Headlamp for vehicle

Abstract

The invention relates to a headlight for a vehicle, comprising a number of light sources and a number of lenses arranged in front of the light sources, each lens having a light entry surface arranged on the side facing the light sources and a light exit surface arranged on the side facing away from the light sources, the plurality of lenses being connected to one another in one piece in order to produce a predetermined light distribution, there are provided as lenses: a number of front-field light lenses configured such that light emitted from the at least one light source exits a sub-light distribution into a front-field region as a low-beam distribution by means of the front-field light lenses; a number of action range lenses, which are designed in such a way that the light emitted from the at least one light source is imaged by means of the action range lenses as a sub-light distribution of the low beam distribution in the action range region; a number of high beam lenses configured such that light emitted from the at least one light source is imaged as a sub-light distribution in a far field region above a light / dark boundary of the low beam distribution.

Description

Technical Field

[0001] The present invention relates to a headlamp for a vehicle, the headlamp comprising a certain number of light sources and a certain number of lenses arranged in front of at least one of the light sources along a main radiation direction, the lenses respectively comprising a flat light incident surface arranged on a side facing one of the light sources and a curved light exit surface arranged on a side facing away from one of the at least one light sources, wherein a plurality of lenses are integrally connected to one another in order to produce a predetermined light distribution. Background Art

[0002] DE102018131027A1 discloses a headlamp for a vehicle, which has a light module composed of three lenses to generate a low-beam distribution. A light source is provided for each lens. A shading element having a shading edge contour is arranged between the light source and the flat light incident surface of the corresponding lens, so that the shading edge contour is imaged by the lens to generate a light-dark boundary of the low-beam distribution. The three lenses are arranged side by side in the horizontal direction, wherein the middle lens generates a sub-light distribution different from the outer lenses arranged adjacently opposite each other. Because the edge of the curved light exit surface is arranged at a distance from the light incident surface, the emitted luminous flux is limited. Summary of the invention

[0003] The object of the present invention is to further develop a headlamp for a vehicle in such a way that the efficiency is increased in a simple manner, wherein in particular a high-beam beam distribution can also be generated.

[0004] In order to achieve the above-mentioned purpose, the present invention is characterized in that, as lenses, there are provided: a certain number of front-field light lenses, which are configured so that the light emitted from the at least one light source is emitted by means of the front-field light lenses to become a sub-light distribution of the low-beam distribution in the front-field area; a certain number of range lenses, which are configured so that the light emitted from the at least one light source is imaged by means of the range lenses to become a sub-light distribution of the low-beam distribution in the range area; and a certain number of high-beam lenses, which are configured so that the light emitted from the at least one light source is imaged as a sub-light distribution in the far-field area above the light-dark boundary of the low-beam distribution.

[0005] The particular advantage of the present invention is that by distributing the lens functions to generate the range light distribution, the front light distribution and the high beam distribution, a low beam distribution and a high beam distribution can be generated in a simple manner. By distributing the lens functions to generate the sub-light distributions for the range light and the front light, a high-intensity low beam distribution can be generated in a targeted manner.

[0006] According to an improved solution of the present invention, the light source is arranged directly adjacent to the light incident side of the front field light lens and / or the range light lens or arranged at a small distance relative to the light incident side of the front field light lens and / or the range light lens, so that the edge of the light source is imaged as the light-dark boundary of the low-beam distribution in cooperation with the same lens. This can advantageously reduce manufacturing costs because no shading or shielding is required. The sub-light distribution or the synthesized light distribution is caused only by the combination of the light source and the lens, wherein a plurality of lenses are provided to produce the low-beam distribution.

[0007] According to an improved solution of the present invention, a planar beam shielding element is provided between the light source and the light incident surface of the range light lens and / or the front field light lens, and the beam shielding element is provided with a plurality of cutouts so that the light in the outer edge region of the light incident on the light incident surface of the lens is suppressed or absorbed or prevented from entering the lens. Such a beam shielding element is only irradiated by a small amount of edge light, and thus has no aperture function.

