WO2018136723A1 - Luminaire comprenant des diodes électroluminescentes et une cavité de déviation de lumière - Google Patents

Luminaire comprenant des diodes électroluminescentes et une cavité de déviation de lumière Download PDF

Info

Publication number
WO2018136723A1
WO2018136723A1 PCT/US2018/014394 US2018014394W WO2018136723A1 WO 2018136723 A1 WO2018136723 A1 WO 2018136723A1 US 2018014394 W US2018014394 W US 2018014394W WO 2018136723 A1 WO2018136723 A1 WO 2018136723A1
Authority
WO
WIPO (PCT)
Prior art keywords
cavity
geometric solid
luminaire
light
length
Prior art date
Application number
PCT/US2018/014394
Other languages
English (en)
Inventor
John N. Magno
Gene C. Koch
Original Assignee
Ameritech Llc
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 Ameritech Llc filed Critical Ameritech Llc
Publication of WO2018136723A1 publication Critical patent/WO2018136723A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S4/00—Lighting devices or systems using a string or strip of light sources
    • F21S4/20—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports
    • F21S4/28—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports rigid, e.g. LED bars
    • 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
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being 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
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/005—Reflectors for light sources with an elongated shape to cooperate with linear light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0028—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed refractive and reflective surfaces, e.g. non-imaging catadioptric systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • 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
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • LEDs Light emitting diodes
  • LEDs are an energy efficient, highly reliable technology that is finding considerable utility in replacing fluorescent lamps in many lighting applications.
  • An issue with LEDs that limits their utility is that they are point sources as opposed to continuous sources of light. This creates unacceptable glare or poor aesthetics in many lighting applications.
  • U.S. Patent Application No. 15/048,711 describes light emitting diode (LED) based luminaires that comprise transparent geometric solids that are composed of two conjoined geometric solid portions with the two geometric solid portions partially separated by a cavity into which LEDs emit light.
  • FIG. 1 illustrates a cross-section of a luminaire 100 according to various aspects.
  • light from one or more LEDs 108 is emitted into a cavity 122.
  • the light passes through cavity walls 124a, 124b into geometric solid portions 126a, 126b.
  • the cavity 122 has the shape of a triangular prism with an apex 110 at its top (i.e., opposite the LED 108). The included angle at this apex 110 is considerably less than 90° and may be approximately 55°.
  • Luminaires of the type shown in FIG. 1 may have a small "hotspot" of brighter light emission running down the center of the luminaire directly above the apex of cavity 122.
  • U.S. Patent Application No. 15/048,711 suggests that the inclusion of a small diffuse reflector 120 at the apex of the cavity 122 may be
  • a second improvement on the luminaire 100 depicted in FIG. 1 would be to make it wider and lower, that is to say, to increase its width to height ratio.
  • increasing the width to height ratio of the geometric solid 140 to too great a degree causes the uniformity of light output from the luminaire to suffer.
  • FIG. 10 Another aspect of the luminaires described in U.S. Patent Application No. 15/048,711 (shown in FIG. 10 of that application) is the luminaire 200 depicted in cross- section in FIG. 2.
  • a geometric solid 226 fabricated from transparent material is bounded by surfaces 214, 228, 206a, 206b, 212, and end surfaces 232 (not shown).
  • LEDs 208 (only one shown) are mounted on circuit board or substrate 202 and inject light into geometric solid 226.
  • Diffuse reflector 210 is coated onto or adhered to surface 214.
  • Surfaces 206a, 206b, and 212 bound a cavity inside geometric solid 226. These surfaces are coated with diffuse reflectors 204 and 230.
  • Downward facing vertex 234 (e.g., downward facing relative to the positions of the LEDs 208) of cavity 212 lies in the central plane of symmetry of the luminaire and as such is centered over LEDs 208.
