Patent application number | Description | Published |
20090152946 | POWER SUPPLY DEVICE - Provided is a power supply device including a power supply unit that supplies a driving voltage for driving at least one or more loads; a current balancing unit that maintains a current balance of the driving voltage supplied to the respective loads; a detection unit that detects currents flowing in the current balancing unit through electromagnetic induction so as to output a detection signal; and a control unit that receives the detection signal to judge whether the loads are opened or not and outputs a control signal for controlling the magnitude of the driving voltage. | 06-18-2009 |
20100202160 | POWER CONVERTER TRANSFORMER FOR SUPPRESSING CONDUCTION EMI AND POWER SUPPLY HAVING ITS TRANSFORMER - In accordance with the present invention, a power converter transformer for suppressing conduction EMI(ElectroMagnetic Interference) includes a primary winding positioned at a primary side; a secondary winding positioned at a second side and coupled with the primary winding; a parasitic capacitor connected between one end of the primary winding and one end of the secondary winding; a switching unit connected to the other end of the primary winding; a Y-capacitor connected between the switching unit and a ground terminal; an auxiliary winding positioned at the secondary side and coupled with the secondary winding; and an auxiliary capacitor connected between the one end of the primary winding and the auxiliary winding. | 08-12-2010 |
20100237799 | LED DRIVING CIRCUIT - The present invention provides an LED driving circuit including: an inverter unit for switching an input power source; a plurality of transformers including a plurality of primary windings connected to the inverter unit and connected to each other in series and a plurality of secondary windings each of which is coupled with each of the primary windings; a plurality of rectification units each of which is connected to each of the secondary windings; and a plurality of LEDs each of which is connected to each of the rectification units. | 09-23-2010 |
20120223797 | CHOKE COIL - Provided is a choke coil including: a first primary winding portion formed by winding a primary coil by n turns; a second primary winding portion formed by winding the primary coil by N turns; a first secondary winding portion formed by winding a secondary coil by N turns; and a second secondary winding portion formed by winding the secondary coil by n turns, wherein the n and N satisfy the condition: n≦N. | 09-06-2012 |
20140084790 | ELECTROMAGNETIC INTERFERENCE FILTER, AND POWER SUPPLY APPARATUS AND DISPLAY APPARATUS INCLUDING THE SAME - There are provided an electromagnetic interference filter for removing common mode electromagnetic interference, in which electromagnetic interference of a low frequency band and a high frequency band is removed in a single filter because of a wide block frequency band, a power supply apparatus including the electromagnetic interference filter, and a display apparatus including the electromagnetic interference filter. The electromagnetic interference filter includes a core part including at least two legs electromagnetically coupled and forming a closed magnetic circuit; a coil part including first and second rectangular copper wires respectively wound in a single layer around the at least two legs and removing common mode electromagnetic interference included in power transferred from a power line; and a support part having a mounting area in which the core part having the coil part wound therearound is mounted. | 03-27-2014 |
20150061817 | COIL COMPONENT AND ELECTRONIC MODULE USING THE SAME - A coil component may include: a base board having an accommodation portion disposed therein and having conductive patterns disposed within the accommodation portion; an annular core disposed in the accommodation portion; and a laminated board laminated on the base board and having conductive patterns disposed on one surface thereof. The conductive patterns of the laminated board are connected to the conductive patterns of the base board to form a coil. | 03-05-2015 |
20150070121 | COIL COMPONENT AND METHOD OF MANUFACTURING THE SAME - There are provided a coil component and a method of manufacturing the same. The coil component includes a core; at least one bobbin coupled to the core and having a coil wound therearound; and a base having the core seated therein and including an external connection terminal, wherein one side of the core is seated in the bobbin and the other side thereof is exposed to the outside of the base. | 03-12-2015 |
20150255204 | CHOKE COIL - Disclosed herein is a choke coil including: a core composed of first and second legs, a first flat plate connecting an upper end portion of the first leg and that of the second leg, and a second flat plate connecting a lower end portion of the first leg and that of the second leg; a primary coil wound around the first leg; and a secondary coil wound around the second leg, wherein a width of at least any one of the first flat plate and the second flat plate is greater than widths of the first leg and the second leg. | 09-10-2015 |