Low-beam zone III lighting module, vehicle headlamp and vehicle
11608956 · 2023-03-21
Assignee
Inventors
Cpc classification
F21S41/365
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F21S41/255
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
International classification
Abstract
A low-beam zone III lighting module including a light source, lens, transparent optical element and low-beam zone III formation mechanism are herein. The light source, the formation mechanism, the optical element and the lens are sequentially arranged along a light shape formation light path. The formation mechanism includes one first mirror and one second mirror. The first mirror and the second mirror are on two sides of an optical axis of the lens, and are staggered. The light source is at a first focal point of the first mirror and a second focal point of the first mirror coincides with a first focal point of the second mirror. A second focal point of the second mirror is on a light incident face of the transparent optical element. The lens is directly in front of a light-emitting face of the transparent optical element. A headlamp and vehicle are also herein.
Claims
1. A low-beam zone III lighting module, comprising a light source and a lens, wherein the low-beam zone III lighting module further comprises a transparent optical element and a low-beam zone III forming mechanism; the light source, the low-beam zone III forming mechanism, the transparent optical element and the lens are sequentially arranged along a low-beam zone III light shape forming optical path; and the low-beam zone III forming mechanism comprises at least one first reflector and at least one second reflector, the first reflector and the second reflector are distributed on two sides of an optical axis of the lens and arranged in a staggered manner, the light source is located at a first focal point of the first reflector, a second focal point of the first reflector and a first focal point of the second reflector coincide, a second focal point of the second reflector is arranged on a light incident surface of the transparent optical element, and the lens is located directly in front of a light emergent surface of the transparent optical element.
2. The low-beam zone III lighting module according to claim 1, wherein the transparent optical element comprises the light incident surface, the light emergent surface, an upper surface and a lower surface, and the light incident surface, the upper surface, the lower surface and the light emergent surface define a light channel.
3. The low-beam zone III lighting module according to claim 2, wherein the light incident surface is arranged as a flat surface or a concave or convex cambered surface, the upper surface is arranged as a flat surface or a concave or convex cambered surface, and the light emergent surface is arranged as a cambered surface with a concave middle and two convex ends.
4. The low-beam zone III lighting module according to claim 2, wherein at least one of the light incident surface, the upper surface and the light emergent surface is provided with wrinkles.
5. The low-beam zone III lighting module according to claim 1, wherein the first reflector and the second reflector are configured to be ellipsoidal reflectors.
6. The low-beam zone III lighting module according to claim 1, wherein the low-beam zone III forming mechanism comprises one first reflector and one second reflector, the first reflector and the second reflector are respectively distributed on the two sides of the optical axis of the lens and arranged in a staggered manner, the light source is located at the first focal point of the first reflector, the second focal point of the first reflector and the first focal point of the second reflector coincide, the second focal point of the second reflector is arranged on the light incident surface of the transparent optical element, the lens is located directly in front of the light emergent surface of the transparent optical element, so as to enlarge the width of one side of the low-beam zone III light shape.
7. The low-beam zone III lighting module according to claim 1, wherein the low-beam zone III forming mechanism comprises two first reflectors and two second reflectors, the two first reflectors and the two second reflectors are arranged symmetrically on the two sides of the optical axis of the lens respectively, the second focal point of the first reflector located on one side of the optical axis of the lens and the first focal point of the second reflector located on the other side of the optical axis of the lens coincide, the first focal points of the two first reflectors coincide, the light source is located at the first focal points of the first reflectors, the second focal points of each of the second reflectors is arranged on the light incident surface of the transparent optical element, the lens is located directly in front of the light emergent surface of the transparent optical element, so as to enlarge the widths of two sides of the low-beam zone III light.
8. The low-beam zone III lighting module according to claim 1, wherein further comprising a low-beam reflector, a first focal point of the low-beam reflector is arranged on the light source.
9. The low-beam zone III lighting module according to claim 8, wherein further comprising a radiator, each of the first reflectors, each of the second reflectors and the low-beam reflector are mounted on the radiator or integrally formed with the radiator.
10. A vehicle headlamp comprising the low-beam zone III lighting module according to claim 1.
11. A vehicle comprising the vehicle headlamp according to claim 10.
12. The vehicle headlamp according to claim 10, wherein the transparent optical element comprises the light incident surface, the light emergent surface, an upper surface and a lower surface, and the light incident surface, the upper surface, the lower surface and the light emergent surface define a light channel.
