Transmitter And Receiver Patents (Class 398/130)
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Patent number: 8903094Abstract: The invention concerns a cryptographic key distribution system comprising a server node, a repeater network connected to the server node through a quantum channel, and a client node connected to the repeater network through a quantum channel; wherein in use: the repeater network and the client node cooperatively generate a transfer quantum key which is supplied to a system subscriber by the client node; the server node and the repeater network cooperatively generate a link quantum key; the repeater network encrypts the link quantum key based on the transfer quantum key and sends the encrypted link quantum key to the system subscriber through a public communication channel; the server node encrypts a traffic cryptographic key based on the link quantum key and a service authentication key and sends the encrypted traffic cryptographic key to the system subscriber through a public communication channel.Type: GrantFiled: August 3, 2012Date of Patent: December 2, 2014Assignee: Selex Sistemi Integrati S.p.A.Inventor: Fabio Antonio Bovino
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Patent number: 8897647Abstract: A communication link can be established by way of a radio interface between a first mobile communication facility and a second mobile or permanently stationary communication facility. In at least one embodiment, an item of identification information is made available by one of the communication facilities as an optical signal for receipt at the cited sensor; the communication facility, to which the sensor receiving the optical signal belongs, accepts the identification information and transfers the accepted identification information as a request to set up a communication link via the radio interface with the communication facility, which makes or has made the optical signal available. The requested communication facility implements a comparison between the accepted identification information and its own identification information and permits the setup of the communication link as a function of the comparison result.Type: GrantFiled: August 31, 2012Date of Patent: November 25, 2014Assignee: Siemens AktiengesellschaftInventors: Thomas Friese, Georg Von Wichert
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Publication number: 20140334826Abstract: A lighting fixture for visible light communication is configured to modulate light intensity of a light source (11) comprising a light-emitting device (2) to superpose a communication signal on illumination light. The lighting fixture includes: a power supply circuit (3) configured to control light output of the light source (11) based on a dimming signal; a switch device (Q1) for modulating an output current from the power supply circuit (3) to the light source (11); an impedance element (Rx); a communication circuit (4); and an ON circuit (6). The communication circuit (4) is configured to supply a modulation signal to a side of the switch device (Q1) to superpose the communication signal on the illumination light. The ON circuit (6) is configured to turn on the switch device (Q1) by supply power from the power supply circuit (3) when the communication circuit (4) is inactivated.Type: ApplicationFiled: November 5, 2012Publication date: November 13, 2014Applicant: Panasonic CorporationInventors: Shojirou Kido, Eiji Shiohama
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Patent number: 8886045Abstract: An LED light and communication system is in communication with a broadband over power line communications system. The LED light and communication system includes at least one optical transceiver. The optical transceiver includes a light support having a plurality of light emitting diodes and at least one photodetector attached thereto, and a processor. The processor is in communication with the light emitting diodes and the at least one photodetector. The processor is constructed and arranged to generate a communication signal.Type: GrantFiled: October 10, 2013Date of Patent: November 11, 2014Assignee: Federal Law Enforcement Development Services, Inc.Inventors: John C. Pederson, Paul R. Brown, Timothy J. Vogt, James LeClaire, James Zimmerman, Brent Mikkelsen
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Patent number: 8879917Abstract: According to one embodiment, a transmission system includes a transmitter, and a receiver. The transmitter includes one or a plurality of light sources, a modulator, a first driver, a display, and a second driver. The one or a plurality of light sources is configured to emit a visible light whose light amount corresponds to a first drive signal. The modulator is configured to, according to transmission data to be transmitted from the transmitter to the receiver, modulate a first luminance signal indicative of an amount of the light the light source is configured to emit, to generate a second luminance signal. The first driver is configured to generate the first drive signal based on the second luminance signal. A mean of the second luminance signal during one frame in the input video signal is substantially equal to a value of the first luminance signal in the frame.Type: GrantFiled: August 30, 2012Date of Patent: November 4, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Jun Deguchi, Hideaki Majima, Yuichi Nakamura, Hisao Kawasato, Nau Ozaki, Toshiyuki Yamagishi
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Patent number: 8879924Abstract: Disclosed herein are a Visual Light Communication (VLC) method and apparatus using a DMX-512 network. The VLC apparatus includes a DMX signal generation unit and a DMX signal transmission unit. The DMX signal generation unit generates VLC data packets each including a DMX header, fragmentation information, and a data fragment. The DMX signal transmission unit transmits the VLC data packets to an LED lighting apparatus coupled over a DMX-512 network in order to perform VLC.Type: GrantFiled: January 24, 2013Date of Patent: November 4, 2014Assignee: Electronics and Telecommunications Research InstituteInventors: In-Su Kim, Tae-Gyu Kang, Sang-Kyu Lim, Dae-Ho Kim, You-Jin Kim, Seong-Hee Park, Il-Soon Jang, Hyun-Seok Kim, Hyun-Jong Kim, Jin-Doo Jeong
