• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a circuit board (1) having at least one LED (2) arranged thereon for a luminaire (3), the circuit board (1) having a layer formed from a sheet, in particular from an aluminum sheet, a steel sheet or a copper sheet. In this case, the layer has a first planar region (4) and a dimensionally stable bent region (5). By using the sheet of metal, a particularly suitable production of the board (1) is possible. For example, a "metal coil" can be used for this purpose; By unwinding the coil, a continuous production step can be realized in a particularly suitable manner. For this purpose, for example, the coil can simply be clamped on a reel and then unrolled. In this case, the board (1) through the dimensionally stable bent region (5) is particularly suitable as a supporting part of the lamp (3), for example as a housing of the lamp. In addition, a particularly effective heat dissipation of a heat generated by the LED (2) is made possible by this design. The board (1) can thus be used particularly suitable as a heat sink of the lamp (3) or for the LED (2).
    公开号:AT15970U1
    申请号:TGM150/2016U
    申请日:2016-06-21
    公开日:2018-10-15
    发明作者:Favarolo Angelo；Machate Andreas；Pöhs Mario
    申请人:Zumtobel Lighting Gmbh；
    IPC主号:
    专利说明:

    description
    LED BOARD FOR LIGHT, MANUFACTURING METHOD FOR SUCH A LED BOARD AND LAMP The invention relates to an LED board (LED: light-emitting diode) for a lamp, a manufacturing process for such a board, and a lamp with such a board. Here, a board of an electronic circuit is referred to as a board and a board with at least one LED arranged thereon is referred to as an LED board.
    It is known from the prior art to manufacture boards in a batch process. The carrier material (benefit) is coated, equipped and cut to size. So-called endless boards (Flexstripes) are manufactured in a batch process on foils, cut, soldered together at the ends, and rolled up to form continuous boards. One limitation is the length of the panels (600 mm) and the size of the plant (batch reactor). In general, the production is comparatively expensive and time-consuming.
    A lamp with an LED circuit board is also known from the prior art, in which the at least one LED forms a light source of the lamp. The luminaire has a luminaire housing, the LED circuit board being attached to the luminaire housing in a heat-conducting manner. The heat-conducting connection is important here because when the luminaire is in operation, the LED generates heat that is to be removed in order to ensure suitable operating conditions for the LED.
    Accordingly, in order to manufacture the lamp, the LED circuit board must be attached to the lamp housing in a heat-conducting manner in a process step. This process step requires a significant effort.
    The invention has for its object to provide an improved LED board for a lamp. In addition, a manufacturing process for a corresponding LED board is to be specified, as is a luminaire with such an LED board.
    In particular, with the LED circuit board with good thermal properties, easy manufacture of the lamp should be possible.
    This object is achieved according to the invention with the objects mentioned in the independent claims. Particular embodiments of the invention are specified in the dependent claims.
    According to the invention, a circuit board with at least one LED arranged thereon is provided for a lamp which has a layer formed from a sheet, in particular from an aluminum sheet, a steel sheet or a copper sheet. The location has a first flat area and a dimensionally stable curved area.
    The use of the sheet metal layer enables a particularly suitable production of the circuit board. For example, a so-called coil or metal coil, that is to say a sheet metal roll, for example a steel strip roll, can be used for this purpose; By unwinding the coil, a continuous manufacturing step can be implemented particularly suitably. For this purpose, the coil can, for example, simply be clamped on a reel and then rolled off.
    The circuit board is particularly suitable as a supporting part of the lamp, for example as a housing of the lamp due to the dimensionally curved area. The flat area is particularly suitable for connection to the LED. This design also enables particularly effective heat dissipation of heat generated by the LED. The circuit board can thus be used particularly suitable as a heat sink for the lamp or for the LED.
    [0011] The position is preferably configured to form the first flat area and the curved area in a coherent form. As a result, a particularly good / 17th
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    Dimensional stability and good dissipation of heat generated by the LED enables.
    The curved region preferably has a radius of curvature which is less than 10 mm, preferably less than 5 mm, the curved region being in particular designed such that an edge is formed by it. This makes it particularly suitable to achieve good stability of the board. In addition, this design is advantageous, for example, with regard to the suitability of the board as a luminaire housing.