  • a portion of the light emitted by the LEDs 208 enters directly into the portions 222a and 222b of geometric solid 226.
  • the remainder of the light emitted by LEDs 208 encounters surfaces 206a and 206b of cavity 212. This light is either reflected from these surfaces or from reflector 230 with the result that it is deflected from its upward path into geometric solid portions 222a and 222b.
  • Light travels upward through solid portions 222a and 222b until it exits through apertures 224a and 224b into portion 238 of geometric solid 226.
  • Part of the light entering portion 238 exits into the outside environment through surface 228.
  • Another portion is reflected back from surface 228 and is reflected from reflector 204 so as to exit into the outside environment.
  • FIG 1 illustrates a cross-section of a prior art luminaire according to various aspects
  • FIG. 2 illustrates a cross-section of another prior art luminaire according to various aspects
  • FIG. 3 A illustrates a cross-section of a luminaire according to various aspects
  • FIG. 3B illustrates a plan view of the luminaire of FIG. 3 A according to various aspects
  • FIG. 4 illustrates a cross-section of another luminaire according to various aspects
  • FIG. 5 illustrates a cross-section of yet another luminaire according to various aspects
  • FIG. 6 illustrates a cross-section of yet another luminaire according to various aspects
  • FIG. 7A illustrates a cross-section of yet another luminaire according to various aspects
  • FIGS. 7B and 7C illustrate enlarged cross-sections of portions of the luminaire of FIG. 7 A according to various aspects.
  • FIG. 8 illustrates a cross-section of yet another luminaire according to various aspects.
  • FIG. 3 A another luminaire 300 is depicted in cross-section in FIG. 3 A and in plan view in FIG. 3B.
  • the luminaire 300 comprises a transparent geometric solid 314 bounded by surfaces 318a, 318b, 322a, 322b, 320a, 320b, 306a, 306b, 306c, 306d, 332a and 332b.
  • the geometric solid 314 has a length, defines a longitudinal axis and may be formed from any suitable optically clear material such as polymethylmethacrylate or polycarbonate.
  • Surfaces 306a through 306d bound a light deflection cavity 312 that runs through the length of geometric solid 314 as shown in FIG. 3B.
  • the cavity 312 is defined by the geometric solid 314.
  • a cross-section of the cavity 312 is uniform along the length of the geometric solid 314.
  • the luminaire 300 comprises four reflectors 304a, 304b, 324a and 324b. Reflector 304a is connected to, coated on or adhered to the curved surface 318a of the geometric solid 314 and the reflector 304b is connected to, coated on or adhered to a curved surface 318b of the geometric solid 314.
  • Reflectors 324a and 324b are connected to, coated on or adhered to the end surfaces 332a and 332b of the geometric solid 314 as shown in FIG. 3B.
  • Reflectors 304a, 304b, 324a, and 324b may be any sort of light reflecting material, but in most cases will be diffuse reflectors.
  • the luminaire 300 further comprises a plurality of discrete sources of light 308 that are mounted on substrate 302.
  • the discrete sources of light 308 may be any suitable type of discrete sources of light.
  • the discrete sources of light 308 may be any suitable type of light emitting diodes.
  • the discrete sources of light will hereinafter be described in the context of light emitting diodes (LEDs). However, it will be appreciated that the discrete sources of light may be other than light emitting diodes.
  • Substrate 302 may be a circuit board or some other substrate that enables the electrical connection of LEDs 308 to an electrical power supply that enables their operation.
  • the LEDs 308 are situated so as to emit light into a cavity 310 bounded by surfaces 322a and 322b of geometric solid 314 and by the surfaces of LEDs 308 as well as substrate 302.
  • the cavity 310 is defined by the geometric solid 314, and may be further defined by the plurality of LEDs 308 and/or the substrate 302.
  • a cross-section of the cavity 310 is uniform along the length of the geometric solid 314. As shown in FIG.
  • the cavity 310 is positioned between the cavity 312 and the plurality of LEDs 308, an apex 328 of the cavity 310 points away from the plurality of LEDs 308 and upward toward the cavity 312, and a vertex 326 of the cavity 312 points downward toward the apex 328 of the cavity 310.