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Publication number: 20140301739Abstract: Embodiments of the present invention pertain to optical wireless architecture, and in particular to novel optical architecture to provide wireless (mm)-wave signals and symmetrical wireline service with long-reach. Certain embodiments of the invention pertain to a novel method and apparatus to provide 12.5-Gb/s wireless signals at 60-GHz millimeter (mm)-wave and 100-Gb/s symmetrical wireline service with 80 km long-reach, for example. Moreover, novel enabling techniques are employed to overcome fiber dispersion, reduce costs, and provide super-broadband and long-reach service.Type: ApplicationFiled: October 24, 2012Publication date: October 9, 2014Inventor: Jianjun Yu
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Patent number: 8849553Abstract: A vehicle-mounted driving supporting device 2 supports driving on the basis of the presence of a nonpriority vehicle A entering a priority road 50 from a nonpriority road 40. The vehicle-mounted driving supporting device 2 includes an information provision determination device 34 which, when a host vehicle is traveling on the priority road 50, determines whether or not driving support is required on the basis of the specification regarding driving support of the nonpriority vehicle A received from the outside. Therefore, it is possible to avoid a driver from feeling bothered.Type: GrantFiled: February 27, 2009Date of Patent: September 30, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventor: Katsuhiro Matsuoka
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Patent number: 8842995Abstract: A system for delivering optical power over optical conduits includes at least one optical power source delivering multiple optical power forms to multiple outlet nodes in a variety of applications.Type: GrantFiled: May 11, 2010Date of Patent: September 23, 2014Assignee: The Invention Science Fund I, LLCInventors: Alistair K. Chan, Roderick A. Hyde, Muriel Y. Ishikawa, Jordin T. Kare, Lowell L. Wood, Jr.
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Publication number: 20140270798Abstract: A method of communicating a condition in a hazardous location. The method can include determining, using a controller of a first controller communicably coupled to a measuring device, the condition in the hazardous location, and emitting, based on the condition, a first light output from a first light source in the hazardous location. The method can also include receiving, using a second enclosure located in the hazardous location, a visible light communication (VLC) signal from the first light output, and emitting, from a second light source of the second enclosure, a second light output, where the second light output comprises the VLC signal. The method can further include receiving, using a base device, the VLC signal from the second light output, translating the VLC signal into a communication format, and sending the VLC signal in the communication format.Type: ApplicationFiled: March 15, 2013Publication date: September 18, 2014Inventor: Joseph Michael Manahan
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Publication number: 20140270799Abstract: The disclosure generally relates to a method and apparatus for decoding optical signals form a device. An exemplary method includes the steps of receiving, at a device, a plurality of optical frames, each optical frame having an encoded optical signal with an optical signal frequency; recording the plurality of optical frames to obtain a recorded optical image, the recorded optical image having a first frame per second (FPS) recording rate; processing the recorded optical image to obtain a digital signal corresponding to the encoded optical signal contained in at least one of the plurality of optical frames; and decoding the digital signal to obtain decoded information.Type: ApplicationFiled: March 13, 2014Publication date: September 18, 2014Inventors: Richard D. Roberts, Selvakumar Panneer
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Patent number: 8837949Abstract: A system, method, and optical communication device are disclosed. The system can include a plurality of optically coupled nodes forming an optical communication network. Each node may include an array of pixel elements, each pixel element having an optical detector and an active optical source. The pixel array may be disposed in a backplane of a lens that is configured to map incoming optical signals to pixel locations in the backplane according to their respective angles of incidence and to minimize a deviation at each pixel location between incoming optical signals arriving at the optical detector and emissions from the optical source. The node may include a processor and memory. The processor can register senders in the optical network at locations in the pixel array and can generate routing information by which to route communications from the registered senders to other pixel elements for transmission to their respective destinations.Type: GrantFiled: November 20, 2009Date of Patent: September 16, 2014Assignee: Cubic CorporationInventors: Paul Amadeo, Allen Ripingill, David Robinson, Irene Chen
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Publication number: 20140255040Abstract: The photonic-crystal (PC) slab absorber includes: a two-dimensional (2D)-PC slab composed of semiconducting materials; and a lattice point periodically arranged in the 2D-PC slab, the lattice point for forming resonant-state which can capture an electromagnetic waves incident from an outside by resonating an electromagnetic wave in a band edge of a photonic band structure of the 2D-PC slab in the plane of the 2D-PC slab. The 2D-PC slab is doped with impurities and can absorb the captured electromagnetic wave in the band edge resonant frequency of the 2D-PC slab.Type: ApplicationFiled: March 7, 2014Publication date: September 11, 2014Applicants: OSAKA UNIVERSITY, ROHM CO., LTD.Inventors: Masayuki FUJITA, Tadao NAGATSUMA, Ryoma KAKIMI, Dai ONISHI, Eiji MIYAI
