Lighting device for vehicle
By arranging the lens and the second light source in the vehicle lighting device, the problem of uneven light distribution is solved, and a comprehensive lighting effect is achieved, ensuring that the lens surface is evenly illuminated and dark areas and stripes are eliminated.
Patent Information
- Application Number
- CN202411195653.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-09-05
- Filing Date
- 2024-08-29
- Publication Date
- 2024-12-10
AI Technical Summary
The light distribution of existing vehicle lighting devices is uneven, resulting in dark areas or stripes on the lens surface, affecting the observation effect.
The lens is arranged in the light emission direction before the reflector surface, and the second light source is placed outside the focus area, so that its light is incident on the lens, ensuring that the lens is illuminated completely and evenly, while the light of the second light source is made through the scattered light section. It is reflected targetedly to the area where the lens is not covered by the first light source to form a uniform light emitting surface.
The uniform light distribution of the lighting device is achieved, dark areas and stripes are eliminated, observation effect is improved, and independent of the current light function, ensuring uniform illumination of the entire lens surface.
Smart Images
Figure CN119103500A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a lighting device for a vehicle, comprising a light source unit and an optical unit including a reflector having at least one reflector surface, for generating a predetermined light distribution, wherein the light source unit has a first light source arranged in a focal region of the reflector surface, and has a second light source arranged outside the focal region of the reflector surface. Background Art
[0002] DE 10 2014 111 445 A1 discloses a lighting device for a vehicle comprising a light source unit and an optical unit, which has two different light sources for generating different light distributions, and a common reflector surface is assigned to the two different light sources. The first light source is arranged in the focal region of the reflector, so that the light emitted by the first light source is reflected corresponding to the low beam distribution. The second light source is arranged outside the focal region of the reflector surface, wherein the light emitted by the second light source is propagated by means of the primary optical system assigned thereto, and the light is redirected to the daytime running light function by means of the reflector surface. The known lighting device does not have a lens. Summary of the invention
[0003] It is therefore an object of the present invention to further develop a lighting device for a vehicle so that a light-emitting surface of the lighting device formed by a lens has a uniform appearance.
[0004] In order to solve this task, the present invention, in combination with the preamble of claim 1, is characterized in that a lens is arranged in front of the reflector surface along the light emission direction; the second light source is arranged outside the focal area so that the light emitted by the second light source is incident on the lens section of the lens that is not incident on the light emitted by the first light source and reflected by the reflector surface, so that all lens sections of the lens are illuminated.
[0005] According to the invention, a second light source arranged outside the focal region of the reflector surface serves to illuminate an upstream region or section of the lens which would otherwise be dark. The second light source does not provide light for producing a light distribution or a light function. The purpose of the second light source is merely to ensure that the entire lens is illuminated so that, independent of the currently switched light function, the entire lens surface is perceived from the outside as a uniformly luminous surface without dark regions or stripes for an observer.
[0006] According to a preferred embodiment of the present invention, the second light source is arranged at such a distance from the first light source that the light emitted by the second light source is incident on a scattered light section of the reflector surface, and the scattered light section is designed to make the light of the second light source reflected or redirected in a scattered manner, wherein the light is incident on at least an area of the lens that is not covered by the light emitted by the first light source. The light emitted by the first light source is incident on a light function section of the reflector surface, and the light of the first light source is redirected by means of the light function section, so that a predetermined light function or light distribution, such as a low beam distribution, is imaged into the front area of the vehicle by means of the lens. The light of the first light source is guided and / or redirected by the light function section in accordance with the predetermined light distribution, while the light emitted by the second light source is only scattered on the lens in a targeted manner by means of the scattered light section of the reflector surface.
[0007] According to a further embodiment of the present invention, the second light beam redirected by the scattered light segment has a larger aperture angle than the first light beam, which is formed by the light of the second light source and which is redirected on the light function segment of the reflector surface. The first light beam is limited to the lens segment provided for the imaging light function, while the second light beam is projected beyond the edge of the lens segment into the adjacent region of the lens segment, thereby ensuring that the adjacent lens segment of the lens is illuminated. Advantageously, the entire lens is thus illuminated.
