EP3015758A1 - Lineare beleuchtungsvorrichtung mit elektrolumineszenzdioden und linearer linse - Google Patents

Lineare beleuchtungsvorrichtung mit elektrolumineszenzdioden und linearer linse Download PDF

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Publication number
EP3015758A1
EP3015758A1 EP15191993.3A EP15191993A EP3015758A1 EP 3015758 A1 EP3015758 A1 EP 3015758A1 EP 15191993 A EP15191993 A EP 15191993A EP 3015758 A1 EP3015758 A1 EP 3015758A1
Authority
EP
European Patent Office
Prior art keywords
linear
light
lighting device
face
lens
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.)
Granted
Application number
EP15191993.3A
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English (en)
French (fr)
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EP3015758B1 (de
Inventor
Jérome Fourot
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.)
Novaday International
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Novaday International
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Filing date
Publication date
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Publication of EP3015758A1 publication Critical patent/EP3015758A1/de
Application granted granted Critical
Publication of EP3015758B1 publication Critical patent/EP3015758B1/de
Not-in-force legal-status Critical Current
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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
    • 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
    • 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
    • F21V5/00—Refractors for light sources
    • F21V5/02—Refractors for light sources of prismatic 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
    • F21V5/04—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
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/005—Reflectors for light sources with an elongated shape to cooperate with linear light sources
    • 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
    • F21Y2113/00—Combination of light sources
    • 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

