Low beam III zone lighting module, vehicle headlights and vehicle

Abstract

A low beam illumination module for the low beam zone III, comprising a light source (1) and a lens (2), further comprising a transparent optical element (3) and a low beam generating mechanism for the low beam zone III, wherein the light source (1), the low beam generating mechanism for the low beam zone III, the transparent optical element (3) and the lens (2) are arranged one behind the other along the light path of the light forming the light shape of the low beam zone III, wherein the low beam generation mechanism for the low beam zone III comprises only a first reflector (4) and only a second reflector (5), and the first reflector (4) and the second reflector (5) are arranged on two sides of the optical axis of the lens (2) and offset from one another, wherein the light source (1) is located at a first focal point of the first reflector (4), wherein a second focal point of the first reflector (4) overlaps with a first focal point of the second reflector (5), and a second focal point of the second reflector (5) is arranged at a light entry surface (31) of the transparent optical element (3), and wherein the lens (2) is located directly in front of a light exit surface (32) of the transparent optical element (3), characterized in that the first reflector (4) is arranged in front of the transparent optical element (3) and the second reflector (5) is arranged behind the transparent optical element (3) in order to increase the width of one side of the light shape of the low beam zone III.

Description

FIELD OF THE INVENTION

[0001] The present invention relates to a vehicle light illumination module, specifically a low beam illumination module for the low beam zone III, as well as a vehicle headlight and a vehicle. STATE OF THE ART

[0002] In the field of automotive lighting, transparent optical elements have been increasingly used in low beams or high beams and other automotive headlight lighting devices in recent years, compared to traditional optical elements that only feature a reflector with an aluminum-coated surface. In particular, optical elements with a light channel of a specific length are finding increasingly widespread use in low beams or high beams and other automotive headlight lighting devices thanks to their advantages such as high luminous efficacy, simple system design, and low system costs, thus representing a development trend in headlight lighting devices.

[0003] CN 1 06 122 870 B discloses a low-beam lighting module that allows the light pattern of low-beam zone III to be slightly broadened with little effort. This means that low-beam zone III illuminates a larger area in the driver's field of vision, thereby improving visibility when driving in the dark. DE 60 2005 001 638 T2 relates to a motor vehicle headlight with a main reflector and several partial reflectors. The main reflector is illuminated by a light source and reflects part of the light as a low-beam pattern.

[0004] A vehicle's low beam is used for short-range illumination. As stated in vehicle lighting standards (e.g., the Chinese standard GB25991), low beam zone III represents an important component of a low beam pattern. It is located above the cut-off line and is primarily used to illuminate traffic signs and other objects on the road surface, allowing the driver to familiarize themselves with the signs and other information.

[0005] For high beams intended to incorporate AFS (Adaptive Front Lighting System) functionality, a low beam Zone III light pattern with a narrow left-right beam (e.g., ±10°) cannot meet the standard requirements or practical application needs. AFS enables continuous, dynamic adjustment of the headlight beam depending on the steering wheel angle, the vehicle's tilt angle, and the vehicle's speed, allowing adjustment to the current steering angle and ensuring the beam direction matches the vehicle's current direction of travel. This ensures optimal illumination of the road ahead and optimal visibility for the driver.This significantly improves safety when driving in the dark. In cases of insufficient road surface illumination and on roads with numerous curves, the driver's field of vision can be expanded and an early warning of oncoming traffic can be provided. In a design for implementing a headlight with an AFS function, the light pattern of the low beam light-dark area is shifted to the left and right, while the light pattern of low beam zone III remains unchanged. This requires that low beam zone III have a sufficient width in the left-right direction. (1) As with the Chinese AFS standard GB T30036, low beam zone III contains two test points, namely BLL and BRR, where BLL covers the angular range of -8° to -20° on the left side and BRR covers the angular range of +8° to +20° on the right side.so that the light shape of the low beam zone III must cover at least ±20° to the left and right, (2) when the vehicle is steered left and right, the light shape of the low beam cut-off area of ​​an AFS headlamp is shifted by a certain angle (for example, 10°) in the corresponding turning direction, in which case, to meet the requirement of the AFS standard, the light shape of the low beam zone III must cover a certain width if the light shape of the low beam zone III is not shifted (when turning the AFS by 10°, the light shape of the low beam zone III must cover an angular range of 30° to meet the standard requirement), (3) from the point of view of practical application, the light shape of the low beam zone III should also have a sufficient width,to enable illumination with a sufficient width for the area above the cut-off line of the dipped beam and sufficient illumination of the dipped beam zone III when the vehicle is in AFS mode, thus increasing the visibility of the road information for drivers.

