DE102016218139A1 - lighting device - Google Patents

Abstract

A lighting device (1) has a light source (2), in particular a semiconductor light source, for generating primary light (P), a transmitted-light optical system (3) spaced from the light source (2) and a phosphor body (4) for at least partially converting the primary light (P). in secondary light (S), on, wherein the phosphor body (4) in the transmitted light optical system (3) is housed. The invention is particularly applicable to the field of vehicle lighting, stage lighting, effect lighting, room lighting, general lighting, etc. The invention is particularly applicable in the context of a headlamp.

Description

The invention relates to a lighting device, comprising a light source, in particular a semiconductor light source, for generating primary light, a transmitted light optics spaced from the light source and a phosphor body for at least partially converting the primary light into secondary light. The invention also relates to a lighting device, comprising a sheet metal frame, to which a light source for generating primary light is attached. The invention is particularly applicable to the field of vehicle lighting, stage lighting, effect lighting, room lighting, general lighting, etc. The invention is particularly applicable in the context of a headlamp.

For typical applications in the LARP ("Laser Activated Remote Phosphor") technology, multiple optical elements must be placed in an optical path corresponding to the application. These include, but are not limited to, one or more laser diodes, primary optical elements, phosphor bodies, and secondary optical elements. For their arrangement, a mechanical support concept must be found. Also, a distance and a lateral alignment of these elements have to be adjusted to each other. The cost of producing and adjusting such a LARP arrangement is high.

It is the object of the present invention to at least partially overcome the disadvantages of the prior art and, in particular, to provide a possibility for the simplified production of a LARP arrangement.

This object is achieved according to the features of the independent claims. Preferred embodiments are in particular the dependent claims.

The object is achieved by an illumination device, comprising a light source for generating primary light, a transmitted light optics spaced from the light source and a phosphor body for at least partially converting the primary light into secondary light, wherein the phosphor body is housed or arranged in the transmitted light optical system.

By accommodating the phosphor body in the transmitted-light optical system, its position relative to one another can be precisely determined so that a subsequent adjustment of the phosphor body to the transmitted-light optical system during assembly of the lighting device can be dispensed with. In addition, the composite combination of phosphor body and transmitted light optics can be made separately from the other components, easy to handle and complex shapes.

In this illumination device, therefore, the primary light is coupled into the transmitted light optics at a light entry surface, passes through part of the transmitted light optics, strikes the phosphor body and is at least partially converted by the phosphor body into secondary light. The secondary light and possibly remaining (unconverted) primary light is radiated from the phosphor body, passes through a further part of the transmitted light optics and at least partially reaches a light exit surface of the transmitted light optics, at which it is coupled out as useful light.

The lighting device may have one or more light sources. In the presence of multiple light sources, the primary light generated by them can be combined to form a common light beam. Alternatively, a plurality of light sources may illuminate the phosphor body with differently oriented, e.g. angularly offset, and / or irradiate with light beams of different wavelengths. The primary light emitted by the at least one light source can be radiated directly onto the light entry surface. Alternatively, at least one optical element which directs the emitted primary light to the light entry surface may be present between the light source and the light entry surface. Such an optical element may e.g. an optical fiber, a hollow Lichtleitrohr, a reflector, a lens, etc. include.

The type of the light source is not limited, so that the lighting device is not limited to a LARP arrangement. Due to their high luminous flux, high durability, compact size and their adjustable light spectrum, it is a preferred development that the light source is a semiconductor light source.

It is a development that the semiconductor light source comprises or comprises at least one diode laser. However, the light source may also include at least one other type of laser. This does not need to be a diode laser.

It is a further development that the semiconductor light source comprises or has at least one light-emitting diode. The at least one light-emitting diode can be in the form of at least one individually housed light-emitting diode or in the form of at least one LED chip. Several LED chips can be mounted on a common substrate ("submount"). The at least one light emitting diode may be equipped with at least one own and / or common optics for beam guidance, for example at least one Fresnel lens, collimator, and so on. Instead of or in addition to inorganic Light-emitting diodes, eg based on InGaN or AlInGaP, can generally also be used with organic LEDs (OLEDs, eg polymer OLEDs).

The phosphor body is an extended body on which a light spot can be generated by the primary light. The phosphor body may in particular be larger than the light spot. The phosphor body can be handled independently, for example by means of a gripper. The phosphor body is therefore not just a powder particle or particles. It is a development that the phosphor body is a powder block, for example, in a pressed form and encapsulated by a suitable material (e.g., silicone, resin). It is a further development that the phosphor body has dispersed phosphor particles embedded in a translucent base or substrate material (e.g., resin or glass), e.g. dispersed phosphor powder therein. Alternatively, the phosphor body may be integrally formed of wavelength-converting ceramic, for example, cerium-doped yttrium-aluminum garnet (Ce: YAG).

