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658results about How to "Improve light utilization efficiency" patented technology
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Semiconductor light source apparatus and lighting unit
ActiveUS20110149549A1Easy to useIncrease brightnessPoint-like light sourceProjectorsPhosphorFluorescence
A semiconductor light source apparatus can emit various color lights having high brightness. The semiconductor light source apparatus can include a radiating substrate, at least one phosphor layer disposed on the radiating substrate and a semiconductor light source. The at least one phosphor layer can be composed of at least one of a glass phosphor and a phosphor ceramic and can include at least one of a red phosphor, a green phosphor and a blue phosphor. The light source can be located adjacent the phosphor layer so that light having high brightness emitted from the light source can be efficiently reflected on the radiating substrate via the at least one phosphor layer. Thus, the disclosed subject matter can provide a semiconductor light source apparatus that can emit various color lights having high brightness and a lighting unit using the light source apparatus, which can be used for general lighting, etc.
Owner:STANLEY ELECTRIC CO LTD
Liquid crystal display device, and method and circuit for driving liquid crystal display device
InactiveUS20050140634A1High light use efficiencyLow electric power consumptionStatic indicating devicesLiquid-crystal displayEngineering
Owner:NEC LCD TECH CORP
Vehicle lamp
InactiveUS20090257240A1Good light distributionSimple structureVehicle headlampsPoint-like light sourceCamera lensOptoelectronics
A vehicle lamp including a projector headlight using an LED light source for a low beam can include a shade, an LED light source, an ellipsoidal reflector and a projector lens. Both a focus of the projector lens and a top edge of the shade can be located near a second focus of the reflector. The LED light source can be located near a first focus located below the second focus of the reflector. Therefore, light emitted from the LED light source can be effectively gathered near the focus of the projector lens via the reflector and can be projected via the projector lens with high light use-efficiency. The projector lens can include light dispersing portions or structures on an upside and downside thereof for reducing chromatic aberration. Thus, the lamp can project a favorable light distribution that can conform to light distribution standards for vehicle headlights and the like.
Owner:STANLEY ELECTRIC CO LTD
Planar lighting device and liquid crystal display device using same
InactiveUS20100220261A1Sufficient uniform luminanceImprove light utilization efficiencyCosmonautic condition simulationsLaser using scattering effectsLiquid-crystal displayLight guide
The present invention provides a planar lighting device (1) including: a laser light source (12) which emits a linearly-polarized laser beam; an optical member (13) which receives the laser beam, then parallelize the laser beam, and emits the parallelized laser beam; and a first plate-shaped light guide (20) which receives the parallelized laser beam from an end face portion (20d) and emits the parallelized laser beam from a first major surface (20b). The first light guide includes an optical element (20a) which receives the linearly-polarized parallelized laser beam propagated through the first light guide and emits at least a part of the linearly-polarized parallelized laser beam in a direction substantially vertical to the first major surface. The present invention also provides a liquid crystal display device (3) using the planar lighting device (1) as a backlight lighting device.
Owner:PANASONIC CORP
Lens member and optical unit using said lens member
ActiveUS20100284194A1Good lookingHigh light efficiencyPoint-like light sourceGlobesLight reflectionPrism
A plate-shaped lens member has concentric annular prisms each including an inner annular surface divided from a light-entrance surface of a conventional TIR lens and an outer annular surface divided from a light-reflection surface of the TIR lens in which the light-entrance surface has a concave shape provided in a lower portion of the TIR lens and the light-reflection surface has a convex shape positioned at a peripheral side of the TIR lens to surround the light-entrance surface. The light-entrance surface and light-reflection surface of the bulky TIR lens are Fresnel-ized or divided into a set of concentric annular prisms on a surface of the plate-shaped lens member and positions of divided portions from the TIR lens are efficiently arranged on the surface of the plate-shaped lens member.
Owner:CITIZEN WATCH CO LTD +1
Laser image display, and optical integrator and laser light source package used in such laser image display
ActiveUS20100165307A1High light use efficiencyUniform brightnessProjectorsColor television detailsLaser lightIntegrator
A laser image display comprising a laser light source emitting laser light, a beam deflector element for receiving laser light and deflecting its advancing direction, a beam deflecting element control section for controlling the degree of deflection performed by the beam deflector element, an optical integrator for receiving and guiding the deflected laser light to output from its outputting end face, a pseudo surface light source element for scattering the deflected laser light, and a modulation element for receiving and modulating the laser light scattered by the false surface light source element.
