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810 results about "Wavelength converters" patented technology
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White light emitting device comprising a plurality of light emitting diodes with different peak emission wavelengths and a wavelength converter
ActiveUS8071988B2Improve emission efficiencySolid-state devicesSemiconductor/solid-state device manufacturingEffect lightUltraviolet
Disclosed herein is a light emitting device including one or more light emitting diodes to primarily emit light having different wavelengths in the wavelength range of ultraviolet rays and / or blue light, and a wavelength-conversion means to convert the primary light into secondary light in the visible light wavelength range. The light emitting device of the current invention has a high color temperature of 2000 to 8000 K or 10000 K and a high color rendering index of 90 or more, thus easily realizing desired emission on the color coordinate system. Therefore, the lighting emitting device is applicable to mobile phones, notebook computers, and keypads or backlight units for various electronic products, and, in particular, automobiles and exterior and interior lighting fixtures.
Owner:SEOUL SEMICONDUCTOR
Wavelength Converter, Light-Emitting Device, Method of Producing Wavelength Converter and Method of Producing Light-Emitting Device
InactiveUS20080231170A1Reduce self-quenchingSolve low luminous efficiencyDischarge tube luminescnet screensLamp detailsPhosphorFluorescence
A light-emitting device comprises a light-emitting element 3 that is provided on a substrate 2 and emits excitation light, and a wavelength converter 4 that converts the excitation light into visible light. The visible light is output light. The wavelength converter 4 comprises a plurality of wavelength conversion layers 4a, 4b and 4c which respectively contain, as phosphors, at least one type of semiconductor ultrafine particles having a mean particle size of not more than 20 nm and at least one type of fluorescent substance having a mean particle size of not less than 0.1 μm in a resin matrix. Thereby, self-quenching of phosphors is reduced and high luminous efficiency is attained.
Owner:KYOCERA CORP
Quantum dot-wavelength converter, manufacturing method of the same and light emitting device including the same
InactiveUS20100051898A1Improve emission effectSolid-state devicesSemiconductor/solid-state device manufacturingQuantum dotLength wave
There is provided a quantum dot wavelength converter including a quantum dot, which is optically stable without any change in an emission wavelength and improved in emission capability. The quantum dot wavelength converter includes: a wavelength converting part including a quantum dot wavelength-converting excitation light and generating a wavelength-converted light and a dispersive medium dispersing the quantum dot; and a sealer sealing the wavelength converting part.
Owner:SAMSUNG ELECTRONICS CO LTD
Polarized head-mounted projection display
An image display system and associated method for image displaying The system includes an image source configured to generate image light, projection optics configured to project the image light, and a polarizing beam splitter optically coupled to the projection optics and configured to propagate into a first optical path first polarized light having a first polarization and to propagate into a second optical path second polarized light having a second polarization The system includes a quarter wave converter disposed in the first optical path and configured to rotate the first polarization by a quarter phase as the first polarized light first passes through the quarter wave converter, and includes a reflective screen disposed in the first optical path and configured to reflect rotated first polarized light from the quarter wave converter back through the quarter wave converter for further quarter phase rotation.
Owner:THE ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIV OF ARIZONA
Light assembly for remote visual inspection apparatus
An apparatus for use as a light assembly in remote visual inspection devices is provided. The light assembly may consist of a laser diode coupled to a fiber optic bundle that transmits collimated laser light onto a wavelength converter located in the distal end of the remote video inspection system. Wavelength converters consisting of phosphorescent materials can be used to convert collimated laser light into white light for inspection illumination purposes.
Owner:GE INSPECTION TECH LP
Exposure apparatus with laser device
InactiveUS6901090B1Improve maintainabilityEasy alignmentLaser detailsPhotomechanical exposure apparatusFiber bundleAudio power amplifier
An exposure apparatus has a laser device that is small, easy to maintain, and capable of producing an output that is unlikely to be affected by optical surges occurring in the beginning of operation. A single-wavelength laser oscillator (11) supplies a laser beam (LB1) to a fiber optic amplifier (13) through an optical modulator (12). The amplified laser beam is split by splitters (14, 16-1 to 16-m), amplified by optical amplifier units (18-1 to 18-n) and supplied through a fiber bundle (19) to a wavelength converter (20), which in turn converts the split beams into ultraviolet laser radiation (LB5) for use as exposure light. The optical modulator (12) outputs light pulses during the generation of ultraviolet light. The optical modulator (12) also produces laser radiation during the absence of ultraviolet light, but the laser radiation has substantially the same average output and a considerably low peak compared with that during the generation of ultraviolet light.
