EP2702319A2 - Light and method for the production thereof - Google Patents
Light and method for the production thereofInfo
- Publication number
- EP2702319A2 EP2702319A2 EP12723827.7A EP12723827A EP2702319A2 EP 2702319 A2 EP2702319 A2 EP 2702319A2 EP 12723827 A EP12723827 A EP 12723827A EP 2702319 A2 EP2702319 A2 EP 2702319A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- lens
- circuit board
- lens holder
- lens body
- printed circuit
- 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
Links
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
- 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
- F21V17/101—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 permanently, e.g. welding, gluing or riveting
-
- 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
- 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 luminaires comprising a printed circuit board on which at least one luminous means, preferably in the form of an LED package, is arranged, and a lens which is provided above the luminous means on said printed circuit board.
- the invention relates in particular to the attachment of the lens body to the lamp-carrying circuit board, and a method for producing such a lamp with a lens attached to a circuit board.
- the bulbs are known in which bulbs such as LEDs or other point-like light sources are mounted on a circuit board or board, from which the bulbs are powered.
- the bulbs are often preceded by lenses that sit above the bulbs and are accordingly arranged on or in front of said circuit board.
- the lenses may have on their side facing the printed circuit board a recess or recess, with which the lenses can be at least a little over the bulbs placed so that the lenses very close to the PCB come to rest.
- the document DE 10 2008 055 936 shows the attachment of a lens to the printed circuit board of an LED by means of snap connections, in particular by means of a wire clasp enclosing the lens, which can be hooked under a projection of the printed circuit board.
- the document GB 23 91 702 shows honeycomb-shaped lens holder, by means of which lenses can be fixed on an LED circuit board. The lenses are clipped into the lens holder to be releasable again, while the connection of the lens holder to the circuit board by clipping or riveting of feet inserted through the board should be done.
- the exact positioning and alignment of the lenses in such lights with circuit board is not readily achieved in a simple manner, since the lens holder on the one hand should not affect the optical function of the lens and on the other hand must be matched to the material of the lens. In particular, the light entry and light exit surfaces of the lens should not be covered by the lens holder.
- lenses usually consist of glass or transparent hard plastics or silicones which are not readily attachable to the circuit board itself.
- lens holders have hitherto been used which surround the lenses on the circumference and are mounted separately on light-emitting-aid components, which are fastened together with the printed circuit board to a luminaire housing or carrier part.
- the production times are affected by a corresponding number of assembly steps.
- the present invention is therefore based on the object, an improved luminaire and an improved manufacturing method in each case of the type mentioned avoid the disadvantages of the prior art and develop the latter in an advantageous manner.
- an exact positioning and alignment of the lens relative to the light source and the circuit board can be achieved.
- this object is achieved by a luminaire according to claim 1 and a method for producing a luminaire according to claim 13.
- Preferred embodiments of the invention are the subject of the dependent claims.
- the fastening means for fastening the lens body to the printed circuit board have a lens holder made of a solderable material, which is formed directly on the lens body and can be soldered to the printed circuit board.
- the holding section of the lens holder can be molded onto the lens body by pouring or encapsulation, or the lens body can be cast on or molded onto the lens holder or molded onto the lens holder in a materially cohesive manner.
- the lens can be positioned very close to or directly on the printed circuit board, so that the light source can be almost completely encompassed by the lens, and also laterally emitted light can be conducted completely into the lens.
- a high degree of precision is achieved with respect to alignment and positioning of the lens relative to the illuminant and to the circuit board.
- the illuminant and the lens can be advantageously positioned together and aligned with each other in a preparatory step on the circuit board, and then, when the illuminant and the lens are positioned and aligned with the circuit board, soldered in a common joining step to the circuit board.
- the lens holder can be attached to the lens by a primary shaping or forming step, wherein in particular the attachment of the lens holder to the lens body during the original and / or reshaping of the lens, in particular during casting or spraying of the lens can be such that the lens holder with one or more holding sections on or on several sides connected to the material of the lens body and / or is enclosed on all sides by the lens material.
- the lens holder can be placed with its holding portion in a casting or injection mold, for example, such that the holding portion forms part of the wall of the mold or is applied to this, so that when introducing the lens material of the holding portion of the lens holder integrally to the lens body is formed or molded in this.