Owner:PANASONIC CORP
Light-emitting unit, light-emitting device, illumination device, and vehicle headlight
ActiveUS20150062943A1Improve light utilization efficiencyLow efficiencyVehicle headlampsPoint-like light sourceFluorescenceLight filter
A light-emitting unit according to the present invention includes: a fluorescent section for emitting light upon irradiation with a laser beam; and a wavelength selection filter being provided so as to face the fluorescent section. The wavelength selection filter reflects the laser beam toward the fluorescent section and transmits fluorescence emitted from the fluorescent section.
Owner:SHARP FUKUYAMA LASER CO LTD
Planar lighting device
ActiveUS20090103328A1Thinner configurationImprove light utilization efficiencyMechanical apparatusPlanar/plate-like light guidesExit planeLight guide
The planar lighting device includes a light guide plate including two symmetrical, inclined planes increasingly distanced from the light exit plane with the increasing distance from the light entrance planes toward the center, a curved portion joining the inclined planes, and scattering particles dispersed therein; light sources; a housing; a securing unit securing the light sources and light guide plate to keep their distance constant, and a sliding mechanism allowing the securing unit to slide. Distance between the light entrance planes, thicknesses at the light entrance planes and at the central curved portion, its radius of curvature and taper of the inclined planes are all held within respective given ranges as well as scattering particle diameter and density, light use efficiency and middle-high ratio of the brightness distribution. A thin planar lighting device yielding high light use efficiency with a minimized brightness unevenness and a high-in-the-middle brightness distribution.
Owner:FUJIFILM CORP
Colored filter substrate and display module
ActiveCN104460103AImprove light utilization efficiencyReduce lossesNon-linear opticsQuantum dotOptoelectronics
The invention provides a colored filter substrate and a display module. The colored filter substrate comprises a substrate body, black matrixes arranged on the substrate body, a color resistance layer and a quantum dot layer, wherein multiple subpixel areas are defined by the black matrixes, the color resistance layer is arranged in the subpixel areas and located on the substrate and comprises at least two colored color resistance units in different colors and at least one transparent color resistance unit, the quantum dot layer is arranged in the subpixel areas and located on the side, away from the substrate, of the color resistance layer, and quantum dots which can generate corresponding colors after being stimulated are arranged in the quantum dot layer and correspond to the colored color resistance units in different colors. In this way, the colored color resistance units just need to filter out exciting light which is not completely absorbed and mixed with light in the corresponding color, light loss is reduced, and the light utilization rate of the colored filter substrate is increased.
Owner:XIAMEN TIANMA MICRO ELECTRONICS +1
Display device
InactiveUS20160091757A1Reduce power consumptionIncrease power ratioNon-linear opticsLiquid-crystal displayDisplay device
The display device includes: an array substrate having an in-cell polarizing layer and a color layer; a counter substrate; a liquid crystal layer; a white light source; and a polarizing plate placed on the counter substrate on its one side opposite to a side on which the liquid crystal layer is provided. The color layer includes a red color layer, a green color layer and a blue color layer. The red color layer includes a red color filter and a red wavelength conversion layer which is located on its one side closer to the white light source than the red color filter. The green color layer includes a green color filter and a green wavelength conversion layer which is located on its one side closer to the white light source than the green color filter. The blue color layer includes a blue color filter.
Owner:JAPAN DISPLAY INC
Surface light source device
ActiveUS20110286237A1Easy to manufactureExcessive light leakageMechanical apparatusPlanar/plate-like light guidesLight guideOptoelectronics
A light guide plate is formed of a light introducing part positioned to face a point light source for confining light and a light guide plate body having a thickness smaller than the thickness of an end of the light introducing part on a point light source side and causing the confined light to be output from a light exit surface to outside. The light introducing part has an inclined surface, and a directivity conversion pattern formed on the inclined surface. The directivity conversion pattern is configured by arranging V grooves in parallel to each other, each having a vertical angle of 120°, and each extends in a direction approximately perpendicular to a light incidence end face of the light guide plate. The length of the inclined surface in a inclination direction where part of light incident to the light introducing part enters the inclined surface at least twice.
Owner:TOHOKU DENSHI CO LTD
Near-field light generating element and heat-assisted magnetic recording head utilizing surface plasmon mode
ActiveUS20100061200A1Avoid excessive heatBetter heat-assisted magnetic recordingCombination recordingArm with optical waveguideHeat-assisted magnetic recordingSurface plasmon
Provided is a near-field light generating element capable of avoiding excessive temperature rise, which comprises a waveguide and a near-field light generating layer. The layer comprises: a propagation surface on which surface plasmon excited by the light propagates; and a near-field light generating end at which near-field light is generated. The end is one end of the propagation surface. And a portion of the side surface of the waveguide is opposed to a portion of the propagation surface of the near-field light generating layer with a predetermined spacing so that the light propagating through the waveguide is coupled with the near-field light generating layer in a surface plasmon mode. The near-field light generating layer is preferably tapered toward the near-field light generating end.
