EP2834556B1 - Système optique à réseau de del multilentilles - Google Patents

Système optique à réseau de del multilentilles Download PDF

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Publication number
EP2834556B1
EP2834556B1 EP13772520.6A EP13772520A EP2834556B1 EP 2834556 B1 EP2834556 B1 EP 2834556B1 EP 13772520 A EP13772520 A EP 13772520A EP 2834556 B1 EP2834556 B1 EP 2834556B1
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EP
European Patent Office
Prior art keywords
lens
led
lighting apparatus
light
array
Prior art date
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Active
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EP13772520.6A
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German (de)
English (en)
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EP2834556A1 (fr
EP2834556A4 (fr
Inventor
Kurt S. Wilcox
Bernd Keller
Ted LOWES
Peter S. Andrews
Christopher Strom
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Wolfspeed Inc
Original Assignee
Cree Inc
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Priority claimed from US13/441,540 external-priority patent/US9255686B2/en
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Publication of EP2834556A4 publication Critical patent/EP2834556A4/fr
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • 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
    • F21V5/00—Refractors for light sources
    • F21V5/08—Refractors for light sources producing an asymmetric light distribution
    • 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
    • F21V7/0091—Reflectors for light sources using total internal reflection
    • 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
    • F21V5/008—Combination of two or more successive refractors along an optical axis
    • 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
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional 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

  • This invention relates generally to the field of LED lighting apparatus and, more particularly, to the field of LED-based optical systems for use in LED lighting fixtures for which there are particular light-distribution requirements, such as what is sometimes referred to as preferential-side light distribution - for roadway light fixtures and the like.
  • LEDs light-emitting diodes
  • HID high-intensity discharge
  • fixtures for roadway lighting an application in which the fixtures are generally placed along roadway edges while light distribution is desired along a significant portion of roadway length and, of course, on the roadway itself - generally to the exclusion of significant light off the roadway.
  • Providing roadway light from light fixtures along the roadway may be referred to as "preferential-side” illumination.
  • preferential-side illumination it is desirable to minimize the use of large complex reflectors and/or varying orientations of multiple light sources to achieve desired illumination patterns.
  • Achieving preferential-side illumination, or other desired illumination patterns, by means of LED-based optical systems, particularly without resorting to large complex reflectors or other complex means is highly desirable.
  • US 2010/0302786 A1 discloses a lighting apparatus comprising the features of the preamble of claim 1.
  • the present invention is a multi-lens LED-array optical system and improved LED-based lighting apparatus which satisfies all of the above-noted objects and purposes.
  • An embodiment includes optical surfaces as follows: (1) a first optical surface which is a first-lens outer surface configured to refract light from the emitter; (2) a second optical surface which is a second-lens inner surface spaced from the first optical surface and having (a) a refracting portion surrounding the first optical surface and including front and back sectors configured differently from one another, and (b) a reflecting portion around the back sector, the reflecting portion positioned to receive light refracted by the back sector for total internal reflection (TIR) toward the preferential side; and (3) a third optical surface which is a second-lens outer surface configured to refract light from the second optical surface toward the preferential side.
  • TIR total internal reflection
  • the first lens is configured such that the first optical surface refracts LED-emitted light toward the preferential side.
  • the first optical surface is shaped for refraction of LED-emitted light toward the preferential side, while in others of such embodiments, the first optical surface has a centerline offset from the emitter axis toward the preferential side. In embodiments of the latter type, the first optical surface may be shaped for refraction of LED-emitted light toward the preferential side.
  • the front sector of the refracting portion of the second optical surface has a substantially smooth surface configuration extending to the juncture of the front and back sectors.
  • the back sector of the refracting portion of the second optical surface include at least a pair of surface portions transverse to each other.
  • the back sector of the refracting portion of the second optical surface includes at least a pair of surface portions transverse to each other.
  • the emitter includes an LED light source that includes a submount having an LED-populated area which has an aspect ratio greater than 1, and an array of LEDs on the LED-populated area, and the first lens is on the submount over the LED-populated area.
  • the aspect ratio may be at least about 1.25, or even at least about 1.5, and even as much as at least about 2.
  • the LED-populated area is preferably rectangular.