[0008] According to a further development of the invention, the first light source and the second light source are positioned on a common printed circuit board.
[0009] According to a further development of the invention, the lighting device has a plurality of reflector surfaces, each of which is assigned a first light source for generating the same or different light distributions. Different reflector surfaces are assigned different light segments, by means of which the corresponding light beams of the light functions are imaged onto the front area of the vehicle. If the first light source is used in conjunction with the reflector surface and the lens segment to generate a high-beam distribution that is only temporarily added to another light function, such as a low-beam distribution, the second light source is arranged spaced apart from the first light source for generating the low-beam distribution. This ensures that the lens segment of the lens provided for the high-beam distribution is illuminated in the state where the high-beam distribution is switched off.
[0010] According to a further development of the invention, the lens segments provided for imaging different light distributions are connected to one another in one piece. The arrangement of the second light source ensures that the entire surface of the lens is illuminated when at least one light function is switched on. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Exemplary embodiments of the present invention are explained in detail below with reference to the drawings. In the attached picture:
[0012] Figure 1 The lighting device according to the present invention is shown along Figure 2A vertical longitudinal section of section line I in;
[0013] Figure 2 A schematic top view showing a lighting device; and
[0014] Figure 3 A front view of a lens of a lighting device is shown. DETAILED DESCRIPTION
[0015] The lighting device for a vehicle is preferably designed as a headlamp which is used to generate a predetermined light distribution, for example a low-beam distribution and / or a high-beam distribution.
[0016] In order to generate a predetermined light distribution, the lighting device comprises a plurality of light sources 1 , 13 and an optical unit 2 which are assembled inside a housing.
[0017] The optical unit 2 comprises a reflector 5 on the one hand and a lens 6 on the other hand, wherein the reflector 5 is arranged in the light guiding direction between the light source 1 , 13 on the one hand and the lens 6 on the other hand.
[0018] The reflector 5 has a plurality of reflector surfaces R A11 , R A12 , R A13 , R A2 , R B1 , R B2 , each of these reflector surfaces is equipped with a first light source 1 for generating a predetermined light distribution. The first light source 1 is arranged on the corresponding reflector surface R A11 , R A12 , R A13 , R A2 , R B1 , R B2 The focal region 11 of the lens 10 is formed by a light source 1 or a light beam 7, wherein the light or light beam 7 emitted by the first light source 1 is redirected by the light functional section 15 of the reflector surface in accordance with the predetermined light distribution and is incident on the reflector surface R of the lens 10 assigned to the corresponding reflector surface R A11 , R A12 , R A13 , R A2 , R B1 , R B2 The lens segment L A1 , L A2 , L B1 , L B2 In the present embodiment, the light functional section 15 is arranged in a region close to the vertex of the reflector surface.
[0019] The light function section 15 is configured so that the light beam 7 emitted by the first light source 1 is incident on the corresponding lens section L A1 , L A2 , L B1 , LB2 above and not exceeding the corresponding lens segment L A1 , L A2 , L B1 , L B2 The edge 16 of the reflector is incident on the lens 6. In this embodiment, the reflector surface R A11 , R A12 and R A13 The light function section 15 is configured so that the light 7 reflected thereon is incident on the first lens section L A1 Reflector surface R A2 The light function section 15 is configured so that the light 7 reflected thereon is incident on the second lens section L A2 Reflector surface R A11 , R A12 , R A13 and R A2 The light functional section 15 is designed so that the light beam 7 emitted by the first light source 1 is used to generate a low-beam light distribution, which is provided by the light section L A1 and L A2 Imaging into the area in front of the vehicle.
[0020] Reflector surface R B1 and R B2 Assigned to lens segment L B1 and L B2 . Reflector surface R B1 , R B2 The light functional sections 15 are designed so that the light beams of the first light source 1 incident on these light functional sections are redirected corresponding to the high beam distribution and are reflected by the lens section L B1 , L B2 Imaging into the area in front of the vehicle to form the high beam distribution.