  • the LEDs 308 are aligned with the longitudinal axis of the geometric solid 314. According to other aspects, at least one of the LEDs 308 is offset from the longitudinal axis of the geometric solid 314.
  • Reflectors 304a and 304b may extend onto the surface of substrate 302 that extends underneath cavity 310.
  • the cavity 310 may be further defined by the reflector 304a and/or the reflector 304b.
  • cavity 310 extends the length of geometric solid 314 and thus receives light from all of the light emitting diodes 308.
  • light deflecting cavities like cavity 312, hereinafter we shall refer to cavity 310 and similarly situated cavities as light injection cavities.
  • Both the apex 328 of light injection cavity 310 and the downward pointing vertex 326 of light deflection cavity 312 lie in the central plane of symmetry of the geometric solid 314 and/or the luminaire 300 (where the central plane of symmetry bisects the geometric solid 314 along its length and/or bisects the luminaire 300 along its length) and thus "point" at each other.
  • Light injection cavity 310 and light deflection cavity 312 combine to separate transparent geometric solid into two conjoined portions or lobes 316a and 316b (e.g., first and second geometric solid portions).
  • a cross-section of the first geometric portion is a mirror image of a cross-section of the second geometric portion.
  • the light emitting diodes 308 emit light into the cavity 310.
  • the emitted light traverses the air-filled cavity 310, and some of the light emitted from the light emitting diodes 308 encounters an interface (a refractive index boundary) between the air in the cavity 310 and the transparent solid material comprising the geometric solid portions 316a and 316b.
  • This material interface occurs at surface 322a between the cavity 310 and the geometric solid portion 316a.
  • some this light may enter the geometric solid portion 316a.
  • a considerable portion of the light will be reflected back into the cavity 310 and may exit through the surface 322b.
  • a portion of the light emitted from the light emitting diodes 308 encounters the material interface at the surface 322b. Some of this light may be transmitted through the interface at surface 322b into the geometric solid portion 316b or it may be reflected back into the cavity 310 thence exiting through the surface 322a into the geometric solid portion 316a. It will be appreciated that the two "side" surfaces 322a and 322b of the cavity 310 function both as apertures to transmit light into the geometric solid portions 316a and 316b, and also as reflectors to reflect a portion of light back into cavity 310.
  • the light emitted by the light emitting diodes 308 passes through the surfaces 322a and 322b directly into geometric solid portions 316a and 316b or is deflected into geometric solid portions 316a and 316b by light deflection cavity 312, the light may transverse the geometric solid portions 316a and 316b, and enter the surrounding
  • planar surfaces 320a and 320b may be specularly or diffusely reflected from the reflectors 304a and 304b and enter the surrounding environment through the planar surfaces 320a and 320b.
  • the cross-sectional shape of the geometric solid portions 316a and 316b may be adjusted by introducing curvature or more curvature in its surfaces (for example, the shapes of reflectors 304a and 304b) or otherwise changing the shape of the geometric solid portions so as to optimize the uniformity of light exiting through surfaces 320a and 320b.
  • cavities 310 and 312 may altered by altering the shapes of surfaces 306a, 306b, 306c, 306d, 322a, and 322b or by altering the number of surfaces bounding each of the light injection and light deflection cavities so long as the light injection cavity cross- section has an upward facing apex (e.g., upward facing relative to the respective positions of the light emitting diodes 308) lying in the plane of symmetry that bisects the geometric solid 314 and/or the luminaire 300 along its length and the light deflection cavity has a downward facing vertex (e.g., downward facing relative to the respective positions of the light emitting diodes 308) lying in the same plane of symmetry.
  • the distance between the light injection and light deflection cavities may also be adjusted to optimize the performance of the luminaire 300.
