WO2015173814A2 - Éclairage spatial à rendement énergétique élevé - Google Patents

Éclairage spatial à rendement énergétique élevé Download PDF

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Publication number
WO2015173814A2
WO2015173814A2 PCT/IL2015/050500 IL2015050500W WO2015173814A2 WO 2015173814 A2 WO2015173814 A2 WO 2015173814A2 IL 2015050500 W IL2015050500 W IL 2015050500W WO 2015173814 A2 WO2015173814 A2 WO 2015173814A2
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WO
WIPO (PCT)
Prior art keywords
diffuser
refractive
light
volumetric
fixture
Prior art date
Application number
PCT/IL2015/050500
Other languages
English (en)
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WO2015173814A3 (fr
Inventor
Ofer BECKER
Original Assignee
Scopustech Acs Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Scopustech Acs Ltd. filed Critical Scopustech Acs Ltd.
Publication of WO2015173814A2 publication Critical patent/WO2015173814A2/fr
Publication of WO2015173814A3 publication Critical patent/WO2015173814A3/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/70—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing phosphorus
    • 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
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/12—Combinations of only three kinds of elements
    • F21V13/14—Combinations of only three kinds of elements the elements being filters or photoluminescent elements, reflectors and refractors
    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/06—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
    • F21V3/062—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being plastics
    • F21V3/0625—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being plastics the material diffusing light, e.g. translucent plastics
    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/06—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
    • F21V3/063—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material comprising air or water bubbles, e.g. foamed materials
    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/06—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
    • F21V3/08—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material comprising photoluminescent substances
    • 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
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
    • F21V9/38—Combination of two or more photoluminescent elements of different materials

