EP3671013A1 - Motor vehicle headlamp and method for aligning at least one light source of a motor vehicle headlamp - Google Patents

Abstract

The invention relates to a motor vehicle headlight (1) with at least one light source (10) arranged on a circuit board (30) and with at least one optical system (20), the at least one light source (10) having a light-emitting surface (11) and being set up for this purpose is to emit generated light from the light-emitting surface (11) in the direction (S ₁) of the optical system (20). The circuit board (30) comprises a base circuit board (31), at least one sub-circuit board (33) equipped with the at least one light source (10) and at least one flexible circuit board section (32) which connects the base circuit board (31) with the Sub-circuit board (33) movably connects, the sub-circuit board (33) can be connected at least in sections to at least one carrier body (40) and the carrier body (40) is set up in a position connected to the sub-circuit board (33) to fix the sub-circuit board (33) in a position pivoted at an angle of inclination (a) relative to the base circuit board (31), the generated light being emitted by the at least one light source (10) at this angle of inclination (a). A method for aligning at least one light source (10) of a motor vehicle headlight (1) in the direction of an optical system (20) is also specified.

Description

The invention relates to a motor vehicle headlight with at least one light source which is arranged on a printed circuit board, and with at least one optical system, the at least one light source having a light-emitting surface and being designed to emit generated light from the light-emitting surface in the direction of the optical system , as well as the optical system is set up to emit light in a desired direction as on a road. A method for aligning at least one light source of a motor vehicle headlight in the direction of an optical system is also specified.

The use of motor vehicle headlights in which one or more light sources are designed, for example, as LEDs, the light sources being attached to or on printed circuit boards, has long been known. The circuit boards not only fulfill the function of a direct support for such light sources, but also serve to supply power and electronically control the light sources arranged thereon. In order to be able to install such light sources such as LEDs in headlights such as headlights or rear lights of a motor vehicle, circuit boards are used nowadays which are already glued to a carrier plate, for example made of aluminum, before these so-called “circuit boards on aluminum” subsequently with one or more LEDs be equipped. By gluing the circuit board to a flat contact surface of a heat transfer body, for example made of aluminum or copper, the heat dissipation of the light sources during operation of the motor vehicle headlights is correspondingly improved. Through the use of reinforced printed circuit boards that are already glued flat to a flat or planar support plate and which are then fitted with the LEDs, the stability of such "printed circuit boards on aluminum" as supports or underlays for the light sources fitted thereon is significantly increased and undesirable vibrations of the light sources during operation of the vehicle is reduced accordingly.

Furthermore, flexible circuit boards are already used for motor vehicle headlights, which are glued to such an aluminum support plate and which are subsequently fitted with LEDs. Such flexible printed circuit boards offer the advantage that two or more rigid printed circuit board areas, each of which is glued to a carrier board and equipped with LEDs, can be pivoted in their position relative to one another by means of flexible printed circuit board areas lying between them. This makes it easier to meet new requirements in terms of the shape and design of contemporary motor vehicle headlights, since they are more flexible by using them Printed circuit boards the space required for their installation inside a headlight housing can be reduced. However, here too, those light sources which are jointly fastened to the same rigid circuit board section can only be aligned together in a coplanar manner, so that these light sources usually radiate perpendicularly from the plane of the rigid circuit board section.

However, a disadvantage of such motor vehicle headlights known from the prior art is at least that when using, for example, LED modules which consist of a plurality of light sources, these multiple light sources must be perfectly matched to one another with regard to their installation position, in order, inter alia, to prevent the formation of undesired ones To prevent stray light. Such stray light formation - depending on the respective legal regulation - can lead to problems with the homologation of motor vehicle headlights due to the standards and limit values to be observed. However, an individual setting and specific coordination of the individual light sources with regard to their inclination and positioning in relation to one another or in relation to a circuit board level is neither intended nor would it be due to the “circuit boards on aluminum” that are currently used and have previously been glued to carrier boards the space required and high costs for use in the motor vehicle sector possible.

One of the objects of the present invention is to overcome the disadvantages known from the prior art in a motor vehicle headlight of the type described. In addition, a generic motor vehicle headlight is to be specified in which the design freedom for the design of modern motor vehicle headlights, which are usually equipped with a large number of individual light sources, each arranged on or on printed circuit boards, is further increased. Another object of the invention is to provide a generic motor vehicle headlight in which the complexity of the assembly and adjustment of optical components that are not to be coplanar is significantly reduced in comparison to currently known headlights.

Within the scope of the present invention, a particularly flexible assembly and alignment method is also to be specified, which allows individual light sources arranged on or on printed circuit boards to be mounted in a vehicle headlight housing in an individually coordinated position relative to one another in the most cost-effective manner possible.

These objects are achieved with a motor vehicle headlight of the type mentioned at the outset, in which the printed circuit board has a basic printed circuit board, at least one sub-printed circuit board equipped with the at least one light source and at least one flexible printed circuit board section, which flexible printed circuit board section comprises the basic printed circuit board movably connected to the sub-printed circuit board, the sub-printed circuit board being connectable to at least sections of at least one support body and the at least one support body being set up in a position connected to the sub-printed circuit board, the at least one sub-printed circuit board at an angle of inclination to fix relative to the base circuit board pivoted position, the generated light is emitted at this angle of inclination from the at least one light source.

In the context of the invention, the term optical system is understood to mean the lenses, mirrors, prisms, light guides, optical lenses, diaphragms and / or reflectors which produce an optical image, together with the brackets and fastening devices required for their assembly. For example, a motor vehicle headlamp according to the invention can comprise a first optical system which has one or more optical lenses, each of which can be of the same or a different design. Likewise, a motor vehicle headlight according to the invention can, for example, comprise a second, third and / or further optical system which differs from the aforementioned first optical system and which, for example, has one or more reflectors and / or light guides of the same or different construction. Depending on the design variant and application for which the motor vehicle headlight is intended, a common optical system or several identical optical systems or else several different optical systems can be provided in a motor vehicle headlight according to the invention.

The at least one light source of the motor vehicle headlight has a light-emitting surface in a manner known per se and is set up to emit the generated light from the light-emitting surface in the direction of the at least one optical system, the at least one optical system which, for example, has one or more optical systems Lenses and / or reflectors can be set up to emit light in the operation of the motor vehicle headlight in a specific, desired direction as on a road.