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Publication number: 20140255039Abstract: An apparatus and/or method may be used for distributed synchronization of oscillators at non-collocated stations by means of transmitting and receiving optical signals having frequencies related to a desired oscillator frequency.Type: ApplicationFiled: March 5, 2013Publication date: September 11, 2014Applicant: PHASE SENSITIVE INNOVATIONS, INCInventors: Dennis W. Prather, Garrett Schneider, Janusz Murakowski
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Patent number: 8831427Abstract: An adaptive signal processing method to achieve an increase in capacity of data transfer systems, in which control data is returned via a backward channel. The method provides signal processing using an electrical sub-carrier sub-division according to frequency, the electrical sub-carrier with the lowest carrier frequency being permanently used as the backward channel (RC) for transferring control information relating to the current transfer quality of each sub-carrier. An electrical modulation on N parallel sub-carriers takes place in the transmitter (Tx) and then an optical intensity modulation is carried out for a serial data transfer in the optical channel (IRWC). The discrete division of the information to be transferred to the sub-carriers in a real-time operation can take place by the implementation of specific bit-loading algorithms.Type: GrantFiled: April 26, 2006Date of Patent: September 9, 2014Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.Inventors: Jelena Grubor, Volker Jungnickel, Klaus-Dieter Langer, Clemens Von Helmolt
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Patent number: 8831429Abstract: Systems and methods are provided regarding an optical communication system for both short- and long-range applications employing specialized diffusive elements. An interrogator unit can utilize a diffusive element that diffuses a portion of the laser beam for short-range applications. Other portions of the beam can have low divergence to enable long-range functionality as well. A response unit can utilize a diffusive retroreflector to help ensure sensors coupled to the interrogator unit detect a reflected beam. The interrogator unit can employ a plurality of sensors for sensing one or more response signals at a plurality of angles.Type: GrantFiled: July 19, 2011Date of Patent: September 9, 2014Assignee: Cubic CorporationInventors: Tony Maryfield, Mahyar Dadkhah, Steve Blahnik
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Patent number: 8824896Abstract: A system for open space data communication comprising a transmitting device and an optical receiver using multiple varying levels of emitted radiation output. The transmitting device includes multiple emitter groups that are capable of being switched on and off and each of which can be activated in parallel to emit fixed, varying radiation outputs. A total radiation output emitted by the transmitting device is defined by a sum of the emitted radiation outputs of the emitter groups, wherein to transmit a bit vector (b0 . . . bn) an emitter group assigned to a most significant bit (b0) emits a maximum radiation output Pmax and emitter groups assigned to the less significant bits (b1 . . . bn) of the bit vector emit radiation outputs: Px=Pmax/2x where x=1 . . . n.Type: GrantFiled: January 24, 2013Date of Patent: September 2, 2014Assignee: EADS Deutschland GmbHInventors: Thilo Faith, Christian Blumm, Josef Schalk, Nikolaus Peter Schmitt, Christoph Heller
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Publication number: 20140241732Abstract: A feature of the present invention pertains to a transmitter for transmitting data by video, the transmitter including a transmission data control unit that distributes the data to multiple colors constituting the video, and a display unit that converts the distributed data into a sequence of a predetermined color value with respect to each of the multiple colors and lighting the multiple colors in a communication area on a display in accordance with the sequence of the color value.Type: ApplicationFiled: November 20, 2012Publication date: August 28, 2014Applicant: NTT DOCOMO, INC.Inventors: Masanori Ishida, Kouki Hayashi, Kunio Yoshikawa
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Patent number: 8818202Abstract: A wavelength sensing lighting system may include a light source, a sensor and a controller. One or more light sources and sensors may be included in an array. The light source may emit an illuminating light and the sensor may sense an environmental light. The illuminating light may include data light. The lighting system may include a plurality of nodes connected in a network. The nodes may communicate by emitting and receiving the data light, which may be analyzed by the controller. The light source and the sensor may be provided by a light emitting semiconductor device that is capable of emitting illuminating light and receiving environmental light. A conversion material may convert the wavelength of a source light into a converted light. The conversion material may increase the wavelength range of light emittable and detectable by the lighting system.Type: GrantFiled: May 23, 2013Date of Patent: August 26, 2014Assignee: Environmental Light Technologies Corp.Inventors: Fredric S. Maxik, David E. Bartine, Pedro Medelius, Eric Bretschneider
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Patent number: 8811826Abstract: Lamps having light emitting diodes configured for data transmission require the high-frequency circuit of higher power. In order to simplify the required electronics, the light emitting diodes are divided into groups and the groups are modulated differently. Due to the multilevel modulation, the symbol rate can be reduced with the data rate remaining the same, thus reducing the switching rate and the circuitry complexity.Type: GrantFiled: September 2, 2008Date of Patent: August 19, 2014Assignee: Siemens AktiengesellschaftInventors: Oscar Cristobal Gaete Jamett, Sebastian Randel, Harald Rohde