Definitions

  • the present invention relates to light fixtures. More particularly, the present invention relates to energetically efficient spatial illumination solutions.
  • Common light fixtures used for indoor or outdoor illumination, typically employ optical diffusive or refractive elements to spread the light from a light source.
  • Optical diffusers are used in these light fixtures for spatial illumination, with the diffusers providing symmetrical scattering in order to achieve "softer" light.
  • the ongoing move toward illumination point sources such as light emitting diodes
  • LEDs aims to control the illumination more effectively; however the visible speckle contrast on the light fixture can actually increase compared to the contrast when using more traditional light sources. If more than one diffuser is used to decrease speckle contrast, common commercial symmetric diffusers can inefficiently spread the light in the light fixture. As a result, more light is absorbed within the fixture due to backscatter and the forward scattered light can scatter inefficiently in undesirable directions.
  • Typical diffusive elements are surface -relief or volumetric-diffusers.
  • Surface-relief elements can scatter symmetrically or asymmetrically, and volumetric-diffusers have precisely suspended particles within a substrate that can guide light through reflection in the volume of the substrate in a controlled fashion.
  • Commercially available volumetric materials can be free-standing, laminated or otherwise optically coupled (i.e. transferring light between two optical components via a solid medium with a required refractive index) for instance with a clear adhesive, to another element such as a substrate, or waveguide since they do not rely on the refractive index difference between the element and air in order to re-direct light; however these materials typically cannot efficiently control the scattering of light.
  • Refractive elements can also be used to control the spread of light from a light fixture.
  • These refractive elements include prism structures, small or micro-lens structures, indentions or other curved or angled structures. Several small bright spots in the fixture (that are aesthetically unpleasing) can be created due to the appearance of these structures. Since these refractive elements inherently have at least one surface that is not planar, they are therefore significantly thicker than volumetrically scattering diffusive elements. Additionally, refractive elements are not easily cleaned due to their surface structure so that continuous maintenance can be required. Typically, when commercially available volumetric or surface -relief diffusion is used to scatter the light and make the spatial luminance more uniform, there is a significant tradeoff between backscatter and luminance uniformity. High isotropic diffusion in the volume or surface generates a significant amount of backscatter, with a portion of this backscatter absorbed within the fixture due to residual absorption in the "white" regions and the light source that do not perfectly reflect the light.
  • an energetically efficient illuminating fixture comprising a light source array having a plurality of illumination point sources; and a weak volumetric refractive diffuser optically coupled to the plurality of illumination point sources; wherein said volumetric refractive diffuser contains refractive particles.
  • the volumetric refractive diffuser further contains reflective particles.
  • the volumetric refractive diffuser comprises a polymeric diffuser with dispersed particles having a refractive index different from the refractive index of the polymeric diffuser.
  • the volumetric refractive diffuser comprises a polymeric diffuser with air gaps at predetermined regions.
  • the polymeric diffuser comprises polycarbonate.
  • the volumetric refractive diffuser is extruded.
  • the illumination point sources are blue light emitting diodes, and wherein a phosphoric additive is dispersed in the weak volumetric refractive diffuser.
  • the blue light emitting diodes are configured to allow exciting the phosphorus additive.
  • excitation of the phosphorus additive causes the additive to fluoresce in a wavelength different from the wavelength of the light emitted by the blue light emitting diodes, thereby creating illumination output of high color rendering index.
  • the phosphoric additive is dispersed in several regions in the weak volumetric refractive diffuser.
  • an energetically efficient prismatic illuminating fixture comprising a plurality of light source arrays, each having a plurality of illumination point sources; and a plurality of volumetric refractive diffusers, each volumetric refractive diffuser optically coupled to a light source array; wherein said volumetric refractive diffuser contains refractive particles.
  • the volumetric refractive diffuser further contains reflective particles.
  • each volumetric refractive diffuser comprises a polymer diffuser with dispersed particles having a refractive index different from the refractive index of the polymeric diffuser.
  • the volumetric refractive diffuser comprises a polymer diffuser with air gaps at predetermined regions in the diffuser.
  • the polymer diffuser is polycarbonate.
  • the volumetric refractive diffuser is manufactured by extrusion.
  • the illumination point sources are blue light emitting diodes, and wherein an additive of phosphorus is volumetrically dispersed in the volumetric refractive diffuser.
  • the blue light emitting diodes are configured to allow exciting the phosphorus additive.
  • excitation of the phosphorus additive emits light in a different wavelength, thereby creating illumination output of high color rendering index.
  • the phosphoric additive is dispersed in several regions in the volumetric refractive diffuser.
  • an energetically efficient collimated illuminating fixture comprising a light source array having a plurality of illumination point sources; a volume refractive diffuser optically coupled to the plurality of illumination point sources with a medium having a compatible refractive index; and a collimator therebetween, configured to allow collimating light from the light source array towards the volume refractive diffuser; wherein said volume refractive diffuser contains refractive particles.
  • the collimator illuminating fixture further comprises an exit lens coupled to the diffuser and configured to allow dispersing the light exiting the diffuser.
  • the fixture further has reflector strips coupled to the light source array and configured to allow directing light from the light source array towards the volume refractive diffuser.
  • the volume refractive diffuser further contains reflective particles.
  • the volume refractive diffuser is a polymer diffuser with dispersed particles having a refractive index different from the refractive index of the polymer diffuser.
  • the volume refractive diffuser is a polymer diffuser with air gaps at predetermined positions.
  • the polymer diffuser is polycarbonate.
  • the volume refractive diffuser is manufactured by extrusion.