  • the luminaire 400 comprises a transparent geometric solid 414 that is bounded by surfaces 418a, 418b, 420a, 420b, 424, 422a, 422b, 406a, 406b, 406c, and end surfaces 432a and 432b (not shown).
  • Surfaces 406a, 406b and 406c bound a light deflection cavity 412 with vertex 426 located in the plane of symmetry running the length of the geometric solid 414 and/or the luminaire 400.
  • Surfaces 422a and 422b, the surfaces of LEDs 408 as well as substrate 402 (or the reflector overlaying it) bound light injection cavity 410.
  • Luminaire 400 differs from luminaire 300 in that light deflection cavity 412 is bounded by three surfaces instead of four and in that planar emissive surfaces 320b and 320c are replaced by one curved emissive surface 406b.
  • the luminaire 400 further comprises reflectors 404a and 404b as well as substrate or circuit board 402.
  • Luminaire 400 may also comprise reflectors 432a and 432b (not shown) that are connected to, coated on or adhered to end surfaces 424a and 424b.
  • the luminaire 400 further comprises a plurality of light emitting diodes 408 (only one of which is shown) that are mounted on substrate 402 such that they emit light into light injection cavity 410.
  • the mode of operation of the luminaire 400 is the same as luminaire 300 except that the light distribution exiting luminaire 400 is altered from that of luminaire 300 because of its different physical configuration.
  • the use of a light deflection cavity as well as light injection cavity allows more light emanating upward from the LEDs to be diverted to wide angles and thus allows one to design a luminaire with a high width to height ratio.
  • a luminaire 500 demonstrating this is depicted in FIG. 5.
  • the luminaire 500 comprises a transparent geometric solid 514 that is bounded by surfaces 518a, 518b, 520a, 520b, 522a, 522b, 506a, 506b, 506c, and end surfaces 532a and 532b (not shown). Surfaces 520a and 520b combine to form a single planar light emitting surface.
  • Luminaire 500 further differs from luminaire 400 in that light deflection cavity 512 is bounded by a curved upper surface 406b rather than a planar upper surface like 306b.
  • the luminaire 500 further comprises reflectors 504a and 504b as well as substrate or circuit board 502.
  • the luminaire 500 further comprises a plurality of light emitting diodes 508 (only one of which is shown) that are mounted on substrate 502 such that they emit light into light injection cavity 510.
  • the mode of operation of the luminaire 500 is the same as luminaires 300 and 400 except that the light exiting the light injection and light deflection cavities is diverted to wider angles so as to uniformly illuminate the wider upper surface comprising 520a and 520b.
  • the luminaire 600 comprises a transparent geometric solid 614 that is fitted into a mounting case 602.
  • Reflector 604 is connected to, coated on or adhered to mounting case 602 and may also be similarly situated on the end panels 624a and 624b of the mounting case (not shown).
  • Geometric solid 614 is bounded by surfaces 618a, 618b, 620a, 620b, 622a, 622b, 606, and end surfaces 632a and 632b (not shown).
  • the luminaire 600 further differs from the luminaire 500 in that light deflection cavity 612 is bounded by a single surface 606 that has a compound curvature.
  • the light deflection cavities in aspects of the luminaires described herein may be bounded by one, two, three, four, or more surfaces (assuming they are open to air at the ends of the luminaires).
  • Light injection cavity 610 may have a similar configuration to light injection cavity 510 in FIG. 5.
  • the shape of cavity 610 may be altered by altering the shapes of surfaces 622a, and 622b or by altering the number of surfaces bounding cavity 610 so long as the light injection cavity cross-section has an upward facing apex lying in the plane of symmetry that bisects the geometric solid 614 and/or the luminaire 600 along its length and the light deflection cavity has a downward facing vertex lying in the same plane of symmetry.
  • the distance between the light injection and light deflection cavities may also be adjusted to optimize the performance of the luminaire 600.
  • the light injection cavity 610 and light deflection cavity 612 divide geometric solid 614 into two conjoined geometric solid portions 616a and 616b.
  • Both cavities run the length of the luminaire 600 with a uniform cross- section throughout.