It is a further development that the transmitted-light optical system as such is free from phosphor powder or that no phosphor powder is distributed in the transmitted-light optical system.

It is still a further development that the phosphor body is a platelet-shaped phosphor body, for example consisting of wavelength-converting ceramic (ceramic phosphor plate).

The phosphor body has at least one phosphor which is suitable for converting or converting the incident primary light at least partially into secondary light of different wavelengths. If there are a plurality of phosphors, these can generate secondary light of mutually different wavelengths. The wavelength of the secondary light may in particular be longer (so-called "down conversion") than the wavelength of the primary light. For example, blue primary light can be converted by means of a phosphor into green, yellow, orange or red secondary light. With only partial wavelength conversion or wavelength conversion, a mixture of secondary light and unconverted primary light is radiated from the phosphor body, which can serve as useful light. For example, white useful light can be generated from a mixture of blue, unconverted primary light and yellow secondary light. However, a full conversion is possible in which the useful light either no longer or only a negligible proportion in the useful light is present. A degree of conversion depends, for example, on a thickness and / or a phosphor concentration of the phosphor body. In the presence of a plurality of phosphors, secondary light components of different spectral composition can be generated from the primary light, e.g. yellow and red secondary light. For example, the red secondary light may be used to give the useful light a warmer hue, e.g. so-called "warm-white". In the presence of multiple phosphors, at least one phosphor may be capable of further wavelength converting secondary light, e.g. green secondary light in red secondary light. Such a light which is once again wavelength-converted from a secondary light may also be referred to as a "tertiary light".

One or more phosphor bodies can be accommodated in the transmitted-light optics. A transmitted-light optical system may, in particular, be understood to mean an optical element having a light-permeable body, through which body light is transmitted in the lighting device.

It is a development that the transmission optics is a potting, which allows a simple and inexpensive production even with complex shape. The transmitted light optics is in particular a one-piece produced potting. The transmission optics can be made of plastic or glass. In particular, if the transmission optics consists of plastic, it may be an injection molded body. The injection-molded body may be a single-component or multi-component injection-molded body. The material of the injection molded body may be thermoplastic resin (e.g., polycarbonate (PC) or polymethylmethacrylate (PMMA)), resin, etc.

It is an embodiment that the transmission optics consists of silicone. Silicone has the advantage that it has high resistance to UV radiation and blue light.

It is still an embodiment that the phosphor body is potted in the transmitted light optics. This provides the advantage that the lighting device is particularly easy to manufacture and robust.

It is a development that the phosphor body is embedded in the material of the transmitted-light optical system. Such a lighting device is very easy to produce. The phosphor body, for example, can be easily inserted into an injection mold and then injection molding material to produce the transmitted light optics attached. Also, the phosphor body is thus protected against dust, dirt, moisture and mechanical external influences. In addition, a particularly lossless light coupling is achieved in the transmitted light optics.

It is still an embodiment that the phosphor body in a recess of the Transmitted light optics is arranged. In particular, there may be a gap or distance between the phosphor body and the transmitted-light optical system. By at least local avoidance of a direct contact between the phosphor body and the transmitted-light optical system, a chemical reaction between the phosphor body and the transmitted-light optical system can be avoided particularly reliably. It is a further advantage that additional optical surfaces can be provided in the transmission optics for beam shaping, for example, depending on whether the phosphor body is located in the middle of a cavity or at its edge. This optical surface or surfaces can have any desired geometry, ie be convex, concave, multifaceted, designed as a TIR collimator, etc.

The recess can be produced during the potting process for producing the transmitted light optics, for example by releasing a predetermined spatial region, e.g. by providing correspondingly shaped tools.

It is a development that the recess is an open recess. This results in the advantage that the phosphor body can be introduced into this after production of the transmitted-light optical system. Further advantages result from the simple exchangeability of the phosphor body and / or from the possibility of being able to use mobile phosphor bodies (for example a phosphor wheel).

It is another development that the recess is a closed recess. This results in the advantage that the phosphor body is particularly reliably protected against environmental influences. The recess may be filled with predetermined gases, e.g. with noble gas.

