Patent application number | Description | Published |
20130106296 | DEVICE FOR DRIVING LIGHT EMITTING DIODE | 05-02-2013 |
20130138370 | BATTERY STATE-OF-CHARGE ESTIMATION METHOD AND BATTERY MANAGEMENT SYSTEM - Provided are a battery state-of-charge (SOC) estimation method and a battery management system which are capable of estimating an SOC using an inexpensive processor and a small-capacity memory. The SOC estimation method includes an SOC table creation step, an SOC calculation step, an SOC comparison step, and a processing step. The battery management system includes a battery, a sensing resistor, a control switch unit, and a processor. | 05-30-2013 |
20130166235 | MANAGEMENT SYSTEM AND ESTIMATING METHOD FOR BATTERY PARAMETER - The present invention relates to a battery parameter management system and a battery parameter estimation method which are capable of simply estimating parameters of elements forming a battery equivalent model having a simple structure. The battery parameter system includes an amperemeter, a voltmeter, a control switch unit, and a processor, and the battery parameter estimation method includes supplying a pulse current, estimating resistance of an internal resistor, estimating capacitance of an internal capacitor, and estimating parameters of dynamic elements. | 06-27-2013 |
20130320868 | LED LIGHTING APPARATUS AND CONTROL CIRCUIT THEREOF - 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. | 12-05-2013 |
20140070757 | CELL BALANCING INTEGRATED CIRCUIT, CELL BALANCING SYSTEM, AND CELL BALANCING METHOD - Introduced are a cell balancing integrated circuit which may be realized including a small number of switches or diodes, an energy non-consumption type cell balancing system including the cell balancing integrated circuit, and an energy non-consumption type cell balancing method. The energy non-consumption type cell balancing system includes a battery pack, a cell balancing circuit, and a plurality of inductors and capacitors. | 03-13-2014 |
20140077715 | SYSTEM CONTROL UNIT, LED DRIVER INCLUDING THE SYSTEM CONTROL UNIT, AND METHOD OF CONTROLLING STATIC CURRENT OF THE LED DRIVER - Embodiments of the present invention provide a light-emitting diode (LED) driver for controlling a static current supplied to an LED array connected to a secondary coil of a transformer by using the peak values of currents flowing through a power transistor, which may reside in a switching element connected to a primary coil of the transformer. In some embodiments, the LED driver is configured to control the static current that flows through the LED array using an AC voltage supplied to the primary side of the transformer. In some embodiments, the LED driver includes a power conversion unit, a switching unit, a transformer, and a system control unit. In some embodiments, the method of controlling the static current of the LED driver includes a current peak value detection step, a step output current calculation step, a static current mean value calculation step, and a gate control signal update step. | 03-20-2014 |
20140111108 | SYSTEM CONTROL UNIT, LED DRIVER INCLUDING THE SYSTEM CONTROL UNIT, AND METHOD OF CONTROLLING STATIC CURRENT OF THE LED DRIVER - Embodiments of the present invention provide a light-emitting diode (LED) driver and method of controlling the static current of the LED driver. In some embodiments, the LED driver is configured to calculate output currents of a pulse form using a small number of parameters and adjust a gate control signal using the mean value of the output currents of a pulse form. Accordingly, the LED driver can be used to control a static current that flows through an LED array connected to a circuit on the secondary side of a transformer using a DC voltage or an AC voltage supplied to the primary side of the transformer. In some embodiments, the LED driver includes a power conversion unit, switching unit, transformer, zero current detection unit, and system control unit. In some embodiments, the system control unit is configured to adjust the gate control signal. | 04-24-2014 |
20150048744 | LIGHT EMITTING DIODE DRIVING CIRCUIT AND LIGHT EMITTING DIODE ILLUMINATION APPARATUS INCLUDING THE SAME - A LED driving circuit drives a plurality of LED (Light Emitting Diode) groups, has a common voltage that is changed according to an input voltage of the plurality of LED groups, and includes a common node, a plurality of phase switches arranged between the output terminals of the plurality of LED groups and the common node, and a plurality of phase switch control units that form current flows among a corresponding LED group, a corresponding phase switch, and the common node in phase sections of the input voltage based on the common voltage and a corresponding reference voltage, the input voltage having a time-variable phase. Accordingly, the LED driving circuit can correct a power factor without using an inductor or a capacitor. | 02-19-2015 |
Patent application number | Description | Published |
20100248503 | CONNECTOR CAPABLE OF COUPLING TO PRINTED CIRCUIT BOARD - A connector capable of being connected to a printed circuit board (PCB) is provided. A female connector according to an embodiment of the present invention includes a core conductor, a body, and a housing. The core conductor is formed of a single body including a contact terminal formed of two or more insertion panels forming an insertion space where a signal pin of a male connector is inserted and a signal transmission panel connected to a bottom of the contact terminal and electrically connected a signal line of the PCB. The body includes an insertion part electrically insulated from the core conductor and gaping when coupling with the male connector and is formed in a single body including a trunk surrounding the contact terminal and a plurality of supporters connected to a bottom of the trunk. The housing stores the core conductor and the bottom of the trunk of the body or more. | 09-30-2010 |
20100314159 | PRINTED CIRCUIT BOARD - The present disclosure provides a printed circuit board (PCB) comprising a first ground layer extended in one direction a first dielectric layer laminated on the first ground layer and extended in the same direction as that of the first ground layer; a signal transmission line laminated on the first dielectric layer and extended in the same direction as that of the first dielectric layer; and a plurality of first ground patterns formed by etching a surface of the first ground layer in an axial direction thereof at a predetermined interval in a line, wherein the plurality of first ground patterns expose the first dielectric layer. | 12-16-2010 |
