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"I hate what they've done to my child...I would never let my own children watch it. "
Vladimir Zworykin, television pioneer ; Talking about an invention in which he played a critical role.
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| Number | Title | Issue Date |
| 7310330 | Apparatus for providing broadcasting channel information in internet protocol based digital broadcasting system and method thereof In a digital broadcasting system comprising a server for retransmitting a digital broadcast on the basis of an Internet protocol (IP), a user terminal for receiving the digital broadcast on the basis of the IP, and a router for connecting the server with the user te... | 12/18/2007 |
| 7283748 | Self-healing wavelength division multiplexing-passive optical network system A self-healing WDM (Wavelength Division Multiplexing)-PON (Passive Optical Network) system is disclosed and includes a CO (Central Office), a RN (Remote Node) and a plurality of subscriber units. The system includes a trunk working fiber and a trunk protection fiber... | 10/16/2007 |
| 7281865 | Bidirectional optical transceiver A bidirectional optical transceiver includes a wavelength-selecting filter, an optical fiber, a transmitting module, and a receiving module. The wavelength-selecting filter is placed on an optical axis, passes a first optical signal therethrough, and reflects a seco... | 10/16/2007 |
| 7280758 | Optical multi-ring network for burst data communication An optical multi-ring network for burst data communication is disclosed. The multi-ring network includes a plurality of optical single-ring networks having a plurality of optical add/drop routers connected with each other through fiber links, and a core optical rout... | 10/09/2007 |
| 7280754 | Two-fiber optical ring network Disclosed is a two-fiber optical ring network having a plurality of nodes linked by first and second fiber optic links, wherein each node comprises a first splitting section for splitting optical signals from optical signals traveling through the first fiber into th... | 10/09/2007 |
| 7280719 | Wideband optical module and PON using the same A wideband optical module includes a downward wideband light source for generating downward light, an upward wideband light source for generating upward light, a first circulator including a first to a third port for outputting multiplexed downward optical signals t... | 10/09/2007 |
| 7277639 | Bi-directional optical add/drop multiplexer for WDM optical networks Disclosed is a bi-directional optical add/drop multiplexer connected to an optical fiber for transmitting optical signals multiplexed in a wavelength division multiplexing optical network and which performs adding/dropping of the optical signals. The optical add/dro... | 10/02/2007 |
| 7277632 | Method for assigning wavelengths in wavelength division multiplexing ring communication network A method for assigning a predetermined wavelength between two different nodes in a wavelength division multiplexing (WDM) ring communication network that has an N number of nodes and at least one pair of optical fibers sequentially connecting the N number of nodes i... | 10/02/2007 |
| 7277490 | Apparatus for converting PCM signal An apparatus for converting pulse code modulation (PCM) signals in a telecommunication system between two different modulation standards. In the apparatus, a channel selector generates a channel select signal for identifying at least one channel of the multiple chan... | 10/02/2007 |
| 7271949 | Multi-wavelength light source and wavelength division multiplexing system using the same A multi-wavelength light source includes an amplifier for generating light over a wide wavelength range; and, an optical fiber grating including a plurality of gratings formed on an optical fiber in in parallel with each other, thereby dividing the light inputted fr... | 09/18/2007 |
| 7266312 | Burst mode optical receiver A burst mode optical receiver is disclosed and includes a converter for converting a burst mode signal into a voltage signal, a bottom level detector for detecting a bottom level of an output signal from the converter, an automatic gain controller for automatically ... | 09/04/2007 |
| 7254738 | Method for processing error of received packet in ethernet MAC layer A method for processing a received packet in a MAC (Medium Access Control) layer of an Ethernet which receives a packet from a physical layer and transmits the received packet to a switch. The method includes the steps of detecting an error while receiving the packe... | 08/07/2007 |
| 7254340 | Apparatus and method for tracking optical wavelength in WDM passive optical network using loop-back light source 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-... | 08/07/2007 |
