US20090297166A1 - Illuminative light communication device - Google Patents
Illuminative light communication device Download PDFInfo
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- US20090297166A1 US20090297166A1 US12/461,227 US46122709A US2009297166A1 US 20090297166 A1 US20090297166 A1 US 20090297166A1 US 46122709 A US46122709 A US 46122709A US 2009297166 A1 US2009297166 A1 US 2009297166A1
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Classifications
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- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/116—Visible light communication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
- F21S8/08—Lighting devices intended for fixed installation with a standard
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B27/00—Alarm systems in which the alarm condition is signalled from a central station to a plurality of substations
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
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- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/175—Controlling the light source by remote control
- H05B47/185—Controlling the light source by remote control via power line carrier transmission
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/175—Controlling the light source by remote control
- H05B47/19—Controlling the light source by remote control via wireless transmission
- H05B47/195—Controlling the light source by remote control via wireless transmission the transmission using visible or infrared light
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- H05B47/1965—
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/20—Light sources comprising attachment means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
- F21K9/65—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction specially adapted for changing the characteristics or the distribution of the light, e.g. by adjustment of parts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V33/00—Structural combinations of lighting devices with other articles, not otherwise provided for
- F21V33/0004—Personal or domestic articles
- F21V33/0052—Audio or video equipment, e.g. televisions, telephones, cameras or computers; Remote control devices therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
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- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
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- H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/48245—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic
- H01L2224/48247—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic connecting the wire to a bond pad of the item
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- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
- H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
- H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
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- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5429—Applications for powerline communications
- H04B2203/5458—Monitor sensor; Alarm systems
Definitions
- the present invention relates to a technology that contributes to illuminative light communication.
- radio wave communication system has become available along with portable terminals. Recently, shorter wavelength infrared rays have been widely used due to available frequency depletion. Other than available frequency depletion, radio waves may influence medical devices or various precision equipment. Moreover, there is fear that infrared rays may adversely influence the human body (e.g., eyes). As a result, optical communication is in the spotlight as a safe communication method.
- white LEDs are developed owing to the success of development of blue LEDs.
- the features of white LEDs are: extremely lower power consumption than that of conventional incandescent lamps or fluorescent lamps, small size, and long life. Accordingly, use of white LEDs as a illuminative light source is considered.
- Another feature of white LEDs is a fast response speed relative to supplied power. Paying attention to these features, a study of electrically controlling blinking or light intensity and thereby transferring a signal has been conducted.
- the present invention aims to provide an illuminative light communication device that establishes a downlink using illuminative light, and also allows uplink optical (including infrared rays) communication, or provides, bidirectional optical communication.
- an illuminative light communication device which is positioned on the transmission side for a downlink and positioned on the reception side for an uplink, includes a lighting unit that emits light for lighting a modulator that controls blinking or light intensity of the lighting unit in accordance with data, thereby modulating the emitted light, and a light receiving unit that receives modulated light transmitted from the outside. Data is transmitted via the light emitted by the lighting unit, and the data is received by the light receiving unit.
- This structure allows establishment of a downlink using illuminative light and an optical uplink by the light receiving unit, thereby allowing bidirectional optical communication.
- the lighting unit can be made up of one or multiple LEDs, allowing establishment of a downlink using illuminative light based on the characteristics of the LEDs.
- the light receiving unit can receive infrared light or visible light as the modulated light.
- the light receiving unit may be a two-dimensional sensor. This allows effective removal of noise such as scattered light using received modulated light signals and the other signals.
- modulated light can be separated and received from multiple positions using an optical system such as a lens, and uplink data can be received from multiple light emitting sources.
- An illuminative light communication device which is positioned on the transmission side for a downlink and positioned on the reception side for an uplink, includes a light receiving unit that receives illuminative light modulated in accordance with data, thereby capturing the data, and a light emitting unit that emits light modulated in accordance with data to be transmitted.
- the light receiving unit receives downlink illuminative light while the light emitting unit establishes an optical uplink. This allows bidirectional optical communication.
- a mobile terminal for example, can carry out bidirectional communication.
- Light emitted by the light emitting unit may be infrared light or visible light.
- the light emitting unit includes a tracking unit that guides the emitted light to an external light receiving unit, thereby allowing further reliable uplink communication.
- An illuminative light communication device which is positioned on the transmission side for a downlink and positioned on the reception side for an uplink, includes a light receiving unit that receives illuminative light modulated in accordance with data, thereby capturing the data, and a reflecting and modulating unit that reflects the illuminative light and transmits reflected light modulated in accordance with data to be transmitted.
- this structure can provide bidirectional optical communication, where a downlink can be established using illuminative light while an uplink can be established using illuminative reflected light.
- illuminative light has very large electric power, and when it is used for an uplink, further reliable communication is possible.
- a new light emitting unit is unnecessary, power consumption can be suppressed to a degree of electric power provided for modulation, which considerably contributes to power saving.
- the reflecting and modulating unit may include one or multiple corner cube reflectors (hereafter, referred to as CCR).
- CCR corner cube reflectors
- the CCR is characterized in that incident light is reflected in the same incident direction, and transmits reflected light to a light source of the illuminative light used for a downlink.
- the reflected light is used for establishing an uplink.
- a tracking unit for guiding light used for an uplink to a light receiving unit is unnecessary.
- incident light from multiple light sources can be reflected in the same direction, respectively, when downlink data is received using illuminative light from multiple light sources, reflected light for an uplink can be transmitted to the respective light sources, thereby allowing reduction in communication error, and improvement in communication quality.
- an optical shutter can be used to carry out modulation through controlling reflected light to pass through or be shut off.
- modulation can be carried out through deforming a reflecting surface of the CCR to change the reflection characteristics of the CCR.
- the reflecting and modulating unit may be made up of a corner cube modulation array is made up of multiple CCRs, a lens that is deployed to form an image on the corner cube modulation array, and a modulator that controls every one or every group of the CCRs in the corner cube modulation array to modulate reflected light.
- the CCR is characterized in that incident light is reflected in the same incident direction, the CCR on which an image is formed by a light source of illuminative light transmits reflected light to that light source. If there is multiple light sources, the CCRs on which images are formed by the respective light sources transmit reflected light to the corresponding light sources. Therefore, parallel transmission is possible through modulating reflected light for every one or every group of the CCRs corresponding to the respective light sources.
- FIG. 1 is a schematic block diagram of a first embodiment according to the present invention
- FIG. 2 is a diagram describing a modified example of a light receiving unit 213 in a lighting side communication device 201 ;
- FIG. 3 is a diagram describing a modified example of a light emitting unit 222 in a terminal side communication device 202 ;
- FIG. 4 is a schematic block diagram of a second embodiment according to the present invention.
- FIG. 5 is a diagram describing an exemplary structure using a mirror as a reflector/modulator 224 ;
- FIG. 6 is a diagram describing a general view of a corner cube reflector (CCR);
- FIGS. 7A-7C each is a diagram describing an exemplary modulation method using the CCR;
- FIG. 7A is a diagram of a structure using an optical shutter;
- FIG. 7B is a diagram of a structure using a dielectric;
- FIG. 7C is a diagram of a structure using an actuator;
- FIG. 9 is a diagram describing an exemplary usage of an illuminative communication device in which a CCR is provided as the reflector/modulator 224 ;
- FIG. 10 is a diagram describing an exemplary method of combining received signals when multiple lighting side communication devices are provided in the exemplary usage of an illuminative light communication device in which a CCR is provided as the reflector/modulator 224 ;
- FIG. 11 is a diagram describing an exemplary structure of the reflector/modulator 224 in the terminal side communication device 2 capable of carrying out parallel transmission.
- FIG. 1 is a schematic block diagram of a first embodiment according to the present invention.
- 201 denotes a lighting side communication device
- 202 denotes a terminal side communication device
- 211 denotes a modulator
- 212 denotes illuminative light sources
- 213 denotes a light receiving unit
- 214 denotes a filter
- 221 denotes a light receiving unit
- 222 denotes a light emitting unit
- 223 denotes a processor.
- the lighting side communication device 201 is used as a lighting element to illuminate the vicinity thereof, and includes the illuminative light sources 212 , which emit light for lighting.
- a light source is LEDs, but is not limited to them.
- LDs or other light emitting devices with a fast response speed are available.
- illuminative light sources 212 for lighting may be LEDs, which are controlled to change light intensity or blinking. Note that since LEDs have a high-speed response characteristic as described above, change in light intensity and/or blinking is imperceptible to the human eye, and seems as if light is emitted continuously. Accordingly, the illuminative light sources 212 may be used for lighting besides data communication.
- the light receiving unit 213 which is provided for receiving modulated light (such as infrared rays, visible light, ultraviolet light) emitted from the terminal side communication device 202 , includes a light receiving device such as a photodiode.
- a filter 214 is provided for selectively receiving modulated light emitted from the terminal side communication device 202 .
- the filter 214 that allows infrared rays to pass through should be provided. Needless to say, a structure without the filter 214 is possible. In this case, received light is converted into an electric signal, which is then demodulated. Consequently, data from the terminal side communication device 202 is reconstructed and then output.
- the terminal side communication device 202 may be an arbitrary terminal device, and may include the light receiving unit 221 and the light emitting unit 222 for illuminative light communication and the processor 223 for various kinds of processing.
- the light receiving unit 221 receives and demodulates modulated light emitted from the lighting side communication device 201 , and transmits the demodulated results to the processor 223 . In this manner, reception of data transmitted from the lighting side communication device 201 via illuminative light is possible, or establishment of a downlink is possible.
- the light emitting unit 222 which includes a light source such as LEDs or LDs, and a control circuit for turning on and off the light sources, receives data to be transmitted from the processor 223 , controls light intensity or blinking of the light sources in accordance with data, and emits the resulting modulated light.
- any modulation system can be used for that modulation.
- infrared rays, visible light, or ultraviolet light may be used as light to be emitted.
- the light receiving unit 213 of the lighting side communication device 201 described above then receives the modulated light, or an uplink is established.
- the lighting side communication device 201 has the illuminative light sources 212 illuminate the vicinity thereof, and modulates the illuminative light in accordance with data, allowing transmitting the data via the illuminative light.
- the light receiving unit 221 in the terminal side communication device 202 then receives this illuminative light, thereby receiving data transmitted from the lighting side communication device 201 .
- a downlink is established.
- the terminal side communication device 202 has the light emitting unit 222 emit modulated light in accordance with data, thereby transmitting data.
- the light receiving unit 213 of the lighting side communication device 201 then receives this modulated light, and thus the lighting side communication device 201 receives data transmitted from the terminal side communication device 202 .
- an uplink is established. In this manner, either downlink or uplink optical communication is possible, or bidirectional optical communication is possible.
- the terminal side communication device 202 may be a mobile, portable terminal device, such as a notebook computer, a PDA, or a cellular phone, which does not need cable connection. More specifically, in the case of a PDA with a camera or a cellular phone with a camera, the camera may be used as the light receiving unit 221 .
- the terminal side communication device 202 is available in an environment where radio wave communication is restricted, such as a hospital, a train, an airplane, a spaceship, or a site where pacemaker users exist, and no license for use thereof is required. Needless to say, it is available in various environments, such as ordinary offices, stores, homes, and public facilities. In addition, not limited to indoors, it is available for various applications, such as neon signs, lighting for advertisement, and communication among automobiles or among facilities on the street and automobiles in a transportation system.
- optical wavelength is short, allowing very higher-speed communication than radio wave communication.
- lighting elements are widely provided, and lighting is naturally provided in an environment where terminal devices are used. Such lighting elements may be used as the lighting side communication device 201 for communication, resulting in considerable reduction in installation cost.
- respective lighting elements may be used as the lighting side communication device 201 , and multiple lighting side communication devices 201 can be deployed.
- light emitted from a single terminal side communication device 202 can be received by the multiple lighting side communication devices 201 .
- light is received by the multiple lighting side communication devices 201 , allowing improvement in communication quality.
- other lighting side communication devices 201 can receive that light, solving such problem of shadowing.
- FIG. 2 is a diagram describing a modified example of the light receiving unit 213 in the lighting side communication device 201 .
- 231 denotes a two-dimensional sensor
- 232 denotes a lens.
- the two-dimensional sensor 231 is used as the light receiving unit 213 in the lighting side communication device 201
- the lens 232 is used to form an image on the light receiving surface.
- an image due to light emitted from the terminal side communication device 202 is formed on the light receiving surface of the two-dimensional sensor 231 , and that light is received by some of a great number of light receiving cells provided in the two-dimensional sensor 231 .
- the other light receiving cells receive environmental light, background noise can be removed using it, allowing high-quality communication.
- an image due to lights emitted from the respective terminal side communication devices 202 and 202 ′ are formed at different positions of the two-dimensional sensor 231 , as shown in FIG. 2 .
- This allows parallel reception of data from the respective terminal side communication device 202 and 202 ′.
- a case of three or more terminal side communication devices provided provides the same advantage.
- light emitted form the respective terminal side communication devices 202 and 202 ′ can be received by the two-dimensional sensors 231 , which are provided in the respective lighting side communication devices 201 .
- communication quality can be improved by identifying light received points in the respective two-dimensional sensors 231 from the light received positions in the respective two-dimensional sensors 231 and the position of the lighting side communication device 201 .
- FIG. 3 is a diagram describing a modified example of the light emitting unit 222 in the terminal side communication device 202 .
- 241 denotes a tracking unit
- 242 denotes LED light sources
- 243 denotes a mirror surface
- 244 denotes a lens.
- FIG. 1 when the LED light sources 242 are used as the light source of the light emitting unit 222 in the terminal side communication device 202 emitted light diverges, resulting in decrease in intensity of light received by the lighting side communication device 201 .
- FIG. 3 shows an exemplary structure having the mirror surface 243 and the lens 244 provided to prevent such divergence of emitted light and narrow a light beam.
- Light emitted from the LED light sources 242 may be effectively provided to the lighting side communication device 201 using such an optical system, allowing preferable communication. Needless to say, when LDs with high directivity are used as the light source, the mirror surface 243 and the lens 244 are unnecessary.
- the tracking unit 241 is provided to guide the light beam to the light receiving unit 213 in the lighting side communication device 201 .
- the tracking unit 241 may be structured with a movable mechanism that allows manual change in light beam direction. Alternatively, it may be structured to automatically operate according to illuminative light or operate under control of a terminal device itself. Alternatively, it may be structured to be controlled by the lighting side communication device 201 via a downlink. In this manner, there are a variety of structures to embody the tracking unit 241 .
- a modified example of the light receiving unit 213 in the lighting side communication device 201 and a modified example of the light emitting unit 222 in the terminal side communication device 202 have been described above.
- the present invention is not limited to those examples.
- the structure shown in FIG. 2 may be applicable to the light receiving unit 221 in the terminal side communication device 202 . This allows parallel illuminative light transmission of different pieces of data from multiple lighting side communication devices and selective reception of those pieces of data by the terminal side communication device 202 .
- data to be transmitted from the lighting side communication device 201 and data received therefrom may be transferred via a dedicated data line or may be superimposed on an electric power waveform and transmitted via a power line, which supplies electric power for lighting.
- a dedicated data line or may be superimposed on an electric power waveform and transmitted via a power line, which supplies electric power for lighting.
- FIG. 4 is a schematic block diagram of a second embodiment according to of the present invention.
- 224 denotes a reflector/modulator.
- the second embodiment shows a structure such that illuminative light for a downlink is used as is, and reflected light is used for an uplink. As described above, illuminative light has large electric power, and when it is used for an uplink, further reliable communication is possible.
- the light emitting unit 222 is unnecessary in the terminal side communication device 202 , power consumption of the terminal side communication device 202 can be considerably suppressed, greatly contributing to power saving.
- the structure of the lighting side communication device 201 can be the same as those of the aforementioned first embodiment and the modified example thereof, repetitive descriptions thereof are thus omitted, and the modulator 211 is not shown in the drawing.
- the light receiving unit 221 in the terminal side communication device 202 may be the same as those of the aforementioned first embodiment and the modified example thereof.
- the reflector/modulator 224 is provided in the terminal side communication device 202 , which allows use of illuminative light for an uplink.
- the reflector/modulator 224 reflects illuminative light and transmits the resulting reflected light, which is modulated in conformity with to-be-transmitted data via an uplink.
- FIG. 5 is a diagram describing an exemplary structure with a mirror used as the reflector/modulator 224 .
- 251 denotes a mirror
- 252 denotes an optical shutter
- 253 denote a shielding wall
- 254 denotes a tracking unit.
- the mirror 251 is simply used for reflecting illuminative light, and the reflection direction is controlled by the tracking unit 254 , which is similar to the tracking unit 241 of the modified example shown in FIG. 3 .
- modulation can be carried out using the optical shutter 252 allowing incident light to the mirror 251 and reflected light from the mirror 251 to pass through or be shut off.
- a liquid crystal shutter may be used as the optical shutter 252 for modulation, which controls the orientation of liquid crystal in accordance with data so as to allow reflected light to pass through or be shut off.
- other modulation methods may be used alternatively.
- reflection direction of the mirror surface may be changed in accordance with data.
- the tracking unit 254 may also be used as a modulation means.
- the shielding wall 253 is provided surrounding the mirror 251 . This is provided for protecting user's eyes from the brightness of reflected light traveling from the mirror 251 , which reflects light emitted by a light source other than the light source in the lighting side communication device 201 for communication.
- the illuminative light source 212 and the light receiving unit 213 of the lighting side communication device 201 are provided closely, only light from the illuminative light source 212 should be reflected, returning to the light receiving unit 213 , and thus reflection of other lights is unnecessary.
- the shielding wall 253 is provided for preventing such unnecessary reflection.
- the inner surface of the shielding wall 253 may be formed to be a mirror, thereby increasing reflected light intensity. Needless to say, a structure without the shielding wall 253 is possible.
- the unit shown in FIG. 5 may be used as a single structure or multiple units may be provided.
- a corner cube reflector may be used as an illuminative light reflecting means in the reflector/modulator 224 .
- FIG. 6 is a diagram describing a general view of the CCR.
- the CCR has three reflecting surfaces orthogonal to each other in an inward direction. For example, as shown in FIG. 6 , it can be structured with three inner reflecting surfaces of a cube or a rectangular, which have a shared apex and are orthogonal to one another.
- the CCR is characterized in that incident light is reflected in the same incident direction. Accordingly, when illuminative light hits, the illuminative light is then reflected toward the light source of the illuminative light. According to the present invention, illuminative light is used for a downlink, and the illuminative light used for the downlink is reflected and also used for an uplink. More specifically, since the illuminative light is reflected toward the illuminative light source, the reflected light can be received by the light receiving unit 213 arranged very close to the illuminative light source in the lighting side communication device 201 .
- the lighting side communication device 201 can be provided in an arbitrary area, and even when the terminal side communication device 202 is provided in an arbitrary area, reflected light is reflected toward the lighting side communication device 201 .
- FIGS. 7A-7C each is a diagram describing an exemplary modulation method using the CCR.
- 261 denotes the CCR
- 262 denotes an optical shutter
- 263 denotes a dielectric
- 264 denotes an actuator.
- Illuminative light can be reflected by the CCR toward the lighting side communication device 201 in the aforementioned manner.
- FIG. 7A shows an example of modulating with the optical shutter 262 arranged in front of the CCR.
- the optical shutter 262 may be structured with a liquid crystal shutter using a liquid crystal display.
- the liquid crystal orientation of the liquid crystal shutter changes due to application of a voltage, thereby switching over between a light pass-through mode and a light shut-off mode.
- this liquid crystal shutter is controlled to allow light to pass through, illuminative light from the lighting side communication device 201 hits the CCR 261 , and the resulting reflected light then travels to the lighting side communication device 201 , as described above.
- the liquid crystal shutter is controlled to shut off light, both incident light to the CCR 251 and reflected light are shut off, and the light receiving unit 213 in the lighting side communication device 201 cannot receive reflected light. In this manner, the control of liquid crystal orientation of the liquid crystal shutter allows reflected light to pass through or be shut off.
- Reflected light modulated through such a shutter operation in accordance with data may be transmitted to the lighting side communication device 201 .
- liquid crystal there are various kinds of liquid crystal, and they are available as needed.
- a type of liquid crystal capable of changing over between a light pass-through mode and a light reflecting mode is available.
- a liquid crystal shutter is used as the optical shutter 262 .
- any type of shutter mechanism capable of being controlled to allow illuminative light and reflected light entered to pass through to the CCR 261 or prevent them from passing through is available regardless of its structure.
