Kmw Inc

Gigatera Inc.

Kmw U.s.a., Inc.

Kmw Co., Ltd.

Duk-Yong Kim

Byung-Chul Kim

Nam-Shin Park

Young-Chan Moon

Gil-Ho Lee

Yoon-Bae Lee

Yon-Tae Kim

Jae-Hong Kim

Hyun Ki Kim

Jung-Pil Lee

Jong-Kyu Park

Taek-Dong Kim

Sang-Sig Park

Kwang-Yeob Kim

Sang Cheol Lee

Ki Seong Roh

Min-Soo Kim

Kang-Hyun Lee

Chang-Woo Yoo

Joon-Hong Park

Dong-Sik Roh

Seok Sung

Yoon-Yong Kim

Myoung-Seo Park

Tai-Woo Lee

Jin-Chul Hwang

Sung-Soo Lee

In-Ho Kim

Sung-Ho Jang

Jae Won Kim

Oh-Seog Choi

Jong-hun Lee

Sung-ho Jang

Dong-Hwi Lee

Chi-Back Ryu

Myong-Sik Lee

Min-Sik Park

Seong-Man Kang

Tai Woo Lee

Myeong-Kyu Ryu

Hee-Sung Go

Hyun-Ki Kim

Seung-Bum Yoo

Yeung Jun Kim

Myong-hun Yang

Sung-Hoon Yoon

Hang Ho Shin

Chang-Woo You

Il-Doo Jang

Heang-Suk Choi

Kyoung-Seuk Kim

Myoung-Hoon Yang

Bea-Mook Jeong

Sang-Hyo Kang

Young-Choon Jang

Youn-Chae Lim

Jin-Bae Kim

Yong-Sup Kil

Jong-Ju Han

Gyu-Sang Hwang

In-Young Lee

Tai-Sun Kim

Sang-Wook Bang

Chang-Yun Seo

Kyoung-Ho Lee

Chan-Kyu Yoo

Ik Soo Chang

Byung-Ju Kang

Chang-Yun 401 Ka-Dong Seo

Jong-Sung 303-1706 Kumhwamaeul Jugong Apt Kim

Yoon-Yong 315-304 Cheongmyeongmaeul Dongsin Kim

Young-Chan 105-503 Neulpureun Byucksan Apt Moon

IY 405-1501 Sinyeongtong Hyundai 4-Cha Ap Lee

Light emitting diode (LED) lamp device

The present invention relates to an indirect lighting apparatus using an LED, comprising: a case unit provided along the perimeter of the upper part of a wall surface, and having a light emitting opening on a side opposite to the wall surface; a substrate mounted with an LED and provided at the innermost side of the inner bottom surface of the case unit; a light distributing unit for distributing light to the ceiling through the light emitting opening by reflecting the light emitted from the LED; and a cover unit for covering the light emitting opening of the case unit. The present invention uses a simple structure so that the apparatus is fixedly provided on the wall surface, and can be used as main lighting or mood lighting by providing the distributed light capable of selectively illuminating the entire ceiling.

Indirect LED lihting apparatus having a reflection configuration

A LED streetlamp is provided. The LED streetlamp includes an integral housing having a light-emitting opening that emits light from a bottom surface and an accommodation space; a power supply unit coupled to the accommodation space through the light-emitting opening of the housing; a reflecting part coupled to the accommodation space through the light-emitting opening of the housing to separate power supply unit from the accommodation space of the lower part and reflecting light from a bottom surface thereof; a substrate for supplying power to multiple LEDs coupled to an inner side surface of the housing of a lower side of the reflecting part; and a cover part. A case with a single structure is provided and includes the power supply unit, the substrate having the LEDs and the reflecting plate to be assembled in the case through the light emitting opening to reduce a manufacturing cost.

LED streetlamp

The present invention relates to a fluorescent lamp-type LED lighting device including: a case part formed to be elongated in one direction and having an open bottom surface which provides a reflection space on the inner side; a cover part provided on the bottom surface of the case part so that the light which is reflected and diffused in the case part is emitted; and multiple LEDs which emit the light from the cover part and the inner side of the case part such that the light is reflected and diffused on the inner side of the case part. According to the present invention, the LED light is emitted toward an indoor ceiling side, the reflection space is provided so as to reflect and diffuse the emitted LED light, and the light is emitted through a bottom surface part. Accordingly, no additional diffusion plate for surface emission is used and thus optical efficiency can be increased.

Fluorescent lamp-type LED lighting device

The present invention relates to a detachable LED lighting device, comprising: a lighting module unit which emits light by receiving a power supply, the lighting module unit comprising a substrate including a plurality of LEDs; a connector unit coupled to the lighting module unit, the connector unit having a hitch protrusion on the upper part and having a lower connector for supplying power to the substrate; and a frame unit provided with a connector and a power connector, the connector fixed by being hitched to the hitch protrusion of the connector unit that is inserted into the bottom surface, and the power connector supplying power from an embedded power supply unit to the lower connector. The present invention comprises a frame unit having a power supply unit embedded therein and a lighting module unit which can be easily separated from the frame unit by manipulation of a push button exposed to both ends, with the both ends being fitted and fixed into the frame unit so that the lighting module unit can be more easily detached, thereby reducing the time and cost required for maintenance.