[0006] In the prior art, in a low-beam lighting device using a transparent optical element with a light channel of a specific length, a corresponding low-beam zone III generation structure is provided on the optical element to generate the low-beam zone III. However, this does not effectively increase the width of the light shape of the low-beam zone III. For example, the Chinese patent application filed on 17August 2016 and the publication number of CN 1 06 122 870 B, an LED light source vehicle lamp module with integrated high beam and low beam, in which the following configuration is used to generate the low beam zone III: A secondary reflector is provided and a portion of light reflected by the secondary reflector exits a lens after reflection and refraction at a condenser (namely a transparent optical element) and forms a low beam zone III. The low beam zone III generation structure located on the condenser is arranged above the condenser body and receives the light reflected by a reflector arranged behind an LED light source. The light passes through the low beam zone III generation structure, exits via a light exit surface and enters the lens, finally generating a light shape of the low beam zone III.The light shape of the low beam zone III thus generated has a width of approximately ±10° in the left-right direction, which means that neither the lighting requirement for the low beam zone III when a vehicle is turning nor the requirement of the ASF standard for vehicle headlights can be met.

[0007] In this field, a new design is urgently needed to solve the above problem of the narrow angle of the illuminated area of ​​the low beam zone III in the left-right direction in the prior art. DISCLOSURE OF THE INVENTION

[0008] According to a first aspect, the present invention is based on the object of providing a low beam lighting module for the low beam zone III, hereinafter also called low beam lighting module for the low beam zone III, with which the width of the light shape of the low beam zone III can be effectively increased.

[0009] According to a second aspect, the present invention is based on the object of providing a vehicle headlight with which not only the width of the light shape of the low beam zone III can be effectively increased, but also the standard requirement of the adaptive front lighting system of the vehicle and the need for practical application can be met.

[0010] According to a third aspect, the object of the present invention is to provide a vehicle in which good illumination of the low beam zone III can still be provided for a turning area when, when turning, the low beam light-dark area is shifted to the left or right and the light shape of the low beam zone III, however, is not shifted.

[0011] The object is achieved according to the first aspect of the present invention by a low beam illumination module for the low beam zone III, which comprises a light source and a lens, as well as a transparent optical element and a low beam generation mechanism for the low beam zone III, hereinafter also referred to as the low beam generation mechanism for the low beam zone III, wherein the light source, the low beam generation mechanism for the low beam zone III, the transparent optical element and the lens are arranged one behind the other along the light path of the light forming the light shape of the low beam zone III, wherein the low beam generation mechanism for the low beam zone III comprises at least one first reflector and at least one second reflector, and the first reflector and the second reflector are arranged on two sides of the optical axis of the lens and offset from one another,wherein the light source is located at a first focal point of the first reflector, wherein a second focal point of the first reflector overlaps with a first focal point of the second reflector, and a second focal point of the second reflector is arranged at a light entry surface of the transparent optical element, wherein the lens is located directly in front of a light exit surface of the transparent optical element, and wherein the first reflector is arranged in front of the transparent optical element and the second reflector is arranged behind the transparent optical element.

[0012] Preferably, the transparent optical element comprises the light entry surface, the light exit surface, an upper surface and a lower surface, wherein the light entry surface, the upper surface, the lower surface and the light exit surface enclose a light channel.

[0013] Furthermore, it is provided that the light entry surface is designed as a flat surface or concave or convex arc surface, the upper surface as a flat surface or concave or convex arc surface and the light exit surface as an arc surface which is convex at two ends and concave in the middle.

[0014] Preferably, a fold or crumpled structure is provided on the surface of at least one of the components: light entry surface, upper surface and light exit surface.