- a material-fit or material-connection-like connection is formed directly between the holding section and the material of the lens body, for example by atomic or molecular bonds between the materials and / or by microforming in the sense of a microscopic or macroscopic entanglement of the lens material flowing in at or in the surface structure and any pores and roughnesses there, so that binds the lens material during solidification on the holding portion of the lens holder.
- the holding portion of the lens holder can be directly attached to the material of the lens body.
- the molding of the lens holder on the lens body can be done not only directly during prototyping or reshaping of the lens body, but optionally also in a subsequent processing step, for example, such that the lens material is at least partially remelted, for example by means of laser radiation to the then against the molten Material of the lens body pressed holding section so to speak, welded to the lens body.
- the resolidifying lens material binds the lens holder to itself. This also allows an immediate connection of the lens holder to the lens body done, which allows precise positioning.
- the lens holder can advantageously likewise be molded or integrated into it during the shaping or production of the lens.
- the named lens holder made of solderable material can, however, in principle also be attached to the lens body in a different manner.
- said lens holder possibly in addition to molding, for example, by welding, are clamped or latched to the lens body, for example by a clip-like positive connection, for example, such that the lens body recesses and / or -vorsprünge comprises, in which an elastically formed lens holder For example, can snap in elastic with locking tongues.
- the lens holder may comprise at least one anchor portion anchored in the interior of the lens body and at least one soldering portion located outside the lens body.
- Said anchor portion may advantageously be cast or injected into the lens body.
- the or another anchor portion may also be latched to a portion of the lens body or otherwise connected in a positive and / or frictionally engaged manner.
- said anchor portion may have at least one undercut in the interior of the lens body when viewed in the pulling direction, preferably in the form of a hook, loop or window-shaped holding portion with a holding recess which is filled with material of the lens body can be filled.
- the anchor portion may also be understood to have a microstructure which may be, for example, scale-like or comb-shaped.
- the lens body in the region of said undercut can form a bridge of material which extends through said recess of the holding section.
- the anchor portion has at least one window-shaped opening, the material of the lens body can pass through the window-shaped recess during encapsulation, as a result of which the lens holder is anchored particularly robustly.
- said anchor portion advantageously has said undercut, which is advantageously embedded in the interior of the lens body and / or acts on a form-fitting holding portion of the lens body.
- the lens holder with a holding section can also be cast on or molded onto the lens body or otherwise integrally formed, for example by molding the lens body on a surface of the holding section of the lens holder.
- Such superficial molding can be special may be sufficient if the lens is formed of a material which can develop high bonding forces to a metallic lens holder.
- the lens may for example be formed of silicone or a material based on silicone or a silicone-containing material, which may develop equally high-quality optical properties as well as good binding forces to the metallic lens holder. Depending on the design of the lens holder or the requirements of the lens, however, this can also be made of other suitable materials.
- the mentioned lens holder can be arranged in a further development of the invention on a front side portion of the lens body surrounding the recess, so that the lens holder with its outside of the lens body extending portion substantially between the lens body and the circuit board.
- the lens holder can sit on the circuit board and the lens body in turn sit on the lens holder. On the one hand, this allows an exact positioning of the lens on the printed circuit board. On the other hand, the optical obstruction of the beam paths in the lens is minimized.
- the lens holder can also be incorporated flush in the lens body, in particular such that the printed circuit board facing surfaces of the lens body on the one hand and the lens holder on the other hand are approximately at the same level or flush with each other.
- both the lens holder and the lens body itself sit on the circuit board, wherein the solder connection takes place in the region of the exposed surface of the lens holder.
- Such a flush incorporation of the lens holder in the lens body can in principle be done in various ways, for example, by directly pouring or casting or injecting the lens body to the lens holder in the lens production.
- a corresponding recess may be incorporated, in which the lens holder is then sunk so that it flush is positioned with the surface of the lens body, wherein the lens holder, for example, in the said recess can be welded or -gekank.
- the lens holder is here anchored with its at least one anchor portion in the edge and / or surrounding area of the lens body around said recess around.
- the lens holder can extend in an advantageous development of the invention on opposite sides of the aforementioned recess.
- said lens holder may be annular or with its located outside of the lens body portion form a ring, possibly also a slotted ring which extends around said lens recess on the light entrance side.
- the lens holder may have with its located outside of the lens body portion has a preferably flat footprint for placing the lens on the circuit board.