For the preferred application, according to which LED light sources are used as light sources, the at least one sub-circuit board being equipped with one or more LEDs, the light emission direction of such an LED light source is to be understood in the context of the present application document, its main light beam direction. As is known to the person skilled in the art, LEDs are diffuse Lambertian emitters, the emission characteristics of which can vary depending on the application and the type of the LEDs. In addition to narrow and wide lobes (right down to the Lambert spotlight), LED light sources can also have more or less deformed radiation characteristics. For example, so-called Batwing LEDs, two of which are mentioned as examples Have light intensity maxima and whose light intensity distribution is rather heart-shaped, as well as so-called side-emitter LEDs with a light intensity maximum that is approximately normal to the beam axis. In order to take into account the possible different emission characteristics of LED light sources, their main light beam direction is used here as a reference variable for the light beam direction.

The individual angle of inclination of the sub-circuit board pivoted relative to the base circuit board is chosen such that the main light beam direction of the generated light is oriented at exactly this angle of inclination in the desired direction towards the at least one optical system.

In this motor vehicle headlight according to the invention, a printed circuit board is advantageously used which has a basic printed circuit board, at least one sub-printed circuit board equipped with the at least one light source and at least one flexible printed circuit board section, the flexible printed circuit board section movably connecting the basic printed circuit board to the sub-printed circuit board . The flexible circuit board section expediently has fewer layers or layers in comparison to the base circuit board and / or the at least one sub-circuit board.

Such flexible printed circuit boards are used in many areas of electronics today. The circuit board is usually bent, twisted or folded into a housing. The use of flexible printed circuit boards primarily replaces cables and connectors or creates connections and geometries that cannot be achieved with a rigid printed circuit board.
Furthermore, semi-flexible circuit boards are known which differ from the flexible circuit boards in the materials used, limited bending radii and bending cycles. Instead of a polyimide material, a standard thin laminate FR4 material is usually used to offer an inexpensive alternative for certain applications. The term "FR4" is familiar to the person skilled in the art and denotes a class of flame-retardant and flame-retardant composite materials consisting of epoxy resin and glass fiber fabric. Such semi-flexible circuit boards have a more stable structure than flexible circuit boards, which makes handling during assembly easier.

So-called "rigid-flex" printed circuit boards are also known, in which fixed, rigid areas of the printed circuit board and flexible "flex" areas are connected to one another with a reduced number of layers compared to the rigid areas. For example, material combinations of polyimide and FR4 laminate or combinations of FR4 and thin laminate are used to manufacture such rigid-flex circuit boards. By using Rigid-Flex circuit boards, the rigid circuit boards without the use of cables or Connecting connections together, an improved signal transmission between the circuit boards can be achieved.

Within the scope of the invention, it can also be advantageous for reasons of cost if a multi-layer standard printed circuit board is provided for equipping with one or more light sources, in which one or more sub-printed circuit board areas on the standard printed circuit board are partially free - comparable to panel separation joints a manufacturing benefit for the separation of printed circuit boards. In general, a benefit layout is selected depending on the circuit board design or on the contour and structure of the circuit boards, on the specified accuracy for the separation, the permissible mechanical stress during separation, the cycle time, as well as the quality specifications and costs.

For this purpose, the clearances between a sub-circuit board area and the base circuit board are expediently arranged when processing a multi-layer standard circuit board in such a way that the sub-circuit board area has a rectangular or square layout, for example, which is equipped with one or more light sources. In the case of an internal sub-printed circuit board, the exemptions are preferably arranged on three of the four of their side edges opposite the basic printed circuit board surrounding the sub-printed circuit board. So that a flexible circuit board section is formed as a movable connection between the base circuit board and the sub-circuit board, some of the circuit board layers are expediently removed in this area by means of a deep milling cutter. The flexible circuit board section therefore has fewer layers or layers in comparison to the base circuit board and / or the at least one sub-circuit board.

At least one securing web, which is arranged in the area of the clearance between the base circuit board and the at least one sub-circuit board, which is equipped with at least one light source, and which still connects these two circuit board areas to one another during assembly, is particularly advantageously used for securing and stabilization the at least one sub-circuit board to be assembled in a starting position in the plane of the circuit board. The at least one securing web is expediently cut through only after the printed circuit board has been fitted with the corresponding optical components, for example the light sources, and before the basic printed circuit board has been installed. The one or more securing bars ensure the necessary stability of the sub-circuit board sections during the circuit board production or during the assembly with optical and / or electronic parts and components. For example, it can be equipped with optical components such as light sources using SMT technology (Surface-Mounting Technology). As soon as the at least one securing web between the base circuit board and the at least one is cut through a sub-circuit board, the correspondingly exempted sub-circuit board is movably connected to the base circuit board by means of the flexible circuit board section.

In this way, multilayer standard printed circuit boards can be used at particularly low cost, the production of which is significantly cheaper than foil conductors or so-called flexprints with several individual prints or else as the flat-bonded "printed circuit boards on aluminum" mentioned at the beginning.

In contrast to headlights with the “printed circuit boards on aluminum” mentioned at the outset, that is to say flexible printed circuit boards which are already glued flatly to a support plate made of aluminum or copper and which are only subsequently fitted with LEDs, a motor vehicle headlight according to the invention offers the essential advantage of that here only one or more sub-printed circuit boards equipped with light sources are connected to at least one support body and the at least one support body is designed to, in a position connected to the sub-printed circuit board, the at least one sub-printed circuit board in a position at an angle of inclination relative to the base Fix circuit board pivoted position, wherein the main light beam direction of the generated light at this angle of inclination - based on the plane of the base circuit board - is emitted by the at least one light source.

Thus, advantageously only that circuit board section of a sub-circuit board equipped with light sources is fixed by means of one or more carrier bodies in a defined, pivoted position relative to the base circuit board in order to align the light beams emitted by the at least one light source as precisely as possible according to a light function in this fixed position and to be able to adjust. This type of individual storage and fixation of only those sub-circuit boards that are actually equipped with light sources offers much greater flexibility with regard to the individual adjustability and alignment of the corresponding light sources. Furthermore, this offers a possibility of increasing the freedom of design due to the reduced printed circuit board dimensions without continuous aluminum carrier plates and of reducing the dimensions of the housing of a motor vehicle headlight according to the invention by means of a particularly compact construction.

The at least one carrier body can advantageously be made in one piece or in one piece and can have corresponding support surfaces, projections, fastening devices and / or holding devices in order to fix one or more sub-printed circuit boards in positions pivoted relative to the base printed circuit board.

It can also be expedient in the frame if the carrier body is of multi-part design and if, for example, each part of the multi-part carrier body can be connected to a sub-circuit board or is used to support and fix a sub-circuit board. Furthermore, it is conceivable within the scope of the invention that a plurality of mutually independent carrier bodies are provided, each of which can be connected to one or more sub-circuit boards and are used to fix them in a position pivoted at an individual angle of inclination with respect to the base circuit board. For example, the carrier bodies can be shaped like ramps or wedges at least in sections and can be arranged on the back of the front sides of the sub-printed circuit boards equipped with the light sources.