It is a further embodiment that the transmitted-light optical system has at least one cavity which can be irradiated by the phosphor body, in particular a beam-forming cavity. This cavity or recess is selectively introduced into the transmitted light optics, in particular at a predetermined position with a predetermined wall or freely definable boundary surfaces. As a result, the advantage is achieved that by means of the transmitted light optics a particularly multi-shaped and complex beam shaping in a small space can be implemented with simple means. The beam shaping can be adjusted by the number, the size and / or the shape of the beam-forming cavities. Such a cavity differs by its specific positioning and shape, for example, introduced as scattering volumes groups of small cavities, which serve only as scattering centers.

It is a further embodiment that the cavity has spherical and / or non-spherical (i.e., not formed as a sphere) portions. This allows directional beam shaping, in particular collimating and / or imaging beamforming, e.g. like a lens. For example, a region of the wall may have any geometry, e.g. convex, concave, multifaceted, designed as a TIR collimator, etc.

It is yet another embodiment that at least one cavity is located between a light entry surface for the primary light and the phosphor body. As a result, this cavity can advantageously be used to shape the beam of the primary light coupled into the transmitted-light optical system onto the phosphor body for a desired form of irradiation, in particular also to set a desired beam profile. For example, this cavity may serve to approximately collimate or parallelize (eg, based on a distance of the light source to the phosphor body), e.g., primary light incident on the phosphor body, e.g. to an efficiency in the transmission through dichroic layers or the like. to increase in the further beam path. Alternatively, the cavity may serve to pre-focus on the phosphor body irradiating primary light. As a result, a focusing beam path is generated in relation to the distance from the light source to the phosphor body. In particular, if a focusing beam path is used, it is possible to selectively arrange the phosphor body inside or outside the focal point of the beam so as to adjust a size of the spot on the phosphor body as desired. In this case, the phosphor body can be positioned both in the divergent section and in the convergent section of the primary light beam or light beam. In this embodiment, the region of the transmitted light optics between the light entrance surface and the cavity as -. collimating or focusing - serve lens, wherein a wall surface of the cavity corresponds to its light exit surface. However, the shape of the beam-forming surfaces or surface areas is not limited and may be, for example, free-form, faceted (e.g., microlens array-like, for example, to adjust a "top hat" beam profile), and so on.

The size of the light spot on the phosphor body advantageously has an extension of at least 20 microns, more preferably an extension between 50 microns and 500 microns (eg, depending on a selected application and luminance requirement). In particular, if a lower luminance is justifiable, a maximum extent of up to 5000 micrometers can also be advantageous. These values apply in particular to irradiation with an incident radiation power between 0.25 Watt and 4 watts. These luminous spot expansion values can also be used for larger laser powers. They then lead to correspondingly higher achievable luminance. However, the extents of the spot are basically not limited. Thus, even higher light outputs make it possible to generate even larger, realistically usable light spot expansions without having to accept losses in luminance. For example, a doubling of the area defined by the maximum extent surface of the light spot when doubling the light output is possible, etc.

The spot may in particular be circular or stretched, e.g. oval or elliptical. A ratio of the lengths of the associated semi-axes (i.e., the major half-axis to the semi-minor axis) may advantageously be between two and five, in particular between two and four, for elongated spots. A circular spot has a ratio of one. The above-mentioned values for the extent or size of the luminous spot may relate in particular to the smaller semiaxis for elongated luminous spots. The spot is not limited to the sizes mentioned.

It is also an embodiment that there is at least one cavity between the phosphor body and a light exit surface for radiated from the phosphor body Nutzlicht. Such a cavity allows a particularly strong and / or multi-shaped light shaping of the useful light in a small space by simple means. The beam shaping can be adjusted by the number, the size and / or the shape of such cavities. Such a cavity also differs by its targeted positioning and shape of introduced as scattering volumes groups of small cavities, which serve only as scattering centers. It is also an embodiment for this that the cavity is partially spherically and / or non-spherically shaped. For example, a portion of the wall may be concave or convex, e.g. ellipsoid, paraboloid etc.

It is also an embodiment that the phosphor body is held by means of a holder and the holder is at least partially housed in the transmitted light optics. This makes it possible to achieve a particularly simple and accurate positioning of the phosphor body. The holder may be a metallic holder or a holder made of plastic or ceramic. In particular, a metallic or a ceramic holder can serve to dissipate heat from the phosphor body in a particularly efficient manner, which is advantageous for stabilizing the conversion efficiency. It is a development that the holder has one or more parts.