  • the luminaire 600 further comprises a plurality of light emitting diodes 608 (only one of which is shown) that are mounted on mounting case 602 such that they emit light into light inj ection cavity 610.
  • the luminaire 600 when light passes from either light injection cavity 610 or light deflection cavity 612 into geometric solid portions 616a and 616b , it may transverse the geometric solid portions 616a and 616b, and enter the surrounding environment or it may strike surfaces 618a and 618b of the geometric solid portions 616a and 616b respectively. Some portion of the light that strikes these surfaces may be reflected because of the refractive index change that occurs in going from transparent material of solid 614 into the air in voids 634a and 634b and eventually exit the luminaire 600 through surfaces 620a and 620b.
  • Another portion of light that strikes surfaces 618a and 618b may be transmitted through these surfaces and traverse voids 634a and 634b. This portion of light may then be reflected from reflector 604 and eventually ally pass back through surfaces 618a and 618b and out through surfaces 620a and 620b into the surrounding environment.
  • FIGS. 7A, 7B and 7C An example of a geometric solid and reflector combination utilized in a retrofit application is depicted in cross-section in FIGS. 7A, 7B and 7C.
  • the luminaire 700 in FIG. 7A comprises a pre-existing circuit board 702 mounted in mounting case 748.
  • LEDs 708 are a plurality of light emitting diodes (LEDs) 708 (only one is shown), optional reflector 736, and LED drive and power electronics 738a and 738b.
  • LEDs light emitting diodes
  • the transparent geometric solid utilized is solid 714 that is bounded by planar surfaces 724a, 724b, 726a, 726b, 728a, 728b, 730a, 730b, 732a, 732b, 720a, 720b,740a, 740b, 742a, 742b, 744a, and 744b; and curved surfaces 718a, 718b, and 734; and surfaces 722a and 722b that have a compound curvature.
  • Surfaces 740a, 740b, 742a, 742b, 744a, and 744b delineate two standoffs 746a and 746b. (These surfaces and features are enlarged/magnified FIGS.
  • Standoffs 746a and 746b help to accurately position geometric solid 714 in the luminaire 700.
  • This transparent geometric solid 714 extends down from its emissive surfaces 720a and 720b (that combine to form a single planar surface) to be in close proximity to LEDs 708. In doing so it must have shape that allows it to accommodate electronics 738a and 738b. This cannot be accomplished in a luminaire that does not include both a light deflection cavity as well as a light injection cavity (at least without at the same time greatly impacting optical performance).
  • Both light injection cavity 710 and light deflection cavity 712 are open to air at the ends of the luminaire 700, but may be bounded by the mounting case 748.
  • Another example of the design flexibility conferred by the presence of a light deflection cavity like 712 is that in the luminaire 700 the light injection cavity need not have a sharply pointed apex as is required in the luminaires disclosed in U.S.
  • Patent Application No. 15/048,711 In the luminaire 700 a sharply pointed apex of cavity 710 is replaced by a relatively flat upper surface 734. Light injection cavity 710 and light deflection cavity 712 combine to separate transparent geometric solid 714 into two conjoined portions or lobes 716a and 716b.
  • the luminaire 700 further comprises reflectors 704a and 704b, and optionally 750a and 750b.
  • Reflector 704a is connected to, coated on or adhered to the surfaces 724a, 726a, 728a, 718a, 730a, 732a, and 740a of the geometric solid portion 716a and the reflector 704b is connected to, coated on or adhered to the surfaces 724b, 726b, 728b, 718b, 730b,
  • Optional reflectors 750a and 750b are connected to, coated on or adhered to the end surfaces 752a and 752b (also not shown) of the geometric solid 714.
  • Reflectors 704a, 704b, 750a, and 750b may be any sort of light reflecting material, but in most cases will be diffuse reflectors.
  • the mode of operation of the luminaire 700 is much the same as luminaires like 300 except that the light distribution exiting luminaire 700 is altered because of its different physical configuration.
  • a luminaire that includes a light deflection cavity, but not a light injection cavity can yield sufficiently acceptable optical performance.
  • An example of this type of luminaire 800 is depicted in FIG. 8.