[0008] According to an improved solution of the present invention, a first light module is provided, which has two front-field light lenses. The first front-field light lenses are configured to image the first sub-light distribution in the front-field region of the low-beam distribution, wherein the light center of gravity of the first sub-light distribution is located in the following section of the front-field region of the low-beam distribution, and the oncoming lane is illuminated by means of the section.

[0009] In addition, the first light module has a second front field light lens for generating a second sub-light distribution, wherein the second sub-light distribution has a larger scattering width than the first sub-light distribution of the first front field light lens. The second sub-light distribution extends along a narrow strip just below the light-dark boundary extending along the zero line.

[0010] According to a further development of the present invention, the first front-field light lens is arranged to be pivoted through an acute angle about a vertical axis so that the light center of gravity of the first partial light distribution is located in the region of the oncoming lane.

[0011] According to an improved solution of the present invention, the second front field light lens is constructed so that the maximum horizontal right scattering angle extending about the optical axis is greater than the maximum scattering angle on the left in the horizontal direction, or so that the maximum horizontal left scattering angle extending about the optical axis is greater than the maximum horizontal right scattering angle. The second front field light lens can be arranged, for example, in the right headlamp and the left headlamp in mirror-opposite manner about the vertical axis, so that the second sub-light distributions of the right headlamp and the left headlamp are superimposed into a symmetrical synthetic sub-light distribution. Advantageously, the second front field light lens only needs to be constructed in such a way that the second front field light lens has a relatively large scattering angle on the first side and a smaller maximum scattering angle on the opposite side.

[0012] According to an improved solution of the present invention, a high beam lens is arranged between the first front field light lens and the second front field light lens, and these lenses are connected to each other in one piece. Advantageously, a compact first light module is formed, which can also generate a high beam distribution in addition to a partial low beam distribution.

[0013] According to a further development of the present invention, a second light module is provided, which has two range light lenses. The first range light lens is configured to image the first sub-light distribution into the range of action of the low beam distribution, wherein the area immediately below the light-dark boundary is illuminated.

[0014] Preferably, the second range light lens is configured so that a second sub-light distribution is imaged in the range of action of the low beam distribution, the second sub-light distribution being spaced further from the light-dark boundary than the first sub-light distribution of the first range light lens. Advantageously, the combination of the two range light lenses can achieve optimized illumination in the range of action.

[0015] According to an improved solution of the present invention, the second range light lens is configured so that the legal 75R light value of the low beam distribution is met by means of the second sub-light distribution in the range area generated thereby. For example, the first range light lens and the second range light lens can be implemented to be rotationally symmetrical about the optical axis.

[0016] According to a further development of the present invention, a high-beam lens is arranged between the first range-of-light lens and the second range-of-light lens, so that a high-beam function can be additionally realized.

[0017] According to an improved solution of the present invention, the edge of the range light lens and / or the front field light lens and / or the far light lens extends near or next to the light incident surface of the corresponding lens. Therefore, the light exit surfaces of these lenses extend in a solid angle range of 180° about the optical axis, thereby ensuring effective light exit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0019] In the figure:

[0020] Figure 1 shows a schematic top view of a headlight having a first light module (light module on the left) and a second light module (light module on the right),

[0021] Figure 2 A view showing two superimposed partial light distributions of a first light module for generating a low-beam light distribution,

[0022] Figure 3 shows the superposition of two superimposed partial light distributions of a second light module for generating a low-beam light distribution,

[0023] Figure 4 shows the light distribution caused when all light sources of the two light modules are activated, and

[0024] Figure 5 A front view of a first light module is shown. DETAILED DESCRIPTION

[0025] A headlamp for a vehicle is used to generate a predetermined low-beam light distribution, which generates, for example, a low-beam light distribution 1 and a high-beam light distribution 2 .

