EP2521876A1 - Dispositif d'éclairage à del et procédé de production d'un dispositif d'éclairage à del - Google Patents

Dispositif d'éclairage à del et procédé de production d'un dispositif d'éclairage à del

Info

Publication number
EP2521876A1
EP2521876A1 EP11741532A EP11741532A EP2521876A1 EP 2521876 A1 EP2521876 A1 EP 2521876A1 EP 11741532 A EP11741532 A EP 11741532A EP 11741532 A EP11741532 A EP 11741532A EP 2521876 A1 EP2521876 A1 EP 2521876A1
Authority
EP
European Patent Office
Prior art keywords
led
cover
support
lighting device
carrier
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
EP11741532A
Other languages
German (de)
English (en)
Other versions
EP2521876B1 (fr
Inventor
Harald Dellian
Thomas Preuschl
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.)
Osram GmbH
Original Assignee
Osram GmbH
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 Osram GmbH filed Critical Osram GmbH
Publication of EP2521876A1 publication Critical patent/EP2521876A1/fr
Application granted granted Critical
Publication of EP2521876B1 publication Critical patent/EP2521876B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F21V3/00—Globes; Bowls; Cover glasses
    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/02—Globes; Bowls; Cover glasses characterised by the shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/27—Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/66—Details of globes or covers forming part of the light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/90—Methods of manufacture
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/10—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings 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
    • F21V17/101—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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • 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
    • F21V31/00—Gas-tight or water-tight arrangements
    • F21V31/005—Sealing arrangements therefor
    • 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
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the invention relates to an LED lighting device, in particular LED tube lamp.
  • the invention further relates to methods for producing an LED lighting device.
  • LED tube lamps lamps with a tubular outer contour, which typically have a plurality of light-emitting diodes (LEDs) as their light sources
  • a space is very limited. Due to the required electronics (driver) for driving the LEDs, the lateral distance between a support for placing an LED carrier fitted with the LEDs and the LEDs is also critical.
  • an optics for light distribution, in particular light scattering is required in order to avoid an inhomogeneous light distribution, which is caused by the use of the LEDs as point light sources.
  • an LED lighting device comprising an LED support, which is equipped at its front with at least one LED and is fixed with its back to a support, wherein the front of the LED support of an electrically insulating, translucent and diffused cover (the "LED cover”). is arched and the LED cover is arched over by a seated on the support protective cover.
  • the LED cover thus serves both as electrical insulation or Abde ⁇ submerged (supplement cover) as well as an optical element for light distribution.
  • Such an LED lighting device fulfills a variety of electrical standards, in particular for operating the LEDs in a non-SELV configuration (the at least partially translucent protective cover can also serve as an electrical base cover and consist of an electrically insulating material). a configuration in which at least the LEDs are operated with a voltage which is higher than a safety extra-low voltage).
  • the protective cover may be transparent or diffused.
  • the design as a diffuser enhances a Homogenisie ⁇ tion of the incident light.
  • the LED cover is formed from a body, which also forms an intermediate layer between the back of the LED carrier and the support (which may also be designed as a heat sink).
  • the LED cover may also be used or formed as an intermediate layer between the back of the LED carrier and the overlay. Since the material of the LED cover is electri- cally insulating, it reaches as an intermediate layer to a ⁇ additional electrical isolation of the LED carrier relative to the support. Due to the one-piece design further components can be saved, and it is even simpler ⁇ chere mounting possible.
  • the LED cover is preferably good heat-conducting through its thickness to a thermal contact resistance low and to keep heat dissipation from the LEDs to the heat sink high. This can be achieved in that the material in bulk form has good thermal conductivity and / or has a correspondingly small thickness (is thin).
  • a body can be understood to mean a body whose expansion in a plane is far greater than its thickness.
  • a particularly thin sheet may also be referred to as a film.
  • the rolled sheet can in particular have a hollow cylindrical basic shape, namely Example ⁇ as having a circular cross-sectional profile, an OVA len cross-sectional profile, a polygonal cross-sectional profile, egg ⁇ nem freeform-like cross-sectional profile, etc.
  • the rolled-up sheet abuts one another on a (flat or linear) abutting region and forms one along its longitudinal axis, around which the sheet is rolled, about the longitudinal axis of circumferentially closed body.