It is a development that the holder protrudes from the phosphor body. This advantageously allows a simple mechanical and possibly also thermal connection, e.g. to a heat sink such as a heat sink or the like.

It is an embodiment that the phosphor body rests on a transparent substrate, in particular a sapphire substrate, which is held, for example, by the holder. This allows a particularly precise handling and positioning of the phosphor body. In addition, sapphire has a high thermal conductivity, so that heat dissipation from the phosphor body can take place over a particularly large area and thus effectively. The holder can attack on the sapphire substrate. Instead of the sapphire substrate it is also possible to use any other suitable transparent, in particular transparent, material, e.g. a translucent ceramic, diamond, ITO, etc. However, a non-translucent substrate may also be used, especially if it has a recess through which the primary light can pass. It is also possible to connect the phosphor body directly to the holder, i.e., without a substrate (e.g., by brazing an AuSn coating).

It is also an embodiment that the light source is connected to the holder. As a result, the position of the light source to the phosphor body and the transmitted light optics is fixed and no longer needs to be adjusted. For example, the holder may be connected directly to the light source.

It is an advantageous for ease of handling and manufacturing development that the transmitted light optics, the phosphor body, the possibly existing holder and the possibly existing substrate are connected to a one-piece component to be handled. This can e.g. be achieved by encapsulation of the phosphor body, the possibly existing holder and the possibly existing substrate in the material of the transmitted light optics.

The object is also achieved by a lighting device, comprising a ladder-like metal part, in particular sheet metal part ("sheet metal frame"), arranged in a row with first to third cross braces, wherein on the first cross brace, a light source for generating primary light is fixed, in the direction of second transverse strut and the third transverse strut can be aligned, at the second cross member or the third cross member a phosphor body for at least partially converting the primary light is fixed in secondary light and at the third cross member or the second cross member a transmitted light optics is attached.

This lighting device has the advantage that the positions of all the elements present on the transverse struts along the row of transverse struts are fixed to one another precisely and practically invariably and thus no distance adjustment and no lateral adjustment need be performed any longer. In addition, the ladder-like sheet metal frame is particularly easy to produce, e.g. by punching, laser cutting, etc. from a sheet metal part.

The cross struts connect two longitudinal struts. The transverse struts may have the same or different distances from one another.

At least one transverse strut can be a continuous cross strut, which connects the longitudinal struts with each other. Such cross braces may have at least one portion having a breakthrough or a hole.

At least one transverse strut may be an interrupted transverse strut which has only lugs or "lugs" which are directed from one of the longitudinal struts to the respective other longitudinal strut. It is a development that the light source and the phosphor body are connected with through cross struts with recesses, which allows a particularly reliable and precise connection. It is still a development that a transmitted light optics is connected to non-continuous or interrupted cross struts, which prevents shading of the light passing through them. The transmitted light optics can thus be cast on the noses and include these, for example by the sheet metal frame in an injection mold, which produces the transmitted light optics, is inserted.

The light source, the phosphor body and the transmitted-light optics are optically arranged in series with each other, in basically any order.

The ladder-like sheet metal frame may also have further cross struts (eg at least one further cross strut between the first cross strut and the second cross strut, at least one further cross strut between the second cross strut and the third cross strut, at least one further cross strut behind the third cross strut, etc.) which optically active elements are present or which are designed as such optically active elements. Such optically active elements may include, for example, further transmitted light optics (such as lenses, etc.), collimators, apertures, other phosphor bodies, reflectors, etc.

In addition, it is a development that the ladder-like sheet metal frame in a row arranged first to fourth cross struts, wherein on the first cross strut, a light source for generating primary light is fixed, which is aligned in the direction of the second cross member and the third cross member, on the second Cross strut one (eg serving as primary optics) transmitted light optics is attached to the third cross member a phosphor body is fixed and on the fourth cross member another (eg secondary optics serving) transmitted light optics is attached.

It is an embodiment that the first transverse strut and that transverse strut (s) on which the light source and / or the - in particular flake-shaped - phosphor body is or are arranged, are rotated by 90 ° from a plane of sheet metal. By this alignability or rotatability, the light source and / or the phosphor body can be mounted very easily, and it can simultaneously achieve a particularly simple alignment of the light source and the phosphor body, without their positions along the longitudinal struts or along the longitudinal orientation of the ladder-like sheet metal frame noticeable to be changed. The rotation can be implemented with the help of a simple tool.