[0026] The headlight has a plurality of lenses and light sources respectively associated with the lenses, which are used to generate partial light distributions. A low-beam light distribution 1 is generated by superposition of the partial light distributions, and a high-beam light distribution 2 is generated when further lenses imaged on the light-dark boundary HDG are switched on.

[0027] In the present embodiment, it is assumed that the headlight has a first light module 3 and a second light module 4. The two light modules 3, 4 have in common that they each have three lenses which are connected to one another in one piece. Each lens is assigned at least one light source.

[0028] exist Figure 1 The left headlamp of the vehicle is shown by way of example in FIG. The first light module 3 includes a first front field light lens 5 for generating a first sub-light distribution 8 in a front field area VB, a second front field light lens 6 for generating a second sub-light distribution 9 in the front field area VB, and a high beam lens 7 for generating a first sub-light distribution 10 in a far field area FB of the space in front of the vehicle.

[0029] The second light module 4 has a first range light lens 11 for generating a first sub-light distribution 14 in a range area RB, a second range light lens 12 for generating a second sub-light distribution 15 in the range area RB, and a second high-beam lens 13 for generating a second sub-light distribution 16 in a far-field area FB in the space in front of the vehicle.

[0030] The lenses 5, 6, 7, 11, 12, 13 are designed as deformed lenses whose shape is optimized according to the partial light distribution to be generated. The lenses 5, 6, 7, 11, 12, 13 each have a flat light entrance surface 17 and a curved light exit surface 18. These components with the same function are provided with the same reference numerals.

[0031] It can be seen that the edge 19 of the light exit surface 18 of the lenses 5, 6, 7, 11, 12, 13 extends to a connecting region 20, which reaches the vicinity of the light entrance surface 17 or directly reaches the light entrance surface 17, which has a light entrance surface 17 on the side opposite the lens. In particular, in the second light module 4, the light exit surface 18 of the lenses 11, 12, 13 extends over a solid angle of 180° with respect to the optical axis 26. In contrast, the edge 19 of the lenses 5, 6, 7 of the first light module 3 extends over a solid angle of only 160° with respect to the optical axis 26. Therefore, the edge 19 of the adjacent lens 5, 6, 7 adjoins the edge 19 of the adjacent lens 5, 6, 7 on the side facing the lens side.

[0032] The light entrance surfaces 17 of the second light module 4 extend in a plane relative to each other, while the light entrance surface 18 of the first light module 3 does not extend in a plane. The lens 5 is arranged in the secondary section 23 to be rotated about a vertical axis at a rotation angle φ relative to the other lenses 6 and 7 of the main section 22. The first front field light lens 5 is pivotally arranged at a rotation angle φ extending in a horizontal plane relative to the second front field light lens 6 and the first high beam lens 7. By means of this rotated arrangement of the first front field light lens 5, the light coupled into the first front field light lens is deflected in the direction of the opposite lane. The first sub-light distribution 8 thus generated has the shape of a half-filled ellipse. The first front field light lens 5 has the shape of a solid ellipsoid and corresponds to a deformed lens. The rotation angle φ can be, for example, 10°.

[0033] Each lens 5, 6, 7, 11, 12, 13 is assigned a light source 24, which is preferably positioned directly on the light entry surface 17. The light source 24 is arranged with its main axis perpendicular to the light entry surface 17. The light source 24 is located on the optical axis 26 of the corresponding lens 5, 6, 7 or 11, 12, 13.

[0034] The first front field light lens 5 is oriented toward the oncoming lane so that the center of gravity S of the first sub-light distribution 8 is located on the oncoming lane. Figure 2 As can be seen in FIG. 8 , the first sub-light distribution 8 directly adjoins the portion of the light-dark boundary HDG extending on the zero line.