  • a portion of the LED carrier can be circumferentially surrounded by the electrically insulating, flexible body. This increases electrical protection.
  • the rolled-up form which can be achieved, for example, by a suitable bending of the sheet, simplifies assembly.
  • the rolled-up LED cover can press against each other at the butt portion without being firmly joined together. It is advantageous for preventing inadvertent release of the abutting portion that the rolled-up LED cover is fixedly connected at its abutting portion. It is a development which is advantageous for preventing unintentional release of the leaf-shaped LED cover at its abutting area, that the side edges are conclusively interconnected, in particular welded together (in particular laser welded) or glued. In particular, the welding has the advantage that it causes a hot deformation of the material of the LED cover in the joint area, which causes a solid connection by standards. As a result, an encapsulated unit ge ⁇ forms, which reduces a number of possible clearance and creepage distances.
  • the support has at least one mounting recess for receiving a portion of the LED cover.
  • the mounting recess may include, for example, at least one groove in the support, in which the material of the LED cover can be inserted and / or clamped.
  • the LED cover may be in the form of a rolled sheet, which at least partially protrudes at its outside over its impact area and press-fitted into ⁇ infected with at least a portion of the free edge of the projecting region in a longitudinal groove in the support is.
  • the LED cover may thus be plugged into the on position ⁇ particular by means of only one edge or at least one latching projection.
  • the free edge can be shaped to fit evenly or structured, for example provided with defined projections. Another mechanical fixation is achieved by the contact pressure of the LED carrier, this in turn, for example, by hold-down, plastic rivets, mechanical fasteners, etc.
  • the LED cover can in particular have a non-closed contour or shape and, for example (if the end offe ⁇ NEN) form cavity for the LED carrier equipped with a composite of the support.
  • the LED cover can then be secured to the support, in particular with at least a portion ih ⁇ rer free edges.
  • the LED cover can, for example, be slipped over the LED carrier be.
  • the LED cover can for example be incorporated ⁇ infected with opposed free edges in two parallel grooves of the platen.
  • the LED cover can in particular have an at least approximately half hollow cylindrical cross-sectional shape.
  • the width of the LED cover also determines their curvature.
  • the LED cover can be flexible or substantially rigid (only slightly flexible and / or self-supporting). Particularly in the case of the substantially rigid embodiment, a rotationally symmetric shape is also possible, for example a spherical segment-shaped LED cover.
  • the LED cover can generally be made of a plastic.
  • the LED cover may further be provided with opaque aperture areas to selectively shape a shape of emergent light rays.
  • an exit angle of the light ⁇ (aperture) can be influenced. This may be advantageous, for example, in the case of special lamps for reading, playing music, etc.
  • the aperture areas can be formed for example by a metallization or another reflective layer of the LED cover. It is still an embodiment that at least on a front side of the LED carrier present tracks by means of ei ⁇ ner track cover directly (ie without a distance or cavity) are covered. As a result, the creepage distances can be extended to increase electrical protection.
  • the conductor track cover made of glass or a glassy material.
  • the glass (or glassy material) can be applied, for example, by means of a (glass) printing process and then, for example, baked in the LED carrier.
  • a high temperature resistant base ⁇ material of the LED support is preferred, in particular a Kera ⁇ mik, eg alumina or aluminum nitride.
  • the interconnect cover substantially covers the entire front of the LED carrier au ⁇ ßer Halb the LEDs. This extended creepage be ⁇ Sonder reliable.
  • a thermally conductive heat conducting material in particular TIM ("Thermal Interface Mate ⁇ rial", eg, a thermal grease or réelleleitpaste or réelleleitkleber), in particular ⁇ a special heat-conductive adhesive, is present between the back of the LED support and the support.
  • TIM Thermal Interface Mate ⁇ rial
  • ⁇ a thermal grease or réelleleitpaste or réelleleitkleber in particular ⁇ a special heat-conductive adhesive
  • the LED cover can be used, for example, in a recess in the support, in which also the LED support is received. In particular, if the recess has a stu ⁇ fen shame boundary, the cover can use the limitation as a stop for their exact positioning.
  • the support may have a dedicated mounting recess, eg longitudinal grooves for inserting the LED cover.
  • the LED cover can be clamped or glued therein, eg by means of adhesive dispensing.
  • the LED carrier has a base body made of an electrically insulating ceramic (eg aluminum oxide, aluminum nitride, etc.). Ceramics generally have a high penetration resistance.
  • the use of an LED carrier with a ceramic base body allows operation of the LEDs with a higher than a low voltage or Protection voltage ("Non-SELV" control).
