Lighting device for automobile headlight

Abstract

To provide an improved lighting device for an automobile headlamp. A lighting device for a vehicle headlamp. The lighting device (10) has at least one projection device (100), which is disposed on a support frame (50) of the lighting device (10). The at least one projection device (100) includes at least one micro-optical system array (200) having a plurality of micro-optical systems (210) arranged in a matrix on a plane perpendicular to the main radiation direction (X) of the projection device (100), at least one substrate layer (300) on which the at least one micro-optical system array (200) is arranged, wherein the at least one micro-optical system array (200) is arranged in an optically active portion (310) of the substrate layer (300), and the optically active portion (310) is at least partially translucent; and at least one light source (400) configured to emit a light beam, wherein the light beam enters the optically active portion (310) of the substrate layer (300), passes through the at least one micro-optical system array (200), and is emitted as a light distribution in front of the illumination device (10). The substrate layer (300) includes an edge portion (320) that extends around and partially over the planar extent of the optically active portion (310), and is at least partially bonded to the support frame (50) by adhesive (500).

Description

[Technical field]

[0001] The present invention relates to a lighting device for a motor vehicle headlight, the lighting device comprising at least Two a projection device disposed on a support frame of the illumination device; Two The projection device is at least one micro-optics array having a plurality of micro-optics arranged in a matrix in a plane perpendicular to the main emission direction of the projection device, at least one substrate layer on which the at least one micro-optic array is disposed, the at least one micro-optic array being disposed in an optically active portion of the substrate layer, the optically active portion being at least partially optically transparent; at least one light source configured to emit a light beam, the light beam being incident on the optically active portion of the substrate layer, passing through the at least one micro-optic array, and exiting as a light distribution in front of the illumination device; The present invention relates to a lighting device, including: [Background technology]

[0002] The light distribution is generated by the lighting device or at least one of its projection devices, which must be mounted on the support frame of the lighting device and then adjusted, or, in the case of several projection devices, which must also be adjusted or oriented relative to one another. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] EP 3312501 A1 [Patent Document 2] EP 3492804 A1 [Patent Document 3] EP 2827049 A2 Summary of the Invention [Problem to be solved by the invention]

[0004] This is usually done for each projection system by means of a three-point support and an adjustment screw. For this purpose, several individual parts have to be assembled and adjusted to one another. This inevitably results in high component costs, high assembly costs and an increase in the used construction space. Furthermore, it is difficult or not possible at all to automate the adjustment process or the assembly of such projection systems.

[0005] SUMMARY OF THE DISCLOSURE It is an object of the present invention to provide an improved lighting device. [Means for solving the problem]

[0006] This issue is According to one aspect of the present invention, there is provided a lighting device for a motor vehicle headlight, comprising: The illumination device has at least two projection devices, the projection devices being disposed on a support frame of the illumination device; The at least two projection devices at least one micro-optics array having a plurality of micro-optics arranged in a matrix in a plane perpendicular to the main emission direction of the projection device, at least one substrate layer on which the at least one micro-optic array is disposed, the at least one micro-optic array being disposed in an optically active portion of the substrate layer, the optically active portion being at least partially optically transparent; at least one light source configured to emit a light beam, the light beam being incident on the optically active portion of the substrate layer, passing through the at least one micro-optic array, and exiting as a light distribution in front of the illumination device; containing, The problem is solved by the fact that the substrate layer includes an edge portion extending around the optically active portion and partially extending in the form of a planar extent of the optically active portion, the edge portion being at least partially bonded to the support frame by means of an adhesive, the support frame including an opening assigned to each projection device, the opening having an edge region extending around the same, the edge region corresponding to the edge portion of the at least one substrate layer, the edge portion being bondable to the edge region of the opening by means of an adhesive. (Form 1). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] Preferred embodiments of the present invention are described below. (Mode 1) See one aspect of the present invention above. (Feature 2) In the lighting device of feature 1, Preferably, said at least one substrate layer is made of glass. (Feature 3) In the lighting device of feature 1 or 2, The at least one micro-optics array is preferably fabricated in silicon. (Feature 4) In any one of the lighting devices of features 1 to 3, The at least one micro-optical system array is preferably formed from a plurality of micro-optical systems that are integrally configured. (Feature 5) In the lighting device according to any one of features 1 to 4, Preferably, the edge portion of the substrate layer is not optically effective. (Feature 6) In any one of the lighting devices of features 1 to 5, The edge portion of the substrate layer is preferably arranged to be opaque. (Feature 7) In the lighting device of any one of Features 1 to 6, The extent of the opening preferably corresponds at least to the extent of the optically active portion of the substrate layer. (Feature 8) In any one of the lighting devices of features 1 to 7, Preferably, said edge portion extends all around said optically active portion of said substrate layer. (Feature 9) In any one of the lighting devices of features 1 to 8, The edge portion is Write With respect to the main radiation direction of the shadow device Within the plane of the perpendicular surface It is preferred that the light emitting element extends from the optically active portion of the substrate layer in a direction perpendicular to the optical axis.