  • the term "LED-populated area” means an area ( i . e ., an area on the submount) the outer boundaries of which include the outermost edges of the outermost LEDs (of the LED array) in any direction.
  • the term “aspect ratio” means the ratio of the maximum cross-dimension of the LED-populated area to the maximum of the cross-dimensions orthogonal thereto.
  • emitter axis means the line orthogonal to the plane defined by the LED-populated area and passing through the geometric center of the minimum-area rectangle bounding the LED-populated area, i . e ., the center of the rectangle of minimum area which includes all of the LED-populated area.
  • Another embodiment shows a lighting apparatus for preferential-side illumination, that includes: (1) a plurality of arrays of light-emitting diodes (LEDs) spaced along a circuit board, each array having first and second maximum cross-dimensions orthogonal to one another, the first maximum cross-dimension being greater than the second maximum cross-dimension, and each LED array defining a light-emission axis; (2) a plurality of first lenses each over a corresponding array of LEDs, each first lens having an outer surface configured to refract light from its corresponding LED array; and (3) a plurality of second lenses each spaced over a corresponding one of the first lenses, each second lens having (a) an inner surface configured to direct light toward the preferential side from its corresponding first-lens outer surface, and (b) an outer surface configured to refract light toward the preferential side from the inner surface.
  • LEDs light-emitting diodes
  • each first lens preferably refracts LED-emitted light toward the preferential side.
  • each first lens is shaped for refraction of LED-emitted light toward the preferential side.
  • the outer surface of each first lens has a centerline offset from the corresponding light-emission axis toward the preferential side; in these embodiments, the outer surface of the first lens directs LED-emitted light toward the preferential side.
  • each first lens be overmolded over its corresponding LED array, forming what is sometimes referred to as an LED package.
  • the plurality of LED arrays are mounted on a common submount. In certain other embodiments, LED array is on a submount and each of the submounts is mounted on the circuit board.
  • the plurality of second lenses are portions of a one-piece lensing member.
  • the spacing and arrangement of the LEDs on each LED-populated area may be such that the total LED area is at least about one-third of the LED-populated area. More specifically, the spacing and arrangement of the LEDs may be such that the total LED area is at least about two-thirds of the LED-populated area, or even as much as at least about 90% of the LED-populated area.
  • total LED area means the sum of the submount areas immediately beneath each of the LEDs of the LED array.
  • the spacing between LEDs of the array is no more than about 1 millimeter (mm), or as little as no more than about 0.5 mm, or in some cases no more than about 0.1 mm. In some instances, the spacing is no more than about 0.075 mm, and even no more than about 0.05 mm.
  • FIG. 1 Another embodiment shows a lighting apparatus comprising (1) a plurality of arrays of light-emitting diodes (LEDs) spaced along a circuit board, each array having first and second maximum cross-dimensions orthogonal to one another, the first maximum cross-dimension being greater than the second maximum cross-dimension, and each LED array defining a light-emission axis; (2) a plurality of first lenses each over a corresponding array of LEDs, each first lens having an outer surface configured to refract light from its corresponding LED array; and (3) a plurality of second lenses each spaced over a corresponding one of the first lenses, each second lens having an inner surface and an outer surface which is configured to refract light from the inner surface.
  • LEDs light-emitting diodes
  • the plurality of LED arrays may be mounted to a submount, each to a common submount or, more particularly, each LED on its own submount, with each of the submounts being mounted on the circuit board.
  • each first lens may be overmolded over each LED array.
  • the plurality of second lenses may be portions of a one-piece lensing member.
  • the first lens will have an outer surface configured to direct LED-emitted light toward the preferential side.
  • Still other embodiments show a lighting apparatus including (1) a plurality of arrays of LEDs spaced along a circuit board, each array having first and second maximum cross-dimensions orthogonal to one another, the first maximum cross-dimension being greater than the second maximum cross-dimension, and each LED array defining a light-emission axis; and (2) a plurality of lenses each over a corresponding array of LEDs, each lens having an outer surface configured to refract light from its corresponding LED array.
  • a lighting apparatus including (1) an LED light source including a submount having an LED-populated area which has an aspect ratio greater than 1, the LED-populated area having an array of LEDs thereon, (2) a first lens on the submount over the LED array and having an outer surface configured to refract light from the LED array, and (3) a second lens spaced over the first lens, the second lens having an inner surface and an outer surface which is configured to refract light from the inner surface.