- the dielectric 263 is deployed very close ( ⁇ /3) to part of or entirety of the mirror surface, which constitutes the CCR 261 , so as to decrease the total amount of reflection from the inner surfaces.
- the intensity of reflected light from the CCR 261 may be controlled by changing the position of the dielectric in accordance with data, allowing transmission of modulated, reflected light to the lighting side communication device 201 . Note that this method utilizes coherence, and use thereof is limited to the case where LDs are used as a light source in the lighting side communication device 201 .
- the actuator 264 is attached to one of the mirror surfaces, which constitute the CCR 261 , so as to change the mirror surface in accordance with data. For example, by changing an angle or deforming the mirror surface, a light reflected angle between adjacent mirror surfaces of the CCR 261 changes. As a result, the relationship between incident light and reflected light such that the latter returns along the former can be broken.
- Such control in accordance with data allows transmission of modulated, reflected light to the lighting side communication device 201 .
- the actuator 264 may be a structure using a driving capability of a mechanical micro machine or distortion of a piezo element.
- FIG. 8 is a graph describing exemplary waveforms of incident light to the reflector/modulator 224 and modulated reflected light, respectively.
- incident light to the reflector/modulator 224 is illuminative light that is modulated and emitted from the lighting side communication device 201 . Accordingly, light intensity or blinking is controlled in accordance with data transmitted via a downlink.
- the light is reflected by the CCR 261 , the reflected light on which data transmitted via the downlink is still being superimposed is then provided.
- the uplink data transfer rate is slower than the downlink transfer rate, there is no problem.
- illuminative light intensity changes many times during a single data transfer due to high-speed change in illuminative light intensity as shown in FIG. 8A .
- modulation is carried out and incident light is reflected by the CCR 261 as described in FIG. 7
- average light intensity between a bright and a dark area during a single data transfer is received by the light receiving unit 213 in the lighting side communication device 201 .
- the CCR 261 does not reflect light toward the light source, the light receiving unit 213 in the lighting side communication device 201 cannot even receive average light intensity. Therefore, data can be reliably transferred even using illuminative light on which data for a downlink is still being superimposed for an uplink.
- FIG. 8B shows a case of the downlink data transfer rate being equal to the uplink data transfer rate.
- sub carrier binary phase shift keying BPSK
- BPSK sub carrier binary phase shift keying
- an uplink from the terminal side communication device 202 to the illumination light communication device 201 can be established by reflecting the modulated illuminative light and then modulating it in conformity with uplink data.
- Illuminative light has large electric power, and reflected light thereof also has large electric power. This allows high-quality uplink communication.
- reflected light returns to the incident light source, there is no need for tracking, and an uplink can be established with a simple structure.
- irregular reflected light scarcely hits users' eyes, and thus the users scarcely sense brightness.
- FIG. 9 is a diagram describing an exemplary application of the illuminative light communication device which has the CCR as the reflector/modulator 224 .
- FIG. 10 is a diagram describing an exemplary received signal combining method for the multiple lighting side communication devices.
- 271 denotes light receiving devices
- 272 denotes delay correcting units
- 273 denotes a combining unit
- 274 denotes a demodulator.
- the CCR is characterized in that it returns reflected light toward the light source. This feature is the same as that in the case where incident lights from multiple directions hit. For example, as shown in FIG.
- the multiple lighting side communication devices 201 , 201 ′, and 201 ′′ can reliably receive data by combining electric signals obtained through reception of light.
- An exemplary circuit structure in this case is shown in FIG. 10 .
- the light receiving devices 271 in the respective light receiving units 213 of the respective lighting side communication devices 201 , 201 ′, and 201 ′′ convert received lights to electric signals.
- the electric signals from the light receiving devices 271 are corrected for specified amounts of delays for respective lighting side communication devices 201 , 201 ′, and 201 ′′ by the delay correcting unit 272 , and the resulting corrected electric signals are then combined by the combining unit 273 . This may be done through simple addition, average electric power calculation, and/or weighting. The higher the signal intensity, the larger weight to be added.
- the combined electronic signals are demodulated by the demodulator, allowing data transmitted from the terminal side communication device 202 to be captured.
- uplink data can be transmitted to the multiple lighting side communication devices, even if shadowing develops due to a passerby, which may cause disturbance of optical transmission to a lighting side communication device, other lighting side communication devices can receive light, allowing reliable communication. In this case, a CCR tracking mechanism is unnecessary, and disturbance of optical communication or shadowing can be solved by a simple structure.
- three lighting side communication devices are shown in FIG. 9 , but the present invention is not limited to this. Alternatively, two or four devices are available.
- a case of using a single CCR has been described above; alternatively, multiple CCRs may be provided, for example, two-dimensionally.
- a modulating structure as shown in FIG. 7 should be provided for each of CCRs 261 . By controlling all of them in the same manner, they can operate in the same manner as in the case of using a single CCR.
- the optical shutter 262 may be shared by multiple CCRs.
- FIG. 11 is a diagram describing an exemplary structure which allows parallel transmission of the reflector/modulator 224 in the terminal side communication device 202 .
- 281 denotes a CCR array
- 282 denotes a lens.
- the CCR array 281 which is made up of multiple CCRs, is structured such that respective multiple CCRs or respective groups of multiple CCRs can be controlled for modulation.
- modulation for individual CCRs 281 is required using the optical shutter 262 shown in FIG.
- an optical shutter capable of controlling for respective multiple CCRs or respective groups of multiple CCRs should be provided.
- the structure allowing CCR mirror surfaces to change as shown in FIG. 7C the same structure can be provided for individual CCRs, and control for respective multiple CCRs or respective groups of multiple CCRs is possible.
- the lens 282 is provided at the entrance (or exit) of the CCR array 281 and is controlled to form an image for illuminative lights, which have traveled from the lighting side communication devices 201 and 201 ′ on the CCR mirror surface or in the vicinity thereof.
- incident lights emitted from the lighting side communication devices 201 and 201 ′ hit only some of the CCRs in the CCR array 281 .
- the CCRs that respective incident illuminative lights hit are controlled to modulate in the same manner, the same data can be transmitted to the multiple lighting side communication devices 201 and 201 ′ as described in FIG. 9 .
- CCRs that respective incident illuminative lights hit may be controlled to modulate in accordance with different pieces of data.
- the CCRs that incident illuminative light from the lighting side communication device 201 hits and that return reflected light thereto may be controlled to modulate in accordance with a first data while CCRs that incident illuminative light from the lighting side communication device 201 ′ hits and that return reflected light thereto may be controlled to modulate in accordance with a second data.
- This allows transmission of the first data to the lighting side communication device 201 and the second data to the lighting side communication device 201 ′.
- Those pieces of data can be transmitted in parallel, allowing parallel communication.
- CCRs that incident illuminative light hits may be predetermined; a simply structured light reception device may be provided together with CCRs; a light reception device may be combined with the CCR mirror surface; and/or a two-dimensional sensor and a lens system may be used as the light receiving unit 221 in the terminal side communication device 202 to allow identification of the position of the lighting side communication device. Needless to say, other structures are available.
- the lighting side communication device 201 may be provided in the same manner as conventionally available lighting elements, and the terminal side communication device 202 may be a portable terminal device, such as a notebook computer, a PDA, or a cellular phone.
- the terminal side communication device 202 may be a portable terminal device, such as a notebook computer, a PDA, or a cellular phone.
- it is available in ordinary offices, stores, homes, public facilities, and an environment where radio wave communication is restricted such as hospitals, trains, airplanes, spaceships, and a site in which pacemaker users exist.
- use thereof is not limited to the indoors, and it is available for various applications, such as neon signs, lighting for advertisement, or communication among automobiles or among facilities on the street and automobiles in a transportation system.
- the second embodiment may be modified into various modifications as with the aforementioned first embodiment.
- the structure of the light receiving unit 213 in the lighting side communication device 201 shown in FIG. 2 and structure of the light emitting unit 222 in the terminal side communication device 202 shown in FIG. 3 may be used, and power line communication for data transmitted from and received by the lighting side communication device 201 is available. Needless to say, besides such modifications, a variety of other modifications are possible.
- the conventional illuminative light communication allows only downlink optical communication.
- the present invention allows uplink optical communication, allowing bi-directional optical communication.
- reflected illuminative light may be used for an uplink.
- high-quality communication is possible using illuminative light with large electric power.
- use of CCRs allows establishment of uplink optical communication with a simple structure that does not need tracking.
Abstract
The illuminating end communication device is equipped with an illuminating light source. An electric power fed to the light source is modulated with a modulating unit responding to transmission data, and the modulated light is sent out as illuminating light. The illumination light is received by the light receiving unit of a terminal end communication device to maintain a downlink. Light emitted from the light emitting unit of the terminal end communication device is received by the light receiving unit of the illuminating end communication device to keep an uplink. Or, illuminating light is modulated on the basis of data when it is reflected, whereby data can be transmitted to the illuminating end communication device. It is preferable that illuminating light is reflected by CCR. A high-quality communication is realized using illuminating light of high power.
Description
- This application is a continuation of U.S patent application Ser. No. 10/532,250 filed Oct. 23, 2003, as International Application No. PCT/JP03/013539, now pending, the contents of which, including specification, claims and drawings, are incorporated herein by reference in their entirety. This application claims priority from Japanese Patent Application Serial No. 2003-004560 filed Jan. 10, 2003, the contents of which are incorporated herein by reference in their entireties.
- The present invention relates to a technology that contributes to illuminative light communication.
- In recent years, a radio wave communication system has become available along with portable terminals. Recently, shorter wavelength infrared rays have been widely used due to available frequency depletion. Other than available frequency depletion, radio waves may influence medical devices or various precision equipment. Moreover, there is fear that infrared rays may adversely influence the human body (e.g., eyes). As a result, optical communication is in the spotlight as a safe communication method.
- Meanwhile, white LEDs are developed owing to the success of development of blue LEDs. The features of white LEDs are: extremely lower power consumption than that of conventional incandescent lamps or fluorescent lamps, small size, and long life. Accordingly, use of white LEDs as a illuminative light source is considered. Another feature of white LEDs is a fast response speed relative to supplied power. Paying attention to these features, a study of electrically controlling blinking or light intensity and thereby transferring a signal has been conducted.
- A study of integration of such signal transfer using white LED lights with the aforementioned power-line communication system has been conducted. For example, a proposal regarding that study has been disclosed in ‘INTEGRATED SYSTEM OF WHITE LED VISIBLE-LIGHT COMMUNICATION AND POWER-LINE COMMUNICATION’ written by inventors: T. Komine, Y. Tanaka, and M. Nakagawa, Institute of Electronics, Information, and Communication Engineers Technical Research Report, The Institute of Electronics, Information, and Communication Engineers, Mar. 12, 2002, Vol. 101, No. 726, pp. 99-104. Since such system utilizes lights, there are no effects on the human body, allowing safe communication. In addition, other applications are expected.
- The present invention aims to provide an illuminative light communication device that establishes a downlink using illuminative light, and also allows uplink optical (including infrared rays) communication, or provides, bidirectional optical communication.
- According to such objective, an illuminative light communication device, which is positioned on the transmission side for a downlink and positioned on the reception side for an uplink, includes a lighting unit that emits light for lighting a modulator that controls blinking or light intensity of the lighting unit in accordance with data, thereby modulating the emitted light, and a light receiving unit that receives modulated light transmitted from the outside. Data is transmitted via the light emitted by the lighting unit, and the data is received by the light receiving unit. This structure allows establishment of a downlink using illuminative light and an optical uplink by the light receiving unit, thereby allowing bidirectional optical communication.
- Note that the lighting unit can be made up of one or multiple LEDs, allowing establishment of a downlink using illuminative light based on the characteristics of the LEDs. In addition, the light receiving unit can receive infrared light or visible light as the modulated light. Furthermore, the light receiving unit may be a two-dimensional sensor. This allows effective removal of noise such as scattered light using received modulated light signals and the other signals. In addition, modulated light can be separated and received from multiple positions using an optical system such as a lens, and uplink data can be received from multiple light emitting sources.
- An illuminative light communication device, which is positioned on the transmission side for a downlink and positioned on the reception side for an uplink, includes a light receiving unit that receives illuminative light modulated in accordance with data, thereby capturing the data, and a light emitting unit that emits light modulated in accordance with data to be transmitted. With such structure, the light receiving unit receives downlink illuminative light while the light emitting unit establishes an optical uplink. This allows bidirectional optical communication. A mobile terminal, for example, can carry out bidirectional communication.
- Light emitted by the light emitting unit may be infrared light or visible light. In addition, the light emitting unit includes a tracking unit that guides the emitted light to an external light receiving unit, thereby allowing further reliable uplink communication.
- An illuminative light communication device, which is positioned on the transmission side for a downlink and positioned on the reception side for an uplink, includes a light receiving unit that receives illuminative light modulated in accordance with data, thereby capturing the data, and a reflecting and modulating unit that reflects the illuminative light and transmits reflected light modulated in accordance with data to be transmitted. Even this structure can provide bidirectional optical communication, where a downlink can be established using illuminative light while an uplink can be established using illuminative reflected light. Furthermore, as described above, illuminative light has very large electric power, and when it is used for an uplink, further reliable communication is possible. In addition, since a new light emitting unit is unnecessary, power consumption can be suppressed to a degree of electric power provided for modulation, which considerably contributes to power saving.
- The reflecting and modulating unit may include one or multiple corner cube reflectors (hereafter, referred to as CCR). The CCR is characterized in that incident light is reflected in the same incident direction, and transmits reflected light to a light source of the illuminative light used for a downlink. The reflected light is used for establishing an uplink. With such structure, a tracking unit for guiding light used for an uplink to a light receiving unit is unnecessary. In addition, since incident light from multiple light sources can be reflected in the same direction, respectively, when downlink data is received using illuminative light from multiple light sources, reflected light for an uplink can be transmitted to the respective light sources, thereby allowing reduction in communication error, and improvement in communication quality.
- Note that an optical shutter can be used to carry out modulation through controlling reflected light to pass through or be shut off. Alternatively, modulation can be carried out through deforming a reflecting surface of the CCR to change the reflection characteristics of the CCR.
- The reflecting and modulating unit may be made up of a corner cube modulation array is made up of multiple CCRs, a lens that is deployed to form an image on the corner cube modulation array, and a modulator that controls every one or every group of the CCRs in the corner cube modulation array to modulate reflected light. As described above, the CCR is characterized in that incident light is reflected in the same incident direction, the CCR on which an image is formed by a light source of illuminative light transmits reflected light to that light source. If there is multiple light sources, the CCRs on which images are formed by the respective light sources transmit reflected light to the corresponding light sources. Therefore, parallel transmission is possible through modulating reflected light for every one or every group of the CCRs corresponding to the respective light sources.
- Note that a structure such that an optical shutter is used as a modulator that controls every one or every group of the CCRs to modulate reflected light, or a structure such that the modulator modulates through deforming a reflecting surface of the CCR is possible.
-
FIG. 1 is a schematic block diagram of a first embodiment according to the present invention; -
FIG. 2 is a diagram describing a modified example of alight receiving unit 213 in a lightingside communication device 201; -
FIG. 3 is a diagram describing a modified example of alight emitting unit 222 in a terminalside communication device 202; -
FIG. 4 is a schematic block diagram of a second embodiment according to the present invention; -
FIG. 5 is a diagram describing an exemplary structure using a mirror as a reflector/modulator 224; -
FIG. 6 is a diagram describing a general view of a corner cube reflector (CCR); -
FIGS. 7A-7C each is a diagram describing an exemplary modulation method using the CCR;FIG. 7A is a diagram of a structure using an optical shutter;FIG. 7B is a diagram of a structure using a dielectric; andFIG. 7C is a diagram of a structure using an actuator; -
FIGS. 8A and 8B each is a graph describing exemplary waveforms of an incident light to the reflector/modulator 224 and a modulated, reflected light;FIG. 8A shows a case where a downlink data transfer rate is faster than an uplink data transfer rate; andFIG. 8B shows a case where the downlink data transfer rate is roughly equal to or less than the uplink data transfer rate; -
FIG. 9 is a diagram describing an exemplary usage of an illuminative communication device in which a CCR is provided as the reflector/modulator 224; -
FIG. 10 is a diagram describing an exemplary method of combining received signals when multiple lighting side communication devices are provided in the exemplary usage of an illuminative light communication device in which a CCR is provided as the reflector/modulator 224; and -
FIG. 11 is a diagram describing an exemplary structure of the reflector/modulator 224 in the terminalside communication device 2 capable of carrying out parallel transmission. -
FIG. 1 is a schematic block diagram of a first embodiment according to the present invention. In the drawing, 201 denotes a lighting side communication device, 202 denotes a terminal side communication device, 211 denotes a modulator, 212 denotes illuminative light sources, 213 denotes a light receiving unit, 214 denotes a filter, 221 denotes a light receiving unit, 222 denotes a light emitting unit, and 223 denotes a processor. The lightingside communication device 201 is used as a lighting element to illuminate the vicinity thereof, and includes the illuminativelight sources 212, which emit light for lighting. In this exemplary structure, a light source is LEDs, but is not limited to them. Alternatively, LDs or other light emitting devices with a fast response speed are available. - The lighting
side communication device 201 also includes themodulator 211 and thelight receiving unit 213 for illuminative light communication. Themodulator 211 ,which is deployed for a downlink, controls electric power, which is supplied to the illuminativelight sources 212, in accordance with data to be transmitted. This allows control of light intensity or blinking of the illuminativelight sources 212 and emission of light modulated in accordance with data. The terminalside communication device 202 to be described later then receives the modulated illuminative light, thereby allowing data transmission from the lightingside communication device 201 to the terminal side communication device 202 (downlink). - An arbitrary modulation system, such as on-off keying (OOK) or binary phase shift keying (BPSK), is available. In addition, all of or some of the illuminative
light sources 212 for lighting may be LEDs, which are controlled to change light intensity or blinking. Note that since LEDs have a high-speed response characteristic as described above, change in light intensity and/or blinking is imperceptible to the human eye, and seems as if light is emitted continuously. Accordingly, the illuminativelight sources 212 may be used for lighting besides data communication. - The
light receiving unit 213, which is provided for receiving modulated light (such as infrared rays, visible light, ultraviolet light) emitted from the terminalside communication device 202, includes a light receiving device such as a photodiode. In addition, in this exemplary structure, afilter 214 is provided for selectively receiving modulated light emitted from the terminalside communication device 202. For example, to receive infrared rays, thefilter 214 that allows infrared rays to pass through should be provided. Needless to say, a structure without thefilter 214 is possible. In this case, received light is converted into an electric signal, which is then demodulated. Consequently, data from the terminalside communication device 202 is reconstructed and then output. - Note that data to be transmitted via illuminative light may be data received from the outside, or data retained in or generated by the lighting
side communication device 201. Alternatively, data received by thelight receiving unit 213 may be output to the outside or processed in the lightingside communication device 201. - The terminal
side communication device 202 may be an arbitrary terminal device, and may include thelight receiving unit 221 and thelight emitting unit 222 for illuminative light communication and the processor 223 for various kinds of processing. Thelight receiving unit 221 receives and demodulates modulated light emitted from the lightingside communication device 201, and transmits the demodulated results to the processor 223. In this manner, reception of data transmitted from the lightingside communication device 201 via illuminative light is possible, or establishment of a downlink is possible. - The
light emitting unit 222, which includes a light source such as LEDs or LDs, and a control circuit for turning on and off the light sources, receives data to be transmitted from the processor 223, controls light intensity or blinking of the light sources in accordance with data, and emits the resulting modulated light. At this time, any modulation system can be used for that modulation. Alternatively, infrared rays, visible light, or ultraviolet light may be used as light to be emitted. Thelight receiving unit 213 of the lightingside communication device 201 described above then receives the modulated light, or an uplink is established. - As described above, the lighting
side communication device 201 has the illuminativelight sources 212 illuminate the vicinity thereof, and modulates the illuminative light in accordance with data, allowing transmitting the data via the illuminative light. Thelight receiving unit 221 in the terminalside communication device 202 then receives this illuminative light, thereby receiving data transmitted from the lightingside communication device 201. In this manner, a downlink is established. In addition, the terminalside communication device 202 has thelight emitting unit 222 emit modulated light in accordance with data, thereby transmitting data. Thelight receiving unit 213 of the lightingside communication device 201 then receives this modulated light, and thus the lightingside communication device 201 receives data transmitted from the terminalside communication device 202. In this manner, an uplink is established. In this manner, either downlink or uplink optical communication is possible, or bidirectional optical communication is possible. - For example, the terminal
side communication device 202 may be a mobile, portable terminal device, such as a notebook computer, a PDA, or a cellular phone, which does not need cable connection. More specifically, in the case of a PDA with a camera or a cellular phone with a camera, the camera may be used as thelight receiving unit 221. In addition, the terminalside communication device 202 is available in an environment where radio wave communication is restricted, such as a hospital, a train, an airplane, a spaceship, or a site where pacemaker users exist, and no license for use thereof is required. Needless to say, it is available in various environments, such as ordinary offices, stores, homes, and public facilities. In addition, not limited to indoors, it is available for various applications, such as neon signs, lighting for advertisement, and communication among automobiles or among facilities on the street and automobiles in a transportation system. - Moreover, optical wavelength is short, allowing very higher-speed communication than radio wave communication. Furthermore, typically, lighting elements are widely provided, and lighting is naturally provided in an environment where terminal devices are used. Such lighting elements may be used as the lighting
side communication device 201 for communication, resulting in considerable reduction in installation cost. - Note that in an environment such as an office where multiple lighting elements are provided, respective lighting elements may be used as the lighting
side communication device 201, and multiple lightingside communication devices 201 can be deployed. In this case, light emitted from a single terminalside communication device 202 can be received by the multiple lightingside communication devices 201. In this manner, light is received by the multiple lightingside communication devices 201, allowing improvement in communication quality. In addition, even when a single lightingside communication device 201 cannot receive light due to shadowing developed by a passerby, other lightingside communication devices 201 can receive that light, solving such problem of shadowing. - Next, several major modified examples of the first embodiment are described.