[0015] Typically, the first reflector and the second reflector are designed as ellipsoidal reflectors.

[0016] Specifically, it is preferably provided that the low beam generating mechanism for the low beam zone III comprises a first reflector and a second reflector, and the first reflector and the second reflector are arranged on two sides of the optical axis of the lens and offset from one another, wherein the light source is located at a first focal point of the first reflector, wherein a second focal point of the first reflector overlaps with a first focal point of the second reflector, and a second focal point of the second reflector is arranged at a light entry surface of the transparent optical element, and wherein the lens is located immediately in front of a light exit surface of the transparent optical element in order to be able to increase the width of one side of the light shape of the low beam zone III.

[0017] Specifically, it is preferably provided that the low beam generation mechanism for the low beam zone III comprises two first reflectors and two second reflectors, and the two first reflectors and the two second reflectors are each arranged symmetrically on two sides of the optical axis of the lens, wherein a second focal point of the first reflector located on one side of the optical axis of the lens overlaps with a first focal point of the second reflector located on the other side of the optical axis of the lens, and the first focal points of the two first reflectors overlap with one another, wherein the light source is located at the first focal points of the first reflectors, wherein the second focal points of the second reflectors are each arranged on a light entry surface of the transparent optical element, and wherein the lens is located directly in front of a light exit surface of the transparent optical element,in order to increase the width of the light shape of the low beam zone III on both sides.

[0018] Typically, the module further comprises a low beam reflector whose first focal point is arranged at the light source.

[0019] Typically, the module further comprises a radiator, wherein the single first reflector, the single second reflector and the low beam reflector are arranged on the radiator or formed integrally therewith.

[0020] According to a second aspect of the present invention, the object is achieved by a vehicle headlight which comprises a low-beam lighting module for the low-beam zone III according to one of the embodiments of the first aspect.

[0021] According to a third aspect of the present invention, the object is achieved by a vehicle comprising a vehicle headlight according to the embodiment of the second aspect.

[0022] With the above configuration, the following advantageous effects of the present invention are achieved: In a basic embodiment of the present invention, the light emitted by a light source enters the optical element after being reflected by the first reflector and the second reflector in sequence, and then exits via the light exit surface and the lens of the transparent optical element. Since the first reflector and the second reflector are arranged on two sides of the optical axis of the lens and offset from one another, a large-angle change in the propagation direction of the light exiting via the lens in the left-right direction is caused compared to the prior art, so that the illumination range of the light shape of the low beam zone III is expanded in the left-right direction and thus the width of the light shape of the low beam zone III is increased.

[0023] The light entrance surface of the transparent optical element can be designed as a flat surface or a concave or convex curved surface. With a curved surface, light can be spread out. The upper surface can also be designed as a flat surface or concave or convex in order to be able to reflect the light entering via the light entrance surface. In particular, the light exit surface of the transparent optical element is designed as an curved surface that is convex at two ends and concave in the middle, thus achieving better dispersion of the light exiting from the light exit surface of the transparent optical element on the outer side in terms of its angle. This contributes to the creation of a light shape for the low beam zone III with a large angle and wide circumference.

[0024] Furthermore, a pleated or crinkled structure may be provided on the surface of at least one of the components (light entry surface, upper surface, and light exit surface). This serves to diffusely reflect the light, thereby reducing the energy of the light radiated to an effective area and thus adjusting the illuminance of low-beam zone III to meet the standard requirements for vehicle lamps. As a general rule, the maximum illuminance of low-beam zone III should be less than 625 cd (candelas), which corresponds to an illuminance of 1 lx (lux) for a light test screen positioned 25 m in front of the vehicle.

[0025] By using the low beam lighting module according to the invention for the low beam zone III in a vehicle headlight, in particular an AFS headlight, it is possible to still provide good illumination of the low beam zone III for a turning area when, when a vehicle turns, the low beam light-dark area is shifted to the left or right and the light shape of the low beam zone III, however, is not shifted.

