EP3165818B1 - Innen- oder aussenleuchte, insbesondere strassenleuchte, mit verlagerbarer freiformlinse - Google Patents

Innen- oder aussenleuchte, insbesondere strassenleuchte, mit verlagerbarer freiformlinse Download PDF

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Publication number
EP3165818B1
EP3165818B1 EP16196994.4A EP16196994A EP3165818B1 EP 3165818 B1 EP3165818 B1 EP 3165818B1 EP 16196994 A EP16196994 A EP 16196994A EP 3165818 B1 EP3165818 B1 EP 3165818B1
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EP
European Patent Office
Prior art keywords
lens
free
led
lenses
light distribution
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
EP16196994.4A
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German (de)
English (en)
French (fr)
Other versions
EP3165818A1 (de
Inventor
Janusz Teklak
Timo Eichele
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siteco GmbH
Original Assignee
Siteco Beleuchtungstechnik GmbH
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Publication date
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Application filed by Siteco Beleuchtungstechnik GmbH filed Critical Siteco Beleuchtungstechnik GmbH
Publication of EP3165818A1 publication Critical patent/EP3165818A1/de
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Classifications

    • 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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/06—Controlling the distribution of the light emitted by adjustment of elements by movement of 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
    • F21V5/08—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
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/02—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages with provision for adjustment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/10—Outdoor lighting
    • F21W2131/103—Outdoor lighting of streets or roads
    • 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
    • F21Y2101/00—Point-like light sources

