| Entries |
| Document | Title | Date |
|---|
| 20130028607 | Method For Optically Transmitting Data Into and From a Casing of a Projectile - A method for optically transmitting data into and from a casing of a projectile. The method including: transmitting, from an outside of the casing to an inside of the casing, a first optical signal containing first data through a first optical window disposed on the casing; manipulating the first data inside the casing of the projectile into second data; and transmitting, from the inside of the casing to the outside of the casing, a second optical signal containing the second data through a second optical window. The first and second optical windows can be the same optical window or different optical windows. | 01-31-2013 |
| 20090196622 | Reconnection method in peripheral interface using visible light communication - 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 indication signal indicating the disconnection. The secondary device aligns the communication link with the primary device using the warning indication signal, receives the R-XID message from the primary device by the secondary device, and transmits an R-XID response message for the R-XID message to the primary device. | 08-06-2009 |
| 20090232509 | ELECTROWETTING RETROREFLECTOR DEVICES, SYSTEMS, AND METHODS - Switchable retroreflector devices that are modulated via electrowetting. The devices include an electrically-conductive polar fluid and a non-polar fluid that is immiscible with the polar fluid. The polar and the non-polar fluids differ in at least one optical property. The fluids are contained in a fluid vessel, or an array of fluid vessels. The fluids are at least partially viewable. A voltage source is configured to selectively apply an electromechanical force to the polar fluid causing repositioning and/or geometrical change of the fluids such that retroreflection in created, or suppressed, by optical refraction or by optical attenuation. | 09-17-2009 |
| 20110002691 | OPTICAL PULSE COMPRESSING BASED ON CHIRPED FIBER BRAGG GRATINGS FOR PULSE AMPLIFICATION AND FIBER LASERS - Techniques and devices for using a chirped fiber Bragg grating to compress amplified laser pulses. | 01-06-2011 |
| 20110286748 | Data Center with free-space optical communications - 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. | 11-24-2011 |
| 20100034540 | VISIBLE LIGHT TRANSMITTER, VISIBLE LIGHT RECEIVER, VISIBLE LIGHT COMMUNICATION SYSTEM, AND VISIBLE LIGHT COMMUNICATION METHOD - A visible light communication system having a transmission apparatus for modulating a transmission signal to a multiple-value number and a reception apparatus for demodulating a multiple-value modulated transmission signal is provided. The transmission apparatus includes a plurality of light emitters for emitting light in different colors, a chromaticity coordinates calculator for mapping a digital value to a chromaticity coordinates value, and a light intensity controller for controlling a light intensity of each of the light emitters based on the chromaticity coordinates value corresponding to the digital value. The reception apparatus includes a plurality of light receivers having different spectral characteristics, a chromaticity coordinates calculator for calculating a chromaticity coordinates value according to a received light intensity detected by each of the light receivers, and a demodulator for demodulating the digital value from the chromaticity coordinates value. | 02-11-2010 |
| 20100098426 | Electro-Optical Power Level Controller for Free-Space Optical Communication Links - Systems and methods are described for automatically controlling the received power in an optical fiber connected to a free-space optical communications terminal. The system effectively reduces the dynamic range of the received light, enhancing the performance of the communications channel in the face of wide power swings induced by atmospheric scintillation and beam pointing jitter. | 04-22-2010 |
| 20080212970 | NON-LINE OF SIGHT OPTICAL COMMUNICATIONS - A non-line of sight (NLOS) communications system and method are provided. An ensemble of photodetectors is used to collect the light, scattered in the sky being illuminated by initial pulsed laser beam carrying information. Each detector collects scattered light from one area in free space along the initial light propagation line. The same bit of information is detected multiple times on multiple detectors during the pulse transmission along its propagation path. Signals received by multiple detectors are synchronized and processed in a digital signal processing unit. Improved system sensitivity and reliability is achieved by multiple registration of the same bit of information. Special selection of the areas in free space ensures detection of a single bit of information during the time equal to a bit period. | 09-04-2008 |