13. The vehicle headlamp according to claim 12, wherein the light incident surface is arranged as a flat surface or a concave or convex cambered surface, the upper surface is arranged as a flat surface or a concave or convex cambered surface, and the light emergent surface is arranged as a cambered surface with a concave middle and two convex ends.
14. The vehicle headlamp according to claim 12, wherein at least one of the light incident surface, the upper surface and the light emergent surface is provided with wrinkles.
15. The vehicle headlamp according to claim 10, wherein the first reflector and the second reflector are configured to be ellipsoidal reflectors.
16. The vehicle headlamp according to claim 10, wherein the low-beam zone III forming mechanism comprises one first reflector and one second reflector, the first reflector and the second reflector are respectively distributed on the two sides of the optical axis of the lens and arranged in a staggered manner, the light source is located at the first focal point of the first reflector, the second focal point of the first reflector and the first focal point of the second reflector coincide, the second focal point of the second reflector is arranged on the light incident surface of the transparent optical element, the lens is located directly in front of the light emergent surface of the transparent optical element, so as to enlarge the width of one side of the low-beam zone III light shape.
17. The vehicle headlamp according to claim 10, wherein the low-beam zone III forming mechanism comprises two first reflectors and two second reflectors, the two first reflectors and the two second reflectors are arranged symmetrically on the two sides of the optical axis of the lens respectively, the second focal point of the first reflector located on one side of the optical axis of the lens and the first focal point of the second reflector located on the other side of the optical axis of the lens coincide, the first focal points of the two first reflectors coincide, the light source is located at the first focal points of the first reflectors, the second focal points of each of the second reflectors is arranged on the light incident surface of the transparent optical element, the lens is located directly in front of the light emergent surface of the transparent optical element, so as to enlarge the widths of two sides of the low-beam zone III light.
18. The vehicle headlamp according to claim 10 further comprising a low-beam reflector, a first focal point of the low-beam reflector is arranged on the light source.
19. The vehicle headlamp according to claim 18 further comprising a radiator, each of the first reflectors, each of the second reflectors and the low-beam reflector are mounted on the radiator or integrally formed with the radiator.
Description
DESCRIPTION OF THE DRAWINGS
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BRIEF DESCRIPTION OF THE SYMBOLS
(13) TABLE-US-00001 1. Light source, 2. Lens, 3. Transparent optical element, 31. Light incident surface, 32. Light emergent surface, 33. Upper surface, 34. Lower surface, 35. Light channel, 4. First reflector, 5. Second reflector, 6. Low-beam reflector, 001. Low-beam light shape, 002. Small angle zone III light shape, 003. Right large angle zone III light shape, 004. Left large angle zone III light shape.
DETAILED DESCRIPTION OF THE EMBODIMENTS
(14) Embodiments of the present disclosure will be described in detail with reference to the accompanying drawings below. It should be understood that the embodiments described herein are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.
(15) The terms “first” and “second” are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined by “first” and “second” may include one or more of the features explicitly or implicitly.
(16) In the description of the present disclosure, it should be noted that unless otherwise clearly specified and limited, the terms “installation” and “arrangement” should be understood in a broad sense, for example, it may be fixed connection, detachable connection, or integrated connection; it may be direct connection or indirect connection through an intermediate medium; it may be internal communication of two elements or the interaction between two elements. For those of ordinary skilled in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.
(17) The technical solutions of the Chinese invention patent filed on Aug. 17, 2016 with the publication number being CN106122870B are not able to expand the width of the zone III light shape because the imaging angle range of the light corresponding to the zone III at the cut-off line structure needs to reach the corresponding width range if the width of the zone III light shape needs to be increased, otherwise a large width cannot be formed after projection through the lens, and the zone III light shape reflected by a secondary reflector in the above technical solution is emitted into the zone III forming structure on the condenser directly from the rear, so that the angle of incident light is limited to a certain small angle range, in addition, the zone III forming structure extends from back to front to the concave light emergent surface arranged at the focal point of the lens, the zone III light shape is basically focused on the middle position of the optical axis to transmit, the expandable angular range is limited, the left-and-right expansion of the light is further limited by the light emergent surface of the concave structure, light emitted into the lens cannot have a wider angular range, and the width of the formed zone III is narrow in the left-right direction.