It is still an embodiment that the first transverse strut and the cross member, on which the light source or the phosphor body are arranged, have a respective recess, which is covered by the light source or the phosphor body. This allows a particularly reliable attachment of the light source and the phosphor body, for example by means of a bond, a soldering or by casting. The recesses allow easy accessibility of the light source and the phosphor body and an unobstructed beam path.

It is also an embodiment that the transmitted light optics is shed on the cross member assigned to it. Thus, the transmitted-light optics can be arranged particularly easily and reliably on the transverse strut.

It is a development that the lighting device described above is a vehicle lighting device or a part thereof. The vehicle may be a motor vehicle (eg, a car such as a passenger car, truck, bus, etc. or a motorcycle), a railroad, a watercraft (eg, a boat or a ship), or an aircraft (eg, an airplane or a helicopter). However, the lighting device is not limited thereto and may, for example, also for stage lighting, special lighting, room lighting, general lighting, etc. be used. The lighting device may in particular be a headlight. Consequently, the object is also achieved by a headlight, in particular for vehicles, for example for the production of low beam and / or high beam.

The above-described characteristics, features, and advantages of this invention, as well as the manner in which they will be achieved, will become clearer and more clearly understood in connection with the following schematic description of exemplary embodiments which will be described in detail in conjunction with the drawings. In this case, the same or equivalent elements may be provided with the same reference numerals for clarity.

1 shows a sectional side view of a lighting device according to a first embodiment;

2 shows a sectional side view of a lighting device according to a second embodiment without a light source;

3 shows a sectional side view of the lighting device according to the second embodiment with the light source;

4 shows a sectional side view of a lighting device according to a third embodiment;

5A shows a sectional side view of a phosphor body, a sapphire substrate and a metallic holder of a lighting device according to a fourth embodiment;

5B shows the components 5A in plan view;

5C shows a sectional side view of a silicone optics of the lighting device according to the fourth embodiment;

5D shows the silicone optics 5C as a sectional view in plan view;

6A shows in plan view components of a lighting device according to a fifth embodiment in a partially finished state; and

6B shows in plan view a section of the lighting device of 6A in a finished condition.

1 shows a lighting device 1 comprising a semiconductor light source in the form of a blue primary light P emitting laser diode 2 , The laser diode 2 is spaced to a transmitted light optics made of silicone ("silicone optics" 3 ) arranged.

In the silicone look 3 is a flake-shaped phosphor body 4 (eg made of ceramic) embedded on a transparent, platelet-shaped sapphire substrate 5 rests. The phosphor body 4 can eg with the sapphire substrate 5 be glued. Due to the flat surface of the phosphor body 4 results in a reliable positioning and very good heat dissipation of the phosphor body 4 to the sapphire substrate 5 , The sapphire substrate 5 is held by means of a metallic holder, which here consists of two separate metal legs 6 consists. The metal legs 6 may for example consist of copper or aluminum. The metal legs 6 are solid with the sapphire substrate 5 connected.

While the sapphire substrate 5 also completely in the silicone material of the silicone look 3 is embedded, this is for the metal legs 6 only partially the case. The metal legs 6 so they stand out of the silicone look 3 out. This facilitates heat removal from the sapphire substrate 5 and thus also of the phosphor body 4 especially if the metal legs 6 connected to a heat sink or to a heat sink (not shown). Also, the metal legs can 6 easy handling and precise positioning of the silicone look 3 serve.

The silicone look 3 is an injection molded body, leaving the phosphor body 4 is shed in the silicone material. This can be done, for example, by inserting the phosphor body 4 , the sapphire substrate 5 and (at least in part) the metal legs 6 be achieved in an injection mold.

The silicone look 3 has a light entry surface 7 for the primary light, which may be curved for beam shaping.

It can for example parallelize the incident primary light P.

The silicone look 3 points between the light entry surface 7 and the phosphor body 4 a - open or closed - cavity 8th or recess on. The cavity 8th may be jet-forming and thus serve as a primary optic. The cavity 8th may, for example - as indicated - the passing primary light P on the phosphor body 4 focus. The cavity 8th is non-spherical in shape and has a first interface in the light propagation direction of the primary light P. 9 and following a second interface 10 on.

The shape of the surfaces 7 . 9 and 10 is basically not restricted and can also be a non- have jet-forming shape. For example, the surfaces 7 and 9 represent in another view, a classic aspherical lens, but as an alternative, other conventional forms are represented (eg cylindrical lenses, part cylinder lenses, etc.). It is also possible to use the surfaces 7 and 9 designed as a freeform lens.