20110030995 | Printed Circuit Board Removing Bonding Sheet Around Signal Transmission Line - There is provided a printed circuit board (PCB) comprising a first ground layer extended in one direction; a first dielectric layer laminated on the first ground layer and extended in the same direction of the first ground layer; a signal transmission line laminated on the first dielectric layer and extended in the same direction of the first dielectric layer; a first bonding sheet disposed above the first dielectric layer; a second bonding sheet disposed above the first dielectric layer, a second dielectric layer disposed above the signal transmission line, the first bonding sheet, and the second bonding sheet; and a second ground layer laminated on the second dielectric layer. | 02-10-2011 |
20110031991 | PROBE BLOCK - A probe block mounted on a probe card is provided for achieving fine pitch probes. A probe block for a probe card of a semiconductor test device according to the present invention includes a guide member and a probe. A guide member includes pairs of upper and lower holes and middle holes each interconnecting the upper and lower holes of each pair. A probe includes a first pin tip protruded through a corresponding upper hole for contacting a pad of a device to be tested and a second pin tip protruded through a corresponding lower hole for transferring an electrical signal to the device and a bridge part situated within the middle hole for interconnecting the first and second pin tips. The upper, lower, and middle holes allow the probe to elastically moves in vertical direction. The probe block of the present invention is advantageous in that the probes are supported by guide members so as not to be bent while maintaining a fine pitch. Also, the probe block of the present invention is advantageous in fabrication and repair since probes are elastically contacted rather than directly bonded to the circuit substrate of the probe card. | 02-10-2011 |
20110121851 | PROBE CARD - A probe card of a semiconductor test apparatus having a plurality of space transformers supporting probe units of the probe card is provided. A probe card of the present invention includes a plurality of probe units, each comprising a guide member and at least one probe secured by the guide member and contacting a chip pad to be tested; a plurality of space transformers arranged below the respective probe units, each space transformer having wires electrically connected to lower terminals of the probes; a frame having a plurality of guide holes for fixedly positioning the respective probe units; an interposer array arranged below the space transformers for supporting the space transformers, interposer array comprising electrical connection means for supplying test signals to the wires of the space transformers; and a printed circuit board arranged below the interposer array for supporting the interposer array and electrically connected to the electrical connection means for supplying the test signals. In the probe card of the present invention, the probe units are independently supported by respective space transformers such that it is possible to reduce thermal distortion of the probe card and simplifying the manufacturing and repairing processes. | 05-26-2011 |
20120006582 | FLEXIBLE BOARD FOR TRANSMITTING SIGNALS - Provided is a flexible board for transmitting signals which includes: a dielectric on which different signal lines are respectively disposed on independent separation regions on opposite surfaces of opposite sides thereof; a metallic shielding portion that is spaced apart from each other at intervals at a boundary between the separation regions and shields interference between the different signal lines; and a ground conductive layer that is formed on a portion of the dielectric and is electrically connected to the metallic shielding portion. | 01-12-2012 |
20120009812 | CONNECTOR MOUNTED ON PRINTED CIRCUIT BOARD - There is provided a micro connector mounted on a printed circuit board (PCB) comprising a core conductor including a contact terminal formed of two or more insertion panels and a signal transmission panel; body including a trunk formed in the shape of a barrel surrounding the contact terminal, and one or more projection arms extended from a bottom of the trunk; a dielectric; and a tail including a bottom panel disposed opposite to the signal transmission panel, interposing the body therebetween, and supporting the dielectric. | 01-12-2012 |
20120074979 | PROBE BLOCK - There is provided a probe block comprising a probe including first contact portions, second contact portions, and beams connecting the first contact portion to the second contact portion and a guide where the probe is inserted and supported, wherein the probe block is installed in a probe card for inspecting a semiconductor chip. | 03-29-2012 |
20120295455 | GROUNDING UNIT FOR HIGH-FREQUENCY CONNECTOR AND HIGH-FREQUENCY CONNECTOR MODULE HAVING THE SAME - A grounding unit for a high-frequency connector is provided, wherein the grounding unit may include a grounding unit body configured to be selectively fixed to the high-frequency connector; and a grounding fixation unit configured to be connected to the grounding unit body, to be in pressure contact with a grounding region of a printed circuit board (PCB) under elastic force applied in proportion to a thickness of the PCB, and to electrically connect the high-frequency connector to the grounding region. | 11-22-2012 |
20120306523 | PROBE CARD - There is provided a probe card comprising a plurality of probe tips, each being ball-shaped or pillar-shaped and having a top end in contact with each of target chip pads to be tested; a first space converting unit; a second space converting unit; a frame configured to support the second space converting unit; an interposer unit; and a circuit board. | 12-06-2012 |
20140154906 | Connector for Preventing Unlocking - Disclosed is a connector for preventing unlocking which includes a signal pin transferring a signal; a body into which the signal pin is inserted and which is electrically isolated from the signal pin; a first housing having a hollow portion into which one end of the body is inserted, a thread groove and at least one protruding portion or a plurality of fixing grooves formed at an inner circumferential surface of the other end thereof; and a second housing having a hollow portion into which the other body end is inserted and through which the second housing is moved along an outer circumferential surface of the body in an axial direction. | 06-05-2014 |