In a preferred embodiment of the invention, in the case of a motor vehicle headlight, the at least one light source can be moved from a first position, in which the sub-printed circuit board equipped with the at least one light source and the at least one carrier body are separated from one another in an unconnected position, in particular by tilting , Pivoting and / or rotating into a second position, in which the sub-printed circuit board equipped with the light source and the at least one carrier body are fixed to one another in a connected position, can be transferred. The one or more sub-printed circuit boards equipped with light sources can expediently be tilted, pivoted, rotated, for example, from an initial position in the plane of the base printed circuit board into the respective fixed installation positions in which the sub-printed circuit boards are fastened to one or more carrier bodies and / or be moved. Individual sub-printed circuit boards equipped with light sources can thus advantageously be adapted particularly flexibly in their individual installation positions to the required lighting tasks of the motor vehicle headlight.

It can be particularly expedient if, in the case of a motor vehicle headlight according to the invention, in the fixed position of the sub-circuit board equipped with the at least one light source, in which the sub-circuit board is connected to the at least one carrier body and is pivoted at an angle of inclination relative to the base circuit board, the main light beam direction emitted by the at least one light source is oriented in the direction of the at least one optical system.

The light-emitting surfaces of the light sources thus do not necessarily have to have the same main emission direction, for example essentially normal to the front of the base circuit board, as is the case with conventional circuit boards or also with the aforementioned “circuit boards on aluminum”. Due to the flexible assembly and the individual, coordinated positioning of the sub-circuit boards relative to each other in a vehicle headlight housing, the emitted light can be aligned particularly efficiently to one or more optical systems such as optical lenses or reflectors, which advantageously increases the light yield.

In another advantageous embodiment, in a motor vehicle headlight according to the invention, a sub-circuit board equipped with a plurality of light sources, which is connected to the at least one carrier body in a fixed position pivoted at an angle of inclination relative to the base circuit board, is connected to the at least one carrier body emitted light beams or their main light beam directions are aligned together in the direction of the at least one optical system.

In a further development of the invention, in a motor vehicle headlight according to the invention, in which the printed circuit board has a plurality of sub-printed circuit boards each equipped with at least one light source, which are movably connected to the base printed circuit board with flexible printed circuit board sections, the plurality of sub-printed circuit boards equipped with light sources each be connected to the at least one carrier body in fixed positions pivoted at individual angles of inclination relative to the base circuit board.

The plurality of assembled sub-printed circuit boards can, for example, be arranged so as to be free within the basic printed circuit board by means of corresponding millings. It is also provided in the context of the invention that sub-printed circuit boards outside the basic printed circuit board are movably connected to the basic printed circuit board with corresponding flexible printed circuit board sections. For this purpose, the sub-printed circuit boards can for example be attached to one another in series with one another, parallel to one another and / or in a matrix arrangement to one another or in relation to the base printed circuit board.

In a further advantageous embodiment of the invention, in a motor vehicle headlight, the circuit board can have a plurality of sub-circuit boards each equipped with at least one light source, which are arranged in a matrix-like manner with respect to one another, the plurality of sub-circuit boards equipped with light sources in each case at individual angles of inclination relative to the base circuit board pivoted, fixed layers are connected to the at least one support body.

Such a matrix-shaped arrangement offers the advantage, in particular when matrix LED modules are used, which consist of a plurality of light sources arranged in rows and / or in columns, that these light sources are inclined with respect to their inclination due to the flexible mounting of the light sources on sub-printed circuit boards and position can be coordinated as best as possible. Likewise, it is provided within the scope of the invention that a plurality of light sources can also be arranged on the individual sub-printed circuit boards, the inclination and / or position of which can be adjusted relative to the basic printed circuit board. For example, in a matrix arrangement, individual columns or rows of LED light sources can each be arranged on a sub-circuit board. In a motor vehicle headlight according to the invention, the light beams emitted by the light sources arranged on the plurality of sub-printed circuit boards or their main light beam directions are expediently oriented in the direction of the at least one optical system.

In a development of the invention, a motor vehicle headlight can comprise at least two optical systems, at least one first sub-circuit board equipped with light sources being connected to the at least one carrier body in a fixed position pivoted at a first angle of inclination relative to the main circuit board and which of the at least one light source emitted main light beam direction is aligned in the direction of a first optical system, and at least one second sub-circuit board equipped with light sources is connected to the at least one carrier body in a fixed position pivoted at a second inclination angle relative to the base circuit board and which at least one light source emitted main light beam direction is aligned in the direction of a second optical system.

A wide variety of design variants are conceivable for this purpose: for example, independent support bodies can be used for each optical system, each of which can be individually adjusted and with the help of which the sub-printed circuit boards in their position attached to the respective support body to the respective assigned optical System can be aligned. In this way, for example, different optical systems, which are provided for different lighting functions such as low beam, parking light, flashing light, cornering light or high beam, can be supplied with individually adjusted, optimally aligned light beams that are emitted by the respectively assigned light sources.

Likewise, a carrier body can be used within the scope of the invention, which is designed, for example, in several parts and in which a first carrier body part or section for fastening sub-circuit boards, the light sources of which are aligned with the first optical system, and a second carrier body part or section Attachment of sub-circuit boards, the light sources of which are aligned with the second optical system, is provided.

It can be particularly advantageous if, in a motor vehicle headlight according to the invention, the at least one support body has at least one support surface to which at least one sub-circuit board equipped with the light source is fastened in its position connected to the support body.

In this embodiment variant, the support body with corresponding support surfaces has the advantage that the assembled sub-printed circuit boards can be attached to these support surfaces over a large area. As a result, a largely vibration-free bracket with the Sub-circuit boards equipped with light sources are guaranteed and this embodiment variant is also particularly robust and stable, since the sub-circuit boards are particularly well protected from mechanical loads by the contact surfaces of the at least one carrier body, which are attached to their rear sides facing away from the light sources. For this purpose, the contact surfaces are expediently planar and, in a preferred embodiment, at least so large that the entire contact surface of the respective sub-printed circuit boards rests in the attached position.

In a further advantageous embodiment of the invention, the at least one support body can be designed as a heat sink in a motor vehicle headlamp and the at least one sub-circuit board equipped with the light source can be attached to the at least one support surface of the support body in a heat-conducting manner, preferably with a heat-conducting adhesive layer.

In this embodiment, the respective carrier body advantageously acts as a heat sink and is expediently made from a heat-conducting metal, preferably from aluminum and / or copper or corresponding alloys. Thermally conductive adhesives are widely used for the heat dissipation of power electronics. In this way, the heat-conducting adhesives reduce the heat load when gluing heat sinks and thus ensure the performance of electronic components. The heat-conducting adhesives are synthetic resins that are enriched with appropriate metallic or inorganic fillers. The best thermal conductivity values can be achieved with metallic fillers such as silver or graphite. However, this also makes the adhesive electrically conductive, which is not desirable in many applications. In order to achieve pure thermal conductivity with simultaneous electrical insulation, adhesives must be used that are mixed with ceramic or mineral fillers.