  • the LED support may, for example, have a main body made of a printed circuit board base material, eg FR4 (particularly inexpensive) or a metal core board (particularly good heat spreading).
  • the support has at least one recess with a stepped edge for insertion of the LED carrier and the LED cover. This can facilitate positioning of the LED cover. Also, the stepped edge or the step specifically in ei ⁇ ner LED cover in the form of a rolled sheet whose shape specifically affect, for example, force a bend in an area of the stage. It is also an embodiment that the LED lighting device is an LED tube retrofit lamp. An LED tube retrofit lamp is provided for replacement of a tubular lamp, such as a fluorescent tube, a line lamp, etc. It is advantageous if the support is a heat sink.
  • the LED carrier and the LED cover are then preferably of elongated shape.
  • the LED carrier can be band-shaped, the cover cylindrical or cylindrical cut-shaped and / or the support cylindrical section, in particular semi-cylindrical, be configured.
  • the LED lighting device is not limited to a configuration as a tube lamp.
  • the object is also achieved by a method for herstel ⁇ len an LED lighting device in which the LED cover forms an intermediate position between the back of the LED carrier and the support, or is formed of a body, wel ⁇ cher also an intermediate layer forms between the back of the LED carrier and the pad.
  • the method comprises Minim ⁇ least the following steps:
  • the underlying portion of the LED cover is pressed in particular on the support and thereby fixed.
  • the application of the LED cover and the placement of the LED carrier is preferably done so that on one side of the LED support a comparatively wide portion of the LED cover to flip over the LED support and on the other side of the LED support a comparatively narrow portion of the LED cover protrudes to make the abutting portion (or contact portion).
  • the attachment of the folded portion may be e.g. be achieved by plugging the LED cover in a mounting recess of the support or by connecting the LED cover to the joint area.
  • the object is also achieved by a method for herstel ⁇ len an LED lighting device in which the LED cover is formed of a body which does not also forms would be an intermediate position between the back of the LED carrier and up.
  • the procedure has at least the following steps:
  • the arrangement of the LED cover can be achieved, in particular, by inserting the LED cover into a recess of the support with a step-shaped edge, which also serves to receive the LED support.
  • the rim can then serve as a side stop for the LED cover to accurately position it.
  • the fixing of the LED carrier to the heat conduction material can generally be done by means of the heat conduction material, for example if the heat conduction also serves as an adhesive, or by other means, such as screws or hold-down, for example, if the heat conduction material itself does not serve the attachment, for example in one embodiment as sauceleit ⁇ cushion ("TIM pad") or heat conduction.
  • the fastening of the LED cover can be carried out in particular on the support, in particular by means of a Kle ⁇ bewulst. in the following figures, the invention will be described schematically with reference to exemplary embodiments. Identical or identically acting Ele ⁇ elements may be provided with the same reference numerals for clarity.
  • FIG. 3 shows a sectional view in frontal view ei ⁇ nen section of an LED tube lamp according to a third embodiment
  • Fig.l shows an LED tube lamp 1, which in particular as a retrofit lamp for conventional tube lamps such as a fluorescent tube, a line lamp, etc. is usable.
  • the LED tube lamp 1 has a substantially cylindrical or tubular basic shape whose longitudinal axis in the ge Service ⁇ th representation is perpendicular to the image plane. At the ends of the LED tube lamp 1 cover caps for mechanical and / or electrical connection of the lamp with a corresponding version of a lamp can be (o.Fig.).
  • the LED tube lamp 1 has in its lower half, namely the cross-section approximately semicircular filling, a support in the form of a heat sink 2.
  • the heat sink 2 may have, for example, cooling fins.
  • An upper side 3 of the heat sink 2 directed upwards in this view has a recess 4 which is rectangular in cross-section at its center, ie the recess 4 extends in a straight line in a plane perpendicular to the image plane.
  • a LED carrier 5 Introduced into the recess 4 is a LED carrier 5, which is equipped on its upper side or front side 6 with a plurality Leuchtdi ⁇ diodes (LEDs) 7 and conductors 8 or occupied.
  • the light-emitting diodes 7 are preferably arranged equidistantly in a row in the longitudinal direction of the LED tube lamp 1.
  • the interconnects 8 connect, for example, the LEDs 7 together and with an electronic control.
  • the conductor tracks 8 are covered by a conductor track cover 9 made of glass or a glassy material, so that a creepage distance K to the LEDs 7 at least up to a lateral edge of the conductor track cover 9, indicated here by the distance K, extends.
  • the LED carrier 6 On its rear side 10, the LED carrier 6 rests on a layer of a thermal adhesive 11 on a bottom of the recess 4.
