EP2417387A1 - Beleuchtungseinheit für fahrzeugscheinwerfer und fahrzeugscheinwerfer - Google Patents
Beleuchtungseinheit für fahrzeugscheinwerfer und fahrzeugscheinwerferInfo
- Publication number
- EP2417387A1 EP2417387A1 EP10715753A EP10715753A EP2417387A1 EP 2417387 A1 EP2417387 A1 EP 2417387A1 EP 10715753 A EP10715753 A EP 10715753A EP 10715753 A EP10715753 A EP 10715753A EP 2417387 A1 EP2417387 A1 EP 2417387A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- lighting unit
- mounting board
- unit according
- metal
- 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
- F21V25/00—Safety devices structurally associated with lighting devices
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/19—Attachment of light sources or lamp holders
- F21S41/192—Details of lamp holders, terminals or connectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/40—Cooling of lighting devices
- F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
- F21S45/48—Passive cooling, e.g. using fins, thermal conductive elements or openings with means for conducting heat from the inside to the outside of the lighting devices, e.g. with fins on the outer surface of the lighting device
-
- 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 a lighting unit according to the preamble of patent claim 1 and a vehicle headlight with such a lighting unit.
- Such a lighting unit is disclosed for example in WO 2008/065030 Al.
- This document describes a lighting unit for a vehicle headlight with a light emitting diode device and a metallic housing, which at least partially surrounds the light emitting diode device and which is provided with fastening means for mounting the lighting unit in a vehicle headlight.
- These fastening means are designed such that they allow alignment of the LED chips with respect to the optics of the vehicle headlight.
- the metallic housing can be connected to a cooling body for cooling the light-emitting diode chips and serve for the electromagnetic shielding of components of an operating circuit arranged therein.
- the production of the metallic housing is comparatively complicated and costly.
- the lighting unit according to the invention for vehicle headlights has a light emitting diode device, a housing and a mounting board on which components of an operating circuit for operating the light emitting diode device are arranged, wherein the housing and the mounting board form an interior.
- the mounting board has an electrically conductive inner layer which is connected to a ground reference potential of the operating circuit, and on the surface of the mounting board at least one electrical contact surface is arranged, which contacts with the aforementioned electrically conductive inner layer and with electromagnetic shielding means of the housing purpose electromagnetic shielding of the interior is connected.
- inner layer means that the mounting board of the illumination unit according to the invention is multi-layered and the aforementioned electrically conductive inner layer is an intermediate layer which is arranged between the upper side and the lower side of the mounting board in order to be able to apply thereon conductor tracks or electrical contacts for components, thereby enabling bilateral assembly of the assembly board with components.
- the electrically conductive inner layer and the shielding means of the housing which are connected via the at least one electrical contact surface on the surface of the mounting board with the aforementioned electrically conductive inner layer, cause a cost-effective electromagnetic shielding of the housing interior, since the housing due to these measures of plastic, For example, in injection molding, and can not be designed as a metal housing.
- those components of the operating circuit of the light emitting diode device are preferably arranged, which generate during operation signals with high frequency component, which could interfere with the radio or television reception in the vehicle or electronic systems.
- the at least one electrical contact surface is arranged at least on one side of the mounting board.
- the at least one electrical contact surface also extends beyond the edge of the mounting board to the other side of the mounting board to ensure good connection to the electromagnetic shielding means and the ground reference potential electrically conductive layer of the mounting board.
- the at least one electrical contact surface is arranged only on one side of the mounting board.
- the aforementioned electrically conductive inner layer lying at ground reference potential is preferably over the entire extent of the mounting surface. Board extending layer of preferably multi-layered mounting board.
- the electrical contacting of this inner, lying on ground reference potential layer with the at least one electrical contact surface of the mounting board can be carried out in an advantageous manner by means of one or more metallic pins, which are inserted into through holes in the mounting board in the region of the annular electrical contact surface.
- the above-mentioned separate contact surfaces may for example be advantageously arranged along the edge of the mounting board.
- the at least one, arranged on the surface of the mounting board electrical contact surface is preferably annular, that is, the electrical contact surface preferably forms a closed curve, which particularly preferably along the edge or in the vicinity of the edge of the Mounting board runs.