Owner:TDK CORPARATION
Near-field light generating element comprising surface plasmon antenna with surface or edge opposed to waveguide
ActiveUS20100149930A1Improve light use efficiencyReduced propagation lossCombination recordingArm with optical waveguideWavenumberWaveguide
Provided is a near-field light generating element in which reduced is the propagation loss of excited surface plasmon that propagates to the near-field light generating end. The element comprises: a waveguide through which light for exciting surface plasmon propagates; and a plasmon antenna comprising a near-field light generating end and a propagation surface or edge. The propagation surface or edge extends to the near-field light generating end, and causes surface plasmon excited by the light to propagate thereon. Further, a portion of the side surface on the near-field light generating end side is opposed to the propagation surface or edge with a predetermined distance so as for the light to be coupled with the plasmon antenna in a surface plasmon mode. In this configuration, surface plasmon can propagates without significantly changing its wavenumber, which leads to a less propagation loss, and to an improved light use efficiency.
Owner:TDK CORPARATION
Light Guide Element, Backlight Unit, and Display Device
InactiveUS20120262940A1Reduce color mixingReduce manufacturing costMechanical apparatusStatic indicating devicesLight guideDisplay device
An object is to provide a novel structure of a backlight unit using color-scan backlight drive, which can relieve a color mixture problem. A backlight unit including a plurality of light guide elements is used. The light guide element has a shape extended in the x direction. The light guide element has a shape of rectangular column. Grooves are provided on a bottom surface of the light guide element so as to traverse it in the y direction. Light sources are provided at the ends of the light guide element in the x direction to supply light into the light guide element. Light supplied into the light guide element is reflected by the grooves in the z direction, and emitted to the outside of the light guide element through the top surface. A reflective layer may be provided under the bottom surface of the light guide element.
Owner:SEMICON ENERGY LAB CO LTD
Display panel and display device
InactiveUS20120019740A1Reduce contrastImprove light utilization efficiencyNon-linear opticsOptical elementsLiquid-crystal displayPhosphor
Disclosed is a liquid crystal display panel wherein the utilization efficiency of light can be improved, while suppressing deterioration of the contrast. Specifically, a color filter (17) of a liquid crystal display panel (10) comprises: a black matrix (21) which is provided with an opening (2a); a red phosphor layer (22) and a red filter layer (23) which are arranged within the opening (21a) in a red display region (R); a green phosphor layer (24) and a green filter layer (25) which are arranged within the opening (21a) in a green display region (G); and a transparent resin layer (26) and a blue filter layer (27) which are arranged within the opening (21a) in a blue display region (B) A light exit surface of the transparent resin layer (26) is provided with a plurality of projected portions (26c), and the transparent resin layer (26) has a refractive index different from that of the blue filter layer (27), which is in contact with the light exit surface. The transparent resin layer (26) is a light diffusion layer, and is capable of increasing the viewing angle of blue light.
Owner:SHARP KK
Vehicle headlight
InactiveUS20100309679A1Improved farawayImproved distance visibilityVehicle headlampsOptical signallingEffect lightDistribution pattern
A projector headlight for a low beam can include a first and second lighting unit. Each of the first and second lighting units can include an LED light source, an ellipsoidal reflector, a projector lens and a shade. Light emitted from the LED light source can form a light distribution pattern from the projector lens via the ellipsoidal reflector by shielding an upwards portion of the light with the shade. The shade of the second lighting unit may be configured so as not to project light on a specific point under a cut-off line on an oncoming lane using a convex portion thereon. Therefore, the first lighting unit can project light with a maximum light intensity at the specific point so as to overlap the light distribution pattern formed by the second lighting unit. Thus, the projector headlight can perform a favorable light distribution pattern that can conform to a light distribution standard for headlights.
