• 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 printed circuit board (100, 100 ', 200, 200') for receiving at least one light-emitting diode, comprising at least on one side of the printed circuit board an insulating region (140, 140 ', 240, 240'), which has an air gap and creepage distance between the conductor tracks (120, 120 ', 220', 220 ') arranged on the printed circuit board (100, 100', 200, 200 ') and the outer circumference of the printed circuit board (100, 100', 200, 200 '), wherein at least one of the Insulation regions (140, 140 ', 240, 240') has a tongue and groove means (150, 160, 150 ', 160'; 250, 260) which with a corresponding tongue and groove means (150, 160, 150 250, 260) of a further printed circuit board (100, 100 ', 200, 200') can be brought into engagement in such a way that the respective insulation regions (140, 140 '; 240, 240') providing the air and creepage distances ) at least partially overlap.
    公开号:AT14683U1
    申请号:TGM95/2014U
    申请日:2014-03-05
    公开日:2016-04-15
    发明作者:Piere Angelo Ing Favarolo
    申请人:Zumtobel Lighting Gmbh；
    IPC主号:
    专利说明:

    description
    LADDER PLATE WITH SPECIAL CLUTCH RANGE
    1. FIELD OF THE INVENTION
    The present invention relates to a (linear) circuit board for receiving at least one light emitting diode and a printed circuit board assembly, in particular a lighting means.
    2. BACKGROUND
    A variety of printed circuit boards for receiving light emitting diodes is known from the prior art. In such printed circuit boards there is generally the need to effectively dissipate the heat generated by the light-emitting diode during operation, in order to enable efficient and long-lasting light emission by the light-emitting diode.
    In general, therefore, there is a tendency to perform as large as possible on the PCB printed circuit tracks, since these tracks are usually formed of copper, and thus provide a comparatively high thermal conductivity in order to abzutransportie¬ren the heat generated by the light-emitting diodes. Furthermore, it is known to arrange various heat sinks on the circuit boards in order to additionally dissipate the heat caused by the light-emitting diodes.
    Another aspect to be considered in the design of printed circuit boards for light emitting diodes is that a minimum spacing be provided between the individual conductive areas to prevent inadvertent short circuits. On the one hand, this can lead to a so-called creeping discharge and, on the other hand, to an air short circuit between adjacent conductive regions. This minimum distance between two adjacent conductive regions is therefore referred to as so-called clearance and creepage distance. If the printed circuit board is arranged on a conductive heat sink, an air gap and creepage distance may also be provided between the printed conductors and the outer circumference of the printed circuit board. Usually, an air gap and creepage distance in the form of an insulation area of between 2 and 3 mm is provided between the conductor tracks and the outer circumference of a printed circuit board in order to prevent an unintentional short circuit across the heat sink.
    Be circuit boards, which have a standard clearance and creepage distance between 2 and 3 mm in the edge region, connected in series or in series, for example, to form a großflächige lighting device, the air and Kriechstrecken add up in the connection area. In other words, the air gap and creepage distance between the conductor tracks of adjacent printed circuit boards usually doubles to 4 to 6 mm in the connection area of two printed circuit boards.
    This doubling of the creepage distance and clearance between two adjacent printed circuit boards results in less efficient heat removal in the connecting regions of two printed circuit boards since the heat dissipating printed conductors are thereby relatively far apart.
    Furthermore, the doubling of the creepage distance and creepage distance in the connecting areas between two printed circuit boards results in the fact that the light-emitting diodes are no longer regularly distributed, and therefore an inhomogeneous lighting impression can result for the user.
    Starting from this prior art, the present invention has the object to provide a printed circuit board for light-emitting diodes, which provides a sufficient clearance and creepage distance between the conductor tracks and the outer circumference, both in the connected state of two circuit boards as well as in the case the circuit board is used alone.
    These and other objects, which will become apparent upon reading the following description or may be recognized by those skilled in the art, are achieved by the subject-matter of the independent claims. The dependent claims further form the central idea of the present invention in a particularly advantageous manner.
    3. DETAILED DESCRIPTION OF THE INVENTION
    The printed circuit board according to the invention serves to receive at least one light emitting diode and comprises at least on one side an isolation region which provides an air gap and creepage distance between the conductor tracks arranged on the printed circuit board and the outer circumference of the printed circuit board. According to the invention, at least one of the insulation regions has at least one tongue and groove means which can be brought into engagement with a corresponding tongue and groove means of another printed circuit board in such a way that the respective isolation regions providing the creepage and clearance paths at least partially overlap.