| 20090169215 | LIGHTING DEVICE - The invention relates to A method for a lighting device, in particular for a display device such as a LCD-TV, projector etc., generating radiation including at least visible light for illumination with at least one light-emitting element ( | 07-02-2009 |
| 20080279559 | High Frequency Optical Millimeter-Wave Generation and Wavelength Reuse - A method includes generating an optical millimeter wave signal for modulation of a first data signal, and deriving from the generated optical millimeter wave signal a subsequent light source for modulation of a second data signal. More specifically the generating includes modulating a light wave to a multiple of a frequency of an oscillating signal. Alternatively, the generating includes modulating a data signal mixed with an oscillating signal to a multiple of a frequency of the oscillating signal. The deriving includes modulating a frequency component filtered from a data modulation of the generated optical millimeter wave signal. | 11-13-2008 |
| 20080279558 | METHOD & APPARATUS FOR CLEARING AN OPTICAL CHANNEL - 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. | 11-13-2008 |
| 20090185808 | OPTICAL COMMUNICATION DEVICE AND METHOD OF MANUFACTURING THE SAME - An optical communication device contains a semiconductor chip that performs wireless communication and a wireless-signal-and-optical-signal conversion chip substrate that mounts the semiconductor chip. The semiconductor chip includes a first wireless communication circuit element and a first antenna element. The first wireless communication circuit element is connected to the first antenna element. The wireless-signal-and-optical-signal conversion chip substrate includes a second wireless communication circuit element, a second antenna element and an optical communication element. The second wireless communication circuit element is connected to the second antenna element. The optical communication element is connected to the second wireless communication circuit element. The wireless-signal-and-optical-signal conversion chip substrate mounts the semiconductor chip with the first antenna element of the semiconductor chip and the second antenna element of the wireless-signal-and-optical-signal conversion chip substrate being faced with each other. | 07-23-2009 |
| 20090052902 | Communication System, Communication Apparatus and Method, and Computer Program - A communication system ( | 02-26-2009 |
| 20110129228 | Methods and Apparatuses for Enabling Detection of a Modulated Optical Source - Methods and apparatuses for enabling detection of a modulated optical source involve one or more modulated optical signals shifted, i.e., demodulated optically, to one or more base band signals that are detectable by one or more low-frequency detectors. | 06-02-2011 |
| 20120195598 | COMMUNICATION SYSTEM - A communications system comprising at least one light source, a side-emitting fiber light rope into which light emitted from the light source is coupled, and means for sending at least one data carrying optical signal along the light rope. | 08-02-2012 |
| 20110110668 | VISIBLE-LIGHT WIRELESS COMMUNICATION METHOD AND SYSTEM - 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. | 05-12-2011 |
| 20090028572 | FREE-SPACE OPTICAL RECEIVING APPARATUS AND ELECTRONIC DEVICE EQUIPPED WITH THAT APPARATUS - A free-space optical receiving apparatus in one embodiment of the invention is provided with: a signal receiving light-sensitive element that converts an infrared signal to an electric current signal; a current-voltage conversion circuit that converts the electric current signal to a voltage signal; a shared processing circuit that amplifies this voltage signal, performs digital conversion on the voltage signal, and outputs a digital signal; and a mode conversion circuit that switches the shared processing circuit to a remote control mode when an infrared signal is received, and switches the shared processing circuit to an IrSimple mode when an IrSimple signal is received. The shared processing circuit converts the remote control signal to a digital signal when in the remote control mode, and converts the IrSimple signal to a digital signal when in the IrSimple mode. | 01-29-2009 |
| 20110150489 | Data center with free-space optical communications - 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. | 06-23-2011 |
| 20110150492 | Data center with free-space optical communications - 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. | 06-23-2011 |