FIG. 2 is a diagram describing a modified example of thelight receiving unit 213 in the lightingside communication device 201. In the drawing, 231 denotes a two-dimensional sensor, and 232 denotes a lens. The two-dimensional sensor 231 is used as thelight receiving unit 213 in the lightingside communication device 201, and thelens 232 is used to form an image on the light receiving surface. With such structure, an image due to light emitted from the terminalside communication device 202 is formed on the light receiving surface of the two-dimensional sensor 231, and that light is received by some of a great number of light receiving cells provided in the two-dimensional sensor 231. At this time, since the other light receiving cells receive environmental light, background noise can be removed using it, allowing high-quality communication. - In addition, when there are multiple terminal
side communication devices side communication devices dimensional sensor 231, as shown inFIG. 2 . This allows parallel reception of data from the respective terminalside communication device - In addition, in an environment where multiple lighting
side communication devices 201 are provided, light emitted form the respective terminalside communication devices dimensional sensors 231, which are provided in the respective lightingside communication devices 201. In this case, communication quality can be improved by identifying light received points in the respective two-dimensional sensors 231 from the light received positions in the respective two-dimensional sensors 231 and the position of the lightingside communication device 201. -
FIG. 3 is a diagram describing a modified example of thelight emitting unit 222 in the terminalside communication device 202. In the drawing, 241 denotes a tracking unit, 242 denotes LED light sources, 243 denotes a mirror surface, and 244 denotes a lens. According to the basic structure shown inFIG. 1 , when theLED light sources 242 are used as the light source of thelight emitting unit 222 in the terminalside communication device 202 emitted light diverges, resulting in decrease in intensity of light received by the lightingside communication device 201.FIG. 3 shows an exemplary structure having themirror surface 243 and thelens 244 provided to prevent such divergence of emitted light and narrow a light beam. Light emitted from the LEDlight sources 242 may be effectively provided to the lightingside communication device 201 using such an optical system, allowing preferable communication. Needless to say, when LDs with high directivity are used as the light source, themirror surface 243 and thelens 244 are unnecessary. - In addition, in the case of narrowing the light beam or using LDs as a light source, communication quality decreases or communication is impossible when emitted light does not correctly hit the
light receiving unit 213 in the lightingside communication device 201. Therefore, in the exemplary structure shown inFIG. 3 , thetracking unit 241 is provided to guide the light beam to thelight receiving unit 213 in the lightingside communication device 201. Thetracking unit 241 may be structured with a movable mechanism that allows manual change in light beam direction. Alternatively, it may be structured to automatically operate according to illuminative light or operate under control of a terminal device itself. Alternatively, it may be structured to be controlled by the lightingside communication device 201 via a downlink. In this manner, there are a variety of structures to embody thetracking unit 241. - A modified example of the
light receiving unit 213 in the lightingside communication device 201 and a modified example of thelight emitting unit 222 in the terminalside communication device 202 have been described above. The present invention is not limited to those examples. For example, the structure shown inFIG. 2 may be applicable to thelight receiving unit 221 in the terminalside communication device 202. This allows parallel illuminative light transmission of different pieces of data from multiple lighting side communication devices and selective reception of those pieces of data by the terminalside communication device 202. - In addition, data to be transmitted from the lighting
side communication device 201 and data received therefrom may be transferred via a dedicated data line or may be superimposed on an electric power waveform and transmitted via a power line, which supplies electric power for lighting. Needless to say, besides the above-mentioned systems, various modifications thereof are possible. -
FIG. 4 is a schematic block diagram of a second embodiment according to of the present invention. In the drawing, the same symbols are given to the same parts as those inFIG. 1 , and repetitive descriptions thereof are thus omitted. 224 denotes a reflector/modulator. In the aforementioned first embodiment, an exemplary structure such that thelight emitting unit 222 is provided in the terminalside communication device 202 to emit light for establishment of an uplink is shown. On the other hand, the second embodiment shows a structure such that illuminative light for a downlink is used as is, and reflected light is used for an uplink. As described above, illuminative light has large electric power, and when it is used for an uplink, further reliable communication is possible. In addition, since thelight emitting unit 222 is unnecessary in the terminalside communication device 202, power consumption of the terminalside communication device 202 can be considerably suppressed, greatly contributing to power saving. Note that since the structure of the lightingside communication device 201 can be the same as those of the aforementioned first embodiment and the modified example thereof, repetitive descriptions thereof are thus omitted, and themodulator 211 is not shown in the drawing. In addition, thelight receiving unit 221 in the terminalside communication device 202 may be the same as those of the aforementioned first embodiment and the modified example thereof. - The reflector/
modulator 224 is provided in the terminalside communication device 202, which allows use of illuminative light for an uplink. The reflector/modulator 224 reflects illuminative light and transmits the resulting reflected light, which is modulated in conformity with to-be-transmitted data via an uplink. -
FIG. 5 is a diagram describing an exemplary structure with a mirror used as the reflector/modulator 224. In the drawing, 251 denotes a mirror, 252 denotes an optical shutter, 253 denote a shielding wall, and 254 denotes a tracking unit. Themirror 251 is simply used for reflecting illuminative light, and the reflection direction is controlled by thetracking unit 254, which is similar to thetracking unit 241 of the modified example shown inFIG. 3 . In addition, modulation can be carried out using theoptical shutter 252 allowing incident light to themirror 251 and reflected light from themirror 251 to pass through or be shut off. For example, a liquid crystal shutter may be used as theoptical shutter 252 for modulation, which controls the orientation of liquid crystal in accordance with data so as to allow reflected light to pass through or be shut off. Needless to say, other modulation methods may be used alternatively. For example, reflection direction of the mirror surface may be changed in accordance with data. In other words, since change in reflection direction of the mirror surface changes the intensity of incident light to thelight receiving unit 213 in the lightingside communication device 201, data can be captured by detecting this change. In this case, thetracking unit 254 may also be used as a modulation means. - In addition, in the exemplary structure shown in
FIG. 5 , the shieldingwall 253 is provided surrounding themirror 251. This is provided for protecting user's eyes from the brightness of reflected light traveling from themirror 251, which reflects light emitted by a light source other than the light source in the lightingside communication device 201 for communication. When the illuminativelight source 212 and thelight receiving unit 213 of the lightingside communication device 201 are provided closely, only light from the illuminativelight source 212 should be reflected, returning to thelight receiving unit 213, and thus reflection of other lights is unnecessary. The shieldingwall 253 is provided for preventing such unnecessary reflection. Alternatively, the inner surface of the shieldingwall 253 may be formed to be a mirror, thereby increasing reflected light intensity. Needless to say, a structure without the shieldingwall 253 is possible. - Note that the unit shown in
FIG. 5 may be used as a single structure or multiple units may be provided. - A corner cube reflector (CCR) may be used as an illuminative light reflecting means in the reflector/
modulator 224.FIG. 6 is a diagram describing a general view of the CCR. The CCR has three reflecting surfaces orthogonal to each other in an inward direction. For example, as shown inFIG. 6 , it can be structured with three inner reflecting surfaces of a cube or a rectangular, which have a shared apex and are orthogonal to one another. - The CCR is characterized in that incident light is reflected in the same incident direction. Accordingly, when illuminative light hits, the illuminative light is then reflected toward the light source of the illuminative light. According to the present invention, illuminative light is used for a downlink, and the illuminative light used for the downlink is reflected and also used for an uplink. More specifically, since the illuminative light is reflected toward the illuminative light source, the reflected light can be received by the
light receiving unit 213 arranged very close to the illuminative light source in the lightingside communication device 201. In addition, since high directivity/strongly reflected light hits thelight receiving unit 213 in the lightingside communication device 201, there is an advantage that peripheral light is difficult to adversely influence that light. Note that the lightingside communication device 201 can be provided in an arbitrary area, and even when the terminalside communication device 202 is provided in an arbitrary area, reflected light is reflected toward the lightingside communication device 201. -
FIGS. 7A-7C each is a diagram describing an exemplary modulation method using the CCR. In the drawing, 261 denotes the CCR, 262 denotes an optical shutter, 263 denotes a dielectric, and 264 denotes an actuator. Illuminative light can be reflected by the CCR toward the lightingside communication device 201 in the aforementioned manner. Several methods of modulating this reflected light in accordance with data are shown forthwith.FIG. 7A shows an example of modulating with theoptical shutter 262 arranged in front of the CCR. Theoptical shutter 262 may be structured with a liquid crystal shutter using a liquid crystal display. The liquid crystal orientation of the liquid crystal shutter changes due to application of a voltage, thereby switching over between a light pass-through mode and a light shut-off mode. When this liquid crystal shutter is controlled to allow light to pass through, illuminative light from the lightingside communication device 201 hits theCCR 261, and the resulting reflected light then travels to the lightingside communication device 201, as described above. On the other hand, when the liquid crystal shutter is controlled to shut off light, both incident light to theCCR 251 and reflected light are shut off, and thelight receiving unit 213 in the lightingside communication device 201 cannot receive reflected light. In this manner, the control of liquid crystal orientation of the liquid crystal shutter allows reflected light to pass through or be shut off. Reflected light modulated through such a shutter operation in accordance with data may be transmitted to the lightingside communication device 201. Needless to say, there are various kinds of liquid crystal, and they are available as needed. For example, a type of liquid crystal capable of changing over between a light pass-through mode and a light reflecting mode is available. In addition, in this exemplary structure, a liquid crystal shutter is used as theoptical shutter 262. Alternatively, any type of shutter mechanism capable of being controlled to allow illuminative light and reflected light entered to pass through to theCCR 261 or prevent them from passing through is available regardless of its structure. - In the example shown in
FIG. 7B , the dielectric 263 is deployed very close (λ/3) to part of or entirety of the mirror surface, which constitutes theCCR 261, so as to decrease the total amount of reflection from the inner surfaces. The intensity of reflected light from theCCR 261 may be controlled by changing the position of the dielectric in accordance with data, allowing transmission of modulated, reflected light to the lightingside communication device 201. Note that this method utilizes coherence, and use thereof is limited to the case where LDs are used as a light source in the lightingside communication device 201. - In the example shown in
FIG. 7C , theactuator 264 is attached to one of the mirror surfaces, which constitute theCCR 261, so as to change the mirror surface in accordance with data. For example, by changing an angle or deforming the mirror surface, a light reflected angle between adjacent mirror surfaces of theCCR 261 changes. As a result, the relationship between incident light and reflected light such that the latter returns along the former can be broken. Such control in accordance with data allows transmission of modulated, reflected light to the lightingside communication device 201. Theactuator 264 may be a structure using a driving capability of a mechanical micro machine or distortion of a piezo element. -
FIG. 8 is a graph describing exemplary waveforms of incident light to the reflector/modulator 224 and modulated reflected light, respectively. As described above, incident light to the reflector/modulator 224 is illuminative light that is modulated and emitted from the lightingside communication device 201. Accordingly, light intensity or blinking is controlled in accordance with data transmitted via a downlink. When the light is reflected by theCCR 261, the reflected light on which data transmitted via the downlink is still being superimposed is then provided. However, when the uplink data transfer rate is slower than the downlink transfer rate, there is no problem. For example, if the uplink data transfer rate is slow, illuminative light intensity changes many times during a single data transfer due to high-speed change in illuminative light intensity as shown inFIG. 8A . For example, when modulation is carried out and incident light is reflected by theCCR 261 as described inFIG. 7 , average light intensity between a bright and a dark area during a single data transfer is received by thelight receiving unit 213 in the lightingside communication device 201. On the other hand, when theCCR 261 does not reflect light toward the light source, thelight receiving unit 213 in the lightingside communication device 201 cannot even receive average light intensity. Therefore, data can be reliably transferred even using illuminative light on which data for a downlink is still being superimposed for an uplink. - On the other hand, when the downlink data transfer rate is roughly equal to or lower than the uplink data transfer rate, reflected illuminative light is available for an uplink if there is no time when illuminative light is completely shut off.
FIG. 8B shows a case of the downlink data transfer rate being equal to the uplink data transfer rate. In this example, sub carrier binary phase shift keying (BPSK) is used as a downlink data modulation system. In this case, since illuminative light intensity never continuously stay in zero during single data transfer, thelight receiving unit 213 in the lightingside communication device 201 can receive uplink data through sensing change in received light intensity even when modulation is carried out by allowing illuminative light to pass through or be shut off for an uplink. - In this manner, even when illuminative light is modulated, an uplink from the terminal
side communication device 202 to the illuminationlight communication device 201 can be established by reflecting the modulated illuminative light and then modulating it in conformity with uplink data. Illuminative light has large electric power, and reflected light thereof also has large electric power. This allows high-quality uplink communication. In addition, since with a structure of using theCCR 261, reflected light returns to the incident light source, there is no need for tracking, and an uplink can be established with a simple structure. Moreover, there is an advantage that it is unnecessary to synchronize with the downlink. Furthermore, when using theCCR 261, irregular reflected light scarcely hits users' eyes, and thus the users scarcely sense brightness. -
FIG. 9 is a diagram describing an exemplary application of the illuminative light communication device which has the CCR as the reflector/modulator 224.FIG. 10 is a diagram describing an exemplary received signal combining method for the multiple lighting side communication devices. In the drawing, 271 denotes light receiving devices, 272 denotes delay correcting units, 273 denotes a combining unit, and 274 denotes a demodulator. As described above, the CCR is characterized in that it returns reflected light toward the light source. This feature is the same as that in the case where incident lights from multiple directions hit. For example, as shown inFIG. 9 , when multiple lightingside communication devices side communication device 202, illuminative light from the lightingside communication device 201 is reflected thereto by the CCR in the terminalside communication device 202, illuminative light from the lightingside communication device 201′ is reflected thereto, and illuminative light from the lightingside communication device 201″ is reflected thereto. As a result, uplink data transmitted from the terminalside communication device 202 is received by the multiple lightingside communication devices - The multiple lighting
side communication devices FIG. 10 . Thelight receiving devices 271 in the respectivelight receiving units 213 of the respective lightingside communication devices light receiving devices 271 are corrected for specified amounts of delays for respective lightingside communication devices delay correcting unit 272, and the resulting corrected electric signals are then combined by the combiningunit 273. This may be done through simple addition, average electric power calculation, and/or weighting. The higher the signal intensity, the larger weight to be added. The combined electronic signals are demodulated by the demodulator, allowing data transmitted from the terminalside communication device 202 to be captured. - In this manner, since uplink data can be transmitted to the multiple lighting side communication devices, even if shadowing develops due to a passerby, which may cause disturbance of optical transmission to a lighting side communication device, other lighting side communication devices can receive light, allowing reliable communication. In this case, a CCR tracking mechanism is unnecessary, and disturbance of optical communication or shadowing can be solved by a simple structure. Note that three lighting side communication devices are shown in
FIG. 9 , but the present invention is not limited to this. Alternatively, two or four devices are available. - A case of using a single CCR has been described above; alternatively, multiple CCRs may be provided, for example, two-dimensionally. When multiple CCRs are provided, a modulating structure as shown in
FIG. 7 should be provided for each ofCCRs 261. By controlling all of them in the same manner, they can operate in the same manner as in the case of using a single CCR. For example, with a structure where theoptical shutter 262 is used for modulation as shown inFIG. 7A , theoptical shutter 262 may be shared by multiple CCRs. - In the case of providing multiple CCRs, it is possible to control respective multiple CCRs or respective groups of multiple CCRs to modulate. With such a structure, parallel data transmission from the terminal
side communication device 202 is possible.FIG. 11 is a diagram describing an exemplary structure which allows parallel transmission of the reflector/modulator 224 in the terminalside communication device 202. In the drawing, 281 denotes a CCR array, and 282 denotes a lens. TheCCR array 281, which is made up of multiple CCRs, is structured such that respective multiple CCRs or respective groups of multiple CCRs can be controlled for modulation. When modulation forindividual CCRs 281 is required using theoptical shutter 262 shown inFIG. 7A , an optical shutter capable of controlling for respective multiple CCRs or respective groups of multiple CCRs should be provided. In addition, with the structure allowing CCR mirror surfaces to change as shown inFIG. 7C , the same structure can be provided for individual CCRs, and control for respective multiple CCRs or respective groups of multiple CCRs is possible. - The
lens 282 is provided at the entrance (or exit) of theCCR array 281 and is controlled to form an image for illuminative lights, which have traveled from the lightingside communication devices side communication devices CCR array 281. According to the characteristics of the CCR, some of the CCRs that incident illuminative light from the lightingside communication device 201 hits return reflected light thereto, while some of the CCRs that incident illuminative light from the lightingside communication device 201′ hits return reflected light thereto. At this time, when the CCRs that respective incident illuminative lights hit are controlled to modulate in the same manner, the same data can be transmitted to the multiple lightingside communication devices FIG. 9 . - Alternatively, CCRs that respective incident illuminative lights hit may be controlled to modulate in accordance with different pieces of data. In other words, the CCRs that incident illuminative light from the lighting
side communication device 201 hits and that return reflected light thereto may be controlled to modulate in accordance with a first data while CCRs that incident illuminative light from the lightingside communication device 201′ hits and that return reflected light thereto may be controlled to modulate in accordance with a second data. This allows transmission of the first data to the lightingside communication device 201 and the second data to the lightingside communication device 201′. Those pieces of data can be transmitted in parallel, allowing parallel communication. - Note that: CCRs that incident illuminative light hits may be predetermined; a simply structured light reception device may be provided together with CCRs; a light reception device may be combined with the CCR mirror surface; and/or a two-dimensional sensor and a lens system may be used as the
light receiving unit 221 in the terminalside communication device 202 to allow identification of the position of the lighting side communication device. Needless to say, other structures are available. - The example of using reflected illuminative light for an uplink has been described above as the second embodiment. As with the aforementioned first embodiment, in the second embodiment, the lighting
side communication device 201 may be provided in the same manner as conventionally available lighting elements, and the terminalside communication device 202 may be a portable terminal device, such as a notebook computer, a PDA, or a cellular phone. In addition, it is available in ordinary offices, stores, homes, public facilities, and an environment where radio wave communication is restricted such as hospitals, trains, airplanes, spaceships, and a site in which pacemaker users exist. Furthermore, use thereof is not limited to the indoors, and it is available for various applications, such as neon signs, lighting for advertisement, or communication among automobiles or among facilities on the street and automobiles in a transportation system. - Moreover, the second embodiment may be modified into various modifications as with the aforementioned first embodiment. The structure of the
light receiving unit 213 in the lightingside communication device 201 shown inFIG. 2 and structure of thelight emitting unit 222 in the terminalside communication device 202 shown inFIG. 3 may be used, and power line communication for data transmitted from and received by the lightingside communication device 201 is available. Needless to say, besides such modifications, a variety of other modifications are possible. - As described above, the conventional illuminative light communication allows only downlink optical communication. However, the present invention allows uplink optical communication, allowing bi-directional optical communication.
- In addition, reflected illuminative light may be used for an uplink. In this case, high-quality communication is possible using illuminative light with large electric power. Furthermore, use of CCRs allows establishment of uplink optical communication with a simple structure that does not need tracking.
