Lighting device for a motor vehicle

Abstract

The invention relates to a lighting device for a motor vehicle, in particular a high-resolution headlight, comprising at least:-an imaging component having an active surface on which light-emitting diodes or laser diodes are arranged in a matrix for the targeted generation of pixels of a light distribution; the invention relates to a projection optical device, which is suitable and provided for projecting light emitted by an active surface into an exterior of a motor vehicle during operation of the lighting device, said projection optical device comprising at least a first lens, a second lens and a third lens, light emitted by the effective surface first penetrates through the third lens, then penetrates through the second lens and then penetrates through the first lens; a lens holder adapted and arranged for holding at least a third lens; the lighting device is characterized in that the lighting device comprises a holding device, and the holding device is suitable and arranged to be used for holding the first lens and the second lens.

Description

Technical Field

[0001] The present invention relates to a lighting device for a motor vehicle, in particular a high-resolution headlamp, the lighting device comprising: an imaging component having an effective surface, on which light-emitting diodes or laser diodes are arranged in a matrix-like manner for targeted generation of pixels of a light distribution; a projection optical device, wherein the projection optical device is suitable and configured to project light emitted by the effective surface into an exterior space of the motor vehicle during operation of the lighting device, wherein the projection optical device comprises at least a first, a second and a third lens, wherein the light emitted by the effective surface first penetrates the third lens, then the second lens and then the first lens; and a lens holder, wherein the lens holder is suitable and configured to hold at least the third lens, and the present invention relates to a motor vehicle having such a lighting device. Background Art

[0002] Lighting devices of the aforementioned type are known from the prior art.

[0003] In known lighting devices, the lens holder is usually suitable and designed not only for holding the third lens, but also for holding the first lens and the second lens. This is only possible without problems if the size of the lenses is decreasing, i.e. the first lens is the largest lens, the second lens has an intermediate size and the third lens is the smallest lens. This requirement cannot always be met both structurally and from a design point of view. Summary of the invention

[0004] The present invention starts from this point.

[0005] The object of the present invention is to specify a lighting device in which there are improved possibilities for fastening lenses.

[0006] The object is achieved by a lighting device for a motor vehicle, in particular a high-resolution headlight, comprising at least:

[0007] An imaging component having an active surface, on which light-emitting diodes or laser diodes are arranged in a matrix for the purpose of generating individual pixels of a light distribution;

[0008] a projection optical system, wherein the projection optical system is suitable and arranged for projecting light emitted by the active surface into an exterior area of ​​the motor vehicle during operation of the lighting device, wherein the projection optical system comprises at least a first, a second and a third lens, wherein the light emitted by the active surface first passes through the third lens, then through the second lens and then through the first lens;

[0009] - a lens holder, wherein the lens holder is adapted and arranged to hold at least a third lens;

[0010] Therein, the lighting device comprises a holding device, wherein the holding device is suitable and configured to hold the first lens and the second lens.

[0011] The retaining device is suitable for retaining lenses of different geometries. Depending on the lens, the first lens and the second lens can be fastened to the retaining device in different types. In addition, threaded connections, clamping connections, latching connections, adhesive connections, welding or laser welding connections are conceivable here. The retaining device can be implemented in such a way that the retaining device is adapted to the first lens and the second lens. This has the advantage that the lenses can be selected independently of the retaining device. In particular, the first lens is usually visible in the lighting device and is therefore also selected from an optical point of view in terms of shape and size. The proposed retaining device provides the advantage that the shape and size of the first and second lenses are not limited by the fastening within the lighting device.

[0012] It may be provided that the imaging member is a solid-state LED array, in particular a SSL-HD module (Solid State Lighting High Resolution module).

[0013] Furthermore, it can be provided that the holding means is designed in one piece and / or in a cup-shaped manner. The holding means can have a hole in the middle, which enables the light emitted by the active area to pass through.

[0014] There is the possibility that the retaining device is arranged between the first lens and the second lens. The arrangement of the retaining device between the first and second lenses offers the advantage that the first lens can be retained on the side of the retaining device facing away from the imaging component and the second lens can be retained on the side of the retaining device facing the imaging component. In particular, it can be provided that the second lens can be arranged within a cup-shaped retaining device. The retention of the first lens and the second lens on different sides of the retaining device offers the possibility of designing for retention of the respective lenses on the retaining device without structural limitations.

[0015] In addition, there is the possibility that the holding device has a first element, preferably a first gap, on the side facing away from the imaging member for fastening the first lens, and the holding device has a second element, preferably a second gap, on the side facing the imaging member for fastening the second lens. The first element and the second element can be shaped in such a way that a clamping, locking, plug-in, threaded or welded connection can be achieved. The desired form of the connection is first determined by the lens used. The first element and the second element of the holding device can be adapted to the lens.