  • FIG. 1 Another embodiment shows a lighting apparatus for preferential-side illumination, the apparatus including an LED light source with an axis and having an asymmetric primary lens over the LED light source and an asymmetric secondary lens spaced over the primary lens.
  • asymmetric refers to a lens shape which is not rotationally symmetric about any axis perpendicular to its base plane.
  • Types of asymmetric lenses include without limitation bilaterally symmetric lenses.
  • FIGURES 1-26 illustrate a multi-lens LED-array optical system of an improved LED-based lighting apparatus.
  • FIGURE 1 shows lighting apparatus 10 for illumination toward a preferential side 2 from an LED light emitter 20 having an axis 21.
  • Lighting apparatus 10 has a first lens 30 over emitter 20 and a second lens 40 over first lens 30.
  • the first lens is also sometimes referred to as a "primary" lens; and the second lens is also sometimes referred to as a "secondary" lens.
  • Lighting apparatus 10 includes a first optical surface 31, a second optical surface 50 and a third optical surface 43.
  • First optical surface 31 is an outer surface 32 of first lens 30 and is configured to refract light from emitter 20.
  • Second optical surface 50 is an inner surface 41 of second lens 40.
  • Second optical surface 50 is spaced from first optical surface 31 and has a refracting portion 51 and a reflecting portion 54, as best seen in FIGURES 1 , 2 , 13 and 14 and 19-25.
  • FIGURES 1 , 2 and 19 best show refracting portion 51 surrounding first optical surface 31 and including front sector 52 and back sector 53 configured differently from one another.
  • Reflecting portion 54 is around back sector 53 and is positioned to receive light refracted by the back sector 53 for total internal reflection (TIR) toward the preferential side 2.
  • TIR total internal reflection
  • third optical surface 43 is a second-lens outer surface 42 configured to refract light from second optical surface 50 toward the preferential side 2.
  • FIGURES 1-7 illustrate first lens 30 as configured such that first optical surface 31 refracts LED-emitted light toward preferential side 2.
  • FIGURES 1-5 show first optical surface 31 shaped for refraction of LED-emitted light toward the preferential side 2.
  • FIGURES 3-7 show first optical surface 31 having a centerline 33 offset from emitter axis 21 toward preferential side 2.
  • FIGURES 1-5 show LED emitters 20 which have both first optical surface 31 having its centerline 33 offset from emitter axis 21 toward preferential side 2 and also being shaped for refraction of LED-emitted light toward preferential side 2.
  • FIGURES 1 , 13 , 14 and 19 best illustrate that front sector 52 of refracting portion 51 of second optical surface 50 has a substantially smooth surface configuration extending to juncture 55 of front and back sectors 52 and 53. It is also seen in these FIGURES that back sector 53 includes a pair of surface portions 53a and 53b transverse to each other.
  • FIGURES 3-12 show that emitter 20 includes an LED light source that includes a submount 22 having an array of LEDs 24 on an LED-populated area 23 which has an aspect ratio greater than 1.
  • LED-populated area 23 also has a first maximum cross-dimension 15 and a second maximum cross-dimension 16 orthogonal to one another, first maximum cross-dimension 15 being greater than second maximum cross-dimension 16.
  • FIGURES 3 and 4 best show first lens 30 on submount 22 and overmolded over LED-populated area 23.
  • FIGURES 5-12 and 27 illustrate various configurations of LED-populated areas 23a-h with aspect ratios of at least about 1.25, at least about 1.5 and at least about 2.
  • FIGURES 3-6 show LED emitter 20a including rectangular LED-populated area 23a with eight LEDs 14 arranged in two rows of four LEDs 14 in each row. In FIGURE 6 , dimensions are indicated in millimeters in brackets, the first maximum cross dimension being [2.08], i . e ., 2.08 millimeters, and are indicated in inches under the brackets.
  • FIGURE 12 shows LED emitter 20g including forty-eight LEDs 14 arranged in four rows of twelve LEDs 14 in each row. The aspect ratios of LED-populated area 23a is about 2 and aspect ratio of LED-populated area 23g is about 3.
  • FIGURES 7 and 8 illustrate LED arrays 23b and 23c with LEDs 14 arranged in asymmetric configurations each having aspect ratio greater than 1.