Compared to thermal pastes, thermally conductive adhesives have the advantage that they not only dissipate the high thermal energy, but also serve to fix and fasten components.

A motor vehicle headlight according to the invention can be used and tuned particularly flexibly, in which the carrier body has at least one holding device with which the at least one sub-circuit board equipped with the light source can be fixed to the carrier body in its position pivoted at an angle of inclination relative to the base circuit board, wherein The inclination angle of the sub-circuit board attached to it can preferably be adjusted with the holding device.

The sub-printed circuit boards can also be mounted on at least one carrier body on corresponding holding devices which are arranged on the carrier body. For example, wedge-shaped or obliquely arranged screw mounts or clamp mounts can be used to fasten the sub-circuit boards in fixed positions pivoted at angles of inclination relative to the base circuit board. Likewise, within the scope of the invention, various designs of optics holders known per se, which are arranged on the at least one support body, can serve as press holders for fastening the sub-printed circuit boards. Such holding devices are preferably designed to be movable and allow fine adjustment of the angle of inclination of the sub-printed circuit boards already attached to them in relation to the plane of the base printed circuit board or in relation to a selected assembly plane.

In a motor vehicle headlight according to the invention, the at least one light source arranged on the sub-circuit board can expediently be designed as an SMD LED module, as a COB LED module or as a MCOB LED module. A so-called SMD LED module (surface-mount device light-emitting diode module) is an embodiment variant of an LED module in which LED chips are attached to printed circuit boards (printed circuit boards, PCB) using SMT technology (surface-mount technology). An SMD LED module can optionally be designed so that it functions independently and is ready for use, or that it can be integrated, for example plugged in, in a functional unit with a corresponding power supply and corresponding control lines for controlling the individual electronic components. Other types of LED illuminants include the newer and more powerful COB (chip on board) and MCOB (Multi-COB) technology.

• Flexiblere Abstimmung in Bezug auf die Neigung und Positionierung auch von einzelnen Lichtquellen, die auf einer Leiterplatte angeordnet sind;
• Geringere Fertigungskosten aufgrund einer reduzierten Anzahl an Leiterplatten;
• Geringere Herstellungskosten der Leiterplatten, da im Rahmen der Erfindung bevorzugt mehrlagige Standard-Leiterplatten, welche nicht auf Aluminium-Trägerplatten laminiert sind, eingesetzt werden können;
• Unterstützung der Leiterplatten durch einen oder mehrere Trägerkörper nur im Bereich der verkippten bzw. geneigten Sub-Leiterplatten erforderlich;
• Verwendung von für Kraftfahrzeuge zugelassenen Standard-LEDs auch für Anwendungen mit schräg verkippten bzw. geneigten Hauptabstrahlrichtungen möglich.

With this embodiment according to the invention, at least the following advantages can thus be mentioned compared to the "circuit boards on aluminum" that have previously been used for vehicle headlights and are difficult to manufacture:

• More flexible coordination with regard to the inclination and positioning of individual light sources that are arranged on a circuit board;
• Lower manufacturing costs due to a reduced number of printed circuit boards;
• Lower manufacturing costs of the printed circuit boards, since within the scope of the invention, preference is given to using standard multilayer printed circuit boards which are not laminated on aluminum carrier boards;
• Support of the printed circuit boards by one or more carrier bodies only required in the area of the tilted or inclined sub-printed circuit boards;
• Standard LEDs approved for motor vehicles can also be used for applications with tilted or inclined main emission directions.

• Bereitstellen einer Leiterplatte mit einer Grund-Leiterplatte, mit zumindest einer Sub-Leiterplatte, die mit zumindest einer Lichtquelle bestückt ist, sowie mit zumindest einem flexiblen Leiterplattenabschnitt, welcher die Grund-Leiterplatte mit der zumindest einen Sub-Leiterplatte beweglich verbindet;
• Bereitstellen zumindest eines Trägerkörpers, der dazu eingerichtet ist, in einer mit der Sub-Leiterplatte verbundenen Position die zumindest eine Sub-Leiterplatte in einer unter einem Neigungswinkel relativ zur Grund-Leiterplatte verschwenkten Lage zu fixieren;
• Überführen der zumindest einen mit einer Lichtquelle bestückten Sub-Leiterplatte entlang einer räumlichen Bewegungsbahn insbesondere durch Verkippen, Verschwenken und/oder Verdrehen in eine unter einem Neigungswinkel relativ zur Grund-Leiterplatte verschwenkte Lage, in welcher die zumindest eine Sub-Leiterplatte zumindest abschnittsweise an dem zumindest einen Trägerkörper und/ oder an zumindest einer Halteeinrichtung des Trägerkörpers anliegt;
• Fixieren der zumindest einen mit einer Lichtquelle bestückten Sub-Leiterplatte an dem zumindest einen Trägerkörper in einer unter einem Neigungswinkel relativ zur Grund-Leiterplatte verschwenkten Lage, wobei das von der zumindest einen Lichtquelle erzeugte Licht unter diesem Neigungswinkel von der zumindest einen Lichtquelle in Richtung des optischen Systems abgestrahlt wird;
• Montieren der Leiterplatte samt dem zumindest einen Trägerkörper, welcher an der zumindest einen Sub-Leiterplatte befestigt ist, in Einbaulage innerhalb des Kraftfahrzeugscheinwerfers.

The above-mentioned objects are also achieved with a method according to the invention for aligning at least one light source of a motor vehicle headlight in the direction of an optical system, the at least one light source having at least one light-emitting surface and being set up to emit generated light from the light-emitting surface. Such a process comprises the following steps:

• Providing a circuit board with a base circuit board, with at least one sub-circuit board which is equipped with at least one light source, and with at least one flexible circuit board section which movably connects the base circuit board to the at least one sub-circuit board;
• Providing at least one carrier body which is set up to fix the at least one sub-circuit board in a position connected to the sub-circuit board in a position pivoted at an inclination angle relative to the base circuit board;
• Transfer of the at least one sub-printed circuit board equipped with a light source along a spatial movement path, in particular by tilting, pivoting and / or rotating, into a position pivoted at an angle of inclination relative to the base printed circuit board, in which the at least one sub-printed circuit board at least in sections on the at least one a support body and / or abuts at least one holding device of the support body;
• Fixing the at least one sub-circuit board equipped with a light source to the at least one carrier body in a position pivoted at an angle of inclination relative to the base circuit board, the light generated by the at least one light source at this angle of inclination from the at least one light source in the direction of the optical System is emitted;
• Assemble the printed circuit board together with the at least one carrier body, which is fastened to the at least one sub-printed circuit board, in the installed position within the motor vehicle headlight.

