time of electrical current when a light source is turned on and off, and thereby improves display quality.

Abstract: A display apparatus is provided to operate a light emitting unit with a small number of power drivers. The display apparatus has a plurality of light emitting units, a power driver, whose total provided therein is less than the total of light emitting units, that outputs driving power to the light emitting units. A power switch is switched on and off to supply the driving power to one of the plurality of light emitting units, and a controller controls the power switch to sequentially supply the driving power to the plurality of light emitting units.

Abstract: Provided is a load driving device controlling a drive of a load including a driver for periodically turning on/off a current according to a switching clock signal and supplying a average driving current to the load. Further provided is a dimming controller for controlling the driver to turn on/off the drive of the load based on a dimming step. Also provided is a controller for controlling at least one of the driver and the dimming controller so as to make a step interval of the dimming step and a switching clock period of the switching clock signal the same. A load driving device is provided that is capable of stably controlling the dimming of a drive of a load, by improving a linear response characteristic of a driving current according to a dimming control.

Abstract: Disclosed is an image misconvergence correction apparatus having a correction value generation unit for calculating a convergence correction value to correct misconvergence occurring when a video signal is scanned on a display device; an amplification unit for performing D-class amplification with respect to the convergence correction value; a convergence yoke mounted in the display device to control a path of electron beams corresponding to the video signal based on the convergence correction value amplified in the amplification unit; and a feedback sensing unit for differentially amplifying a voltage value for electric current passing through the convergence yoke, and feeding back the differentially amplified voltage value to the correction value generation unit.

Abstract: The present invention relates to a display apparatus comprising a light emitting element supplying light, and a switch to switch on and off power, which is supplied to the light emitting element. A comparing unit compares a predetermined first reference voltage and an output voltage which is proportional to a current applied to the light emitting element. A controller compares a comparison voltage output, which is a comparison result of the comparing unit and a predetermined second reference voltage, in order to control the switch to be switched on and off. Accordingly, the present invention provides a display apparatus and control method which precisely controls a size of a current applied to a light emitting element.

Abstract: A thin transformer includes a hollow coil bobbin around which a coil is wound, an iron core provided to pass through a portion of the coil bobbin, and a terminal section having several terminals electrically connected to drawn-out lines of the coil and electrically and mechanically connected to a circuit board, the terminal section disposed adjacent to the coil bobbin below the iron core and provided at the terminal section such that a first portion of each terminal connected to a corresponding one of the drawn-out lines is exposed from a side surface of the terminal section other than a lower surface of the terminal section from which each terminal is exposed for connection to the circuit board. A plurality of grooves through which the drawn-out lines connected to the respective terminals can pass are formed on the terminal section.

Abstract: A surface light source unit, a liquid crystal display apparatus, and a method for reducing snaking and vibration of the positive column caused in the surface light source unit are provided. The surface light source unit includes at least one discharge space for emitting light, a first electrode positioned a distance apart from the center of one side of the discharge space for emitting current, and a second electrode positioned at a distance apart from the center of the other side of the discharge space for receiving the current emitted from the first electrode. The first electrode and the second electrode disposed at both sides of the discharge space arranged on the upper side of the surface light source unit are positioned at the upper side of the center of the discharge space. The first electrode and the second electrode positioned at both sides of the discharge space arranged on the lower side of the surface light source unit are positioned apart from the center of the discharge space.

Abstract: A back light driving device having an inverter circuit connected with a lamp, the inverter circuit including a driving voltage generating unit provided with a plurality of lead parts, which is joined with a power input unit and a switch unit for supplying a driving voltage to the lamp, wherein each of the lead parts includes a plurality of lead terminals. Accordingly, the back light driving device is capable of preventing malfunctions due to disconnections or poor lead terminal junctions of the driving voltage generating unit.

Abstract: A method of supplying a power to elements in a power supply apparatus including a primary side and a second side. Particularly, a method of supplying a driving power to an element at the primary side of the power supply apparatus from a primary coil of a transformer. A power factor improvement section improves a power factor of a received alternating current (AC) power. A transformer then receives the AC power having the improved power factor from a primary coil and generates an induced power at a secondary coil. The transformer then provides the AC power to drive a predetermined element located at the primary side of the power supply apparatus from the primary coil.

Abstract: An image distortion compensating apparatus controls a convergence yoke, and includes a compensation value generator for calculating a convergence compensation value for compensating a convergence distortion which occurs while an image signal is emitted onto a display apparatus, the compensation value generator outputting the convergence compensation value after compensating for a phase and a gain of the convergence yoke; an amplifier for D-class amplifying of the convergence compensation value; and a convergence yoke attached to the display apparatus for controlling a path of electron beams corresponding to the image signal, based on the convergence compensation value as amplified at the amplifier.

