Lighting devices for motor vehicle headlights

Abstract

A lighting device (1) for a motor vehicle headlight includes an optoelectronic component (2), a cooling element (3), a circuit board (4), and a stabilizing element (5), wherein the stabilizing element (5) has an opening (5a) for surrounding the optoelectronic component (2), wherein at least two stabilizing arms (7) extend from the edge away from the opening (5a), the stabilizing arms being configured to act on the optoelectronic component (2), wherein the cooling element (3) contacts the optoelectronic component (2) on a side away from the acting side of the optoelectronic component such that the cooling element applies pressure acting on the optoelectronic component (2) in the direction of the acting side of the optoelectronic component (2), wherein the at least two stabilizing arms (7) are elastically constructed and act on the acting side of the optoelectronic component (2) such that the at least two stabilizing arms (7) resist the pressure of the cooling element (3).

Description

Technical Field

[0001] This invention relates to a lighting device for a motor vehicle headlight, comprising:

[0002] - A photoelectronic component, wherein the photoelectronic component has an active side on which a controllable assembly of multiple micromirrors is arranged, the micromirrors being arranged in a two-dimensional matrix having rows and columns and capable of oscillating independently of each other.

[0003] - A cooling element that contacts the optoelectronic component on a side away from the active side to cool the optoelectronic component.

[0004] - A circuit board, which is at least partially disposed between the cooling element and the optoelectronic component and connected to the optoelectronic component for electronic control thereon.

[0005] - A stabilizing element configured to additionally stabilize the position of the optoelectronic components relative to the circuit board.

[0006] - A fixing element configured to connect the stabilizing element and the cooling element to each other.

[0007] The present invention also relates to a motor vehicle headlight having a lighting device. Background Technology

[0008] Lighting devices for motor vehicles with optoelectronic components are known in the prior art. The optoelectronic components are typically fixed to a cooling element or bracket, wherein a resilient element is arranged between the cooling element or bracket and the optoelectronic component to compensate for undesirable movement of the optoelectronic component. Disadvantageously, the resilient element increases the structural complexity of the lighting device, which in turn leads to increased costs. Summary of the Invention

[0009] The purpose of this invention is to mitigate or eliminate the disadvantages of the prior art. Therefore, this invention particularly aims to provide a lighting device in which the fixation of optoelectronic components is improved.

[0010] This objective is achieved by a lighting device having the features of claim 1. Preferred embodiments are described in the dependent claims.

[0011] According to the invention, a stabilizing element has an opening for surrounding a photoelectric component, wherein at least two stabilizing arms extend from the edge away from the opening, the stabilizing arms being configured to act on the photoelectric component at the working side of the photoelectric component in the connected state, wherein, in the connected state, a cooling element contacts the photoelectric component on the side opposite to the working side such that the cooling element applies pressure acting on the photoelectric component in the direction of the working side of the photoelectric component, wherein the at least two stabilizing arms are elastically constructed and act on the working side of the photoelectric component such that the at least two stabilizing arms resist the pressure of the cooling element.

[0012] Advantageously, this eliminates the need for a separate elastic element between the cooling element and the optoelectronic component. Similarly, it eliminates the need for a separate elastic element between the support for the optoelectronic component and the optoelectronic component itself. The elastic effect is achieved by a stabilizing arm, which is part of the stabilizing element. The stabilizing arm and the stabilizing element are essentially the same component. The stabilizing arm can be constructed so elastically as to resist the pressure from the cooling element. Thus, the optoelectronic component can be held stably and elastically at the same time. In this context, the connection state refers to the state in which the stabilizing element is connected to the cooling element by means of a fixing element.

[0013] The stabilizing arm and the opening can be configured to lie in the same plane. This allows for a particularly compact structure of the stabilizing element.

[0014] The opening can be configured to be substantially rectangular. Since optoelectronic components are typically rectangular, it has the advantage that the optoelectronic component can be ideally fitted into or surrounded by the opening. Preferably, the opening has substantially the same length-to-width ratio as the optoelectronic component, wherein the length and width of the opening are at least 1%, preferably 2-5%, and especially 6-10% larger than the length and width of the optoelectronic component.