[0021] If all first light sources 1 are switched on, the entire surface of the lens 6, that is, the lens segment L A1 , L A2 , L B1 , L B2 And through the lens segment L A1 and L A2 Imaged low beam distribution and lens segment L B1 and L B2 Imaged high beam distribution superposition.
[0022] If the lighting device is not to be used to generate a combined low-beam / high-beam light distribution, but only to generate a low-beam light distribution, then only the reflector associated with the first reflector surface R A11 , R A12 , R A13 , R A2The first light source 1 is disconnected from the second reflector surface R B1 and R B2 In this case, only the lens segment L is illuminated. A1 and L A2 , without illuminating the lens segment L B1 and L B2 , see Figure 2 The lens segment L in B1 and L B2 The point mark.
[0023] In order to illuminate the entire lens 6 or the entire surface of the lens 6 and thus also the lens segment L in the low-beam light distribution operating situation, B1 and L B2 , is the first reflector surface R A11 , R A12 , R A13 , R A2 A second light source 13 is provided, which is arranged at a distance a from the first light source 1 and is outside the focal region 11. In the present embodiment, the first light source 1 and the second light source 13 are arranged on a common circuit board 8.
[0024] The light or light beam 14 emitted by the second light source 13 is incident on the reflector surface R A11 , R A12 , R A13 or R A2 The scattered light sections 17, 17' are thus emitted from the reflector 5 at a larger opening angle than the light beam of the first light source 1, which is emitted by the first reflector surface R A11 , R A12 , R A13 , R A2 The light beam 14 is deflected by means of the first reflector surface R A11 , R A12 , R A13 , R A2 The scattered light section 17 is reflected so that the light beam exceeds the first reflector surface R assigned to the corresponding A11 , R A12 , R A13 , R A2 The lens segment L A1 , L A2 The light is emitted from the edge 16 of the reflector and illuminates the second reflector surface R B1 , R B2 The adjacent lens segment L B1 , L B2 .exist Figure 1 In the figure, the light beam 14 is plotted to extend horizontally alongside the lens segment L. A1 .
[0025] In this embodiment, the second light beam 14 is scattered so that it is reflected by the external reflector surface R A11 , R A13 The reflected light 14 is incident on the adjacent lens segment L B1 and L B2 The light 14 is reflected by another reflector surface R A2 The scattered light segments 17, 17' are scattered so that the light is also incident on the adjacent lens segments L B2 Therefore, when the first reflector surface R is connected A11 , R A12 , R A13 , R A2 The first light source 1 ensures that the entire lens 6 is illuminated. Therefore, the first reflector surface R is turned on and off at the same time. A11 , R A12 , R A13 , R A2 The first light source 1 and the second light source 13 are provided.
[0026] Alternatively, when the second reflector surface R is configured B1 , R B2 When the first light source 1 is turned on, the second light source 13 can also be turned off. In this case, the lens segment L B1 and L B2 By providing a reflector surface R for high beam distribution B1 , R B2 The corresponding light beam 7 illuminates.
[0027] In the present embodiment, the circuit board 8 is arranged along the main emission direction H of the lighting device. The circuit board 8 is therefore parallel to the lens segment L. A1 , L A2 The optical axis 9 extends.
[0028] Lens section L A1 , L A2 , L B1 , L B2 For example, the lens segment L can be designed to be plano-convex. A1 , L A2 , L B1 , L B2 A diffuser optical element, for example a prismatic element, may be provided.
[0029] In this embodiment, the lens segment L A1 , L A2 , L B1 , L B2 Connected to each other in one piece.
[0030] In this embodiment, the reflector surface RA11 , R A12 , R A13 , R A2 , R B1 , R B2 Connected to each other in one piece.
[0031] According to an alternative embodiment of the invention, the adjacent reflector surfaces R A11 , R A12 , R A13 , R A2 , R B1 , R B2 and / or lens segment L A1 , L A2 , L B1 , L B2 They may be arranged spaced apart from each other.