With regard to the advantages of this method according to the invention, reference is made to the advantages and advantageous effects already discussed above with reference to the motor vehicle headlight according to the invention, which analogously also apply to the alignment method according to the invention.

In a further advantageous embodiment of the method according to the invention, the circuit board can have a plurality of sub-circuit boards each equipped with at least one light source, which are movably connected to the base circuit board with flexible circuit board sections, the plurality of sub-circuit boards each equipped with light sources are connected to the at least one carrier body in fixed positions pivoted at individual angles of inclination relative to the base circuit board, and the main light beam directions emitted by the light sources arranged on the plurality of sub-circuit boards are aligned in the direction of the at least one optical system.

If necessary, the individual populated sub-circuit boards can be fixed individually and independently of one another in installation positions that also enable oblique main emission directions of the emitted light beams in relation to the plane of the base circuit board. The alignment of the emitted light beams in the direction of one or more optical systems can thus be set particularly flexibly.

In a development of the method according to the invention, the motor vehicle headlight can comprise at least two optical systems, at least one first sub-circuit board equipped with a light source being connected to the at least one carrier body in a fixed position pivoted at a first inclination angle relative to the base circuit board, wherein the light beams emitted by the light source arranged on this sub-printed circuit board are oriented in the direction of the first optical system in accordance with their main light beam direction, and at least one second sub-printed circuit board equipped with a light source in a fixed position pivoted relative to the main printed circuit board at a second inclination angle is connected to the at least one carrier body, the light beams emitted by the light source arranged on this sub-printed circuit board being aligned in the direction of the second optical system according to their main light beam direction.

In this way, for example, different optical systems, which are provided for different lighting functions such as low beam, parking light, flashing light, cornering light or high beam, can be supplied with individually adjusted, optimally aligned light beams that are emitted by the respectively assigned light sources.

It can be particularly expedient if, in a method according to the invention, the at least carrier body is designed as a heat sink and the at least one sub-circuit board equipped with the light source is attached in a pivoted, fixed position, preferably with a heat-conducting adhesive layer, on at least one support surface of the carrier body .

Here, too, reference is made to the advantages of using a heat sink as the support body, which have already been discussed above. The heat sink is expediently made of a heat-conducting metal, preferably of aluminum and / or copper or corresponding alloys. Due to the preferential use of a thermally conductive adhesive for flat Attachment of the at least one sub-circuit board to the heat sink, the waste heat of the light sources can be dissipated particularly efficiently through the sub-circuit board into the heat sink attached or glued to the rear of the sub-circuit board during operation of the motor vehicle headlight. Appropriate plated-through holes for improving the vertical heat conduction, so-called thermal vias, can also expediently be provided in the sub-circuit board in place of the attached light sources.

It can be particularly economical if a method according to the invention is used in a motor vehicle headlight according to the invention, a multilayer standard printed circuit board being provided as the printed circuit board, in which at least one sub-printed circuit board is at least partially separated from the main printed circuit board by means of milled exemptions and in which the structure of the flexible circuit board section has fewer layers or layers in comparison to the main circuit board and / or the at least one sub-circuit board.

The production of corresponding exemptions, for example by means of deep milling on a multilayer standard printed circuit board, in order to create one or more flexibly movable sub-printed circuit boards within the printed circuit board is inexpensive.

It can be disadvantageous here that the printed circuit board has a reduced stability in the area of the exposed sub-printed circuit boards until it is installed in the installed position within the motor vehicle headlight.

In order to further simplify the assembly process with light sources and also to increase the stability and reliability of the printed circuit boards, such a standard printed circuit board is preferably provided, in which at least one securing web is provided, which is arranged in the area of the release and the basic printed circuit board and the base - Connects the circuit board with the at least one sub-circuit board, which is equipped with at least one light source, and secures the at least one assembled sub-circuit board in a starting position in the plane of the circuit board. The at least one securing web can particularly preferably be severed together with the release of the panel separation joints, for example by means of a milling tool.

With the method according to the invention, a particularly cost-effective and flexible assembly or alignment method is specified which allows individual light sources arranged on sub-printed circuit boards to be mounted in a vehicle headlamp housing in an individually coordinated position relative to one another in the most cost-effective manner possible.

• Fig. 1 in einer Schnittansicht von der Seite ein Detail eines erfindungsgemäßen Kraftfahrzeugscheinwerfers mit mehreren in geneigter Lage fixierten Sub-Leiterplatten, wobei die von den Lichtquellen abgestrahlten Lichtstrahlen in Richtung eines optischen Systems ausgerichtet werden;
• Fig. 2A in einer Schnittansicht von der Seite ein Detail eines erfindungsgemäßen Kraftfahrzeugscheinwerfers mit einer in geneigter Lage fixierten Sub-Leiterplatte;
• Fig. 2B in einer Draufsicht die in Fig. 2A gezeigte Anordnung;
• Fig. 3 in einer Schnittansicht eine relativ zur Grund-Leiterplatte verkippte Sub-Leiterplatte;
• Fig. 4A bis Fig. 4E jeweils einzelne Schritte der Herstellung einer Sub-Leiterplatte innerhalb einer standardmäßigen mehrlagigen Leiterplatte, wobei die Abbildungen Fig. 4A bis 4C jeweils Draufsichten zeigen und die beiden Abbildungen Fig. 4D und 4E die Sub-Leiterplatte in einer isometrischen Schrägansicht von vorne zeigen;
• Fig. 5 in einer isometrischen Schrägansicht von vorne eine weitere erfindungsgemäße Variante, bei der eine Sub-Leiterplatte in geneigter Lage an einem Trägerkörper mit Hilfe einer Halteeinrichtung befestigt ist;
• Fig. 6 in einer isometrischen Schrägansicht von vorne eine alternative erfindungsgemäße Variante, bei der eine Sub-Leiterplatte in geneigter Lage an einer Halteeinrichtung eines Trägerkörpers befestigt ist.