  • the populated LED carrier 5 is arched over its entire length by an LED cover 12, which also in the Recess 4 is seated, in such a way that it presses laterally against a stepped edge 13 of the recess 4, so that the stepped edge 13 simultaneously represents a lateral stop for the LED cover 12.
  • the LED cover 12 consists of an electrically insulating, transparent and diffusely scattering material, so that the LED cover 12 simultaneously serves as electrical insulation and as an optical diffuser.
  • the inner side facing the LED carrier 5 may be partially covered by an opaque diaphragm layer 14, e.g. a metallization, so that light from the LEDs only passes through a released from the aperture layer 14 window 15.
  • the LED cover 12 may be made of plastic, realized here, for example in the form of a semicircular cylindrical plastic body, wherein the LED cover 12 is here before ⁇ preferably self-supporting and only slightly elastic bendable. As a result of the elastic flexibility of the LED cover 12, it can be pressed in laterally on both sides and then inserted into the recess 4, the LED cover 12 springing back laterally after a termination of the two-sided introduction of force, and thus by a press fit in the recess 4 can be held.
  • Adhesive 17 applied, for example by dispensing a first liquid and then curing adhesive.
  • the upper side 3 of the heat sink 2 is overarched as a whole by a (transparent or diffusely scattering) protective cover 16.
  • the protective cover 16 has a substantially semicircular cylindrical cross-sectional shape and sets plus an outer contour flush with the heat sink 2 at.
  • the outer contour of the heat sink 2 and the outer contour of the protective cover 16 together form at least substantially a cylindrical surface.
  • the protective cover 16 can be glued as examples game with the cooling body 2 and, in Example ⁇ edge-side longitudinal grooves (o.Abb.) Of the heat sink 2, which serve as a mounting recess, to be inserted.
  • the protective cover 16 is also made of an electrically insulating material and causes the LED carrier 5 is double-protected with the LEDs 7 and printed conductors 8 located on its upper side together with the LED cover 12. As a result, especially electrically critical air gaps can be avoided.
  • the LED tube lamp 1 can be produced inter alia by first dispensing the thermal adhesive 11 in the recess 4. Then the populated LED carrier 5 is pressed with its rear side 10 onto the thermal adhesive 11, and it is waited until the thermal adhesive 11 is cured, so that the LED carrier 5 securely adheres to the heat sink 2. In a following step, the LED cover 12 is inserted into the recess 4 and then glued by the adhesive bead 17 with the heat sink 2.
  • the protective cover 16 can be placed on the heat sink and fastened there.
  • the still open ends of the result up to then resulting LED tube lamp 1 can be provided with corresponding caps for mechanical and / or electrical contact.
  • the LEDs 7 emit light through the window 15, wherein an approximately dazzlingför ⁇ mige light distribution at the location of the LEDs 7 is homogenized by the diffusely scattering property of the LED cover 12.
  • the exiting through the window 15 the light beam passes on through the protective cover 16, wherein the Schutzabde ⁇ ckung 16 when it also includes a beam-forming property, for example by integrated therein Linsenberei- surface, for example, to focus or widen the light beam passing through it.
  • the waste heat generated by the LEDs 7 is transmitted to the heat sink 2 by the LED carrier 5 and the thermal adhesive 11. Due to the fact that the heat-conducting adhesive 11 has a low thermal resistance and, moreover, can be applied very thinly, the heat from the LED carrier 5 can be transmitted to the heat sink 2 substantially unhindered.
  • the LED carrier 5 preferably has here a base material made of ceramic (alumina, aluminum nitride, etc.), so that it first electrically very well insulated, has a high dielectric strength, has a high heat resistance, which in particular in a plot of the conductor ⁇ track cover 9 is advantageous from glass and also has a very good thermal conductivity, so that the Leuchtdi ⁇ oden 7 are very effective coolable.
  • 2 shows a LED fluorescent lamp 21 according to a second ⁇ guide die.
  • the LED cover 22 is now designed so that it serves as the intermediate layer 27 at the same time.
  • the LED cover 22 consists of an originally rectangular sheet (a body whose thickness is considerably smaller than its planar extent) made of an electrically insulating, translucent and diffusely scattering material, in particular plastic.
  • the LED cover 22 is subsequently transferred to a rolled-up state shown here in which a contact or abutting portion 23 is formed by the LED cover 22, on which two portions of the LED cover 22 collide.
  • the rolled-up state can be achieved not only by a rolling movement but also by any other bending of the sheet, for example by large-scale bending along one or more bending lines.
  • the LED cover 22 has been so mon ⁇ advantage that initially the LED cover 22 forming sheet is placed on the heat sink, so that it covers the Ausspa ⁇ tion 4.