  • the luminaire 800 comprises a transparent geometric solid 814 bounded by planar surfaces 820a, 820b, 806b, and 806c; and end surfaces 832a and 832b (not shown) as well as curved surfaces 818a, 818b, 806a, and 806d.
  • the bottom surface of geometric solid 814 is indented by a series of pockets or indentations 822 designed to conformally accept a plurality of light emitting diodes (LEDs) 808 (only one is shown in the cross-sectional view).
  • LEDs light emitting diodes
  • the series of pockets 822 may be replaced a groove having the same cross-section as the pockets and running the length of the geometric solid.
  • the plurality of LEDs 808 are attached to substrate 802.
  • Substrate 802 may be a circuit board or some other substrate that enables the electrical connection of LEDs 808 to an electrical power supply that enables their operation.
  • LEDs 808 may be index matched to the walls of pockets 822 using a grease or other index matching material so as to more efficiently couple light into geometric solid 814.
  • the luminaire 800 further comprises a light deflection cavity 812 bounded by surfaces 806a, 806b, 806c, and 806d.
  • Light deflection cavity 812 separates transparent geometric solid 814 into two conjoined portions or lobes 816a and 816b.
  • Light deflection cavity 812 extends the length of geometric solid 814 and thus interacts with light emitted from all of the light emitting diodes 308.
  • the luminaire 800 further comprises reflectors 804a and 804b, and optionally 826a and 826b.
  • Reflector 804a is connected to, coated on or adhered to the surface 818a of the geometric solid portion 816a and the reflector 804b is connected to, coated on or adhered to the surface 818b of the geometric solid 816b.
  • Optional reflectors 824a and 824b are connected to, coated on or adhered to the end surfaces 832a and 832b (also not shown) of the geometric solid 814.
  • Reflectors 804a, 804b, 824a, and 824b may be any sort of light reflecting material, but in most cases will be diffuse reflectors.
  • a portion of the light emitted by LEDs 808 is transmitted directly through the material of geometric solid 814 into geometric solid portions 816a and 816b.
  • the remainder of the light emitted by LEDs 808 encounters surfaces 806a and 806d of air-filled light deflection cavity 812. This light is both reflected and diffracted from these surfaces because of the refractive index boundary encountered in passing from geometric solid 814 into the air in cavity 812. This refraction and reflection deflects light from its near vertical path out into geometric solid portions 816a and 816b.
  • the light emitted by the light emitting diodes 808 passes directly into geometric solid portions 816a and 816b or is deflected into geometric solid portions 816a and 816b by light deflection cavity 812, the light may transverse the geometric solid portions 816a and 816b, and enter the surrounding environment through surfaces 820a and 820b or it may be specularly or diffusely reflected from the reflectors 804a and 804b and then enter the surrounding environment through surfaces 820a and 820b.
  • the cross-sectional shape of the geometric solid portions 816a and 816b may be adjusted by introducing curvature or more curvature in its surfaces (for example, the shapes of reflectors 804a and 804b) or otherwise changing the shape of the geometric solid portions so as to optimize the uniformity of light exiting through surfaces 820a and 820b.
  • the shape of cavity 312 may altered by altering the shapes of surfaces 806a, 806b, 806c, and 806d or by altering the number of surfaces bounding light deflection cavity 812 so long as the light deflection cavity has a downward facing vertex lying in the plane of symmetry that bisects the geometric solid 814 and/or the luminaire 800 along its length.
  • the light deflection may have a shape similar to shapes of one of 312, 412, 512, 612, or 712.
  • the distance between the light deflection cavity and the LEDs may also be adjusted to optimize luminaire performance.
  • the above-described luminaires may also include an optional anti-glare or light diffusing material which is optically connected to the light emitting surfaces of the geometric solid portions of the luminaires (for instance, surfaces 320a and 320b of geometric solid portions 316a and 316b of the luminaire 300).
  • Example 1 - A luminaire comprises a geometric solid having a length.
  • the geometric solid comprises a first geometric solid portion comprising an optically clear material and a second geometric solid portion comprising the optically clear material, wherein the first and second geometric solid portions are conjoined.