    An inventive spring-groove means can be provided in a simple embodiment as a straight tongue and as an undercut into which a corresponding straight Zun¬ge another circuit board can be inserted. Seen in cross-section, the spring-groove means are thus formed step-shaped, wherein spring and groove preferably each comprise half of the printed circuit board cross section or Leiter¬plattendicke. When connecting two printed circuit boards, a straight tongue of one printed circuit board is inserted into the corresponding undercut of the other printed circuit board and vice versa. In other words, the isolation areas or the creepage distances and clearances of two adjacent printed circuit boards are no longer lined up but pushed into each other.
    Also conceivable are more complex structures of the spring-groove means, as long as they are educated so that corresponding spring-groove means of two printed circuit boards ineinan-dergreifen and can partially overlap. Other than in the said simple step-shaped configuration of the spring-groove means also spring-groove means can be provided, which also prevent a vertical and / or horizontal displacement of the printed circuit boards in the connected state relative to each other. This can, for example, by a cross-section centrally arranged Fe¬der and a corresponding centrally arranged groove.
    Due to the formation of the insulation area with / as tongue and groove means there is thus the possibility of preventing or at least considerably reducing an otherwise usual doubling of the creepage distance between two adjacent printed circuit boards.
    In contrast, if a printed circuit board according to the invention is used individually, i. not used in combination with another printed circuit board, nevertheless a sufficient air and creepage distance can be provided, since in this case the tongue and groove means serve as an air and creepage distance.
    An inventive spring-groove means thus allows telescoping two nebenachbarter printed circuit boards such that they provide a combined air and creepage distances, which has a reduced compared to the prior art extent.
    By the intermeshing of two corresponding spring-groove means adjacent printed circuit boards and the tracks of adjacent circuit boards are positioned closer to each other, so that due to the higher thermal conductivity of the tracks and the resulting heat during operation of the LEDs more effectively from the edge or Verbin¬dungsbereichen the circuit boards can be removed.
    This more effective removal of heat has a positive effect on the life of the arranged in the edge region light emitting diodes on the one hand and on the other hand, on the light output, which is highly temperature-dependent in light-emitting diodes.
    Finally, by the intermeshing of corresponding tongue and groove means, and the corresponding reduction of the creepage distance and clearance between two adjacent printed circuit boards, the light-emitting diodes of two adjacent printed circuit boards can be provided with the desired regular spacing or with a substantially smaller deviation This results in a homogeneous light impression for the user, without disturbing illumination errors in the connecting areas of two printed circuit boards.
    In a preferred embodiment of the air gap and creepage distance bereitstel¬lende isolation region between the circuit boards arranged on the printed circuit board and the outer circumference of the circuit board is between 1 mm and 5 mm, preferably between 1.5 and 4 mm and more preferably between 2 and 3 mm.
    Due to the high voltage often used, the (minimum) length of the creepage distance and creepage distance of a printed circuit board in practice is usually between 2 and 3 mm. This order of magnitude of the creepage distance and creepage distance is to be selected in particular when at the rear the circuit board is provided a metallic heat sink. With the printed circuit board according to the invention can thus be prevented in an air gap and creepage distance bzw.einem isolation region of a printed circuit board of 3 mm that a kom¬binierte creepage and creepage distance in the connecting region of two printed circuit boards of 6.
    Preferably, the tongue-and-groove means has substantially the same length or width (as the extent from the end of the printed circuit board having the tongue-and-groove means to the (nearest) trace) as the isolation region, i. the spring-groove means occupies substantially the entire isolation area. This provides the possibility of providing a relatively large area for the spring or groove, which in turn increases the stability of two connected printed circuit boards.
    Of the nearest trace of the circuit board to the adjacent tongue and groove means is only a minor area (protection area) preferably between 0.1 and 0.8 mm, more preferably between 0.3 and 0.6 mm of the insulation area (in Direction of the tongue-and-groove means to the nearest trace) to indemnify, so that when joining two circuit boards no damage to the Leiterbahnen can occur through the spring of a corresponding spring-groove means of another circuit board.
    In a preferred embodiment, the circuit board has a substantially rectangular shape in plan view of the printed circuit board. It should be clear to those skilled in the art that spring-groove means can also be provided on other circuit board geometries, thereby avoiding a doubling of the creepage distance when connecting several printed circuit boards.
    Preferably be provided on at least two opposite sides of the circuit board corresponding spring-groove means. When using elongate printed circuit boards, for example, to form an elongated lighting means thereby several printed circuit boards can each be frontally engaged with each other with their respective corresponding spring-groove means.