Owner:NIKON CORP
Flat panel display and backlight module thereof
InactiveUS20090231831A1Inhibition effectUniform lightIlluminated signsSpectral modifiersDisplay deviceLength wave
The invention is related to a flat panel display and a backlight module thereof. The backlight module comprises a light source and a plurality of wavelength converters. The light source formed by some arranged luminous elements would radially emit light with an optical wavelength individually. These wavelength converters are near the light source and convert the light with the wavelength. The converted light with another wavelength is radially emitted, in which a portion of the converted light with another wavelength is emitted outward directly from the wavelength converter, while the other portion thereof is emitted from the wavelength converter toward the other wavelength converters.
Owner:KISMART
Surface plasmon wavelength converter
InactiveUS20100126566A1Light demodulationPhotovoltaic energy generationSurface plasmonElectromagnetic radiation
A surface plasmon wavelength converter device includes a metallic film which has a plurality of nanofeatures. A wavelength conversion layer having a plurality of centers is disposed adjacent to the metallic film. The surface plasmon wavelength converter device is configured to respond to an incident electromagnetic radiation having a first wavelength by radiating away from the surface plasmon wavelength converter device an electromagnetic radiation having a second wavelength. A surface plasmon wavelength converter device having a metallic film and at least one center disposed in at least one of a plurality of nanofeatures of the metallic film is also described. A surface plasmon wavelength converter device having a transparent conductive oxide (TCO) film having a plurality of metallic nanofeatures, adjacent to a wavelength conversion layer, and a TCO film having a plurality of metallic nanofeatures with at least one center disposed therein is also described.
Owner:LIGHTWAVE POWER
Wavelength converter and two-dimensional image display device
A wavelength converter of the present invention is provided with a laser resonator including a fiber containing an laser-active material and a fiber grating formed in the fiber, a laser light source for emitting an excitation light to the fiber, and a wavelength conversion element for converting a fundamental wave of a laser beam emitted from the laser resonator into a harmonic, wherein the fiber is coiled and has the outer side thereof coated with a heat radiating member having a reflection surface for reflecting light having a wavelength of an excitation light. The wavelength converter is designed to prevent an efficiency reduction caused by the heat generation of a rare-earth doped fiber in a wavelength converter.
Owner:PANASONIC CORP
Light source device and endoscope apparatus comprising the same
A light source device includes a first semiconductor light source, a second semiconductor light source, and a wavelength converter. The first semiconductor light source emits light in a first wavelength range. The second semiconductor light source emits light in a second wavelength range different from the first wavelength range. The wavelength converter absorbs the light in the first wavelength range to emit light in a third wavelength range different from either of the first wavelength range and the second wavelength range, and transmits the light in the second wavelength range substantially entirely.
Owner:OLYMPUS CORP
Routing, wavelength assignment, and spectrum allocation in wavelength convertible flexible optical wavelength-division multiplexing networks
ActiveUS20120201541A1MiniaturizationWavelength-division multiplex systemsElectromagnetic transmissionMultiplexingFrequency spectrum
There is provided a method in a wavelength convertible flexible optical wavelength-division multiplexing (WC-FWDM) network. The network has a plurality of optical nodes interconnected by a plurality of optical fibers. The network is for providing an overall spectrum divisible into a set of consecutive wavelength slots. At least one optical node has at least one wavelength converter for wavelength conversion. The method includes determining a channel route through the network commencing at a source node and ceasing at a destination node. The determined channel route is selectively tunable responsive to selected ones of a plurality of routing methods. The routing methods are so selected responsive to a routing policy having one or more objectives of minimization of channel blocking, minimization of a number of wavelength converters used in the network, and minimization of physical distance traversed by a channel, and minimization of operating wavelengths of a channel.
