Korea Advanced Institute of Science and Technology

Samsung Electronics Co., Ltd.

Sk Innovation Co., Ltd.

Samsung Display Co., Ltd.

Hyundai Motor Company

Kia Motors Corporation

Samsung Sdi Co., Inc.

Samsung Electro-mechanics Co., Ltd.

Gun-Woo Moon

Chol-Ho Kim

Sang Hyun Park

Joong Hui Lee

Jae Hwan Lim

Keon-Woo Kim

Hong-Sun Park

Moo-Hyun Park

Jae-Ii Baek

Jung-Kyu Han

Seung-Hwan Moon

Woo Young Lee

Jin-Ho Kim

Sang-Wook Kwon

Ki-Young Kim

Kyungmin Lee

Do-wan Kim

Byoung Own Min

Moon-Shik Kang

Jaehyuk Choi

Jun-Bo Yoon

Eun-Seok Choi

Byoung-Hee Lee

Won-Sik Oh

Jong Sun Kim

Ji-Hoon Jung

Nam-Deog Kim

Mun-Soo Park

Bong-Chul Kim

Hong Sun Park

Jheen-Hyeok Park

Hee-Hwan Kim

Hyun-Bae Kim

Koeng Su Lim

JongPil Kim

Jeong Hwan Yang

Sang Il Park

Seong Won Kwon

Kiyoung Kim

Dongmin Kim

Cheon-Yong Lim

Suok Gyu Min

Won Sik Oh

Jeong Hwan Kwak

Jaeil Baek

Young-Dal Lee

Hyun-Ki Yoon

Myung-Joong Youn

Chong-Eun Kim

Chul-Su Hong

Kyu-Min Cho

Dae-Youn Cho

Joonghui Lee

Shin-Young Cho

Moon-Young Kim

Jae-Il Baek

HanShin Youn

Jong-Woo Kim

Seung-Hyun Choi

According to various embodiments, a wireless power transmission device may comprise: a coil circuit configured to generate a power signal for power transmission to an electronic device; an inverter configured to convert direct current power to alternating current power and to provide the alternating current power to the coil circuit; a coil-type detection unit comprising a coil disposed to be adjacent to the coil circuit and configured to detect a signal corresponding to the power signal; and a control circuit configured to adjust, based on the detected signal, a switching frequency of the inverter to change the alternating current power output from the inverter.

Method for performing wireless charging, wireless power transmission device, and storage medium

Disclosed is an asymmetrical half-bridge converter having high efficiency in a wide input voltage range. The converter may include a primary-side circuit including a first switch, a second switch, a primary-side capacitor, an additional inductor, and a primary-side magnetization inductor, and a secondary-side circuit including first and second diodes connected in series, first and second capacitors connected in series, a secondary-side rectification inductor having one end connected to the anode of the first diode and cathode of the second diode, and having the other end connected between the first and second capacitors connected in series, a first coupling inductor having one end connected to the cathode of the first diode and having the other end connected to the first capacitor, and a second coupling inductor having one end connected to the anode of the second diode and having the other end connected to the second capacitor.

Half-bridge converter including rectifier structure using coupling inductor

Disclosed are an electric vehicle capable of improving the charging efficiency of a charging apparatus by reducing the switching loss that may occur in the charging apparatus of an electric vehicle and a charging apparatus thereof. To this end, a power factor correction apparatus of an on board charger includes a first boost circuit receiving AC power through a first inductor to charge a load, a second boost circuit receiving the AC power through a second inductor to charge the load, and a third inductor provided between a leg of the first boost circuit and a leg of the second boost circuit so that parasitic capacitors of the first boost circuit and the second boost circuit are discharged.

Electric vehicle and charging apparatus thereof

A discrete capacitance switching circuit includes a DC decoupling capacitor connected between a power node that receives an AC signal and a first node, a diode connected between the first node and a second node, a unit capacitor connected between the second node and a reference node that receives a ground voltage, and a bias circuit. The bias circuit is configured to apply a first DC voltage to the first node and apply a second DC voltage to the second node. The applied first and second DC voltages control a switching operation of the diode.

Discrete capacitance switching circuit and capacitor array circuit including the same

Provided are a charge equalization apparatus for a battery string. According to the exemplary embodiments of the present invention, the charge equalization apparatus are modularized by being divided into the master unit and the slave unit, such that the charge equalization apparatus may be expanded and contracted independent of the number of batteries, the circuits are separated for each module, such that the circuits may be easily implemented, and when the circuits are damaged, only the damaged module is replaced, such that the effective countermeasure may be performed.

Charge equalization apparatus for a battery string

The present invention relates to an electronic device and a method for controlling a charging operation of a battery. The charging control method includes charging a battery using a first charging mode, if a current voltage of the charged battery coincides with a predetermined voltage, decreasing an intensity level of a charging current and charging the battery using the decreased charging current intensity, and if the decreased charging current intensity coincides with a predetermined current intensity, converting from the first charging mode to a second charging mode and charging the battery using the second charging mode.

Electronic device and method for controlling charging operation of battery

Provided are a charge equalization apparatus and method for a battery string connected in series, and more particularly, are a charge equalization apparatus and method that efficiently perform charge equalization while reducing entire complexity and volume and lowering production costs through a configuration that an individual battery included in a battery string shares a single voltage sensing module and a single charge equalizing module; a switch block of a two-stage structure forms a current path for measuring voltage of individual batteries included in the battery string, and at the same time, forms a charging or discharging path of a low-charged or over-charged battery among the battery strings; and a switch device having low withstand voltage is used.