- said contact surface does not form a closed ring, but is formed from a plurality of spaced contact surface sections, advantageously along a ring contour, in particular around the aforementioned recess portion of Lens can be arranged around.
- the lens holder can be soldered in a further development of the invention directly on the side facing the lens of the circuit board, for example, with the aforementioned ring or contact patch section.
- the lens holder can also be soldered on the rear side of the circuit board facing away from the lens.
- the lens holder may preferably comprise pin-shaped push-through projections, which pass through corresponding holes or recesses in the printed circuit board can be inserted so that can be soldered on the back side protruding portions of said push-through projections on the local, rear PCB side.
- the soldering portion of the lens holder may consist of metal or a metal alloy in an advantageous embodiment of the invention, which forms a solid compound with a metallic solder, for example in the form of a tin compound.
- the lens holder made of a copper material or a copper alloy, but other metallic materials are possible.
- the lens holder consists of a metal material whose melting temperature is significantly above the melting temperature of the solder.
- the lens holder, in particular its soldering portion also consist of a metal material, which itself forms the solder for the solder joint, so that a corresponding solder portion of the lens holder is melted during soldering and soldered to the corresponding portion of the circuit board.
- a metal material that does not melt during soldering itself and is soldered to the circuit board with the addition of a suitable solder.
- FIG. 1 shows an exploded view of a luminaire comprising a printed circuit board with a luminous means in the form of an LED and a lens assigned to the luminous means, which is soldered to the printed circuit board by means of an annular lens holder, the components of the luminaire being shown in perspective view,
- Fig. 2 a side and sectional view of the lamp of FIG. 1, wherein the
- Partial view (a) The light exploded in side view, the partial view (b) a section along the line AA in the partial view (a) and the partial view (c) shows a section along the line BB in the partial view (a) of Fig. 2,
- FIG. 3 shows an exploded perspective view of a luminaire similar to FIG. 1 according to a further advantageous embodiment of the invention, according to which the lens holder for attachment of the lens to the circuit board has through-projections which can be pushed through the circuit board and soldered on the back,
- Fig. 4 is a side and sectional view of the lamp of Fig. 3 in exploded view, wherein the partial view (a) shows a side view of the lamp, the partial view (b) a section along the line EE and the partial view (c) along a section the line FF from the partial view (a) shows
- Fig. 5 is an exploded perspective view of a lamp similar to FIG. 1 according to a further advantageous embodiment of the invention, according to which the lens holder is formed in several parts and does not form a closed, annular footprint, and
- Fig. 6 is a side and sectional view of the lamp of Fig. 5, wherein the
- Partial view (a) shows an exploded side view of the luminaire, the partial view (b) shows a section along the line C-C and the partial view (c) shows a section along the line D-D from the partial view (a) of Fig. 6, and
- Fig. 7 is an exploded perspective view of a lamp similar to Figure 1 according to a further advantageous embodiment of the invention, according to which an annular lens holder is superficially formed on the lens, and 8 shows a side and sectional view of the luminaire from FIG. 7, the partial view (a) showing an exploded side view of the luminaire and the partial view (b) a section along the line HH from the partial view (a).
- the lamp 1 comprises a printed circuit board 2 or board on which a lamp 3 is mounted in the form of an LED, which is supplied via said circuit board 2 with power or is driven. Furthermore, the lamp 1 comprises a lens 4, the shape of which may vary depending on the desired light distribution and has a lens body 5 made of solid material which sits directly in front of the printed circuit board 2 or is set via the lighting means 3. As shown in FIG. 1, the lens 2 in this case comprises opposite end faces, on the one hand form a light entrance side and on the other hand, a light exit side or surface, wherein the light entrance side of the circuit board 2 faces and may have a smaller diameter or a smaller area than the light exit side ,
- the lens 4 may have on its side facing the circuit board 2 a blind hole or cup-shaped depression 6, cf. Fig. 2, there the sectional views (b) and (c), with which the lens 4 can be set via the light source 3, so that the light-emitting means 3 is at least partially received in the recess 6.
- laterally emitted light can be captured and the lens 4 can be positioned directly on the printed circuit board 2.
- a lens holder 7 is fixed to the lens 4, which is arranged and fixed to the circuit board side end side of the lens 4.