[0015] The first stabilizing arm can be oriented substantially parallel to a first side of a substantially rectangular opening, and the second stabilizing arm can be oriented substantially parallel to a second side of the substantially rectangular opening. Each stabilizing arm can have a first segment and a second segment connected thereto, the first segment extending orthogonally, for example, away from a corresponding side of the opening, and the second segment extending parallel to such a side of the opening from which the first segment extends. Preferably, the first segment is shorter than the second segment. The stabilizing arms are preferably designed substantially L-shaped, wherein the shorter L-legs extend orthogonally away from the side of the opening, and the longer L-legs extend parallel to the same side of the opening. A particularly good elasticity can be achieved with this L-shaped design.

[0016] The first and second stabilizing arms can be arranged at opposite sides of a substantially rectangular opening. This provides the advantage that the optoelectronic components can be held particularly stably within the opening by the stabilizing arms. Preferably, stabilizing arms are arranged at each of the four sides of the rectangular opening, extending particularly parallel to the respective side.

[0017] The length of the stabilizing arm can be configured to correspond to 25% to 75%, particularly 40% to 60%, and especially preferably 50% of the length of the rectangular side. Advantageously, this allows for particularly good elasticity.

[0018] The lighting device may be configured to include a light source that is configured to emit light onto optoelectronic components.

[0019] The fixing element can be configured to include at least two threaded parts, which are used to tighten the stabilizing element to the cooling element in the connected state. Advantageously, this allows for a particularly simple and cost-effective connection of the stabilizing element to the cooling element.

[0020] The optoelectronic component can be configured to have at least two holding regions on the active side, wherein a stabilizing arm abuts against each holding region. Preferably, the holding regions do not contain micromirrors.

[0021] It can be configured to design the stabilizing element as a plate.

[0022] The stabilizing element can be configured to be constructed of an insulating material or have an insulating coating. This results in the advantage of reducing undesirable heating of the micromirror and / or its controllers, thus ensuring that the micromirror's function is not negatively affected by heat.

[0023] According to the present invention, a motor vehicle headlight is provided, which includes the lighting device.

[0024] Within the scope of this specification, the terms “upper,” “lower,” “horizontal,” and “vertical” shall be understood as descriptions of the orientation of the lighting device when it is positioned in its normal use position after being installed in the headlights of a motor vehicle. Attached Figure Description

[0025] The present invention will now be described in more detail with reference to preferred embodiments; however, the present invention should not be limited to these embodiments. Wherein:

[0026] Figure 1 A view of the lighting device according to the invention is shown; and

[0027] Figure 2 It shows that according to Figure 1 A side view of the lighting device. Detailed Implementation

[0028] Figure 1 and Figure 2 Two views of an illumination device 1 for a motor vehicle headlight are shown. The illumination device 1 includes a photoelectronic component 2 having an active side on which a controllable assembly of multiple micromirrors is arranged. The micromirrors are arranged in a two-dimensional matrix with rows and columns and can oscillate independently of each other. The illumination device 1 also includes: a cooling element 3 that contacts the photoelectronic component 2 on a side opposite to the active side to cool the photoelectronic component 2; a circuit board 4 that is at least partially disposed between the cooling element 3 and the photoelectronic component 2 and connected to the photoelectronic component 2 for electronic control thereon; a stabilizing element 5 configured to additionally stabilize the position of the photoelectronic component 2 relative to the circuit board 4; and a fixing element 6 configured to interconnect the stabilizing element 5 and the cooling element 3. The stabilizing element 5 is plate-shaped.

[0029] The stabilizing element 5 has an opening 5a for surrounding the optoelectronic component 2, wherein at least two stabilizing arms 7 extend from the edge away from the opening 5a. The opening 5a is substantially rectangular in shape. The stabilizing arms 7 are configured to act on the optoelectronic component 2 at its active side in the connected state. The stabilizing arms 7 and the opening 5a are located in the same plane. In the connected state, the cooling element 3 contacts the optoelectronic component 2 on its side away from the active side such that the cooling element applies pressure to the optoelectronic component 2 in the direction of its active side. The at least two stabilizing arms 7 are elastically constructed and act on the active side of the optoelectronic component 2 such that the at least two stabilizing arms 7 resist the pressure from the cooling element 3.

[0030] The stabilizing arms 7 are oriented parallel to the sides of the rectangular opening 5a. The stabilizing arms 7 are arranged at opposite sides of the rectangular opening 5a.

[0031] exist Figure 1 In the embodiment shown, the stabilizing element 5 includes three stabilizing arms 7, wherein the third stabilizing arm is arranged at the short side of the rectangular opening 5a. The length of the stabilizing arm 7 preferably corresponds to 25% to 75%, particularly 40% to 60%, and especially preferably 50% of the length of the rectangular side.