- the term "ring-like” thus includes not only ring-shaped and annular, but also other shaped closed curves, such as ovals and polygons.
- the shape of the ring-shaped contact surface is present Preferably determined by the shape of the edge of the mounting board.
- the housing consists of electrically insulating material, in particular of plastic, and the electromagnetic shielding means are formed as a metallization of the housing or of the housing portion enclosing the interior.
- the housing can be produced by means of plastic injection molding technology and a housing with an electromagnetically shielded interior can be realized in a particularly cost-effective manner by means of the abovementioned metallization.
- the aforementioned metallization is preferably formed as a metallic coating, which is preferably applied to the inside of the housing portion surrounding the interior.
- the metallic coating is preferably one or more layers of one or more of the metals of the group of aluminum, copper, brass, zinc, nickel, chromium and iron. Particularly preferred is an aluminum coating.
- a non-metallic, electrically conductive coating for example an indium tin oxide coating (ITO layer).
- the metallization advantageously also extends to a housing provided by the housing. formed bearing surface on which rests the mounting board with its electrical contact surface.
- the electrical connection between the contact surface of the mounting board and the metallization on the housing by means of an electrically conductive sealing ring, which is arranged between the housing and the mounting board, or by means of an electrically conductive contact ring can be made between the shielding and the at least one electrical contact surface is arranged on the surface of the mounting board.
- the aforementioned contact ring may be resilient or may be replaced by an electrically conductive spring element to ensure a secure electrical contact between the shielding and the at least one electrical contact surface.
- the shielding means may also comprise at least one metal sheet, metal mesh, metal mesh or a metal foil in order to ensure electromagnetic shielding of electrical components of the operating circuit arranged in the interior of the housing.
- the at least one metal sheet, metal mesh, metal mesh or the at least one metal foil is formed so that a receptacle for the shielded electrical components of the operating circuit is formed, and thereby together with the ground reference potential lying, electrically conductive layer of the mounting board an electromagnetically completely shielded room inside half of the housing is formed.
- the at least one metal sheet, metal mesh, metal mesh or the at least one metal foil is therefore formed cup-like.
- the at least one metal sheet, metal mesh, metal mesh or the at least one metal foil preferably consists of one or more of the metals from the group of copper, copper-zinc alloy, aluminum, stainless steel and galvanized steel.
- the housing is advantageously designed as a plastic injection-molded part and the at least one metal sheet, metal mesh, metal mesh or the at least one metal foil is encapsulated by the housing material or is partially embedded in the housing material by means of injection molding technology.
- the at least one metal sheet, metal mesh, metal mesh or the at least one metal foil is advantageously at least one electrical contact surface of the mounting board. Additionally or alternatively, the at least one metal sheet, metal mesh, metal mesh or the at least one metal foil may also be connected via a metallic heat sink to the ground reference potential of the operating circuit. Preferably, the at least one metal sheet, metal grid, metal braid or the at least one metal foil is at several points with the ground reference potential of the operating Circuit connected to ensure good electromagnetic shielding.
- the at least one metal sheet, metal mesh, metal mesh or the at least one metal foil are preferably fixed to the mounting board by means of a technique from the group of flanging, laser welding, gluing, soldering and press fit, in order to secure the mounting board in the housing and a reliable electrical Contact between the at least one electrical contact surface of the mounting board and the at least one metal sheet, metal mesh, metal mesh or the at least one metal foil to ensure.
- the electromagnetic shielding means may also comprise a housing section surrounding the interior of the housing and made of electrically conductive plastic.
- the aforementioned housing section made of electrically conductive plastic advantageously forms a contact surface for the at least one electrical contact surface, in order to allow a simple electrical connection of this housing section to the ground reference potential of the operating circuit.
- One or more of the lighting units according to the invention are preferably used as a light source in a vehicle headlight in order, for example, to generate the fog light or daytime running light.
- Figure 1 An illustration of all components of the lighting unit according to the first embodiment of the invention in an exploded view of the lighting unit
- Figure 2 is a side view of the housing of the illumination unit shown in Figure 1
- Figure 3 is a front view of the housing shown in Figure 2
- FIG. 4 A rear view of the housing depicted in FIGS. 2 and 3
- FIG. 5 shows a side view of the metallic heat sink of the lighting unit illustrated in FIG.