Claims (16)
1. An illuminative light communication device, comprising:
a lighting unit that emits light for lighting;
a modulator that controls blinking or light intensity of the lighting unit in accordance with data, thereby modulating the emitted light; and
a light receiving unit that receives modulated light transmitted from the outside; wherein data is transmitted via the light emitted by the lighting unit, and the data is received by the light receiving unit.
2. The illuminative light communication device according to claim 1 , wherein the lighting unit is made up of one or a plurality of LEDs.
3. The illuminative light communication device according to claim 1 , wherein the light receiving unit receives infrared light as the modulated light.
4. The illuminative light communication device according to claim 1 , wherein the light receiving unit receives visible light as the modulated light.
5. The illuminative light communication device according to claim 1 , wherein the light receiving unit is a two-dimensional sensor.
6. An illuminative light communication device, comprising:
a light receiving unit that receives illuminative light modulated in accordance with data, thereby capturing the data; and
a light emitting unit that emits light modulated in accordance with data to be transmitted.
7. The illuminative light communication device according to claim 1 , wherein the light emitting unit emits infrared light.
8. The illuminative light communication device according to claim 1 , wherein the light emitting unit emits visible light.
9. The illuminative light communication device according to claim 6 , wherein the light emitting unit comprises a tracking unit that guides the emitted light to an external light receiving unit.
10. An illuminative light communication device, comprising:
a light receiving unit that receives illuminative light modulated in accordance with data, thereby capturing the data; and
a reflecting and modulating unit that reflects the illuminative light and transmits reflected light modulated in accordance with data to be transmitted.
11. The illuminative light communication device according to claim 10 , wherein the reflecting and modulating unit is structured including one or a plurality of corner cube reflectors, and transmits reflected light to a light source of the illuminative light.
12. The illuminative light communication device according to claim 10 , wherein the reflecting and modulating unit uses an optical shutter to carry out modulation.
13. The illuminative light communication device according to claim 11 , wherein the reflecting and modulating unit modulates through deforming a reflecting surface of the corner cube reflector.
14. The illuminative light communication device according to claim 10 , wherein the reflecting and modulating unit comprises:
a corner cube modulation array comprising a plurality of corner cube reflectors;
a lens that is deployed to form an image on the corner cube modulation array; and
a modulator that controls every one or every group of the corner cube reflectors in the corner cube modulation array to modulate reflected light.
15. The illuminative light communication device according to claim 14 , wherein the modulator is an optical shutter.
16. The illuminative light communication device according to claim 14 , wherein the modulator modulates through deforming a reflecting surface of the corner cube reflector.
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JP2003161859A JP2004282685A (en) | 2003-06-06 | 2003-06-06 | Mobile optical communication system and mobile optical communication method |
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Cited By (40)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080219676A1 (en) * | 2007-03-07 | 2008-09-11 | Kabushiki Kaisha Toshiba | Transmitting device, receiving device, and optical communication method |
US20090027511A1 (en) * | 2005-03-25 | 2009-01-29 | Nikon Corporation | Illumination Device, Imaging Device, and Imaging System |
US20100254714A1 (en) * | 2007-09-11 | 2010-10-07 | Oscar Cristobal Gaete Jamett | Data transmission with room illuminations having light emitting diodes |
US20110293286A1 (en) * | 2010-05-25 | 2011-12-01 | Leddynamics, Inc. | Method for optical data transmission using existing indicator or illumination lamp |
US20110305460A1 (en) * | 2010-06-14 | 2011-12-15 | Snyder Mark W | Portable light providing illumination and data |
US20120008959A1 (en) * | 2009-09-19 | 2012-01-12 | Samsung Electronics Co., Ltd. | Apparatus and method for supporting mobility of a mobile terminal that performs visible light communication |
US20120195598A1 (en) * | 2009-09-01 | 2012-08-02 | University Court Of The Univerity Of St Andrews | Communication system |
US20120321321A1 (en) * | 2011-06-14 | 2012-12-20 | Scott Riesebosch | Methods of communication utilizing an led lamp |
US8492995B2 (en) | 2011-10-07 | 2013-07-23 | Environmental Light Technologies Corp. | Wavelength sensing lighting system and associated methods |
US8515289B2 (en) * | 2011-11-21 | 2013-08-20 | Environmental Light Technologies Corp. | Wavelength sensing lighting system and associated methods for national security application |
US20130266325A1 (en) * | 2012-04-10 | 2013-10-10 | Disney Enterprises, Inc. | Visible light communication with flickering prevention |
US20140050487A1 (en) * | 2011-04-26 | 2014-02-20 | Huawei Technologies Co., Ltd. | Wireless communication method, base station and system |
US8680457B2 (en) | 2012-05-07 | 2014-03-25 | Lighting Science Group Corporation | Motion detection system and associated methods having at least one LED of second set of LEDs to vary its voltage |
US20140270793A1 (en) * | 2013-03-15 | 2014-09-18 | Cree, Inc. | Optical communication for solid-state light sources |
US20150139660A1 (en) * | 2011-07-12 | 2015-05-21 | Samsung Electronics Co., Ltd. | Method of visible light communication using illuminance sensor and mobile communication terminal for the same |
US20150195036A1 (en) * | 2011-03-08 | 2015-07-09 | Samsung Electronics Co., Ltd. | Wireless network system, wireless device, and network registration method of the wireless device |
US9264138B2 (en) | 2013-05-16 | 2016-02-16 | Disney Enterprises, Inc. | Reliable visibile light communication with dark light synchronization |
US9377639B2 (en) | 2014-02-19 | 2016-06-28 | Panasonic Intellectual Property Corporation Of America | Transmitter and transmitting method |
US20160281963A1 (en) * | 2015-03-27 | 2016-09-29 | Orange | Combined illumination and optical communication device |
US9591232B2 (en) | 2012-12-27 | 2017-03-07 | Panasonic Intellectual Property Corporation Of America | Information communication method |
US9608725B2 (en) | 2012-12-27 | 2017-03-28 | Panasonic Intellectual Property Corporation Of America | Information processing program, reception program, and information processing apparatus |
US9608727B2 (en) | 2012-12-27 | 2017-03-28 | Panasonic Intellectual Property Corporation Of America | Switched pixel visible light transmitting method, apparatus and program |
US9613596B2 (en) | 2012-12-27 | 2017-04-04 | Panasonic Intellectual Property Corporation Of America | Video display method using visible light communication image including stripe patterns having different pitches |
US9635278B2 (en) | 2012-12-27 | 2017-04-25 | Panasonic Intellectual Property Corporation Of America | Information communication method for obtaining information specified by striped pattern of bright lines |
US9641766B2 (en) | 2012-12-27 | 2017-05-02 | Panasonic Intellectual Property Corporation Of America | Information communication method |
US9646568B2 (en) | 2012-12-27 | 2017-05-09 | Panasonic Intellectual Property Corporation Of America | Display method |
US9713234B2 (en) | 2015-04-10 | 2017-07-18 | Panasonic Intellectual Property Management Co., Ltd. | Lighting fixture, lighting system, and method performed by the lighting fixture |
US9768869B2 (en) | 2012-12-27 | 2017-09-19 | Panasonic Intellectual Property Corporation Of America | Information communication method |
US9918016B2 (en) | 2012-12-27 | 2018-03-13 | Panasonic Intellectual Property Corporation Of America | Information communication apparatus, method, and recording medium using switchable normal mode and visible light communication mode |
US9960847B2 (en) | 2015-09-10 | 2018-05-01 | Panasonic Intellectual Property Management Co., Ltd. | Information presenting method, server, and information presenting system |
US10148354B2 (en) | 2012-12-27 | 2018-12-04 | Panasonic Intellectual Property Corporation Of America | Luminance change information communication method |
US10225014B2 (en) | 2012-12-27 | 2019-03-05 | Panasonic Intellectual Property Corporation Of America | Information communication method for obtaining information using ID list and bright line image |
US10303945B2 (en) | 2012-12-27 | 2019-05-28 | Panasonic Intellectual Property Corporation Of America | Display method and display apparatus |
US10461861B2 (en) * | 2015-12-31 | 2019-10-29 | Garmin Switzerland Gmbh | Photovoltaic receiver optimised for communication by coded light |
US20190376653A1 (en) * | 2016-11-29 | 2019-12-12 | Orange | Device for lighting and optical communication combined with viewing of the communication field |
US10507063B2 (en) * | 2014-11-21 | 2019-12-17 | Think Surgical, Inc. | Visible light communication system for transmitting data between visual tracking systems and tracking markers |
US10523876B2 (en) | 2012-12-27 | 2019-12-31 | Panasonic Intellectual Property Corporation Of America | Information communication method |
US10530486B2 (en) | 2012-12-27 | 2020-01-07 | Panasonic Intellectual Property Corporation Of America | Transmitting method, transmitting apparatus, and program |
US10951310B2 (en) | 2012-12-27 | 2021-03-16 | Panasonic Intellectual Property Corporation Of America | Communication method, communication device, and transmitter |
US11282823B2 (en) * | 2017-10-18 | 2022-03-22 | Osram Oled Gmbh | Semiconductor device |
Families Citing this family (463)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006041486A1 (en) * | 2004-10-01 | 2006-04-20 | Franklin Philip G | Method and apparatus for the zonal transmission of data using building lighting fixtures |
US20130243425A1 (en) * | 1996-12-24 | 2013-09-19 | Convergence Wireless, Inc. | Method and apparatus for the zonal transmission of data using building lighting fixtures |
US8188878B2 (en) | 2000-11-15 | 2012-05-29 | Federal Law Enforcement Development Services, Inc. | LED light communication system |
US8536985B1 (en) * | 2001-07-30 | 2013-09-17 | Imaging Systems Technology, Inc. | Data isolation |
FR2852168B1 (en) | 2003-03-06 | 2005-04-29 | Excem | DIGITAL METHOD AND DEVICE FOR TRANSMISSION WITH LOW CROSSTALK |
FR2852467B1 (en) | 2003-03-13 | 2005-07-15 | Excem | METHOD AND DEVICE FOR TRANSMISSION WITHOUT CROSSTALK |
JP2005218066A (en) * | 2004-02-02 | 2005-08-11 | Nakagawa Kenkyusho:Kk | Positional information communication device |
US10499465B2 (en) | 2004-02-25 | 2019-12-03 | Lynk Labs, Inc. | High frequency multi-voltage and multi-brightness LED lighting devices and systems and methods of using same |
US10575376B2 (en) | 2004-02-25 | 2020-02-25 | Lynk Labs, Inc. | AC light emitting diode and AC LED drive methods and apparatus |
WO2011143510A1 (en) | 2010-05-12 | 2011-11-17 | Lynk Labs, Inc. | Led lighting system |
WO2005086375A1 (en) * | 2004-03-03 | 2005-09-15 | Nec Corporation | Positioning system, positioning method, and program thereof |
US11394436B2 (en) | 2004-04-02 | 2022-07-19 | Rearden, Llc | System and method for distributed antenna wireless communications |
US10985811B2 (en) | 2004-04-02 | 2021-04-20 | Rearden, Llc | System and method for distributed antenna wireless communications |
US11309943B2 (en) | 2004-04-02 | 2022-04-19 | Rearden, Llc | System and methods for planned evolution and obsolescence of multiuser spectrum |
US10886979B2 (en) | 2004-04-02 | 2021-01-05 | Rearden, Llc | System and method for link adaptation in DIDO multicarrier systems |
US9312929B2 (en) | 2004-04-02 | 2016-04-12 | Rearden, Llc | System and methods to compensate for Doppler effects in multi-user (MU) multiple antenna systems (MAS) |
US11451275B2 (en) | 2004-04-02 | 2022-09-20 | Rearden, Llc | System and method for distributed antenna wireless communications |
US10425134B2 (en) | 2004-04-02 | 2019-09-24 | Rearden, Llc | System and methods for planned evolution and obsolescence of multiuser spectrum |
US10749582B2 (en) | 2004-04-02 | 2020-08-18 | Rearden, Llc | Systems and methods to coordinate transmissions in distributed wireless systems via user clustering |
WO2005117304A1 (en) * | 2004-05-31 | 2005-12-08 | Casio Computer Co., Ltd. | Information reception device, information transmission system, and information reception method |
WO2006001237A1 (en) | 2004-06-25 | 2006-01-05 | Nec Corporation | Article position management system, article position management method, terminal device, server, and article position management program |
US9685997B2 (en) | 2007-08-20 | 2017-06-20 | Rearden, Llc | Systems and methods to enhance spatial diversity in distributed-input distributed-output wireless systems |
JP2006085594A (en) * | 2004-09-17 | 2006-03-30 | Nec Corp | Visible light information providing device and system, visible light information reader, visible light information providing method, its program and computer readable information recording medium with the program recorded |
FR2875653B1 (en) * | 2004-09-20 | 2006-10-20 | Excem Sa | TRANSMISSION DEVICE FOR OPTICAL TRANSMISSION IN FREE SPACE |
US8254791B2 (en) * | 2004-09-22 | 2012-08-28 | Kyocera Corporation | Optical transmitting apparatus and optical communication system |
US7689175B2 (en) * | 2005-01-21 | 2010-03-30 | Sony Corporation | Configurable frequency band elimination for powerline network |
GB2424777A (en) * | 2005-04-01 | 2006-10-04 | Agilent Technologies Inc | Transmitting a wake-up instruction to a receiving device by modulating data on illumination light, such as that provided by an electroluminescent room light. |
EP1882395B1 (en) | 2005-04-22 | 2019-06-19 | Signify Holding B.V. | Method and system for lighting control |
KR100614518B1 (en) * | 2005-07-29 | 2006-08-22 | (주)포스트미디어 | Infrared rays tag equipment including radiation instrument offering infrared rays |
US7570246B2 (en) * | 2005-08-01 | 2009-08-04 | Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. | Method and apparatus for communication using pulse-width-modulated visible light |
JP4643403B2 (en) * | 2005-09-13 | 2011-03-02 | 株式会社東芝 | Visible light communication system and method |
JP4325604B2 (en) * | 2005-09-30 | 2009-09-02 | 日本電気株式会社 | Visible light control device, visible light communication device, visible light control method and program |
JP4849872B2 (en) * | 2005-11-04 | 2012-01-11 | パナソニック株式会社 | Electrical device, visible light communication method, and circuit module |
US7977942B2 (en) * | 2005-11-16 | 2011-07-12 | Board Of Regents, The University Of Texas System | Apparatus and method for tracking movement of a target |
KR100725945B1 (en) * | 2006-01-03 | 2007-06-11 | 삼성전자주식회사 | Broadcasting signal retransmitting system and method using illuminated light communication |
DE102006003846A1 (en) * | 2006-01-26 | 2007-08-09 | Siemens Ag | Device and method for transmitting at least one secret parameter within a room and an arrangement with at least one transmitter and one room |
CN101026413B (en) * | 2006-02-17 | 2012-01-04 | 华为技术有限公司 | Lighting light wireless communication system |
RU2428797C2 (en) * | 2006-03-02 | 2011-09-10 | Конинклейке Филипс Электроникс Н.В. | Illumination device |
FR2898226B1 (en) * | 2006-03-06 | 2009-03-06 | Excem Soc Par Actions Simplifi | ELECTROLUMINESCENT TRANSMISSION DEVICE FOR OPTICAL TRANSMISSION IN FREE SPACE |
JP2007274566A (en) * | 2006-03-31 | 2007-10-18 | Nakagawa Kenkyusho:Kk | Illumination light communication device |
KR100790181B1 (en) * | 2006-04-24 | 2008-01-02 | 삼성전자주식회사 | Illumination light communication system and method thereof |
DE602007013754D1 (en) * | 2006-06-23 | 2011-05-19 | Koninkl Philips Electronics Nv | METHOD AND DEVICE FOR CONTROLLING AN ARRANGEMENT OF LIGHT SOURCES |
DE602007005647D1 (en) * | 2006-06-28 | 2010-05-12 | Koninkl Philips Electronics Nv | METHOD AND DEVICE FOR MODULATING THE LIGHT EMISSION OF A LIGHTING DEVICE |
TW200642316A (en) * | 2006-06-29 | 2006-12-01 | Formolight Technologies Inc | Light-illumination communication method |
KR101271293B1 (en) * | 2006-09-06 | 2013-06-04 | 삼성전자주식회사 | Hand over system of illumination light communication and method therefor |
EP2074658B1 (en) * | 2006-09-28 | 2010-03-24 | Philips Intellectual Property & Standards GmbH | Solid-state light source with color feedback and combined communication means |
DE102006046489B4 (en) * | 2006-09-29 | 2020-08-13 | Tridonic Gmbh & Co Kg | Method and system for wireless communication between several operating devices for lamps |
KR101272440B1 (en) * | 2006-10-18 | 2013-06-07 | 삼성전자주식회사 | Video signal output device for providing data signal using back light unit and method thereof |
KR100770918B1 (en) * | 2006-10-20 | 2007-10-26 | 삼성전자주식회사 | Apparatus and method for controlling emitted visible light color according to current state in visible light optical communication |
WO2008050729A1 (en) * | 2006-10-23 | 2008-05-02 | Panasonic Corporation | Optical space transmission system using visible light and infrared light |
KR100810297B1 (en) * | 2006-10-31 | 2008-03-06 | 삼성전자주식회사 | Wireless communication interface for portable wireless terminal |
KR100834621B1 (en) | 2006-11-22 | 2008-06-02 | 삼성전자주식회사 | Optical transceiver for visible light communication and optical communication system using the same |
US20080122994A1 (en) * | 2006-11-28 | 2008-05-29 | Honeywell International Inc. | LCD based communicator system |
DE102007006097A1 (en) * | 2007-02-02 | 2008-08-07 | Kwasny Gmbh | Two-component pressure box with sealed release mechanism |
US8059972B2 (en) * | 2007-03-01 | 2011-11-15 | Taiyo Yuden Co., Ltd. | Optical receiver and visible light communication system |
KR100875925B1 (en) * | 2007-03-22 | 2008-12-26 | 한국전자통신연구원 | High Power Efficiency Optical-Wireless Senders |
US20080253202A1 (en) * | 2007-04-13 | 2008-10-16 | Motorola, Inc. | Communicating Information Using an Existing Light Source of an Electronic Device |
US7917034B2 (en) * | 2007-04-13 | 2011-03-29 | Motorola Mobility, Inc. | Synchronization and processing of secure information via optically transmitted data |
KR101355302B1 (en) * | 2007-05-11 | 2014-02-05 | 삼성전자주식회사 | Navigation system and method using visible light communication |