Definitions

  • the invention relates to a luminaire for stationary indoor or outdoor lighting, in particular a street lamp, with at least one LED (light emitting diode, including an OLED, organic light emitting diode, is to be understood) and a free-form lens, which is associated with the LED.
  • LED light emitting diode, including an OLED, organic light emitting diode, is to be understood
  • free-form lens which is associated with the LED.
  • LEDs are increasingly being used as lamps because of the advantages in terms of energy savings and longevity.
  • the near-point light sources require a modified compared to conventional bulbs optical device to achieve a desired light distribution of the lamp for the given application.
  • LEDs also use a reflector technique.
  • the point-shaped light images of the LEDs which can be arranged in combined arrays, distributed on a surface of the reflector. This can also reduce the glare.
  • a disadvantage of this reflector technique is that when individual LEDs fail, a change in the light distribution curve can result and thus a deterioration of the illumination uniformity and the illumination level occurs.
  • Another possibility of light control is the spatial distribution of the LEDs on curved surfaces.
  • the failure of individual LEDs has a change in the desired light distribution result.
  • the support elements of the LEDs must be adapted to the spatial distribution of the LEDs.
  • light-directing lenses on individual or multiple LEDs forms another possibility of generating a defined light distribution on a use plane, such as on one of the road.
  • individual LEDs on a LED carrier lenses are assigned. If several LEDs with associated lenses have the same spatial arrangement, the failure of individual LEDs has only a very small influence on the produced light distribution.
  • the lens solution is relatively expensive because the lenses need to be made specifically for the lighting task.
  • free-form lenses must be developed individually.
  • the respective lamp is only suitable for a specific lighting task.
  • Another way to change the light distribution of a luminaire is to move an auxiliary lens parallel to the optical axis of the lamp to focus or defocus a rotationally symmetric light distribution. As a result, however, few variations of light distributions can be generated.
  • US 2008/0273324 A1 It is proposed to laterally rotate a matrix of respectively circular-symmetrical lenses relative to a matrix of LEDs. As a result, an oval-shaped light distribution can be generated from a circular light distribution of the luminaire.
  • the possibilities of influencing the light distribution by displacing the lens are very limited.
  • US 2010/172135 A1 discloses an LED device having one or more lenses for generating a desired light distribution, eg, a light distribution for illuminating a street. It is contemplated that each lens on an LED may be individually rotated to produce a desired light distribution.
  • the US 2005/018434 A1 discloses a lighting device with one or more LEDs according to the preamble of claim 1.
  • Object of the present invention is to develop a luminaire for fixed illumination of indoor or outdoor areas, in particular a street lamp, which can be inexpensively adapted to the respective lighting task.
  • the object is achieved by a lamp for indoor or outdoor lighting, in particular a street lamp, according to claim 1.
  • At least one free-form lens i. with non-rotationally symmetrical profile, and the LED against each other displaced.
  • the lens relative to the LED can be moved, the LED is mounted stationary on the lamp.
  • the LED can be moved relative to a stationary lens mounted in the luminaire.
  • the displaceability makes it possible to arrange the lens and the LED in at least two different positions relative to one another, wherein the displacement between the two positions comprises at least one movement perpendicular to the main emission direction of the lens.
  • the light distribution of the luminaire can be changed much more flexibly than is possible, for example, by a displacement of a lens along the optical axis of the LED.
  • the free-form lens generates different light distributions in the at least two or more different positions which, for example, are adapted to the illumination requirement of a street lamp, as explained in more detail below.
  • the relative to the LED lateral displacement of a non-rotationally symmetrical freeform lens Due to the deviation from the rotational symmetry, the light distribution of the lens is already adapted to a lighting task and by moving the lens, the light distribution can be changed more.
  • two distinct maxima may be generated arranged on a common axis, eg along a road illuminated by the luminaire (ie in the directions of the C0 / 180 plane).
  • Such a light distribution is suitable for illuminating a street with several lights, the longitudinal distribution helps to be able to choose the mast spacing for the street lights relatively large.
  • the maxima may be symmetrical to the C90 / C270 plane, which is transverse to the road axis.
  • This Lichtbandknickung is preferred to illuminate a street with a lamp from the roadside or an adjacent walking and / or track over a longitudinal section as evenly as possible.
  • the lens In order to produce this light band buckling, the lens must redirect much of the light from the light source at the angle of the light band buckling. This can be realized, for example, according to an embodiment with a convex geometry in an inner cavity of the free-form lens or with a convex geometry on the outer surface of the lens.
  • a similar effect can also be achieved by a prismatic structure on the inner cavity and / or the outer surface to focus light in the desired direction, or by differences in refractive index within the lens to produce refraction in the appropriate desired direction. It is also possible to provide a plurality of cavities with or without prism structure in a lens. For example, each of the cavities may be associated with one of the LEDs. It is also possible to arrange a plurality of LEDs within a cavity.
  • the angle of the light band buckling between the two positions is changed by the displacement of the lens.
  • the free-form lens has a plane of symmetry in a C plane, preferably the C90 / C270 plane, and the relative movement takes place along a direction in the plane of symmetry.
  • This embodiment is particularly suitable for illuminating straight roads.
  • a deviation from the mirror symmetry in the C90 / C260 plane may also be advantageous in order to achieve a uniform illumination on the road section.
  • the displaceability of the lens allows an individual adaptation to the location of the lamp, for example the distance to the roadside and the height of the lamp post.
  • the lamp has a plurality of LEDs and each LED is associated with a free-form lens. This not only serves to produce a larger illuminance, but also has the advantage that the LEDs can act redundantly, so that in case of failure of an LED lighting task is only guaranteed with reduced overall intensity.