  • FIGURE 27A illustrates an example of outer boundaries of LED-populated area 23h.
  • FIGURE 27B is an exemplary illustration of two orthogonal maximum cross-dimensions for the purpose of determination of an aspect ratio of a particular LED-populated area 23.
  • FIGURE 27B is also an exemplary illustration of a position of emitter axis 21 passing through geometric center 21a of minimum-area rectangle 21b bounding LED-populated area 23.
  • FIGURES 6-10 also show that the spacing and arrangement of the LEDs 14 on each LED-populated area 23 is such that the total LED area is at least about one-third of LED-populated area 23, as seen in FIGURES 8 and 27 .
  • the spacing and arrangement of the LEDs 14 are such that the total LED area is at least about two-thirds of LED-populated area 23b.
  • the spacing and arrangement of the LEDs 14 are such that the total LED area is at least about 90% of LED-populated areas 23a, 23d and 23e.
  • FIGURE 8 shows the spacing between LEDs 14 of array 24c is about 0.1 mm.
  • the spacing between LEDs 14 of array 24a is about 0.075 mm.
  • the spacing between LEDs 14 of array 24d is about 0.05 mm.
  • FIGURE 2 further illustrates another aspect of this invention which is lighting apparatus 100 which includes a plurality of LED arrays 24 spaced along a circuit board 11, a plurality of first lenses 30 each over a corresponding LED array 24, and a plurality of second lenses 40 each spaced over a corresponding one of first lenses 30.
  • FIGURE 2 also shows each first lens configured to refract LED-emitted light toward preferential side 2 with outer surface 32 of each first lens 30 being shaped for refraction of LED-emitted light toward preferential side 2, as best shown in FIGURES 3 and 4 , and having centerline 33 offset from corresponding light-emission axis 21 toward preferential side 2, as shown in FIGURES 4-6 .
  • each of LED emitters 20 is in the form of what is sometimes referred to as an LED package which includes LED array 24 on submount 22a and first lens 30 overmolded on submount 22a over its corresponding LED array 24.
  • FIGURE 2 further shows each of submounts 22a mounted on circuit board 11.
  • FIGURE 11 illustrates a plurality of LED arrays 24 mounted on a common submount 22 and a plurality of first lenses 30 overmolded on submount 22 over a respective one of LED arrays 24.
  • FIGURES 2 and 13-18 show the plurality of second lenses as portions of a one-piece lensing member 44.
  • One-piece lensing member 44 including a set of alignment protrusions 45 extending from a circuit-board-adjacent surface 46 of lensing member 44, best seen in FIGURES 2 , 13 and 14 .
  • circuit board 11 has a set of alignment holes formed in an LED-supporting surface 13 of circuit board 11 complementary to set alignment protrusions 45. Alignment protrusions 45 and alignment holes are engaged to accurately align secondary lenses 40 over their corresponding primary lenses 30.
  • protrusions 45 are first and second protrusions 451 and 452 extending from a circuit-board-adjacent surface 46 of lensing member 44, and that alignment holes defined by circuit board 11are first and second holes 121 and 122.
  • First hole 121 is complementary in shape to first protrusion 451 to fix the position of lensing member 44 along circuit board 11.
  • Second hole 122 receives second protrusion 452 to prevent rotation of lensing member 44 about first protrusion 451.
  • Second 122 hole is elongate along a line extending between first and second holes 121 and 122 which facilitates engagement of the alignment features 45 and 121.
  • FIGURES 20-26 illustrate an alternative embodiment of lighting apparatus 10b which includes a hemispheric primary lens 30b and a separate-piece secondary lens 410 configured for refracting light from primary lens 30 toward preferential side 2 and creating an asymmetric illumination pattern such as type III or type IV light distribution patterns used for roadway lighting, as established by The Illumination Engineering Society (IES).
  • Lens 410 has an inner surface 41b spaced from first optical surface 31b and has a refracting portion 51b and a reflecting portion 54b.
  • FIGURES 20 and 22 best show refracting portion 51b surrounding first optical surface 31b and including front sector 52b and back sector 53b configured differently from one another. Reflecting portion 54b is around back sector 53b.
