Patent application number | Description | Published |
20100021108 | OPTICAL WAVEGUIDE DEVICE AND OPTICAL COMMUNICATION MODULE - An optical waveguide device and an optical communication module are provided. In the optical waveguide device which includes a core and a cladding layer formed around the core and has one end formed to be inclined so as to refract input and output signals, the core includes therein a diffraction portion for diffracting an optical signal incident through the cladding layer to propagate straight through the core. Thus, it is possible to prevent deterioration of an optical signal coupling ratio in implementing a technique of transmitting optical signals in opposite directions. | 01-28-2010 |
20100086310 | BIDIRECTIONAL OPTICAL TRANSCEIVER - A bidirectional optical transceiver is disclosed. In the bidirectional optical transceiver, by implementing, as a stacked structure, an optical bench in which an optical system and an optical-transmitting module are installed and a multi-layer substrate with good thermal, electrical and high-resistance characteristics in which an optical-receiving module and a driving circuit for driving the optical-transmitting module are installed, thermal, electrical or optical crosstalk is prevented, high-speed transmission of transmission signals is possible through high-speed modulation thereof, and miniaturization is achieved. | 04-08-2010 |
20100134592 | METHOD AND APPARATUS FOR TRANSCEIVING MULTI-VIEW VIDEO - A method and apparatus for transceiving a multi-view video to provide a two-dimensional (2D) video service as well as a three-dimensional (3D) video service or a multi-view 3D video service is provided. When a 2D video or a 3D stereo video or multi-view 3D video is transmitted in a 2D video synthesized by a video synthesizer, format supplementary information about the synthesized video is inserted to the PSI, PES or ES_Descriptor. The synthesized 2D video is decoded by a single video decoder and the decoded synthesized video is recovered to an original video by a video recovery unit with reference to the format supplementary information. | 06-03-2010 |
20100135325 | APPARATUS AND METHOD FOR INSERTING OR EXTRACTING NETWORK TIMESTAMP - Disclosed is a system of transporting multimedia based on network, and more particularly, to an apparatus for inserting, transporting and extracting a timestamp through a network protocol. A network timestamp is transported without changing a preset transport standard such as a UDP, an RTP and a MPEG-2 standard by adding a packet having a timestamp, which is used to compensate for network jitter and used for synchronization, to a packet stream transported through a UDP or an RTP. | 06-03-2010 |
20100135665 | BURST MODE OPTICAL REPEATER - A burst mode optical repeater is provided. The burst mode optical repeater receives optical signals, which are transmitted from a plurality of optical network units (ONUs) in a passive optical network (PON) to a central office using a time division multiplexing access (TDMA) method, and relays the received optical signals using an optical-electrical-optical (OEO) method. Since the burst mode optical repeater can be installed anywhere between an optical line terminal (OLT) and the ONUs, the number of subscribers and transmission range that can be supported by a corresponding network can be increased. | 06-03-2010 |
20100136783 | METHOD OF MANUFACTURING THROUGH-VIA - Disclosed is a method of manufacturing a through-via. The through-via manufacturing method includes forming a core-via hole in a wafer, forming a suction-via hole adjacent to the core-via hole in the wafer, forming a via core in the core-via hole, forming a polymer-via hole connected to the suction-via hole in the wafer, filling the polymer-via hole with polymer solution by creating a vacuum inside the polymer-via hole by drawing air out of the suction-via hole, and polishing the wafer such that the via core formed in the core-via hole is exposed. | 06-03-2010 |
20100138302 | UE AND ADVERTISEMENT SERVICE SERVER FOR BIDIRECTIONAL PERSONALIZED ADVERTISEMENT, AND BIDIRECTIONAL PERSONALIZED ADVERTISEMENT METHOD - A user equipment and an advertisement service server for a bidirectional personalized advertisement, and a bidirectional personalized advertisement method are provided. The UE receives user setting information and advertisement meta-information from the advertisement service server, stores the received user setting information and advertisement meta-information, searches for advertisement contents corresponding to the user setting information from the stored advertisement meta-information and selects the found advertisement contents when an advertisement event occurs, and displays the selected advertisement contents. Accordingly, the dependence of an online advertisement service on a particular media service can be prevented. | 06-03-2010 |