- the lens holder 7 comprises a soldering section 8 extending outside the lens 4 and a holding section, for example in the form of anchor sections 9 located at least inside the lens body 5.
- said lens holder 7 is seated on a preferably frontal edge section 10 of the lens body 5 which supports the lens holder 7 surrounds the aforementioned recess 6.
- the anchor portions 9 extend in the interior of the lens body 5 in an environmental portion of the lens body 5 surrounding said recess 6.
- the anchor portions 9 are advantageously evenly distributed around the circumference of the recess 6 around and can - especially at two anchor sections - extend on opposite sides of the recess 6. For example, if there are three anchor portions 9, they may be spaced apart by a uniform pitch of 2/3 ⁇ .
- the anchor portions 9 are formed only over a limited peripheral portion in order to impede the optical properties of the lens 4 as little as possible.
- the anchor portions 9, together with their circumferential extent can occupy less than 1/2, preferably less than 1/3, of the circumferential extent of the lens holder 7 or of the edge portion 10, so that the remaining portions of the lens body 5 are completely unimpaired with respect to their optical properties remain.
- the mentioned anchor portions 9 extend in this case only limited in their depth.
- the depth of the anchor portions 9 is smaller than the diameter of the recess 6, advantageously smaller than half the diameter of said recess 6. Does the lens 4 no recess 6 of the type mentioned, the anchor portions 9 are still in their circumferential extent and / or depth is limited, advantageously such that the depth is less than 1/2, preferably less than 1/3 of the diameter of the lens entrance side forming lens front surface.
- Said anchor portions 9 are advantageously formed undercut in the direction of the lens longitudinal or -Symmetrieachse in order to increase the strength of the connection.
- said anchor portions 9 may have within the lens body 5 arranged, preferably window-shaped recesses, which are filled with material of the lens body 5.
- said anchor portions 9 are formed in the lens body 5 when the lens body 5 is manufactured, in particular, molded or injected when the lens body 5 (injection) is poured.
- the lens body 5 can also be pressed into shape, in which case the anchor sections 9 can be integrated into the lens body 5 when pressed.
- the soldering portion 8 of the lens holder 7 extending outside the lens body 5 can have an annular contour and / or form an annular contact surface 11, with which the lens 4 can be placed on the printed circuit board 2.
- both the light source 3 and the lens 4 are positioned on the printed circuit board 2 in the desired orientation to each other, which can be achieved, for example, that corresponding positioning projections on the light source 3 and / or the lens. 4 be inserted into corresponding PositionierausEnglishept in the circuit board. If said components are positioned on the printed circuit board 2, they are then soldered, wherein the lens 4 is soldered by means of the lens holder 7, which is soldered with its aforementioned soldering portion 8. If the soldering of both the luminous means 3 and the lens 4 takes place on the side of the printed circuit board facing the lens, in principle the luminous means 3 can first be positioned on the printed circuit board 2 and soldered there.
- the lens 4 is positioned on the circuit board 2 and then soldered.
- the lens 4 and the luminous means 3 are soldered at the same time or in the same step, if this takes place on the lens side of the printed circuit board 2, for example in an SMD soldering process in which the components to be soldered, i. Lens 4 and circuit board 2, together in set position can retract one another in an oven to melt or soften the solder provided in advance between the components to be connected in order to solder the components together.
- the positioning steps for both components can be common. sam executed and then, as soon as the two components are positioned, are soldered in a common soldering step, for example by Tauchlötmaschine.
- the lens holder 7 can have through-projections, with which the lens holder 7 can be inserted through corresponding recesses in the circuit board, as shown in Figures 3 and 4.
- the lens holder 7 also comprises an anchor portion 9 which is embedded in the material of the lens body 5, in particular molded, wherein in the embodiment shown in Fig. 3, said anchor portion 9 is annular, but also according to the previous embodiment of different sections could be composed.
- Said anchor portion 9 is connected to a plurality of soldering portions 8 which protrude from the lens 4 and pin-shaped through-projections 12 form in the illustrated embodiment, which can be inserted through recesses 13 in the circuit board 2, so that the push-through projections 12 on the back of the circuit board. 2 emerge and can be soldered there.
- the lens holder 7 does not have to have a closed ring shape, but can also consist of several parts.
