• 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:
    A method for positioning at least one electronic component (3) on a printed circuit board (1) for installation in a vehicle headlight, wherein the positioning of the at least one electronic component (3) relative to at least one position mark on the printed circuit board (1), wherein at least one position mark is optically detected, is characterized in that as for the interaction with mechanical positioning means (9, 15) for the circuit board (1) provided on the vehicle headlight edge portion (6, 7, 8, 8 ', 8 '') of the circuit board is used.
    公开号:AT517120A1
    申请号:T50357/2015
    申请日:2015-05-04
    公开日:2016-11-15
    发明作者:Kieslinger Dietmar；Wurm Peter；Arianit Idrizaj
    申请人:Zkw Group Gmbh；
    IPC主号:
    专利说明:

    Method for positioning at least one electronic component on a printed circuit board
    The invention relates to a method for positioning at least one electronic component on a printed circuit board for installation in a vehicle headlight, in which the positioning of the at least one electronic component relative to at least one position mark on the circuit board, wherein the at least one position mark is optically detected, and a Printed circuit board produced by such a method.
    Vehicle headlamps increasingly include the electronic and in particular semiconductor devices, in particular the LED technology, in which light-emitting diodes (LED) are used as the light source for the headlamp, is widely used. LEDs have a high light yield and are characterized by a small footprint compared to conventional light sources such as halogen lamps. The LEDs are usually on printed circuit boards or boards, which also have corresponding conductor tracks for powering the LEDs, set and are determined by known in printed circuit board assembly process on the circuit boards.
    When LEDs are used as light sources for vehicle headlights, extremely small tolerances with regard to the positioning of the LEDs with regard to the LEDs to ordered optical components such as reflectors and / or lenses must be observed, since the legislator prescribes precise specifications with regard to the achieved light image for the extremely bright LEDs To avoid dazzling oncoming traffic when operating the vehicle headlight. In the prior art, therefore, due to the manufacturing inaccuracies that regularly occur in the conventional printed circuit board construction, it is necessary to set components such as reflectors and / or lenses according to the actual position of the LEDs or the light sources on the circuit board. The tolerances that occur when populating LEDs and similar light sources such as laser diodes, therefore, lead to the need for the headlamp manufacturer to empirically determine the required relative position of reflectors and / or lenses and to define the optical elements of that particular position. While the production of printed circuit boards is a largely automated process and can therefore be done quickly and in large quantities and thus at a very low cost, the adjustment of a headlight in terms of the relative position of light sources and optical elements such as reflectors and / or lenses means a lot of work, the precludes the requirement for efficient and cost-effective headlight production.
    A significant cause of the relative inaccuracy of the positioning of light sources on a printed circuit board or board for use in a vehicle headlamp is based primarily on the fact that even with extremely accurate production of the board in terms of conductor tracks and the position of the light sources, the preparation of mounting options for the circuit board on the vehicle headlight, usually edge portions of the circuit board such as edges, notches and / or holes can not be performed with the same precision as the preparation of circuit traces and contact pads for light sources such as LEDs or laser diodes. In conventional Referencing for light sources and mounting options, which are based on position marks that are similar to the conductor tracks applied to a printed circuit board or etched or printed on a circuit board, planting errors in setting the mounting options on the one hand and in the assembly of the light sources on the other. Such Referenziermöglichkeiten therefore can not lead to the desired precise results, as due to the said inaccuracy of the position of the mounting structures of the circuit board intrinsic inaccuracy when fixing on the vehicle headlight results, which in turn causes optical elements such as reflectors and / or lenses subsequently to achieve desired light image must be set.
    The invention therefore aims to eliminate the described shortcomings and to improve a method of the type mentioned in that a subsequent positioning or setting up of optical elements such as reflectors and / or lenses after loading and setting a circuit board in a vehicle headlights omitted so that a fully automated production of vehicle headlights possible.