Owner:STANLEY ELECTRIC CO LTD
Photoluminescence liquid crystal display
InactiveUS7750984B2Improve light utilization efficiencyLoss of light amountOptical light guidesNon-linear opticsLiquid-crystal displayPhotoluminescence
Owner:SAMSUNG ELECTRONICS CO LTD
Near-Field Light Transducer Comprising Propagation Edge With Predetermined Curvature Radius
ActiveUS20110038236A1Satisfactory thermally-assisted magnetic recordingImprove light utilization efficiencyCombination recordingRecord information storageSurface plasmonTransducer
Provided is a near-field light transducer with a propagation edge in which the generation of defects is suppressed. The transducer is formed of a Ag alloy and comprises an edge, the edge comprising a portion to be coupled with a light in a surface plasmon mode, the edge extending from the portion to a near-field light generating end surface, and the edge being configured to propagate surface plasmon excited by the light. Further, a curvature radius of the rounded edge is set in the range from 6.25 nm to 20 nm. In the edge and its vicinity, the generation of defects such as cracking and chipping is suppressed. Thereby improved are a propagation efficiency of surface plasmon and a light use efficiency of the transducer. The Ag alloy preferably contains at least one element selected from a group of Pd, Au, Cu, Ru, Rh and Ir.
Owner:TDK CORPARATION
Electro-optic device, method for manufacturing electro-optic device, projector, and electronic apparatus
InactiveUS20070200975A1Display brightIncrease contrastProjectorsPicture reproducers using projection devicesEngineeringElectron
Owner:SEIKO EPSON CORP
Planar lighting device including light source/light guide sliding mechanism
ActiveUS7771108B2Increasing the thicknessIncreasing weight and costPlanar/plate-like light guidesIlluminated signsExit planeLight guide
Owner:FUJIFILM CORP
Surface light source device and LCD unit
ActiveUS20100110334A1Improve light utilization efficiencyIncrease brightnessDigital data processing detailsNon-linear opticsLight guideSubject matter
The disclosed subject matter includes providing a surface light source device with high brightness that can emit light from both surfaces and an LCD unit having the same qualities. The surface light device can include a light guide having a light incoming surface, a reflecting sheet located adjacent the light guide, a transparent sheet having a light incoming surface located adjacent the reflecting sheet and a light source located toward both light incoming surfaces. Light emitted from the light source can be configured to enter into the light guide and the transparent sheet via the light incoming surfaces. The light can be efficiently emitted in both directions from the light guide and the transparent sheet using the reflecting sheet. Therefore, an LCD unit that includes an LCD located adjacent the light guide and a second display located adjacent the transparent sheet can illuminate displays with higher brightness.
Owner:STANLEY ELECTRIC CO LTD
Display operable in both reflective and transmissive modes
ActiveUS20120062527A1Improve light utilization efficiencyReduce power consumptionCathode-ray tube indicatorsNon-linear opticsDisplay deviceOptoelectronics
A display apparatus includes a first display panel with a plurality of first pixels, a second display panel facing the first display panel and having a plurality of second pixels, a light reflective polarizer, and a backlight unit. The light reflective polarizer is interposed between the first and second display panels to transmit light polarized in a first direction, and reflect light polarized in a second direction substantially perpendicular to the first direction. The backlight unit is arranged proximate to the second display panel to supply light to the first and second display panels. The first display panel displays an image by using reflected ambient light, and the second display panel displays an image by using light from the backlight unit.
Owner:PUSAN NAT UNIV IND UNIV COOPERATION FOUND +1
Near-Field Light Generating Element Comprising Surface Plasmon Antenna And Waveguide With Groove
ActiveUS20100172220A1Improve light utilization efficiencyConvenient lightingCombination recordingArm with optical waveguideSurface plasmonWaveguide
Provided is a near-field light generating element in which as much amount as possible of waveguide light can be coupled with a plasmon antenna. The element comprises a light waveguide and a plasmon antenna comprising a surface or edge for propagating surface plasmon excited by waveguide light, extending to a near-field light generating end. A groove is formed in a waveguide side surface. And at least a portion of the surface or edge is embedded in the groove or located directly above the groove, being opposed to a wall or bottom surface of the groove with a predetermined distance, so as for waveguide light to be coupled with the plasmon antenna in surface plasmon mode. This configuration enables the surface or edge to be located at the position in which the surface or edge can be coupled with more amount of light, thereby to improve the light use efficiency.