US11265082B2 (en) | 2007-05-24 | 2022-03-01 | Federal Law Enforcement Development Services, Inc. | LED light control assembly and system |
US9258864B2 (en) | 2007-05-24 | 2016-02-09 | Federal Law Enforcement Development Services, Inc. | LED light control and management system |
US9100124B2 (en) | 2007-05-24 | 2015-08-04 | Federal Law Enforcement Development Services, Inc. | LED Light Fixture |
US9455783B2 (en) | 2013-05-06 | 2016-09-27 | Federal Law Enforcement Development Services, Inc. | Network security and variable pulse wave form with continuous communication |
US9414458B2 (en) | 2007-05-24 | 2016-08-09 | Federal Law Enforcement Development Services, Inc. | LED light control assembly and system |
US9294198B2 (en) * | 2007-05-24 | 2016-03-22 | Federal Law Enforcement Development Services, Inc. | Pulsed light communication key |
WO2008148050A1 (en) | 2007-05-24 | 2008-12-04 | Federal Law Enforcement Development Services, Inc. | Led light interior room and building communication system |
JP4859761B2 (en) * | 2007-06-13 | 2012-01-25 | パナソニック株式会社 | Optical space transmission equipment |
EP2223570A2 (en) * | 2007-06-18 | 2010-09-01 | Koninklijke Philips Electronics N.V. | Direction controllable lighting unit |
KR101375015B1 (en) * | 2007-07-06 | 2014-03-14 | 삼성전자주식회사 | Apparatus and method for communication link keeping visibility using visible light communication |
CN101378613B (en) * | 2007-08-27 | 2012-07-04 | 佶益投资股份有限公司 | LED light source and LED lamp body |
US7974536B2 (en) * | 2007-09-06 | 2011-07-05 | Motorola Mobility, Inc. | System and method for pre-configuring and authenticating data communication links |
US11317495B2 (en) | 2007-10-06 | 2022-04-26 | Lynk Labs, Inc. | LED circuits and assemblies |
US10986714B2 (en) | 2007-10-06 | 2021-04-20 | Lynk Labs, Inc. | Lighting system having two or more LED packages having a specified separation distance |
US11297705B2 (en) | 2007-10-06 | 2022-04-05 | Lynk Labs, Inc. | Multi-voltage and multi-brightness LED lighting devices and methods of using same |
US20090122045A1 (en) * | 2007-11-09 | 2009-05-14 | Kabushiki Kaisha Toshiba | Power Source Display Apparatus, Power Source Display Method, and Electronic Apparatus |
US8118447B2 (en) | 2007-12-20 | 2012-02-21 | Altair Engineering, Inc. | LED lighting apparatus with swivel connection |
KR101508976B1 (en) * | 2007-12-31 | 2015-04-10 | 삼성전자주식회사 | navigation system and method using visible light communication |
KR101442836B1 (en) | 2008-01-07 | 2014-11-04 | 삼성전자주식회사 | Method for providing additional information of video using visible communication and apparatus for the same |
DE102008062674B3 (en) | 2008-12-17 | 2010-06-17 | Osram Gesellschaft mit beschränkter Haftung | Method for controlling the radiation behavior of luminaires in an arrangement of a plurality of luminaires and arrangement of a plurality of luminaires |
JP2009186203A (en) * | 2008-02-04 | 2009-08-20 | B-Core Inc | Optical recognition data display method and marking method by light-emitting object with a plurality of colors, light-emitting device, and data and position detection method |
JP2009225196A (en) * | 2008-03-17 | 2009-10-01 | Tamura Seisakusho Co Ltd | Visible light communication system and optical wireless lan device |
JP2009222579A (en) * | 2008-03-17 | 2009-10-01 | Kyocera Corp | Navigation apparatus and navigation method |
US9163518B2 (en) * | 2008-03-18 | 2015-10-20 | United Technologies Corporation | Full coverage trailing edge microcircuit with alternating converging exits |
JP5374202B2 (en) | 2008-03-28 | 2013-12-25 | 株式会社プランナーズランド | Visible light communication device |
JP4654264B2 (en) * | 2008-04-10 | 2011-03-16 | シャープ株式会社 | Optical communication device and electronic equipment |
US8390291B2 (en) * | 2008-05-19 | 2013-03-05 | The Board Of Regents, The University Of Texas System | Apparatus and method for tracking movement of a target |
US8360599B2 (en) | 2008-05-23 | 2013-01-29 | Ilumisys, Inc. | Electric shock resistant L.E.D. based light |
US8294483B2 (en) | 2008-05-30 | 2012-10-23 | Freescale Semiconductor, Inc. | Testing of multiple integrated circuits |
US8032030B2 (en) | 2008-05-30 | 2011-10-04 | Freescale Semiconductor, Inc. | Multiple core system |
EP2297878B1 (en) * | 2008-06-11 | 2019-01-23 | Philips Lighting Holding B.V. | Optical receiver for an illumination system |
GB2460721A (en) * | 2008-06-13 | 2009-12-16 | Red Dot Technologies Ltd | Electrical apparatus having operation status indicator which cn transmit parameter values |
DE102008041337A1 (en) * | 2008-08-19 | 2010-02-25 | Robert Bosch Gmbh | IR optics for audio transmission |
US8441216B2 (en) * | 2008-09-03 | 2013-05-14 | ALVA Systems, Inc. | Power supply system for a building |
US8674913B2 (en) | 2008-09-05 | 2014-03-18 | Ketra, Inc. | LED transceiver front end circuitry and related methods |
US8456092B2 (en) * | 2008-09-05 | 2013-06-04 | Ketra, Inc. | Broad spectrum light source calibration systems and related methods |
US8471496B2 (en) * | 2008-09-05 | 2013-06-25 | Ketra, Inc. | LED calibration systems and related methods |
US20110063214A1 (en) * | 2008-09-05 | 2011-03-17 | Knapp David J | Display and optical pointer systems and related methods |
US9509525B2 (en) | 2008-09-05 | 2016-11-29 | Ketra, Inc. | Intelligent illumination device |
US9276766B2 (en) | 2008-09-05 | 2016-03-01 | Ketra, Inc. | Display calibration systems and related methods |
US10210750B2 (en) * | 2011-09-13 | 2019-02-19 | Lutron Electronics Co., Inc. | System and method of extending the communication range in a visible light communication system |
US8521035B2 (en) * | 2008-09-05 | 2013-08-27 | Ketra, Inc. | Systems and methods for visible light communication |
US8773336B2 (en) * | 2008-09-05 | 2014-07-08 | Ketra, Inc. | Illumination devices and related systems and methods |
US8886047B2 (en) | 2008-09-05 | 2014-11-11 | Ketra, Inc. | Optical communication device, method and system |
JP4653828B2 (en) * | 2008-09-12 | 2011-03-16 | 株式会社東芝 | Visible light communication system and visible light communication apparatus |
US8687977B2 (en) | 2008-09-18 | 2014-04-01 | Sennheiser Electronic Gmbh & Co. Kg | Reading lamp |
US8653984B2 (en) | 2008-10-24 | 2014-02-18 | Ilumisys, Inc. | Integration of LED lighting control with emergency notification systems |
US8324817B2 (en) | 2008-10-24 | 2012-12-04 | Ilumisys, Inc. | Light and light sensor |
US7938562B2 (en) | 2008-10-24 | 2011-05-10 | Altair Engineering, Inc. | Lighting including integral communication apparatus |
US8901823B2 (en) | 2008-10-24 | 2014-12-02 | Ilumisys, Inc. | Light and light sensor |
US8214084B2 (en) | 2008-10-24 | 2012-07-03 | Ilumisys, Inc. | Integration of LED lighting with building controls |
WO2010064175A1 (en) * | 2008-12-04 | 2010-06-10 | Koninklijke Philips Electronics N.V. | Illumination device and method for embedding a data signal in a luminance output using ac driven light sources |
KR200453114Y1 (en) * | 2009-01-30 | 2011-04-13 | 주식회사 메자인 | Monitor Type Cigarette Signboard for Indoor |
KR100921954B1 (en) | 2009-01-30 | 2009-10-23 | 주식회사 아이디로 | Visible ray multiple communication system |
KR101042772B1 (en) | 2009-02-13 | 2011-06-20 | 삼성전자주식회사 | Method for driving color lamp and apparatus thereof |
KR20100094910A (en) * | 2009-02-19 | 2010-08-27 | 삼성전자주식회사 | Apparatus for controlling lighting equipment for lighting communication |
KR20110131226A (en) | 2009-02-26 | 2011-12-06 | 코닌클리즈케 필립스 일렉트로닉스 엔.브이. | Routing messages over a network of interconnected devices of a networked control system |
WO2010101635A1 (en) * | 2009-03-03 | 2010-09-10 | Piccionelli Gregory A | Ornament apparatus, system and method |
US8890773B1 (en) | 2009-04-01 | 2014-11-18 | Federal Law Enforcement Development Services, Inc. | Visible light transceiver glasses |
JP5591321B2 (en) * | 2009-04-08 | 2014-09-17 | コーニンクレッカ フィリップス エヌ ヴェ | Efficient address assignment in coded lighting systems |
JP5272863B2 (en) * | 2009-04-14 | 2013-08-28 | ソニー株式会社 | Transmission apparatus, imaging apparatus, and transmission method |
CN103945589B (en) | 2009-05-28 | 2016-12-07 | Lynk实验室公司 | Multivoltage and many brightness led lighting devices and the method using them |
US9800017B1 (en) | 2009-05-29 | 2017-10-24 | Soraa Laser Diode, Inc. | Laser device and method for a vehicle |
US20100322635A1 (en) * | 2009-06-18 | 2010-12-23 | Sony Ericsson Mobile Communications Ab | Using ambient led light for broadcasting info and navigation |
EP2454922A4 (en) * | 2009-07-12 | 2017-03-29 | Firefly Green Technologies Inc. | Intelligent illumination device |
KR101596471B1 (en) * | 2009-08-24 | 2016-02-23 | 삼성디스플레이 주식회사 | Visible light communications system |
KR101101889B1 (en) * | 2009-09-03 | 2012-01-05 | 유영호 | Lighting system for cultivation of plants |
EP2478653B1 (en) * | 2009-09-17 | 2014-07-23 | Universität Duisburg-Essen | Transmitter and receiver for transceiving optical signals |
US8639124B2 (en) | 2009-09-18 | 2014-01-28 | Interdigital Patent Holdings, Inc. | Method and apparatus for dimming with rate control for visible light communications (VLC) |
KR101269211B1 (en) | 2009-09-24 | 2013-05-30 | 한국전자통신연구원 | Textile-type interface devices for optical communication in wearable computing system |
KR20110037229A (en) * | 2009-10-06 | 2011-04-13 | 삼성전자주식회사 | Display apparatus, system and method for outputting data thereof |
KR101654934B1 (en) * | 2009-10-31 | 2016-09-23 | 삼성전자주식회사 | Visible communication method and apparatus |
FR2953080B1 (en) * | 2009-11-24 | 2012-01-13 | Hmi Innovation | LED LIGHTING DEVICE INCORPORATING IMPROVED ORDER |
KR101656525B1 (en) * | 2010-01-08 | 2016-09-12 | 삼성전자주식회사 | Apparatus and method for transmitting synchronized data using visible light communication |
KR20110083961A (en) * | 2010-01-15 | 2011-07-21 | 삼성전자주식회사 | System and method for indoor navigation using led lamp |
EP2529364B1 (en) | 2010-01-29 | 2014-07-02 | Avery Dennison Corporation | Rfid/nfc panel and/or array used in smart signage applications and method of using |
US10977965B2 (en) | 2010-01-29 | 2021-04-13 | Avery Dennison Retail Information Services, Llc | Smart sign box using electronic interactions |
KR100991062B1 (en) * | 2010-03-12 | 2010-10-29 | 한상규 | Transmission device for visible light communication and power control method of visible light in transmission device |
US8540401B2 (en) | 2010-03-26 | 2013-09-24 | Ilumisys, Inc. | LED bulb with internal heat dissipating structures |
CA2792940A1 (en) | 2010-03-26 | 2011-09-19 | Ilumisys, Inc. | Led light with thermoelectric generator |
US9288525B2 (en) | 2010-04-27 | 2016-03-15 | Interdigital Patent Holdings, Inc | Inter-device communications using visible light |
US8837954B2 (en) * | 2010-05-25 | 2014-09-16 | Rf Code, Inc. | Asset tracking system for rack-based enclosures |
JP5499905B2 (en) | 2010-05-28 | 2014-05-21 | 三菱電機株式会社 | Display / lighting device |
JP2011254317A (en) * | 2010-06-02 | 2011-12-15 | Sony Corp | Transmission device, transmission method, reception device, reception method, communication system and communication method |
JP2011254285A (en) * | 2010-06-02 | 2011-12-15 | Jamco Corp | Visible light radio communication apparatus for aircraft cabin amusement system |
US8261971B2 (en) | 2010-06-30 | 2012-09-11 | Hong Kong Applied Science And Technology Research | Self-powered electronic label |
CN101909389A (en) * | 2010-07-07 | 2010-12-08 | 四川电力试验研究院 | Energy-saving monitoring system of wireless communication street lamp |
JP5842090B2 (en) * | 2010-08-25 | 2016-01-13 | パナソニックIpマネジメント株式会社 | Illumination light communication device |
USRE49454E1 (en) * | 2010-09-30 | 2023-03-07 | Lutron Technology Company Llc | Lighting control system |
US9386668B2 (en) | 2010-09-30 | 2016-07-05 | Ketra, Inc. | Lighting control system |
US20120093517A1 (en) * | 2010-10-15 | 2012-04-19 | Samsung Electronics Co., Ltd. | Cell design and mobility support for visible light communication |
US8523394B2 (en) | 2010-10-29 | 2013-09-03 | Ilumisys, Inc. | Mechanisms for reducing risk of shock during installation of light tube |
EP2455840A1 (en) * | 2010-11-02 | 2012-05-23 | Sony Ericsson Mobile Communications AB | Communication device and method |
JP5959150B2 (en) * | 2011-01-12 | 2016-08-02 | オリンパス株式会社 | Endoscope system |
CA2824756C (en) | 2011-01-14 | 2014-12-23 | Federal Law Enforcement Development Services, Inc. | Method of providing lumens and tracking of lumen consumption |
JP5752945B2 (en) * | 2011-01-24 | 2015-07-22 | オリンパス株式会社 | Endoscope system |
DE102011003516A1 (en) * | 2011-02-02 | 2012-08-02 | Osram Ag | Emergency power box has semiconductor light source that is utilized for displaying usage data and for optically transmitting the usage data |
WO2012113856A1 (en) | 2011-02-25 | 2012-08-30 | Trilite Technologies Gmbh | Display device with movement elements for obtaining a high resolution and/or a 3d effect |
KR101247901B1 (en) * | 2011-04-19 | 2013-03-26 | 영남대학교 산학협력단 | Visible light transmitter, visible light receiver, visible light communication system |
US8666254B2 (en) * | 2011-04-26 | 2014-03-04 | The Boeing Company | System and method of wireless optical communication |
JP2014527255A (en) | 2011-05-17 | 2014-10-09 | ピクシー・ライティング・エルエルシイ | Flat panel lighting system and retrofit kit |
US20140085642A1 (en) * | 2011-05-17 | 2014-03-27 | Industry-University Cooperation Foundation Hanyang University | Lighting apparatus for measuring the position of a mobile terminal, and position measuring system using same |
KR101797946B1 (en) * | 2011-05-25 | 2017-12-12 | 삼성전자주식회사 | Self diagnostic system of home appliance and operating method the same |
US8928735B2 (en) * | 2011-06-14 | 2015-01-06 | Microsoft Corporation | Combined lighting, projection, and image capture without video feedback |
US8749172B2 (en) | 2011-07-08 | 2014-06-10 | Ketra, Inc. | Luminance control for illumination devices |
US8416290B2 (en) | 2011-07-26 | 2013-04-09 | ByteLight, Inc. | Method and system for digital pulse recognition demodulation |
US8457502B2 (en) | 2011-07-26 | 2013-06-04 | ByteLight, Inc. | Method and system for modulating a beacon light source in a light based positioning system |
US9723676B2 (en) | 2011-07-26 | 2017-08-01 | Abl Ip Holding Llc | Method and system for modifying a beacon light source for use in a light based positioning system |
US8334898B1 (en) | 2011-07-26 | 2012-12-18 | ByteLight, Inc. | Method and system for configuring an imaging device for the reception of digital pulse recognition information |
US8436896B2 (en) | 2011-07-26 | 2013-05-07 | ByteLight, Inc. | Method and system for demodulating a digital pulse recognition signal in a light based positioning system using a Fourier transform |
US8334901B1 (en) | 2011-07-26 | 2012-12-18 | ByteLight, Inc. | Method and system for modulating a light source in a light based positioning system using a DC bias |
US9418115B2 (en) | 2011-07-26 | 2016-08-16 | Abl Ip Holding Llc | Location-based mobile services and applications |
US8866391B2 (en) | 2011-07-26 | 2014-10-21 | ByteLight, Inc. | Self identifying modulated light source |
US9444547B2 (en) | 2011-07-26 | 2016-09-13 | Abl Ip Holding Llc | Self-identifying one-way authentication method using optical signals |
US8432438B2 (en) | 2011-07-26 | 2013-04-30 | ByteLight, Inc. | Device for dimming a beacon light source used in a light based positioning system |
US8964016B2 (en) | 2011-07-26 | 2015-02-24 | ByteLight, Inc. | Content delivery based on a light positioning system |
US8520065B2 (en) | 2011-07-26 | 2013-08-27 | ByteLight, Inc. | Method and system for video processing to determine digital pulse recognition tones |
WO2013016439A1 (en) * | 2011-07-26 | 2013-01-31 | ByteLight, Inc. | Self identifying modulater light source |
US9787397B2 (en) * | 2011-07-26 | 2017-10-10 | Abl Ip Holding Llc | Self identifying modulated light source |
US8994799B2 (en) | 2011-07-26 | 2015-03-31 | ByteLight, Inc. | Method and system for determining the position of a device in a light based positioning system using locally stored maps |
EP2745634B1 (en) | 2011-08-17 | 2016-01-20 | Koninklijke Philips N.V. | Method and system for localisation on a dc lighting and power grid |
WO2013026053A1 (en) | 2011-08-18 | 2013-02-21 | Lynk Labs, Inc. | Devices and systems having ac led circuits and methods of driving the same |
US9072171B2 (en) | 2011-08-24 | 2015-06-30 | Ilumisys, Inc. | Circuit board mount for LED light |
CN102957481A (en) * | 2011-08-31 | 2013-03-06 | 深圳光启高等理工研究院 | Method and system for converting signals of photo-communication sending end |
WO2013033522A1 (en) | 2011-09-01 | 2013-03-07 | Avery Dennison Corporation | Apparatus, system and method for consumer tracking |
DE102011082490A1 (en) | 2011-09-12 | 2013-03-14 | Siemens Aktiengesellschaft | Light profile hose |
KR20130037997A (en) * | 2011-10-07 | 2013-04-17 | 한국전자통신연구원 | System and method for wireless communication using directive communication |
US8630908B2 (en) | 2011-11-02 | 2014-01-14 | Avery Dennison Corporation | Distributed point of sale, electronic article surveillance, and product information system, apparatus and method |
US8547036B2 (en) * | 2011-11-20 | 2013-10-01 | Available For Licensing | Solid state light system with broadband optical communication capability |
WO2013082609A1 (en) | 2011-12-02 | 2013-06-06 | Lynk Labs, Inc. | Color temperature controlled and low thd led lighting devices and systems and methods of driving the same |
US8842009B2 (en) | 2012-06-07 | 2014-09-23 | Mojo Labs, Inc. | Multiple light sensor multiple light fixture control |
US8749146B2 (en) | 2011-12-05 | 2014-06-10 | Mojo Labs, Inc. | Auto commissioning of light fixture using optical bursts |
US8749145B2 (en) | 2011-12-05 | 2014-06-10 | Mojo Labs, Inc. | Determination of lighting contributions for light fixtures using optical bursts |
US20140334825A1 (en) * | 2011-12-06 | 2014-11-13 | Koninklijke Philips N.V. | Protocols for coded light communications |
KR20130093699A (en) * | 2011-12-23 | 2013-08-23 | 삼성전자주식회사 | Apparatus for receiving and transmitting optical information |
WO2013100743A1 (en) | 2011-12-31 | 2013-07-04 | Lee Moon Key | Flicker-free color visible light communication system |
CN104041191B (en) * | 2012-01-17 | 2016-12-07 | 皇家飞利浦有限公司 | Use remotely the visible light communication luminaire of control, remote control unit, system and method |
DE102012001398B4 (en) | 2012-01-26 | 2015-09-24 | Airbus Defence and Space GmbH | Transmission device for free-space optical data communication based on discrete power levels and use |
US9184518B2 (en) | 2012-03-02 | 2015-11-10 | Ilumisys, Inc. | Electrical connector header for an LED-based light |
TWI467935B (en) * | 2012-03-06 | 2015-01-01 | Ind Tech Res Inst | Visible light communication transceiver and system |
JP2013188844A (en) * | 2012-03-14 | 2013-09-26 | Hitachi Koki Co Ltd | Electric tool and method of transmitting data |