[0035] The second front field light lens 6 is shaped so that the second sub-light distribution 9 generated thereby is also arranged on the portion of the light-dark boundary HDG extending through the horizontal zero line. However, unlike the first sub-light distribution 8, the second sub-light distribution 9 has a larger scattering width. The second sub-light distribution 9 extends as a narrow strip below the zero line of the light-dark boundary HDG and is therefore used to illuminate a smaller vertical area of ​​the low beam distribution 1 than the first sub-light distribution 5.

[0036] exist Figure 1, the left headlamp of the vehicle is shown. The right headlamp of the vehicle, not shown, has the same construction except for the following. The second front field light lens 6 is arranged in a mirror-opposite manner to the second front field light lens 6 of the left headlamp with respect to the vertical middle plane, so that the second sub-light distribution 9 of the right headlamp is also in a mirror-opposite manner to the second sub-light distribution 9 of the left headlamp. The second sub-light distribution 9 of the left headlamp has a relatively large section in the negative region of the horizontal line H and a relatively small section in the positive horizontal region, while the second sub-light distribution 9 of the right headlamp has a relatively large section in the positive region of the horizontal line H and a small section in the negative region of the horizontal line H. Therefore, when the right and left headlamp are activated, the asymmetric second sub-light distributions 9 are superimposed to form a composite sub-light distribution that is symmetrical about the vertical line V, and the sub-light distribution extends in a relatively narrow band below the horizontal zero line H or adjacent to the horizontal zero line H.

[0037] The first high beam lens 7 is arranged between the first front field light lens 5 and the second front field light lens 6. The lenses 5, 6, 7 are connected to each other in one piece. The first high beam lens 7 can be designed rotationally symmetrically and generates a first sub-light distribution 10, which extends over the light-dark boundary HDG.

[0038] The second light module 4 (like the first light module 3) has a central second high-beam lens 13, which can be designed, for example, identically to the first high-beam lens 7 of the first light module 3. The second high-beam lens can be designed, for example, to be rotationally symmetrical.

[0039] The first range lens 11 of the second light module 4 is configured so as to mainly illuminate the own lane. Figure 3 It can be seen that the first sub-light distribution 14 of the first range light lens 11 extends below the light-dark boundary HDG and preferably above the horizontal line H in the positive horizontal region H.

[0040] Second range-of-light lens 12 is designed such that second partial light distribution 15 is used to achieve the legally required light value of 75R in the central region of low-beam beam distribution 1 .

[0041] exist Figure 4 The superposition of all generated sub-light distributions is shown in FIG. The first sub-light distributions 8, 14 or 9, 15 caused by the first and second front light lenses 5, 6 and the first and second range light lenses 11, 12 are used to generate the low-beam light distribution 1. If the high-beam light distribution 2 is to be generated, the light sources assigned to the first high-beam lens 7 and the second high-beam lens 13 are additionally switched on, so that the first sub-light distribution 10 of the first light module 3 and the second sub-light distribution 16 of the second light module 4 are generated above the light-dark boundary HDG.

[0042] The light sources 24 assigned to the first front field light lens 5 and the second front field light lens 6 or the first range light lens 11 and the second range light lens 12 are arranged in the region of the optical axis 26 so that the edge of the corresponding light source 24 is imaged as the light-dark boundary HDG of the low beam distribution 1. No additional shading member having a shading edge that is imaged as the light-dark boundary HDG is provided.

[0043] According to an alternative embodiment of the invention (not shown), only a single high-beam lens may also be provided if the associated light source is designed to be relatively powerful.

[0044] According to an alternative embodiment of the present invention (not shown), the first light module 3 and the second light module 4 may be connected to each other in one piece.

[0045] The first light module 3 and the second light module 4 are respectively manufactured by injection molding and are made of plastic material.

[0046] The light source 24 is preferably designed as an LED light source which is preferably positioned on a common printed circuit board.