  • the luminaire also comprises a first cavity and a second cavity.
  • the first and second cavities extend the length of the geometric solid and are defined by the geometric solid.
  • the luminaire further comprises a plurality of discrete light sources positioned to emit light into the first cavity. An apex of the first cavity points away from the plurality of discrete light sources.
  • Example 2 The luminaire of Example 1, wherein the first geometric solid portion comprises a first curved surface extending the length of the geometric solid and a first planar surface extending the length of the geometric solid, and wherein the second geometric solid portion comprises a second curved surface extending the length of the geometric solid and a second planar surface extending the length of the geometric solid.
  • Example 3 The luminaire of Examples 1 or 2, wherein a cross-section of the first geometric solid portion is a mirror image of a cross-section of the second geometric solid portion.
  • Example 4 The luminaire of Examples 1, 2 or 3, wherein the geometric solid defines a longitudinal axis, and wherein the plurality of discrete light sources are aligned with the longitudinal axis.
  • Example 5 The luminaire of Examples 1, 2 or 3, wherein the geometric solid defines a longitudinal axis, and wherein at least one of the plurality of discrete light sources are offset from the longitudinal axis.
  • Example 6 The luminaire of Examples 1, 2, 3, 4 or 5, wherein the first cavity is further defined by at least one of the following: the plurality of discrete light sources, a substrate, and a reflector.
  • Example 7 The luminaire of Examples 1, 2, 3, 4, 5 or 6, wherein a cross- section of the first cavity is uniform along the length of the geometric solid.
  • Example 8 The luminaire of Claims 1, 2, 3, 4, 5, 6 or 7, wherein the first cavity is positioned between the second cavity and the plurality of discrete light sources.
  • Example 9 The luminaire of Examples 1, 2, 3, 4, 5, 6, 7 or 8, wherein the first cavity is positioned between the second cavity and the plurality of discrete light sources, and wherein the apex of the first cavity points toward a vertex of the second cavity.
  • Example 10 The luminaire of Examples 1, 2, 3, 4, 5, 6, 7, 8 or 9, wherein the apex of the first cavity lies in a central plane of symmetry which bisects the geometric solid and extends along the length of the geometric solid.
  • Example 11 The luminaire of Examples 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, wherein the first cavity is positioned between the second cavity and the plurality of discrete light sources, and wherein a vertex of the second cavity points toward the apex of the first cavity.
  • Example 12 The luminaire of Examples 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or 11, wherein a vertex of the second cavity lies in a central plane of symmetry which bisects the geometric solid and extends along the length of the geometric solid.
  • Example 13 The luminaire of Examples 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12, wherein at least one of the geometric solid and the cavity comprises an extruded material.
  • Example 14 The luminaire of Examples 1, 2, 3, 4, 5, 6, 7, 8 , 10, 11, 12 or
  • Example 15 The luminaire of Examples 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 or 14, wherein at least one of the first and second cavities comprises air.
  • Example 16 The luminaire of Examples 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 or 14, wherein at least one of the plurality of discrete light sources comprises a light emitting diode.
  • Example 17 The luminaire of Examples 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,
  • Example 18 The luminaire of Examples 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,
  • Example 19 The luminaire of Examples 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 or 17, wherein the reflector external to the geometric solid.
  • Example 20 The luminaire of Examples 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 or 19, further comprising a first reflective surface positioned adjacent a first end of the geometric solid and a second reflective surface positioned adjacent a second end of the geometric solid.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Led Device Packages (AREA)