    In a particularly preferred embodiment, the circuit board spring-groove means are provided on four sides. As a result, it is possible to connect printed circuit boards - in particular rectangular printed circuit boards - over a large area or in a matrix manner in order to form, for example, a large-area illumination means.
    Preferably locking means are provided on at least one of the tongue and groove means, which can be latched with a corresponding latching means of a corresponding spring-groove means of a further circuit board. Such a locking means can be provided, for example, by a pin or a bead, which is provided on the spring, and a kor¬responding recording on the spring of the other circuit board.
    This provides an easy way to provide a fixation of the circuit boards to each other in the horizontal direction.
    4. DESCRIPTION OF PREFERRED EMBODIMENTS
    In the following, a detailed description of the figures is given. 1 shows a schematic view of a printed circuit board known in the prior art for receiving light-emitting diodes; Figure 2 shows two consecutively arranged printed circuit boards according to Figure 1; Figure 3 is a schematic view of two printed circuit boards according to the invention, which forms a printed circuit board assembly according to the invention; and [0031] FIG. 4 shows a schematic view of a further embodiment of a circuit board arrangement according to the invention with alternative spring-groove means.
    In Figure 1, a known in the art circuit board 1 for receiving light emitting diodes is shown in a schematic view.
    The printed circuit board 1 has a substantially rectangular shape in plan view. In the illustrated embodiment, the printed circuit board 1 comprises a substrate 10 made of a suitable electrically insulating material, such as phenolic or epoxy resins, several on the substrate 10 arranged conductor tracks 20 which are formed of ei¬nem suitable electrically conductive material, such as copper, and finally a plurality of connection pads 30 to which different light-emitting diodes (or other electronic components) can be connected.
    The circuit board 1 shown here has in the forehead area, i. E. between the outer periphery and the adjacent trace 20, an insulation area 40 of approximately 3 mm providing an air and creepage distance to prevent unwanted discharge via the air or the carrier material.
    Figure 2 shows a schematic representation of two consecutively arranged printed circuit boards 1, 1 'of Figure 1. The same parts are verse¬hen with identical reference numerals.
    As can be seen particularly well in Figure 2, doubled in the frontal connection of the circuit boards 1, T formed by the respective creepage distances and creepage distances 40, 40 'combined air and creepage distance. This results in a com¬bined air and creepage distance of about 6 mm (about 3 mm + about 3 mm) in the connection area.
    After the carrier material 10, 10 'is usually formed from poorly heat-conductive resins, the heat can not be dissipated efficiently in the transition region of the printed circuit boards 1, 1', since the respective adjacent conductor tracks 20, 20 'are arranged relatively far apart from each other. As already explained above, the conductor tracks usually consist of a copper alloy which provides effective heat dissipation. Due to the doubling of the combined creepage distance and thus the corresponding insulation region, the desired regular arrangement of the light-emitting diodes is moreover made difficult or prevented.
    FIG. 3 shows a schematic view of two printed circuit boards 100, 100 'arranged one behind the other according to the invention.
    The printed circuit boards 100, 100 'shown in plan view have a substantially elongate rectangular shape. This form is used in particular to provide elongated lighting means.
    The printed circuit boards 100, 100 'likewise comprise a nonconductive carrier material 110, 110', printed conductors 120, 120 'and electrical contacts (for example connecting pads 130, 130' for light-emitting diodes (not shown)).
    According to the invention, the circuit boards 100, 100 'in their respective end face step-shaped spring-groove means, each in the form of a spring 150, 150' andein each for receiving a corresponding spring 150, 150 'formed groove 160, 160'.
    As can be clearly seen in Figure 3, the tongue and groove means are formed corresponding, that is. the spring 150 of the printed circuit board 100 shown on the right can be inserted into the groove 160 'of the left-hand printed circuit board 100' and the spring 150 'of the left-hand printed circuit board 100' can be inserted into the groove 160 of the printed circuit board 100 shown on the right.
    In the present case, a combination of at least two printed circuit boards according to the invention is to be understood as a printed circuit board arrangement according to the invention, wherein a printed circuit board arrangement provided with illuminants forms a lighting means according to the invention.
    In the exemplary embodiment shown, the respective springs 150, 150 'occupy approximately half the material thickness of the carrier material 110, 110', corresponding to which the respective groove 160, 160 'likewise increases approximately in half the thickness of the carrier material 110, 110 ' one.
