EP0981010A1 - Reflektor für eine Leuchte, insbesondere für Strassenbeleuchtung - Google Patents

Reflektor für eine Leuchte, insbesondere für Strassenbeleuchtung Download PDF

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Publication number
EP0981010A1
EP0981010A1 EP99401990A EP99401990A EP0981010A1 EP 0981010 A1 EP0981010 A1 EP 0981010A1 EP 99401990 A EP99401990 A EP 99401990A EP 99401990 A EP99401990 A EP 99401990A EP 0981010 A1 EP0981010 A1 EP 0981010A1
Authority
EP
European Patent Office
Prior art keywords
reflector
plane
symmetry
cutouts
sheet
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.)
Withdrawn
Application number
EP99401990A
Other languages
English (en)
French (fr)
Inventor
Jean-Pierre Godel
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.)
Thorn Europhane SA
Thorn Europhane
Original Assignee
Thorn Europhane SA
Thorn Europhane
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 Thorn Europhane SA, Thorn Europhane filed Critical Thorn Europhane SA
Publication of EP0981010A1 publication Critical patent/EP0981010A1/de
Withdrawn legal-status Critical Current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
    • F21V7/10—Construction
    • 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
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F21V7/24—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material
    • 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
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F21V7/28—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by coatings
    • 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
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/12—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by screwing
    • 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