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Patent number: 8805193Abstract: According to one exemplary embodiment, an apparatus, system and method for a remotely powered optical output label is disclosed. The system includes a transmitting device including at least one transmitting antenna and a power source. A receiving label is in remote communication with the transmitting device, the receiving label including a receiving antenna and a capacitor connected to at least one optical element. The optical element may be selectively controlled and powered to variably emit light using energy transmitted by the transmitting device.Type: GrantFiled: February 17, 2011Date of Patent: August 12, 2014Assignee: Avery Dennison CorporationInventors: Ian J. Forster, Craig W. Potter, Victor P. Holbert
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Patent number: 8805190Abstract: A visible-light wireless communication system includes a plurality of light transmitters for generating light signals modulated at different frequencies and at least one terminal for wirelessly communicating with the plurality of light transmitters using the light signals.Type: GrantFiled: July 2, 2009Date of Patent: August 12, 2014Assignees: Samsung Electronics Co., Ltd., The Chancellor, Masters and Scholars of the University of OxfordInventors: Kyung-woo Lee, Dae-Kwang Jung, Dominic O'Brien
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Patent number: 8798479Abstract: In a first embodiment of the present invention, a method is provided comprising: receiving a selection of a desired brightness level of a light source; receiving a piece of data to be transmitted via visible light communication using the light source; selecting a duty cycle, described by an encoding scheme, based on the desired brightness level; encoding the data using the encoding scheme, wherein the encoding includes identifying a code corresponding to both the piece of data and the selected duty cycle; and transmitting the identified code via visible light communication using the light source.Type: GrantFiled: April 6, 2010Date of Patent: August 5, 2014Assignee: Samsung Electronics Co., Ltd.Inventor: Clint F. Chaplin
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Publication number: 20140212146Abstract: An information communication method is provided that transmits a signal using a change in luminance. The information communication method includes determining a pattern of the change in luminance by modulating the signal to be transmitted, and transmitting the signal by a display, which is a light emitter, changing in luminance according to the determined pattern. The method also includes detecting, by a sensor, a person within a viewing angle of the display or a person near the viewing angle. Further, in the transmitting of the signal, the signal is transmitted by changing in luminance by a larger change amount in the case where the person near the viewing angle is detected than in the case where the person within the viewing angle is detected.Type: ApplicationFiled: March 27, 2014Publication date: July 31, 2014Applicant: PANASONIC CORPORATIONInventors: Mitsuaki OSHIMA, Hideki AOYAMA
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Publication number: 20140207517Abstract: An information communication method that enables communication between various devices includes: transmitting position information indicating a position of a terminal device; obtaining one or more sets of identification information of respective one or more devices and one or more sets of service information respectively associated with the one or more sets of identification information, and holding the one or more sets of identification information and the one or more sets of service information; setting an exposure time of an image sensor; obtaining a bright line image including a plurality of bright lines; obtaining identification information of a subject, by demodulating data specified by a pattern of the plurality of bright lines included in the obtained bright line image; and selecting service information associated with the identification information of the subject from the held one or more sets of service information, and presenting the service information to a user.Type: ApplicationFiled: November 22, 2013Publication date: July 24, 2014Applicant: PANASONIC CORPORATIONInventors: Mitsuaki OSHIMA, Koji NAKANISHI, Hideki AOYAMA, Ikuo FUCHIGAMI, Tsutomu MUKAI, Hidehiko SHIN, Yosuke MATSUSHITA, Shigehiro IIDA, Kazunori YAMADA
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Patent number: 8787752Abstract: The present disclosure describes an optically powered transducer with a photovoltaic collector. An optical fiber power delivery method and system and a free space power delivery method are also provided. A fabrication process for making an optically powered transducer is further described, together with an implantable transducer system based on optical power delivery.Type: GrantFiled: August 20, 2010Date of Patent: July 22, 2014Assignee: California Institute of TechnologyInventors: Axel Scherer, Aditya Rajagopal, Seheon Kim, Andrew P. Homyk
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Patent number: 8774637Abstract: A data center for executing a data processing application includes processing units, sub-units or servers. Each of the processing units, sub-units or servers can execute a part or all of the data processing application. The processing units, sub-units or servers are electrical disjoint with respect to data communications, but can communicate with each other over free space optical links.Type: GrantFiled: October 26, 2012Date of Patent: July 8, 2014Assignee: The Invention Science Fund I, LLCInventors: Howard Lee Davidson, James Robert Hamilton, Roderick A. Hyde, Arne Josefsberg, Edward K. Y. Jung, Jordin T. Kare, Robert W. Lord, Kenneth Lustig, William Henry Mangione-Smith, Michael Manos, Craig J. Mundie, Nathan P. Myhrvold, Richard F. Rashid, Burton J. Smith, Clarence T. Tegreene, Robert V. Welland, Charles Whitmer, Lowell L. Wood, Jr.