    [0013] The layer preferably further has a second flat area which is arranged opposite the first flat area with respect to the curved area, the second flat area being the same size as or smaller than the first flat area, but at least as large is like 10%, preferably like 20% of the first planar area. This design makes the board particularly suitable as a housing for the lamp. The first flat area and the second flat area preferably delimit an angle which is greater than 40 ° and less than 140 °.
    Preferably, the circuit board forms at least essentially a profile-shaped component through which a profile axis is fixed, the bent region being bent about a bending axis oriented parallel to the profile axis. As a result, the circuit board is particularly suitable as a luminaire housing for an elongated luminaire, for example a so-called continuous line luminaire.
    Preferably, the layer also has a further dimensionally curved area, which is formed with respect to the first flat area opposite the first dimensionally curved area, the at least one LED being arranged on the first flat area. In this way, the circuit board can be designed particularly suitable as a protective element of the at least one LED.
    Preferably, the position in a cross section normal to the profile axis is at least substantially symmetrical with respect to a central plane, the at least one LED preferably being arranged lying on the central plane. The board is particularly suitable as a symmetrical luminaire housing, which is particularly suitable for heat dissipation on two opposite sides.
    According to a further aspect of the invention, a lamp is provided with a circuit board according to the application. An outer surface area of the lamp is preferably formed by a surface area of the circuit board. This is particularly advantageous with regard to good thermal properties of the luminaire for dissipating heat which is generated by the at least one LED when the luminaire is in operation.
    Preferably, a housing of the lamp is formed by the circuit board. In this way, a particularly effective heat emission to the surroundings of the lamp can be achieved. In addition, this simplifies the manufacture, since instead of two different components, namely the housing and the LED board, only one component, namely the LED board according to the application, has to be manufactured.
    Preferably, the luminaire further has a light influencing element for influencing a light emitted by the at least one LED, the light influencing element being arranged held on the circuit board.
    According to a still further aspect of the invention, a method for producing a circuit board with at least one LED arranged thereon for a lamp is provided, which comprises the following steps: Has formed layer of metal, in particular from an aluminum sheet, a steel sheet or a copper sheet, b) creating a dimensionally stable bent area of the layer by bending the semi-finished product, c) cutting the semi-finished product to form a profile element and d) attaching at least one LED on one Surface of the profile element. In particular, the steps are carried out in the following order: a), b), c), d).
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    Patent Office [0021] By using the roll or a coil, a continuous production step can be implemented particularly suitably. In particular, the layer can be bent in a particularly suitable manner in a continuous manner. This facilitates the manufacture of the board. As a result, easier manufacture of the lamp is made possible.
    Preferably, the semi-finished product wound on the roll is a sheet metal coil provided with a lacquer layer. The lacquer layer is particularly designed in such a way that it is suitable as a dielectric. The lacquer layer can be applied to a first surface of the sheet metal coil; a further lacquer layer can be applied to a second surface of the sheet metal coil opposite the first surface.
    The method preferably also has the following step: e) forming a conductor track of the circuit board, step e) either taking place before step a) or between steps a) and b) or between steps b) and d ). In step d), the LED is also electrically connected to the conductor track, in particular using a soldering furnace.
    For example, it can be provided that in step e) the conductor track is formed in that it is applied to or onto a dielectric by means of a printer or a plasma jet. The dielectric can be, for example, the lacquer layer mentioned above. It can preferably be provided that a layout, in particular a layout of the conductor track, is engraved in advance with a laser.
    Preferably, the board is a board according to the application.
    According to a still further aspect of the invention, a method for producing a circuit board with at least one LED arranged thereon for a lamp is provided, which has the following steps: a) unwinding a semi-finished product wound on a roll, the one from a sheet metal layer formed from metal, in particular from an aluminum sheet, a steel sheet or a copper sheet, c) cutting the semi-finished product to form a carrier element and d) attaching at least one LED to a surface of the carrier element. In particular, the steps are carried out in the following order: a), c), d). In contrast to the above-mentioned method, the carrier element can be designed flat, so it does not have to have a correspondingly curved area; therefore the expression "support element" is selected here instead of "profile element". Otherwise, the two parts mentioned correspond. In addition, the method can be designed analogously to the method mentioned above.