[0026] Further advantages of the present invention and the effect of the preferred embodiments can be seen from the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Showing: Fig. 1 a schematic representation of a dipped beam shape according to the prior art, Fig. 2 a three-dimensional structural schematic representation of an embodiment of the present invention, Fig. 3 is another three-dimensional structural schematic representation of an embodiment of the present invention, Fig. 4 a three-dimensional structural schematic representation of a non-claimed embodiment of a low beam lighting module, Fig. 5 a three-dimensional structural schematic representation of a non-claimed embodiment of a low beam lighting module, Fig. 6 a side view of the structure according to Fig. 4, Fig. 7 a plan view of the structure according to Fig. 4, Fig. 8 is a three-dimensional structural schematic representation of the transparent optical element according to the present invention, Fig. 9 is another three-dimensional structural schematic representation of the transparent optical element according to the present invention, Fig. 10 schematically shows the light path and the light shape according to an embodiment of the present invention, Fig. 11 a three-dimensional structural schematic representation of a non-claimed embodiment of a low beam lighting module, Fig. 12 schematically shows the light path and the light shape according to Fig. 11. Description of reference symbols: 1 light source 2 lenses 3 transparent optical element 31 Light entry surface 32 light exit surface 33 upper surface 34 lower surface 35 light channels 4 first reflector 5 second reflector 6 Low beam reflector 001 Low beam shape 002 Small angle light shape for low beam zone III 003 Large angle light pattern for low beam zone III on the right side 004 Large angle light pattern for low beam zone III on the left side EMBODIMENTS OF THE INVENTION

[0028] The following describes specific embodiments of the present invention in more detail with reference to the accompanying drawings. It should be understood that the specific embodiments described serve only to describe and explain the present invention without limiting it.

[0029] The terms "first" and "second" are not intended to be understood as an implicit or explicit reference to the relative importance or number of the characteristic in question. Instead, they serve merely as a descriptive element. Therefore, for characteristics that are further defined by "first" and "second," one can implicitly or explicitly assume that one or more of the described characteristics are included.

[0030] When describing the present invention, the terms "attach," "provide," or the like, unless expressly stated otherwise, should be understood in a broad sense. For example, it can refer to a fixed, detachable, or one-piece connection, as well as a direct connection, an indirect connection established via an intermediate piece, an internal connection between two elements, or a mutual interaction between two elements. Those of ordinary skill in the art can use the facts of the case to determine the intended meaning of the terms used in the present invention.

[0031] With the design of the Chinese patent specification with the filing date of 17.

[0032] August 2016 and the publication number of CN 1 06 122 870 B, the width of the light shape of the low beam zone III cannot be increased because, in order to increase the width of the light shape, the imaging angular range of the light assigned to the low beam zone III at the cut-off point must reach a corresponding width range. Otherwise, a large angle cannot be generated after projection through the lens. In this embodiment, the light shape of the low beam zone III reflected by the secondary reflector radiates directly from behind into a generation structure of the low beam zone III arranged on the condenser, so that the angle of the incident light is limited to a small angular range.Furthermore, the low beam zone III generation structure extends from the rear to the front and is arranged on a concave light-emitting surface at the focal point of the lens. The light shape of the low beam zone III is generally concentrated at the center of the optical axis, thus limiting the expandable angular range. The light-emitting surface of the concave structure further restricts the expansion of light in the left-right direction, so that the light entering the lens cannot generate a wide angular range, and thus the generated low beam zone III has a narrow width in the left-right direction.

[0033] First of all, it should be noted that for a better understanding with regard to the optical axis of the lens 2, as can be seen from Fig. 2, the side from which light emerges is defined as "front", the side into which light enters is defined as "rear", the left side along the light exit direction is defined as "left", the right side along the light exit direction is defined as "right", the upper side along the light exit direction is defined as "top" and the lower side along the light exit direction is defined as "bottom". It is understood that such terms are used in relation to the orientation or position shown in the respective illustration in order to merely describe the invention and, if necessary, to simplify the description. In other words, these terms do not imply or explicitly the positioning, design and operation of the device or element in question in a predetermined position, so that there is no limitation of the invention here either.