| 20090022496 | Apparatus and method for arranging communication links in visible light communication - A method and apparatus for arranging communication links in visible light communication increases the user visibility of the system. The method includes the steps of: (a) synchronizing, by a visible light communication (VLC) exchange identification (XID) frame, (b) transmission timing of a primary device and a secondary device in an allocated time slot, and securing time so as to allow the primary device and the secondary device to perform an operation required for transmitting data; (c) transmitting an XID command frame from the primary to the secondary device and (d) transmitting an XID response frame from the secondary receiving the XID command frame to the primary; and (e) filling remaining space of the allocated time slot with a visibility field so as to increase visibility of the remaining space of the allocated time slot after receiving the XID command frame or the XID response frame. | 01-22-2009 |
| 20080247759 | DEVICES, SYSTEMS AND METHODS FOR AD HOC WIRELESS COMMUNICATION - The current options for wireless communication have changed the way people work and the way in which networks can be deployed. However, there remains unresolved problems in the setup and configuration of wireless communication links. Both known cellular and ad hoc wireless networking protocols and systems are deficient in that the ability for users to communicate without a priori knowledge of MAC addresses (represented by phone numbers, IP addresses and the like) is limited or may be compromised in a hostile environment. In contrast, provided by aspects of the present invention are devices, systems and methods for establishing ad hoc wireless communication between users that do not necessarily have MAC addresses and the like for one another. In some embodiments, a first user visually selects a second user and points a coherent light beam at an electronic device employed by the second user. Data specific to the first user is modulated on the coherent light beam, which can then be demodulated when the coherent light beam is received by the electronic device of the second user. | 10-09-2008 |
| 20110150490 | Data center with free-space optical communications - 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. | 06-23-2011 |
| 20110150491 | Data center with free-space optical communications - 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. | 06-23-2011 |
| 20100303468 | White Light Emitting Device Based on Polariton Laser - A high-efficiency white-light-emitting device that includes a polariton light emitter that emits UV or blue light to a down-converting material that converts the polariton emissions to white light. The polariton light emitter includes an active region situated within a resonant optical cavity formed on a substrate. The down-converting material can comprise a luminophoric phosphor or other material. The polariton light and down-converting material can be arranged in a single apparatus to provide a white-light-emitting device that can be used for lighting and instrumentation. The device can also be configured for high-frequency modulation to provide optical signals for communications and control systems. | 12-02-2010 |
| 20090074422 | Methods and Apparatus for Target Identification - Methods and apparatus for target identification are disclosed. An example method for target identification disclosed herein comprises establishing an optical communication link with a potential target, transmitting a first signal encoded with a first code to the potential target using the optical communication link, receiving a second signal from the potential target using the optical communication link, extracting a second code from the second signal, and identifying the potential target as a friendly asset based on the second code. | 03-19-2009 |
| 20120039613 | METHOD AND APPARATUS FOR MULTI-ZONED ILLUMINATION - The present invention is directed to a multi-zoned lighting apparatus. In one embodiment, the multi-zoned lighting apparatus includes at least one circuit board, at least one control circuit coupled to the at least one circuit board and a plurality of light emitting diode (LED) groups coupled to the at least one control circuit, wherein each LED group of the plurality of LED groups is in communication with a respective external sensor that controls a respective one of the plurality of LED groups when triggered. | 02-16-2012 |
