| Patent Number |
Title Of Patent |
Date Issued |
| 8204383 |
Wireless communication interface for portable wireless terminal |
June 19, 2012 |
| A wireless communication interface for a portable wireless terminal and a system for wirelessly communicating by a portable wireless terminal with another device via a free space. The interface facilitates aligning the portable wireless device with another devices for improved communicat |
| 8117006 |
Method for measuring position of portable terminal and indoor illuminating apparatus for the sam |
February 14, 2012 |
| Provided is a method of measuring the position of a portable terminal, comprising detecting indoor illuminating light, and outputting an electric signal corresponding to the detected indoor illuminating light, obtaining a plurality of data frames from the output electrical signal, an |
| 8059112 |
Apparatus and method for broadcasting visible light information in visible light communication |
November 15, 2011 |
| Provided is a method for broadcasting visible light information in visible light communication. The method includes determining a time interval for a simultaneous signal and a time interval for an individual signal of information to be displayed on a display device; simultaneously mo |
| 8019230 |
Method for providing visible light communication in a visible light communication system |
September 13, 2011 |
| A method of providing a visible light communication in a data link layer of a visible light communication system adopting an infrared communication link connection protocol includes: broadcasting a discovery exchange station identification (D-XID) frame; generating a visible frame to |
| 8005366 |
Reconnection method in peripheral interface using visible light communication |
August 23, 2011 |
| A reconnection method and device for a peripheral interface using VLC provide a protocol for when a communication link between a primary device and a secondary device is disconnected. The primary device generates an R-XID message including reconnection information and a warning indicatio |
| 7783198 |
Passive optical network |
August 24, 2010 |
| A passive optical network includes: a central office for generating multiplexed downstream optical signals and receiving an upstream optical signal; a plurality of optical network units for receiving a corresponding downstream optical signal and generating subcarrier channels carryin |
| 7663501 |
Apparatus and method of controlling emitting color of visible light according to a current commu |
February 16, 2010 |
| An apparatus and method for controlling the emitted color of visible light according to the current communication state in a visible light communication (VLC) device. The method includes storing one or more communication states and emitting colors that are correspondingly matched to |
| 7639949 |
TDM PON and dynamic bandwidth allocation method thereof |
December 29, 2009 |
| A TDM PON including: an optical line terminal; a remote node including multiple secondary optical distributors connected to multiple optical network units; and the multiple optical network units generating and outputting a corresponding upstream optical signal. Each of the secondary |
| 7415205 |
Wavelength division multiplexed self-healing passive optical network using wavelength injection |
August 19, 2008 |
| A wavelength division multiplexed self-healing passive optical network using a wavelength injection method includes a central office for coupling modulated multiplexed optical signals (MMOS) and broadband optical signals (BOS)for an upstream light source into one signal transmitted t |
| 7398021 |
Optical transmitter and passive optical network using the same |
July 8, 2008 |
| An optical transmitter including a multi-lambda source to output injection light consisting of a plurality of injection wavelengths in channels, a circulator having a first port, a second port, and a third port, the circulator receiving the injection light at the first port, and outp |
| 7369588 |
Broad-band optical semiconductor device and a method for manufacturing the same |
May 6, 2008 |
| Disclosed is an optical semiconductor device that provides an optical gain or optical loss depending on application of electric current. The optical semiconductor device comprises: a lower clad layer; an active layer disposed on the lower clad layer, the active layer generating optical |
| 7254340 |
Apparatus and method for tracking optical wavelength in WDM passive optical network using loop-b |
August 7, 2007 |
| An optical wavelength tracking apparatus and method in a wavelength division multiplexed (WDM) passive optical network (PON) in which a central office (CO) having a multi-frequency light source is connected to a plurality of optical network units (ONUs) having loop-back light sources |
| 7228021 |
Bidirectional optical add/drop multiplexer and wavelength division multiplexed ring network usin |
June 5, 2007 |
| Disclosed is a bidirectional optical add/drop multiplexer that includes a first filter for reflecting a first optical signal pre-selected among input forward optical signals and transmitting the remaining forward optical signals, a second filter for reflecting a second optical signal |
| 7224519 |
Low noise multi-wavelength light source and wavelength division multiplexing system using same |
May 29, 2007 |
| A multi-wavelength light source includes a substrate, a fabry-perot laser laminated on the substrate that is operated by driving current below a predetermined threshold current to generate multi-wavelength light including a plurality of peaks whose wavelengths and spacing are identic |
| 7209609 |
Light source apparatus for WDM optical communication and optical communication system |
April 24, 2007 |
| A light source apparatus for use with optical communication using external-injection light sources, and an optical communication system using the light source apparatus. The light source apparatus for optical communication includes external-injection light sources, and a multiplexer/ |
| 7073956 |
Optical transceiver and passive optical network using the same |
July 11, 2006 |
| Disclosed are an optical transceiver and an passive optical network using the same. The optical transceiver includes a polarization splitter for splitting injected light input from an outside of the optical transceiver into a first polarization component and a second polarization compone |