Charge equalization apparatus and method for series-connected battery string

A two-stage charge equalization apparatus for a series-connected battery string having a two-stage DC-DC converter including a first DC-DC converter; and a second DC-DC converter which is inputted. A battery string is divided into one or more battery modules having a plurality of battery cells connected in series, and a current conversion switch module forms a path of the charge current between the battery module and the second DC-DC converter to allow the charge current to be applied to the particular battery cell composing the battery module and controls an application direction of the charge current. A microprocessor determines a battery cell to be charged of a low-charged battery cell and controls the current conversion switch module to allow the charge current to be applied to the battery cell to be charged.

Two-stage charge equalization method and apparatus for series-connected battery string

An automatic charge equalization apparatus using a regulated voltage source according to the present invention comprises a battery module having a plurality of batteries connected in series; a battery string having M (natural number of M&#x2267;2) battery modules connected in series: a regulated voltage source which is provided for each battery module and outputs and maintains an average voltage of the battery string; a bidirectional switch block which is provided for each battery module between the battery module and the regulated voltage source to connect each battery to an output of the regulated voltage source by forming a parallel current moving path to each battery composing the battery module; and a microprocessor controlling the bidirectional switch block, wherein each battery composing the battery module shares the regulated voltage source by the bidirectional switch block and the microprocessor controls the bidirectional switch block to successively connect the batteries composing the battery module with the regulated voltage source.

Charge equalization apparatus for series-connected battery string using regulated voltage source

A backlight unit of a liquid crystal display device supplies light to one or more corresponding pixels of a liquid crystal display panel. The backlight unit includes a plurality of blocks formed into a matrix shape. Each block includes a light emitting diode module. The blocks in a row of the matrix are driven by a same row driving signal and the blocks in a column of the matrix are driven by a same column driving signal, to adjust luminance of the light supplied to the corresponding pixels.

Backlight unit, liquid crystal display device including the same, and localized dimming method thereof

The present invention relates to integrated thin film solar cells, and more particularly, to integrated thin film solar cells, which minimize the loss of integrated solar cells caused at the time of a manufacturing process and become available at a low cost process, and a method of manufacturing thereof, a processing method of a transparent electrode for integrated thin film solar cells, which widens an effective area and reduces manufacturing costs by minimizing a (insulating) gap between unit cells of the integrated thin film solar cells, and a structure thereof, and a transparent substrate having the transparent electrode. The method of manufacturing integrated thin film solar cells, comprising the steps of: (a) forming a transparent electrode pattern separately over a transparent substrate; (b) forming a solar cell (semiconductor) layer over the substrate of the step (a); (c) forming a first back electrode by obliquely depositing a conductive material over the solar cell (semiconductor) layer; (d) etching the solar cell (semiconductor) layer by using the first back electrode as a mask; and (e) forming a second back electrode so that the transparent electrode and the first back electrode are electrically connected by obliquely depositing a metal over the substrate of the step (d).

Integrated thin-film solar cells and method of manufacturing thereof and processing method of transparent electrode for integrated thin-film solar cells and structure thereof, and transparent substrate having processed transparent electrode

A soft start circuit is connected to a pulse width modulation controller including an oscillator, and a functionality of modulating amplitude to a pulse width and a power supply includes the soft start circuit. The soft start circuit includes a frequency controlling unit, a duty ratio establishing unit, and a variable switching unit. The frequency controlling unit generates first and second parameter signals for determining a frequency signal frequency by a power source from the PWM controller and provides them to the PWM controller. The duty ratio establishing unit generates a third parameter for determining amplitude of the frequency signal generated by the PWM controller according to a reference voltage, and provides it to the PWM controller. The variable switching unit determines whether it is a first predetermined time from a start-up state, and controls the first parameter of the frequency controller during the first predetermined time.

Soft start circuit and power supply including soft start circuit

A lamp driving device includes first, second, and third voltage converters. The first voltage converter converts a direct current (DC) power voltage to a first pulse voltage. The second voltage converter converts the DC power voltage to a second pulse voltage. The third voltage converter generates a high alternating current (AC) voltage based on the first and second pulse voltages. The lamp driving device generates the high AC voltage without a transformer, so that a manufacturing cost of a display apparatus adopting the lamp driving device may be reduced.

Lamp driving device and display apparatus having the same

A driving method of external electrode fluorescent lamp inverter for backlight. In the driving method, a square wave voltage frequency for driving the external electrode fluorescent lamp is applied to the primary side of a transformer in the region whose frequency is substantially &#xbd; of the resonant frequency which is determined by the capacitance of the external electrode fluorescent lamp and the leakage inductance of the transformer. Then, the external electrode fluorescent lamp is caused to emit light by the self-discharge to thereby obtain high efficiency and high luminance. The driving method of external electrode fluorescent lamp inverter for backlight includes applying a square wave voltage for driving an external electrode fluorescent lamp to the primary side of a transformer; and applying the square wave voltage to the primary side of transformer in a region where the frequency thereof is substantially &#xbd; of a resonant frequency, which is determined by the capacitance of the external electrode fluorescent lamp and the leakage inductance of the transformer, and thus causing the external electrode fluorescent lamp to emit light by the self-discharge.

Driving method of external electrode fluorescent lamp inverter for backlight

Growing community of inventors

Daejeon, South Korea

Gun-Woo Moon