Owner:NEC CORP
Light emitting diode package
A light emitting diode package includes a light emitting diode device disposed in the light emitting diode package, and a molding material covering the light emitting diode device. The molding material includes a plurality of scatter supported wavelength converters. Portions of light beams emitted from the light emitting diode device incident to each of the scatter supported wavelength converters are scattered by each of the scatter supported wavelength converters and absorbed to excite each of the scatter supported wavelength converters to emit light in another wavelength.
Owner:LEXTAR ELECTRONICS CORP
High colour quality luminaire
InactiveUS20120038280A1Low costUniform chromaticity propertyLight source combinationsElectroluminescent light sourcesSemiconductor materialsEffect light
A colour tunable lighting module is described which includes at least three solid state lighting emitters (such as light emitting diodes) and at least two wavelength converting elements (such as phosphors). The three solid state lighting emitters are formed of the same semiconductor material system and the light generated by them has dominant wavelengths in the blue-green-orange range of the optical spectrum. The two wavelengths converters are used re-emit some of the light from two of the emitters in broader spectra having longer dominant wavelengths, while the third emitter is selected to emit light at a wavelength between the dominant wavelengths of the light from the two emitters and the two converters. A control system may be employed to monitor and control the module and the lighting module can be optimised for tunable high colour quality white light applications.
Owner:PHOTONSTAR LED
Illumination device, projector, and illumination method
ActiveUS20150253653A1Simplifying phosphorPoint-like light sourceProjectorsLength waveFluorescent light
An illumination device includes an excitation light source which emits excitation light, a wavelength converter which generates fluorescent light having a wavelength different from that of the excitation light through the excitation of the excitation light and a light path-splitting member including a first filter and a second filter arranged to alternately come across a light path of the excitation light, wherein the first filter reflects one of the excitation light and the fluorescent light and transmits the other of the excitation light and the fluorescent light, the second filter transmits light reflected by the first filter and reflects light transmitted through the first filter, and the wavelength converter is disposed in a reflection light path or a transmission light path of the excitation light.
Owner:RICOH KK
Light emitting diode with bonded semiconductor wavelength converter
InactiveUS20100283074A1Reduce edge-leakageSolid-state devicesSemiconductor/solid-state device manufacturingLength waveLight-emitting diode
A light emitting diode (LED) has various LED layers provided on a substrate. A multilayer semiconductor wavelength converter, capable of converting the wavelength of light generated in the LED to light at a longer wavelength, is attached to the upper surface of the LED by a bonding layer. One or more textured surfaces within the LED are used to enhance the efficiency at which light is transported from the LED to the wavelength converter. In some embodiments, one or more surfaces of the wavelength converter is provided with a textured surface to enhance the extraction efficiency of the long wavelength light generated within the converter.
Owner:3M INNOVATIVE PROPERTIES CO
Semiconductor light-emitting device
InactiveUS20050057144A1Discharge tube luminescnet screensLamp detailsWavelengthLight emitting device
A semiconductor light-emitting device can serve as a high-brightness light source with less tone variation. A reflective frame having a conical recess can be provided on a substrate. An LED chip can be mounted on the bottom in the reflective frame. A wavelength converter material is preferably filled in the recess to seal the LED chip. The wavelength converter material can include a fluorescent material and a 20-80 wt. % diffuser mixed in an optically transmissive resin.
Owner:STANLEY ELECTRIC CO LTD
All-optical mach-zehnder wavelength converter with monolithically integrated laser
InactiveUS6208454B1Reduce carrier densityExpand the scope of operationLaser detailsLaser optical resonator constructionAudio power amplifierLength wave
A wavelength converter incorporating an on-chip integrated laser for use in an optical system. The converter includes a first port for receiving an optical input signal such as a WDM signal and providing it to an interferometer, and an output port for outputting a signal which is a wavelength-converted version of the input signal. An optical source or laser is fabricated on the chip substrate on which the interferometer is formed for providing operating power to the interferometer. Power levels of the input signal are maintained by adjusting an on-chip semiconductor optical amplifier that receives the optical input signal and provides the amplified signal to the interferometer. In an alternative embodiment, the on-chip optical source is replaced by an on-chip pre-amplifier for an external laser source.