The invention will now be explained in more detail using exemplary embodiments with reference to the schematic drawings. Show it:

• Fig. 1 in a sectional view from the side a detail of a motor vehicle headlight according to the invention with a plurality of sub-circuit boards fixed in an inclined position, the light beams emitted by the light sources being aligned in the direction of an optical system;
• Figure 2A in a sectional view from the side a detail of a motor vehicle headlight according to the invention with a sub-circuit board fixed in an inclined position;
• Figure 2B in a top view the in Figure 2A arrangement shown;
• Fig. 3 in a sectional view a sub-circuit board tilted relative to the base circuit board;
• 4A to 4E Individual steps of producing a sub-circuit board within a standard multi-layer circuit board, the illustrations 4A to 4C each show top views and the two illustrations Figures 4D and 4E show the sub-circuit board in an isometric oblique view from the front;
• Fig. 5 in an isometric oblique view from the front a further variant according to the invention, in which a sub-printed circuit board is attached in an inclined position to a carrier body with the aid of a holding device;
• Fig. 6 in an isometric oblique view from the front, an alternative variant according to the invention, in which a sub-printed circuit board is attached in an inclined position to a holding device of a carrier body.

The assignment of terms with regard to their location or orientation, such as "horizontal", "vertical", "in the horizontal direction", "in the vertical direction", "above", "below", "in front", "below", " above "etc. are chosen in the following description only for the sake of simplicity and may refer to the illustration in the drawings, but not necessarily to a position in use or installation of the lighting device or the motor vehicle headlight.

Fig. 1 shows a detail of a motor vehicle headlight 1 according to the invention with a plurality of light sources 10, each of which has a light-emitting surface 11 here. The motor vehicle headlight 1 further comprises an optical system 20, which here has an optical lens 21, for example. The light sources 10 are set up to emit generated light from the light-emitting surfaces 11 in the main light beam directions S ₁ , S _{2 of} the optical system 20 outlined as dash-dotted arrows S ₁ , S ₂ . The optical system 20 is set up to emit light in the light beam direction S outlined as a dash-dotted arrow S onto a roadway.

The printed circuit board 30 used here comprises a basic printed circuit board 31, flexible printed circuit board sections 32 and two sub-printed circuit boards 33 each equipped with a light source 10. The flexible printed circuit board sections 32 are between the basic printed circuit board 31 and the sub-printed circuit boards 33 and connect them movably to the main printed circuit board. Furthermore, a carrier body 40 is provided, which is arranged on the underside of the sub-printed circuit boards 33, that is to say on those rear sides facing away from or opposite the light sources 10 on the upper side of the sub-printed circuit boards 33. The carrier body 40 is designed in such a way that it can be connected at least in sections to the sub-printed circuit boards 33 and is designed to be in a position connected to the sub-printed circuit board 33 - as here in FIG Fig. 1 illustrated - to fix the sub-printed circuit boards 33 in pivoted positions, the pivoted positions being able to be fixed at individually adjustable inclination angles α, β relative to the plane of the base printed circuit board 31.

Right in the picture from Fig. 1 the first light source 10 is shown, which is fixed in an inclined position at an inclination angle α, measured between the right sub-printed circuit board 33 and the base printed circuit board 31, on a corresponding contact surface 41 of the carrier body 40. Left in the picture from Fig. 1 Shown is the second light source 10, which in an inclined position at an angle of inclination β, measured between the left sub-printed circuit board 33 and the base printed circuit board 31, is also fixed lying on a corresponding contact surface 41 of the carrier body 40. The carrier body 40 is designed here in one piece, for example, and is manufactured as a heat sink 45 from a heat-conducting material. In order to achieve good heat-conducting fastening between the support surfaces 41 of the carrier body 40 or here the heat sink 45 and the sub-printed circuit boards 33 lying thereon, these are each glued to the support surfaces 41 with a heat-conducting adhesive layer 50. The carrier body 40 here has two ramp-shaped or wedge-shaped elevations which protrude from it at the angles of inclination α, β with respect to an upper side of the otherwise flat or flat carrier body 40. Using the carrier body 40, the two sub-circuit boards 33 equipped with light sources 10 can thus be fixed in such a way that the light generated is emitted by the light sources 10 at precisely these inclination angles α, β - relative to the plane of the base circuit board 31 - and that emitted light beams or main light beam directions of the light sources 10 can be aligned in the direction of the optical system 20.

As PCB 30 comes in here Fig. 1 a multilayer standard printed circuit board is used, in which the sub-printed circuit boards 33 are separated in sections from the basic printed circuit board 31 by means of milled exemptions 35 and in which the flexible printed circuit board section 32 has fewer layers in comparison to the basic printed circuit board 31 and the sub-printed circuit boards 33 or layers.

In Fig. 1 one recognizes in a schematic view a motor vehicle headlight 1 according to the invention with its components essential for the explanation of the invention. It is clear to the person skilled in the art that a motor vehicle headlight has a large number of others, here May have components not shown, such as setting and adjustment devices, electrical supply means, panels, housing components and much more. If the term “headlight” is used in connection with the invention, this term should also include individual light or projection modules, which can also be contained in combination in a higher-level headlight.

The two views of Figures 2A and 2B are discussed together below. A detail of a motor vehicle headlight 1 according to the invention with a sub-circuit board 33, which is fixed in a position inclined at an angle of inclination α, is shown. The one light source 10 of the assembled sub-circuit board 33 can be in the arrow direction B ₁ to identify the direction of movement from a first position in which the sub-circuit board 33 equipped with the at least one light source 10 and the at least one carrier body 40 are separated from one another in an unconnected position , along a spatial trajectory, in particular by tilting, pivoting and / or rotating into the second position shown here, in which the sub-circuit board 33 equipped with the light source 10 and the at least one carrier body 40 are fixed to one another in a connected position. The first position or starting position is not shown here for the sake of clarity. The optical system 20 used here is, for example, a schematically indicated reflector 22. Clearances 35 on three sides between the sub-printed circuit board 33 and the basic printed circuit board 31 surrounding it as well as the removal of layers in the area of the flexible printed circuit board section 32 ensure a flexibly movable adjustment of the Inclination of the sub-printed circuit board 33 thus exposed. The light generated, which is emitted from the light source 10 at the angle of inclination α, can be oriented in the direction of the optical system 20.

In Fig. 3 a multilayer standard printed circuit board is shown as the printed circuit board 30, in which the sub-printed circuit boards 33 are separated in sections from the basic printed circuit board 31 by means of milled exemptions 35 and in which the structure of the flexible printed circuit board section 32 in comparison to the basic printed circuit board 31 and the sub Printed circuit boards 33 has fewer layers or layers. The sub-circuit board 31 is not yet connected to a carrier body and can therefore be moved back and forth in its inclination in relation to the plane of the base circuit board 31 in the direction of the arrow B ₁ to identify the direction of movement. In this way, for example, an individual angle of inclination .alpha. Can be set and fixed in its inclined position by contact with one or more corresponding support bodies.