Definitions

  • the invention relates to a lighting fixture reflector, for example for public roads, of the type having a concave space between a vertex and a bottom edge. This space is intended to cover a light source with curved optical surfaces with complex shapes located on either side of a plane of symmetry and which converge towards a first end, generally at the opposite of that through which the light source is introduced.
  • the invention also relates to a method of manufacturing the reflector, a suitable body specifically to hold this reflector, and a method of adjusting the surfaces optics of the reflector in the retaining body.
  • Optical surfaces condition in particular the luminous imprint of the luminaire on the surrounding ground, the distribution of light intensity and the presence or absence of light artifacts harmful, such as streaks or spots, on this imprint.
  • the light imprint must be precisely defined in order to contain the lighting in the desired areas, for example a section of road axis, without send flashes of light to riparian areas.
  • the angular distribution of the intensity emitted by the reflector to produce this imprint must be either uniform, or modulated to take into account the distance of the different areas to to illuminate and factors of transmission of ice possibly present under the reflector.
  • public lighting reflectors are generally made in rigid form in aluminum and treated, or in material plastic or other synthetic resins by molding, using techniques complex in order to ensure the best degree of precision in shapes and a good surface quality.
  • the molding operation must be followed by a deposit of reflective layer on the concave surface, for example by spraying cathodic, in order to make this surface specular, like a drawer, or diffusing.
  • the reflectors produced by folding a sheet are intended to cooperate with a longiform light source, such as a discharge lamp. They therefore have an optical surface curved around a single axis only, which corresponds to that of the light source.
  • the relatively form simple reflector is obtained by winding a sheet.
  • document FR-A-2 517 805 describes a reflector in trough shape for a discharge lamp.
  • the shape is achieved by bending a pre-cut sheet metal to give it a uniform parabolic section over its entire length.
  • the end walls of the trough are made by sections of this sheet metal forming ears folded at right angles during forming.
  • a series of tabs is produced by cutting out a sheet metal and we carry out a succession of transverse folds on these tabs so to obtain a desired curvature.
  • the reflector thus presents a series of facets planes oriented differently. along the fold lines.
  • This type of reflector does cannot produce a well-controlled light flux because it does not have continuous curved surfaces.
  • the folds between the facets tend to create unacceptable artifacts for street lighting.
  • the present invention provides a reflector for public lighting luminaire having a concave space between a vertex and a edge of lower perimeter, the reflector having first and second ends and allowing to cover a light source with surfaces optics located on either side of a plane of symmetry, the optical surfaces converging towards the first end of the reflector, characterized in that it is consisting of a folded sheet having, at at least part of the optical surfaces, surface elements having curvatures in two planes perpendicular.
  • the Applicant has unexpectedly discovered that complex shapes with curvatures in two perpendicular planes can be produced with a quality that is entirely acceptable for the intended application from of an initially flat sheet, folded so as to create the general shape of the reflector.
  • folding of surface elements in two perpendicular planes in accordance with the present invention generates a two-dimensional deformation (stretching and / or compression) of the sheet material at the optical surfaces.
  • the reflector according to the present invention can have good quality smooth optical surfaces to achieve efficiency high optics.
  • the sheet is made of thin sheet metal, such as a sheet aluminum less than a millimeter thick.
  • this sheet may have a smooth reflecting surface, the latter being for example specular or satin.
  • Such a base material, with a good quality reflective surface is widely available commercially, being conventionally used in various fields, such as building.
  • the surface quality is due to the rolling of high precision and processing during the manufacturing of the material for reasons not necessarily dictated by optical considerations.
  • the sheet may have cutouts at the or around optical surfaces intended to close at least partially when folding. Indeed, the selective removal of material by cutouts pennet to accommodate local surface modification due to stretching or compression caused by bending in two planes perpendicular.
  • the shape and location of the cuts can be determined experimentally to assure the reflector the complete absence of funny faces over its entire optical surface, without leaving too large an interval between the opposite edges formed by cutouts.
  • the cutouts are provided around bending zones pronounced optical surfaces, these being more likely to create a wrinkling of the sheet during forming.
  • the cuts can in particular include, for each section of on either side of the plane of symmetry of the reflector, a first cut starting from a lower edge located near the first end and ending towards the top, and a second starting from the lower edge near the second end and ending towards the top, the portion of surface between these two cutouts forming a sidewall having a general plane substantially parallel to the plane of symmetry of the reflector.
  • the shape and length of the first and second cutouts are provided to allow for flank travel as well formed in a direction substantially perpendicular to the plane of symmetry.