Abstract: A power factor compensation method and apparatus adapted for use in a power supply which provides direct-current (DC) power via a capacitive input type smoothing circuit, and an improved power supply using the same. The power factor compensation method can correct a power factor in the power supply which rectifies an input alternating-current (AC) voltage and smoothes the same using the capacitive input type smoothing circuit to supply a DC voltage. The method may include rectifying the input AC voltage, cutting off a pulsating current generated in the rectifying operation at phases of about ?/2 and 3 ?/2 of the input AC voltage so that the pulsating current is not transferred to a smoothing circuit, and smoothing the pulsating current generated in the cutting-off operation. The power factor compensation apparatus does not form a peak envelope of current at phases of about ?/2 and 3 ?/2 of the input AC voltage, thereby improving a power factor and reducing a harmonic current.

Abstract: A thin transformer includes a hollow coil bobbin around which a coil is wound, an iron core provided to pass through a portion of the coil bobbin, and a terminal section having several terminals electrically connected to drawn-out lines of the coil and electrically and mechanically connected to a circuit board, the terminal section disposed adjacent to the coil bobbin below the iron core and provided at the terminal section such that a first portion of each terminal connected to a corresponding one of the drawn-out lines is exposed from a side surface of the terminal section other than a lower surface of the terminal section from which each terminal is exposed for connection to the circuit board. A plurality of grooves through which the drawn-out lines connected to the respective terminals can pass are formed on the terminal section.

Abstract: An image distortion compensating apparatus controls a convergence yoke, and includes a compensation value generator for calculating a convergence compensation value for compensating a convergence distortion which occurs while an image signal is emitted onto a display apparatus, the compensation value generator outputting the convergence compensation value after compensating for a phase and a gain of the convergence yoke; an amplifier for D-class amplifying of the convergence compensation value; and a convergence yoke attached to the display apparatus for controlling a path of electron beams corresponding to the image signal, based on the convergence compensation value as amplified at the amplifier.

Abstract: Disclosed is an image misconvergence correction apparatus having a correction value generation unit for calculating a convergence correction value to correct misconvergence occurring when a video signal is scanned on a display device; an amplification unit for performing D-class amplification with respect to the convergence correction value; a convergence yoke mounted in the display device to control a path of electron beams corresponding to the video signal based on the convergence correction value amplified in the amplification unit; and a feedback sensing unit for differentially amplifying a voltage value for electric current passing through the convergence yoke, and feeding back the differentially amplified voltage value to the correction value generation unit.

Abstract: An AC or DC electronic lamp-driving ballast circuit which prevents the generation of harmonic currents. The ballast circuit includes a filter for receiving and filtering an AC voltage, a ripple transformer for converting the AC voltage into a unilateral ripple voltage, and a voltage reducing transformer for pulse-width-modulating, using a modulation signal generated by a power controller, the ripple voltage into a reduced DC voltage to be transferred to the lamp. A power controller feedback-amplifies the reduced voltage, a sensing voltage of the ripple voltage, and a current sensing voltage supplied from the lamp, and then generates, using the amplified voltage, the pulse width modulation signal used by the voltage reducing transformer. A trigger generator generates high voltage trigger pulses in order to induce an initial discharge in the lamp so that the lamp may be turned on.

Abstract: A convergence output circuit for converging signals corresponding to the primary colors of an input video signal which reduces power loss by including a positive power source voltage supply circuit for supplying a first voltage to a first current supply circuit during a blanking period of the input video signal and for supplying a second voltage, lower than the first voltage, to the first current supply circuit during a scanning period of the video signal, both the first and second voltages being positive. A negative power source voltage supply circuit supplies a third voltage, opposite in polarity to the first voltage, to the second current supply circuit during the blanking period and supplies a fourth voltage, opposite in polarity to the second voltage, to the second current supply circuit during the scanning period, both the third and fourth voltages being negative.

Abstract: A power protection circuit for detecting the level of output voltage source from a power supply, comprises a first detector for detecting a first output state of the power supply, a second detector for detecting a second output state of the power supply, an abnormality detector for recognizing the detecting states of the first and second detection means and detecting an abnormality state from the outputs of the power supply and generating an abnormality signal responsive to said abnormality state, an initial-ineffective circuit for making said abnormality signal ineffective when source voltage is supplied at the first stage, a driver for receiving said abnormality signal from said abnormality detecting means and generating continuous abnormality signal once said abnormality state is occurred.