    To solve this problem, a method according to the aforementioned type according to the invention further developed such that is used as the at least one position mark a for cooperation with mechanical positioning means for the circuit board provided on the vehicle headlight edge portion of the circuit board. As already mentioned, serve in particular edge portions of the circuit board of the mechanical Po sitioning or fixing the circuit board on the vehicle headlight, such mechanical positioning of pins, stops and the like may be formed, which are provided on corresponding components of a vehicle headlamp, with correspondingly shaped edge portions of Circuit board to define an orientation and position of the circuit board on or in the vehicle headlight cooperate. According to the invention, if such an edge portion of the printed circuit board intended for interaction with mechanical positioning means is used as a position mark which is detected in order to bring about the positioning of an electronic component relative to this position mark, a substantial source of inaccuracies is eliminated in the production of the vehicle headlight in that the at least one electronic component, for example an LED (light-emitting diode), is referenced to an edge section which in the installation situation of the printed circuit board carrying this electronic component, the actual position in the vehicle headlight and thus relative to other optical elements such as reflectors and / or lenses that interact with the electronic component for the resulting light image of the vehicle headlamp. Overall, a possible source of error with regard to the positioning of electronic components is eliminated by the application of the method according to the invention, so that overall a higher precision is achieved, and in particular the expense for the subsequent alignment of optical components can be avoided.
    For consistent implementation of an automated production of the printed circuit board according to the invention, the inventive method may preferably be characterized in that the at least one edge portion of a first side of the circuit board is optically detected in particular with a camera and based on position data of the at least one edge portion, a data set with a loading position for the at least one component is created and made available to an electronic component placement machine. Such camera-based methods of detecting visible structures are well known in the art and can be readily applied to edge portions such as holes, slots, edges, rims, and notches of a printed circuit board, with today's conventional digital image capture offering the ability to fully automated datasets with a placement position for the at least one component to create.
    In order to improve the optical detection of the edge portion of the printed circuit board and in particular the optical detection with a camera, the inventive method is preferably further developed such that the circuit board is illuminated by a second, the first side opposite side. The illumination of the printed circuit board from the second side, which is opposite to the first side from which the printed circuit board can be optically detected with a camera, leads to a significant increase in the contrast at edge regions of the printed circuit board, so that edge sections and thus edge sections suitable for the interaction with mechanical positioning means for the printed circuit board are provided on the vehicle headlight, can be significantly better recognized.
    As a rule, printed circuit boards for the production of edges and edges and thus also for the production of edge portions for the interaction with mechanical positioning means by cutting, presenting, punching and / or drilling produced, whereby such edge sections closely considered, by no means nearly ideal smooth edges and even surfaces but on the contrary often have large irregularities. However, since it is precisely this irregular course of the edge section that is relevant for the actual position of the printed circuit board in the vehicle headlight, it must be optically detected as precisely as possible in order to achieve the highest possible precision in the positioning of the electronic components in accordance with the method according to the invention. The method according to the invention is therefore preferably developed in such a way that illumination takes place with light directed in parallel. The illumination with collimated light from the second side and the detection of the collimated light at the edge portion, in particular by a camera, due to the absence of divergent light components, forms the actually effective edge of the edge portion with the greatest possible precision, so that an extremely accurate referencing of the electronic component with respect to the actually effective in positioning edge portion can be done. In addition, the inventive method is independent of any unevenness of the surface of the first side of the circuit board, while in the position determination by microscopic methods due to leaking layers of metal and paint in the edge region of the board, the relevant focusing plane can not always be determined beyond doubt. For a further improved positioning of the at least one electronic component on the printed circuit board, the procedure is preferably such that a plurality of posi tion marks of a printed circuit board is detected. It will be appreciated by those skilled in the art that the degree of determination of the positioning of the at least one electronic component increases with the number of detected position markers, although it may well be conceivable to detect only one position marker and position an electronic component on one Circuit board.
    The inventive method is preferably carried out in such a way that a plurality of printed circuit boards are produced on a common benefit and the detection of the at least one position mark takes place when the circuit boards are not separated, which is the implementation of the method according to the invention in the field of printed circuit board technology Production methods. Namely, it is common in the printed circuit board art, a plurality of printed circuit boards or boards, i. of functional units, which are addressed at the end of the production process as a printed circuit board or board, to produce on a common plate. Such a plate, in which a plurality of functional units are connected to each other and are divided by later processing steps such as cutting, milling or punching, is referred to as useful by those skilled in the art, with a benefit after making the various conductor tracks and positioning or Applying the electronic components, according to the invention is cut or divided under detection of provided for the interaction with mechanical positioning means edge portions to the functional units, ie to get the boards or boards. The inventive method makes it possible to make an accurate positioning of the electronic components already when the circuit boards are combined for a common benefit, so that the inventive loading and positioning of the electronic components can be done in machines that are for the Be and processing of large-scale Benefits are aligned, and commonly used in the PCB manufacturing process.