  • This travel due to the elasticity of the material at the junction of the sidewall with the top of the reflector, provides two remarkable technical effects: i) it pennet to properly position the reflector in position in a retaining body thanks to the force sidewall spacing when these are slightly compressed towards the axis of symmetry and ii) it allows a degree of adjustment of the optical characteristics of the reflector by playing on the approximation or spacing of the flanks relative to the axis of symmetry.
  • the first and second cutouts tend to converge towards the top portion of the reflector.
  • the separation between the respective end points of the cutouts defines a junction area of the flank with the top of the reflector. This area is preferably located on a part having only a curvature fuse in a plane parallel to the plane of symmetry, so as to allow a free articulation of the sides on this zone during travel.
  • the portion of surface bordered by the respective first cuts constitutes a language having a general curvature in the plane of symmetry of the reflector between the top portion and the bottom edge at the level of the first end.
  • the reflector comprises, at its second end, a flat part, substantially perpendicular to the plane of symmetry, including a passage for the light source, this part depending on the top of the reflector and being bordered by the second cutouts respective.
  • the reflector comprises in in addition to a third cut or more, located between the first and second cutouts, starting substantially perpendicularly from a lower edge of the optical surface.
  • This third cut can end at a point set back from the points for finishing the first and second cuts.
  • the reflector may further include a fourth cut or more starting from a first or a second cut.
  • the abovementioned cuts have, at their end point, two inner edges that meet without forming an angle lively, the end point being for example a cutting portion forming a rounded head separating the ends of these two edges. This arrangement avoids weaken the reflector material at the cutout end points.
  • the reflector Due to its sheet structure and cutouts, the reflector has a degree of elasticity in its general shape which favors easy mounting on a body of lighting. It is in particular possible to provide an anchoring of the reflector to the level of its top, preferably by means of a through hole in the plane of symmetry and allowing connection by a cooperating fixing element with the luminaire body.
  • a luminaire body intended to receive the aforementioned reflector, this body being characterized in that it has curved bearing surfaces adapted to that of the reflector surface at the contact points and at least one means of anchoring the reflector making it possible to hold the reflector against these bearing surfaces.
  • bearing surfaces can be shaped so as to wrap at at least partially a part of the reflector between two lower edges on the side and other side of the plane of symmetry, in order to prevent deformation of the reflector by loosening effect due to its elasticity.
  • bearing surfaces comprise a series of plates or ribs each having a slice forming a bearing surface for the reflector, each edge having a curvature adapted to that of the reflector its contact area with the latter.
  • These sections can be substantially perpendicular to the plane of symmetry of the reflector, and located between the first end and a mid-point between the first and the second end.
  • the support can be provided with bending means allowing to apply a controlled travel on at least part of these surfaces, by example of the portions having a general plane parallel to the plane of symmetry. This travel can be combined with a change in the curvature of the surface optical, also having the effect of regulating the return of the luminous flux.
  • the elasticity of the material means that the deflection actions cause a change in the curvature of the reflector, and vice versa.
  • the flexing means can comprise at least one retained element by the luminaire body and which can be arranged to press on part of the outer surface of the reflector so as to push it towards the plane of symmetry against its elastic force.
  • the bending means may comprise a wedge or more in shape adapted to be inserted between an inner part of the body of luminaire and an external part of the reflector, so as to push it towards the plane of symmetry against its elastic force.
  • the optical adjustment is then obtained by choosing shims of appropriate dimensions; thus, one can provide a set of shims of different dimensions allowing combinations of adjustment.
  • the bending means can also be constituted by the support surfaces of the support themselves.
  • the aforementioned plates can be removable from the luminaire body and form part of a set of profiled plates with different possible curvatures, so to print on the reflector, at its fulcrum, a desired curvature from a choice of several possible curvatures.
  • the anchoring means comprises a fastening element cooperating with a hole located at a portion of the top of the reflector.
  • the anchoring means can then transmit on all bearing surfaces pressing against it by exerting a clamping force on the top against the bottom of the luminaire body. This provision allows in particular to require only one anchor point, for example at the top of the plane of symmetry, to ensure good retention of the reflector in the body. In this way, the reflector is not stressed during expansion phenomena thermal.
  • the fixing means can also constitute a bending means by providing a clamping stroke on which the reflector is stressed in elasticity.
  • the curvatures of the reflector are then modified by the pressure exerted by the bearing surfaces as a function of the tightening, this can be interrupted over an adjustment range while ensuring fixing adequate.
  • the die is part of a stamping press.
  • the method can also comprise a step aiming to provide one or more cutouts on the sheet corresponding to the first, second, third or fourth aforementioned cuts.
  • the present invention also relates to a method for adjusting the configuration of an optical surface of a reflector housed in its body luminaire, by controlled deformation of this optical surface.
  • the reflector 2 conforms to the invention consists of a cut and folded sheet forming a concave space 4 for covering a light source 6 (shown in dotted lines).