[0032] As Figure 1 It can be seen that the lighting device shown has a reflector surface R A11 , R A12 , R A13 , R A2 The lighting device further comprises a first scattered light segment 17 in an extension of the light functional segment of the lens. In addition, the lighting device comprises a second scattered light segment 17' arranged on a side opposite to the first scattered light segment 17. The second scattered light segment 17' is arranged in the region of the circuit board 8 and is oriented so that the light reflected by the first scattered light segment 17 is directed toward the lens segment L again. A1 , L A2 In this way, a larger opening angle or scattering range in the vertical and / or horizontal direction is ensured.
[0033] In the present embodiment, the reflector surfaces R are configured for different light distributions, namely, the low beam distribution and the high beam distribution. A11 , R A12 , R A13 , R A2 and lens segment L A1 , L A2 are arranged alternately with each other.
[0034] According to an alternative embodiment of the invention (not shown), the reflector surface R assigned to the low beam distribution A11 , R A12 , R A13 , R A2 Or lens segment L A1 , L A2 They can also be arranged side by side directly, and the reflector surface R B1 , R B2 Or lens segment L B1 , L B2Arranged vertically and staggered therewith.
[0035] According to an alternative embodiment of the present invention (not shown), the lighting device has only the first scattered light segment 17 and the second scattered light segment 17 ′ is omitted.
[0036] The first light source 1 and the second light source 13 are preferably designed as LED light sources. Reference numerals list
[0037] 1 Light Source
[0038] 2 optical units
[0039] 3 Shell
[0040] 4-end sealed disc
[0041] 5. Reflector
[0042] 6 lenses
[0043] 7 beams
[0044] 8 Circuit Board
[0045] 9 optical axes
[0046] 10 Lenses
[0047] 11Focus Area
[0048] 12 reflector surface
[0049] 13 Tone Correction Light Sources
[0050] 14 Beam
[0051] 15 Light function section
[0052] 16 Edge
[0053] 17, 17' scattered light section
[0054] aDistance
[0055] R A11 —R B2 Reflector surface
[0056] L A1 —L B2 Lens section
[0057] H Main emission direction
[0058] A axis
Claims
1. A lighting device for a vehicle, comprising a light source unit and a reflector having at least one reflector surface (R A11 , R A12 , R A13 , R A2 , R B1 , R B2 ) of an optical unit (2) having a reflector (5) for generating a predetermined light distribution, wherein: The light source unit - having a first light source (1), the first light source being arranged on a reflector surface (R A11 , R A12 , R A13 , R A2 , R B1 , R B2 ) in the focal region (11), and - having a second light source (13), the second light source being arranged on the reflector surface (R A11 , R A12 , R A13 , R A2 , R B1 , R B2 ) outside the focal area (11), It is characterized in that - Along the light emission direction on the reflector surface (R A11 , R A12 , R A13 , R A2 , R B1 , R B2 ) before arranging the lens (6), The second light source (13) is arranged outside the focal region (11), so that the light (14) emitted by the second light source (13) is incident on the portion of the lens (6) that is not emitted by the first light source (1) and is reflected by the reflector surface (R A11 , R A12 , R A13 , R A2 , R B1 , R B2 ) The reflected light (7) enters the lens segment (L B1 , L B2 ) on the lens (6), so that all lens segments (L A1 , L A2 , L B1 , L B2 ) is illuminated.
2. The lighting device according to claim 1, characterized in that The second light source (13) is arranged and / or configured at such a distance (a) from the first light source (1) that the light (7) emitted by the first light source (1) is incident on the reflector surface (R A11 , R A12 , R A13 , R A2 ) and the light (14) emitted by the second light source (13) is incident on the reflector surface (R A11 , R A12 , R A13 , R A2 ) on the scattered light sections (17, 17').
3. The lighting device according to claim 1 or 2, characterized in that: The second light beam (14) formed by the second light is reflected by the reflector surface (R) at a larger opening angle than the first light beam (7) formed by the first light. A11 , R A12 , R A13 , R A2 )reflection.
4. The lighting device according to claim 3, characterized in that Reflector surface (R A11 , R A12 , R A13 , R A2 ) is designed so that the first light beam (7) does not exceed the wavelength assigned to the reflector surface (R A11 , R A12 , R A13 , R A2 ) of the lens segment (L A1 , L A2 ) is emitted at the edge (16).