[0016] Preferably, it can be provided that the holding device is configured as an aperture diaphragm, wherein the aperture diaphragm is suitable and arranged to limit the light projected by the projection optical device into the exterior space of the motor vehicle. In addition to the advantages provided by the holding device mentioned above, since the holding device is suitable and arranged to hold the first lens and the second lens, another advantage is that the holding device can be configured as an aperture diaphragm. This enables the integration of different task functions into the holding device. Therefore, components within the lighting device can be saved and costs and assembly time can be reduced. Advantageously, the holding device is configured as an aperture diaphragm so that the desired light distribution can be achieved. Through the structural construction of the lighting device, corners or edges are generated within the lighting device, and the light emitted by the effective surface can be refracted or reflected on the corners or edges. This may cause the light image projected in the exterior space of the lighting device to be defective. The aperture diaphragm is used to achieve that only the following light is projected into the exterior space of the lighting device, which light is necessary for the desired light distribution.

[0017] It can be provided that the third lens is suitable and is designed to generate light having approximately parallel beam paths, wherein the third lens is preferably designed as a collimator.

[0018] It can be provided that the holding device has a positioning element for fastening the aperture. The aperture can be mounted in front of the first lens in order to provide an observer of the lighting device with a visually attractive appearance. The lighting device is used in a motor vehicle in the installed state, and the motor vehicle is also conceived from an optical point of view as a whole. Therefore, it is required that the lighting device can also be designed from an optical point of view. In addition, the aperture can be used to prevent the observer from seeing the technical internal structure of the lighting device. For this purpose, it is necessary that the gap between the aperture and the first lens is as small as possible. The positioning element ensures that the aperture can be mounted on the holding device with an accurate fit and that the gap between the aperture and the first lens is minimized.

[0019] Furthermore, it can be provided that a cooling body is arranged on the imaging element. The cooling body is required to dissipate the heat generated by the imaging element.

[0020] There is the possibility that the retaining means is designed as a plastic injection molded part, preferably a plastic injection molded part made of a thermosetting plastic or a thermoplastic. Thermosetting plastics and thermoplastics offer different advantages when used. When using a thermosetting plastic for the retaining means, the advantage is achieved that the retaining means is low in deformation and has only a small amount of expansion over the entire temperature range. Deformation or expansion is undesirable because it would lead to a change in the position of the lens within the lighting device. A change in the position of any individual lens may in turn lead to the light distribution to be generated being projected differently from the desired environment of the motor vehicle, for example on the road surface.

[0021] The motor vehicle comprises at least one lighting device according to the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The following describes other features and advantages of various embodiments of the present invention with reference to the accompanying drawings. Here, the same reference numerals are used for the same or similar parts and for parts with the same or similar functions.

[0023] In the figure:

[0024] Figure 1 An exploded view showing a lighting device according to the present invention,

[0025] Figure 2 showing a perspective view of the retaining device from the side facing away from the imaging member,

[0026] Figure 3 showing a perspective view of the holding device from the side facing the imaging member,

[0027] Figure 4 showing a view of the holding device from the side facing away from the imaging member,

[0028] Figure 5 showing a view of the holding device from the side facing the imaging member,

[0029] Figure 6 A side view of the holding device is shown. DETAILED DESCRIPTION

[0030] Figure 1 An exploded view of a lighting device 1 according to the present invention is shown.

[0031] The lighting device 1 comprises an imaging member 2 having an active surface, a projection optical device 3 , a lens holder 7 , a holding device 8 and a cooling body 12 .

[0032] Light emitting diodes or laser diodes are arranged in a matrix on the effective surface of the imaging member 2 for generating pixels of light distribution in a targeted manner. The projection optical device 3 is suitable and arranged to project the light emitted by the effective surface into the exterior space of the motor vehicle during the operation of the lighting device 1. The projection optical device 3 includes a first lens 4, a second lens 5 and a third lens 6, wherein the light emitted by the effective surface first penetrates the third lens 6, then penetrates the second lens 5 and then penetrates the first lens 4.

[0033] The third lens 6 is mounted on the lens holder 7 and is fastened to the lens holder 7 via a fastening device 14 .

[0034] The holding means 8 is suitable and provided for holding the first lens 4 and the second lens 5. The holding means 8 is designed in one piece and in a cup-shaped manner and is arranged between the first lens 4 and the second lens 5.

[0035] The cooling body 12 is disposed on the imaging member 2 to conduct heat away from the imaging member 2 .

[0036] exist Figure 1 The construction of the lighting device 1 can be seen in FIG. 1 . The imaging component 2 is arranged on the cooling body 12 . Subsequently, the lens holder 7 is connected, which holds the third lens 6 , which is fastened to the lens holder 7 by means of a fastening device 14 .