  • the freeform lenses are displaceable relative to the LEDs by a common relative movement. As a result, all lenses can be adjusted to produce the desired light distribution with one movement.
  • the individual free-form lenses are individually displaced relative to the respective associated LED. As a result, different light distributions can be generated with the individual lens-LED pairs, which overlap to a desired overall light distribution of the luminaire.
  • the freeform lenses can be shaped identically, so that with the relative movement, all the lenses also produce the same light distribution in each case.
  • the several same freeform lenses are each arranged in the same position relative to the LEDs assigned to them.
  • all the lens-LED pairs in the luminaire each achieve the same light distribution, which overlap each other with the same spatial orientation. If one LED fails, this does not change the total light distribution generated by the luminaire.
  • some free-form lenses along an axis, in particular in the direction of the relative movement, offset from their respective associated LEDs can be arranged.
  • the individual lens-LED pairs can have different light distributions, e.g. produce different Lichtbandknickitch, which overlap in the total light distribution of the luminaire. So new light distribution curves can be generated. By moving the lenses relative to the LEDs, this light distribution can also be adjusted individually.
  • each of the freeform lenses can each generate a light band buckling at the same angle.
  • the freeform lenses of different LEDs it is also possible for the freeform lenses of different LEDs to produce different light band bends. Either the lenses are arranged differently with respect to the LEDs or the lenses have a different shape to produce a changed angle of the light band buckling.
  • the plurality of LEDs are arranged in a plane or arranged along a straight axis and the lenses are arranged to be displaceable in an array parallel to the plane or parallel to the axis.
  • the light distributions of the individual lens-LED pairs are uniformly superimposed in the at least two different positions, so that the symmetry of the overall light distribution achieved when adjusting the lenses the LEDs remains.
  • a plurality of free-form lenses are arranged on a common lens carrier and the lens carrier can be displaced by the relative movement with respect to the LEDs.
  • the embodiment with a plurality of LEDs and a plurality of freeform lenses can be produced particularly easily.
  • the operation for adjusting the lamp is easy, because only one lens carrier has to be moved relative to the LEDs.
  • individually individual free-form lenses or groups of free-form lenses can be adjusted relative to the respectively assigned LED (s).
  • the lens carrier can be manufactured together with the freeform lens or as a separate component.
  • the freeform lenses can be formed from a transparent plastic such as PMMA.
  • the lens carrier may be made of the same plastic material or another, e.g. non-transparent, plastic material may be formed, and made with the lenses in one piece or separately.
  • a lens carrier has a single free-form lens or a lens carrier for a plurality of free-form lenses at least one, preferably two opposing reflective side walls facing towards the one or more LEDs.
  • the reflective sidewall increases the efficiency of the luminaire.
  • the at least one or preferably the two side walls are / are arranged parallel to a plane of symmetry of the light distribution which generates the luminaire in one or both positions of the free-form lens (s) relative to the LED (s).
  • this arrangement of the side walls has no influence on the light distribution curve. But it can be dispensed with large beam angle to the side and thus on large designs of the lamp, because the light is mirrored without affecting the light distribution over the side wall.
  • the displaceability of the lenses relative to the LED can be done manually or automatically. Due to the manual displaceability, the desired light distribution at the place of installation of the lamp can still be adjusted. In an automatic displacement such as an electric servomotor or the like, the light distribution of the lamp can still be changed after installation.
  • the light can have different light distributions at daytime and at night, or the light distribution can be adapted to the weather situation and the reflection or absorption properties of the road surface.
  • the luminaire interacts with a transmitter in a vehicle, so that the light distribution in an approaching vehicle is automatically changed in order, for example, to change the light distribution. to prevent dazzling the driver by the street lamp.
  • An LED 1 is arranged on a carrier, in particular a PCB (prited circuit board) 5 and fixedly mounted in a lamp housing (not shown).
  • a free-form lens 2 made of glass or one transparent plastic such as PMMA, PU or silicone arranged.
  • the LED 1 is arranged within a cavity 10 of the freeform lens 2.
  • the cavity 10 has, as in the FIGS. 2a and 3a it can be seen a convex geometry, which causes light of the LED 1, as indicated by the light beams L1, L2 and L3, broken.
  • the free-form lens 2 is mounted with respect to the PCB 5 with the lens 1 slidably.
  • the direction 4 of the sliding movement lies in a C90 / 270 plane of the luminaire.
  • the illustrated embodiment is provided in particular for generating a light distribution for a street lighting.
  • the convex geometry 9 of the inner cavity 10 provides a light distribution curve, which produces two pronounced maxima in a horizontal section of the C-planes, the so-called cone-shaped curve.
  • the maxima are symmetrical with respect to the C90 / 270 plane and arranged at an angle 11 with respect to the C0 / 180 plane in order to form a light band buckling.
  • the angle of Lichtbandknickung 11 is only about 5 °. This configuration is suitable for illuminating a relatively narrow street, as in FIG. 2b indicated.
  • the light band buckling makes it possible to position the light 8 at the side of the road and to illuminate the road relatively evenly over a large longitudinal section.
  • the angle 11 of the light band buckling changes.
  • FIG. 3b is at the shifted lens 2, the angle 11 of the light band buckling about 30 °. This configuration is particularly suitable for illuminating a wider street, as in FIG. 3b is shown.
  • the same light 8 by shifting the free-form lens 2 relative to the LED 1 along the direction 4, ie in the C90 / 270-level, generate different light distributions with a modified Lichtbandknickung 11 and thus adapted for lighting different widths streets.
  • all arrangements can be illuminated in accordance with standards between very narrow and very wide streets.