| 7244899 | Keypad assembly for portable terminal A keypad assembly for a portable terminal according to the present invention includes: a keypad having pad portions with a plurality of key buttons placed thereon, light guide plates disposed between the pad portions, and reflection units disposed on the light guide... | 07/17/2007 |
| 7239808 | Subscriber interfacing device in communication-broadcasting convergence FTTH A subscriber interface device and method for transmitting a communication signal and a broadcasting signal to each subscriber in a communication-broadcasting convergence FTTH system. A subscriber interface, positioned in the ONU, modulates a first predetermined numb... | 07/03/2007 |
| 7239767 | Packaging apparatus for optical interconnection on optical printed circuit board A packaging apparatus for optical interconnection on an optical PCB includes a first substrate with a via hole formed therethrough and in which an optical waveguide is formed, an optical interconnection block having a reflective plane on its lower end inserted into ... | 07/03/2007 |
| 7236505 | Fabry-perot laser generating mode-locked channel and method for fabricating the same A Fabry-Perot laser generates a mode-locked channel having the same wavelength as that of light injected into the laser. The laser includes a semiconductor substrate and a lower cladding layer formed on the substrate. An active layer is formed on the lower cladding ... | 06/26/2007 |
| 7234948 | Directional coupler integrated with connectors A connectors-integrated directional coupler is provided. The directional coupler includes a housing having a body, an input connector integrally extended from one end of the body, and an output connector integrally extended from the other end of the body. A main lin... | 06/26/2007 |
| 7231149 | Bidirectional optical add-drop multiplexer A bidirectional optical add-drop multiplexer adds and drops optical signals having specific wavelengths among the WDM optical signals transmitted bidirectionally through one of the optical transmission lines connected between neighbor nodes in a bidirectional WDM ri... | 06/12/2007 |
| 7231121 | Optical fiber having reduced residual stress discontinuity An optical fiber having reduced residual stress discontinuity is disclosed. The optical fiber includes a core which is an optical transmission medium and a clad for surrounding the core. The residual stress discontinuity at an interface between the core and the clad... | 06/12/2007 |
| 7228071 | Wavelength division multiplexing optical switching system Disclosed is a wavelength division multiplexing optical switching system, which is connected with a plurality of nodes of an optical network and supports communication between the nodes. The optical switching system includes a wavelength division demultiplexing unit... | 06/05/2007 |
| 7228021 | Bidirectional optical add/drop multiplexer and wavelength division multiplexed ring network using the same 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 sec... | 06/05/2007 |
| 7224506 | Single side band modulation device A single side band modulation device includes a first Mach Zehnder interferometer and a second Mach Zehnder interferometer. The first Mach Zehnder interferometer includes at least two output arms, and the second Mach Zehnder interferometer includes at least two outp... | 05/29/2007 |
| 7220066 | Pluggable optical transceiver module assembly A latching mechanism, which is configured to enable a pluggable optical transceiver module assembly to be plugged in or unplugged from a cage, is disclosed. The pluggable optical transceiver module assembly includes a bail clip for providing a latching portion locke... | 05/22/2007 |
| 7218863 | Optical transmission system for optimizing bias of laser diode for SCM analog optical signal An optical transmission system for optimizing the bias of a laser diode during an SCM analog optical transmission includes an optical transmitter for converting a baseband electric signal into an optical signal using a laser diode according to the set bias and outpu... | 05/15/2007 |
| 7218815 | Athermal arrayed waveguide grating An athermal arrayed-waveguide grating is disclosed and includes an input waveguide for inputting two or more optical signals from one exterior side, a grating array for separating the optical signals into different wavelengths of light, a first slab, formed with two... | 05/15/2007 |
| 7218865 | Burst-mode optical receiver of differential output structure A burst-mode optical receiver of a differential-output structure is disclosed. The burst-mode optical receiver includes a trans-impedance amplifier for converting currents indicating the burst-mode signals into voltage signals, a bottom-level detector for detecting ... | 05/15/2007 |
