Dae-Ung

Dae-Ung Kim, Daejeon-City KR

Patent application number	Description	Published
20110026923	APPARATUS AND METHOD FOR OLT AND ONU FOR WAVELENGTH AGNOSTIC WAVELENGTH-DIVISION MULTIPLEXED PASSIVE OPTICAL NETWORKS - In a Wavelength-Division-Multiplexed Passive Optical Network (WDM-PON) utilizing a conventional downstream optical signal reusing method, there is an inventory problem that different optical transmitter types need to be provided for the operation, management, replacement, etc. of a system. A WDM-PON system according to the present invention, includes: a seed light (SL) unit generating a seed light whose wavelength intervals and center wavelengths are adjusted using at least one seed light source; an optical line terminal (OLT) receiving the wavelength-multiplexed seed light from the seed light unit, transmitting a downstream optical signal to a subscriber of the WDM-PON, and receiving a upstream optical signal from the subscriber; and an optical network unit (ONU) receiving the downstream optical signal from the OLT, flattening and modulating the downstream optical signal with upstream data so that the downstream optical signal is reused for carrying upstream data. It is possible to improve the quality and reliability of downstream transmission by sufficiently increasing an extinction ratio, and improve the quality and reliability of upstream transmission by sufficiently flattening an input downstream optical signal in a semiconductor optical amplifier.	02-03-2011

Patent application number	Description	Published
20100178552	BATTERY CASE COVER - Provided is a battery case cover which can be produced through a single process, by integrally forming the structural components of a battery case cover such as a recovering part, a cell partition part and a gas inlet part on the bottom surface, while forming the recovering part in the shape of a pipe and applying a vent cap mode to the gas inlet part.	07-15-2010

Patent application number	Description	Published
20100180647	LOCKING APPARATUS - A locking apparatus having a clipping mechanism is provided. The locking apparatus includes: a main body including upper and lower pressing portions defining a gripping space and a support or connecting member supporting or connecting the upper and lower pressing portions and providing a gripping force to the upper and lower pressing portions; an opening/closing member that is affixed to the main body and transmits a force to the upper and lower pressing portions so that the upper and lower pressing portions may open; and a cover member enclosing the main body and controlling a force for opening the upper and lower pressing portions. The locking apparatus can be widely applied to usefully lock or secure personal articles vulnerable to privacy intrusions such as a bag, a notebook, a planner/diary, and a book and an electronic dictionary, a gaming machine or other electronic devices vulnerable to theft.	07-22-2010