  • FIGURES 24-26 illustrate that reflecting portion 54b is positioned to receive light refracted by the back sector 53b for total internal reflection (TIR) toward outer surface 42b. It is seen in FIGURES 20 , 24-26 that outer surface 42b is configured to further direct light from inner surface 41b toward preferential side. Lens 410 is described in more detail in the parent Application Serial No. 12/475,194, filed May 29, 2009 .
  • FIGURES 1 and 19 best illustrate lighting apparatus 10 for preferential-side illumination with first lens 30 configured to direct LED-emitted light toward preferential side 2 and second lens 40 configured to further direct the light toward preferential side 2.
  • first (or primary) lens 30 and second (or secondary) lens 40 are shown as having asymmetric shapes with preferential direction being a one side direction with respect to emitter axis 21.
  • FIGURES 28-36 illustrate yet another alternative embodiment of lighting apparatus 10c with a separate-piece secondary lens 411 configured for directing a majority of light from primary lens 30c into an elongate distribution 3 with some lateral light along the sides of elongate distribution 3, as illustrated in FIGURES 34-36 , such that preferential side 2a are opposite sides along a longitudinal axial plane extending through emitter axis 21 and creating an non-rotationally symmetric elongate illumination pattern which is bilaterally symmetric in two main orthogonal directions.
  • the illumination pattern produced by lens 411 is useful for tall elongate passageways such as warehouse aisles.
  • Lens 411 has an inner surface 41c spaced from primary lens surface 30c and has a refracting surface portion 51c and a reflecting surface portion 54c.
  • FIGURES 28, 29 and 31 best show refracting portion 51c surrounding primary lens 30c and including front and back portions 52c and a pair of opposite lateral portions 53c, front and back portions 52c being substantially orthogonal to and extending between lateral portions 52c.
  • Reflecting portion 54c substantially surrounds refracting surface portion 51 c.
  • FIGURES 32 and 33 illustrate that reflecting portion 54c is positioned to receive substantially all forward and rearward light (best shown in FIGURE 32 ) and a portion of lateral light (best shown in FIGURE 33 ).
  • Reflective surface portion 54c is configured for total internal reflection (TIR) of the received light toward outer surface 42c. It is also seen in FIGURES 32 and 33 that outer surface 42c receives light from refracting inner surface 51c and from reflecting surface 54c and forms elongate light distribution 3 (shown in FIGURES 34-36 ) by refracting such received light.
  • Lens 411 is described in more detail in Application Serial No. 13/408,882, filed February 29, 2012 .

Claims (15)

  1. Appareil d'éclairage (10) destiné à un éclairage d'un côté préférentiel (2), ledit appareil (10) comprenant un émetteur de lumière à DEL (20) ayant un axe (21) qui est une ligne orthogonale à un plan défini par l'émetteur de lumière à DEL (20) et qui passe par le centre géométrique d'une zone de l'émetteur dans le plan, ledit appareil (10) comprenant :
    - une première lentille (30) sur l'émetteur à DEL (20), conçue pour diriger, de préférence, une lumière émise par une DEL vers le côté préférentiel (2) ; et
    - une seconde lentille (40) espacée de et placée sur la première lentille (30), et conçue pour diriger en outre, de préférence, la lumière vers le côté préférentiel (2) ;
    caractérisé en ce que la première lentille (30) présente une ligne centrale (33) qui est décalée par rapport à l'axe (21) de l'émetteur vers le côté préférentiel (2).
  2. Appareil d'éclairage (10) selon la revendication 1, dans lequel la première lentille (30) présente une surface externe (32) conçue pour diriger une lumière émise par une DEL vers le côté préférentiel (2).
  3. Appareil d'éclairage (10) selon la revendication 1, dans lequel la seconde lentille (40) comprend :
    - une surface interne (41) conçue pour diriger, de préférence, une lumière provenant de la surface externe (32) de la première lentille (30) ;
    - une surface externe (42) conçue pour diriger une lumière provenant de la surface interne (41) vers le côté préférentiel (2).