JP5936902B2 (en) * | 2012-04-13 | 2016-06-22 | 株式会社東芝 | Transmission system, transmission device and reception device |
DE102012206691A1 (en) * | 2012-04-24 | 2013-10-24 | Zumtobel Lighting Gmbh | Road and path lighting system |
SI2858269T1 (en) | 2012-05-24 | 2018-06-29 | Panasonic Intellectual Property Corporation Of America | Information communication method |
JP2013257212A (en) * | 2012-06-12 | 2013-12-26 | Ricoh Co Ltd | Light device, communication device and positional information management system |
US8958700B2 (en) | 2012-06-15 | 2015-02-17 | Vlc Co., Ltd. | Spatial light communication device |
EP2675084B1 (en) * | 2012-06-15 | 2019-01-23 | VLC Co., Ltd. | Content supplying system which uses spatial light |
DE102012012362B3 (en) * | 2012-06-22 | 2013-08-01 | Bundesrepublik Deutschland, vertreten durch das Bundesministerium der Verteidigung, dieses vertreten durch das Bundesamt für Ausrüstung, Informationstechnik und Nutzung der Bundeswehr | Device for establishing communication between military vehicles, has radio station to which message received back over second radio device is sent such that radio station is paged with same message from radio devices |
JP6019442B2 (en) | 2012-06-22 | 2016-11-02 | 株式会社アウトスタンディングテクノロジー | Content provision system using spatial light transmission |
US9872367B2 (en) * | 2012-07-01 | 2018-01-16 | Cree, Inc. | Handheld device for grouping a plurality of lighting fixtures |
US9163794B2 (en) | 2012-07-06 | 2015-10-20 | Ilumisys, Inc. | Power supply assembly for LED-based light tube |
US20180048178A1 (en) * | 2013-06-25 | 2018-02-15 | Energous Corporation | System and methods of using electromagnetic waves to wirelessly deliver power to electronic devices |
US10965164B2 (en) | 2012-07-06 | 2021-03-30 | Energous Corporation | Systems and methods of wirelessly delivering power to a receiver device |
US11502551B2 (en) | 2012-07-06 | 2022-11-15 | Energous Corporation | Wirelessly charging multiple wireless-power receivers using different subsets of an antenna array to focus energy at different locations |
US10992185B2 (en) | 2012-07-06 | 2021-04-27 | Energous Corporation | Systems and methods of using electromagnetic waves to wirelessly deliver power to game controllers |
US9271367B2 (en) | 2012-07-09 | 2016-02-23 | Ilumisys, Inc. | System and method for controlling operation of an LED-based light |
JP5994486B2 (en) * | 2012-08-27 | 2016-09-21 | 富士通株式会社 | Optical transmission system, optical transmission method, and optical module |
CN102868449A (en) * | 2012-09-05 | 2013-01-09 | 华中科技大学 | Visible light communication-based underground radio communication system |
NL2009458C2 (en) * | 2012-09-13 | 2014-03-18 | Eldolab Holding Bv | Led fixture and led lighting arrangement comprising such led fixture. |
WO2014039089A1 (en) | 2012-09-10 | 2014-03-13 | Avery Dennison Corporation | Method for preventing unauthorized diversion of nfc tags |
CN103684595B (en) * | 2012-09-18 | 2019-07-09 | 中兴通讯股份有限公司 | Visible light communication system |
CN103684529B (en) * | 2012-09-20 | 2018-01-23 | 中兴通讯股份有限公司 | Method for transmitting signals and device |
EP2713229B1 (en) | 2012-09-26 | 2017-11-08 | Siemens Aktiengesellschaft | Method for transmission of address, diagnosis and/or configuration information, infrastructure apparatus and diagnostic apparatus |
US9917644B2 (en) * | 2012-10-09 | 2018-03-13 | Booz Allen Hamilton Inc. | Method and system for data transmission and communication using imperceptible differences in visible light |
EP3214572B1 (en) | 2012-10-18 | 2020-01-29 | Avery Dennison Corporation | System and apparatus for nfc security |
WO2014063150A2 (en) * | 2012-10-19 | 2014-04-24 | Daniel Ryan | Self-identifying one-way authentication method using optical signals |
JP2014094624A (en) * | 2012-11-08 | 2014-05-22 | Honda Motor Co Ltd | Vehicle display device |
US9767329B2 (en) | 2012-11-19 | 2017-09-19 | Avery Dennison Retail Information Services, Llc | NFC tags with proximity detection |
US20140143034A1 (en) * | 2012-11-19 | 2014-05-22 | Axlen, Inc. | Optical communications via illumination light of led lighting system |
US11050468B2 (en) | 2014-04-16 | 2021-06-29 | Rearden, Llc | Systems and methods for mitigating interference within actively used spectrum |
US11190947B2 (en) | 2014-04-16 | 2021-11-30 | Rearden, Llc | Systems and methods for concurrent spectrum usage within actively used spectrum |
US10194346B2 (en) | 2012-11-26 | 2019-01-29 | Rearden, Llc | Systems and methods for exploiting inter-cell multiplexing gain in wireless cellular systems via distributed input distributed output technology |
US11189917B2 (en) * | 2014-04-16 | 2021-11-30 | Rearden, Llc | Systems and methods for distributing radioheads |
WO2014082646A1 (en) * | 2012-11-29 | 2014-06-05 | Sabry Abdo El-Alfy | An intelligent energy saving lighting device |
CN103034193B (en) * | 2012-11-30 | 2016-08-24 | 广州广日电气设备有限公司 | City intelligent terminal |
US8913144B2 (en) | 2012-12-27 | 2014-12-16 | Panasonic Intellectual Property Corporation Of America | Information communication method |
CN104885382B (en) * | 2012-12-27 | 2017-08-22 | 松下电器(美国)知识产权公司 | Visible light signal of communication display methods and display device |
CN107370539B (en) * | 2012-12-27 | 2019-12-20 | 松下电器(美国)知识产权公司 | Visible light communication method, visible light communication device, recording medium, and server |
US9166683B2 (en) | 2013-02-14 | 2015-10-20 | Qualcomm Incorporated | Methods and apparatus for efficient joint power line and visible light communication |
US9245443B2 (en) | 2013-02-21 | 2016-01-26 | The Boeing Company | Passenger services system for an aircraft |
US9118415B2 (en) * | 2013-02-26 | 2015-08-25 | Cooper Technologies Company | Visible light communication with increased signal-to-noise ratio |
JP2016518638A (en) | 2013-03-12 | 2016-06-23 | フィリップス ライティング ホールディング ビー ヴィ | Emergency manager for lighting equipment |
US10164698B2 (en) | 2013-03-12 | 2018-12-25 | Rearden, Llc | Systems and methods for exploiting inter-cell multiplexing gain in wireless cellular systems via distributed input distributed output technology |
US9265112B2 (en) | 2013-03-13 | 2016-02-16 | Federal Law Enforcement Development Services, Inc. | LED light control and management system |
US9804024B2 (en) | 2013-03-14 | 2017-10-31 | Mojo Labs, Inc. | Light measurement and/or control translation for daylighting |
US9285084B2 (en) | 2013-03-14 | 2016-03-15 | Ilumisys, Inc. | Diffusers for LED-based lights |
US10547358B2 (en) | 2013-03-15 | 2020-01-28 | Rearden, Llc | Systems and methods for radio frequency calibration exploiting channel reciprocity in distributed input distributed output wireless communications |
US8971715B2 (en) * | 2013-03-15 | 2015-03-03 | Jingxi Zhang | Apparatus and methods of displaying messages for electronic devices |
US9310064B2 (en) * | 2013-03-17 | 2016-04-12 | Bao Tran | Liquid cooled light bulb |
CN103235536B (en) * | 2013-04-12 | 2015-09-02 | 青岛海尔空调电子有限公司 | A kind of alternating current-direct current communication self-reacting device and method |
US9476552B2 (en) | 2013-04-17 | 2016-10-25 | Pixi Lighting, Inc. | LED light fixture and assembly method therefor |
US9500328B2 (en) | 2013-04-17 | 2016-11-22 | Pixi Lighting, Inc. | Lighting assembly |
US9546781B2 (en) | 2013-04-17 | 2017-01-17 | Ever Venture Solutions, Inc. | Field-serviceable flat panel lighting device |
US9407367B2 (en) * | 2013-04-25 | 2016-08-02 | Beijing Guo Cheng Wan Tong Information Co. Ltd | Methods and devices for transmitting/obtaining information by visible light signals |
WO2014193334A1 (en) | 2013-05-26 | 2014-12-04 | Intel Corporation | Apparatus, system and method of communicating positioning information |
US9705600B1 (en) | 2013-06-05 | 2017-07-11 | Abl Ip Holding Llc | Method and system for optical communication |
JP6184776B2 (en) * | 2013-07-04 | 2017-08-23 | ローム株式会社 | Visible light communication system |
WO2015001444A1 (en) * | 2013-07-04 | 2015-01-08 | Koninklijke Philips N.V. | Distance or position determination |
WO2015005912A1 (en) * | 2013-07-10 | 2015-01-15 | Intel Corporation | Apparatus, system and method of communicating positioning transmissions |
CA2856896A1 (en) | 2013-07-18 | 2015-01-18 | Spo Systems Inc. Limited | Virtual video patrol system and components therefor |
US9360174B2 (en) | 2013-12-05 | 2016-06-07 | Ketra, Inc. | Linear LED illumination device with improved color mixing |
US9155155B1 (en) | 2013-08-20 | 2015-10-06 | Ketra, Inc. | Overlapping measurement sequences for interference-resistant compensation in light emitting diode devices |
US9578724B1 (en) | 2013-08-20 | 2017-02-21 | Ketra, Inc. | Illumination device and method for avoiding flicker |
US9651632B1 (en) | 2013-08-20 | 2017-05-16 | Ketra, Inc. | Illumination device and temperature calibration method |
US9332598B1 (en) | 2013-08-20 | 2016-05-03 | Ketra, Inc. | Interference-resistant compensation for illumination devices having multiple emitter modules |
US9247605B1 (en) | 2013-08-20 | 2016-01-26 | Ketra, Inc. | Interference-resistant compensation for illumination devices |
US9237620B1 (en) | 2013-08-20 | 2016-01-12 | Ketra, Inc. | Illumination device and temperature compensation method |
US9345097B1 (en) | 2013-08-20 | 2016-05-17 | Ketra, Inc. | Interference-resistant compensation for illumination devices using multiple series of measurement intervals |
US9769899B2 (en) | 2014-06-25 | 2017-09-19 | Ketra, Inc. | Illumination device and age compensation method |
USRE48955E1 (en) | 2013-08-20 | 2022-03-01 | Lutron Technology Company Llc | Interference-resistant compensation for illumination devices having multiple emitter modules |
USRE48956E1 (en) | 2013-08-20 | 2022-03-01 | Lutron Technology Company Llc | Interference-resistant compensation for illumination devices using multiple series of measurement intervals |
DE102013109085A1 (en) * | 2013-08-22 | 2015-02-26 | Inotec Sicherheitstechnik Gmbh | Method for providing luminaire parameters at an interface of a luminaire, luminaire with an interface for reading luminaire parameters and device for reading out the luminaire parameters |
JP6092049B2 (en) * | 2013-08-28 | 2017-03-08 | 東芝ライフスタイル株式会社 | Imaging system and imaging apparatus |
EP2846611B1 (en) * | 2013-09-06 | 2015-12-23 | Tridonic GmbH & Co. KG | Driver circuit for a light source and method of transmitting data over a power line |
US9496955B2 (en) | 2013-09-19 | 2016-11-15 | eocys, LLC | Devices and methods to produce and receive an encoded light signature |
US9736895B1 (en) | 2013-10-03 | 2017-08-15 | Ketra, Inc. | Color mixing optics for LED illumination device |
US9267650B2 (en) | 2013-10-09 | 2016-02-23 | Ilumisys, Inc. | Lens for an LED-based light |
DE102013018363B4 (en) * | 2013-11-02 | 2019-12-05 | Audi Ag | Method and system for data transmission in motor vehicle production |
EP2871708B1 (en) | 2013-11-07 | 2021-06-16 | Swisscom AG | Communication cable with illumination |
JP5839018B2 (en) | 2013-11-07 | 2016-01-06 | カシオ計算機株式会社 | Information terminal, communication system, server, communication method and program |
JP6371158B2 (en) * | 2013-11-14 | 2018-08-08 | ルネサスエレクトロニクス株式会社 | LED lamp, projector, data processing method, and collision prevention apparatus |
KR101505650B1 (en) * | 2013-11-15 | 2015-03-25 | 한국광기술원 | wireless energy and data transmission system using light for mobile phone |
CN103561525B (en) * | 2013-11-18 | 2015-05-27 | 北京格林曼光电科技有限公司 | Optical communication device based on white light LED illumination |
US9439269B2 (en) | 2013-11-21 | 2016-09-06 | General Electric Company | Powerline luminaire communications |
US10509101B2 (en) | 2013-11-21 | 2019-12-17 | General Electric Company | Street lighting communications, control, and special services |
US9646495B2 (en) | 2013-11-21 | 2017-05-09 | General Electric Company | Method and system for traffic flow reporting, forecasting, and planning |
US9420674B2 (en) | 2013-11-21 | 2016-08-16 | General Electric Company | System and method for monitoring street lighting luminaires |
US9621265B2 (en) | 2013-11-21 | 2017-04-11 | General Electric Company | Street lighting control, monitoring, and data transportation system and method |
WO2015077767A1 (en) | 2013-11-25 | 2015-05-28 | Daniel Ryan | System and method for communication with a mobile device via a positioning system including rf communication devices and modulated beacon light sources |
US9146028B2 (en) | 2013-12-05 | 2015-09-29 | Ketra, Inc. | Linear LED illumination device with improved rotational hinge |
DE102013226378A1 (en) * | 2013-12-18 | 2015-06-18 | BSH Hausgeräte GmbH | System with a household appliance and a functional module, household appliance, functional module and corresponding method |
EP3092732A1 (en) * | 2014-01-10 | 2016-11-16 | Palmer Labs, LLC | Diverged-beam communications system |
US20150198941A1 (en) | 2014-01-15 | 2015-07-16 | John C. Pederson | Cyber Life Electronic Networking and Commerce Operating Exchange |
CN106063381A (en) | 2014-01-22 | 2016-10-26 | 伊卢米斯公司 | LED-based light with addressed LEDs |
FR3017691B1 (en) * | 2014-02-14 | 2019-06-28 | Zedel | PORTABLE ELECTRIC LAMP WITH WIRELESS COMMUNICATION SYSTEM |
CN103812230B (en) * | 2014-02-21 | 2016-02-24 | 北京智谷睿拓技术服务有限公司 | Wireless energy transfer method and apparatus |
KR101680128B1 (en) * | 2014-03-11 | 2016-11-28 | 한국전자통신연구원 | Apparatus and method for managing shop using lighting network and visible light communication |
CH709355A1 (en) * | 2014-03-13 | 2015-09-15 | Alessandro Pasquali | Method and systems for connections using light beams. |
DE102014004170A1 (en) | 2014-03-21 | 2015-09-24 | Ceag Notlichtsysteme Gmbh | Emergency lighting system and corresponding procedure |
US10484828B2 (en) | 2014-03-25 | 2019-11-19 | Osram Sylvania Inc. | Techniques for indoor navigation with occupancy tracking and location tracking via light-based communication |
EP3123637B1 (en) * | 2014-03-25 | 2022-05-04 | Osram Sylvania Inc. | Techniques for indoor navigation with hazard avoidance via light-based communication |
US10256905B2 (en) * | 2014-03-25 | 2019-04-09 | Osram Sylvania Inc. | Commissioning a luminaire with location information |
US20150280820A1 (en) * | 2014-03-25 | 2015-10-01 | Osram Sylvania Inc. | Techniques for adaptive light modulation in light-based communication |
US9621266B2 (en) * | 2014-03-25 | 2017-04-11 | Osram Sylvania Inc. | Techniques for raster line alignment in light-based communication |
US10237953B2 (en) * | 2014-03-25 | 2019-03-19 | Osram Sylvania Inc. | Identifying and controlling light-based communication (LCom)-enabled luminaires |
KR101586938B1 (en) | 2014-03-27 | 2016-01-29 | 국민대학교산학협력단 | Color independent visual-mimo communication system and method using the color-space-based image processing |
US11290162B2 (en) | 2014-04-16 | 2022-03-29 | Rearden, Llc | Systems and methods for mitigating interference within actively used spectrum |
US9510400B2 (en) | 2014-05-13 | 2016-11-29 | Ilumisys, Inc. | User input systems for an LED-based light |
US20150341113A1 (en) * | 2014-05-20 | 2015-11-26 | The Boeing Company | Lighting and data communication system using a remotely located lighting array |
US20150349882A1 (en) * | 2014-05-27 | 2015-12-03 | Honeywell International Inc. | Wireless data communication using airborne lighting and ground support systems |
US10290067B1 (en) | 2014-06-05 | 2019-05-14 | ProSports Technologies, LLC | Wireless concession delivery |
US10592924B1 (en) | 2014-06-05 | 2020-03-17 | ProSports Technologies, LLC | Managing third party interactions with venue communications |
US9635506B1 (en) | 2014-06-05 | 2017-04-25 | ProSports Technologies, LLC | Zone based wireless player communications |
US9648452B1 (en) | 2014-06-05 | 2017-05-09 | ProSports Technologies, LLC | Wireless communication driven by object tracking |
US10161786B2 (en) | 2014-06-25 | 2018-12-25 | Lutron Ketra, Llc | Emitter module for an LED illumination device |
US9392663B2 (en) | 2014-06-25 | 2016-07-12 | Ketra, Inc. | Illumination device and method for controlling an illumination device over changes in drive current and temperature |
US9736903B2 (en) | 2014-06-25 | 2017-08-15 | Ketra, Inc. | Illumination device and method for calibrating and controlling an illumination device comprising a phosphor converted LED |
US9557214B2 (en) | 2014-06-25 | 2017-01-31 | Ketra, Inc. | Illumination device and method for calibrating an illumination device over changes in temperature, drive current, and time |
JP6434724B2 (en) * | 2014-07-01 | 2018-12-05 | パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカPanasonic Intellectual Property Corporation of America | Information communication method |
EP3164967B1 (en) * | 2014-07-02 | 2018-08-29 | Arçelik Anonim Sirketi | Electrical household appliance network communication method |
US9760572B1 (en) | 2014-07-11 | 2017-09-12 | ProSports Technologies, LLC | Event-based content collection for network-based distribution |
US9965938B1 (en) | 2014-07-11 | 2018-05-08 | ProSports Technologies, LLC | Restroom queue management |
US9591336B2 (en) | 2014-07-11 | 2017-03-07 | ProSports Technologies, LLC | Camera feed distribution from event venue virtual seat cameras |
WO2016007967A1 (en) | 2014-07-11 | 2016-01-14 | ProSports Technologies, LLC | Ball tracker snippets |
US9498678B2 (en) | 2014-07-11 | 2016-11-22 | ProSports Technologies, LLC | Ball tracker camera |
US9655027B1 (en) | 2014-07-11 | 2017-05-16 | ProSports Technologies, LLC | Event data transmission to eventgoer devices |
US9892371B1 (en) | 2014-07-28 | 2018-02-13 | ProSports Technologies, LLC | Queue information transmission |
US9729644B1 (en) | 2014-07-28 | 2017-08-08 | ProSports Technologies, LLC | Event and fantasy league data transmission to eventgoer devices |
JP6379811B2 (en) * | 2014-07-30 | 2018-08-29 | カシオ計算機株式会社 | Display device, display control method, and display control program |
US9607497B1 (en) | 2014-08-25 | 2017-03-28 | ProSports Technologies, LLC | Wireless communication security system |
US9742894B2 (en) | 2014-08-25 | 2017-08-22 | ProSports Technologies, LLC | Disposable connectable wireless communication receiver |
US9392660B2 (en) | 2014-08-28 | 2016-07-12 | Ketra, Inc. | LED illumination device and calibration method for accurately characterizing the emission LEDs and photodetector(s) included within the LED illumination device |
US9510416B2 (en) | 2014-08-28 | 2016-11-29 | Ketra, Inc. | LED illumination device and method for accurately controlling the intensity and color point of the illumination device over time |
US9699523B1 (en) | 2014-09-08 | 2017-07-04 | ProSports Technologies, LLC | Automated clip creation |
JP6405820B2 (en) | 2014-09-17 | 2018-10-17 | 富士通株式会社 | Signal transmission device, signal transmission method, and signal transmission program |