    Preferably, the procedure is such that in each case at least one position mark for each printed circuit board is detected on the common benefit, so that the actual relevant when installed in the vehicle headlight for positioning the circuit board in the vehicle headlight position mark or the relevant edge portion of the circuit board for the exact Positioning of the at least one electronic component is used.
    As already described above in connection with the procedure according to the invention for a single printed circuit board, it is also possible to work on a common use in the processing of printed circuit boards in such a way that a plurality of position marks for a component to be positioned are recorded for each printed circuit board on the common use and is used to create a record with a placement position for the component, as corresponds to a preferred embodiment of the present invention.
    As also explained above several times, the inventive method is particularly useful for the production of vehicle headlights applied, so that the inventive method is preferably developed to the effect that the electronic component is selected from the group consisting of an SMD component, an LED, a laser diode and a photodiode. An SMD component is also known to the person skilled in the art as SMD (SMD = Surface Mounted Device).
    Since in a production line for printed circuit boards usually the processing tools are arranged on only one side of the circuit board, which runs through the production line, also in the method according to the invention, the optical detection is carried out from that side on which with said tools conductor tracks and electronic components be applied to the circuit board. In other words, this means that the method according to the invention is developed to the effect that the first side of the printed circuit board is that side of the printed circuit board on which the at least one electronic component is positioned.
    The invention will be explained in more detail with reference to an embodiment schematically illustrated in the drawing. In this show
    1 is a schematic plan view of a printed circuit board with a plurality of electronic components and a plurality of conceivable edge portions, which can be used as position marks for carrying out the method according to the invention,
    Fig. 2 is a schematic representation of a section of a production line for carrying out the method according to the invention, as well as
    Fig. 3 is a flow chart of the method according to the invention.
    In Fig. 1, reference numeral 1 denotes a printed circuit board. The circuit board 1 has a plurality of interconnects 2 and a plurality of electronic components 3, wherein the interconnects 2, the electronic components 3 connect to a connector area 4, which in turn is connected to an electrical system, not shown, of a vehicle. The circuit board 1 may now have a plurality of position marks, wherein the position marks are inventively formed by an edge portion of the circuit board, which is provided for cooperation with mechanical positioning means for the circuit board on the vehicle headlight. Thus, the hole 5, the slot 6, the notch 7 and the indentations 8, 8 ', 8 "can form edge sections of the printed circuit board To illustrate the invention, a plurality of such edge sections are shown in the example according to Figure 1. However, it is obvious in that fewer or more such edge sections as well as differently shaped edge sections can be used as position markers for the realization of the method according to the invention, as long as they cooperate with corresponding mechanical positioning means for the printed circuit board on the vehicle headlight only in the determination of the printed circuit board 1. In FIG 15 and a stop 9 are shown in section, wherein the pin 15 and the stop 9 may be formed, for example, in one piece with a heat sink 10, not shown, of a vehicle headlight Alternatively, it would also be conceivable that a screw, not shown, for example, with the hole 5 or the slot 6 cooperates, for which a corresponding threaded opening 11 is provided in the heat sink 10. According to the invention, the edge sections of the hole 5, the elongated hole 6, the notch 7 and / or the recesses 8, 8 ', 8 "are detected and the positions of the individual components are defined with respect to these edge sections.
    2, a camera 12 is provided for optical detection, for example, the edge portion of the hole 5 and the elongated hole 6, wherein the printed circuit board 1 from the second side, which is opposite to the first side is illuminated to increase the contrast at the edge portions. The light passes through the recesses forming the edge portions, so that the camera gets optimum contrast values between the passing light and the light shielded by the circuit board for detecting the edge portions of the circuit board.