[0008] In the context of the present invention, the concept "optically transparent" or "translucent" material is to be understood as a material having a transmittance T greater than 0.88, preferably greater than 0.999, where the given transmittance preferably relates to light in the wavelength range from approximately 400 nm to approximately 700 nm (i.e. visible light).

[0009] Preferably, the at least one substrate layer and the at least one micro-optical system array extend parallel to each other and are arranged perpendicular to the optical axis or main radiation direction of the projection device, the optical axis of the projection device preferably coinciding with the main radiation direction of the motor vehicle headlight when the projection device is technically properly integrated into the motor vehicle headlight.

[0010] When assembling or mounting at least one projection device, it is possible to at least partially apply adhesive to the edge portion of the support frame and / or the substrate layer. The micro-optical array, which is arranged on the substrate layer, is then positioned in front of the support frame (downstream), while the light source is switched on and illuminates the micro-optical array. The light distribution thus already generated is measured (evaluated), and the micro-optical array is adjusted and finally aligned on the support frame. The adhesive is then cured. This process can be repeated for further (other) projection devices of the illumination device.

[0011] By constructing the lighting device according to the invention, the space required, for example in a motor vehicle headlamp, can be significantly reduced.

[0012] At least one of the substrate layers may be made of glass.

[0013] With regard to stability and thermal resistance, the use of at least one substrate layer made of glass can be particularly advantageous. A glass substrate layer increases the stability and robustness (strength) of the projection device, thus allowing for example automated manufacturing processes. Furthermore, a glass substrate layer provides high transparency and also increases the chemical and thermal resistance (stability) of the projection device.

[0014] The substrate layer may have a thickness of 0.5 to 4 mm, preferably 1.1 mm.

[0015] At least one micro-optic array can be fabricated in silicon.

[0016] By using transparent silicon, higher operating temperatures and therefore higher light densities can be achieved, and furthermore, by using transparent silicon, the robustness of the projection device is increased, with respect to a durable bond between the micro-optics array and the substrate layer or a durable attachment of the at least one micro-optics array to the at least one substrate layer.

[0017] The substrate layer is therefore preferably formed according to the invention from a material that has good optical transparency (translucency) and is sufficiently form-stable, which in the context of the invention means that the substrate layer carries the micro-optical system array made of (soft) silicon and does not change its shape during the formation of the micro-optical system array on the first side of the substrate layer and during the use of the projection device in the vehicle headlamp, i.e. is resistant to heat etc. in terms of shape.

[0018] At least one micro-optic array can be formed from a plurality of integrated micro-optics.

[0019] The edge portions of the substrate layer may not be optically effective.

[0020] The edge portions of the substrate layer may be configured to be opaque.

[0021] The illumination device may comprise at least two projection devices.

[0022] The support frame may include an opening allocated to at least one projection device, the opening having an edge region extending around its periphery, the edge region corresponding to an edge portion of at least one substrate layer, the edge portion being bondable to the edge region of the opening by adhesive.

[0023] The extent of the aperture may correspond at least to the extent of the optically active portion of the substrate layer.

[0024] The edge portion may extend all the way around the optically active portion of the substrate layer.

[0025] The edge portion may extend from the optically active portion of the substrate layer in a radial direction relative to a main emission direction of the at least one projection device.