CN105490756A (en) * | 2014-09-17 | 2016-04-13 | 施耐德电器工业公司 | Device, system and method for utilizing display backlight to realize wireless data transmission |
TWI539763B (en) * | 2014-09-26 | 2016-06-21 | 財團法人工業技術研究院 | Optical communication device and control method of the same |
EP3201893B1 (en) * | 2014-09-29 | 2020-12-23 | Koninklijke Philips N.V. | Remote control device, user device and system thereof, and method, computer program product |
EP3029380A1 (en) * | 2014-12-03 | 2016-06-08 | Electrolux Appliances Aktiebolag | Method for performing a treatment by a domestic appliance and for processing information of said treatment by a mobile computer device |
FR3030161B1 (en) * | 2014-12-16 | 2018-04-27 | Airbus Operations (S.A.S.) | AIRCRAFT COMMUNICATION SYSTEM |
US9432117B2 (en) | 2014-12-29 | 2016-08-30 | Industrial Technology Research Institute | Visible light communication apparatus and method of visible light communication |
US9237623B1 (en) | 2015-01-26 | 2016-01-12 | Ketra, Inc. | Illumination device and method for determining a maximum lumens that can be safely produced by the illumination device to achieve a target chromaticity |
US9485813B1 (en) | 2015-01-26 | 2016-11-01 | Ketra, Inc. | Illumination device and method for avoiding an over-power or over-current condition in a power converter |
US9237612B1 (en) | 2015-01-26 | 2016-01-12 | Ketra, Inc. | Illumination device and method for determining a target lumens that can be safely produced by an illumination device at a present temperature |
US9806810B2 (en) * | 2015-01-28 | 2017-10-31 | Abl Ip Holding Llc | Auto-discovery of neighbor relationships and lighting installation self-mapping via visual light communication |
CN107210815B (en) * | 2015-02-10 | 2020-07-31 | 布莱特编码技术有限公司 | System and method for providing optically encoded information |
EP3235349B1 (en) * | 2015-02-20 | 2021-08-18 | Siemens Mobility GmbH | Brightness control for a light signal system |
US9564027B2 (en) | 2015-03-24 | 2017-02-07 | Lenovo Enterprise Solutions (Singapore) Pte. Ltd. | Modulating brightness of optical element conveying human-discernible information to also convey machine-discernible information |
US9883351B2 (en) * | 2015-03-25 | 2018-01-30 | Shenzhen Institutes Of Advanced Technology Chinese Academy Of Sciences | Indoor positioning device and indoor positioning method |
US10070496B2 (en) | 2015-03-30 | 2018-09-04 | Mojo Labs, Inc. | Task to wall color control |
CN107535037B (en) * | 2015-04-20 | 2019-05-28 | 约翰·阿姆斯特朗 | The RFID reader with software radio powered by existing electrical system |
US9557022B2 (en) | 2015-04-30 | 2017-01-31 | Ever Venture Solutions, Inc. | Non-round retrofit recessed LED lighting fixture |
EP3295587B1 (en) | 2015-05-11 | 2020-05-13 | University Of South Florida | Information beamforming for visible light communication |
US10161568B2 (en) | 2015-06-01 | 2018-12-25 | Ilumisys, Inc. | LED-based light with canted outer walls |
CN105049117A (en) * | 2015-07-06 | 2015-11-11 | 成都弘毅天承科技有限公司 | Intelligent traffic system based on visible light communication |
US9642216B1 (en) * | 2015-08-11 | 2017-05-02 | Stack Labs, Inc. | Systems and methods for synchronizing lighting devices |
US20170048953A1 (en) | 2015-08-11 | 2017-02-16 | Federal Law Enforcement Development Services, Inc. | Programmable switch and system |
US10938182B2 (en) | 2015-08-19 | 2021-03-02 | Soraa Laser Diode, Inc. | Specialized integrated light source using a laser diode |
US10879673B2 (en) | 2015-08-19 | 2020-12-29 | Soraa Laser Diode, Inc. | Integrated white light source using a laser diode and a phosphor in a surface mount device package |
US11437775B2 (en) | 2015-08-19 | 2022-09-06 | Kyocera Sld Laser, Inc. | Integrated light source using a laser diode |
US11437774B2 (en) * | 2015-08-19 | 2022-09-06 | Kyocera Sld Laser, Inc. | High-luminous flux laser-based white light source |
JP6655810B2 (en) * | 2015-08-21 | 2020-02-26 | パナソニックIpマネジメント株式会社 | Lighting control system and lighting control device used therein |
US9559773B1 (en) * | 2015-09-01 | 2017-01-31 | Aleddra Inc. | Add-on VLC controller for LED lighting device |
KR101708210B1 (en) | 2015-09-22 | 2017-02-27 | 한국해양대학교 산학협력단 | Lighting Communication System Based Power Line Communication |
US9698908B2 (en) * | 2015-09-30 | 2017-07-04 | Osram Sylvania Inc. | Sub-sampling raster lines in rolling shutter mode for light-based communication |
EP3163160A1 (en) * | 2015-10-28 | 2017-05-03 | Sebastian Mayer | Image presentation device |
KR101683472B1 (en) * | 2015-12-08 | 2016-12-07 | 파워실리콘 (주) | Color lighting device for controlling color |
EP3395614A4 (en) * | 2015-12-22 | 2019-10-09 | Koito Manufacturing Co., Ltd. | Vehicle illumination device, vehicle and illumination control system |
KR20220062137A (en) | 2015-12-30 | 2022-05-13 | 아론 슈어파이어, 엘엘씨 | Optical narrowcasting |
CL2015003778A1 (en) * | 2015-12-30 | 2017-10-13 | Univ Santiago Chile | System and method of communication through visible light for underground tunnels. |
CN108496060B (en) * | 2016-01-14 | 2020-12-04 | 索尤若驱动有限及两合公司 | System comprising a first component and a second component |
DE102016102858A1 (en) * | 2016-02-18 | 2017-08-24 | Abb Ag | Arrangement for wireless data transmission in a house or building installation system |
AU2017279495B2 (en) * | 2016-06-10 | 2022-06-30 | Magic Leap, Inc. | Integrating point source for texture projecting bulb |
US10027410B2 (en) | 2016-06-23 | 2018-07-17 | Abl Ip Holding Llc | System and method using a gated retro-reflector for visible light uplink communication |
EP3476185B1 (en) * | 2016-06-27 | 2019-11-13 | Signify Holding B.V. | Emitting coded light from a multi-lamp luminaire |
DE102016111971A1 (en) * | 2016-06-30 | 2018-01-04 | Fresenius Medical Care Deutschland Gmbh | Dedicated remote control of several dialysis machines |
CN106211508B (en) * | 2016-07-20 | 2018-05-29 | 合肥联信电源有限公司 | Emergence lighting lamp control system based on DC circuit |
CN106230677A (en) * | 2016-07-27 | 2016-12-14 | 深圳前海弘稼科技有限公司 | Communication system under greenhouse and communication means |
DE102016117523A1 (en) | 2016-09-16 | 2018-03-22 | Osram Opto Semiconductors Gmbh | Optoelectronic component and method for operating an optoelectronic component |
US20180375576A1 (en) * | 2016-09-23 | 2018-12-27 | Osram Sylvania Inc. | Techniques for indoor navigation with emergency assistance via light-based communication |
JP6449830B2 (en) * | 2016-10-11 | 2019-01-09 | 日機装株式会社 | Test apparatus and light emitting device manufacturing method |
TW202347973A (en) * | 2016-10-27 | 2023-12-01 | 美商李爾登公司 | Systems and methods for distributing radioheads |
US10923954B2 (en) | 2016-11-03 | 2021-02-16 | Energous Corporation | Wireless power receiver with a synchronous rectifier |
US10539711B2 (en) * | 2016-11-10 | 2020-01-21 | Z Image, Llc | Laser beam detector including a light source for use in a laser attraction |
US10225013B2 (en) | 2016-12-01 | 2019-03-05 | Arris Enterprises Llc | Channel management to provide narrowcast data services using visible light communication |
EP3552325A4 (en) | 2016-12-06 | 2020-07-29 | LensVector Inc. | Liquid crystal beam control |
DE102016224613A1 (en) * | 2016-12-09 | 2018-06-14 | Siemens Aktiengesellschaft | Network connection of vehicles |
RU2645654C1 (en) * | 2017-01-11 | 2018-02-26 | Алексей Викторович Шторм | Device of led lamel with wireless data transmission |
GB201701209D0 (en) * | 2017-01-24 | 2017-03-08 | Purelifi Ltd | Optical wireless communication system |
DE102017102136A1 (en) | 2017-02-03 | 2018-08-09 | Osram Opto Semiconductors Gmbh | Optoelectronic lighting device and method for operating an optoelectronic lighting device |
KR101990372B1 (en) * | 2017-02-16 | 2019-06-20 | 빛생활연구소 주식회사 | Lighting system using wireless optical communication |
FR3064150B1 (en) * | 2017-03-20 | 2021-07-09 | Continental Automotive France | COMMUNICATION PROCESS BY LUMINOUS FLUX OF INFORMATION BETWEEN AT LEAST TWO STREET LAMPS AND NETWORK OF A CENTRAL CONTROL UNIT AND TWO STREET LAMPS |
US9866325B1 (en) * | 2017-03-28 | 2018-01-09 | Les Industries Show Canada Inc | System and method for bidirectional exchange of data with a mobile apparatus through at least one leaky optical fiber |
WO2018183892A1 (en) | 2017-03-30 | 2018-10-04 | Energous Corporation | Flat antennas having two or more resonant frequencies for use in wireless power transmission systems |
GB201706127D0 (en) * | 2017-04-18 | 2017-05-31 | Purelifi Ltd | Luminaire system for optical wireless communication |
RU2662384C1 (en) * | 2017-04-26 | 2018-07-25 | Алексей Викторович Шторм | Led screen with wireless data transfer bus (options) |
US11462949B2 (en) | 2017-05-16 | 2022-10-04 | Wireless electrical Grid LAN, WiGL Inc | Wireless charging method and system |
US10819436B2 (en) * | 2017-05-23 | 2020-10-27 | Mitsubishi Electric Corporation | Base station apparatus, ground station device, and ground antenna device |
DE102017209094A1 (en) | 2017-05-31 | 2018-12-06 | Osram Gmbh | WIRELESS TRANSMISSION OF DATA BETWEEN A COMMUNICATION TERMINAL POSITIONED IN A PRESENT AREA AND A COMMUNICATION OBJECT |
DE102017209103A1 (en) * | 2017-05-31 | 2018-12-06 | Osram Gmbh | PROVIDING A WIRELESS COMMUNICATION CONNECTION BETWEEN AT LEAST ONE COMMUNICATION TERMINAL POSITIONED IN A PREFERABABLE ROOM AREA AND A COMMUNICATION NETWORK |
US9853740B1 (en) | 2017-06-06 | 2017-12-26 | Surefire Llc | Adaptive communications focal plane array |
EP3639629A1 (en) * | 2017-06-13 | 2020-04-22 | Signify Holding B.V. | Led module for emitting signals |
GB201710545D0 (en) * | 2017-06-30 | 2017-08-16 | Purelifi Ltd | Optical wireless communication system and method |
AU2018298069B2 (en) * | 2017-07-03 | 2022-06-30 | Marsupial Holdings, Inc. | Light-based communications system |
JP6854964B2 (en) * | 2017-07-19 | 2021-04-07 | シグニファイ ホールディング ビー ヴィSignify Holding B.V. | Light irradiation system for communicating data |
US20190065789A1 (en) * | 2017-08-29 | 2019-02-28 | Motorola Solutions, Inc. | Device and method for power source based device authentication |
US11079077B2 (en) | 2017-08-31 | 2021-08-03 | Lynk Labs, Inc. | LED lighting system and installation methods |
FR3068849A1 (en) * | 2017-09-05 | 2019-01-11 | Orange | METHOD AND DEVICE FOR OPTICAL TRANSMISSION FOR BANK TRANSACTION |
US11333837B2 (en) * | 2017-09-07 | 2022-05-17 | Murata Machinery, Ltd. | Optical communication system for rail-guided truck |
KR102039083B1 (en) * | 2017-09-08 | 2019-10-31 | 주식회사 블랙라벨 | Internet of things hub communicating system using illumination device and internet of things hub communicating method |
IT201700101065A1 (en) * | 2017-09-08 | 2019-03-08 | Slux Sagl | DATA TRANSMISSION SYSTEM USING OPTICAL RADIATION USING DIFFUSION THROUGH CONVOGULATED WAVES AND ASSOCIATED METHOD |
EP3729689A1 (en) * | 2017-09-08 | 2020-10-28 | Slux Sagl | System for transmitting data by means of optical radiation by means of diffusion by power lines and associated method |
DE102017123715A1 (en) * | 2017-10-12 | 2019-04-18 | HELLA GmbH & Co. KGaA | Lighting device for a motor vehicle |
DE102017123720A1 (en) * | 2017-10-12 | 2019-04-18 | HELLA GmbH & Co. KGaA | Communication system for a motor vehicle |
US11342798B2 (en) | 2017-10-30 | 2022-05-24 | Energous Corporation | Systems and methods for managing coexistence of wireless-power signals and data signals operating in a same frequency band |
WO2019114952A1 (en) * | 2017-12-13 | 2019-06-20 | Osram Opto Semiconductors Gmbh | Luminaire and method for wireless data transfer using such a luminaire |
CN108242954B (en) * | 2017-12-14 | 2020-07-14 | 中国空间技术研究院 | Visible light communication system and method applied to spacecraft cabin data transmission |
US10236986B1 (en) | 2018-01-05 | 2019-03-19 | Aron Surefire, Llc | Systems and methods for tiling free space optical transmissions |
US10473439B2 (en) | 2018-01-05 | 2019-11-12 | Aron Surefire, Llc | Gaming systems and methods using optical narrowcasting |
US10250948B1 (en) | 2018-01-05 | 2019-04-02 | Aron Surefire, Llc | Social media with optical narrowcasting |
EP3759841A4 (en) | 2018-02-26 | 2021-12-01 | Lumeova, Inc | A free space optical communication apparatus |
WO2019173543A1 (en) * | 2018-03-06 | 2019-09-12 | Quarkstar Llc | Luminaire and lighting system providing directional light output |
WO2019206809A1 (en) * | 2018-04-24 | 2019-10-31 | Signify Holding B.V. | Systems and methods for free space optical communication using active beam steering |
US20210284608A1 (en) * | 2018-06-11 | 2021-09-16 | Basf Se | Optical data communication system comprising para-phenylenevinylenes and specific para-phenylenevinylenes |
FR3082687B1 (en) | 2018-06-18 | 2021-10-01 | Safran Nacelles | DEVICE AND METHOD FOR COMMUNICATION OF DATA IN AN AIRCRAFT SUB-ASSEMBLY |
US11272599B1 (en) | 2018-06-22 | 2022-03-08 | Lutron Technology Company Llc | Calibration procedure for a light-emitting diode light source |
JP7067315B2 (en) * | 2018-06-28 | 2022-05-16 | コニカミノルタ株式会社 | Image forming device |
CN109067472B (en) * | 2018-08-23 | 2021-09-07 | 东南大学 | Multicolor optical signal receiving method based on overlapping covering optical filter set |
US11191138B1 (en) * | 2018-09-19 | 2021-11-30 | Lumitec, Llc | Light control systems, methods, devices, and uses thereof |
US20200107422A1 (en) * | 2018-09-27 | 2020-04-02 | Lumileds Llc | Programmable light-emitting diode (led) lighting system and methods of operation |
WO2020109158A1 (en) * | 2018-11-29 | 2020-06-04 | Signify Holding B.V. | Power line communication power adaptor |
JP6836573B2 (en) * | 2018-11-29 | 2021-03-03 | コイト電工株式会社 | In-car communication system |
US11421843B2 (en) | 2018-12-21 | 2022-08-23 | Kyocera Sld Laser, Inc. | Fiber-delivered laser-induced dynamic light system |
US11239637B2 (en) | 2018-12-21 | 2022-02-01 | Kyocera Sld Laser, Inc. | Fiber delivered laser induced white light system |
US11884202B2 (en) | 2019-01-18 | 2024-01-30 | Kyocera Sld Laser, Inc. | Laser-based fiber-coupled white light system |
WO2020151462A1 (en) * | 2019-01-25 | 2020-07-30 | 欧普照明股份有限公司 | Method and system for adjusting beam angle of lamp, and lamp having adjustable beam angle |
KR20210117283A (en) | 2019-01-28 | 2021-09-28 | 에너저스 코포레이션 | Systems and methods for a small antenna for wireless power transmission |
CN113661660B (en) | 2019-02-06 | 2023-01-24 | 艾诺格思公司 | Method of estimating optimal phase, wireless power transmitting apparatus, and storage medium |
CA3129962A1 (en) | 2019-02-21 | 2020-08-27 | Dialight Corporation | Lifi network and associated method |
KR102031513B1 (en) * | 2019-02-22 | 2019-10-11 | 정원식 | The Amplifier Protection Apparatus of Broadcasting Line for Fire Hydrant |
US11128376B1 (en) * | 2019-02-22 | 2021-09-21 | Securus Technologies, Llc | Data communication with light in controlled environment facilities |
FR3094501B1 (en) * | 2019-03-29 | 2021-04-02 | Oledcomm | Lighting and communication system comprising a transmitter and a receiver of modulated light signals |
CN110261823B (en) * | 2019-05-24 | 2022-08-05 | 南京航空航天大学 | Visible light indoor communication positioning method and system based on single LED lamp |
EP3977644A1 (en) * | 2019-05-29 | 2022-04-06 | Sew-Eurodrive GmbH & Co. KG | System, in particular installation, having a mobile part and a holding part, which holds a screen |
JP3237794U (en) * | 2019-06-21 | 2022-06-08 | キョウセラ エスエルディー レイザー,インコーポレイテッド | High luminous flux laser based white light source |
US11177880B2 (en) | 2019-08-30 | 2021-11-16 | Textron Innovations Inc. | Cockpit and cabin LiFi power and data |
DE202019104854U1 (en) * | 2019-09-03 | 2020-12-07 | Zumtobel Lighting Gmbh | Continuous-row lighting system with data transmission function |
KR102325302B1 (en) * | 2019-09-04 | 2021-11-11 | 주식회사 에스아이웨어 | Explosion-proof LED Lamp |
RU197045U1 (en) * | 2019-09-06 | 2020-03-26 | федеральное государственное бюджетное образовательное учреждение высшего образования "Московский политехнический университет" (Московский Политех) | LIGHT-TRANSFER MODULE OF VLC TECHNOLOGY WIRELESS COMMUNICATION SYSTEM |
GB201912938D0 (en) * | 2019-09-09 | 2019-10-23 | Purelifi Ltd | an optical wireless communication system and method |
CN110649971A (en) * | 2019-09-29 | 2020-01-03 | 福州京东方光电科技有限公司 | Visible light generation and communication method and device and visible light communication system |
EP3800792B1 (en) * | 2019-10-02 | 2022-08-03 | Zumtobel Lighting GmbH | Communication adaptor for a light trunking system, light trunking system comprising at least two such communication adaptors, and method for communicating data over such a light trunking system |
CN112804025B (en) * | 2019-11-14 | 2024-02-20 | Oppo广东移动通信有限公司 | Electromagnetic shielding room and communication system |
US20230058596A1 (en) * | 2020-01-13 | 2023-02-23 | Signify Holding B.V. | Lifi power management |
CN111140795B (en) * | 2020-01-13 | 2023-12-05 | 中铁第四勘察设计院集团有限公司 | Intelligent adjustment street lamp and street lamp system |
US20230054439A1 (en) * | 2020-01-27 | 2023-02-23 | Shimadzu Corporation | Optical communication device |
WO2021152679A1 (en) * | 2020-01-27 | 2021-08-05 | 株式会社島津製作所 | Fiber branch structure for spatial optical communication and optical communication system provided with same |
EP4109784A4 (en) * | 2020-02-21 | 2023-04-26 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Visible light communication network |
US11005531B1 (en) * | 2020-04-13 | 2021-05-11 | Nxp B.V. | System and method for communicating over a single-wire transmission line |
US11133864B1 (en) * | 2020-04-24 | 2021-09-28 | Ciena Corporation | Measurement of crosstalk |
CN111756444B (en) * | 2020-06-28 | 2023-03-24 | 新疆大学 | Communication method of visible light communication transmitter based on switchable light beams |
CN112822360B (en) * | 2020-12-30 | 2022-05-13 | 西安电子科技大学 | Deep sea video shooting and wireless transmission integrated system |
CN113037379A (en) * | 2021-02-24 | 2021-06-25 | 中航光电科技股份有限公司 | Big wide angle wireless optical communication subassembly under water based on fisheye lens |
US11956021B1 (en) * | 2023-04-24 | 2024-04-09 | Wireless Photonics Llc | Communication system and method for cloud-assisted free-space optical backhaul |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5602668A (en) * | 1994-11-30 | 1997-02-11 | International Business Machines Corporation | Data communications and illuminated light on the same optical fiber |
US20020167701A1 (en) * | 2001-03-28 | 2002-11-14 | Shoji Hirata | Optical transmission apparatus employing an illumination light |
US20030043972A1 (en) * | 2001-08-29 | 2003-03-06 | Burnham Robert J. | Wireless entertainment system for a vehicle |
Family Cites Families (72)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5640334A (en) | 1979-09-11 | 1981-04-16 | Komatsu Ltd | Indoor information transmission system |