[0034] As from Fig. As can be seen from Figures 2 to 12, a basic embodiment of the low-beam illumination module comprises a light source 1, a lens 2, a transparent optical element 3, and a low-beam generation mechanism for the low-beam zone III. The light source 1, the low-beam generation mechanism for the low-beam zone III, the transparent optical element 3, and the lens 2 are arranged one behind the other along the light path of the light forming the light shape of the low-beam zone III.

[0035] The low beam generation mechanism for the low beam zone III comprises at least a first reflector 4 and at least one second reflector 5. The first reflector 4 and the second reflector 5 are arranged on two sides of the optical axis of the lens 2 and offset from one another. In other words, the first reflector 4 is arranged in front of an associated second reflector 5, and the second reflector 5 is arranged behind the transparent optical element 3. The light source 1 is located at a first focal point of the first reflector 4, wherein a second focal point of the first reflector 4 overlaps with a first focal point of the second reflector 5, and a second focal point of the second reflector 5 is arranged at a light entry surface 31 of the transparent optical element 3, so that the second reflector 5 is located behind the light entry surface 31 of the transparent optical element 3.The lens 2 is located directly in front of a light exit surface 32 of the transparent optical element 3.

[0036] 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 overlaps 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 entry surface 31 of the transparent optical element 3. The arrangement of the associated optical element at the focal point aims at efficient utilization of the light energy, since light is largely concentrated at the focal point. In other words, with the above embodiment, the associated optical element does not have to exactly overlap with the focal point, and a slight deviation is permissible in order to adapt the illumination light shape and intensity. A slight deviation means a distance deviation in the millimeter range. Specifically, a slight deviation is generally less than 5 mm.

[0037] It is understood that two designs are conceivable for the low beam generation mechanism for low beam zone III. In one design, it comprises a first reflector 4 and a second reflector 5, so that the width of the light shape of low beam zone III can be increased on one side. In the other design, it comprises two first reflectors 4 and two second reflectors 5, whereby the width of the light shape of low beam zone III can be increased on both sides. In addition, the first reflector 4 and the associated second reflector 5 can be arranged facing one another, in other words, the reflection surface of the first reflector 4 and the reflection surface of the second reflector 5 are arranged facing one another, whereby light, after being reflected by the reflection surface of the first reflector 4, can radiate via the first focal point of the associated second reflector 5 to the reflection surface of the second reflector 5.This ultimately creates a low beam zone III light shape with a large angle and wide range.

[0038] In the above configuration, the light emitted by the light source 1 is first reflected by the first reflector 4 and exits via the second focal point of the first reflector 4. Since the second focal point of the first reflector 4 overlaps with the first focal point of the second reflector 5, the light is then reflected by the second reflector 5 and exits via the second focal point of the second reflector 5. The second focal point of the second reflector 5 is arranged at the light entrance surface 31 of the transparent optical element 3, which is why light enters the transparent optical element 3, then exits via the light exit surface 32 of the transparent optical element 3, and finally exits the lens 2, thus generating a light shape of the low beam zone III.The relative optical positional relationship between the first reflector 4 and the second reflector 5 in conjunction with the optical positional relationship between the second reflector 5 and the transparent optical element 3 causes the light emerging from the lens 2 to experience a large-angle change in the propagation direction on one side or on both sides in the left-right direction, so that the illumination area of ​​the light shape of the low beam zone III is enlarged on one side or on both sides in the left-right direction and thus the width of the light shape of the low beam zone III is increased.

[0039] As can be seen from Fig. 2 to 9, in a specific embodiment of a low-beam lighting module, the transparent optical element 3 comprises the light entry surface 31, the light exit surface 32, an upper surface 33, and a lower surface 34. The light entry surface 31, the upper surface 33, the lower surface 34, and the light exit surface 32 enclose a light channel 35. The transparent optical element 3 is made of a transparent material and is characterized by high luminous efficacy, thus enabling a simple system structure and low system costs.

[0040] As from Fig. As can be seen from Figures 2 to 9, in one embodiment of a low-beam illumination module, the light entrance surface 31 can be configured as a flat surface or a concave or convex arc surface to diffuse light. The upper surface 33 is configured as a flat surface or a concave or convex arc surface to reflect the light entering via the light entrance surface 31. Those skilled in the art can select the shape of the light entrance surface 31 and the upper surface 33 according to design needs. The light exit surface 32 is configured as an arc surface that is convex at two ends and concave in the center, thus achieving better angular dispersion of the light exiting from the light exit surface 32 of the transparent optical element 3 on the outer side. This contributes to wide-angle, wide-area illumination of the low-beam zone III.