- FIG. 6 is a front view of the metallic heat sink shown in FIG.
- FIG. 7 A perspective view of the metallic heat sink depicted in FIGS. 5 and 6
- FIG. 8 shows a side view of the primary optics of the illumination unit illustrated in FIG Figure 9 is a perspective view of the lighting unit shown in Figure 1 in the assembled state of all its components
- Figure 10 is a perspective view of the mounting board and the LED chip of the in FIG.
- Figure 11 shows a cross section through the illumination unit shown in Figure 9 in a schematic representation
- Figure 12 is a schematic, partially sectioned view of the heat sink and the mounting board of the illumination unit shown in Figure 11
- Figure 13 is a perspective view of the lighting unit according to the second embodiment of the invention.
- FIG. 14 shows a cross section through the illumination unit depicted in FIG. 14
- the lighting unit according to the first exemplary embodiment of the invention has a housing 200 embodied as a plastic injection molded part, a metallic heat sink 100 made of aluminum, a sealing ring 300 made of rubber or silicone, a mounting board 400 with electrical components (not shown) and printed conductors (not shown) as well as contact surfaces (not shown), a light-emitting diode device 500 and a primary optics 600.
- FIG. 1 shows an exploded view drawn representation of the lighting unit with its individual components. In the following, the aforementioned components of this lighting unit and their interaction will be described in more detail.
- the housing 200 is in one piece and designed as a plastic injection molded part. It has a hollow-cylindrical housing section 210 and a housing section 230 designed as a plug.
- the hollow-cylindrical housing section 210 has a circular-cylindrical side wall 211 and a bottom 212. The inside of the bottom 212 and the circular cylindrical side wall 211 is provided with a metallization 240 in the form of an aluminum coating.
- the hollow cylindrical housing portion 210 has an outer diameter of 50 millimeters.
- the circular-cylindrical side wall 211 is provided with three elevations 213a, 213b, 213c arranged equidistantly along its outer lateral surface and at the same height above the floor 212, which project outwardly from the lateral surface and which serve as adjustment means for aligning the illumination unit in the vehicle headlight.
- these three protrusions 213a, 213b, 213c define a reference outer diameter of the hollow cylindrical housing portion 210 for the alignment of the illumination unit in the vehicle headlight.
- the upper edge 214 of the hollow cylindrical housing portion 210 is provided with three equidistant along the circumference of the hollow cylindrical housing portion 210 arranged webs 214a, 214b, 214c. These three webs 214a, 214b, 214c form Ringsegmen- te, which are integrally formed on the upper edge 214 of the circular cylindrical side wall 211, are arranged on a radius and extending in the direction of the cylinder axis of the circular cylindrical side wall 211.
- the width of these webs 214a, 214b, 214c corresponds to the width or extent of the elevations 213a, 213b, 213c along the outer circumferential surface of the circular cylindrical side wall 211.
- the webs 214a, 214b, 214c are arranged along the circumference of the circular-cylindrical side wall 211 at the same locations as the protrusions 213a, 213b, 213c.
- the upper edges of the three webs 214a, 214b, 214c define a plane which is perpendicular to the cylinder axis of the hollow cylindrical housing portion 210 and serves as a reference plane for alignment of the light-emitting diode device 500.
- the formed as a plug housing portion 230 is formed off-center on the bottom 212 of the hollow cylindrical housing portion 210 on the back.
- the bottom 212 has a circular disk-shaped opening 215 arranged coaxially with the cylinder axis of the hollow-cylindrical housing section 210, through which a columnar section 110 of the metallic heat sink 100 projects.
- the bottom 212 is equipped on the inner side of the hollow-cylindrical housing section 210 with three pins 216a, 216b, 216c, which are arranged equidistantly along the edge of the circular disk-shaped opening 215 and which are flat. extend parallel to the direction of the cylinder axis of the hollow cylindrical housing portion 210. These pins 216 a, 216 b, 216 c abut against a circular cylindrical portion 111 of the columnar portion 110 of the metallic heat sink 100 and serve to align the metallic heat sink 100 in the plastic housing 200.