  • the LED supporter 5 is inserted with its rear side 10 in the recess 4 and (to serve serving as the intermediate layer 27) to the located in the support 2 of the LED cover 22 pressed, for example by Nie ⁇ derhalter or other fasteners. Since the LED carrier 5 is narrower than the recess 4, a narrow portion 24 of the LED cover 22 remains free on one side, and on the other side a wide portion 25 of the LED cover 22 remains free. Due to the stepped edge 13 of the recess 4 of the narrow portion 24 and the wide Ab ⁇ section 25 are bent up there. The narrow portion 24 thus has an obliquely upwardly directed, preferably out of the recess 4 looking out free side edge.
  • the wide portion 25 is simply bent over the populated LED support 5 and inserted with its free edge past the free edge of the narrow portion 24 in a trained as a longitudinal groove mounting recess 26 in the surface 3 of the heat sink 2.
  • the end surfaces remain open until then, but can be suitably closed, for example by contracting or compressing, so that the LED cover 22 for the LED carrier 5 essentially (up to, for example, surface-size ver ⁇ negligible feedthroughs for fasteners or electrical lines) is enclosed on all sides.
  • the impact area is maintained solely by the mechanical pressure of the narrow portion 24 on the wide portion 25, no post-processing on the abutment portion 23 is required.
  • the mounting recess 26 and / or the free lateral edge of the wide portion 25 may be provided prior to insertion of the free edge in the mounting recess 26 with an adhesive to prevent inadvertent release of the LED cover 22, 25 from the mounting recess 26 safely.
  • the wide section 25 of the LED cover 22 can be easily brought over the populated LED carrier 5 ( in particular in the case of a substantially elastically deforming blade, which is preferably also self-supporting), or the broad portion 25 can be plastically bent in sections along defined bending lines (in particular in the case of a plastically bending blade).
  • These mechanical properties of the LED cover 22 can be adjusted, for example, by a selection of a material, in particular plastic, with suitable mechanical bulk properties and / or by a choice of a layer thickness d.
  • the thickness d of the LED cover 22 is reduced only in the region which is arranged below the LED carrier with respect to the region covering the LEDs. This ensures a mechanically stable overlap of the LEDs as well as a good heat dissipation. For more effective heat dissipation, it is generally preferred that the material of the LED cover 22 is thermally well thermally conductive.
  • the LED cover 22 (Fig. O.) Can be cut at least in their broad base 25 having an aperture layer, in particular metallization ⁇ tion, be equipped.
  • 3 shows in a view analogous to Figure 2 a section representation of an LED fluorescent lamp 31 according to a third exporting ⁇ approximate shape, wherein the position of the cutout in Figure 2 by dashed lines analogous to the drawn circle lies.
  • the section shows a joint region 33 of an LED cover 32.
  • the LED fluorescent lamp 31 is at least similar in structure to the tubes ⁇ lamp 21 except that the narrow portion 34 and the wide portion 35 is connected firmly to one another in the joint region 33rd As a result, the mounting recess 26 can be omitted.
  • the solid compound can be accomplished, for example, by a plastic fiber welding process.
  • the narrow portion 34 is so narrow that it is completely in the bottom of the recess 4 of the heat sink 2 be ⁇ , preferably so that its free edge abuts the supply ⁇ stepped edge 13 of the recess 4, so that a Precise positioning of the free edge and thus the LED cover 32 can be carried out very easily.
  • the narrow portion 34 lies flat on the bottom of the recess 4, so that the free lateral edge of the wide portion 35 can also be easily placed in the recess 4 above the schma ⁇ len section 24, wherein the graduf ⁇ te edge 13 as a lateral stop is used.
  • an at least line-shaped, preferably broad impact area or contact area is formed, which is easily accessible by a laser beam L for welding the two sections 34, 35.
  • This method can also be carried out particularly easily and also has the advantage that the welding method forms a connection that is electrically sealed in terms of standard technology.
  • the LED lighting device is not limited to use with LED tube lamps. It can rather the described invention be constructed nut ⁇ zen and thus also differently designed LED lamps.
  • the invention is not limited to use with a lamp, but may include, for example, LED modules and LED lights.
  • the heat sink instead of ge ⁇ showed dedicated heatsink a LED tube lamp also be a part of an LED luminaire, this particular point loading that 7 does not just let the LEDs replace standardized, which, however, in view of the long lifetimes LEDs 7 may not be a significant problem.
  • the lamp may be a table lamp, wall lamp or desk lamp, which may also have a cylindrical basic shape.
  • the invention is not intended to be elongate, e.g. cylindrical, lighting devices limited, but may also take any other form, e.g. with rotationally symmetrical covers, as long as only the double cover with the LED cover and the protective cover over the LEDs can be implemented.
  • the material of the LED cover can have, for example, PC, ABS and / or PMMA.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Manufacturing & Machinery (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)