| 20120039612 | LOCATING COMPONENTS IN A DATA CENTER - Embodiments of the invention include systems and method for determining the location of components in a data center. In one embodiment, a component locating system includes a lattice formed of interconnected hubs and rods. Each hub in the lattice computes its address relative to the address of a reference location, such as the location of an adjacent hub or of an origin hub defining the origin of a reference coordinate system. A plurality of optical transmitters is distributed along the lattice to transmit location information. Optical receivers mounted on top of the racks receive the location information and communicate the location information to rack-mounted components. The racks and rack-mounted components determine their locations from the location information and optionally transmit the location information to a central management server. | 02-16-2012 |
| 20080298809 | Digital Subscriber Line Access Multiplexer, Optical Network Unit, Optical Line Terminal And Base Station - A Digital Subscriber Line Access Multiplexer (DSLAM) includes a Digital Subscriber Line interface unit for processing Physical Layer and Data Link Layer of the Digital Subscriber Line (DSL); at least two virtual DSLAM units adapted to simulate DSLAM to process a packet from the DSL interface unit; and a backhaul interface unit adapted to receive a packet processed by the DSLAM unit, and to send a packet from an access edge node or carrier equipment to the virtual DSLAM unit for processing. The disclosure further provides an Optical Network Unit, an Optical Line Terminal and a Base Station. | 12-04-2008 |
| 20120301150 | OPTICAL-INFORMATION ACQUIRING ELEMENT, OPTICAL INFORMATION ACQUIRING ELEMENT ARRAY, AND HYBRID SOLID-STATE IMAGING DEVICE - A optical-information acquisition element encompasses a semiconductor layer ( | 11-29-2012 |
| 20100260503 | Free Space Optical Connector - A Free Space Optics (FSO) connector is provided with a method for interfacing to an electronic circuit card electrical connector via the FSO connector. The method transceives electrical signals via an electronic circuit card electrical connector. Using an FSO connector, the method converts between electrical signals and optical signals, and transceives optical signals via free space. In one aspect, the optical signals are initially received via free space along a first axis, and reflected along a second axis. Further, the optical signals may be initially transmitted along the second axis and reflected into free space along the first axis. In another aspect, the optical signals are transceived in a plurality of directions in free space. For example, optical signals may be transmitted and received in four mutually-orthogonal axes. | 10-14-2010 |
| 20100014869 | INTERACTIVE OPTICAL CARDS AND OTHER HAND-HELD DEVICES WITH INCREASED CONNECTIVITY - A system for deriving benefits from the reception and processing of composite video signals by a hand-held device, such as a smart card. Video signals are modulated with auxiliary data creating composite video signals. The composite video signals are then transmitted to and received by a hand-held device. The auxiliary data is then detected in the modulated video signal by circuitry of the hand-held device. The user receives benefits resulting from the reception of the auxiliary data. | 01-21-2010 |
| 20100172649 | Free-Space Optical Transceiver Using Multimode Fiber to Couple Single Mode Input Optical Signal - An optical circulator couples optical fibers of dissimilar modes. In one embodiment, an optical circulator couples a single mode first fiber to a multimode second fiber, which is used as an optical input to a telescope. The multimode fiber does not significantly degrade the mode structure of the light form the single mode fiber. In the reverse direction, light received by the telescope is coupled into the multimode second fiber, which the circulator couples to a multimode third fiber. | 07-08-2010 |
| 20110103801 | METHOD FOR PRODUCING TERAHERTZ ELECTROMAGNETIC CARRIER WAVES - A method for producing an electromagnetic carrier wave in the frequency range between 0.1 and 10 terahertz that is suitable for the wireless transmission of data includes generating, by an electromagnetic pump wave, at least two mixing waves with a defined frequency difference, the pump wave being configured to constitute one of the mixing waves; and producing an electromagnetic carrier wave by frequency mixing the mixing waves. | 05-05-2011 |