[0032] As in Figure 2As can be seen, the fixing element 6 includes at least two threaded parts, and the stabilizing element 5 is tightened to the cooling element 3 using these threaded parts in the connected state. The optoelectronic component 2 has at least two holding regions 2a on its active side, wherein the stabilizing arm 7 abuts against each holding region 2a. The circuit board 4 has through openings at corresponding locations, through which the fixing element 6 passes in the connected state. The fixing element 6 engages with corresponding engagement openings in the stabilizing element 5 to achieve a secure connection between the stabilizing element 5 and the cooling element 3, wherein the circuit board 4 and the optoelectronic component 2 are substantially arranged between the stabilizing element 5 and the cooling element 3. The layered structure can... Figure 2 This can be seen from the text.

Claims

1. A lighting device (1) for a motor vehicle headlight, comprising: -Optoelectronic component (2), wherein, The optoelectronic component (2) has an active side, on which a plurality of controllable components of micromirrors are arranged. The micromirrors are arranged in a two-dimensional matrix with rows and columns and can swing independently of each other. - A cooling element (3) is provided, which contacts the optoelectronic component (2) on the side opposite to the action side to cool the optoelectronic component (2). - A circuit board (4), which is at least partially disposed between the cooling element (3) and the optoelectronic component (2) and connected to the optoelectronic component (2) for electronic control thereon. - A stabilizing element (5), the stabilizing element being configured to additionally stabilize the position of the optoelectronic component (2) relative to the circuit board (4). - A fixing element (6), which is configured to connect the stabilizing element (5) and the cooling element (3) to each other. Its features are, The stabilizing element (5) has an opening (5a) for surrounding the optoelectronic component (2), wherein at least two stabilizing arms (7) extend from the edge away from the opening (5a), the stabilizing arms being configured to act on the optoelectronic component (2) at the working side in the connected state, wherein, in the connected state, the cooling element (3) contacts the optoelectronic component (2) on the side away from the working side such that the cooling element applies pressure acting on the optoelectronic component (2) in the direction of the working side of the optoelectronic component (2), wherein the at least two stabilizing arms (7) are elastically constructed and act on the working side of the optoelectronic component (2) such that the at least two stabilizing arms (7) resist the pressure of the cooling element (3), wherein the stabilizing arms (7) and the opening (5a) are located in the same plane.

2. The lighting device (1) according to claim 1, wherein, The opening (5a) is constructed in a substantially rectangular shape.

3. The lighting device (1) according to claim 2, wherein, The first stabilizing arm (7) is oriented substantially parallel to a first side of the substantially rectangular opening (5a), and the second stabilizing arm (7) is oriented substantially parallel to a second side of the substantially rectangular opening (5a).

4. The lighting device (1) according to claim 2 or 3, wherein, The first stabilizing arm (7) and the second stabilizing arm (7) are arranged on opposite sides of the substantially rectangular opening (5a).

5. The lighting device (1) according to claim 2 or 3, wherein, The length of the stabilizing arm (7) corresponds to 25% to 75% of the length of the rectangular side of the opening (5a).

6. The lighting device (1) according to claim 2 or 3, wherein, The length of the stabilizing arm (7) corresponds to 40% to 60% of the length of the rectangular side of the opening (5a).

7. The lighting device (1) according to claim 2 or 3, wherein, The length of the stabilizing arm (7) corresponds to 50% of the length of the rectangular side of the opening (5a).

8. The lighting device (1) according to claim 2 or 3, comprising a light source configured to emit light onto the optoelectronic component (2).

9. The lighting device (1) according to claim 2 or 3, wherein, The fixing element (6) includes at least two threaded parts, and the stabilizing element (5) is tightened to the cooling element (3) using the threaded parts in the connected state.

10. The lighting device (1) according to claim 2 or 3, wherein, The optoelectronic component (2) has at least two holding regions (2a) on the active side, wherein the stabilizing arm (7) is abutted against each holding region (2a).

11. The lighting device (1) according to claim 2 or 3, wherein, The stabilizing element (5) is designed in a plate shape.

12. The lighting device (1) according to claim 2 or 3, wherein, The stabilizing element (5) is constructed of insulating material or has an insulating coating.

13. A motor vehicle headlight comprising a lighting device (1) according to any one of claims 1 to 12.

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