(18) It should be firstly noted that to facilitate understanding, as shown in
(19) Referring to
(20) The low-beam zone III forming mechanism includes at least one first reflector 4 and at least one second reflector 5, the first reflector 4 and the second reflector 5 are distributed on the two sides of the optical axis of the lens 2 and arranged in a staggered manner, that is, each first reflector 4 is located in front of the corresponding second reflector 5, the second reflector 5 is located behind the transparent optical element 3, the light source 1 is located in the first focal point of the first reflector 4, the second focal point of the first reflector 4 coincides with the first focal point of the second reflector 5, and the second focal point of the second reflector 5 is arranged on the light incident surface 31 of the transparent optical element 3, so that the second reflector 5 is located behind the light incident surface 31 of the transparent optical element 3, and the lens 2 is located directly in front of the light emergent surface 32 of the transparent optical element 3.
(21) It should be noted that the light source 1 is located at the first focal point of the first reflector 4, the second focal point of the first reflector 4 coincides with the first focal point of the second reflector 5, and the second focal point of the second reflector 5 is arranged on the light incident surface 31 of the transparent optical element 3; the reason why the corresponding optical elements are arranged at the focal points is to efficiently use the energy of light, the light at the focal point is most concentrated, that is, in the above technical solutions, it is not indicated that the corresponding optical elements are strictly coincident with the focal points, and a small amount of deviation may be allowed to adjust a lighting light shape and intensity, and the small amount of deviation refers to a distance deviation in the millimeter level, specifically, the small amount of deviation is generally within 5 mm.
(22) It is understandable that there are at least two kinds of low-beam zone III forming mechanisms, one is to include only a first reflector 4 and a second reflector 5, and thus the width on one side of the low-beam zone III light shape can be enlarged; the other is to include two first reflectors 4 and two second reflectors 5, and thus the width of the two sides of the low-beam zone III light shape can be enlarged; in addition, the first reflector 4 and the corresponding second reflector 5 can be arranged facing each other, that is, reflecting surface of the first reflector 4 and reflecting surface of the corresponding second reflector 5 are arranged facing each other, in this way, the light received by the reflecting surface of the first reflector 4 is reflected and then can be emitted to the reflecting surface of the second reflector 5 through the first focal point of the corresponding second reflector 5, and finally a large-angle, wide-range low-beam zone III light shape is formed.
(23) In the above technical solutions, the light emitted by the light source 1 is firstly reflected by the first reflector 4 and emitted from the second focal point of the first reflector 4, since the second focal point of the first reflector 4 and the first focal point of the second reflector 5 coincide, the light is reflected by the second reflector 5 and emitted from the second focal point of the second reflector 5, and the second focal point of the second reflector 5 is arranged on the light incident surface 31 of the transparent optical element 3, so that the light is emitted into the transparent optical element 3, then emitted through the light emergent surface 32 of the transparent optical element 3, and finally emitted through the lens 2 to form a low-beam zone III light shape, wherein due to the relative optical position relationship between the first reflector 4 and the second reflector 5 and in combination with the optical position relationship between the second reflector 5 and the transparent optical element 3, the transmission direction of the light emitted through the lens 2 changes by a certain large angle on the left side or the right side or both sides, so that the illumination range of the low-beam zone III light shape is enlarged on the left side or the right side or both sides, that is, the width of the low-beam zone III light shape is enlarged. Referring to
(24) Referring to
(25) In a preferred embodiment, at least one of the light incident surface 31, the upper surface 33 and the light emergent surface 32 is provided with wrinkles. Wherein, the wrinkles are of an irregularly-shaped granular microstructure, and is configured to produce diffuse reflection of light, reduce the energy of light irradiating on the effective area and adjust the lighting intensity of the low-beam zone III so as to meet the regulatory requirements (general regulations require the maximum lighting intensity of the zone III to be lower than 625 cd) of headlights.
(26) In a specific embodiment, the first reflector 4 and the second reflector 5 are configured as ellipsoidal reflectors. It is understandable that in specific embodiments, the characteristics of the ellipsoidal reflector are mainly used: light emitted from or passing through any focal point is converged to another focal point after passing through the ellipsoidal reflector; moreover, those skilled in the art should be conceivable that the first reflector 4 and the second reflector 5 can also adopt vehicle light reflectors capable of realizing the above functions in the prior art, such as bifocal parabolic reflectors, as long as light emitted from or passing through any one of the focal points of the reflector is converged to the other focal point after passing through the reflector. Referring to
(27) Referring to
(28) Typically, a radiator may also be included, thus, each of the first reflectors 4, each of the second reflectors 5 and the low-beam reflector 6 may be mounted on the radiator, or be integrally formed with the radiator, and production and assembly are facilitated.