| 20100092180 | HIGH POWER EFFICIENCY OPTICAL-WIRELESS TRANSMITTER - Provided is a high power efficiency optical-wireless transmitter capable of solving problems of low power efficiency, signal distortion due to non-linearity of output, large number of connection terminals, and non-uniformity of optical power intensities of optical sources. The high power efficiency optical wireless transmitter includes: an amplitude-to-array coder converting an amplitude of an electric signal input from a baseband modulator into optical source control signals so as to generate an optical output power corresponding to the electric signal; optical source driver groups driving optical sources based on the optical source control signals of the amplitude-to-array coder; and MMRS (modified mixed radix system) or MMRR (modified mixed radix system with Redundancy) optical source group driven by the optical source driver groups to generate various optical power intensities. | 04-15-2010 |
| 20120121271 | Method And Apparatus Of Free-Space Optical Signal Reception Having Enhanced Performance In Scattering Environments - A free space optical receiver is provided that can mitigate the detrimental effects of scattering. In an implementation, the optical beam is imaged onto a detector array in the image plane of the receiver telescope. The detector array has a series of two or more concentric zones for detecting optical power, i.e., for converting optical input to electrical output. The electrical output from each of the detection zones is processed by a respective adaptive equalizer, which is operative for compressing the detected signal pulses to counteract the effect of delay spread and thereby to reduce inter-symbol interference. The outputs from the respective adaptive equalizers are then combined for the purpose of signal recovery. | 05-17-2012 |
| 20120128366 | APPARATUS AND METHOD FOR PERFORMING COMMUNICATION USING CHROMINANCE INFORMATION IN VISIBLE LIGHT COMMUNICATION SYSTEM - In a transmission apparatus, a reception apparatus and a method for performing communication using chrominance information, a transmission apparatus includes a symbol converter to obtain a symbol from data; a symbol modulator to generate a chrominance value based on the symbol; a luminance controller to generate a luminance value; a color space converter to generate an RGB value based on the luminance value and the coordinate value; and a light emitting unit to emit light based on the RGB value. A reception apparatus includes a visible light receiver to receive light and to generate an electrical signal having RGB color information of the light; a color space converter to generate a luminance value and a chrominance value based on the RGB color information; a symbol demodulator to obtain a symbol based on the chrominance value; and a data converter to convert the symbol to data. | 05-24-2012 |
| 20120128365 | APPARATUS AND METHOD FOR PERFORMING COMMUNICATION USING LIGHT WAVELENGTHS IN A VISIBLE LIGHT COMMUNICATION SYSTEM - A transmitting apparatus includes a controller to classify data to be transmitted and to select a corresponding wavelength, a signal modulator to encode the data into an electrical signal, and a light emitting unit to emit a visual light at the selected wavelength based on the electrical signal. A receiving apparatus includes a controller to classify data to be received, and to select a corresponding wavelength, an optical filter to receive and filter a visible light, a visible light receiver to transform the filtered visible light into an electrical signal, and a signal demodulator to demodulate the electrical signal into digital data. A transmission method includes classifying transmission data, selecting corresponding wavelength, and encoding the data into an electrical signal to transmit. A receiving method includes filtering a received light, transforming the filtered light into an electrical signal, and demodulating the transformed electrical signal into digital data. | 05-24-2012 |
| 20120230698 | Wireless network system, wireless device, and network registration medthod of the wireless device - A method of registering a wireless device located in premises in a wireless network which is constructed in the premises. The method includes receiving a light signal, which includes network identification information of the wireless network constructed in the premises from at least one illumination device installed in the premises, and registering the wireless device in the wireless network constructed in the premises, by using the network identification information of the wireless network included in the received light signal. | 09-13-2012 |