  • the illumination point source is blue light emitting diodes, and wherein an additive of phosphorus is volumetrically dispersed in the volume refractive diffuser.
  • the blue light emitting diodes are configured to allow exciting the phosphorus additive.
  • excitation of the phosphorus additive emits light in a different wavelength, thereby creating illumination output of high color rendering index.
  • the phosphoric additive is dispersed in several regions in the volume refractive diffuser.
  • FIG. 1 schematically illustrates a cross-sectional side view of a commercially available light fixture, according to an exemplary embodiment.
  • FIG. 2A schematically illustrates a cross-sectional side view of a prismatic light fixture, according to an exemplary embodiment.
  • FIG. 2B schematically illustrates a cross-sectional side view of a point light source coupled to a volumetric refractive diffuser.
  • - Fig. 3A illustrates a perspective view of an oval light fixture with reflector strips, according to an exemplary embodiment.
  • - Fig. 3B illustrates a perspective view of the same oval light fixture but without reflector strips.
  • FIG. 4A schematically illustrates a cross-sectional frontal view of the oval light fixture, according to an exemplary embodiment.
  • FIG. 4B schematically illustrates a cross-sectional frontal view of a spot type light fixture, according to an exemplary embodiment.
  • FIG. 5 schematically illustrates a frontal view of a prismatic set light fixture, according to an exemplary embodiment.
  • FIG. 6A shows the light path in a substance with reflective particles, as carried out in an experiment.
  • Fig. 6B shows the light path in a substance with refractive particles, as carried out in an experiment.
  • Fig. 6C shows a graph summarizing the behavior of light paths in a single cavity, as carried out in an experiment.
  • Fig. 1 schematically illustrates a cross-sectional side view of a commercially available light fixture 10.
  • the commercially available light fixture 10 has a light source array 2 at a first end, with a plurality of white light emitting diodes 4 (WLEDs) generating high intensity (e.g. -100W) white light appearing to originate from a natural source, and thus having a high color rendering index (CRI).
  • WLEDs white light emitting diodes 4
  • CRI color rendering index
  • WLEDs are typically standard blue light emitting diodes covered with a yellow phosphorescent material that converts monochromatic light from the blue (or UV) LEDs into broad-spectrum white light (similarly to excitation of phosphorusus in fluorescent light bulbs).
  • the commercially available light fixture 10 further includes a volumetric reflective diffuser 8 at a second end, opposite the light source array 2, with an air gap 3 (e.g. of 30 millimeters) between the volumetric reflective diffuser 8 and the light source array 2.
  • the volumetric reflective diffuser 8 contains suspended particles that reflect light (arriving from the light source array 2) in various directions so that the light exiting the reflective diffuser 8 (in a Lambertian reflection) at the second end is dispersed at a wider angle. With this structure, light exiting the commercially available light fixture 10 appears to originate from multiple point sources (if the air gap 3 is reduced) due to the light scattered only from reflective particles in the reflective diffuser 8.
  • Fig. 2A schematically illustrates a cross-sectional side view of a prismatic light fixture embodiment 20.
  • the prismatic light fixture 20 comprises a light source array 22, with a plurality of illumination point sources 24.
  • the illumination point sources 24 may be medium power LEDs that may not damage the optical components due to excess heat (e.g. with intensity of ⁇ 1W).
  • the light source array 22 of the prismatic light fixture 20 is optically coupled (e.g. with an optically clear adhesive) to a weak volumetric refractive diffuser 28, so that there is no air gap between the light source array 22 and the refractive diffuser 28.
  • the weak volumetric refractive diffuser 28 is "weak" in the sense that light rays are deflected in much smaller angles compared with Lambertian dispersion (in commercially available diffusers), thereby creating much smaller dispersion on light entering the weak volumetric refractive diffuser 28.
  • the volumetric refractive diffuser 28 With the light source array 22 directly optically coupled (for instance with an optically clear adhesive) to the volumetric refractive diffuser 28 with no air in between, essentially all light from the point light source 24 is distributed in the volumetric refractive diffuser 28 (in contrast to the commercially available light fixture 10, shown in Fig. 1). Since all light from the illumination point sources 24 may now be distributed in the refractive diffuser 28, the total efficiency of the prismatic light fixture 20 may increase; an increase of about 8 percent has been measured (compared to the commercially available light fixture 10, shown in Fig. 1) ⁇
  • a further advantage of this optical coupling to the volumetric refractive diffuser 28, is that the fixture may be an open system, i.e. the fixture does not require a casing over the diffuser, since an air gap is not required (in contrast to the commercially available light fixture 10, shown in Fig. 1).
  • the weak volumetric refractive diffuser 28 contains refractive particles (e.g. a polymeric diffuser with particles having a different refractive index). These refractive particles have concentrations, sizes, and positions within the refractive diffuser 28 that provide a smaller diffusion angle (relatively to the commercially available volumetric reflective diffuser) and achieve a desired illumination.
  • the path of the light in the volumetric refractive diffuser 28 may be effectively directed (due to the refractive nature of the refractive particles), in contrast to light being reflected towards the light source, until finally exiting the reflective diffuser 8, shown in Fig. 1.
  • Fig. 2B schematically illustrates a cross-sectional side view of a point light source 24 coupled to the weak volumetric refractive diffuser 28, with exemplary refractive particles 21 refracting the light from the point light source 24 (the path of the light is illustrated with dashed arrows).
  • the weak volumetric refractive diffuser contains both refractive and reflective particles.
  • the weak volumetric refractive diffuser (e.g. made of polycarbonate) has a
  • bubble core with gaseous gaps (having a refractive index equal to 1) instead of physical particles. Since the medium is changed between the weak volumetric refractive diffuser and the gas filled gaps, the gas bubble may act as a refractive and/or reflective medium.
  • the weak volumetric refractive diffuser may be extruded. With the process of extrusion, the core bubble in the diffuser may be created by extruding the volumetric refractive diffuser with gaps in predetermined regions.