[0047] According to an alternative embodiment of the present invention, a planar beam shielding element (not shown) may be provided between the corresponding light source 24 and the light incident surface 17 and / or the range light lenses 11, 12 and / or the high beam lenses 7, 13, which has a plurality of cutouts such that the light beam emitted by the light source 24 is suppressed in its outer edge region. Thus, scattered light is prevented from entering the respective lenses.

[0048] Preferably, the light source 24 is directly arranged on the first front-field light lenses 5 , 6 and / or the first range light lenses 11 , 12 and / or the first high-beam lenses 7 , 13 .

[0049] According to the present embodiment, each lens 5 , 6 , 7 ; 11 , 12 , 13 is assigned with a single LED light source.

[0050] Reference numerals list

[0051] 1 Low beam distribution

[0052] 2High beam distribution

[0053] 3First optical module

[0054] 4 Second optical module

[0055] 5First front field light lens

[0056] 6 Second front field light lens

[0057] 7First high beam lens

[0058] 8First sub-light distribution

[0059] 9 Second sub-light distribution

[0060] 10First sub-light distribution

[0061] 11First range of action light lens

[0062] 12 Second range of action light lens

[0063] 13 Second high beam lens

[0064] 14First sub-light distribution

[0065] 15 Second sub-light distribution

[0066] 16 Second sub-light distribution

[0067] 17 Light incident surface

[0068] 18 Light exit surface

[0069] 19 Edge

[0070] 22 Main Segment

[0071] 23 sub-sectors

[0072] 24 light sources

[0073] 25 dorsal

[0074] 26 optical axes

[0075] H horizontal line

[0076] S-center of gravity

[0077] V vertical plane

[0078] HDG light-dark boundary

[0079] VB front court area

[0080] FB far field area

[0081] RB range area

[0082] φ Pivot angle / rotation angle

Claims

1. A headlamp for a vehicle, the headlamp comprising a number of light sources (24) and a number of lenses (5, 6, 7; 11, 12, 13) arranged in front of at least one of the light sources (24) along a main radiation direction, the lenses each comprising a flat light entrance surface (17) arranged on a side facing one of the light sources (24) and a curved light exit surface (18) arranged on a side facing away from one of the at least one light source (24), wherein: In order to generate a predetermined light distribution (1, 2), a plurality of lenses (5, 6, 7; 11, 12, 13) are connected to one another in one piece, characterized in that the lenses provided are: - a certain number of front-field light lenses (5, 6), wherein the front-field light lenses (5, 6) are configured such that light emitted from the at least one light source (24) is emitted by means of the front-field light lenses (5, 6) to form a sub-light distribution (8, 9) of the low beam distribution (1) into the front-field region (VB), - a number of range lenses (11, 12), the range lenses (11, 12) being designed such that light emitted from the at least one light source (24) is imaged by means of the range lenses (11, 12) into a partial light distribution (14, 15) of the low beam light distribution (1) in a range region (RB), - a number of high-beam lenses (7, 13), which are configured such that light emitted from the at least one light source (24) is imaged as a sub-light distribution (10, 16) in a far-field region (FB) above a light-dark boundary of the low-beam light distribution (1).

2. The headlamp according to claim 1, characterized in that: The at least one light source (24) is arranged directly adjacent to the light incident side (17) of the front-light lens (5, 6) and / or the range lens (11, 12) or the high-beam lens (7, 8).

3. The headlamp according to claim 1 or 2, characterized in that: The range lens (11, 12) and / or the front light lens (5, 6) are configured so that an edge of the at least one light source (24) is imaged as a light-dark boundary (HDG) of the low-beam light distribution (1).

4. The headlamp according to any one of claims 1 to 3, characterized in that: A planar light beam shading element is provided on the light incident surface (17) of the front-field lens (5, 6) and / or the range lens (11, 12), and the light beam shading element is provided with a plurality of recessed portions for suppressing light in the outer edge region of a light beam emitted from a corresponding light source (24).