[0037] The second lens 5 can be fastened to a holding device 8, which is arranged between the first lens 4 and the second lens 5. Figure 1 The aperture is formed in Figure 1 Not shown.

[0038] Figures 2 to 6 The holding device 8 is shown from different positions. Figure 2 and 4 A view of the retaining device 8 from the side facing away from the imaging member 2 is shown. Figure 2 and 4 In particular, the first element 9 for fastening the first lens 4 and the positioning element 13 for fastening the aperture (not shown in more detail) can be seen. The first element 13 is designed as a recess into which a corresponding filling element of the first lens 4 can be introduced. The first lens 4 can be used in Figure 1 The elastic element 15 shown in FIG. 1 is locked on the retaining means 8 .

[0039] Figure 3 and 5 A view of the holding device 8 from the side facing the imaging member 2 is shown. Figure 3 and 5 In particular, the second element 10 for fastening the second lens 5 can be seen in FIG. The second element 10 is designed as a recess into which a corresponding filling element of the second lens 5 can be introduced.

[0040] Figure 6 Positioning elements 13 are shown, with which an aperture (not shown in greater detail) can be fastened to the holding means 8 .

[0041] Figures 2 to 5 The holes 16 on the flange of the cup-shaped holding element 8 are shown, by means of which the holding element 8 can be fastened, for example screwed, to the lens holder 8. Figures 2 to 5It can be seen that the holding means 8 is designed as an aperture diaphragm 11 , wherein the aperture diaphragm 11 is suitable and provided for limiting the light projected by the projection optical system 3 into the exterior of the motor vehicle.

[0042] Reference numerals list

[0043] 1 Lighting equipment

[0044] 2 Imaging components

[0045] 3 Projection optics

[0046] 4. First lens

[0047] 5 Second lens

[0048] 6 Third lens

[0049] 7 Lens bracket

[0050] 8. Retention Device

[0051] 9 First Element

[0052] 10 Second Element

[0053] 11 Aperture

[0054] 12 cooling body

[0055] 13 Positioning elements

[0056] 14 Fastening devices

[0057] 15 Elastic element

[0058] 16 holes

Claims

1. A lighting device (1) for a motor vehicle, in particular a high-resolution headlamp, comprising at least: An imaging component (2) having an active surface on which light-emitting diodes or laser diodes are arranged in a matrix for the purpose of generating individual pixels of a light distribution; - a projection optical device (3), wherein the projection optical device is suitable and arranged for projecting light emitted by the active surface into an exterior space of the motor vehicle during operation of the lighting device (1), wherein the projection optical device (3) comprises at least a first lens (4), a second lens (5) and a third lens (6), wherein the light emitted by the active surface first passes through the third lens (6), then through the second lens (5) and then through the first lens (4); - a lens holder (7), wherein the lens holder (7) is suitable and arranged for holding at least the third lens (6); It is characterized in that the lighting device (1) comprises a holding device (8), wherein the holding device (8) is suitable and configured to hold the first lens (4) and the second lens (5).

2. The lighting device (1) according to claim 1, characterized in that The imaging member (2) is a solid-state LED array, in particular a SSL-HD module.

3. The lighting device (1) according to any one of claims 1 to 2, characterized in that The retaining means (8) is designed in one piece and / or in a cup-shaped manner.

4. The lighting device (1) according to any one of claims 1 to 3, characterized in that The holding device (8) is arranged between the first lens (4) and the second lens (5).

5. The lighting device (1) according to any one of claims 1 to 4, characterized in that The holding device (8) has a first element (9), preferably a first recess, on the side facing away from the imaging member (2) for fastening the first lens (4), and the holding device has a second element (10), preferably a second recess, on the side facing the imaging member (2) for fastening the second lens (5).

6. The lighting device (1) according to any one of claims 1 to 5, characterized in that The retaining means (8) is designed as an aperture diaphragm (11), wherein the aperture diaphragm (11) is suitable and provided for limiting the light projected by the projection optical system (3) into the exterior of the motor vehicle.

7. The lighting device (1) according to any one of claims 1 to 6, characterized in that The third lens (6) is suitable and is designed to generate light with approximately parallel beam paths, wherein the third lens (6) is preferably designed as a collimator.

8. The lighting device (1) according to any one of claims 1 to 7, characterized in that A cooling body (12) is arranged on the imaging member (2).

9. The lighting device (1) according to any one of claims 1 to 8, characterized in that The holding device (8) has a positioning element (13) for fastening the aperture.

10. The lighting device (1) according to any one of claims 1 to 9, characterized in that The retaining means (8) is designed as a plastic injection-molded part, preferably a plastic injection-molded part made of a duroplastic or a thermoplastic.

11. A motor vehicle comprising at least one lighting device (1) according to one of claims 1 to 10.

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