- the pins 216 a, 216 b, 216 c ensure a play-free fit of the metallic heat sink 100 in the housing 200 and prevent movement of the metallic see heat sink 100 in all directions perpendicular to the cylinder axis of the hollow cylindrical housing portion 210.
- the bottom 212 is provided on the inside with three further pins 217, which are also parallel to the cylinder axis of the hollow cylindrical housing portion 210 extend and serve to fix the mounting board 400.
- the tapered ends of these pins 217 protrude through openings 401 in the mounting board 400 and are hot caulked at the top, that is, at the side facing away from the bottom 212 of the mounting board 400.
- the circular cylindrical side wall 211 has on its inner side an annular collar 218, on which the sealing ring 300 and the mounting board 400 rest (FIG. 11).
- the metallization 240 of the inside of the side wall 211 extends from the bottom 212 to the height of the collar 218 and additionally extends to the mounting surface 400 formed by the collar 218 for the mounting board 400.
- the bottom 212 is also equipped with two hollow webs 219, 220 which extend parallel to the cylinder axis of the hollow cylindrical GeHouseab- section 210 and are arranged diametrically on the edge of the circular disc-shaped aperture 215. These Webs 219, 220 are used to fix the primary optics 600.
- a plurality of metal pins 221, 222 which are electrically conductively connected to electrical connections of the lighting unit embedded in the plug 230, protrude from the floor 212 and protrude through openings 402 in the mounting board 400 and are soldered or welded to printed conductors or contact surfaces on the mounting board 400 or contacted by Pressfit or press-in zone.
- the electrical connections are furthermore connected to metallic contact pins 222, which protrude from the plastic material of the plug 230 and are accessible on the rear side of the lighting unit or of the housing section 230 designed as a plug.
- the bottom 212 has on the outer side or rear side of the hollow cylindrical housing portion 210 a mating recess 223 for a disk-shaped portion 120 of the metallic heat sink 100.
- This recess 223 is bounded by a circular arc-shaped wall portion 224 and a rectilinear wall portion 225.
- a pressure compensation hole 227 is further attached, which allows in particular in closed systems, a pressure compensation in the vehicle headlight.
- This pressure equalizing hole 227 is optional and can be covered by a pressure compensating diaphragm (not shown).
- the metallic heat sink 100 is composed of a columnar portion 110 and a disk-shaped portion 120 formed at one end of the columnar portion 110.
- the rear side 120a of the disk-like section 120 of the metallic heat sink 100 facing away from the columnar section 110 serves as a bearing surface for an external cooling system.
- the columnar portion 110 has a circular-cylindrical portion 111 which directly adjoins the disk-shaped portion 120.
- the edge of the disk-shaped section 120 is formed by a circular-arc-shaped edge section 121 and a straight edge section 122.
- the straightforward running edge portion 122 of the heat sink 100 abuts the rectilinear wall portion 225 in the recess 223.
- the columnar portion 110 of the heat sink 100 protrudes through the opening 215 in the bottom 212 of the hollow cylindrical housing portion 210 and the circular cylindrical portion 111 is free of play on the pin 216a, 216b, 216c.
- the columnar portion 110 has at its end a plane parallel to the disk-shaped portion 120 extending, planar mounting surface 112, which is bounded by two mutually parallel side edges 113, 114. On this mounting surface 112, the light emitting diode device 500 is adhered by means of a placement machine in well-defined orientation.
- a temperature sensor is arranged and thermally coupled by means of thermally conductive paste to the heat sink. The temperature sensor monitors the temperature of the light emitting diode device 500 during operation of the lighting unit.
- a metal spring 450 is arranged, which acts with spring action against a ground reference Potential lying electrical contact 411 on the mounting board 400 presses (Fig. 12). As a result, the metallic heat sink 100 is electrically connected to the ground reference potential.
- the sealing ring 300 is made of rubber or silicone and rests on the collar 218 on the inside of the circular cylindrical side wall 211. It serves to seal the illumination device in a vehicle headlight or a lamp.
- the mounting board 400 is formed in a circular disk shape and has a central opening 403 through which the columnar portion 110 of the metallic heat sink 100 projects with the light-emitting diode device 500 fixed thereon.