  4. Appareil d'éclairage (10) selon la revendication 3, dans lequel la surface interne (41) de la seconde lentille (40) comprend :
    - une portion réfractrice (51 ; 51b) entourant la première lentille (30) et comprenant des secteurs avant et arrière (52, 53 ; 52b, 53b) ; et
    - une portion réfléchissante (54 ; 54b) autour du secteur arrière (53 ; 53b), la portion réfléchissante (54 ; 54b) étant positionnée de manière à recevoir la lumière réfractée par le secteur arrière (53 ; 53b) pour assurer une réflexion interne totale (TIR) vers le côté préférentiel (2).
  5. Appareil d'éclairage (10) selon la revendication 4, dans lequel le secteur arrière (53 ; 53b) de la portion réfractrice (51 ; 51b) de la seconde lentille (40) comprend au moins une paire de portions de surface (53a, 53b) mutuellement transverses.
  6. Appareil d'éclairage (10) selon la revendication 5, dans lequel le secteur avant (52 ; 53b) de la portion réfractrice (51 ; 51b) de la seconde lentille (40) présente une configuration de surface lisse qui s'étend jusqu'à la jonction (55) des secteurs avant et arrière (52, 53 ; 52b, 53b).
  7. Appareil d'éclairage (10) selon la revendication 4, dans lequel la portion réfractrice (51 ; 51b) de la surface interne (41) de la seconde lentille (40) comprend des secteurs avant et arrière (52, 53b) configurés différemment l'un de l'autre.
  8. Appareil d'éclairage (10) selon la revendication 1, dans lequel :
    - l'émetteur (20) comprend une source de lumière de DEL qui comprend une embase (22) qui présente une zone peuplée de DEL (23) qui possède un rapport de format supérieur à 1, et un réseau de DEL (24) sur la zone peuplée de DEL (23) ; et
    - la première lentille (30) se trouve sur l'embase (22) sur la zone peuplée de DEL (23).
  9. Appareil d'éclairage (10) selon la revendication 8, dans lequel la zone peuplée de DEL (23) est rectangulaire.
  10. Appareil d'éclairage (10) selon la revendication 8, dans lequel la première lentille (30) est surmoulée sur l'embase (22).
  11. Appareil d'éclairage (10) selon la revendication 1, comprenant en outre :
    - une pluralité de diodes électroluminescentes (DEL) (24) espacées le long d'une carte de circuit imprimé (11), chaque réseau (24) ayant des première et seconde dimensions transversales maximum (15, 16) orthogonales l'une par rapport à l'autre, la première dimension transversale maximum (15) étant supérieure à la seconde dimension transversale maximum (16), et chaque réseau DEL (24) définissant un axe (21) d'émission de la lumière ;
    - une pluralité de premières lentilles (30) chacune sur un réseau correspondant de DEL (24), chaque première lentille (30) présentant une surface externe (32) conçue pour réfracter la lumière provenant de son réseau de DEL (24) correspondant ; et
    - une pluralité de secondes lentilles (40) chacune espacée de, et sur l'une, correspondante, des premières lentilles (30), chaque seconde lentille (40) présentant une surface interne (41) et une surface externe (42) qui est conçue pour réfracter la lumière provenant de la surface interne (41).
  12. Appareil d'éclairage (10) selon la revendication 11, dans lequel la pluralité de réseaux de DEL (24) sont montés sur une embase (22) commune.
  13. Appareil d'éclairage (10) selon la revendication 11, dans lequel chaque réseau de DEL (24) se trouve sur une embase (22) et chacune des embases (22) est montée sur la carte de circuit imprimé (11).
  14. Appareil d'éclairage (10) selon la revendication 11, dans lequel chaque première lentille (30) est surmoulée sur chaque réseau de DEL (24).
  15. Appareil d'éclairage (10) selon la revendication 14, dans lequel chaque première lentille (30) présente une surface externe (32) conçue pour diriger la lumière émise par une DEL vers le côté préférentiel (2).
EP13772520.6A 2012-04-06 2013-04-04 Système optique à réseau de del multilentilles Active EP2834556B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13/441,540 US9255686B2 (en) 2009-05-29 2012-04-06 Multi-lens LED-array optic system
PCT/US2013/035287 WO2013152199A1 (fr) 2012-04-06 2013-04-04 Système optique à réseau de del multilentilles

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EP2834556A1 EP2834556A1 (fr) 2015-02-11
EP2834556A4 EP2834556A4 (fr) 2015-12-23
EP2834556B1 true EP2834556B1 (fr) 2017-08-02

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