[0026] In the following, the invention is explained in more detail using exemplary drawings. It should be noted that the reference numerals in the drawings used in the claims are intended solely to aid in understanding the invention and are not intended to limit the invention to the illustrated embodiments. [Brief description of the drawings]

[0027] [Figure 1] 1 is a cross-sectional view of an example illumination device having two projection devices, each having a micro-optics array on a substrate and disposed on the illumination device support frame. [Diagram 2] 1 is a cross-sectional view of an example micro-optic array on a substrate layer, the micro-optic array being disposed in an optically active portion of the substrate layer, the substrate layer further having an edge portion extending around and away from the optically active portion. [Diagram 3] 3 is a top view of an example micro-optic array on the substrate layer of FIG. 2. EXAMPLES

[0028] 1 shows an exemplary lighting device 10 for an automobile headlamp. In the illustrated example, the lighting device 10 has two projection devices 100, which are disposed on a support frame 50 of the lighting device 10.

[0029] Each of the projection devices 100 comprises a micro-optics array 200 which comprises a number of micro-optics 210 arranged in a matrix on a plane perpendicular to the main radiation direction X of the projection device 100 .

[0030] The micro-optic arrays 200 are disposed on a substrate layer 300 of a respective projection device 100. The micro-optic arrays 200 are disposed on an optically active portion 310 of the respective substrate layer 300. The optically active portion 310 is at least partially optically transmissive.

[0031] Furthermore, a projection device 100 comprises a light source 400 configured to emit a light beam that is incident on the optically active surface 310 of the substrate layer 300, passes through the micro-optics array 200 and is emitted as a light distribution in front of the illumination device 10.

[0032] Furthermore, each substrate layer 300 comprises an edge portion 320 which extends around the entire periphery of the optically active portion 310 and in the planar extent of the optically active portion 310. The edge portion 320 is at least partially bonded (or fixed) to the support frame 50 by means of an adhesive 500. The edge portion 320 therefore extends or protrudes from the optically active portion 310 of the substrate layer 300 in a radial direction relative to the main radiation direction X of the respective projection device 100.

[0033] 1 , the support frame 50 has an opening 51 assigned to each projection device 100, the opening 51 having a surrounding extending edge region 52 which corresponds to an edge portion 320 of the respective substrate layer 300, the edge portion 320 being bondable (fixed) to the edge region 52 of the opening 51 by means of an adhesive 500. In this case, the extent (or size) of the opening 51 corresponds to the extent (or size) of the optically active portion 310 of the substrate layer 300.

[0034] 2 shows an exemplary substrate layer 300 having an optically active portion 310 and an edge portion 320 extending from the optically active portion 310 on which the micro-optic array 200 is disposed or coupled. The edge portion 320 is generally not optically active and in this case may be configured to be opaque, i.e. the substrate layer 300 may be manufactured from two different materials or in at least two manufacturing steps. The substrate layer may be manufactured from glass in the illustrated example and the micro-optic array 200 is manufactured from silicon.

[0035] Figure 3 illustrates in plan view an example substrate layer 300 having the micro-optic array 200 of Figure 2. In the illustrated example, the micro-optic array 200 is formed from a number of micro-optics 210 arranged integrally.