  • the illumination point sources may be blue LEDs with an additive of phosphorusus volumetrically dispersed in the weak volumetric refractive diffuser, instead of directly covering the illumination point sources. If this is done in a commercially available light fixture (having an air gap between the light source and the diffuser, as shown in Fig. 1), then the light is radiated in a different wavelength, due to phosphorus emission in a random direction from excitation of the phosphorusus layer (with some returning in the direction of the light source).
  • the total efficiency of the prismatic light fixture may increase as a larger portion of the light emitted from the phosphorusus (in the weak volumetric refractive diffuser) must be dispersed (compared to commercially available light fixtures where only 50% of light is dispersed, as shown in Fig. 1). Excitation of the phosphorus additive may cause the additive to fluoresce in a wavelength different from the wavelength of the light emitted by the blue LEDs, thereby creating illumination output of high CRI.
  • the illumination point sources may be blue LEDs with several regions of phosphorus volumetrically dispersed in the weak volumetric refractive diffuser, instead of covering the illumination point sources directly.
  • a high CRI value may be achieved by mixing different types of phosphorusus, for instance a first section of red phosphorus and a second section of yellow phosphorus.
  • Fig. 3A illustrates a perspective view of an oval (to a first approximation) light fixture embodiment 30.
  • the oval light fixture 30 comprises a light source array 32, with a plurality of illumination point sources 34, and secondary optics with a volume refractive diffuser 38 (similar to the diffuser 8, shown in Fig. 2A).
  • the shape and size of the volume refractive diffuser 38 may be customized. Furthermore, the volume refractive diffuser 38 has a lower section with an exit lens 35 in order to further disperse the light. Other embodiments are not equipped with such lens.
  • the oval light fixture 30 further comprises reflector strips 31 (coupled to the light source array 32) that may direct all light towards the volume refractive diffuser 38, and a parabolic collimator 33 in between the strips and the diffuser 38, further directing the light path towards the volume refractive diffuser 38.
  • the illumination point sources 34 are positioned at the vertex of the collimator 33, thus creating total internal reflection inside the collimator 33.
  • the light dispersion from the volume refractive diffuser 38 may be further controlled in accordance with the requirements of the space to be illuminated.
  • the volume refractive diffuser contains both refractive and reflective particles.
  • the volume refractive diffuser e.g. made of Polycarbonate
  • has a "bubble core" with air filled gaps instead of physical particles (similarly to the volumetric refractive diffuser 28, shown in Fig. 2A).
  • the volume refractive diffuser may be extruded (similarly to the volumetric refractive diffuser 28, shown in Fig. 2A).
  • Chemical foaming agents CFAs
  • CFAs Chemical foaming agents
  • Endothermic CFAs absorb energy and typically release carbon dioxide and moisture upon decomposition, whereas the exothermic CFAs release energy and usually generate nitrogen when decomposed. Blends of these two classes may be utilized for certain profile extrusions, wherein the high gas pressure and volume from the exothermic portion help to fill the profile whereas the controlled gas yield and cooling from endothermic decomposition reduce the profile warpage.
  • Endothermic CFAs are generally known to decompose in the range of 130-230°C, while some of the more common exothermic foaming agents decompose around 200°C.
  • polycarbonate may be used as a polymer in the mixture to be extruded.
  • Polycarbonate has a clear advantage over acrylic polymers that are typically used in commercially available lighting fixtures, as polycarbonate in certain formulations, is a self- extinguishing substance. Note that the commercial systems are closed, as they need to hold the diffuser, whereas this invention provides an "open" system that allows better dissipation of heat. In other embodiments, the shape of the fixture is not oval and/or the collimator is not parabolic.
  • the oval light fixture 30 does not have reflector strips.
  • Fig. 4A schematically illustrates a cross-sectional frontal view of an oval (to first approximation) light fixture 40.
  • almost the entire light fixture 40 is the weak volumetric diffuser 48, without a collimator section (as shown for instance in Fig. 3B).
  • Fig. 4B schematically illustrates a cross-sectional frontal view of a spot type light fixture 41.
  • the spot type light fixture 41 has a flat bottom surface 43 (opposite to the light source array 32) so that the illuminated light from the spot type light fixture 41 is collimated and preferably directed in a downward direction (similarly to a spot light).
  • the illumination point sources may be blue LEDs with an additive of phosphorus volumetrically dispersed in the weak volumetric refractive diffuser, instead of covering the illumination point sources directly (similarly to the volumetric refractive diffuser 28, shown in Fig. 2A).
  • the illumination point sources may be blue LEDs with several regions of phosphorus volumetrically dispersed in the weak volumetric refractive diffuser, instead of covering the illumination point sources directly (similarly to the volumetric refractive diffuser 28, shown in Fig. 2A).
  • a high CRI value may be achieved by mixing different types of phosphorus, for instance a first section of red phosphorus and a second section of yellow phosphorus.
  • Fig. 5 schematically illustrates a frontal view of a prismatic set light fixture 50.
  • the prismatic set light fixture 50 has a plurality of light source arrays 22, with each light source array 22 optically connected to a volumetric refractive diffuser 28 (as shown in Fig. 2A).
  • the prismatic set light fixture 50 in various forms may each be considered as a set of prismatic light fixtures 20; the light fixtures 50 provide various lighting scenarios and deliver a uniform light intensity over desired volumes, while creating esthetically pleasing luminaries.
  • a first exemplary lighting arrangement is fully downward (relative to the light source), for lighting work tables, production areas, etc.
  • a second exemplary lighting scenario is for even lighting of spaces adjacent to the light source, and a third exemplary lighting scenario is for uniform lighting of nearby walls. All of these arrangements may be provided with improved energy efficiency (thereby consuming less electricity) due to the structure of the volumetric refractive diffuser.
  • Figs. 6A-6C show an experiment simulating light paths with reflective and refractive cavities (as the particles).
  • Fig. 6 A shows the light path in a reflector substance with reflective particles
  • Fig. 6B shows the light path in a substance with refractive particles.
  • Fig. 6C shows a graph summarizing the behavior of light paths in a single cavity. The light output with the reflective particles (as shown in Fig.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