| 7215892 | Duobinary optical transmitter Disclosed is a duobinary optical transmitter, which includes a laser source for outputting light with a predetermined wavelength; a Mach-Zehnder interferometer-type optical intensity modulator for modulating the intensity of the light according to a three-level data... | 05/08/2007 |
| 7215884 | Optical demultiplexer having bragg diffration grating and optical communication module using the optical demultiplexer An optical demultiplexer having at least one Bragg diffraction grating for minimizing crosstalk on the sides of transmitting and receiving optical signals, as well as an optical communication module using the optical demultiplexer. The optical demultiplexer has firs... | 05/08/2007 |
| 7213979 | Latching apparatus for pluggable optical transceiver module Disclosed is a latching apparatus for a pluggable optical transceiver module, which is configured to enable the pluggable optical transceiver module to be plugged or unplugged by pulling the pluggable optical transceiver module. The latching apparatus of the pluggab... | 05/08/2007 |
| 7209508 | Multi-channel light source and multi-channel optical module using the same A multi-channel light source includes a semiconductor optical amplifier for generating light of a wide wavelength band and outputting the generated light through a first end and a second end. The source further includes a Fabry-Perot (FP) resonator for resonating th... | 04/24/2007 |
| 7208824 | Land grid array module Disclosed is a land grid array module comprising: a substrate; a plurality of active and passive components mounted on both sides of the substrate; and a molding compound for encapsulating the both sides of the substrate with the active and passive components mounte... | 04/24/2007 |
| 7206519 | Duobinary optical transmission apparatus Disclosed is a duobinary optical transmission apparatus. The duobinary optical transmission apparatusenhances nonlinear and dispersion characteristics for an intermediate-long distance transmission at a high-speed transfer rate without the use an electric LPF. The d... | 04/17/2007 |
| 7206485 | Photonic crystal fiber preform and photonic crystal fiber manufactured using the same A photonic crystal fiber (PCF) preform, from which a photonic crystal fiber is manufactured, includes a rod-shaped substrate with holes longitudinally formed therethrough in a photonic lattice structure, and material layers having at least two different indices of r... | 04/17/2007 |
| 7203240 | Method of recovering clock signal using user clock code in TDM digital video signal and transmitting/receiving apparatus used for the method A clock recovery method for a TDM digital video signal and a transmitting/receiving apparatus for the clock recovery method are disclosed. A transmitter inserts a user clock code containing a predetermined number of points into the digital video signal during TDM pr... | 04/10/2007 |
| 7202727 | Bi-directional signal level shift circuit A circuit for shifting a level between two bi-directional signals having different voltage levels. The circuit includes a first analog switch including a first switching control terminal connected to first directional signal stage, a first input terminal connected t... | 04/10/2007 |
| 7197306 | Apparatus and method of registering home-zone location in portable radio telephone An apparatus and method used in a home-zone location registering process in a portable telephone which allows a different charging rate to be applied to a subscriber based on whether the call connection is made within the home-zone area. According to the method, the... | 03/27/2007 |
| 7187700 | Method for maintaining wavelength-locking of Fabry-Perot laser regardless of change of external temperature and WDM light source using the method Disclosed is a method for maintaining wavelength-locking of a Fabry-Perot laser regardless of a change of external temperature even though a temperature controller is not used, and a wavelength division multiplexing (WDM) light source using the method, as an economi... | 03/06/2007 |
| 7186935 | Keypad assembly for a portable terminal A keypad assembly for a portable terminal is disclosed. The keypad assembly for the portable terminal includes a light guide plate which has reflection patterns locally formed on a lower surface of the light guide plate for reflecting a part of light transmitted in ... | 03/06/2007 |
| 7177508 | Optical cable having an improved compression strength characteristic An optical fiber having improved compression strength is disclosed. The optical fiber includes a central tension member positioned in the center of the optical fiber and having at least one groove, at least one metal tube seated in the groove and containing at least... | 02/13/2007 |