    In detail A of FIG. 2 is shown on the one hand, that the edges or the edge portions of the circuit board by no means run perfectly but may have inaccuracies, roughness and fraying, so that, parallel light, which is symbolized by the bevy of arrows 13, especially can be advantageously used to reliably detect the actually reaching the edge of the edge portion of the circuit board. The collimated light is obtained in a production line through the use of a collimator 14.
    In Fig. 3, the process flow is shown again. For positioning of the electronic components or the LEDs or laser diodes is an optical detection of
    Position markers of the circuit board, these position marks are according to the invention edge portions of the circuit board, which is created for the interaction with mechanical positioning means for at least one edge portion, a record with a placement position for the component and the record is passed to a placement machine or this made available , A placement machine may include a plurality of placement stations. At the end of the procedure, an exit inspection takes place in the form of automatic optical inspection (AOI).
    权利要求:
    Claims (11)
    [1]
    claims
    Anspruch [en] A method for positioning at least one electronic component (3) on a printed circuit board (1) for installation in a vehicle headlight, in which the positioning of the at least one electronic component (3) takes place relative to at least one position mark on the printed circuit board (1) the at least one position mark is optically detected, characterized in that as the at least one position mark a for the interaction with mechanical positioning means (9, 15) for the circuit board (1) provided on the vehicle headlight edge portion (6, 7, 8, 8 ', 8 ") of the circuit board is used.
    [2]
    2. The method according to claim 1, characterized in that the at least one edge portion (6, 7, 8, 8 ', 8 ") of a first side of the printed circuit board (1) in particular with a camera (12) is optically detected and based on Position data of the at least one edge portion (6, 7, 8, 8 ', 8 ") creates a data set with a placement position for the at least one component (3) and a pick and place machine for electronic components (3) is provided.
    [3]
    3. The method according to claim 1 or 2, characterized in that the printed circuit board (1 =) is illuminated by a second, the first side opposite side.
    [4]
    4. The method according to claim 3, characterized in that the illumination with collimated light (13) takes place.
    [5]
    5. The method according to any one of claims 1 to 4, characterized in that a plurality of position marks of a printed circuit board (1) is detected.
    [6]
    6. The method according to any one of claims 1 to 5, characterized in that a plurality of circuit boards (1) are produced on a common benefit and the detection of the at least one position mark takes place when the circuit boards (1) are not yet separated.
    [7]
    7. The method according to claim 6, characterized in that in each case at least one position mark for each printed circuit board (1) is detected on the common benefit.
    [8]
    8. The method according to claim 6, characterized in that a plurality of position marks for a component to be positioned (3) for each printed circuit board detected on the common benefit and used to create a data set with a placement position for the component (3).
    [9]
    9. The method according to claim 1, wherein the electronic component is selected from the group consisting of an SMD component, an LED, a laser diode and a photodiode.
    [10]
    10. The method according to any one of claims 1 to 9, characterized in that the first side of the printed circuit board (1) is that side of the printed circuit board on which the at least one electronic component (3) is positioned.
    [11]
    11. Printed circuit board produced by the method according to one of claims 1 to 10.
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50357/2015A|AT517120B1|2015-05-04|2015-05-04|METHOD FOR POSITIONING AT LEAST ONE ELECTRONIC COMPONENT ON A CIRCUIT BOARD|ATA50357/2015A| AT517120B1|2015-05-04|2015-05-04|METHOD FOR POSITIONING AT LEAST ONE ELECTRONIC COMPONENT ON A CIRCUIT BOARD|
    CN201680025963.4A| CN108541400B|2015-05-04|2016-04-22|Method for positioning at least one electronic component on a circuit board|
    JP2017557313A| JP2018520501A|2015-05-04|2016-04-22|Method for positioning at least one electronic component on a circuit board|
    PCT/AT2016/050109| WO2016176702A1|2015-05-04|2016-04-22|Method for positioning at least one electronic component on a circuit board|
    EP16720997.2A| EP3292742A1|2015-05-04|2016-04-22|Method for positioning at least one electronic component on a circuit board|
    US15/568,843| US10531571B2|2015-05-04|2016-04-22|Method for positioning at least one electronic component on a circuit board|
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