Samsung Electronics Co., Ltd.

Yungjin Pharm Co., Ltd.

Jeonnam Bioindustry Foundation

Opto Electronics Solutions

Hyun Jea Kim

Jae Ho Choi

Eung Ryeol Seo

Dong Wook Lee

Dong Jin Shin

Joo Yong Lee

Hyeon Joon Oh

Kwang Su Heo

Chul Yung Choi

Sang O Pan

Jin Hyung Park

Gyu Ok Lee

Sun Oh Kim

Jae Gap Kim

Dong Suk Ko

Sang Won Lee

Hee Jin Seol

Wook Jin Jang

Hee Sook Kim

Min Soo Han

Ka Hyon Park

Hye Soo Ma

Ki Young Yang

Provided is a multi-channel, bi-directional optical communication module. The multi-channel, bi-directional optical communication module includes a transmission unit transmitting an optical transmission signal for each of a plurality of channels, a multiplexer multiplexing the transmitted optical transmission signal for each of the plurality of channels to output a multi-channel optical transmission signal, a circulator passing the multi-channel optical transmission signal output from the multiplexer therethrough to transmit the multi-channel optical transmission signal to an optical fiber and reflecting a multi-channel optical reception signal received from the optical fiber, a demultiplexer demultiplexing the multi-channel optical reception signal reflected from the circulator to output an optical reception signal for each of the plurality of channels, a reception unit receiving the output optical reception signal for each of the plurality of channels and converting the received optical reception signal into an electrical signal for each of the plurality of channels, and a body unit in which the transmission unit, the multiplexer, the circulator, the demultiplexer, and the reception unit are disposed, in which a wavelength of the optical transmission signal for each of the plurality of channels is the same as a wavelength of the optical reception signal for each of the plurality of channels, and the circulator includes a first optical filter which passes a multi-channel optical transmission signal incident to a surface thereof therethrough and reflects a multi-channel optical reception signal incident to the other surface thereof, and a second optical filter which is disposed in parallel with the first optical filter and reflects the multi-channel optical reception signal reflected from the first optical filter to the demultiplexer.

Multi-channel, bi-directional optical communication module

A cleaning device includes an inhalation unit to generate inhalation force to inhale air into a main body, the inhalation unit comprising: an impeller that is rotatable; an impeller cover having an inlet damper formed therein; and a return channel that is coupled to the impeller cover so that the impeller is capable of being accommodated in the return channel and that is directly coupled to the impeller so that air passing through the impeller is capable of being introduced into the return channel, the return channel comprising: an inner frame; and an outer frame at an outer side of the inner frame so as to be spaced apart from the inner frame.

Cleaning device

Disclosed is an antipyretic drug comprising aleaf extract as an active ingredient. The antipyretic drug is developed based on the finding that theleaf extract has no cytotoxicity and exhibits superior antipyretic effects, as compared to conventional antipyretic drugs having antipyretic effects. An antipyretic composition comprising theleaf extract as an active ingredient exhibits potent antipyretic effect.

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Growing community of inventors

Gwangju, South Korea

Hyun Jea Kim