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Patent number: 8774638Abstract: A handheld device includes: a transmitter or receiver of a signal beam for quantum key distribution; and a source of alignment beams that diverge from each other in a pattern that matches sensors on a station containing a receiver or transmitter for the quantum key distribution. The alignment beams from the handheld device are of sufficient intensity to produce on the station visible spots that facilitate manual alignment of the handheld device. The station can measure a position and a direction of respective alignment beams and dynamically steer the signal beam according to the measurements.Type: GrantFiled: July 31, 2009Date of Patent: July 8, 2014Assignee: Hewlett-Packard Development Company, L.P.Inventors: Joanna Duligall, Timothy Spiller, Radu Ionicioiu, Raymond G. Beausoleil, David A. Fattal
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Publication number: 20140186052Abstract: An information communication method that enables communication between various devices includes: transmitting position information indicating a position of an image sensor; receiving an ID list; setting an exposure time of the image sensor; obtaining a bright line image including a bright line, by capturing a subject by the image sensor; obtaining information by demodulating data specified by a pattern of the bright line included in the obtained bright line image; and searching the ID list for identification information that includes the obtained information.Type: ApplicationFiled: November 22, 2013Publication date: July 3, 2014Applicant: PANASONIC CORPORATIONInventors: Mitsuaki OSHIMA, Koji NAKANISHI, Hideki AOYAMA, Ikuo FUCHIGAMI, Tsutomu MUKAI, Hidehiko SHIN, Yosuke MATSUSHITA, Shigehiro IIDA, Kazunori YAMADA, Toshiyuki MAEDA, Akihiro UEKI, Takashi SUZUKI, Akira SHIOKAWA, Koji AOTO
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Patent number: 8768171Abstract: The present invention relates to light-based communication, and more particularly it relates to methods for configuration of at least one remote light-sensing device, to a central light-emitting unit and to a light-sensing device. According to the invention, spatial configuration of remote light-sensing devices (e.g. peripherals such as loudspeakers or light devices), will be achieved by transmission of embedded identifiers or configuration information in light emitted in a plurality of directions from a central light-emitting unit. With a different identifier or different configuration information for each direction of transmission, the directions can be distinguished from each other. The invention enables a user to place remote light-sensing devices in a desired spatial position and the central light-emitting unit will be able to determine location and spatial function, i.e. for example whether the peripheral is an audio device and/or a lighting device.Type: GrantFiled: January 16, 2009Date of Patent: July 1, 2014Assignee: Koninklijke Philips N.V.Inventors: Tim Corneel Wilhelmus Schenk, Lorenzo Feri, Bartel Marinus Van De Sluis, Cornelis Reinder Ronda
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Patent number: 8755692Abstract: A method for wireless data transmission between a transmitter and a receiver includes modulating signals onto an electromagnetic carrier wave in a frequency range between 0.1 and 10 terahertz, and transmitting the carrier wave by the transmitter and focusing the transmitted carrier wave in the direction of the receiver. The transmitter is aimed towards the receiver by an adjusting system using a wireless communication link between the transmitter and the receiver so as to provide automatic aiming.Type: GrantFiled: April 8, 2009Date of Patent: June 17, 2014Assignee: Deutsche Telekom AGInventors: Ralph Michaels, Hans Joachim Einsiedler, Thomas Moersdorf, Gerhard Kadel, Josef Kraus, Klaus Milczewsky, Michael Kern, Karsten Buse, Ingo Breunig, Rosita Sowade, Jens Kiessling, Bastian Knabe
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Patent number: 8744273Abstract: In a device and method for the optical transmission of data using a pulse-width-modulated LED (2), a startup phase ascertainment unit (3) for ascertaining at least one startup phase of the LED (2) as a function of a sequence of detected switching states of the LED (2) and a modulation unit (4) for modulating the data to a light signal emitted by the LED (2) during the ascertained startup phase of the LED (2) are provided, and data packets are first deleted from the data packet queue or queues after they have been successfully transmitted.Type: GrantFiled: February 25, 2009Date of Patent: June 3, 2014Assignee: Siemens AktiengesellschaftInventors: Johannes Riedl, Joachim Walewski
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Patent number: 8744267Abstract: An LED light and communication system includes one or more optical transceivers that have a light support having a plurality of light emitting diodes and one or more photodetectors attached thereto, and a processor in communication with the light emitting diodes and the one or more photodetectors. The processor is constructed and arranged to generate a communication signal. The one or more optical transceivers are engaged to a lighting fixture within a building. The one or more optical transceivers are constructed and arranged to communicate with a name tag.Type: GrantFiled: March 22, 2012Date of Patent: June 3, 2014Assignee: Federal Law Enforcement Development Services, Inc.Inventor: John C. Pederson