  • This space 4 is delimited by a set of reflecting optical surfaces between a first and a second end (respectively 8 and 10) of a plane of symmetry S, a vertex 12 and a lower perimeter edge 14.
  • An opening 16 is provided at the second end 10 to allow passage of the light source 6 in the concave space 4.
  • the optical surfaces include an elongated portion forming a tongue 16 which extends from the part of the vertex 12 situated at the second end 10 to the lower edge 14 located towards the first end 8.
  • This tongue 16 is generally perpendicular to the plane of symmetry S and curved in this plane (figure 2). It is physically distinguished from the rest of the reflector 2 by cuts. These include, on each side of the plane of symmetry S, a first cut 18 starting from the lower edge 14 near the first end 8 and also ending at vertex 12, and a second cutout 20 from the bottom edge 14 near the second end 10 and also ending at the vertex 12.
  • the termination points 18a, 20a first and second cutouts 18, 20 are separated and aligned in a plane parallel to the plane of symmetry S.
  • the reflector 2 On either side of the plane of symmetry S, the reflector 2 has a flank 22 delimited by the first and second cutouts 18, 20 and the part of the edge lower 14 between these cuts.
  • Each flank 22 has a general plan substantially parallel to the plane of symmetry S and has a turned concave optical surface towards the plane of symmetry ( Figure 1). This surface has curvature elements on two perpendicular planes, thus forming a complex optical surface.
  • the reflector is positioned so that the flanking portions 22 direct the light flux towards distributed points in the direction of this axis.
  • Each surface element on this flank 22 directs the flow on a specific area.
  • the flank surface elements close to the top 12 return the flow towards the plumb of the reflector, while the elements close to the lower edge 14 return the flow to distant points.
  • the curvature of the sidewall 22 also conditions the distribution of the intensity of the luminous flux returned to lighting areas.
  • the distribution of the intensity of the flux from the reflector 2 takes account of the differences in the remoteness of the lighted areas and the possible presence of a protective glass under the reflector, this having coefficients of transmission which vary according to the angle subtended by the light rays. These factors make the reflector designed to accentuate the intensity of the flux at level of the lower edges 14 which return the luminous flux to areas distant.
  • the optical surfaces located at the part of the reflector 2 forming the tongue 16 also have a curvature on two perpendicular planes so as to form a complex surface.
  • language 16 has, on its optical surface, a raising 16a (FIG. 3) along the plane of symmetry S from the second end 10 to the lower edge 14 at the first end.
  • This enhancement 16a divides the curvature of the tongue 16 over a section perpendicular to the plane of symmetry S in two curvatures 24a, 24b.
  • Each curvature 24a, 24b is provided to send part of the flow towards the edge lower 14 of the adjacent flank 22, in order to reinforce the light intensity on this portion of the reflector.
  • the reflector 2 incorporates at its second end 10, between the respective sides 22, a part forming a planar wall 26, substantially perpendicular to the plane of symmetry S.
  • This wall 26 depends on the vertex 12 of the reflector and is delimited by parallel edges 26a formed by each of the second cutouts 20.
  • the wall 26 includes the opening 16 to form the passage of the light source 6, this opening being accessible by the lower edge 14.
  • first and second cutouts 18, 20 separate, by edges respective, the portions of the assembly of the reflector 2 which comprise the tongue 16, the two sides 22 and the flat wall 26.
  • the shape and location of the first and second cuts 18, 20 are calculated to favor the forming of the reflector 2.
  • These cutouts 18, 20 indeed constitute portions of material removed from the material initially in flat sheet, which can accommodate convergent movements surface elements during bending and stretching or compression by forming the reflector.
  • the stretching or compression of the material comes from in particular because it undergoes, on surface elements, a double curvature on perpendicular axes.
  • first and second cutouts 18, 20 tend to surround areas with strong curvature or with strong curvature transition, their role being to prevent the formation of grimaces or creases on surfaces reflector optics. In some configurations, it may be necessary add other additional cuts.
  • a third cut 28 located between the first and second cut 18, 20. This third cut 28 leaves perpendicularly from the lower edge 14.
  • Each sidewall 22 also includes a fourth cutout 30 which leaves of the second cut 20 in a direction substantially parallel to the edge of the flank 14.
  • the length of the third and fourth cuts 28, 30 depends on the curvature or the curvature transition at their neighborhood. So generally, a cut makes it possible to accommodate a convergence of material in a direction perpendicular to its longitudinal development.
  • the first, second, third and fourth cutouts have two opposite edges that converge at a low angle between them.
  • the junction between these two edges is made by a small cut rounded 18a, 20a, 28a, 30a, each edge ending on a different part of the around this cutout. This termination by a rounded cut thus avoids create a sharp angle between the edges, which would tend to make the material fragile at tear.
  • the top 12 of the reflector 2 has a through hole 32 at a point median on the plane of symmetry S to allow its mounting on its body of maintenance.
  • FIG. 4 shows the preform of a flat part 100 cut out for allow to form the reflector of Figures 1 and 2.
  • the outer edges of the sheet 100 constitute the lower edges 14 of the reflector 2.
  • the first and second cutouts 18, 20 have sides in eyes which are curved and which move away markedly from the central area of the part, which corresponds to the top 12 of the reflector, towards outer edges.