The illustrations 4A to 4E each show individual steps in the production of a sub-printed circuit board 33 within a standard multilayer printed circuit board 30. In order to further simplify the assembly process with light sources 10 and also to increase the stability and reliability of the printed circuit boards used, one is preferably used Standard circuit board 30 is provided, in which at least one securing web 36 is provided, which, in the area of the clearance 35, the base circuit board 31 and the at least one sub-circuit board 33, which is equipped with at least one light source 10, during the assembly with the corresponding ones connects optical and / or electronic components. The one in here Figure 4A Fuse web 36 shown thus secures the already populated sub-circuit board 33 in its starting position in the plane of the circuit board 30 or in the plane of the surrounding base circuit board 31. The fuse web 36 can preferably be installed just before or during assembly of the base, for example PCB 31 are cut in their installed position within the motor vehicle headlight 1, which in Figure 4B is illustrated. For this purpose, the securing web 36 is severed with a cutting tool 37 or here with a milling cutter in the direction of movement 38 of the cutting tool 37 - symbolized by the arrow 38. Figure 4C already shows the area of the sub-printed circuit board 33 which is accordingly exposed on three sides. The two figures Figures 4D and 4E show the pivoting of the assembled sub-circuit board 33 in the direction of movement B ₁ until an individual inclination angle α is set in relation to the plane of the base circuit board 31. A carrier body (not shown here) and / or corresponding holding devices, which are expediently connected to the carrier body, can subsequently serve to fix the tilted position of the inclined sub-printed circuit board 33 and to fix the radiation angle of the light beams from the light source 10.

With the alignment method according to the invention, a particularly cost-effective and flexible assembly method is specified, which allows individual light sources 10 arranged on sub-printed circuit boards 33 in the most cost-effective way in each case in individual, coordinated positioning and at individual angles of inclination - in deviation from a coplanar mounting position or alignment on the base circuit board - to be mounted relative to one another in a vehicle headlight housing 1.

Fig. 5 shows a further variant according to the invention, in which a sub-circuit board 33 is attached in an inclined position at an angle of inclination γ relative to the base circuit board 31 on a carrier body 40 in the form of a heat sink 45. The carrier body 40 has a flat contact surface 41 which bears against the rear or underside of the sub-circuit board 33 and to which the sub-circuit board 33 is glued with a heat-conducting adhesive layer 50. In addition, a holding device 55 in the form of a clamping bracket 56 is also provided here, which fixes the sub-printed circuit board 33 together with the heat sink 45 adhered thereto in its inclined position.

Fig. 6 shows a further alternative variant according to the invention, in which a sub-circuit board 33 is attached in an inclined position at an angle of inclination δ relative to the base circuit board 31 on a carrier body 40 in the form of a heat sink 45. The carrier body 40 is of multi-part design here and is also partially invisible below the level of the base circuit board 31 arranged and has a holding device 55 in the form of a tiltably mounted screw holder 57 which is fastened to the underside of the heat sink 45 of the sub-circuit board 33 and to the carrier body 40 and which fixes the sub-circuit board 33 in an inclined position at the angle of inclination δ. The heat sink 45 is articulated here to the multi-part carrier body 40. With such a screw holder 57, the angle of inclination of the light source 10 on the sub-circuit board 33 can advantageously be fine-adjusted if necessary, without having to replace the carrier body 40.

LIST OF REFERENCES

1

Motor vehicle headlights

10th

Light source

11

Light-emitting surface of the light source

20th

optical system

21st

optical lens

22

reflector

30th

Circuit board

31

Basic circuit board

32

flexible circuit board section

33

Sub circuit board

35

Exemption between sub-circuit board and base circuit board

36

Safety bar

37

Cutting tool, milling cutter

38

Direction of movement of the cutting tool (arrow)

40

Carrier body

41

Contact surface of the carrier body

45

Heatsink

50

Adhesive layer

55

Holding device

56

Clamp bracket

57

Screw bracket

B ₁

Direction of movement (double arrow)

S ₁

Main light beam direction from the (first) light source (arrow)

S ₂

Main light beam direction from another light source (arrow)

S

Direction of light rays from the optical system (arrow)

α

Inclination angle between (first) sub-circuit board and base circuit board

β, γ, δ

Tilt angle between additional sub-circuit boards and base circuit board

Claims (17)