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Patent number: 8731406Abstract: For use in a visible light communication (VLC) network, a method for generating high resolution visibility frames for visibility or dimming support. The method includes determining a required visibility for the high resolution frames. The method also includes generating a pattern that meets the determined required visibility, the pattern having a first quantity of first low resolution frames and a second quantity of second low resolution frames. The method further includes transmitting the pattern to achieve the required high resolution frames.Type: GrantFiled: April 26, 2010Date of Patent: May 20, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Sridhar Rajagopal, Farooq Khan
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Patent number: 8712250Abstract: A data center for executing a data processing application includes processing units, sub-units or servers. Each of the processing units, sub-units or servers can execute a part or all of the data processing application. The processing units, sub-units or servers are electrical disjoint with respect to data communications, but can communicate with each other over free space optical links.Type: GrantFiled: September 24, 2010Date of Patent: April 29, 2014Assignee: The Invention Science Fund I, LLCInventors: Howard Lee Davidson, James R. Hamilton, Roderick A. Hyde, Arne Josefsberg, Edward K. Y. Jung, Jordin T. Kare, Robert W. Lord, Kenneth Lustig, William Henry Mangione-Smith, Michael Manos, Craig J. Mundie, Nathan P. Myhrvold, Richard F. Rashid, Burton Smith, Clarence T. Tegreene, Robert V. Welland, Charles Whitmer, Lowell L. Wood, Jr.
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Patent number: 8699887Abstract: A lighting system includes light fixtures not in communications with and not synchronized with one another, and one or more light sensors. Each light fixture separately emits data encoded visible light including light fixture information encoded therein in a manner that avoids visually perceptible flicker and enables light fixture information emitted by one light fixture to be distinguished from light fixture information emitted by other light fixtures. The light fixture information is encoded into data encoded visible light such that a difference between different levels of the data encoded visible light is indicative of an illumination capability of the light fixture and such that visually perceptible flicker is avoided. Each light sensor separately receives portions of data encoded light visible light emitted by multiple light fixtures and separately determines the identity of and the maximum and present illumination contributions for each light fixture.Type: GrantFiled: March 14, 2013Date of Patent: April 15, 2014Inventor: Bret Rothenberg
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Publication number: 20140099107Abstract: An exemplary system for communicating data includes a light source that emits light and a processing device that receives and encodes data into a communication signal. A modulator modulates light emitted by the light source, wherein the modulation is imperceptible to the human eye, and the modulated light includes the encoded data. The modulation of the transmitted light is imperceptible to a human eye. A receiving device receives the modulated light and processes the light to decode the encoded signal and obtain the data.Type: ApplicationFiled: October 9, 2013Publication date: April 10, 2014Applicant: Booz, Allen & HamiltonInventors: Vadim RAVICH, Andrew Linn, Allan O. Steinhardt
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Patent number: 8693877Abstract: Apparatuses and methods to detect and emit various infrared (IR) and ambient light signals using an integrated sensor and emitter device. Embodiments include a sensor to sense proximity, to sense IR data signals, and to sense ambient light; and an emitter of an IR proximity signal. The sensor detects the IR proximity signal from the emitter when the apparatus is sensing proximity, detects IR data signals when the apparatus is detecting IR data, and detects ambient light when the apparatus sensing light. The IR data signals may include IR remote control (IR RC) and/or IR data association (IRDA) signals. The signals may be detected simultaneously and may be in different frequency bands. According to embodiments, such an emitter may also emit an IR data signals, such as IR RC and/or IRDA signals. These signals may be emitted simultaneously and may be in different frequency bands.Type: GrantFiled: October 12, 2007Date of Patent: April 8, 2014Assignee: Apple Inc.Inventors: John Tam, David Tupman, Steve Hotelling
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Patent number: 8693878Abstract: The invention relates to an illumination device connectable to an AC voltage source for applying an alternating voltage during a series of time intervals. The illumination device comprises at least a first light source and a second light source, arranged to be connected in series to the AC voltage source, to generate a luminance output in response to the alternating voltage. Selection means are provided configured for selectively applying the alternating voltage over the first light source or the first and second light source. A controller is provided for controlling the selection means in response to a data signal comprising data symbols such that one or more of the data symbols are contained in said luminance output. The invention also relates to a method of embedding one or more data symbols in the luminance output of such an illumination device, an optical receiver and an illumination system.Type: GrantFiled: November 27, 2009Date of Patent: April 8, 2014Assignee: Koninklijke Philips N.V.Inventors: Tim C. W. Schenk, Lorenzo Feri, Peter Deixler