5. The headlamp according to any one of claims 1 to 4, characterized in that: A first light module (3) is provided, the first light module having two front-field light lenses (5, 6) and a certain number of light sources (24) respectively assigned to the front-field light lenses, the first front-field light lens (5) being configured so that a first sub-light distribution (8) is imaged in a front-field region (VB) of the low-beam distribution (1), wherein a center of gravity (S) of the first sub-light distribution (8) is arranged in a section of the front-field region (VB) by means of which an oncoming lane is illuminated.

6. The headlamp according to any one of claims 1 to 5, characterized in that: The first front-field light lens (5) is pivotally arranged about a vertical plane relative to a second front-field light lens (6) that generates a second sub-light distribution (9), the second front-field light lens (6) being configured such that the second sub-light distribution (9) has a larger horizontal scattering width than the first sub-light distribution (8) of the first front-field light lens (5).

7. The headlamp according to any one of claims 1 to 6, characterized in that: The second front field light lens (6) is configured such that a maximum horizontal right scattering angle extending about the optical axis (26) is greater than a maximum horizontal left scattering angle, or such that a maximum horizontal left scattering angle extending about the optical axis is greater than a maximum horizontal right scattering angle, and the second front field light lenses (6) of the right headlamp and the left headlamp of the vehicle are arranged complementary to each other about the optical axis (26), so that by superimposing the second sub-light distributions (9) of the left headlamp and the right headlamp, the synthesized second sub-light distribution (9) of the second front field light lens (6) extends symmetrically about a vertical plane (V) extending through the optical axis (26).

8. The headlamp according to any one of claims 1 to 7, characterized in that: The light incident surface (17) of the first front-field light lens (5) is arranged to be rotated relative to the light incident surface (17) of the second front-field light lens (6) by a rotation angle (φ) that is acute with respect to the vertical plane (V).

9. The headlamp according to any one of claims 1 to 8, characterized in that: A high-beam lens (7) is arranged between the first front-field light lens (5) and the second front-field light lens (6), and the first front-field light lens (5), the second front-field light lens (6) and the high-beam lens (7) are connected to each other in one piece.

10. The headlamp according to any one of claims 1 to 9, characterized in that: A second light module (4) is provided, the second light module having a first range light lens (11) and a second range light lens (12) and light sources (24) respectively assigned to the first range light lens and the second range light lens, the first range light lens (11) being configured so that a first sub-light distribution (14) of the first range light lens is imaged into a range region (RB) of the low beam distribution (1), wherein an area immediately below a light-dark boundary (HDG) is illuminated.

11. The headlamp according to any one of claims 1 to 10, characterized in that: The second range light lens (12) is designed such that a second sub-light distribution (15) generated by the second range light lens has a greater distance from a horizontal zero line (H) than the first sub-light distribution (14) of the first range light lens (11).

12. The headlamp according to any one of claims 1 to 11, characterized in that: The second range light lens (12) is designed to generate a 75R light value of the low beam light distribution (1) by means of a second sub-light distribution (15) generated by the second range light lens.

13. The headlamp according to any one of claims 1 to 12, characterized in that: A high-beam lens (13) is arranged between the first range light lens (11) and the second range light lens (12), and the first range light lens (11), the second range light lens (12) and the high-beam lens (13) are integrally connected to one another.

14. The headlamp according to any one of claims 1 to 13, characterized in that: The light incident surfaces (17) of the first range light lens (11), the second range light lens (12) and the high beam lens (13) extend in a common plane.

15. The headlamp according to any one of claims 1 to 14, characterized in that The edge (19) of the first front field light lens (5) and / or the second front field light lens (6) and / or the first far beam lens (7) and / or the first range light lens (11) and / or the second range light lens (12) and / or the first far beam lens (7) and / or the second far beam lens (13) at least partially extends directly or in the vicinity of the light incident surface (17) of the first near field lens (5) and / or the second near field lens (6) and / or the first range lens (11) and / or the second range lens (12) and / or the first far beam lens (7) and / or the second far beam lens (13).

Images