Motor vehicle headlight (1) with at least one light source (10) which is arranged on a printed circuit board (30) and with at least one optical system (20), the at least one light source (10) having a light-emitting surface (11) and being set up for this purpose is to emit generated light from the light-emitting surface (11) in the direction (S ₁ ) of the optical system (20), and the optical system (20) is set up to emit light in a desired beam direction (S) as on a roadway, characterized in that the printed circuit board (30) has a basic printed circuit board (31), at least one sub-printed circuit board (33) equipped with the at least one light source (10) and at least one flexible printed circuit board section (32) which supports the basic printed circuit board ( 31) movably connects to the at least one sub-printed circuit board (33), the sub-printed circuit board (33) being connectable, at least in sections, to at least one carrier body (40) and the at least one t a carrier body (40) is set up to, in a position connected to the sub-printed circuit board (33), the at least one sub-printed circuit board (33) in a position pivoted relative to the base printed circuit board (31) at an angle of inclination (a) fix, the generated light being emitted at this inclination angle (a) from the at least one light source (10). Motor vehicle headlight (1) according to claim 1, characterized in that the at least one light source (10) from a first position in which the sub-circuit board (33) equipped with the at least one light source (10) and the at least one carrier body (40) are separated from one another in an unconnected position, along a spatial movement path, in particular by tilting, pivoting and / or rotating into a second position, in which the sub-circuit board (33) equipped with the light source (10) and the at least one carrier body (40) in a connected position are fixed together, can be transferred. Motor vehicle headlight (1) according to claim 1 or 2, characterized in that the printed circuit board (30) is a multi-layer standard printed circuit board, in which at least one sub-printed circuit board (33) is milled at least in sections from the base printed circuit board (35) by means of cutouts (35). 31) is separated and in which the flexible circuit board section (32) has fewer layers or layers in comparison to the main circuit board (31) and / or the at least one sub circuit board (33). Motor vehicle headlight (1) according to one of claims 1 to 3, characterized in that in the fixed position pivoted at an angle of inclination (a) relative to the base circuit board (31), with the at least one light source (10) equipped sub-circuit board (33), in which the sub-circuit board (33) is connected to the at least one carrier body (40), the main light beam direction (S ₁ ) emitted by the at least one light source (10) in the direction of the at least one an optical system (20) is aligned. Motor vehicle headlight (1) according to one of claims 1 to 4, characterized in that in the fixed position of a sub-circuit board (33) equipped with a plurality of light sources (10) and pivoted at an inclination angle (a) relative to the base circuit board (31) , in which the sub-printed circuit board (33) is connected to the at least one carrier body (40), the main light beam directions (S ₁ , S ₂ ) emitted by the plurality of light sources (10) being aligned in the direction of the at least one optical system (20) . Motor vehicle headlight (1) according to one of claims 1 to 5, characterized in that the printed circuit board (30) has a plurality of sub-printed circuit boards (33) each equipped with at least one light source (10), which have flexible printed circuit board sections (32) with the base Printed circuit board (31) are movably connected, the plurality of sub-printed circuit boards (33) equipped with light sources (10) each having fixed positions pivoted relative to the base printed circuit board (31) at individual angles of inclination (α, β, γ, δ) to which at least one carrier body (40) are connected. Motor vehicle headlight (1) according to one of claims 1 to 6, characterized in that the circuit board (30) has a plurality of sub-circuit boards (33) each equipped with at least one light source (10), which are arranged in a matrix with one another, the plurality with light sources (10) equipped sub-printed circuit boards (33) are each connected to the at least one carrier body (40) in fixed positions pivoted at individual angles of inclination (α, β, γ, δ) relative to the base printed circuit board (31). Motor vehicle headlight (1) according to one of claims 1 to 7, characterized in that the motor vehicle headlight (1) comprises at least two optical systems (20), at least one first sub-circuit board (33) equipped with light sources (10) in one under one the first inclination angle (a), which is pivoted relative to the base circuit board (31), is connected to the at least one carrier body (40) and the main light beam direction (S ₁ ) emitted by the at least one light source (10) in the direction of a first optical system ( 20) and at least one second sub-circuit board (33) equipped with light sources (10) at a second inclination angle (β) relative to the base circuit board (31) pivoted, fixed position is connected to the at least one carrier body (40) and the main light beam direction (S ₁ ) emitted by the at least one light source (10) is oriented in the direction of a second optical system (20). Motor vehicle headlight (1) according to one of claims 1 to 8, characterized in that the at least one carrier body (40) has at least one bearing surface (41) on which at least one sub-circuit board (33) equipped with the light source (10) is in its is connected to the support body (40) connected position. Motor vehicle headlight (1) according to one of claims 1 to 9, characterized in that the at least one support body (40) is designed as a heat sink (45) and the at least one sub-circuit board (33) equipped with the light source (10) on the at least a bearing surface (41) of the carrier body (40) is attached in a heat-conducting manner, preferably with a heat-conducting adhesive layer (50). Motor vehicle headlight (1) according to any one of claims 1 to 10, characterized in that the carrier body (40) has at least one holding device (55) with which the at least one sub-circuit board (33) equipped with the light source (10) in its lower an angle of inclination (a) relative to the base circuit board (31) pivoted position on the carrier body (40) can be fixed, preferably with the holding device (55) the angle of inclination (a) of the sub-circuit board (33) attached to it can be adjusted. Motor vehicle headlight (1) according to one of claims 1 to 11, characterized in that the at least one light source (10) arranged on the sub-circuit board (33) is designed as an SMD LED module, a COB LED module or a MCOB LED module. Method for aligning at least one light source (10) of a motor vehicle headlight (1) in the direction of an optical system (20), the at least one light source (10) having at least one light-emitting surface (11) and being set up to generate light generated by the light-emitting Surface (11), comprising the following steps: - Providing a circuit board (30) with a base circuit board (31), with at least one sub-circuit board (33), which is equipped with at least one light source (10), and with at least one flexible circuit board section (32), which is the base - PCB (31) with the at least one sub-circuit board (33) movably connects; - Providing at least one carrier body (40), which is set up to, in a position connected to the sub-circuit board (33), the at least one sub-circuit board (33) at an angle of inclination (a) relative to the base circuit board (31 ) fix the swiveled position; - transferring the at least one sub-circuit board (33) equipped with a light source (10) along a spatial movement path, in particular by tilting, pivoting and / or rotating into a position pivoted at an angle of inclination (a) relative to the base circuit board (31), in which the at least one sub-circuit board (33) bears at least in sections on the at least one carrier body (40) and / or on at least one holding device (55) of the carrier body (40); - Fixing the at least one sub-circuit board (33) equipped with a light source (10) to the at least one carrier body (40) in a position pivoted at an angle of inclination (a) relative to the base circuit board (31), the position of the at least one a light source (10) generated light is emitted at this inclination angle (a) from the at least one light source (10) in the direction of the optical system (20); - Mounting the printed circuit board (30) together with the at least one carrier body (40), which is fastened to the at least one sub-printed circuit board (33), in the installed position within the motor vehicle headlight (1). Method according to Claim 13, characterized in that the printed circuit board (30) has a plurality of sub-printed circuit boards (33) each equipped with at least one light source (10), which are movably connected to the base printed circuit board (31) by flexible printed circuit board sections (32) , The plurality of sub-printed circuit boards (33) equipped with light sources (10) each having fixed layers with the at least one carrier body (40) pivoted relative to the base printed circuit board (31) at individual angles of inclination (α, β, γ, δ). are connected, and the main light beam directions (S ₁ , S ₂ ) emitted by the light sources (10) arranged on the plurality of sub-printed circuit boards (33) are aligned in the direction of the at least one optical system (20). A method according to claim 14, characterized in that the motor vehicle headlight (1) comprises at least two optical systems (20), at least one first sub-printed circuit board (33) equipped with a light source (10) relative to one another at a first inclination angle (a) to the base circuit board (31) pivoted, fixed position is connected to the at least one carrier body (40), the main light beam direction (S ₁ ) emitted by the light source (10) arranged on this sub-circuit board (33) being directed in the direction of the first optical one Systems (20) is aligned, as well as at least one second sub-circuit board (33) equipped with a light source (10) in a fixed position with the at least one carrier body (pivoted at a second inclination angle (β) relative to the base circuit board (31) 40), the main light beam direction (S ₂ ) emitted by the light source (10) arranged on this sub-circuit board (33) being aligned in the direction of the second optical system (20). Method according to one of claims 13 to 15, characterized in that the at least one carrier body (40) is designed as a cooling body (45) and the at least one sub-circuit board (33) equipped with the light source (10) on at least one contact surface (41 ) of the carrier body (40) is attached in a heat-conducting manner, preferably with a heat-conducting adhesive layer (50), in a pivoted, fixed position. Method according to one of claims 13 to 16, characterized in that a multilayer standard printed circuit board is provided as the printed circuit board (30), in which at least one sub-printed circuit board (33) is milled at least in sections from the base printed circuit board ( 31) is separated and in which the flexible circuit board section (32) has fewer layers or layers in comparison to the main circuit board (31) and / or the at least one sub circuit board (33), preferably at least one securing web (36) in the Area of the exemption (35) is arranged and connects the base circuit board (31) and the at least one sub-circuit board (33), which is equipped with at least one light source (10), and the at least one assembled sub-circuit board (33 ) in a starting position in the plane of the circuit board (30).

Images