5. The lighting device according to any one of claims 1 to 4, characterized in that: Reflector surface (R A11 , R A12 , R A13 , R A2 ) is configured so that a second light beam (14) reflected on the scattered light segment (17, 17') exceeds a reflector surface (R A11 , R A12 , R A13 , R A2 ) of the lens segment (L A1 , L A2 ) is emitted at an edge (16), wherein a further reflector surface (R B1 , R B2 ) of the other lens segments (L B1 , L B2 ) is illuminated, the other reflector surface is illuminated by another first light source (1) for generating another light distribution; and a control mechanism is provided so that the reflector surface (R A11 , R A12 , R A13 , R A2 ) is also switched on in the following case, namely, on the one hand, the second light source (13) assigned to the reflector surface (R A11 , R A12 , R A13 , R A2 ) for generating the predetermined light distribution, and on the other hand disconnecting the first light source (1) assigned to the further reflector surface (R B1 , R B2 ) for generating the further light distribution.
6. The lighting device according to any one of claims 1 to 5, characterized in that: The reflector (5) is arranged in a light guiding direction between the first light source (1) and the second light source (13) on the one hand and the lens (6) of the optical unit (2) on the other hand.
7. The lighting device according to any one of claims 1 to 6, characterized in that: Reflector surface (R A11 , R A12 , R A13 , R A2 ) is configured such that the light (7) emitted by the first light source (1) is directed toward the lens segment (L) in accordance with the predetermined light distribution. A1 , L A2 ), on which lens section the first light beam (7) is imaged into the front area of the vehicle.
8. The lighting device according to any one of claims 1 to 7, characterized in that: Reflector surface (R A11 , R A12 , R A13 , R A2 ) and the lens (6) are configured so as to produce the predetermined light distribution.
9. The lighting device according to any one of claims 1 to 8, characterized in that The first light source (1) and the second light source (13) are respectively configured as LED light sources positioned on a common circuit board (8).
10. The lighting device according to claim 9, characterized in that The circuit board (8) extends parallel to the optical axis (9) of the lens (6).
11. The lighting device according to any one of claims 1 to 10, characterized in that: There are multiple reflector surfaces (R A11 , R A12 , R A13 , R A2 ) and first light sources (1) respectively assigned to the plurality of reflector surfaces for respectively generating first light beams (7), the first light beams being directed to different lens segments (L) of the lens (6) A1 , L A2 , L B1 , L B2 ) to produce the same light distribution and / or to produce different light distributions.
12. The lighting device according to any one of claims 1 to 11, characterized in that The second light source (13) is assigned to such a reflector surface (R A11 , R A12 , R A13 , R A2 ), which is used on the one hand to generate the predetermined light distribution and on the other hand in combination with a further reflector surface (R B1 , R B2 ) are used to produce other light distributions.
13. The lighting device according to any one of claims 1 to 12, characterized in that: A reflector surface (R) configured for the first light source (1) and the second light source (13) A11 , R A12 , R A13 , R A2 ) and is assigned to the first reflector surface (R A11 , R A12 , R A13 , R A2 ) of the lens segment (L A1 , L A2 ) is used to produce the low beam distribution.
14. The lighting device according to any one of claims 1 to 13, characterized in that The reflector surface (R) covers only the light from the first light source (1) B1 , R B2 ) reflects the first light beam (7), the first light beam being configured to the second reflector surface (R B1 , R B2 ) of the lens segment (L B1 , L B2 ) is imaged as a high beam distribution, and the high beam distribution is imaged as a high beam distribution through the first reflector surface (R A11 , R A12 , R A13 , R A2 ) and the lens section (L A1 , L A2 ) produces a superposition of the low beam distribution.
15. The lighting device according to any one of claims 1 to 14, characterized in that Each lens segment (L A1 , L A2 , L B1 , L B2 ) and / or each reflector surface (R A11 , R A12 , R A13 , R A2 , R B1 , R B2 ) are connected to each other in one piece.