It is basically possible with the surfaces 7 and 9 only one or mainly a main direction of the primary light P and the laser beam to form and with the second interface 10 to influence the other main direction.

That through the surfaces 7 and 9 shaped primary light P passes through the cavity 8th and is from the second interface 10 of the cavity 8th back into the silicone material of the silicone look 3 broken into it.

The converted secondary light S and, in the case of a partial conversion, unconverted portions of the primary light P are produced by means of a lateral lateral surface 11 and a front light exit surface 12 the silicone look 3 to a light distribution of a Nutzlichts P, S shaped. The lateral surface 11 can be executed as TIR (Total Internal Reflection) surface or mirrored. It may or may not be rotationally symmetric. The lateral surface 11 can be used to parallelize the useful light P, S, or alternatively can be designed to image the light distribution. The light exit surface 12 may be flat or curved (eg concave or convex). It can be designed as a multifaceted freeform.

2 shows a lighting device 21 similar to the lighting device 1 is trained. The laser diode 2 is not shown, but may be present.

The lighting device 21 additionally has a second cavity 22 on, located between the phosphor body 4 and the light exit surface 12 the silicone look 23 located. The second cavity 22 creates additional optical surfaces to shape the light distribution of the useful light P, S.

The cavity 22 can have one or more edge slots 24 have, in a more pronounced undercut in the injection mold, as indicated for example by the dashed line L, are helpful for demolding to remove the part of the tool from the cavity which is located there. The interfaces of the cavity 22 are freely formable and may be formed, for example, concave, convex or multifaceted etc.

3 shows the lighting device 21 with the laser diode 2 , Here are the metal legs 6 directly on the laser diode 2 attached, eg by welding, gluing, clamping, etc. This allows the silicone look 23 opposite the laser diode 2 be very small. In addition, so can the distance of the laser diode 2 to the silicone look 23 set very precisely in a simple way. An elaborate adjustment can be avoided.

The lighting device 1 can be analog with the laser diode 2 get connected.

4 shows a lighting device 31 similar to the lighting device 1 is trained. The laser diode 2 is not shown, but may be present.

In the lighting device 31 are the phosphor body 4 and the sapphire substrate 5 now in a cavity 32 a silicone look 33 arranged. The phosphor body 4 So here is not in the material of the silicone look 33 embedded. The metal legs 6 protrude through the silicone look 33 and are therefore with the silicone look 33 firmly connected. The cavity 32 may be a closed cavity or an open cavity or an open recess.

5A shows a sectional representation in side view of a phosphor body 4 , a sapphire substrate 5 and a metallic holder, for example 42 a lighting device 41 , 5B shows the components 5A in plan view. The one-piece metal holder 42 is now formed tab-shaped and has front side a flat area 43 with a hole 44 on. From the flat area 43 go one-sided a side wall 45 from the back into a foot area 46 passes. The holder 42 can over the foot area 46 eg at the laser diode 2 (not shown) are attached. The sapphire substrate 5 is so back at the flat area 43 attached (eg glued) that the phosphor body 4 in the hole 44 protrudes. These components are manageable as a common composite.

5C shows a sectional view in side view of a silicone look 47 the lighting device 41 , 5D shows the silicone look 47 as a sectional view in the plane of the recess 48 in plan view. The silicone look 47 has a laterally open recess 48 or cavity in which the flat area 43 the metallic holder 42 with the phosphor body 4 and the sapphire substrate 5 can be introduced. The metallic holder 42 can eg with the silicone optics 47 be glued. The silicone look 47 can be another cavity 49 exhibit. The narrowing in the recess 48 serves to better support the holder 42 , which by means of narrowing in the recess 48 can be clamped.

6A shows in plan view components of a lighting device 51 in a partially finished Status. 6B shows in plan view a section of the lighting device 51 in a ready assembled state.

The lighting device 51 has a ladder-like sheet metal frame 52 with arranged in a row cross struts, of which here the first to fourth metal forms ("cross struts" 52a to 52d ) are shown. The cross struts 52a to 52d go from parallel longitudinal struts 53 from.

At the first, continuous cross strut 52a can a laser diode 2 be attached, as indicated by the associated arrow. This is the first cross strut 52a formed annular in a central portion. The laser diode 2 can be attached to this central section (eg glued, welded or soldered or clamped on it). In particular, the laser diode 2 in a recess or in a hole 56 of the central portion are used to achieve a particularly precise and reliable arrangement. The laser diode 2 So cover the hole 56 , The laser diode 2 can with the first cross strut 52a also be electrically connected, for example, for their grounding.