Owner:AVAGO TECH WIRELESS IP SINGAPORE PTE +2
Quantum dot-wavelength converter, manufacturing method of the same and light emitting device including the same
InactiveUS20110240960A1Improve emission effectSolid-state devicesSemiconductor laser optical deviceQuantum dotLength wave
There is provided a quantum dot wavelength converter including a quantum dot, which is optically stable without any change in an emission wavelength and improved in emission capability. The quantum dot wavelength converter includes: a wavelength converting part including a quantum dot wavelength-converting excitation light and generating a wavelength-converted light and a dispersive medium dispersing the quantum dot; and a sealer sealing the wavelength converting part.
Owner:SAMSUNG ELECTRONICS CO LTD
One-dimensional illumination apparatus and imaging apparatus
InactiveUS7545837B2High in output and efficiencyReduce speckle noiseSemiconductor laser arrangementsPicture reproducers using projection devicesNonlinear optical crystalLight equipment
Owner:SONY CORP
Method and apparatus for protecting optical signals within a wavelength division multiplexed environment
A system and method are provided for protecting optical signals within a wavelength division multiplexed (WDM) environment. The system and method utilize a single “protection” wavelength translator device to protect up to N wavelengths. The system and method utilize N+1 wavelength translator devices in order to provide protected transport for N wavelengths.
Owner:TELLABS OPERATIONS
Wavelength-converting phosphors for enhancing the efficiency of a photovoltaic device
InactiveUS20070295383A1Reducing scattering lossReducing scattering lossesPV power plantsLuminescent compositionsHigh energyScattering loss
The present embodiments are directed to photovoltaic devices that convert sunlight into electrical energy. More specifically, the present embodiments include a phosphor-containing, wavelength-converting material for shifting higher energy light to a lower energy form, the latter being more suitable for the typical solar cell to convert to electricity. The absorption of the phosphor may range from about 280 to 460 nm. Advantageously, the phosphor component of the wavelength converter may be in the form of nano-particles embedded in a transparent matrix for reducing scattering losses.
Owner:INTEMATIX
High colour quality luminaire
InactiveUS8783901B2Low costWell defined chromaticity propertyLight source combinationsLighting support devicesSemiconductor materialsEffect light
Owner:PHOTONSTAR LED
Wavelength converter and light-emitting device
InactiveCN102853377AAffect the service lifeLower operating temperatureLighting heating/cooling arrangementsGas-tight/water-tight arrangementsColor wheelLight emitting device
The embodiment of the invention discloses a wavelength converter and a light-emitting device. The wavelength converter comprises a wavelength conversion layer for receiving exciting light and producing excited light, a driving device for driving the wavelength conversion layer to make periodical motion, a box for sealing the wavelength conversion layer and the driving device and comprising a first area for transmitting the exciting light to the wavelength conversion layer and a second area for transmitting the excited light, (and) an external fan arranged outside the box and used for cooling the box, and / or an external radiator arranged on the external surface of the box. According to the embodiment of the invention, the dustproof and radiating of a color wheel in the prior art are realized.
Owner:APPOTRONICS CORP LTD
Light emitting device, and illumination apparatus and luminaire using same
InactiveUS20130235555A1Light source combinationsPoint-like light sourceLength waveLight-emitting diode
A light emitting device including multiple kinds of light emission units with different emission colors; a driver which drives the light emission units; and a cover member which is commonly provided for the multiple kinds of light emission units. The multiple kinds of light emission units include solid state light emitting elements of the same kind, and wavelength converters which cover the solid state light emitting elements, respectively, and convert wavelengths of lights emitted from the solid state light emitting elements into different wavelengths from each other. Further, the cover member contains a correction phosphor for correcting a chromaticity of light obtained by mixing lights emitted from the light emission units, to a predetermined chromaticity.
Owner:PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
Display device using semiconductor light emitting device
ActiveUS20160190105A1Long distanceFast response timeElectroluminescent light sourcesSolid-state devicesElectrical conductorDisplay device
A display device according to an embodiment of the present disclosure may include a lower substrate disposed with a line electrode at an upper portion thereof, a plurality of semiconductor light emitting devices electrically connected to the line electrode to generate light, a wavelength converter disposed on the semiconductor light emitting device to convert a wavelength of light generated from the semiconductor light emitting device, and a conductive adhesive layer comprising conductors configured to electrically connect the lower substrate to the semiconductor light emitting device and a body configured to surround the conductors, wherein the semiconductor light emitting device has a composition formula of InxAlyGa1-x-yN (0≦x≦1, 0≦y≦1, 0≦x+y≦1).