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Patent number: 8687965Abstract: A Universal Serial Bus (USB) dongle may include an optical transceiver having a USB inter face for engagement to an electronic device such as a laptop computer or other USB-configured device. The USB dongle may include a converter or buffering, isolation, modulation or amplification circuitry. The USB dongle sends and receives data signals which may be carried upon an optical transmission as generated by an LED light source which in turn is in communication with a host device such as a network processor. The USB dongle may also include operational amplifiers (op-amps) and transistor amplifiers.Type: GrantFiled: May 23, 2008Date of Patent: April 1, 2014Assignee: Federal Law Enforcement Development Services, Inc.Inventors: John Pederson, Paul R. Brown, Timothy J. Vogt
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Publication number: 20140086592Abstract: There is provided a power supply receiver-transmitter device, a wireless power supply receiver, and a wireless power supply transmitter which allow wireless power supply transmission and wireless data transmission and reception, and improve the usability thereof. The wireless power supply receiver-transmitter device includes: a wireless power supply receiver (PR) including a power receiver unit (RU) and a first data transmitter/receiver unit (DRU); a wireless power supply transmitter (PT) including a power transmitter unit (TU); and a second data transmitter/receiver unit (DTU). The wireless power supply receiver (PR) wirelessly receives electric power transmitted from the wireless power supply transmitter (PT), and the first data transmitter/receiver unit (DRU) bidirectionally transmits and receives data to/from the second data transmitter/receiver units (DTU) through optical communications.Type: ApplicationFiled: September 26, 2013Publication date: March 27, 2014Applicant: ROHM CO., LTD.Inventors: Ken NAKAHARA, Masayuki KITAGAWA
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Publication number: 20140064739Abstract: A light communication system, a transmitter and a receiver are provided. The light communication system includes the transmitter and the receiver. The transmitter has a first processing unit and a light-emitting element. The first processing unit produces a transmission signal. The light-emitting element produces light to carry the transmission signal. The receiver has a first variable lens, a photosensitive element and a second processing unit. The first variable lens changes the propagation path of the light. The photosensitive element senses the light passed through the first variable lens to produce a receiving signal. The second processing unit controls the first variable lens based on the signal quality of the receiving signal to change the equivalent channel between the transmission signal and the receiving signal. Therefore, the transmission capability of the light communication system is enhanced.Type: ApplicationFiled: December 12, 2012Publication date: March 6, 2014Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventor: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
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Publication number: 20140064740Abstract: Provided herein is a communication system and method capable of performing visible light communication and optic networking, the system performing visible light communication with an electronic device inside a vehicle and accessing an optic network inside the vehicle. Accordingly, RF interference and distortion is removed, and thus not effecting use of a wireless device inside the vehicle, thereby reducing malfunction/error of a electronic control device and enabling real time data transceiving in the vehicle.Type: ApplicationFiled: August 30, 2013Publication date: March 6, 2014Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTEInventors: Sang Yub Lee, Sang Hyun Park, Hyo Sub Choi, Chul Dong Lee
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Patent number: 8666257Abstract: An optoelectronic device can implement an intelligent transmitter module (“ITM”), rather than a conventional TOSA, for the transmission of optical data signals. The ITM can include an optical transmitter, a CDR and driver IC, and a microcontroller and/or linear amplifier. Space available in the optoelectronic device due to using an ITM rather than a TOSA and PCB-bound CDR, driver, microcontroller, and/or linear amplifier can be used for the inclusion of one or more electronic and/or optical components. Electronic components that can be included in a device with an ITM include: an FPGA, a DSP, a memory chip, a digital diagnostic IC, a video IC, a wireless interface, and an RF interface. Optical components that can be included in a device with an ITM include: a VOA, an SOA, a MUX, a DEMUX, a polarization controller, and an optical power monitoring device.Type: GrantFiled: May 30, 2008Date of Patent: March 4, 2014Assignee: Finisar CorporationInventors: Henry Meyer Daghighian, Kevin J. McCallion