JPS5938253A (en) | 1982-08-27 | 1984-03-02 | Mitsubishi Rayon Co Ltd | Light-diffusing acrylic resin molding |
JPS5958406A (en) | 1982-09-29 | 1984-04-04 | Toshiba Electric Equip Corp | Optical fiber device |
JPS5986971A (en) | 1982-11-10 | 1984-05-19 | Canon Inc | Light remote controlling method and its receiving device |
GB2186457A (en) * | 1984-10-18 | 1987-08-12 | Gec Avionics | Optical communications |
GB2169464B (en) * | 1985-01-09 | 1988-09-21 | Stc Plc | Optical fibre transmission systems |
JPS6248139A (en) | 1985-08-27 | 1987-03-02 | Casio Comput Co Ltd | Data communication equipment |
JPS6248129A (en) | 1985-08-27 | 1987-03-02 | Osaki Electric Co Ltd | Signal carrying method |
JPS62173895A (en) | 1986-01-27 | 1987-07-30 | Pioneer Electronic Corp | Two-way remote control system |
JPS63187102A (en) | 1987-01-30 | 1988-08-02 | Nikon Corp | Pattern detector |
JPH087284B2 (en) | 1987-02-16 | 1996-01-29 | 株式会社フジクラ | Leaked optical fiber and its manufacturing method |
JPS63269106A (en) | 1987-04-28 | 1988-11-07 | Mitsubishi Rayon Co Ltd | Optical element made of plastic |
JPS63187102U (en) | 1987-05-18 | 1988-11-30 | ||
JPH01122220A (en) | 1987-11-05 | 1989-05-15 | Seiko Instr & Electron Ltd | Ceiling information transmission system |
JPH01176127A (en) * | 1987-12-28 | 1989-07-12 | Ncr Corp | Optical space communication system |
JPH02284533A (en) | 1989-04-25 | 1990-11-21 | Mitsubishi Electric Corp | Infrared remote controller |
US5239295A (en) * | 1990-04-16 | 1993-08-24 | Motorola, Inc. | Serial light interface which also functions as an ambient light detector |
JPH04131000A (en) | 1990-09-21 | 1992-05-01 | Komatsu Ltd | Traffic information system |
JP2848981B2 (en) * | 1991-03-27 | 1999-01-20 | 日本ビクター株式会社 | Relay device and relay system |
JPH05302006A (en) | 1991-07-04 | 1993-11-16 | Mitsubishi Rayon Co Ltd | Light-diffusing methacrylate resin |
JPH0562505A (en) | 1991-09-03 | 1993-03-12 | Stanley Electric Co Ltd | Indicator lamp |
DE4137032A1 (en) | 1991-11-11 | 1993-05-13 | Siemens Ag | Optical data transmitter to receiver - has external light source and internal reflector for reflecting partial light onto photodetector |
JP3119524B2 (en) * | 1992-04-02 | 2000-12-25 | 株式会社東芝 | Mobile monitoring device |
WO1994002997A1 (en) * | 1992-07-28 | 1994-02-03 | British Telecommunications Public Limited Company | Free space optical communication system |
US5424859A (en) * | 1992-09-24 | 1995-06-13 | Nippon Telegraph And Telephone Corp. | Transceiver for wireless in-building communication sytem |
JPH06325264A (en) | 1993-05-12 | 1994-11-25 | Toshiba Corp | Refuge guidance supporting system |
JP2556259B2 (en) | 1993-06-08 | 1996-11-20 | 村田機械株式会社 | Light receiving signal processor |
JPH07169572A (en) | 1993-08-11 | 1995-07-04 | Hitachi Lighting Ltd | Guide light lighting device |
JP3448088B2 (en) | 1993-12-24 | 2003-09-16 | 東日本旅客鉄道株式会社 | Obstacle detection system |
JPH0867203A (en) | 1994-08-29 | 1996-03-12 | Ono Denki Kk | Emergency lamp |
US5633629A (en) * | 1995-02-08 | 1997-05-27 | Hochstein; Peter A. | Traffic information system using light emitting diodes |
JPH08330077A (en) | 1995-03-31 | 1996-12-13 | Toshiba Lighting & Technol Corp | Emergency lighting device and emergency light |
JPH08299475A (en) | 1995-04-27 | 1996-11-19 | Toyo Commun Equip Co Ltd | Emergency exit guide system |
JPH0919084A (en) | 1995-06-30 | 1997-01-17 | Toshiba Lighting & Technol Corp | Emergency lighting circuit and emergency lighting apparatus |
JPH0944627A (en) | 1995-07-25 | 1997-02-14 | Toshiba Corp | Tunnel illumination controller |
JP3690852B2 (en) * | 1995-12-27 | 2005-08-31 | シャープ株式会社 | Surface-emitting display device |
JPH1066167A (en) | 1996-08-15 | 1998-03-06 | Sony Corp | Remote controller |
JPH10157621A (en) | 1996-11-27 | 1998-06-16 | Hitachi Ltd | Train radio operation support system |
US6441943B1 (en) * | 1997-04-02 | 2002-08-27 | Gentex Corporation | Indicators and illuminators using a semiconductor radiation emitter package |
US6548967B1 (en) | 1997-08-26 | 2003-04-15 | Color Kinetics, Inc. | Universal lighting network methods and systems |
JP3661912B2 (en) | 1997-09-12 | 2005-06-22 | 株式会社リコー | Optical access station and terminal device |
JPH11127170A (en) | 1997-10-23 | 1999-05-11 | Horiba Ltd | Communication method using fluorescent light and its communication equipment |
JPH11234210A (en) | 1997-12-11 | 1999-08-27 | Nippon Telegr & Teleph Corp <Ntt> | Optical wiring system |
JP2000081516A (en) | 1998-02-18 | 2000-03-21 | Hikariya Lighting:Kk | Optical fiber with light diffusion part and its production |
JPH11266190A (en) | 1998-03-17 | 1999-09-28 | Sekisui Chem Co Ltd | Electrical lamp communication transmitting and receiving device, and electrical lamp line communication device and method |
WO1999049446A1 (en) | 1998-03-20 | 1999-09-30 | Versitech Ltd. | Tricolor led display system having audio output |
US6400482B1 (en) * | 1998-04-15 | 2002-06-04 | Talking Lights, Llc | Communication system |
EP0967590A1 (en) | 1998-06-25 | 1999-12-29 | Hewlett-Packard Company | Optical display device using LEDs and its operating method |
JP2000067377A (en) * | 1998-08-25 | 2000-03-03 | Nippon Signal Co Ltd:The | Information transmitter-receiver |
JP2001052501A (en) | 1999-05-17 | 2001-02-23 | Sadao Momiyama | Bulb base type led electric decorative sign |
JP2001036592A (en) | 1999-07-21 | 2001-02-09 | Mitsubishi Electric Corp | Distribution line carrier system and its terminal |
JP2001176678A (en) * | 1999-12-21 | 2001-06-29 | Japan Storage Battery Co Ltd | Lighting device |
CA2299559A1 (en) * | 2000-02-23 | 2001-08-23 | Oneline Ag | A power line communications system |
JP2001243807A (en) | 2000-02-28 | 2001-09-07 | Mitsubishi Electric Lighting Corp | Led electric bulb |
JP2001292107A (en) * | 2000-04-06 | 2001-10-19 | Sony Corp | Reception device, transmission device and communication system |
JP4770058B2 (en) | 2000-05-17 | 2011-09-07 | 日亜化学工業株式会社 | LIGHT EMITTING ELEMENT AND DEVICE |
EP1323288A4 (en) * | 2000-08-14 | 2007-03-21 | Main Net Comm Ltd | Power line communication system |
JP2002148442A (en) | 2000-11-14 | 2002-05-22 | Nichia Chem Ind Ltd | Light emitting device |
JP2002144984A (en) | 2000-11-17 | 2002-05-22 | Matsushita Electric Ind Co Ltd | On-vehicle electronic apparatus |
JP2002190776A (en) | 2000-12-20 | 2002-07-05 | Showa Electric Wire & Cable Co Ltd | Optical data transmission system |
JP4574878B2 (en) | 2001-03-12 | 2010-11-04 | オリンパス株式会社 | Light scattering glass material |
JP2002344478A (en) | 2001-05-18 | 2002-11-29 | Mitsubishi Electric Corp | Network connection system in train |
JP3465017B2 (en) | 2002-04-23 | 2003-11-10 | 学校法人慶應義塾 | Illumination light transmitting device, illumination light receiving device, and phosphor type illumination light communication system |
JP3922560B2 (en) | 2002-12-04 | 2007-05-30 | 株式会社中川研究所 | Emergency light and emergency light wireless data transmission system |
JP4450303B2 (en) | 2003-03-14 | 2010-04-14 | 株式会社中川研究所 | Illumination light communication device and illumination element |
JP2004297295A (en) | 2003-03-26 | 2004-10-21 | Global Com:Kk | Illumination light communication system, illuminator, and illumination light source |
JP2004229273A (en) | 2003-09-16 | 2004-08-12 | Global Com:Kk | Communication method using illumination light |
JP2004221747A (en) | 2003-01-10 | 2004-08-05 | Global Com:Kk | Illuminating light communication system |
JP4007159B2 (en) | 2002-10-30 | 2007-11-14 | 株式会社ジェイテクト | Electric power steering device and joint |
JP2004265774A (en) | 2003-03-03 | 2004-09-24 | Matsushita Electric Works Ltd | Illumination system |
JP4057468B2 (en) | 2003-06-03 | 2008-03-05 | シャープ株式会社 | Illumination device with light transmission mechanism |
WO2008050729A1 (en) * | 2006-10-23 | 2008-05-02 | Panasonic Corporation | Optical space transmission system using visible light and infrared light |
-
2003
- 2003-10-23 DE DE60316178T patent/DE60316178T2/en not_active Expired - Lifetime
- 2003-10-23 EP EP07017127A patent/EP1858179A1/en not_active Withdrawn
- 2003-10-23 EP EP07017125A patent/EP1860800A1/en not_active Withdrawn
- 2003-10-23 EP EP07016825A patent/EP1855398B1/en not_active Expired - Fee Related
- 2003-10-23 AU AU2003275606A patent/AU2003275606A1/en not_active Abandoned
- 2003-10-23 EP EP07017122A patent/EP1860799A1/en not_active Withdrawn
- 2003-10-23 DE DE60331271T patent/DE60331271D1/en not_active Expired - Lifetime
- 2003-10-23 EP EP07017124A patent/EP1863203A1/en not_active Withdrawn
- 2003-10-23 DE DE60336770T patent/DE60336770D1/en not_active Expired - Lifetime
- 2003-10-23 AT AT03758809T patent/ATE372614T1/en not_active IP Right Cessation
- 2003-10-23 EP EP03758809A patent/EP1564914B1/en not_active Expired - Lifetime
- 2003-10-23 EP EP07017126A patent/EP1860801A1/en not_active Withdrawn
- 2003-10-23 EP EP07017123A patent/EP1865631B1/en not_active Expired - Fee Related
- 2003-10-23 CN CN200910179120A patent/CN101714898A/en active Pending
- 2003-10-23 WO PCT/JP2003/013539 patent/WO2004038962A1/en active IP Right Grant
- 2003-10-23 KR KR1020057007071A patent/KR100970034B1/en active IP Right Grant
- 2003-10-23 US US10/532,250 patent/US7583901B2/en not_active Expired - Fee Related
-
2006
- 2006-07-14 HK HK06107882.0A patent/HK1087848A1/en not_active IP Right Cessation
-
2009
- 2009-07-20 HK HK09106578.8A patent/HK1129164A1/en not_active IP Right Cessation
- 2009-08-05 US US12/461,223 patent/US20090297167A1/en not_active Abandoned
- 2009-08-05 US US12/461,226 patent/US20090297156A1/en not_active Abandoned
- 2009-08-05 US US12/461,229 patent/US7929867B2/en not_active Expired - Fee Related
- 2009-08-05 US US12/461,227 patent/US20090297166A1/en not_active Abandoned
- 2009-08-05 US US12/461,225 patent/US20090310976A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5602668A (en) * | 1994-11-30 | 1997-02-11 | International Business Machines Corporation | Data communications and illuminated light on the same optical fiber |
US20020167701A1 (en) * | 2001-03-28 | 2002-11-14 | Shoji Hirata | Optical transmission apparatus employing an illumination light |
US20030043972A1 (en) * | 2001-08-29 | 2003-03-06 | Burnham Robert J. | Wireless entertainment system for a vehicle |
Cited By (94)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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US8811826B2 (en) | 2007-09-11 | 2014-08-19 | Siemens Aktiengesellschaft | Data transmission with room illuminations having light emitting diodes |
US20100254714A1 (en) * | 2007-09-11 | 2010-10-07 | Oscar Cristobal Gaete Jamett | Data transmission with room illuminations having light emitting diodes |
US20120195598A1 (en) * | 2009-09-01 | 2012-08-02 | University Court Of The Univerity Of St Andrews | Communication system |
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US8792790B2 (en) * | 2009-09-19 | 2014-07-29 | Samsung Electronics Co., Ltd | Apparatus and method for supporting mobility of a mobile terminal that performs visible light communication |
US20120008959A1 (en) * | 2009-09-19 | 2012-01-12 | Samsung Electronics Co., Ltd. | Apparatus and method for supporting mobility of a mobile terminal that performs visible light communication |
US20110293286A1 (en) * | 2010-05-25 | 2011-12-01 | Leddynamics, Inc. | Method for optical data transmission using existing indicator or illumination lamp |
US20110305460A1 (en) * | 2010-06-14 | 2011-12-15 | Snyder Mark W | Portable light providing illumination and data |
US8494374B2 (en) * | 2010-06-14 | 2013-07-23 | Streamlight, Inc. | Portable light providing illumination and data |
US9374160B2 (en) * | 2011-03-08 | 2016-06-21 | Samsung Electronics Co., Ltd. | Wireless network system, wireless device, and network registration method of the wireless device |
US9838122B2 (en) * | 2011-03-08 | 2017-12-05 | Samsung Electronics Co., Ltd. | Wireless network system, wireless device, and network registration method of the wireless device |
US10075241B2 (en) | 2011-03-08 | 2018-09-11 | Samsung Electronics Co., Ltd. | Wireless network system, wireless device, and network registration method of the wireless device |
US20150195036A1 (en) * | 2011-03-08 | 2015-07-09 | Samsung Electronics Co., Ltd. | Wireless network system, wireless device, and network registration method of the wireless device |
US20140050487A1 (en) * | 2011-04-26 | 2014-02-20 | Huawei Technologies Co., Ltd. | Wireless communication method, base station and system |
US9461739B2 (en) * | 2011-04-26 | 2016-10-04 | Huawei Technologies Co., Ltd. | Wireless communication method, base station and system |
US20120321321A1 (en) * | 2011-06-14 | 2012-12-20 | Scott Riesebosch | Methods of communication utilizing an led lamp |
US20150139660A1 (en) * | 2011-07-12 | 2015-05-21 | Samsung Electronics Co., Ltd. | Method of visible light communication using illuminance sensor and mobile communication terminal for the same |
US9276677B2 (en) * | 2011-07-12 | 2016-03-01 | Samsung Electronics Co., Ltd. | Method of visible light communication using illuminance sensor and mobile communication terminal for the same |
US20190182923A1 (en) * | 2011-10-07 | 2019-06-13 | Environmental Light Technologies Corporation | Wavelength Sensing Lighting System and Associated Methods |
US10462874B2 (en) * | 2011-10-07 | 2019-10-29 | Environmental Light Technologies Corporation | Wavelength sensing lighting system and associated methods |
US8492995B2 (en) | 2011-10-07 | 2013-07-23 | Environmental Light Technologies Corp. | Wavelength sensing lighting system and associated methods |
US20160183343A1 (en) * | 2011-11-21 | 2016-06-23 | Environmental Light Technologies Corp. | Wavelength sensing lighting system and associated methods |
US8818202B2 (en) | 2011-11-21 | 2014-08-26 | Environmental Light Technologies Corp. | Wavelength sensing lighting system and associated methods for national security application |
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US8515289B2 (en) * | 2011-11-21 | 2013-08-20 | Environmental Light Technologies Corp. | Wavelength sensing lighting system and associated methods for national security application |
US20170142804A1 (en) * | 2011-11-21 | 2017-05-18 | Environmental Light Technologies Corporation | Wavelength sensing lighting system and associated methods |
US9839092B2 (en) * | 2011-11-21 | 2017-12-05 | Environmental Light Technologies Corporation | Wavelength sensing lighting system and associated methods |
US10212781B2 (en) * | 2011-11-21 | 2019-02-19 | Environmental Light Technologies Corporation | Wavelength sensing lighting system and associated methods |
US9125275B2 (en) | 2011-11-21 | 2015-09-01 | Environmental Light Technologies Corp | Wavelength sensing lighting system and associated methods |
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US9578710B2 (en) * | 2011-11-21 | 2017-02-21 | Environmental Light Technologies Corporation | Wavelength sensing lighting system and associated methods |
US20130266325A1 (en) * | 2012-04-10 | 2013-10-10 | Disney Enterprises, Inc. | Visible light communication with flickering prevention |
US8873965B2 (en) * | 2012-04-10 | 2014-10-28 | Disney Enterprises, Inc. | Visible light communication with flickering prevention |
US8680457B2 (en) | 2012-05-07 | 2014-03-25 | Lighting Science Group Corporation | Motion detection system and associated methods having at least one LED of second set of LEDs to vary its voltage |
US10218914B2 (en) | 2012-12-20 | 2019-02-26 | Panasonic Intellectual Property Corporation Of America | Information communication apparatus, method and recording medium using switchable normal mode and visible light communication mode |
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US9705594B2 (en) * | 2013-03-15 | 2017-07-11 | Cree, Inc. | Optical communication for solid-state light sources |
US20140270793A1 (en) * | 2013-03-15 | 2014-09-18 | Cree, Inc. | Optical communication for solid-state light sources |
US9264138B2 (en) | 2013-05-16 | 2016-02-16 | Disney Enterprises, Inc. | Reliable visibile light communication with dark light synchronization |
US9791727B2 (en) | 2014-02-19 | 2017-10-17 | Panasonic Intellectual Property Corporation Of America | Transmitter, transmitting method, and receiving method |
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US10507063B2 (en) * | 2014-11-21 | 2019-12-17 | Think Surgical, Inc. | Visible light communication system for transmitting data between visual tracking systems and tracking markers |
US10180239B2 (en) * | 2015-03-27 | 2019-01-15 | Orange | Combined illumination and optical communication device |
US20160281963A1 (en) * | 2015-03-27 | 2016-09-29 | Orange | Combined illumination and optical communication device |
US9713234B2 (en) | 2015-04-10 | 2017-07-18 | Panasonic Intellectual Property Management Co., Ltd. | Lighting fixture, lighting system, and method performed by the lighting fixture |
US9960847B2 (en) | 2015-09-10 | 2018-05-01 | Panasonic Intellectual Property Management Co., Ltd. | Information presenting method, server, and information presenting system |
US10461861B2 (en) * | 2015-12-31 | 2019-10-29 | Garmin Switzerland Gmbh | Photovoltaic receiver optimised for communication by coded light |
US10830399B2 (en) * | 2016-11-29 | 2020-11-10 | Orange | Device for lighting and optical communication combined with viewing of the communication field |
US20190376653A1 (en) * | 2016-11-29 | 2019-12-12 | Orange | Device for lighting and optical communication combined with viewing of the communication field |
US11282823B2 (en) * | 2017-10-18 | 2022-03-22 | Osram Oled Gmbh | Semiconductor device |
Also Published As
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US20060056855A1 (en) | 2006-03-16 |
HK1129164A1 (en) | 2009-11-20 |
US20090297167A1 (en) | 2009-12-03 |
EP1855398B1 (en) | 2010-02-10 |
EP1860800A1 (en) | 2007-11-28 |
DE60336770D1 (en) | 2011-05-26 |
EP1564914A4 (en) | 2006-01-25 |
US7929867B2 (en) | 2011-04-19 |
EP1865631A1 (en) | 2007-12-12 |
US20090310976A1 (en) | 2009-12-17 |
WO2004038962A1 (en) | 2004-05-06 |
AU2003275606A1 (en) | 2004-05-13 |
EP1564914B1 (en) | 2007-09-05 |
EP1858179A1 (en) | 2007-11-21 |
EP1863203A1 (en) | 2007-12-05 |
EP1860799A1 (en) | 2007-11-28 |
CN101714898A (en) | 2010-05-26 |
US20090297156A1 (en) | 2009-12-03 |
EP1855398A1 (en) | 2007-11-14 |
KR100970034B1 (en) | 2010-07-16 |
DE60316178T2 (en) | 2008-06-05 |
KR20050071617A (en) | 2005-07-07 |
DE60316178D1 (en) | 2007-10-18 |
DE60331271D1 (en) | 2010-03-25 |
EP1865631B1 (en) | 2011-04-13 |
US20090297157A1 (en) | 2009-12-03 |
HK1087848A1 (en) | 2006-10-20 |
US7583901B2 (en) | 2009-09-01 |
ATE372614T1 (en) | 2007-09-15 |
EP1564914A1 (en) | 2005-08-17 |
EP1860801A1 (en) | 2007-11-28 |
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