  • the present invention relates to the technical field of lighting using light emitting diode (LED) light-emitting diode (LED) sources.
  • the invention relates more particularly to so-called linear LED lighting devices intended to be a substitute for lighting systems using fluorescent linear tubes with mercury vapor or other.
  • Fluorescent tube lighting such as, for example, used inside industrial buildings, especially in storage warehouses, implements luminaires fixed in height, and aligned to illuminate spans. Each luminaire then comprises one, two or three parallel linear fluorescent tubes. These inexpensive luminaires actually make it possible to produce light, but they do not make it possible to obtain satisfactory illumination at ground level or in a volume between the ground and a height of two meters, given the height at which they are generally located. , from 4 to 10 meters and how the tubes emit light on their entire periphery. Moreover, these luminaires do not make it possible to obtain an optimized electrical energy consumption and induce disturbances of the power supply networks to which they are connected because of their mode of operation and the systems used when they are switched on.
  • linear fluorescent tube luminaires are replaced by linear luminaires with light-emitting diodes.
  • each diode is associated with an individual optical system, said secondary lens which focuses and focuses the light, for example in a cone having an apex angle of about 20 ° to 30 °, so as to obtain the desired floor lighting.
  • the cover forms, in relation to each longitudinal row of light-emitting diodes, a linear lens, at least translucent, with a longitudinal axis parallel to the longitudinal axis of the body and symmetrical with respect to a sagittal plane, with a external light emitting face and an internal light receiving face of the diodes, whose transmitting face, seen in transverse cross-section, has a convex shape, and whose receiving face, seen in transverse cross-section , comprises a central convex diopter and, on either side of the central diopter, parallel prisms each having a medial and a partially flat at least lateral side face, the flat medial face portion of each prism forming with the sagittal plane an angle between 0 ° and 5 ° in absolute value, the flat portion of the side face of each prism forming with the sagittal plane an angle of between 10 ° and 70 ° in absolute value.
  • each row or array of light-emitting diodes, of such a linear lens makes it possible to obtain for each light-emitting diode a lighting cone having in a plane transverse to the axis of alignment of the diodes an angle at acute summit and for example between 20 ° and 60 °.
  • the lighting device according to the invention then makes it possible to provide a satisfactory ground lighting even when being located at a high height for example greater than 5 meters and of the order of ten meters. This without the need to implement at each light emitting diode a so-called secondary lens, ensuring a conditioning light emitted by the diode.
  • a light-emitting diode comprises a semiconductor wafer which, when subjected to a suitable potential difference, emits a blue light radiation, most often blue, which is converted into white or other light by a layer of phosphors covered, directly or associated with a light.
  • thickness of silicone, of a coating at least translucent and generally transparent forming a primary lens which comprises an outer emitting face of the light generated by the diode.
  • the primary lens of the diode most often emits light on a half-sphere.
  • the linear lens according to the invention allows, without individual secondary lens, to concentrate in a transverse plane the light emitted by the lighting device.
  • each light-emitting diode of the lighting device is devoid of individual secondary lens of concentration of the light.
  • a material or an object is translucent if it allows the light coming from a reception face to pass towards an emission face and beyond this without the elements situated on the the receiving face are visible, clearly distinguishable or identifiable. Still within the meaning of the invention, a material or an object is transparent if it allows the light coming from a reception face to pass towards an emission face and beyond this and the elements situated on the side of the receiving face are perfectly visible, clearly distinguishable or identifiable.
  • an at least translucent object or material is an object or material capable of having one or more gradations in the way in which it passes light or diffuses it between what would describe it as translucent and what would describe it as transparent.
  • the sagittal plane is a plane substantially parallel to the longitudinal axis of the row of diodes and parallel to the emission axes of the light emitting diodes or primary lenses thereof.
  • the depth of the grooves separating the prisms situated on the same side of the plane increases away from the sagittal plane, two consecutive prisms being separated by a longitudinal groove delimited by the lateral face of the plane. a prism and the medial face of the adjacent prism, the depth of the groove being measured between, on the one hand, a plane tangent to the apices of the two prisms delimiting the groove and, on the other hand, a plane tangent to the bottom of said groove.
  • the bottoms of the grooves are located on a curve which has a radius of curvature greater than or equal to 5 mm and whose concavity is oriented towards the light-emitting diodes.
  • the apices of the prisms are situated on a curve having a radius of curvature greater than or equal to 3 mm and whose concavity is oriented towards the light-emitting diodes.
  • each diode comprises a primary lens associated with a convex or plane emission face and the apex of each emission face of each diode is located at a distance from the top of the central diopter less than or equal to 6 mm and preferably between 1 mm and 4 mm.
  • the emission face of the linear lens has a radius of curvature greater than or equal to 8 mm.
  • the body comprises in the lighting chamber, in relation to each longitudinal row of light-emitting diodes, two planar reflectors extending parallel to the longitudinal axis of the body being located on both sides of the body. water from the receiving surface and forming, with each other, an angle of between 90 ° and 160 °.
  • the use of such reflectors makes it possible to increase the luminous efficiency of the lighting device according to the invention.
  • the apex of the primary lens of each diode is located between a plane passing through the lateral edges of the reflectors and a plane tangent to the top of the central diopter.
  • the apex of the primary lens of each diode is located between a plane passing through the vertices of the extreme lateral prisms and a plane tangent to the apex of the central diopter. This characteristic also makes it possible to optimize the concentration of light by the linear lens.
  • each linear lens has a measured thickness, between a plane tangential to the top of the central diopter and a plane tangential to the top of the emission face, greater than 1 mm and, preferably, between 2 mm and 6 mm.
  • each linear lens comprises at least three prisms on either side of the central diopter.
  • the body is made of metal.
  • a metal body ensures good evacuation of the heat generated by the light emitting diodes and their power supply.
  • the body is made in the form of a profile obtained by means of a die without this excluding the possibility of making the body in any other suitable manner, for example by folding.
  • the linear lighting device comprises several longitudinal rows of light emitting diodes parallel and distant from each other, each row being associated with a longitudinal lens.
  • the sagittal planes of the longitudinal linear lenses form acute angles with each other.
  • a lighting device according to the invention may be qualified linear lighting device insofar as it has one or more rows of light-emitting diodes, each row can be likened to a linear source of illumination.
  • a linear lighting device according to the invention generally has a length very much greater than the width of the lighting device without the invention excluding an embodiment of the lighting device in which it has a width very close to its width. length by the implementation of a sufficient amount of row of light emitting diodes.
  • the linear qualifier is nonetheless relevant insofar as it relates to the alignment direction of the rows of light-emitting diodes.
  • the linear lighting device 1 comprises an elongate body 2 which extends along a longitudinal axis L.
  • the elongated body 2 defines at least one receiving surface 3 of at least one substrate 4 carrying at least one row R of light-emitting diodes 5 according to the illustrated example, the elongated body 2 comprises a single receiving surface 3 which is substantially centered with respect to the elongate body 2 and on which is fitted a single substrate 4 carrying a single row R of diodes 5.
  • the substrate 4 may, for example, comprise a printed circuit board, abbreviated PCB for English "printed circuit board", on which the light emitting diodes 5 are soldered. Of course, the substrate 4 may be made in any other suitable manner to ensure the mechanical strength of the light emitting diodes 5 and their power supply.