20100150188 | SEED LIGHT MODULE FOR PASSIVE OPTICAL NETWORK - A spectrum-sliced seed light module for a wavelength division multiplexing passive optical network (WDM PON) is provided. The seed light module includes an optical amplifier to amplify seed light, an optical wavelength filter to transmit broadband light, which is output in opposite direction to an output direction of the seed light, at periodic frequency intervals, and a reflective mirror to reflect light which is spectrum-sliced through the optical wavelength filter to the optical wavelength filter. | 06-17-2010 |
20100150560 | APPARATUS AND METHOD FOR TRANSMITTING OPTICAL SIGNALS WITH ENHANCED REFLECTION SENSITIVITY IN WAVELENGTH DIVISION MULTIPLEXING PASSIVE OPTICAL NETWORK (WDM-PON) - Disclosed are an optical transmission apparatus and method in a wavelength division multiplexing passive optical network (WDM-PON). The optical transmission apparatus outputs an optical signal by applying a DC bias current and an RF signal to a laser diode at a threshold current level of the laser diode, thereby broadening an optical spectrum of the laser diode. Accordingly, an optical link becomes less vulnerable to reflection induced noise, which contributes to improve stability and reliability of the optical link. | 06-17-2010 |
20100150574 | METHOD AND APPARATUS FOR CONTROLLING REFLECTIVE SEMICONDUCTOR OPTICAL AMPLIFIER (RSOA) - A method and apparatus for controlling a reflective semiconductor optical amplifier (RSOA) are provided. The RSOA control apparatus sets a threshold current at which a light source starts to oscillate to be constant regardless of a wavelength of seed light by controlling a driving temperature for driving a RSOA, and adjusts an optical characteristic which is differently output for each wavelength of seed light to be constant by controlling a driving current. | 06-17-2010 |
20100154571 | ENVIRONMENTAL TEST CHAMBER HAVING MOVABLE PANEL AND METHOD OF DRIVING THE SAME - Disclosed are an environmental test chamber having a movable panel and a method of driving the same. The environmental test chamber is used in a thermo-hygrostat, a thermostat, and a high temperature-low temperature tester. The chamber body includes a test cavity in which an object is disposed. An air-conditioning unit conditions the air inside the test cavity, thereby controlling a condition of the test cavity. A movable panel is accommodated in the chamber body to decrease or increase a volume of the test cavity. The efficiency of the chamber is enhanced, and the cost and space required for installing additional equipment is reduced. | 06-24-2010 |
20100158522 | SEED LIGHT MODULE BASED ON SINGLE LONGITUDINAL MODE OSCILLATION LIGHT SOURCE - A seed light module based on a single longitudinal mode oscillation light source is provided. The seed light module includes a multi-wavelength signal generation light source unit generating a continuous wave (CW) of different wavelengths, a multiplexer wavelength-division multiplexing the light output from the light source unit, a polarization beam splitter splitting the light of multiple wavelength components output from the multiplexer according to specific polarization components, phase modulators phase-modulating signals of a first polarization component and a second polarization component split by the polarization beam splitter onto a sine wave having a frequency and amplitude, a radio frequency (RF) signal generator generating the sine wave, a RF signal distributor distributing the generated RF signal, amplifiers amplifying the distributed RF signals, and a polarization beam combiner combining the lights phase-modulated by the respective phase modulators and providing the combined light as a seed light output. | 06-24-2010 |
20100158526 | OPTICAL TRANSCEIVER SUITABLE FOR USE IN HYBRID, PASSIVE OPTICAL NETWORK - Provided is an apparatus for connecting a wavelength division multiplexing passive optical network (WDM-PON) to a time division multiplexing passive optical network (TDM-PON). In a hybrid, passive optical network which is a combination of the WDM-PON and the TDM-PON, the apparatus is formed at a subscriber side for matching the WDM-PPN and the TDM-PON. Accordingly, a passive remote mode can be implemented as a passive node not an active node. Therefore, the entire optical network can be efficiently operated. In addition, since the apparatus located on the subscriber side uses a wavelength-tunable light source, any dependency on the wavelength of a WDM-PON optical signal is removed. | 06-24-2010 |
20110002692 | OPTICAL WAVEGUIDE AND BI-DIRECTIONAL OPTICAL TRANSCEIVER - An optical waveguide and a bi-directional transceiver are provided. A single mode optical fiber has one end coupled to one end of a hollow optical fiber and an opposite end having a slope plane, thereby separating optical signals travelling in opposite directions from each other. Manual alignment for an optical system is easily realized without the need for additional optical elements, so that the light transmission/reception performance of the optical waveguide is improved and the structure of the optical waveguide is smaller. | 01-06-2011 |