  • the sheet 100 thus cut is formed by stamping on a press classic comprising a concave matrix having the shape and dimensions of the reflector 2 of FIGS. 1 and 2, and a stamping part having a shape corresponding convex.
  • FIG. 5 shows the mounting of the reflector 2 in its holding body.
  • This body 40 includes a cradle-shaped housing 42 conforming so as to completely cover the exterior surfaces of reflector 2.
  • a series of ribs in the form of plates 44a-44f are provided in the part of the housing 42 intended to receive the part of the reflector 2 between its apex 12 and the first end 8.
  • These plates 44a-44f are aligned perpendicular to the plane of symmetry S 'of the body 40 and have edges 46a-46f forming surfaces support for the reflector 2.
  • These sections 36a-36f are profiled so as to match the curvature of the reflector 2 along the points of contact with the latter.
  • the plaques 44a, 44b located very close to the first end 8 of the reflector 2 take support only against the part of the reflector forming the tongue 16.
  • those 44c-44f which are further back are not only supported against the part forming the tongue 16, but also against each respective flank 22.
  • These plates 44c-44f thus make it possible to keep the flank portions 22 tightened in the correct position, opposing their tendency to spread by loosening due to the elasticity of the material.
  • the plates 44a-f can be either integral with the luminaire body, being for example molded with the latter, or removably mounted vis-à-vis the body of lighting.
  • the housing 42 also includes a set of profiled surfaces 48 on the bottom and on the wall portions towards the outer rim to maintain wedged the other contact surfaces of the reflector 2.
  • the reflector 2 is anchored in the retaining body 40 by a screw 50 passing through the opening 32 of the reflector.
  • a set of jumpers 52 adapted to be fixed on the edge of the plates 44a-f.
  • Each rider has the shape of a folded tongue over 180 degrees so as to present two opposite faces intended to press respective faces of the plate 44a-f.
  • the folded part is placed on the edge of the plate or rib and forms a wedge with the function of raising locally the profile of it.
  • the jumpers 52 constitute elements removable, possibly adapted to slide on the plates, while ensuring good immobilization.
  • jumpers 52 on the plates or ribs 44a-f allows, depending on the number and location of these, to impose, in a controlled manner, a deformation and / or a deflection additional reflector 2.
  • the surface portions of reflector 2 in support against a jumper 52 are actually subjected by the latter to a pressure of deformation and / or a deflection force towards the interior of the concave space of the reflector according to profile enhancement.
  • this comes mainly from a bending in the area of material between the two termination points 18a, 20a of the first and second cutouts 18, 20, forming the junction of the sidewall 22 with the portion of the reflector forming the top 12.
  • this can be configured to present only a small curvature in the plane of symmetry S of the reflector 2.
  • the bending is accompanied by a change in the curvature complex optical surfaces of the side 22 of the reflector.
  • the combined action of deflection and curvature modification then makes it possible to substantially modify the light flux distribution characteristics of the reflector 2.
  • the jumpers can be replaced by any other known means capable of impose a controlled travel on the reflector surfaces. It is notably conceivable to provide shims or pads of various shapes that can be lodge in the body of the luminaire opposite the external surface of the reflector 2. For example, support elements can be arranged between the plates 44a-f.
  • a set of shims of different thicknesses can thus be provided to allow a choice of setting.
  • the possibility of carrying out a controlled modification of a reflector can also be used when designing or studying the latter.
  • the reflector under study is mounted in an adjustment cradle having the function of maintain it and have it submit curvature changes.
  • the adjustment cradle includes a recess shaped to match the exterior surface of the reflector in a configuration normal support.
  • This recess is made up of surface elements some of which can be moved forward and backward vis-à-vis the elements neighbors.
  • the displacement can be effected by a screwing device, for example a micrometric screw, associated with an adjustable surface element accessible from outside.
  • the surface forming the recess of the cradle may be one block, the adjustment being carried out in this case by simple screws which penetrate towards the interior so as to come to bear on different points of the reflector.
  • the ends of the screws can optionally be provided with pads.
  • a reflector can be installed on such an adjustment cradle in its basic configuration and subjected to photometric measurements with different bends thanks to the adjustment devices. We can then easily determine by empirical way the optimal curvature for a reflector according to the criteria photometric fixed. Once this curvature is obtained, the configuration is located of the cradle by reference to the adjustment positions of the screwing devices. AT From this data, it is possible to make a reflector support and / or a suitable reflector surface configuration.
  • this design aid tool can be used not only for reflectors produced by stamping, but more generally with any type of reflector suitable for a controllable local deformation of its surface by mechanical stress.
  • the present invention is in no way limited by the example which comes to be described. Many variations are possible, both in terms of the choice of sheet material, of the initial form thereof before forming (periphery, cutting, drilling, etc.) and imposed bends.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Optical Elements Other Than Lenses (AREA)
EP99401990A 1998-08-19 1999-08-05 Reflektor für eine Leuchte, insbesondere für Strassenbeleuchtung Withdrawn EP0981010A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9810535A FR2782551B1 (fr) 1998-08-19 1998-08-19 Reflecteur de luminaire d'eclairage notamment pour voie publique
FR9810535 1998-08-19