Detachable LED lighting device

The present invention relates to a traffic accident occurrence notification system using LED display lamps, comprising: an emergency message generating unit provided in a mobile means so as to generate a wireless signal in an emergency situation; a plurality of LED display lamps provided together with street lamps provided on a road so as to receive the wireless signal from the emergency message generating unit and display a turned-on or flickering state from a position at which the wireless signal is received to a position at which a distance is set at a rear; and a street lamp control server for controlling the street lamps and the LED display lamps and determining the position at which the wireless signal is received so as to transmit information thereof to a rescue server. The present invention provides the emergency message generating unit in a vehicle so as to detect an accident or enable a driver to recognize an emergency situation and select propagation of the emergency situation, and enables a nearby street lamp to receive the wireless signal when the emergency message generating unit transmits the wireless signal so as to turn on or flicker the LED display lamps such that the LED display lamps located at the rear of a distance set at a corresponding position are turned on or flicker so as to make a driver in a rearward vehicle recognize the occurrence of the emergency situation ahead, thereby preventing the occurrence of a secondary collision accident.

Traffic accident occurrence notification system using LED display lamps

A remote radio head is provided. The remote radio head includes at least one integrated connection terminal for integrating and receiving at least one optical signal with at least one power source, a power supply unit which receives and supplies the power source by converting into an internal driving power source of a corresponding remote radio head, a photoelectric/electrooptic conversion unit for receiving and converting the optical signal into an electric signal, a framer for restoring the electric signal converted in the photoelectric/electrooptic conversion unit according to a preset signal demodulation format, a digital signal processing unit receives a signal outputted from the framer to adjust a waveform and a level in a digital level and a transmission and reception signal conversion module which converts a signal into a high-frequency transmission wireless signal, and amplifies the signal at a high power to output the signal to an antenna side.

Remote radio head

An LED lighting apparatus is provided. The LED lighting apparatus includes a case part which covers a residual part, excluding a light-emitting surface, to provide a reflective space and has a predetermined depth and in which an upper edge of the inside thereof has a slope. Further, a receiving surface has a lateral surface portion of the case part that is bent toward the inside of the case. A substrate is fixed on the receiving surface and a plurality of LEDs are provided. A reflective part located in an upper center portion of the inside of the case part reflects the light of the LEDs and enables reflection and diffusion of light within the reflective space provided from the case part.

LED lighting apparatus

An LED lighting device includes a case unit forming a light emitting space, wherein resting surfaces are formed at predetermined areas on the inner side of the case unit, substrates having LEDs mounted thereon and respectively rested on the plurality of resting surfaces, and heat-dissipating units formed in the outer side of the case unit for heat dissipation. Lifespan and user convenience can be improved.

LED lighting device

A small-sized base station employed in a mobile communication system is disclosed. To this end, the small-sized base station in a mobile communication system, according to one embodiment of the present invention, is a base station device in a mobile communication system comprising: a case which has the shape of a polyhedron and is hollow inside; a housing accommodated inside the case and having the same polyhedron shape as the case; and at least one board which is positioned between the case and the housing.

Small-sized base station device in mobile communication system

An LED lighting apparatus having adjustable light distribution comprises: a support panel on which a plurality of heat dissipation fins are disposed on a back surface thereof, the support panel providing a parallel front part which is not parallel to the ground; a board on which a plurality of LEDs are mounted, and being coupled to said front part of the support panel; and a reflection part fixed to the support panel so as to be disposed on the front surface of said substrate, and reflecting light emitted from said plurality of LEDs to provide a curved reflection surface which forms light distribution patterns on the ground. The light emission surface of the LED is not disposed parallel to the ground. The light emitted from the LED is distributed through the reflection part having a curved surface reflecting the light emitted from the LED toward the ground.

LED lighting apparatus having an adjustable light distribution

Provided is a method for mounting a Printed Circuit Board (PCB). The method includes providing a solder cream on a predetermined region of a bottom surface of the PCB except for a region requiring insulation, mounting the PCB on a mounting region of a housing on which the PCB is to be mounted, and fixedly coupling the PCB to the housing by melting and hardening the solder cream provided on the bottom surface of the PCB.

PCB mounting method

A method for controlling a transmission/reception timing of a BS antenna for TDD wireless communications is provided, in which a control signal and an RF signal are separated from a modulated signal received from a BTS, a TDD synchronization signal is monitored from the received modulated signal, a periodic RF signal is checked from downlink transmission and uplink reception RF signals, an error between the TDD synchronization signal and the periodic RF signal is calculated, and a transmission/reception switching control signal is output according to the error.

Method for controlling transmission/reception timing of base station antenna for TDD wireless communications and base station antenna using the same

Growing community of inventors

Gyeonggi-do, South Korea

Duk-Yong Kim