Owner:TDK CORPARATION
Light source unit for thermally-assisted magnetic recording
ActiveUS20110128827A1High degree of accuracyHigh light use efficiencyCombination recordingSemiconductor laser optical deviceRecording headElectricity
Provided is a light source unit the weight of which can be reduced while ensuring power supply to the light source. The light source is configured to form a thermally-assisted magnetic recording head by being joined with a slider including an optical system that propagates light for thermal assist. The light source unit comprises: a unit substrate including a joining surface that faces an power-supply electrode of the slider; a first electrode provided on the joining surface; a second electrode provided on a source-installation surface and electrically connected to the first electrode; and a light source that includes two electrode layers and a light-emission center located in a light-emitting surface. The first and second electrodes eliminate the provision of a terminal electrode for light source on the source-integration surface. As a result, the weight of the light source unit can be reduced.
Owner:TDK CORPARATION
Lighting Device and Projector
ActiveUS20130002972A1Increase brightnessHigh light use efficiencyNon-electric lightingPoint-like light sourceLight sourceLight beam
A lighting device includes a first light source, a second light source of a light-emitting surface area larger than that of the first light source, first light-converging optics configured to converge light from the first light source into a first light beam, second light-converging optics configured to converge light from the second light source into a second light beam, and an illumination optical system configured to make the first light beam and the second light beam into illumination light, with a f-number of the illumination optical system for the second light beam being lower than a f-number of the illumination optical system for the first light beam.
Owner:PANASONIC CORP
Optical element, polarizing element, lighting device, and liquid crystal display
InactiveUS20060262401A1Increase brightnessEffective reflectionPolarising elementsSpectral modifiersLiquid-crystal displayTransmittance
Owner:NITTO DENKO CORP
Light guide plate and surface light source device
ActiveUS20150293289A1Efficient entryReduce light leakageMechanical apparatusPlanar/plate-like light guidesLight guideOptoelectronics
A light guide plate has a light guide plate member having a light incident surface on an end face of the light guide member, and a light emitting surface on a front surface of the light guide plate member, wherein the light incident surface is structured to have light incident thereon, and wherein the light emitting surface is structured to widen and emit light incident thereon out of the light guide plate member, and a directivity changing unit arranged on a light incident end portion of the light guide plate member on the front surface or a back surface of the light guide plate member. The directivity changing unit has a first inner inclined surface and a second inner inclined surface that change a directivity of the incident light within the directivity changing unit to widen the light laterally with respect to a direction perpendicular to the light incident surface.
Owner:ORMON CORP
Two-dimensional image forming apparatus
ActiveUS20060227293A1Improve light use efficiencyHigh-quality image displayDiffusing elementsProjectorsMillimetre/secondSpeckle noise
A two-dimensional image formation apparatus according to the present invention is provided with laser sources (1a)˜(1c), diffusers (6a)˜(6c) for diffusing light, illumination optical systems for irradiating the diffusers (6a)˜(6c) with lights emitted from the laser sources (1a)˜(1c), diffuser vibration units (13a)˜(13c) for vibrating the diffusers (6a)˜(6c), and spatial light modulators (7a)˜(7c) disposed near the diffusers (6a)˜(6c), for modulating the lights emitted from the laser sources (1a)˜(1c) and diffused by the diffusers (6a)˜(6c), wherein the diffusers (6a)˜(6c) are vibrated by the diffuser vibration units (13a)˜(13c) at a velocity that satisfies a relationship, V>d×30 (millimeters / sec), which is established between the grain size d of the diffusers and the vibration speed V of the diffusers, whereby speckle noise existing in an image projected on a screen (11) can be effectively reduced.
Owner:PANASONIC CORP
Light guide plate and side-emitting backlight module having the same
ActiveUS20090109703A1Improve optic distributionImprove light gatheringOptical light guidesReflectorsCrest lineLight guide
A light guide plate and a side-emitting backlight module having the same are disclosed. The light guide plate includes a transparent substrate, a plurality of prisms and a plurality of condensing lenses. The prisms are arranged side by side on one surface of the transparent substrate. The condensing lenses are disposed between two adjacent prisms, and distributed from sparsely to densely along a direction of a crest line of each of the prisms.
Owner:NANO PRECISION TAIWAN LTD
Optical device, projector, and method of producing optical device
ActiveUS20150293271A1Improve light utilization efficiencyDiffusing elementsProjectorsRefractive indexLight beam
An optical device includes a base material including a surface on which multiple concaves are formed. The concaves include respective curved surfaces. The concaves are formed so that the bottoms of the concaves are at two or more different positions in a depth direction. In the optical device, 2 / 7≦|(n1−n2)×Δd| / λ≦10 holds, where n1 is the refractive index of the base material, n2 is the refractive index of a medium around the concaves, λ is the wavelength of a beam flux that enters the base material, and Δd is a range of the positions of the bottoms in the depth direction.
Owner:ASAHI GLASS CO LTD
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