  • each light-emitting diode 5 is associated, as is more particularly apparent from the figure 2 , to a primary lens 6 which has a convex transmission face 7 being understood that the emission face 7 could also be flat.
  • each light emitting diode 5 is devoid of individual secondary lens.
  • the elongated body 2 comprises two planar reflectors 10 located on either side of the receiving face 4.
  • the two planar reflectors 10 extend parallel to the longitudinal axis L and form one with the other, an angle ⁇ between 90 ° and 160 °.
  • the elongated body 2 defines with the receiving surface 3 and the planar reflectors 10 a lighting chamber 11 in which the array of light-emitting diodes R is intended to be partly at least enclosed.
  • the elongate body 2 also comprises, opposite the lighting chamber 11 with respect to the reflectors 10, a chamber 12 capable of receiving a supply system for the light-emitting diodes 5.
  • a chamber 12 capable of receiving a supply system for the light-emitting diodes 5.
  • the implementation such a chamber 12 is not necessary for producing the elongate body 2 of a linear lighting device according to the invention.
  • the lighting device also comprises an elongated linear hood 20 which at least partly closes the lighting chamber 11.
  • the hood 20 is also intended to let in or diffuse the light emitted by each row of light-emitting diodes R.
  • the cover 20 is made of an at least translucent and preferably transparent material such as for example a plastic material such as polymethyl methacrylate (PMMA), polyethylene terephthalate (PET) or polypropylene (PP) without this list being neither exhaustive nor exhaustive.
  • PMMA polymethyl methacrylate
  • PET polyethylene terephthalate
  • PP polypropylene
  • the cover 20 is also adapted to ensure a conditioning of the light emitted by each row of light-emitting diodes R.
  • the cover 20 forms in relation to each longitudinal row of light-emitting diodes a linear lens 21 parallel to the longitudinal axis L 2.
  • the cover 2 comprises a single linear lens 21.
  • each linear lens 21 is symmetrical with respect to a sagittal plane S substantially parallel to the longitudinal axis L.
  • the sagittal plane S forms a plane of symmetry of the chamber 11, the reflectors 10 then being the image of one another with respect to the sagittal plane S.
  • the linear lens 21 has an inner face 22 for receiving the light of the light-emitting diodes 5 and, opposite this reception face 22, an external light emitting face 23 of the light-emitting diodes 5.
  • the linear lens 21 as a whole ensures transmission of the light emitted by said light-emitting diodes 5.
  • the transmitting surface 23 has, in transverse cross-section, a preferably smooth convex shape with, preferably, a radius of curvature R23 greater than or equal to 8 mm.
  • the receiving face 22 is shaped so that the lens 21 forms a kind of linear Fresnel lens.
  • the reception face 22 comprises, when viewed in transverse cross-section, a central convex diopter 25 and on either side of the latter prisms parallel to the longitudinal axis L.
  • the receiving face 22 presents preferably at least three prisms on each side of the central diopter 25.
  • the receiving face comprises four prisms 26 to 29 on either side of the central diopter 25.
  • Each prism comprises a medial face 30, at least partially flat, situated on the side of the sagittal plane S and a lateral face 31, at least partly flat, located opposite the sagittal plane with respect to the medial face 30.
  • medial and lateral faces of each prism are substantially parallel to the longitudinal axis L.
  • the medial faces 30 and side 31 of the same prism join to form the apex 32 of the corresponding prism.
  • the medial and lateral faces 30 of two consecutive prisms meet to form a longitudinal groove 33 separating the prisms.
  • each longitudinal groove 33 is then measured between a plane tangent to the vertices 32 of the two prisms bordering the groove and a plane tangent to the bottom of the throat if it is curved or between a plane tangent to the vertices 32 of the two prisms bordering the throat and the bottom of the throat if the latter seen in cross section right.
  • the flat portion of the medial face 30 of each prism forms an angle between 0 ° and 5 ° in absolute value with the sagittal plane S.
  • the medial faces 30 converge towards the sagittal plane S in the direction of the emission face 23, or they are parallel to the sagittal plane S.
  • the flat portion of the lateral face 31 of each prism forms an angle between 10 ° and 70 ° in absolute value with the sagittal plane S.
  • the lateral faces converge towards the sagittal plane S at the opposite of the emission face 23.
  • the depth P of the grooves 33 separating the prisms located on the same side of the sagittal plane S increases away from the sagittal plane S.
  • the bottoms of the grooves 33 are then located on a curve C33 whose concavity is oriented towards the receiving face 22 and which has a radius of curvature greater than or equal to 5 mm.
  • the vertices 32 of the prisms are located on a curve C32 whose concavity is oriented towards the illumination chamber 11 and which has a radius of curvature greater than or equal to 3 mm.
  • the radius of curvature of the curve C33 passing through the bottoms 33 of the grooves is greater than or equal to the radius of curvature of the curve C32 passing through the vertices 32 of the prisms.
  • the apex of the emission face 7 of each light emitting diode 5 is situated at a distance d from the vertex of the central diopter 25 of less than or equal to 6 mm and, preferably, between 1 mm and 4 mm. This optimizes the luminous efficiency of the linear lighting device.
  • the top of the emission face 7 of the primary lens of each light-emitting diode 5 is, moreover, located between, on the one hand, a plane P32 tangent to or passing through the vertices. 32 of the two extreme lateral prisms 29 and, on the other hand, a plane tangent to the top of the central diopter 25.
  • the top of the emission face 7 of the primary lens of each light-emitting diode 5 is also located between a plane P10 passing through the lateral edges of the reflectors 10 and a plane tangential to the apex of the central diopter 25.
  • the linear lens 21 has a thickness E, measured between a plane tangent to the top of the central diopter 25 and a plane tangent to the top of the central diopter 25, greater than 1 mm and preferably between 2 mm and 6 mm.
  • a linear lighting device has a light output of at least 89%, the linear lens 21 collimating the light from the diodes 5 thanks, in particular, to linear prisms which allow, after total reflection internal to the linear lens 21, to redirect the light in a narrow cone while the planar reflectors ensure a recycling of the light possibly reflected by the receiving face 22 and the light from the light emitting diodes 5 that would not directly reaches the receiving face 22.
  • the lighting device described above in connection with the Figures 1 and 2 comprises a single row of light-emitting diodes R associated with a linear lens 21.
  • the linear lighting device 1 could comprise several rows of light-emitting diodes R each associated with a linear lens 21.
  • FIG 3 illustrates an alternative embodiment of a lighting device according to the invention comprising three rows R of light-emitting diodes 5. Each row is then associated with a linear lens 21 and two planar reflectors 10 located on the upper side of the row .
  • the body 2 then has, in the present case a conformation corresponding to the juxtaposition of three bodies such as that described in relation to the figure 1 and 2 .
  • the cover 20 integrates three linear lenses 21 each analogous to the linear lens described in connection with the Figures 1 and 2 .
  • the sagittal planes S of the three linear lenses 21 are parallel to one another.
  • the figure 4 illustrates an embodiment of a linear lighting device according to the invention comprising two rows R of light-emitting diodes arranged in two separate lighting chambers 11.
  • the sagittal planes S and S 'of linear lenses, each associated with a row R form an acute angle.
  • the linear lighting device 1 comprises a single body 2 which defines the two lighting chambers 11.
  • the lighting device according to this embodiment comprises a single cover which integrates the two lenses. linear 21.
  • the linear lighting device comprises three rows R of light-emitting diodes
  • the sagittal planes S, S'and S "of the linear lenses, each associated with a row R form acute angles with respect to one another.
  • the body 2 defines the three lighting chambers 11.
  • the lighting device 1 comprises three separate covers 20, 40, 41 and independent which each close a lighting chamber 11.
  • Each hood then integrates a linear lens 21 according to the invention and, for example, as described in connection with the Figures 1 and 2 .
  • each receiving surface 3 of the substrate 4 carrying the diodes 5 is formed by a groove of the body 2 whose bottom is located above the departure of the planar reflectors.
  • the receiving surface 3 could be formed by a single flat face from which the planar reflectors extend.
EP15191993.3A 2014-10-28 2015-10-28 Lineare beleuchtungsvorrichtung mit elektrolumineszenzdioden und linearer linse Not-in-force EP3015758B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1460365A FR3027653B1 (fr) 2014-10-28 2014-10-28 Dispositif d'eclairage lineaire a diodes electroluminescentes et lentille lineaire