Owner:LG ELECTRONICS INC
Wavelength Converter, Lighting System, and Lighting System Assembly
InactiveUS20070096128A1Improve securityHigh color propertySolid-state devicesLuminescent compositionsSemiconductor materialsIndium
In a wavelength converter converting a wavelength of light emitted from a light source and outputting an output light containing light whose wavelength is converted, which comprises a fluorescent substance dispersed in a transparent matrix, the fluorescent substance has semiconductor fine particles containing at least one univalent metal element selected from alkali metal and Ag, an element of group III in the periodic table selected from indium and gallium, and sulfur, and does not substantially contain Cd and Se. Hence, a wavelength converter having a conversion efficiency of equal to or more than that of a converter containing CdSe can be provided by using a semiconductor material formed of a highly safe composition.
Owner:KYOCERA CORP
Variable color light emitting device and method for controlling the same
InactiveCN101268554AIncrease radiation areaLess expensiveSolid-state devicesSemiconductor devicesWavelengthLight emitting device
The present invention relates to a variable color light emitting device (10) comprising a light emitting diode (12) for emitting light, which diode in turn comprises a plurality of electrically conducting layers (14, 16, 18) , at least one of which being such that lateral current spreading in the diode is limited to form at least two independently electrically addressable segments (36) , for allowing illumination of an optional number of the segments. At least one of the number of segments is provided with a wavelength converter (34) adapted to convert at least part of the light emitted from its associated segment to generate light of a certain primary color. The invention also relates to systems incorporating at least one such light emitting device and a method for controlling such a light emitting device.
Owner:KONINKLIJKE PHILIPS ELECTRONICS NV
Rare earth doped luminescent glass
InactiveUS20050253113A1Reduce maximum phonon energyLow on OH−Other chemical processesGas discharge lamp usageAlkaline earth metalAlkali metal oxide
A white cold light source uses an LED or a gas discharge lamp and a luminescent rare earth doped glass comprising multiple rare earth cations and a particularly high total rare earth content to generate white light emission. Preferably, the luminescent glass has a 2700K to 7000K black body temperature and color rendering index value exceeding 80. A first embodiment of the glass is composed primarily of P2O5, Al2O3, and alkaline earth and alkali metal oxides, and possesses other properties such as physical and thermal properties that are compatible with conventional melting, forming and other manufacturing steps. Other embodiments of the luminescent glass have a maximum water content of 0.1 wt-% and do not contain any boron. Also the luminescent glass is preferably free of water, boron oxides and nitrides. The luminescent glass can be used as a wavelength converter to produce bright white light emission when pumped by conventional commercially available blue and UV light emitting diode sources.
Owner:SCHOTT AG
Communication network design with wavelength converters
InactiveUS7218851B1Minimize network resource usageImprove performanceTransmission monitoringOptical multiplexEngineeringCommunication network design
A design system receives a configuration of the communication network wherein the configuration includes a plurality of nodes and a plurality of links interconnecting the nodes. The design system also receives a protection scheme for the communication network. The design system then processes the configuration and the protection scheme to determine placements of wavelength converters in at least one of the nodes.
Owner:SPRINT CORPORATION
Thermal compensation in semiconductor lasers
InactiveUS20080063016A1High output powerWithout excessive noiseOptical wave guidanceLaser cooling arrangementsDriving currentHarmonic
The present invention relates to methods for modulating a semiconductor laser and wavelength matching to a wavelength converter using monolithic micro-heaters integrated in the semiconductor laser. The present invention also relates to wavelength matching and stabilization in laser sources in general, without regard to whether the laser is modulated or whether second harmonic generation is utilized in the laser source. According to one embodiment of the present invention, a method of compensating for thermally induced patterning effects in a semiconductor laser is provided where the laser's heating element driving current IH is set to a relatively high magnitude when the laser's driving current ID is at a relatively low magnitude. Additional embodiments are disclosed and claimed.
Owner:CORNING INC
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