Publications (1)

Publication Number Publication Date
EP0981010A1 true EP0981010A1 (de) 2000-02-23

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EP99401990A Withdrawn EP0981010A1 (de) 1998-08-19 1999-08-05 Reflektor für eine Leuchte, insbesondere für Strassenbeleuchtung

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FR (1) FR2782551B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118757711A (zh) * 2024-08-09 2024-10-11 扬德电气集团有限公司 一种智能控光的节能led路灯

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2284820A1 (fr) 1974-09-11 1976-04-09 Esquire Inc Luminaire
AU475784B2 (en) * 1974-10-31 1976-09-02 H. O. P. (Illumination) Pty. Limited Reflector
FR2517805A1 (fr) 1981-12-07 1983-06-10 Polaroid Corp Dispositif d'eclairage par eclairs avec dispositif reflecteur, et son procede de fabrication
EP0457645A2 (de) * 1990-05-15 1991-11-21 Francis David Beleuchtungsvorrichtung
FR2737281A1 (fr) 1995-07-25 1997-01-31 Fd Eclairage Dispositif d'eclairage destine a etre integre dans une surface telle qu'un faux plafond

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4575788A (en) * 1984-04-30 1986-03-11 Ql, Inc. Segmented luminaire

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2284820A1 (fr) 1974-09-11 1976-04-09 Esquire Inc Luminaire
AU475784B2 (en) * 1974-10-31 1976-09-02 H. O. P. (Illumination) Pty. Limited Reflector
FR2517805A1 (fr) 1981-12-07 1983-06-10 Polaroid Corp Dispositif d'eclairage par eclairs avec dispositif reflecteur, et son procede de fabrication
EP0457645A2 (de) * 1990-05-15 1991-11-21 Francis David Beleuchtungsvorrichtung
FR2737281A1 (fr) 1995-07-25 1997-01-31 Fd Eclairage Dispositif d'eclairage destine a etre integre dans une surface telle qu'un faux plafond

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118757711A (zh) * 2024-08-09 2024-10-11 扬德电气集团有限公司 一种智能控光的节能led路灯

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FR2782551B1 (fr) 2000-11-10

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