The second cross strut 52b is not continuous or an interrupted cross strut. The two approaches of the second cross strut 52b can also be called noses. Is the sheet metal frame 52 produced by punching, the noses can also be referred to as punching noses. At the noses of the second cross strut 52b is a first transmitted light optics 54 in the form of a transparent injection-molded body, for example made of silicone, arranged. The second crossbar 52b So here is the first transmitted light optics 54 potted, which allows a particularly precise and reliable positioning.

At the third, continuous cross strut 52c can be a phosphor body 4 with sapphire substrate 5 be attached, as indicated by the associated arrow. This is the third cross strut 52c formed in a central portion rectangular annular. The sapphire substrate 5 can be attached to this central portion (eg glued or clamped), in particular so that the phosphor body 4 in a recess or in a hole 57 of the central section protrudes. The phosphor body 4 So cover the hole 57 ,

At the fourth, interrupted cross strut 52d is a second transmitted light optics 55 in the form of a transparent injection-molded body, for example made of silicone, arranged. The noses of the fourth crossbar 52d are with the second transmitted light optics 55 been shed. While the transmitted light optics 54 can also be regarded as primary optics, the transmitted light optics 55 also be regarded as secondary optics.

To that of the laser diode 2 emitted primary light P through the first transmitted light optics 54 on the phosphor body 4 to be able to judge, become the first cross strut 52a and the third crossbar 52c each rotated by 90 ° from the sheet plane (which here corresponds to the image plane). This is for the first cross brace 52a with the associated laser diode 2 in 6B shown.

Although the invention has been further illustrated and described in detail by the illustrated embodiments, the invention is not so limited and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention.

Thus, a lighting device according to the type of lighting device 51 be equipped with multiple light sources and / or multiple phosphor bodies - each of a different kind - be equipped. In particular, each of the light sources, for example, can irradiate its own phosphor body. Such a lighting device is not limited to the use of exactly two optics. The ladder-like sheet metal frame can basically be made arbitrarily long and be equipped with any number of transmitted light optics and other optics (eg mirrors, screens, etc.). In particular, the transmitted-light optics and, if appropriate, other optics can be arranged and designed so that not every optic is operated by each light source. Also, a phosphor body does not necessarily have to be deposited on a sapphire substrate. Other substrates or even no substrate are also possible depending on the type of phosphor body (eg ceramic or phosphor embedded in glass, etc.).

Also, a lighting device in the manner of the lighting device 51 be formed such that at least one transmitted light optics 54 and or 55 is not arranged on a separate cross brace, but on the laser diode 2 or on the phosphor body 4 is provided as a Vergussteil. In other words, the laser diode 2 and / or the phosphor body 4 at least partially in the associated transmitted light optics 54 respectively. 55 to be shed. As a result, cross struts can be saved. This in turn advantageously reduces assembly and / or adjustment tolerances. For encapsulation of the laser diode 2 and / or the phosphor body 4 For example, the sheet metal frame 52 and the phosphor body 4 be inserted into an injection mold and the transmitted light optics 55 to the phosphor body 4 be sprayed. On the crossbar 52d for the phosphor body 4 can then be dispensed with. In a further development, the laser diode can also be used 2 and the phosphor body 4 be shed together, eg by the material of a transmitted light optics 54 and or 55 , Thus, the number of cross struts can be further reduced, possibly to only one cross strut.

Generally, the sheet metal frame may have any shape with at least one transverse strut.

Generally, "on", "an", etc. may be taken to mean a singular or a plurality, in particular in the sense of "at least one" or "one or more" etc., unless this is explicitly excluded, e.g. by the expression "exactly one", etc.

Also, a number can include both exactly the specified number and a usual tolerance range, as long as this is not explicitly excluded.

LIST OF REFERENCE NUMBERS

1

 lighting device

2

 laser diode

3

 silicon optics

4

 Luminescent body

5

 Saphirsubtrat

6

 metal leg

7

 Light entry surface

8th

 cavity

 9

 First interface

10

 Second interface

11

 lateral surface

12

 Light-emitting surface

21

 lighting device

22

 cavity

23

 silicon optics

24

 slot

31

 lighting device

32

 cavity

33

 silicon optics

41

 lighting device

42

 bracket

43

 Flat area

44

 hole

45

 Side wall

46

 footer

47

 silicon optics

48

 recess

49

 cavity

51

 lighting device

52

 sheet metal frame

52a

 First cross brace

52b

 Second cross strut

52c

 Third cross strut

52d

 Fourth crossbar

53

 longitudinal strut

54

 First transmitted light optics

55

 Second transmitted light optics

56

 hole

57

 hole

P

 primary light

S

 secondary light

Claims (16)