Dispositif d'éclairage à rendement énergétique élevé comprenant au moins un réseau de sources de lumière présentant une pluralité de sources d'éclairage ponctuelles et au moins un diffuseur à réfraction volumétrique faible couplé optiquement à la pluralité de sources d'éclairage ponctuelles, le diffuseur à réfraction volumétrique contenant des particules de réfraction, et le diffuseur à réfraction volumétrique comprenant des passages en des zones prédéterminées.
PCT/IL2015/050500 2014-05-13 2015-05-13 Éclairage spatial à rendement énergétique élevé WO2015173814A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL232580 2014-05-13
IL232580A IL232580A0 (en) 2014-05-13 2014-05-13 Energy efficient spatial lighting

Publications (2)

Publication Number Publication Date
WO2015173814A2 true WO2015173814A2 (fr) 2015-11-19
WO2015173814A3 WO2015173814A3 (fr) 2016-01-07

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WO (1) WO2015173814A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109790964A (zh) * 2016-09-23 2019-05-21 卡尔蔡斯耶拿有限公司 用于车辆的照明装置
DE102018123789A1 (de) * 2018-09-26 2020-03-26 Carl Zeiss Jena Gmbh Leuchteinrichtung für ein Fahrzeug
US11537078B2 (en) 2016-09-23 2022-12-27 Carl Zeiss Jena Gmbh Lighting device for vehicles

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8033706B1 (en) * 2004-09-09 2011-10-11 Fusion Optix, Inc. Lightguide comprising a low refractive index region
US8430548B1 (en) * 2004-11-17 2013-04-30 Fusion Optix, Inc. Enhanced light fixture with volumetric light scattering
IL224101A (en) * 2013-01-03 2014-11-30 Solight Ltd Electromagnetic Radiation System

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109790964A (zh) * 2016-09-23 2019-05-21 卡尔蔡斯耶拿有限公司 用于车辆的照明装置
US10816155B2 (en) 2016-09-23 2020-10-27 Carl Zeiss Jena Gmbh Lighting device for a vehicle
US11537078B2 (en) 2016-09-23 2022-12-27 Carl Zeiss Jena Gmbh Lighting device for vehicles
EP3516290B1 (fr) * 2016-09-23 2024-03-20 Carl Zeiss Jena GmbH Dispositif d'éclairage pour un véhicule
DE102018123789A1 (de) * 2018-09-26 2020-03-26 Carl Zeiss Jena Gmbh Leuchteinrichtung für ein Fahrzeug
CN112805599A (zh) * 2018-09-26 2021-05-14 卡尔蔡司耶拿有限责任公司 车辆的照明设备
US11566765B2 (en) 2018-09-26 2023-01-31 Carl Zeiss Jena Gmbh Lighting device for a vehicle
CN112805599B (zh) * 2018-09-26 2024-02-13 卡尔蔡司耶拿有限责任公司 车辆的照明设备

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IL232580A0 (en) 2014-08-31
WO2015173814A3 (fr) 2016-01-07

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