Abstract

L'invention concerne un dispositif d'éclairage à DEL (1) comprenant un porte-DEL (5) qui est pourvu d'au moins une DEL (7) sur la face avant (6) et qui est fixé sur un support (2) par la face arrière (10). La face avant (6) du porte-DEL (5) est recouverte d'une structure de recouvrement de DEL (12) concave électro-isolante qui est perméable à la lumière et présente une dispersion diffuse, et cette structure de recouvrement de DEL (12) est elle-même recouverte d'une protection (16) concave disposée sur ledit porte-DEL (5).
EP11741532.3A 2010-07-02 2011-06-22 Dispositif d'éclairage à del et procédé de production d'un dispositif d'éclairage à del Not-in-force EP2521876B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010030863A DE102010030863A1 (de) 2010-07-02 2010-07-02 LED-Leuchtvorrichtung und Verfahren zum Herstellen einer LED-Leuchtvorrichtung
PCT/EP2011/060414 WO2012000860A1 (fr) 2010-07-02 2011-06-22 Dispositif d'éclairage à del et procédé de production d'un dispositif d'éclairage à del

Publications (2)

Publication Number Publication Date
EP2521876A1 true EP2521876A1 (fr) 2012-11-14
EP2521876B1 EP2521876B1 (fr) 2016-02-24

Family

ID=44630007

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11741532.3A Not-in-force EP2521876B1 (fr) 2010-07-02 2011-06-22 Dispositif d'éclairage à del et procédé de production d'un dispositif d'éclairage à del

Country Status (5)

Country Link
US (1) US8919992B2 (fr)
EP (1) EP2521876B1 (fr)
CN (1) CN102971576B (fr)
DE (1) DE102010030863A1 (fr)
WO (1) WO2012000860A1 (fr)

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Also Published As

Publication number Publication date
US20130094200A1 (en) 2013-04-18
EP2521876B1 (fr) 2016-02-24
WO2012000860A1 (fr) 2012-01-05
CN102971576B (zh) 2015-11-25
US8919992B2 (en) 2014-12-30
CN102971576A (zh) 2013-03-13
DE102010030863A1 (de) 2012-01-05

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