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Patent number: 8666254Abstract: Systems, methods, and a vehicle are disclosed to enable wireless optical communications. A wireless optical transceiver includes transmitter light source configured to transmit a first optical signal at a first wavelength via a first ball lens to generate a distributed first optical signal. The distributed first optical signal is configured to be received by a remote receiver via a first line-of-sight transmission. A detector is configured to receive a focused second optical signal at a second wavelength via a second ball lens. A controller is operably coupled to the light source and to the detector. The controller is configured to receive outgoing data and to generate a first electrical signal configured to modulate the first optical signal to transmit the outgoing data. The controller also is configured to receive a second electrical signal from the detector and to demodulate the second electrical signal to generate incoming data.Type: GrantFiled: April 26, 2011Date of Patent: March 4, 2014Assignee: The Boeing CompanyInventors: Eric Yuen-Jun Chan, Dennis G. Koshinz
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Publication number: 20140050488Abstract: Exemplary embodiments of a communication system for a power electronic converter with a plurality of converter modules includes controllable power semiconductor switches and individually mountable onto a converter cabinet or frame. The communication system includes unguided transmission of optical signals between optical elements arranged on a converter module and on the converter cabinet, respectively. The communication system provides a free-space optical signal transmission between two distinct parts of the converter that combines the flexibility offered by radio transmission and the data rate and reliability of optical communication, while at the same time avoiding the complex and expensive cabling of optical fiber solutions.Type: ApplicationFiled: October 18, 2013Publication date: February 20, 2014Applicant: ABB RESEARCH LTDInventors: Dacfey Dzung, Didier Cottet, Anne Vallestad, Lars Kalland
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Patent number: 8655178Abstract: A method and apparatus for clearing an optical channel for transmitting data through free space between a first and second location includes a light beam, wherein the light beam has a spatially and/or time-dependent modulated intensity profile, and is substantially collimated so that the intensity profile is conserved over a specified distance of operation. The light beam includes a cross-sectional profile having regions of low and high intensity, portions of which are provided for the transmission of an optical data signal. A light source wavelength and intensity are selected for types of obscurant particles having optical properties whereby the radiation pressure acts on the particles, and the particles may then be either attracted into or repelled from portions of the spatially modulated optical beam, leaving certain portions of the optical channel beam absent of obscurant particles, thereby enabling transmission of optical data through the cleared optical channel with low attenuation.Type: GrantFiled: February 7, 2012Date of Patent: February 18, 2014Assignee: The Boeing CompanyInventors: Barbara A. Capron, William A. McNeely, Kishan Dholakia, Antonia Erika Carruthers
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Patent number: 8655180Abstract: The invention relates to base stations in communication networks. In more particular the invention relates to cellular base stations such as 3G/4G and WLAN base stations. Some or all of the aforementioned advantages of the invention are accrued with a fully photonic base station (200) that powers itself with solar photons, provides radio network access and relays an optical photonic beam (220, 221, 230, 231) through air encoded with the data from radio signals of computer users and mobile phone users to the Internet and the global telecommunication network. A system engineer can build a network with the inventive base stations in a matter of days. He simply walks to the roof of houses and points the optical beams to other base stations in adjacent houses.Type: GrantFiled: April 27, 2012Date of Patent: February 18, 2014Inventor: Mikko Vaananen
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Publication number: 20140044435Abstract: A control device includes: an acquisition portion that acquires, from an information processing apparatus, pairing information corresponding to at least one of electronic devices among from a plurality of pieces of pairing information corresponding to the respective electronic devices, the pairing information being used in order that the electronic devices connected to each other via a wireless network perform pairing; and an output portion that outputs the pairing information corresponding to the at least one of the electronic devices to the at least one of the electronic devices by using a non-contact system different from the wireless network.Type: ApplicationFiled: July 10, 2013Publication date: February 13, 2014Applicant: FUJITSU COMPONENT LIMITEDInventor: Mitsuru KOBAYASHI
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Patent number: 8639121Abstract: A switched wireless system is used to increase the range of peer-to-peer communications. The optically-switched fiber optic communication system includes a head-end unit (HEU) having a switch bank. Cables couple the HEU to one or more remote access points in different coverage areas. The switch bank in the HEU provides a link between the remote access points in the different coverage areas such that devices in the different cellular coverage areas communicate with each other. By using the switched communication system, the range and coverage of communication between devices may be extended such that devices in different coverage areas and devices using different communication protocols can communicate.Type: GrantFiled: August 27, 2012Date of Patent: January 28, 2014Assignee: Corning Cable Systems LLCInventors: Jacob George, Michael Sauer, Dean M. Thelen