    As can be seen in FIG. 3, when the two printed circuit boards 100, 100 'are connected, a combined air gap and creepage distance is formed, which essentially corresponds to the length of an air gap and creepage distance or the width of an insulation area 140, 140' of a printed circuit board 100, 100 'corresponds. It can also be seen that the respective tongue and groove means preferably do not extend directly to the respectively adjacent conductor tracks 120, 120 'or connection pads 130, 130' but are formed approximately 0.1 to 0.6 mm apart thereof in order to prevent damage to the conductor tracks 120, 120 'and the connection pads 130, 130' when the respective spring-groove means are pushed into one another. For this purpose, a protective region S, S 'extending from the closest printed conductor 120, 120' of the printed circuit board 100, 100 'to the adjacent tongue and groove means of the insulating region 140, 140' is preferably provided for this purpose.
    In the embodiment of the spring-groove means shown, these do not prevent the printed circuit boards 100, 100 'from being displaced vertically or horizontally relative to one another. This is particularly advantageous when large-area mosaic-like lighting surfaces are to be formed in this case PCBs inserted vertically as desired. can be exchanged.
    FIG. 4 shows a schematic representation of printed circuit boards 200, 200 'according to the invention, which likewise comprise a carrier material 210, 210' and conductor tracks 220, 220 'and connection pads 230, 230' arranged thereon.
    The printed circuit boards 200, 200 'shown here comprise alternatively formed tongue and groove means; Incidentally, the same applies to the first embodiment of the printed circuit boards 100, 100 'described above. As can be seen in FIG. 4, the printed circuit board 200 shown on the right has, in the end region, that is to say in the isolation region 240, a spring 250 arranged centrally with respect to the cross section and arranged in a centrally arranged groove 260 of the spring-groove means of the isolation region 240 'of the circuit board 200' shown on the left can be introduced.
    Compared to the spring-groove means shown in Figure 3 prevent the spring-groove means shown in Figure 4 in the connected state, a vertical displacement of the Lei¬terplatten 200, 200 'to each other. Such an embodiment of the spring-groove means may be advantageous, in particular, in the case of comparatively thicker printed circuit boards, in order to increase the rigidity or stability of the illumination surface formed by the printed circuit boards.
    Furthermore, it may be advantageous, the spring-groove means shown above with additional
    To provide locking means to si¬chern the circuit boards in the horizontal direction to each other. This can be, for example, by latching tongues which are provided on the springs and be¬reitgestellt correspondingly corresponding recordings on the other circuit board.
    The invention is not limited to the preceding embodiments, solan¬ge it is encompassed by the subject matter of the following claims. Furthermore, the preceding exemplary embodiments can be combined with one another in any desired manner. For example, the printed circuit board can have any desired shape, as long as it can be appropriately connected to one or more other printed circuit boards by means of corresponding tongue and groove means. Also, the configuration (shape, dimension, etc.) of the tongue and groove means is not limited by the invention as long as it allows joining of two or more printed circuit boards. As a rule, the respective tongue and groove means extend in the circuit board plane from the respective end face of the printed circuit board (away). It is also conceivable that different spring-groove means are provided on one end face in order to be connected to one or more corresponding printed circuit boards.
    权利要求:
    Claims (14)
    [1]
    Claims 1. A printed circuit board (100, 100 ', 200, 200') for receiving at least one light-emitting diode, comprising: at least on one side of the printed circuit board an insulating region (140, 140 ', 240, 240'), which creates an air gap and creepage distance between the on the printed circuit board (100, 100 ', 200, 200') arranged conductor tracks (120, 120 ', 220, 220') and the outer circumference of the printed circuit board (100, 100 ', 200, 200') provides, characterized in that at least one of the isolation regions (140, 140 ', 240, 240') has a tongue and groove means (150, 160, 150 ', 160', 250, 260) which is connected to a corresponding tongue and groove means (150 , 160, 150 ', 160'; 250, 260) of another printed circuit board (100, 100 ', 200, 200') can be brought into engagement in such a way that the respective insulation zones (140, 140 ', 240, 240') provide the creepage and clearance paths. at least partially overlap.
    [2]
    2. Circuit board (100, 100 ', 200, 200') according to claim 1, characterized in that the insulation area (140, 140 ', 240, 240') providing the creepage distance and the air gap on the printed circuit board (100, 100, 100 ', 200, 200') arranged conductor tracks (120, 120 ', 220, 220') and the outer circumference of the printed circuit board (100, 100 ', 200, 200') between 1 mm and 5 mm, preferably between 1.5 mm and 4 mm and more preferably between 2 mm and 3 mm.
