Electronics and Telecommunications Research Institute

Sungwon Sohn

Myungae Chung

Taewan Kim

Daeho Kim

Jongsoo Jang

Sangkyu Lim

Jonghyun Kim

Taegyu Kang

Beomhwan Chang

Chiyoon Jeong

Geonlyang Kim

Jongho Ryu

Jungchan Na

Seongyoung Sohn

Sanghyeob Kim

The visible light communication apparatus includes: a brightness signal generator that calculates a duty cycle of an driving signal corresponding to brightness requirement information and generates clock frequency information on brightness signals based on the calculated duty cycle; a transmission data generator that generates transmission data; an illumination driver that generates and outputs an driving signal in a pulse waveform based on the clock frequency information of the brightness signals and the transmission data and controls a pulse position of a turn on section for each bit unit time in the waveform of the driving signal based on the transmission data; and an illumination that is operated according to the driving signal from the illumination driver.

Visible light communication apparatus and visible light communciation method

Disclosed is an apparatus for displaying the state of a network to enable a user to intuitively recognize a network security situation. The disclosed apparatus for displaying the state of a network includes: a security event collecting unit that collects security events from the outside; an IP address converting unit that converts a source IP address and a destination IP address in characteristic data of the collected security events into geographic information on the basis of information stored in a geographic information database; and a network state display unit that displays the flow of security events for each protocol between a source and a destination as an image including a globe shape, on the basis of the characteristic data and the geographic information transmitted from the IP address converting unit.

Apparatus and method for visualizing network state by using geographic information

Disclosed is a flexible energy conversion device, comprising a first flexible substrate, a transparent electrode disposed on the first flexible substrate, a first nanostructure disposed on the transparent electrode and comprising a transition metal oxide or semi-metal oxide, a second nanostructure disposed on the first nanostructure, a second flexible substrate disposed on the second nanostructure, and a sealing layer for sealing the first flexible substrate an the second flexible substrate. A method of manufacturing the flexible energy conversion device is also provided.

Flexible energy conversion device

Growing community of inventors

Daejeon, South Korea

Sungwon Sohn