| 20120128367 | SERVER DEVICE THAT SETS SECURITY LEVELS IN ACCORDANCE WITH DISTANCES BETWEEN DEVICES, CLIENT DEVICE, COMMUNICATION SYSTEM, INTEGRATED CIRCUIT FOR SERVER CONTROL, INTEGRATED CIRCUIT FOR CLIENT CONTROL, SERVER PROGRAM, CLIENT PROGRAM, METHOD FOR CONNECTING TO A CLIENT DEVICE, METHOD FOR CONNECTING TO A SERVER DEVICE, AND COMMUNICATION SYSTEM CONNECTION METHOD - A server device includes an information management unit, an optical signal transmission unit, and a service provision unit. The information management unit stores and manages a plurality of types of connection information having different importance levels, respectively, in association with the respective importance levels, the connection information being necessary for connection to a service. The optical signal transmission unit modulates the stored plurality of types of connection information into optical signals, such that a type of connection information stored in association with a higher importance level has a smaller amount of change in light intensity, and transmits the optical signals using a first communication function. The service provision unit provides, when the client device has issued a connection request containing a predetermined type of connection information using a second communication function, a service to the client device using the connection information. | 05-24-2012 |
| 20100232799 | Transmitter for Transmitting Data in an Optical Data Network and Method for Aligning Such a Transmitter - A device that can be used in an optical data network includes a receiver and a data port. The receiver receives data transmitted wirelessly by means of modulated light from a transmitter. During operation, the receiver is aligned to the transmitter as a function of a signal strength measured by the receiver. The data port can be connected to a computer system. | 09-16-2010 |
| 20110274434 | Technique for Simultaneously Transmitting Wide and Narrow Optical Beacon Signals - A technique for simultaneously transmitting wide and narrow optical beacon signals includes generating a laser beam and splitting the laser beam into a first signal on a first path and a second signal on a second path via a wavelength-dependent beamsplitter. A wide beacon signal having a first beam divergence is generated from the first signal, and a narrow beacon signal having a second, lesser beam divergence is generated from the second signal. The wavelength of the laser beam determines an allocation of the laser energy between the wide and narrow beacon signals based on transmittance/reflectance characteristic of the beamsplitter at that wavelength. The wide and narrow beacon signals are simultaneously transmitted in a overlaid manner into free space to support acquisition and tracking in a free-space optical communication system. The beamsplitter can simultaneously transmit or reflect substantially all of a data signal at a different wavelength. | 11-10-2011 |
| 20120321321 | METHODS OF COMMUNICATION UTILIZING AN LED LAMP - Operation of an LED as a light source may be temporarily interrupted to facilitate receipt and/or transmission of optical communications, as well as control of the operation of the LED based thereon. | 12-20-2012 |
| 20120281987 | Data Detection For Visible Light Communications Using Conventional Camera Sensor - The invention relates to a detection system for determining data embedded into the light output of a light source in a form of a repeating sequence of N symbols. The detection system includes a camera and a processing unit. The camera is configured to acquire a series of images of the scene via specific open/closure patterns of the shutter. The processing unit is configured to process the acquired series of images to determine the repeating sequence of N symbols. By carefully triggering when a shutter of the camera is open to capture the different symbols of the encoded light within each frame time of a camera, a conventional camera with a relatively long frame time may be employed. Therefore, the techniques presented herein are suitable for detecting the invisible “high frequency” coded light while using less expensive cameras as those used in the prior art. | 11-08-2012 |
| 20100202780 | DIGITAL TRANSMISSION OF DATA IN WHITE LIGHT BY LEDS - A device emits bit sequences (SB | 08-12-2010 |
| 20130016978 | METHOD OF VISIBLE LIGHT COMMUNICATION USING ILLUMINANCE SENSOR AND MOBILE COMMUNICATION TERMINAL FOR THE SAMEAANM Son; Jae-SeungAACI Suwon-siAACO KRAAGP Son; Jae-Seung Suwon-si KRAANM Bae; Tae-HanAACI SeoulAACO KRAAGP Bae; Tae-Han Seoul KRAANM Won; Eun-TaeAACI SeoulAACO KRAAGP Won; Eun-Tae Seoul KR - According to one embodiment, a photo detector-combined illuminance sensor includes a circuit for a Photo Detector (PD) function to detect the illuminance of the ambient environment. The illuminance sensor operates under the control of a controller in a visible light communication terminal. When an optical signal detected by the illuminance sensor is a visible light communication signal, the controller switches to cause the illuminance sensor to operate as the photo detector for the visible light communication in a visible light communication mode. | 01-17-2013 |