    The invention is explained below using an exemplary embodiment and with reference to the drawings. Show it:
    1, 2, 3, 4, a perspective sketch of a luminaire according to the application with an LED board according to the application, a cross-sectional sketch of the luminaire, a corresponding cross-sectional sketch of the LED Circuit board and a light influencing element held thereon, a corresponding cross-sectional sketch of the separated LED circuit board and [0032] FIGS. 5 to 12 sketches for processes of a method according to the application for producing the circuit board.
    Fig. 1 shows a perspective sketch of a lamp 3 according to the application. The lamp 3 can in particular - as shown - be an elongated lamp which extends along a longitudinal axis L. In particular, the luminaire 3 can be a so-called beam luminaire, which is provided for generating a so-called light band and which is designed to mechanically and electrically with a (in the Figu3 / 17
    AT15 970U1 2018-10-15 Austrian
    Patentamt ren not shown) to be connected to the mounting rail. In the example shown in FIG. 1, the lamp 3 has a so-called rotary tap 31 for this purpose.
    Fig. 2 shows a cross-sectional sketch normal to the longitudinal axis L. The lamp has a circuit board 1 with at least one LED 2 arranged thereon, also referred to here briefly as an LED circuit board. 4, the circuit board 1 with the LED 2 arranged thereon is outlined in a corresponding cross section in a separate form.
    The circuit board 1 is preferably designed as a profile-like component, so that a profile axis P is defined, which is preferably oriented parallel to the longitudinal axis L. A plurality of LEDs 2 are preferably arranged on the circuit board 1, in particular along a row parallel to the longitudinal axis L or the profile axis P.
    In addition, the lamp 3 can have an operating device 32, in particular in the form of a converter or driver, which is used to provide an electrical current for a power supply to the at least one LED 2.
    The circuit board 1 has a layer formed from a sheet metal. The layer has a first flat area 4 and a dimensionally stable curved area 5. With dimensionally stable bent it should be expressed that the area 5 in question has an intended curved shape and is bent in such a way that it is inherently stable that this shape is maintained if no external force acts on it or only gravity. In particular, the curved area has an elastic behavior, so that after a deflecting force has ended, the intended curved shape is automatically assumed again.
    Preferably, the design is such that the circuit board 1 mainly consists of the layer. In particular, the position can form a shape-forming framework, particularly preferably the only shape-forming framework of the circuit board 1. The circuit board 1 can consist of the layer and at least one layer arranged thereon, which serves to form a conductor track of the circuit board and / or represents a lacquer layer. This will be discussed in more detail below.
    In particular, the mechanical stability of the position is selected such that the circuit board 1 is suitable as a supporting component of the lamp 3, in particular as a housing of the lamp 3, in short lamp housing. In particular, the flat area 4 is also designed to be correspondingly stable. In the example shown, a housing of the lamp 3 is formed by the circuit board 1.
    For example, it can be provided that the layer consists of an aluminum sheet or a steel sheet or a copper sheet. For example, it can be provided that the thickness of the layer is at least 0.5 mm, particularly preferably at least 1 mm.
    Preferably, the bent region 5 - as is the case in the example shown - is bent about a bending axis oriented parallel to the profile axis P.
    In particular, the design is such that the position of the first planar region 4 and the curved region 5 is configured in a coherent form.
    Preferably, the curved area 5 has a radius of curvature that is less than 10 mm, particularly preferably less than 5 mm, the curved area 5 being designed in particular in such a way that - as sketched by way of example in FIG. 4 - one Edge is formed.
    As is the case with the example shown, the layer preferably also has a second planar region 6, which is arranged opposite the first planar region 4 with respect to the curved region 5. The second flat area 6 is preferably the same size or smaller than the first flat area 4, but at least as large as 10%, particularly preferably 20%, of the first flat area 4. As can be seen, for example, from FIG. 1, the example shown extends the second flat area 6 through a part of the circuit board 1, which forms an outer surface area of the lamp 3. This is advantageous because in this way a heat generated during the operation of the LED 2 can be released particularly effectively into a surrounding area or outside area of the lamp 3.