- the mounting board 400, the circular-cylindrical side wall 211 and the bottom 212 of the hollow-cylindrical housing section 210 form an interior space.
- electrical components (not shown) of an operating circuit for operating the light emitting diode array 500 are arranged and optionally interconnected by interconnects, which are also arranged on the mounting board 400.
- the mounting board 400 On the front side 430 of the mounting board 400 are printed conductors (not shown) and electrical contact surfaces (not shown) for contacting the light-emitting diode device 500 and optionally arranged further components of the operating circuit, which can not cause high-frequency noise during their operation.
- the mounting board 400 is multi-layered and has in addition to the traces on the front and Rear side, an inner metal layer 410 which is embedded in the electrically insulating material of the mounting board 400 and connected to the ground reference potential of the operating circuit for the light emitting diode device 500 in order to increase the electromagnetic compatibility of the lighting unit.
- the aforementioned inner ground reference potential metal layer 410 extends over the entire extent or diameter of the mounting board 400 and, together with the above-described metallization 240 on the inside of the bottom 212 and side wall 211, forms an electromagnetic shield of the interior of the hollow cylindrical housing section 210 of the lighting unit according to the first embodiment of the invention.
- the mounting board 400 has an annular electrical contact surface 440, which is connected in an electrically conductive manner to the inner metal layer 410 lying at ground reference potential.
- the annular electrical contact surface 440 is disposed on the surface of the mounting board 400 at least on the bottom side 212 of the mounting board 400 and abuts against the metallized bearing surface of the collar 218, so that the metallization 240 of the collar 218 and the inside of the floor 212 and Sidewall 211 is electrically connected to the inner metal layer 410 and the ground reference potential of the operating circuit.
- the annular electrical contact surface 440 also extends beyond the edge of the mounting board 400 to the other, remote from the bottom 212 side 430 of the mounting board 400. In Figure 10, this extension of the annular electrical contact surface 440 on the side 430 of the mounting board 400 shown schematically.
- the annular electrical contact surface 440 which is designed as a metallic coating, in particular as a copper conductor, extends to one of the two outer metal pins 222.
- the metal pin 222 pierces both the annular electrical contact surface 440 and the inner metal layer 410 of the mounting board 400 and thereby establishes an electrically conductive connection between the annular electrical contact surface 440 and the inner metal layer 410.
- the lying on ground reference potential inner metal layer 410 of the mounting board 400 is thus contacted by means of the metal pin 222 at least to one side 430 of the mounting board 400, but preferably to both sides 420, 430 of the mounting board 400.
- so-called vias in the mounting board can be used to make an electrically conductive connection between the inner metal layer 410 of the mounting board and the annular contact surface 440.
- metallic heat sink 100 is also preferably at ground reference potential in order to further improve the electromagnetic shielding or to connect other components of the luminaire or of the vehicle headlight, in which the lighting unit is inserted, to the ground reference potential via the rear side 120a of disk-shaped section 120 of metallic heat sink 100 to couple to the operating circuit. This allows the electromagnetic shielding be extended to the entire lamp or the entire vehicle headlights.
- the inner metal layer 410 is also through-contacted to the electrical contact surface 411 on the back side 420 of the mounting board 400, against which the metal spring 450 disposed in the recess 117 of the metallic heat sink 100 bears with a force fit and spring action.
- the metal spring 450 consists of a wire that is helically wound.
- the electrically conductive metal spring 450 is made of spring steel or copper.
- the metallic heat sink 100 is electrically conductively connected via the contact surface 411 and the inner metal layer 410 of the mounting board 400 to the ground reference potential of the operating circuit.
- helical metal spring 450 depicted in FIG. 12 it is also possible to use a metallic leaf spring.
- the components (not shown) of the operation circuit mounted on the back surface 420 of the mounting board 400 are disposed in the inner space formed by the side wall 211 and the mounting board 400.
- the inner metal layer 410 of the mounting board 400 and the metallization 240 on the inside of the bottom 212 and the side wall 211 of the hollow cylindrical housing portion 210 form an electromagnetic shield for the operating circuit components mounted on the back side 420 of the mounting board 400.
