Point Tek Co., Ltd.

Hyundai Motor Company

Bs Technics Co., Ltd.

Kia Motors Corporation

Kia Corporation

Hyundai Mobis Co., Ltd.

Nifco Korea Inc.

Industry-academic Cooperation Foundation, Dankook University

Korea Electric Terminal Co., Ltd.

Alps Electric Korea Co., Ltd.

Jun Sik Kim

Young Do Kim

Shi Hong Park

Jung Sik Choi

Jae Hyun Park

Sun Woo Kim

Hee Jun Lee

Seung-Sik Han

Sang Hyun Jang

Sun-Mi Oh

Hong-Sik Chang

Jin-Won Lee

Kwan-Woo Lee

Young-Ju Lee

Jong-Eun Park

Cheon-Ho Kim

Sae-Ah Kim

Won-Il Lee

Young-Jai Im

Dae-Woo Park

Tae Kyoung Jung

Jong-Chae Lee

Jong-Hyun Park

Jun-Hyun Park

Kwang-Pyo Cho

Tae Yeon Jo

Jun-Geun Oh

Kang-Sun Lee

AC (alternating current) direct driving circuit device for uniformity of multi-channel light emitting diodes includes: a power supply unit that applies AC voltage; a light emitting unit including a plurality of light emitting diodes which are connected in series and emit light by current according to the voltage applied by the power supply unit; a switch unit including a plurality of switch modules which are formed on a plurality of conductive lines connecting input nodes of two different light emitting diodes among the plurality of light emitting diodes and distribute an amount of the current flowing in each of the light emitting diodes by turning on or off according to an increase or decrease in the amount of the current; a distribution resistance unit including a plurality of distribution resistors for distributing the amount of the current; and a driving unit that controls the amount of the current flowing in each of the plurality of light emitting diodes by selectively connecting the current flowing in each of the plurality of light emitting diodes to at least one of the plurality of distribution resistors.

AC direct driving circuit device for uniformity of multi-channel light emitting diodes

Disclosed is a method of manufacturing an insulating sheet, comprising: forming at least a groove on a flat sheet; a first cutting step for cutting a side surface of the groove by irradiating a laser beam to a side surface of the sheet; a second cutting step for cutting the insulating sheet to completely separate the groove from the insulating sheet by irradiating a laser beam from above the groove having the side surface cut; a tape attaching step for attaching a tape to an outer surface of the insulating sheet; and a bending step for bending one end portion of the surface of the insulating sheet having the tape attached toward a place where the tape is attached. It is possible to mass-produce the insulating sheets having a three-dimensional shape, regarded as being difficult to manufacture with a mold.

Method and apparatus for manufacturing insulating sheet

A light-emitting diode (LED) lamp for a vehicle and a method of manufacturing the same use MID and magnetic induction technologies. The LED lamp includes a LED module, a housing accommodating the LED module, and a molded interconnect device (MID) electrode formed on a surface of the housing. The LED module may be mounted on the MID electrode by soldering using magnetic induction heating, the housing may be an injection molded product, and the MID electrode may be formed on the housing using a MID process.

LED lamp for a vehicle and a method of manufacturing the same using mid and magnetic induction technologies

Provided is an apparatus for supplying power. The apparatus includes a rectifier unit configured to apply a voltage by rectifying alternating current power source, a light emitting unit including a plurality of light emitting diodes which emit light by electric current according to the voltage and are connected in series, a signal generation unit configured to generate a driving signal by dropping the voltage of the rectifier unit, and a switch unit including a plurality of transistors which are connected to the plurality of light emitting diodes, respectively, and are turned on by the driving signal and switch a route of electric current flowing in the plurality of light emitting diodes to be supplied to a microcontroller as power source.

Apparatus for supplying power to drive alternating current (AC) direct-coupled light-emitting diodes (LED)

Disclosed herein is a AC direct LED driving apparatus. The light emitting diode (LED) driving apparatus includes: a rectifier configured to receive and rectify an alternating current (AC) voltage; an LED configured to emit light based on a rectified voltage received from the rectifier; a capacitor connected to a first terminal of the LED, and configured to drive the LED while alternating between charging and discharging sections according to a preset cycle; a first current driver connected to a second terminal of the LED and configured to control a path of current flowing in the LED and the capacitor based on different input voltage levels; a second current driver configured to control charging and discharging of the capacitor; and a first diode connected onto a current path of the capacitor and the second current driver, and configured to form a discharging path for driving the LED based on a charged voltage of the capacitor.

AC direct LED driver including capacitor for LED driver

A power switch capable of preventing a reverse connection is provided. The power switch includes a switch that is configured to supply power of a battery to a load or block the power of the battery and a protector that is connected to an output terminal of the switch and blocks the power applied from the battery when the battery is reversely connected and a driver is configured to operate a driving of the switch and the protector.

Power switch capable of preventing reverse connection

Growing community of inventors

Chungcheongbuk-do, South Korea

Jun Sik Kim