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    Patent Office As indicated in FIG. 4, in the example shown, the first flat area 4 and the second flat area 6 delimit an angle a which is approximately 90 °. In general, it is preferably provided that the first flat area 4 and the second flat area 6 delimit an angle α which is greater than 40 ° and less than 140 °. Thus, one of the two flat areas, here the first flat area 4, can be used as a suitable area for the protected arrangement of the LED 2 and the other, here the second flat area 6, for designing an outer surface of the luminaire, via which a particularly suitable heat emission is made possible .
    [0046] In addition, the layer preferably also has a further dimensionally stable curved region 7, which, with respect to the first flat region 4, is formed opposite the first dimensionally stable curved region 5.
    The at least one LED 2 is arranged on the first flat area 4. A protected area for the LED 2 can thus be formed in a particularly suitable manner.
    Furthermore, the position in a cross section normal to the profile axis P is preferably at least substantially symmetrical, with reference to a central plane E - sketched in FIG. 4 by way of example, the at least one LED 2 preferably being arranged on the central plane E. is. This is advantageous with regard to the design of the circuit board 1 as a luminaire housing.
    [0049] Furthermore, the layer preferably has a third flat region 9, which is formed opposite the first flat region 4, in particular with reference to the further dimensionally stable region 7. As is the case with the example shown, the design can advantageously be such that the first planar region 4, the second planar region 6 and the third planar region 9 are U-shaped in a cross section normal to the longitudinal axis L or profile axis P. is formed with two U-legs and a connecting leg connecting the two U-legs to each other, the two U-legs being formed by the second planar region 6 and the third planar region 9 and by the first planar region 4 the connecting leg. Thus, a particularly suitable protected inner region 10 for arranging the LED 2 can be formed by the circuit board 1 and two opposite outer regions of the luminaire by the two U-legs for a particularly effective heat emission. For example, the third flat area 9 can be designed symmetrically with respect to the central plane E to the second flat area 6.
    As can be seen, for example, from FIG. 2, the luminaire in the example shown also has a light influencing element 8 for influencing a light emitted by the at least one LED 2. The light influencing element 8 is arranged held on the circuit board 1. For this purpose, the circuit board 1 is preferably designed in such a way that it has holding elements 11, 12 which are designed to hold the light influencing element 8, in particular in the form of latching elements for producing a latching connection, by means of which the light influencing element 8 is held on the circuit board 1. 3, the LED circuit board with the light influencing element 8 held thereon is outlined. For example, the holding elements 11, 12 - as sketched - can be designed such that they each have a V-shaped cross section. For this purpose, the light influencing element 8 can have two corresponding latching lugs 81, 82. This design enables a particularly simple assembly of the light influencing element 8 on the circuit board 1. The holding elements 11, 12 can advantageously be formed by continuations of the second flat area 6 and the third flat area 9.
    In the example shown, the first flat region 4 of the circuit board 1 extends through a circuit board region which has two opposite surface regions, a first surface region 13 and a second surface region 14, the at least one LED 2 being arranged on the first surface region 13 is. In the example shown, the lamp 3 is intended to be aligned for operation in such a way that the first surface area 13 points downward and the second surface area 14 points upward. The design is such that the luminaire 3 emits the light generated by the LED 2 downwards. Accordingly, the lamp 3 is particularly suitable as a ceiling lamp.
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    The two U-legs also point downward in this orientation of the circuit board 1.
    As can be seen from FIG. 1 in connection with FIG. 2, the lamp 3 can also be designed such that the operating device 32 is arranged opposite the at least one LED 2 with respect to the first planar region 4, in particular on the second Surface area 14 of the circuit board 1, that is, in the orientation considered here, on the upper side of the circuit board area, through which the first flat area 4 of the layer extends. The rotary tap 31 can also be arranged on the second surface area 14. Furthermore, the luminaire 3 can have, for example, a cable holder 33 and / or a connection terminal for a cable on the second surface area 14, which is provided, for example, for supplying power to the LED 2.
    As can be seen from FIG. 1, the lamp mainly consists of the circuit board 1.
    Furthermore, the circuit board 1 can be designed such that it has two connecting structures 15, 16, which are provided for holding the lamp 3 on the above-mentioned mounting rail.
    It can further be provided that end parts (not shown in the figures) are arranged or are arranged on the two end regions of the circuit board 1 which are defined by the profile axis P.