(29) Referring to
(30) Referring to
(31) Light emitted by the light source 1 is firstly reflected by the first reflector 4 and emitted from the second focal point of the first reflector 4, since the second focal point of the first reflector 4 coincides with the first focal point of the second reflector 5, the light is then reflected by the second reflector 5 and emitted from the second focal point of the second reflector 5, the second focal point of the second reflector 5 is arranged on the light incident surface 31 of the transparent optical element 3, thus, the light is emitted into the transparent optical element 3, a part of the light is reflected by the upper surface 33 and then irradiated to the light emergent surface 32, another part of the light is directly irradiated to the light emergent surface 32 through the light channel 35, and the light is emitted through the light emergent surface 32 of the transparent optical element 3 and finally emitted through the lens 2 to form the low-beam zone III light shape; due to the relative optical position relationship between the first reflector 4 and the second reflector 5 and in combination with the optical position relationship between the second reflector 5 and the transparent optical element 3, the transmission direction of the light emitted through the lens 2 is changed by a certain large angle on the left side or the right side or both sides, so that the lighting range of the low-beam zone III light shape on the left side or the right side or both sides is enlarged, that is, the width of the low-beam zone III light shape is increased; wherein one or more surfaces of the light incident surface 31, the upper surface 33 and the light emergent surface 32 are provided with wrinkles, the characteristic of producing diffuse reflection on light by the wrinkles is utilized, the lighting intensity of the low-beam zone III can be adjusted, the energy of light irradiated on the effective area is reduced, and the regulatory requirements of vehicle lights are met; and in addition, the low-beam reflector 6 can be arranged, the first focal point of the low-beam reflector 6 is located on the light source 1, in this way, the light reflected by the low-beam reflector 6 can emit to form a low-beam light pattern 001.
(32) It should be noted that, as shown in
(33) The embodiments of the vehicle headlamp of the present disclosure may be provided with the low-beam zone III lighting module described in any one of the above embodiments, namely all the technical solutions of all the above embodiments of the low-beam zone III lighting module are adopted, so that the vehicle headlamp at least has all the beneficial effects brought by the technical solutions of the embodiments of the above low-beam zone III lighting module; and the low-beam zone III lighting module and the vehicle headlamp of the present disclosure are particularly applicable to low-beam zone III lighting of AFS headlights.
(34) When the low-beam zone III lighting module is applied to the vehicle headlamp, the first reflector 4, the second reflector 5 and the low-beam reflector 6 can be integrally formed with the radiator, so that production and assembly are facilitated.
(35) Further, the low-beam zone III lighting module of the present disclosure is applied to an AFS vehicle headlamp, so that when a vehicle turns, good zone III lighting within the turning range can still be achieved while a low-beam cut-off part shifts left and right and a zone III lightshape does not shift.
(36) A vehicle of the present disclosure may be provided with the vehicle headlamp described in the above embodiments, and at least has all the beneficial effects brought by the technical solutions of the above embodiments of the vehicle headlamp.
(37) It should be understood that the above vehicle headlamp is applied to the vehicle, that is, the low-beam zone III lighting module of the present disclosure is applied to the vehicle, especially a headlight with AFS functions; and when the vehicle turns, good zone III lighting within the turning range can still be achieved while the low-beam cut-off part shift left and right and the zone III light shape does not shift, and thus a driver can better obtain road surface information such as signs.
(38) In the description of the present disclosure, the description with reference to the terms “specific embodiments”, “preferred embodiments”, “a preferred embodiment” and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present disclosure. In the present disclosure, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.
(39) The preferred implementations of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited thereto. Within the scope of the technical idea of the present disclosure, a variety of simple modifications can be made to the technical solutions of the present disclosure, including the combination of individual specific technical features in any suitable manner. In order to avoid unnecessary repetition, various possible combination ways are not described separately in the present disclosure. However, the simple modifications and combinations should also be regarded as the content disclosed by the present disclosure, and all fall within the protection scope of the present disclosure.