20110044696 | OPTICAL COMMUNICATION MODULE - An optical communication module which uses a single optical fiber to enable bidirectional communication or multiplexing communication is provided. The optical communication module includes a platform configured to have a through-hole therein which vertically passes through the platform; an optical receiver configured to be provided on the platform and include a light-receiving element; an optical transmitter configured to be provided on the platform and include a light-emitting element; and an optical filter configured to be provided on one surface of the platform to correspond to the through-hole, transmit light from the light-emitting element to an optical line, and transmit light input through the optical line to the light-receiving element, where one of the light-receiving element and the light-emitting element is provided on one surface of the platform on an opposite side of the optical line with the optical filter interposed therebetween, and the other is provided on the other surface of the platform to correspond to the through-hole. Accordingly, it is possible to reduce the manufacturing cost, minimize the optical or electrical crosstalk, and maximize the optical coupling efficiency. | 02-24-2011 |
20110052125 | BIDIRECTIONAL OPTICAL TRANSCEIVER MODULE - A bidirectional optical transceiver module with a temperature control function is provided. The bidirectional optical transceiver module includes a package configured to have a flat bottom surface and include two windows used for optical transmission and reception; a ferrule configured to be coupled to one side of the package and allow an optical fiber to be inserted therein; an optical receiver module configured to be coupled to another side of the package in a direction perpendicular to that of the ferrule coupled to the package; a sub-optical transmitter module configured to be built in the package and include a light-emitting element and a collimating lens used to collimate light from the light-emitting element; an optical filter configured to be built in the package, transmit light from the light-emitting element to the optical fiber and reflect light received through the optical fiber to the optical receiver module; and a temperature regulator configured to be built in the package and control the sub-optical transmitter module to a preset temperature. Accordingly, it is possible to reduce the manufacturing cost of the package, effectively discharge heat, and be more endurable to external impact or vibration. | 03-03-2011 |
20110090970 | TERMINAL AND RELAY NODE FOR VIDEO CONFERENCE SYSTEM - A terminal, a relay node, and a stream processing method for a video conference system may be provided. A transmitting terminal may receive media data, generate elementary streams from the media data, generate a transport stream by multiplexing the elementary streams, and transmit the transport stream to a relay node associated with a first receiving terminal among receiving terminals. | 04-21-2011 |
20110243138 | SYSTEM FOR CONTROLLING PATH MAXIMUM TRANSMISSION UNIT BY DETECTING REPETITIONAL IP PACKET FRAGMENTATION AND METHOD THEREOF - A fragmentation repetition detection apparatus ( | 10-06-2011 |
20120127994 | MULTICAST COMMUNICATION METHOD, APPARATUS AND SYSTEM FOR INTERMITTENTLY CONNECTED NETWORK - A multicast communication method, a multicast communication apparatus and a multicast communication system in a network environment lacking a continuous connectivity. The source node device selects a group leader device which is able to forward data to group member devices belonging to a multicast group, and forwards the data to the selected group leader device, thereby reducing traffic between node devices, improving network reliability and saving the communication cost. | 05-24-2012 |
20120163289 | NODE APPARATUS, NODE MANAGEMENT APPARATUS AND METHOD, AND COMMUNICATION SYSTEM BASED ON CONTINUOUS NETWORK CONNECTIVITY-LACKING NETWORK - A continuous connectivity-lacking network environment-based node apparatus, node management apparatus, communication system, and node management method are provided. The node management apparatus includes a communication unit configured to receive node information from the mobile node through an additional communication network, which is separate from a continuous connectivity-lacking network, and transmit contact information generated by a control unit regarding one or more neighboring nodes of the mobile node to the mobile node via the additional communication network; and the control unit configured to generate the contact information based on the node information received by the communication unit. Accordingly, it is possible for the mobile node to quickly set a communication link and search for any neighboring communicable node. | 06-28-2012 |