  • different overhangs of the luminaire with respect to the roadside in positive or negative direction can be compensated by the displacement of the lens 2.
  • the light distribution curve can also be adapted to curvy roads with the angle of the light band bend.
  • the FIG. 4 shows a further possibility for generating a desired light distribution through different lens positions 19, 20, 21 of three LEDs 1 within a light 8.
  • the free-form lenses 2 in this embodiment are each identical to the previously described free-form lens 2. Inside the light 8, however, are three LEDs 1 and the three free-form lenses 2 are arranged in three different positions along the displacement direction x in the C90 / 270 plane with respect to their respectively associated LED 2. Due to the three different positions 19, 20 and 21 result in three different cone envelope curves 22, 23 and 24, which in the FIG. 4b are shown. These light distributions are superimposed to form an overall cone envelope curve 25. In this embodiment, the free-form lenses 2 can be moved individually relative to the LEDs.
  • a superimposition of the light distribution with different light band buckling can be generated by different displacement paths of the lenses and thus new light distribution curves are generated.
  • a field of application is, for example, the lighting of squares. Due to the superimposition of the light band bends at different lens positions in the luminaire 8, there is no longer any special angle in the light band bending of the light distribution curve 25.
  • the total light distribution 25 is suitable in addition to wide streets for the illumination of places or areas that have a greater depth in the direction of the C90 / 270 level.
  • FIG. 5 shows a structure of a sliding free-form lens 2 on a PCB 5 according to a possible embodiment.
  • the free-form lens 2 is held by a lens carrier 12 which is fixedly connected to the PCB 5, above the LED 1.
  • the lens 2 is slidably disposed within the lens carrier 12, so that the lens 2 along the direction 4 above the LED (in FIG. 5 hidden) can be moved continuously.
  • a mark 14 on the lens carrier 12 and an opposite mark on the lens 2, the position of the lens relative to the LED 1 can be read.
  • Each position of the lens 2 corresponds to a predefined light distribution, which defines an angle in a light band buckling in the example.
  • the lens 2 can be manually displaced in the direction 4 against the resistance which the groove structure 13 exerts on the lens. According to an alternative, however, it may be provided in these and also in the other embodiments that the lens 2 is fully automatically displaceable by a sensor control (eg with an electric motor).
  • FIGS. 7 and 9 a lens carrier 16 is shown which can accommodate a plurality of lenses.
  • the lens wearer 16 after FIG. 7 is adapted to a plurality of individual lenses 15 according to FIG. 6 each slidably received, as previously in connection with FIG. 5 has been explained for a single lens 15.
  • it can also be provided to mount each of the individual lenses 15 firmly on the carrier 16 and to move the entire carrier 16 relative to the LEDs 1. In such a construction, with a displacement movement of the carrier 16 relative to the LEDs 1, all the individual lenses 15 can be adjusted uniformly with respect to the LEDs.
  • FIGS. 8 and 9 an embodiment is shown, in which the free-form lens are combined in an array of 1x2 lenses.
  • Two of the lens arrays 15 according to FIG. 8 are in the lens carrier 16 according to FIG. 9 inserted in the space provided 17 and can be moved together via two LEDs 1.
  • the two free-form lenses 2 of the lens array 15, which are each aligned identically to the associated LED 1, produce the same light distribution, so that these light distributions overlap identically with negligible offset. In the case of a failure of an LED, this does not change the overall light distribution of the light generated by the lens array, but only decreases in the overall intensity.
  • a lens carrier for an XxX lens array (not shown in the figure) is shown.
  • an array of any number of matrix-shaped free-form lenses 2 can be arranged and moved in two directions in a plane above the LEDs.
  • FIG. 11 shows a lens carrier 16 for four individual freeform lenses.
  • further side walls are provided which are reflective on the side facing the LEDs 18, in particular highly reflective executed.
  • the reflective sidewalls 18 are disposed parallel to the C90 / 270 plane and parallel to the plane of translation of the lenses.
  • the sidewalls have no influence on the light distribution because the reflection planes are parallel to the plane of symmetry. Due to the reflective side walls, however, the design of the lamp can be made smaller, because it can be dispensed with high radiation angle to the side.
  • FIGS. 12 and 13 Other embodiments of free-form lenses that can be used in the present invention are disclosed in U.S. Patent Nos. 4,135,355 and 4,305,837 FIGS. 12, 13 and 14 shown.
  • a prism structure 26 is provided on the freeform lens 2.
  • This prism structure can be provided both on the light entry surface, ie within the cavity 10, as in FIG FIG. 12 shown.
  • it may also be provided as in FIG. 13 illustrated to provide a prism structure 26 on the outside of the freeform lens 2.
  • the prism structure provides for a focusing arrangement, for example in the manner of a Fresnell structure, in particular to produce a Lichtbandknickung the light distribution.
  • FIG. 14 a further embodiment of a free-form lens is shown, which can also generate a Lichtbandknickung.
  • a region 27 is provided within the lens, which has a different refractive index than the surrounding region.
  • the foregoing embodiments have been described as always moving the lens relative to the LEDs.
  • mount the lenses stationary on the lamp and to move the LEDs relative to the lenses by appropriate means.
  • a plurality of LEDs may each be associated with a lens.
  • the lens carriers can be adjustable relative to the light in order to move the lenses relative to the LEDs.
EP16196994.4A 2015-11-06 2016-11-03 Innen- oder aussenleuchte, insbesondere strassenleuchte, mit verlagerbarer freiformlinse Active EP3165818B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015119106.7A DE102015119106A1 (de) 2015-11-06 2015-11-06 Innen- oder Außenleuchte, insbesondere Straßenleuchte, mit verlagerbarer Freiformlinse

Publications (2)

Publication Number Publication Date
EP3165818A1 EP3165818A1 (de) 2017-05-10
EP3165818B1 true EP3165818B1 (de) 2019-01-02

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EP (1) EP3165818B1 (zh)
CN (1) CN106969327B (zh)
DE (1) DE102015119106A1 (zh)

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BE1025877B1 (fr) 2018-01-05 2019-08-06 Schreder S.A. Luminaire a lentille mobile
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CN106969327A (zh) 2017-07-21
CN106969327B (zh) 2020-10-30
DE102015119106A1 (de) 2017-05-11

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