    In the example shown, the circuit board 1 thus represents an integral part of a supporting part of the lamp 3 or a housing of the lamp 3. The circuit board 1 is designed in such a way that it has profiled areas on two opposite sides, on the one hand, the fastening serve on the mounting rail and on the other hand the mounting of the light influencing element 8. The profiled areas of the circuit board 1 thus comprise on the one hand the connecting structures 15, 16 for mounting the lamp 3 on the mounting rail and on the other hand the holding elements 11, 12 for generating the latching connection for mounting the Light influencing element 8. The profiled areas are preferably each formed by a plurality of bends in the layer, each of which is bent about bending axes oriented parallel to the profile axis P.
    A method for producing the circuit board 1 is preferably provided, which comprises the following steps: a) Unwinding a semi-finished product wound on a roll, which has a layer of metal formed from a sheet, in particular from an aluminum sheet, a steel sheet or a copper sheet, b) creating a dimensionally stable bent region 5 of the layer by bending the semi-finished product, c) cutting the semi-finished product to form a profile element and d) attaching at least one LED 2 to a surface 13 of the profile element. The following sequence is particularly provided: a), b), c), d).
    In step a) in particular the semi-finished product wound on a roll can be provided in the form of a coil. In particular, a sheet can be provided as a semifinished product that has a lacquer layer, for example a one-sided lacquer layer or two-sided lacquer layers. The lacquer layer or one of the two lacquer layers can advantageously serve to form an outer surface of the lamp 3. This is particularly advantageous with regard to effective heat emission or heat radiation to the environment. In addition, it can advantageously be used as a dielectric for forming a conductor track of the circuit board 1.
    Furthermore, it can advantageously be provided that the coil is unwound and treated or processed horizontally in a production line for producing the lamp housing, in particular by stamping and / or embossing and / or the formation of beads and / or rollers. In this way, the stability and the desired, intended shape of the circuit board 1 described above can be generated in a particularly suitable manner. Furthermore, it can be provided that the semi-finished product treated in this way is cut off, so that profile elements are formed which represent pieces of luminaire, so to speak.
    [0060] The method preferably also has the following step: e) forming a conductor track of the circuit board 1, step e) either taking place before step a) or between
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    Patent Office steps a) and b) or between steps b) and d). In step d), the LED 2 is also electrically connected to the conductor track, in particular using a soldering furnace. It can be provided that the luminaire pieces formed by the cutting in step c) are fed to the soldering furnace in a batch process and are equipped with the at least one LED 2 there.
    [0061] It is of course possible to provide for a lamp to be produced which comprises a method for producing the circuit board 1 in accordance with the application. In this way, a particularly advantageous manufacturing method for the lamp 3 is made possible.
    The fully assembled boards can then be fed to a final assembly, in which the light influencing element 8, the operating device 32, the rotary tap 31, the cable holder 33, the end parts and / or the connecting terminal are optionally mounted. In addition, electrical connections can be made during final assembly.
    For example, to form the conductor track, it can be provided that a circuit board foil is laminated onto a shaped and cut semifinished product or a piece of luminaire. The circuit board film can be designed in such a way that it forms a dielectric, the conductor track and a solder resist.
    It can be provided that a partial area of the circuit board 1, for example the second flat area 6 of the layer, is not provided with a conductor track.
    5 to 12 show sketches of possible sequences in a method according to the application. The rectangular boxes mean procedural steps, the chronological sequence from left to right being shown. The starting point is always - as symbolized by a circle, a metal coil. The arrows c shown above the boxes refer to a continuous process section, the arrows b to a process section in a batch operation.
    The letters or letter combinations given in the circles or boxes have the following meanings:
    M1: Metal coil, pre-painted on one or both sides
    M2: metal coil, completely pre-assembled
    M3: metal coil, with metal - dielectric - homogeneous copper layer, backside possibly, pre-painted
    M4: metal coil, with foil laminated on one or both sides
    S: punching / embossing
    W: Rolling / Profiling
    X: cutting
    LF: lamination: flex circuit board (bare conductor tracks including dielectric and
    Solder resist)
    B: Assembly in the soldering furnace
    Q: Luminaire manufacturing
    LV: Laminating pre-assembled conductor foil
    P: photoresist layout, e.g. B. Screen printing roller
    G: exposure, etching bath
    K: Solder mask
    LD: Laminating two foils: dielectric and copper or a composite foil, e.g. B.