- the operating circuit has at its voltage input to a filter for high-frequency signals, such as a low-pass filter or a band-pass filter to attenuate spurious signals with frequencies greater than 0.15 MHz.
- the mounting board 400 is provided with three holes 401, which are arranged around the central opening 403. After assembly, the mounting board 400 sits on the pin 217, so that their tapered ends protrude through the openings 401. By hot caulking the tapered ends of the pins 217, the mounting board 400 is fixed to the housing 200.
- the mounting board 400 also has four further holes 402 which are arranged at its edge, above the plug-formed housing portion 230 and through which the metal pins 221, 222 protrude to an electrically conductive connection to contact surfaces on the front of the mounting board 400 to enable.
- the central opening 403 in the mounting plate 400 is designed so that holders 610, 620 of the primary optics 600 also project through the opening 403 and can engage in the hollow webs 219, 220.
- the light-emitting diode device 500 consists of five light-emitting diode chips, which are arranged on a carrier plate in a row and surrounded by the walls of a frame. These light-emitting diode chips are provided with a luminescent coating (chip layer coating), which partially converts the blue light generated by the light-emitting diode chips into light of other wavelengths, so that the lighting unit emits white light during its operation.
- the LED chips are For example, to thin-film light-emitting diode chips whose basic principle, for example, in the publication I. Schnitzer et al. , Appl. Phys. Lett. 63 (16), 18 October 1993, 2174-2176.
- the light-emitting diode device 500 is electrically conductively connected to electrical contacts on the mounting board 400 and is operated by means of the operating circuit whose components are arranged on the mounting board 400.
- the operating circuit supplies power to the LED chips 500 of the light-emitting diode device 500 and allows control of the electrical power consumption of the light-emitting diode device 500 as a function of the temperature of the light-emitting diode device 500 with the aid of the above-mentioned temperature sensor.
- the temperature sensor can be designed for this purpose, for example, as a temperature-dependent resistor, in particular as an NTC resistor with a negative temperature characteristic.
- the primary optics 600 is a transparent, dome-like cover of the light-emitting diode device 500 made of plastic or glass.
- the primary optics 600 has two hook-shaped holders 610, 620 which are inserted into the hollow webs 219, 220 and whose hooks 611, 621 engage behind the projections 229a, 229b there.
- the web 220 is provided with a slot having an oval cross section, while the web 219 has a cavity with a circular edge. Thereby can also be given a clear orientation for the primary optics 600. This is significant when the translucent dome-like cover 600 is replaced with primary optics with light directing properties. However, the dome-like cover 600 can also be omitted or replaced by a primary optics with imaging properties or optical fiber properties, which directs or bundles the light from the light emitting diode device in predetermined spatial directions.
- the lighting unit according to the second exemplary embodiment of the invention is shown schematically in FIGS. 13 and 14. It differs from the lighting unit according to the first embodiment essentially only by the electromagnetic shielding means and the shape of the sealing ring. In all other details, the lighting units according to the first and second embodiments agree. Therefore, in Figures 13 and 14 for components of the second illumination unit, which are identical to the corresponding components of the first illumination unit, the same reference numerals as in Figures 1 to 12 are used.
- the side wall 211 and the bearing surface of the collar 218 according to the first embodiment of the lighting unit according to the invention is in the lighting unit according to the second embodiment a formed as a deep-drawn part, cup-shaped metal sheet 240 ', for example, an aluminum sheet or a galvanized sheet steel or a brass sheet, as a shielding together with the electrically conductive metal tall slaughter 410 of the mounting board 400 used.
- cup-shaped metal sheet 240 ' has an annular, parallel to the bottom 212 aligned bearing surface on which the mounting board 400 rests with its annular electrical contact surface 440.
- the cup-shaped metal sheet 240 ' is provided with many hooks 241' which embrace the edge of the mounting board 400 in a crimping manner, so that the mounting board 400 is fixed to the cup-shaped metal sheet 240 '.
- the cup-shaped metal sheet 240 'and the inner metal layer 410 of the mounting board 400 form an electromagnetically shielded space into which the electrical components (not shown) of the operating circuit mounted on the underside 420 of the mounting board 400 protrude.