- segment-shaped lens holder parts are provided, each comprising an anchor portion 9 embedded embedded in the material of the lens body 5 in particular cast or injected and may have in the aforementioned manner undercuts or injection-molded, window-shaped recesses.
- the said lens holder parts also continue to have outside the lens body 5 located soldering portions 8, which together form a footprint for placement on the circuit board 2.
- soldering portions 8 With the aforementioned soldering portions 8, the lens 4 can be soldered on the front side of the printed circuit board 2 on preferably opposite sides of the luminous means 3. Due to the segmented design of the lens holder 7 and printed circuit boards 2 can be used in which conductors on the lens 4 facing the front run because they are not contacted by the segmented training or the soldering portions 8 consistently around the bulb 3 around.
- the lens holder 7 does not necessarily have to be cast into the material of the lens body 5, but may also only be integrally formed thereon, in particular bonded to it in a materially superficial manner.
- the lens holder 7 can hereby be designed overall in the form of a ring which is formed by its dimensioning and / or contouring in such a way that it fits on the front-side edge section 10 of the lens body 5 or can rest thereon.
- the lens body 5 can advantageously be cast on the said annular lens holder 7, for example, such that the front-side edge portion 10 of the lens body 5 is formed on a surface, for example, the flat side of the annular lens holder 7.
- the annular lens holder 7 can for example be inserted into a casting or injection mold for forming the lens body 5, so that it rests against a wall of the mold or forms part of the wall.
- the lens holder 7 is in this case formed on the forming lens body.
- the molded onto the lens body surface or the corresponding surfaces of the lens holder 7 in this case form its holding section 9.
- the side facing away from the lens body 5 or surface of the lens holder 7 forms the soldering portion 8, with which the lens holder 7 is soldered to the board.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Led Device Packages (AREA)
- Fastening Of Light Sources Or Lamp Holders (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011018931A DE102011018931A1 (en) | 2011-04-28 | 2011-04-28 | Lens, luminaire with such a lens and method for producing such a luminaire |
PCT/EP2012/001834 WO2012146390A2 (en) | 2011-04-28 | 2012-04-27 | Light and method for the production thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2702319A2 true EP2702319A2 (en) | 2014-03-05 |
EP2702319B1 EP2702319B1 (en) | 2015-07-01 |
Family
ID=46172758
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12723827.7A Not-in-force EP2702319B1 (en) | 2011-04-28 | 2012-04-27 | Light and method for the production thereof |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2702319B1 (en) |
DE (1) | DE102011018931A1 (en) |
WO (1) | WO2012146390A2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017209239A1 (en) * | 2017-05-31 | 2018-12-06 | Osram Gmbh | OPTICAL DEVICE, LIGHTING ARRANGEMENT, HEADLAMP AND METHOD |
DE102019109759A1 (en) * | 2019-04-12 | 2020-10-15 | HELLA GmbH & Co. KGaA | Method for producing a metal-plastic composite component and a metal-plastic composite component |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL178376C (en) * | 1978-06-19 | 1986-03-03 | Philips Nv | COUPLING ELEMENT WITH A LIGHT SOURCE AND A LENS. |
NL7904283A (en) * | 1979-05-31 | 1980-12-02 | Philips Nv | COUPLING ELEMENT WITH A LIGHT SOURCE AND A LENS-SHAPED ELEMENT. |
GB2391702B (en) * | 2002-06-07 | 2006-01-04 | Polymer Optics Ltd | Modular optical system |
EP2182275A1 (en) * | 2008-10-31 | 2010-05-05 | Osram Gesellschaft mit Beschränkter Haftung | A lighting module and corresponding method |
DE102008055936A1 (en) * | 2008-11-05 | 2010-05-06 | Osram Gesellschaft mit beschränkter Haftung | LED array |
-
2011
- 2011-04-28 DE DE102011018931A patent/DE102011018931A1/en not_active Withdrawn
-
2012
- 2012-04-27 WO PCT/EP2012/001834 patent/WO2012146390A2/en active Application Filing
- 2012-04-27 EP EP12723827.7A patent/EP2702319B1/en not_active Not-in-force
Also Published As
Publication number | Publication date |
---|---|
EP2702319B1 (en) | 2015-07-01 |
WO2012146390A3 (en) | 2013-01-10 |
WO2012146390A2 (en) | 2012-11-01 |
DE102011018931A1 (en) | 2012-10-31 |
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