Abstract

La présente invention concerne un luminaire. Le luminaire comprend un solide géométrique ayant une longueur. Le solide géométrique inclut une première partie solide géométrique comprenant un matériau optiquement transparent et une seconde partie solide géométrique comprenant le matériau optiquement transparent, les première et seconde parties solides géométriques étant réunies. Le luminaire comprend également une première cavité et une seconde cavité. Les première et seconde cavités prolongent la longueur du solide géométrique et sont définies par le solide géométrique. Le luminaire comprend en outre une pluralité de sources de lumière discrètes positionnées pour émettre de la lumière dans la première cavité. Un sommet de la première cavité est éloigné de la pluralité de sources de lumière discrètes.
PCT/US2018/014394 2017-01-19 2018-01-19 Luminaire comprenant des diodes électroluminescentes et une cavité de déviation de lumière WO2018136723A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201762447954P 2017-01-19 2017-01-19
US62/447,954 2017-01-19

Publications (1)

Publication Number Publication Date
WO2018136723A1 true WO2018136723A1 (fr) 2018-07-26

Family

ID=62908238

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2018/014394 WO2018136723A1 (fr) 2017-01-19 2018-01-19 Luminaire comprenant des diodes électroluminescentes et une cavité de déviation de lumière

Country Status (1)

Country Link
WO (1) WO2018136723A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070047262A1 (en) * 2005-08-27 2007-03-01 3M Innovative Properties Company Edge-lit backlight having light recycling cavity with concave transflector
US7334933B1 (en) * 2005-11-04 2008-02-26 Simon Jerome H Unified optical collection and distribution of light from quasi-point sources including LEDs, and linear light sources
US20110292652A1 (en) * 2010-05-31 2011-12-01 Lite-On Technology Corporation Led luminaire
US20140145219A1 (en) * 2011-07-01 2014-05-29 Koninklijke Philips N.V. Light Output Device and Method of Manufacture
US20140293614A1 (en) * 2013-03-27 2014-10-02 Hon Hai Precision Industry Co., Ltd. Lens and led light module having the same
US20170002986A1 (en) * 2015-02-20 2017-01-05 Ameritech Llc Luminaire including light emitting diodes

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070047262A1 (en) * 2005-08-27 2007-03-01 3M Innovative Properties Company Edge-lit backlight having light recycling cavity with concave transflector
US7334933B1 (en) * 2005-11-04 2008-02-26 Simon Jerome H Unified optical collection and distribution of light from quasi-point sources including LEDs, and linear light sources
US20110292652A1 (en) * 2010-05-31 2011-12-01 Lite-On Technology Corporation Led luminaire
US20140145219A1 (en) * 2011-07-01 2014-05-29 Koninklijke Philips N.V. Light Output Device and Method of Manufacture
US20140293614A1 (en) * 2013-03-27 2014-10-02 Hon Hai Precision Industry Co., Ltd. Lens and led light module having the same
US20170002986A1 (en) * 2015-02-20 2017-01-05 Ameritech Llc Luminaire including light emitting diodes

Similar Documents

Publication Publication Date Title
US10274160B2 (en) Luminaire for emitting directional and non-directional light
US7686497B2 (en) Variable planar light guide module
US7639918B2 (en) Manifold-type lightguide with reduced thickness
US8075157B2 (en) LED module
US11236887B2 (en) Optical structures for light emitting diodes (LEDs)
US20160131331A1 (en) Luminaire for emitting directional and nondirectional light
RU2011113163A (ru) Компактная оптическая система и линзы для формирования равномерного коллимированного света
US9234641B2 (en) Optical lens and light source device
EP1698823A3 (fr) Balise lumineuse comprenant un réflecteur et des diodes électroluminescentes
KR20180024230A (ko) 연속 비구면커브부를 구비한 다면 렌즈
CN213066002U (zh) 用于修改光分布的光学设备、灯具和模具
US20130322820A1 (en) Optical fiber for a lighting device
EP2279374A1 (fr) Element optique pour une distribution asymetrique de la lumiere
WO2008032277A2 (fr) Luminaire à diodes électroluminenscentes fin et plat diffusant une lumière collimatée
US20120075884A1 (en) Lighting device employing a light guide plate and a plurality of light emitting diodes
US11553566B2 (en) Luminaire for emitting directional and non-directional light
WO2018136723A1 (fr) Luminaire comprenant des diodes électroluminescentes et une cavité de déviation de lumière
US9632240B2 (en) Lighting apparatus and automobile including the same
US20140085874A1 (en) Luminaire
US20100053948A1 (en) Device for mixing light of side emitting leds
US9945535B2 (en) Luminaire including a geometric solid having two geometric solid portions
CN113710952B (zh) 光发射设备
US20180073690A1 (en) Luminaire including light emitting diodes and an anti-glare material
US11867365B2 (en) Luminaire for emitting directional and non-directional light
TW201541017A (zh) 光學透鏡裝置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18741411

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18741411

Country of ref document: EP

Kind code of ref document: A1