    [3]
    3. Printed circuit board (100, 100 ', 200, 200') according to any one of claims 1 or 2, characterized gekenn¬zeichnet that the spring (150, 150 '; 250) and / or the groove (160, 160'; 260) of the tongue-and-groove means (150, 160, 150 ', 160', 250, 260) has a width from the end face of the printed circuit board which has the corresponding spring-groove means to the conductor track (120, 120 ', 220, 220') between 1 mm and 5 mm, preferably between 1.5 mm and 4 mm, and more preferably between 2 mm and 3 mm.
    [4]
    4. Printed circuit board (100, 100 ', 200, 200') according to any one of the preceding claims, characterized in that of the nearest conductor track (120, 120 '; 220, 220') of the Lei¬terplatte (100, 100 ', 200, 200 ') up to the adjacent spring-groove means the Isolationsbe¬reich (140, 140', 240, 240 ') has a protection region (S, S') to mechanical damage to the corresponding conductor track (120, 120 '; , 220 '), the protection region (S, S') having a width of preferably between 0.1 and 0.8 mm, especially preferably between 0.3 and 0.6 mm, of the width of the insulation region (140, 140 ', 240, 240').
    [5]
    Circuit board (100, 100 ', 200, 200') according to any one of the preceding claims, characterized in that the spring-groove means (150, 160, 150 ', 160') are step-shaped, with spring (150, 150 ' ) and groove (160, 160 ') each comprise half of the printed circuit board cross-section or printed circuit board thickness.
    [6]
    6. Circuit board (100, 100 ', 200, 200') according to any one of the preceding claims, characterized in that the tongue and groove means (250, 260) of two connected circuit boards (100, 100 ', 200, 200') with each other in such a way be engaged, that a vertical and / or horizontal displacement of the connected circuit boards (100, 100 ', 200, 200') is prevented.
    [7]
    7. Circuit board (100, 100 ', 200, 200') according to any one of the preceding claims, characterized in that the circuit board (100, 100 ', 200, 200') in plan view has a substantially rectangular shape.
    [8]
    8. Circuit board (100, 100 ', 200, 200') according to one of the preceding claims, characterized in that on at least two, preferably opposite sides of the printed circuit board (100, 100 ', 200, 200') tongue and groove means (150, 160, 150 ', 160'; 250, 260) are provided.
    [9]
    9. printed circuit board (100, 100 ', 200, 200') according to claim 8, characterized in that on all sides of the printed circuit board (100, 100 ', 200, 200') tongue and groove means (150, 160, 150 ', 160 ', 250, 260) are provided.
    [10]
    10. Circuit board (100, 100 ', 200, 200') according to any one of the preceding claims, characterized in that on at least one of the tongue and groove means (150, 160, 150 ', 160', 250, 260) latching means are provided which can be latched with a corresponding latching means of a corresponding spring-groove means (150, 160, 150 ', 160', 250, 260) of a further spring plate (100, 100 ', 200, 200').
    [11]
    11. Circuit board (100, 100 ', 200, 200') according to one of the preceding claims, characterized in that the printed circuit board (100, 100 ', 200, 200') is not a flexible printed circuit board.
    [12]
    12. Circuit board arrangement, in particular an illumination means, comprising at least two printed circuit boards (100, 100 ', 200, 200') according to one of claims 1 to 11, in which corresponding spring-groove means (150, 160, 150 ', 160' , 250, 260) engage each other so that the respective isolation areas (140, 140 ', 240, 240') providing the air and creepage distances at least partially overlap.
    [13]
    13. Circuit board arrangement according to claim 12, wherein the air and creepage distances formed by the at least two printed circuit boards (100, 100 ', 200, 200') of the overlapping isolating regions (140, 140 ', 240, 240') between the printed conductors (120, 120 ', 220, 220') of at least two printed circuit boards (100, 100 ', 200, 200') 1 mm and 5 mm, preferably between 1.5 mm and 4 mm and particularly preferably between 2 mm and 3 mm is.
    [14]
    14. Lighting means, comprising a printed circuit board assembly according to any one of claims 12 or 13, wherein the circuit boards each comprise at least one light-emitting means, preferably a light-emitting diode. 4 sheets of drawings
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    法律状态:
    2017-11-15| MM01| Lapse because of not paying annual fees|Effective date: 20170331 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE202014100686.9U|DE202014100686U1|2014-02-17|2014-02-17|Printed circuit board with special coupling areas|
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