Lighting device ( 1 ; 21 ; 31 ; 41 ), comprising - a light source ( 2 ), in particular semiconductor light source, for generating primary light (P), - one of the light source ( 2 ) spaced transmitted light optics ( 3 ; 23 ; 33 ; 47 ) and - a phosphor body ( 4 ) for at least partially converting the primary light (P) into secondary light (S), wherein - the phosphor body ( 4 ) in transmitted-light optics ( 3 ; 23 ; 33 ; 47 ; 54 . 55 ) is housed. Lighting device ( 1 ; 21 ) according to claim 1, wherein the phosphor body ( 4 ) is cast in the transmitted light optics. Lighting device ( 31 ; 41 ) according to one of the preceding claims, wherein the phosphor body ( 4 ) in a recess ( 32 ; 48 ) of the transmitted-light optics ( 33 ; 47 ) is arranged. Lighting device ( 1 ; 21 ; 31 ; 41 ) according to one of the preceding claims, wherein the transmitted-light optical system ( 3 ; 23 ; 33 ; 47 ) at least one of the phosphor body ( 4 ) irradiable, in particular jet-forming, cavity ( 8th ; 8th . 22 ; 32 ; 49 ) having. Lighting device ( 1 ; 21 ; 31 ; 41 ) according to one of the preceding claims, wherein the cavity is at least partially spherical and / or non-spherical ( 8th ; 8th . 22 ; 32 ; 49 ) is shaped. Lighting device ( 1 ; 21 ) according to one of the preceding claims, wherein at least one cavity ( 8th ) between a light entry surface ( 7 ) for the primary light and the phosphor body ( 4 ) is located. Lighting device ( 21 ; 41 ) according to one of the preceding claims, wherein at least one cavity ( 22 ; 49 ) between the phosphor body ( 4 ) and a light exit surface ( 12 ) for the phosphor body ( 4 ) radiated useful light (P, S) is located. Lighting device ( 1 ; 21 ; 31 ; 41 ) according to one of the preceding claims, wherein the transmitted-light optical system ( 3 ; 23 ; 33 ; 47 ) consists of silicone. Lighting device ( 1 ; 21 ; 31 ; 41 ) according to one of the preceding claims, wherein the Phosphor body ( 4 ) by means of a holder ( 6 ; 42 ) and the holder ( 6 ; 42 ) partially in the transmitted light optics ( 3 ; 23 ; 33 ; 47 ) is housed. Lighting device ( 1 ; 21 ; 31 ; 41 ) according to claim 9, wherein the phosphor body ( 4 ) on a particularly transparent substrate, in particular a sapphire substrate ( 5 ), which rests against the holder ( 6 ; 42 ) is held. Lighting device ( 1 ; 21 ; 31 ; 41 ) according to one of claims 9 or 10, wherein the light source ( 2 ) with the bracket ( 6 ; 42 ) connected is. Lighting device ( 51 ), comprising a ladder-like sheet metal frame ( 52 ) arranged in a row first to third cross struts ( 52a - 52c ), wherein - at the first cross strut ( 52a ) a light source ( 2 ) is mounted for generating primary light (P), which in the direction of the second transverse strut ( 52b ) and the third transverse strut ( 52c ) is alignable, - on the second transverse strut or on the third cross strut ( 52c ) a phosphor body ( 4 ) for at least partially converting the primary light (P) into secondary light (S), - at the third transverse strut or at the second transverse strut ( 52b ) a transmitted light optics ( 54 ) is attached. Lighting device ( 51 ) according to claim 12, wherein the first transverse strut ( 52a ) and that cross strut ( 52c ), at which the phosphor body ( 4 ) is arranged, are rotated by 90 ° from a plane sheet. Lighting device ( 51 ) according to one of claims 12 to 13, wherein the first transverse strut ( 52a ) and that cross strut ( 52c ) at which the light source ( 2 ) or the phosphor body ( 4 ) are arranged, a respective recess ( 56 . 57 ) caused by the light source ( 2 ) or the phosphor body ( 4 ) is covered. Lighting device ( 51 ) according to one of claims 12 to 14, wherein the transmitted-light optical system ( 54 . 55 ) on the cross strut ( 52b . 52d ) is shed.  Headlamp with a lighting device according to claim 1 or 12

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