    Polyamide / copper (polyamide larger than copper)
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    Patent Office In the etching bath, for example, iron (III) chloride, sodium sulfate or ammonium persulfate can be used.
    In addition, the cutting can be provided after assembly, z. B. with the help of a mobile soldering furnace or a clocked production line.
    The following advantages can be achieved in particular with an LED circuit board according to the application or a luminaire according to the application or a method according to the application:
    • The circuit board forms the housing of the lamp.
    • The housing of the luminaire formed by the patine can dissipate the operational heat generated by the LED particularly well.
    • The circuit board forms fastening elements, for example by punching or beads, on which lighting parts can be fastened, for. B. terminals, drivers, batteries, end pieces.
    • The metal coil allows the lamp to be manufactured particularly cost-effectively.
    • In contrast to the previous state of the art, a circuit board as an extra part and thus fastening it is no longer necessary.
    • The heat transfer from the LED to the housing can be designed almost ideally - pure heat conduction within the material.
    • Because of the connection to the housing, the back of the board does not have to be ideally smooth for good heat transfer.
    • Painted surfaces of the housing or the board radiate the heat well.
    • The board can act as a heat sink.
    • Pre-painted sheet metal can be used, so no subsequent painting or coating is necessary.
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    权利要求:
    Claims (17)
    [1]
    Expectations
    1. Circuit board (1) with at least one LED (2) arranged thereon for a lamp (3), comprising a layer formed from a sheet, in particular from an aluminum sheet, a steel sheet or a copper sheet, characterized in that the layer has a first flat area (4) and a dimensionally stable curved area (5).
    [2]
    2. Board according to claim 1, characterized in that the position of the first planar region (4) and the curved region (5) is designed in a coherent form.
    [3]
    3. Circuit board according to claim 1 or 2, characterized in that the curved region (5) has a radius of curvature which is less than 10 mm, preferably less than 5 mm, the curved region (5) being designed in particular in such a way that an edge is formed.
    [4]
    4. Board according to one of the preceding claims, characterized in that the layer further comprises a second flat area (6) which is arranged opposite the first flat area (4) with respect to the curved area (5), the second flat area Area (6) is the same size as or smaller than the first flat area (4), but is at least as large as 10%, preferably as 20% of the first flat area (4).
    [5]
    5. Board according to claim 4, characterized in that the first flat region (4) and the second flat region (6) limit an angle (a) which is greater than 40 ° and less than 140 °.
    [6]
    6. Circuit board according to one of the preceding claims, characterized in that the circuit board (1) at least essentially forms a profile-shaped component by which a profile axis (P) is fixed, the bent region (6) being parallel to the profile axis ( P) oriented bending axis is bent.
    [7]
    7. Circuit board according to claim 6, characterized in that the layer further has a further dimensionally stable curved area (7), which is formed with respect to the first flat area (4) opposite to the first dimensionally stable curved area (5), the at least one LED (2) is arranged on the first flat area (4).
    [8]
    8. The circuit board according to claim 6 or 7, characterized in that the position viewed in a cross section normal to the profile axis (P) with respect to a central plane (E) is at least substantially symmetrical, the at least one LED (2) preferably is arranged lying on the central plane (E).
    [9]
    9. lamp (3), characterized by a circuit board (1) according to one of the preceding claims.
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    [10]
    10. A method for producing a circuit board (1) with at least one LED (2) for a lamp (3) arranged thereon, comprising the following steps:
    a) unwinding of a semi-finished product wound on a roll, which has a layer of metal formed from a sheet, in particular from an aluminum sheet, a steel sheet or a copper sheet,
    b) creating a dimensionally stable bent region (5) of the layer by bending the semi-finished product,
    c) cutting the semi-finished product to form a profile element and
    d) attaching at least one LED (2) to a surface of the profile element, in particular in the following order: a), b), c), d).
    7 sheets of drawings
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    公开号 | 公开日
    DE102016204993A1|2017-09-28|
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    引用文献:
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    法律状态:
    2022-02-15| MM01| Lapse because of not paying annual fees|Effective date: 20210630 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102016204993.3A|DE102016204993A1|2016-03-24|2016-03-24|LED board for luminaire, production method for such an LED board and luminaire|
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