- the annular contact surface 440 has not been shown for the sake of simplicity.
- the mounting board 400 shown in FIGS. 13 and 14 has the structure shown in FIG. In particular, the extends annular contact surface 440 over the edge of the mounting board 400 on both sides 420, 430 of the mounting board 400.
- a silicone ring 300' is arranged, which is used to seal the lighting unit and a dome-like secondary optics (not shown), which is placed on the top or on the edge of the side wall 211.
- the silicone ring 300 ' has an L-shaped profile and lies on the collar 218 on the inside of the hollow cylindrical housing section 210 of the plastic housing 200 of the illumination unit.
- the invention is not limited to the above-described embodiments of the invention.
- the metallization 240 of the inside of the hollow cylindrical housing portion 210 according to the first embodiment of the invention and the cup-shaped metal sheet 240 'according to the second embodiment of the invention can be made as a shielding means of the hollow cylindrical housing portion 210 of electrically conductive plastic, together with the inner metal layer 410 of the mounting board 400 to ensure electromagnetic shielding of the housing interior.
- the hollow-cylindrical housing section 210 and the housing section 230 formed as a plug consist of different plastic materials, since an electrically insulating material is required for the housing section 230 formed as a plug due to the electrical connections embedded therein. Nevertheless, both housing sections 210 and 230 are manufactured as non-releasably interconnected plastic injection molded parts.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Fastening Of Light Sources Or Lamp Holders (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009016876.1A DE102009016876B4 (de) | 2009-04-08 | 2009-04-08 | Beleuchtungseinheit für Fahrzeugscheinwerfer und Fahrzeugscheinwerfer |
| PCT/EP2010/054105 WO2010115755A1 (de) | 2009-04-08 | 2010-03-29 | Beleuchtungseinheit für fahrzeugscheinwerfer und fahrzeugscheinwerfer |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP2417387A1 true EP2417387A1 (de) | 2012-02-15 |
| EP2417387B1 EP2417387B1 (de) | 2020-05-06 |
| EP2417387B8 EP2417387B8 (de) | 2020-07-22 |
Family
ID=42224306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP10715753.9A Not-in-force EP2417387B8 (de) | 2009-04-08 | 2010-03-29 | Beleuchtungseinheit für fahrzeugscheinwerfer und fahrzeugscheinwerfer |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US8870426B2 (de) |
| EP (1) | EP2417387B8 (de) |
| JP (1) | JP5260792B2 (de) |
| CN (1) | CN102388264B (de) |
| DE (1) | DE102009016876B4 (de) |
| WO (1) | WO2010115755A1 (de) |
Families Citing this family (56)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5397785B2 (ja) | 2011-08-01 | 2014-01-22 | 株式会社デンソー | 3相回転機の制御装置 |
| DE102011085655A1 (de) * | 2011-11-03 | 2013-05-08 | Osram Gmbh | Beleuchtungseinrichtung mit Halbleiterlichtquellen |
| CN104041204B (zh) * | 2012-02-03 | 2017-09-08 | 飞利浦照明控股有限公司 | 照明驱动器和具有配置用于直接连接至电路接地的内部电磁屏蔽层的壳体 |
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- 2010-03-29 JP JP2012503961A patent/JP5260792B2/ja not_active Expired - Fee Related
- 2010-03-29 CN CN2010800157099A patent/CN102388264B/zh not_active Expired - Fee Related
- 2010-03-29 EP EP10715753.9A patent/EP2417387B8/de not_active Not-in-force
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Also Published As
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|---|---|
| JP5260792B2 (ja) | 2013-08-14 |
| CN102388264B (zh) | 2013-10-16 |
| DE102009016876A1 (de) | 2010-10-14 |
| EP2417387B1 (de) | 2020-05-06 |
| US20120020104A1 (en) | 2012-01-26 |
| CN102388264A (zh) | 2012-03-21 |
| JP2012523657A (ja) | 2012-10-04 |
| US8870426B2 (en) | 2014-10-28 |
| EP2417387B8 (de) | 2020-07-22 |
| WO2010115755A1 (de) | 2010-10-14 |
| DE102009016876B4 (de) | 2019-09-05 |
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