[0036] Possible aspects of the present invention are listed below. [Appendix 1] A lighting device for automobile headlights. The illumination device comprises at least one projection device; the projection device is disposed on a support frame of the illumination device; The at least one projection device at least one micro-optics array having a plurality of micro-optics arranged in a matrix in a plane perpendicular to the main emission direction of the projection device, at least one substrate layer on which the at least one micro-optic array is disposed, the at least one micro-optic array being disposed in an optically active portion of the substrate layer, the optically active portion being at least partially optically transparent; at least one light source configured to emit a light beam, the light beam being incident on the optically active portion of the substrate layer, passing through the at least one micro-optic array, and exiting as a light distribution in front of the illumination device; Contains; the substrate layer including an edge portion extending around and partially across the planar extent of the optically active portion; the edge portion is at least partially bonded to the support frame by means of an adhesive; [Supplementary Note 2] In the above lighting device, the at least one substrate layer is made of glass. [Supplementary Note 3] In the above illumination device, the at least one micro-optical system array is fabricated from silicon. [Supplementary Note 4] In the above illumination device, the at least one micro-optical system array is formed from a plurality of micro-optical systems that are integrally configured. [Supplementary Note 5] In the above lighting device, the edge portion of the substrate layer is not optically effective. [Supplementary Note 6] In the above-mentioned lighting device, the edge portion of the substrate layer is configured to be opaque. [Supplementary Note 7] In the above-mentioned lighting device, the lighting device has at least two projection devices. [Appendix 8] In the above lighting device, the support frame includes an opening allocated to the at least one projection device; the opening having a circumferentially extending edge region; the edge region corresponds to the edge portion of the at least one substrate layer; The edge portion is bondable to the edge region of the opening by an adhesive. [Supplementary Note 9] In the above lighting device, the extent of the opening corresponds at least to the extent of the optically effective portion of the substrate layer. [Supplementary Note 10] In the above lighting device, the edge portion extends around the entire periphery of the optically effective portion of the substrate layer. [Supplementary Note 11] In the above illumination device, the edge portion extends from the optically active portion of the substrate layer in a radial direction relative to the main emission direction of the at least one projection device. [Explanation of symbols]

[0037] 10. Lighting Equipment 50 Support Frame 51 Opening 52 (Opening) Edge Area 100 Projection device 200 Micro-optical array 210 Micro-Optical Systems 300 Board Layers 310 Optically active part 320 Edge 400 light sources 500 Adhesive X Main radiation direction

Claims

1. A lighting device for a headlamp of an automobile, comprising: The lighting device (10) has at least two projection devices (100), the projection devices (100) being arranged on a support frame (50) of the lighting device (10); The at least two projection devices (100) include: at least one micro-optics array (200) having a plurality of micro-optics (210) arranged in a matrix in a plane perpendicular to the main radiation direction (X) of the projection device (100); at least one substrate layer (300) on which the at least one micro-optic array (200) is disposed, the at least one micro-optic array (200) being disposed in an optically active portion (310) of the substrate layer (300), the optically active portion (310) being at least partially optically transparent; at least one light source (400) configured to emit a light beam, said light beam being incident on said optically active portion (310) of said substrate layer (300), passing through said at least one micro-optic array (200) and emerging as a light distribution in front of said illumination device (10); containing, the substrate layer (300) including an edge portion (320) surrounding and extending around the optically active portion (310) and extending partially over a planar extent of the optically active portion (310); said edge portion (320) being at least partially bonded to said support frame (50) by means of an adhesive (500); said support frame (50) including an opening (51) assigned to each projection device (100); the opening (51) having a circumferentially extending edge region (52); the edge region (52) corresponding to the edge portion (320) of the at least one substrate layer (300); said edge portion (320) being bondable to said edge region (52) of said opening (51) by means of an adhesive (500); A lighting device comprising:

2. 2. The lighting device according to claim 1, said at least one substrate layer (300) being made of glass; A lighting device comprising:

3. 3. The lighting device according to claim 1, said at least one micro-optics array (200) being fabricated in silicon; A lighting device comprising:

4. The lighting device according to any one of claims 1 to 3, The at least one micro-optical system array (200) is formed from a plurality of integrally configured micro-optical systems (210). A lighting device comprising:

5. The lighting device according to any one of claims 1 to 4, the edge portion (320) of the substrate layer (300) being optically ineffective; A lighting device comprising:

6. The lighting device according to any one of claims 1 to 5, The edge portion (320) of the substrate layer (300) is configured to be opaque. A lighting device comprising:

7. The lighting device according to any one of claims 1 to 6, The extent of the opening (51) corresponds at least to the extent of the optically active portion (310) of the substrate layer (300). A lighting device comprising:

8. The lighting device according to any one of claims 1 to 7, The edge portion (320) extends around the entire periphery of the optically active portion (310) of the substrate layer (300). A lighting device comprising:

9. The lighting device according to any one of claims 1 to 8, the edge portion (320) extends from the optically active portion (310) of the substrate layer (300) in an in-plane direction perpendicular to the main radiation direction (X) of the projection device (100); A lighting device comprising:

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