Publications (2)

Publication Number Publication Date
EP3015758A1 true EP3015758A1 (de) 2016-05-04
EP3015758B1 EP3015758B1 (de) 2017-07-12

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EP (1) EP3015758B1 (de)
FR (1) FR3027653B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3477192B1 (de) * 2017-10-27 2023-09-27 SITECO GmbH Abdeckung für ein leuchtmodul, leuchtmodul und leuchte

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5613769A (en) * 1992-04-16 1997-03-25 Tir Technologies, Inc. Tir lens apparatus having non-circular configuration about an optical axis
US20120250309A1 (en) * 2011-03-30 2012-10-04 Innovative Lighting, Inc. LED Lighting Fixture with Reconfigurable Light Distribution Pattern
CN103511974A (zh) * 2013-10-25 2014-01-15 浙江晶日照明科技有限公司 一种led线条灯的配光器件
CN203501043U (zh) * 2013-10-25 2014-03-26 浙江晶日照明科技有限公司 一种led线条灯的配光器件

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5613769A (en) * 1992-04-16 1997-03-25 Tir Technologies, Inc. Tir lens apparatus having non-circular configuration about an optical axis
US20120250309A1 (en) * 2011-03-30 2012-10-04 Innovative Lighting, Inc. LED Lighting Fixture with Reconfigurable Light Distribution Pattern
CN103511974A (zh) * 2013-10-25 2014-01-15 浙江晶日照明科技有限公司 一种led线条灯的配光器件
CN203501043U (zh) * 2013-10-25 2014-03-26 浙江晶日照明科技有限公司 一种led线条灯的配光器件

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3477192B1 (de) * 2017-10-27 2023-09-27 SITECO GmbH Abdeckung für ein leuchtmodul, leuchtmodul und leuchte

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FR3027653B1 (fr) 2016-12-09
EP3015758B1 (de) 2017-07-12
FR3027653A1 (fr) 2016-04-29

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