[0041] In a preferred embodiment, a pleated or crinkled structure is provided on the surface of at least one of the components: light entry surface 31, upper surface 33, and light exit surface 32. The pleated or crinkled structure is a granular microstructure with an irregular shape that serves to diffusely reflect light, thereby reducing the energy of the light radiating to an effective area and thus adjusting the illuminance of low-beam zone III to meet the standard requirement for vehicle lamps. (As a rule, it is specified that the maximum illuminance of low-beam zone III should be less than 625 cd.)

[0042] In a specific embodiment, the first reflector 4 and the second reflector 5 are designed as ellipsoidal reflectors. It is understood that in a specific embodiment, the feature of an ellipsoidal reflector is primarily used, in which the light emitted from any focal point or passing through this focal point is collected by the ellipsoidal reflector at another focal point. Furthermore, it should be obvious to those skilled in the art that, with the first reflector 4 and the second reflector 5, a vehicle light reflector with the above function, for example, a bifocal parabolic reflector, can also be realized using a prior art design, provided that the light emitted from any focal point or passing through this focal point is collected by the reflector at another focal point.

[0043] As can be seen from Fig. 2 to 10, in one embodiment of a low-beam lighting module, it is provided that the low-beam generation mechanism for the low-beam zone III can comprise a first reflector 4 and a second reflector 5, and the first reflector 4 and the second reflector 5 are arranged on two sides of the optical axis of the lens 2 and offset from one another. In other words, the first reflector 4 is arranged in front of the second reflector 5 and the second reflector 5 is arranged behind the transparent optical element 3. 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 overlaps 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 entry surface 31 of the transparent optical element 3.The lens 2 is located directly in front of the light exit surface 32 of the transparent optical element 3, so that the light emitted by the light source 1 passes through a light path consisting of the first reflector 4, the second reflector 5 and the transparent optical element 3 in order to increase the width of one side of the light shape of the low beam zone III.

[0044] As from Fig. 11 and Fig. As can be seen from Figure 12, in one exemplary embodiment of a low-beam lighting module, it is provided that the low-beam generation mechanism for the low-beam zone III can comprise two first reflectors 4 and two second reflectors 5, and the two first reflectors 4 and the two second reflectors 5 are each arranged symmetrically on two sides of the optical axis of the lens 2, wherein the second focal point of the first reflector 4 located on one side of the optical axis of the lens 2 overlaps with the first focal point of the second reflector 5 located on the other side of the optical axis of the lens 2, the first reflector 4 is located in front of the associated second reflector 5, and the first focal points of the two first reflectors 4 overlap with one another. The light source 1 is located at the first focal points of the first reflectors 4.The second focal points of the second reflectors 5 are each arranged on a light entrance surface 31 of the transparent optical element 3, wherein the lens 2 is located immediately in front of the light exit surface 32 of the transparent optical element 3, so that the light emitted by the light source 1 passes through a light path consisting of the first reflectors 4, the second reflectors 5 and the transparent optical element 3 and exits from the lens 2, whereby a light shape of the low beam zone III with a large angle and a wide range in the left-right direction is achieved in order to increase the bilateral width of the light shape of the low beam zone III.

[0045] As can be seen from Fig. 2, 3 and 10 to 12, it is generally possible for an average person skilled in the art to use the above configuration to design an optical module which serves for illuminating a vehicle headlight and which has the dipped beam main light shape according to Fig. 2, Fig. 3 and Fig. 11. Specifically, in the above embodiment, a low-beam reflector 6 can be provided, the first focal point of which is arranged at the light source 1. Thus, a low-beam shape 001 and a light shape of the low-beam zone III with a large angle and a wide range can be achieved simultaneously. Furthermore, a cut-off line generation structure can be arranged directly at the upper boundary of the light exit surface 32 of the transparent optical element 3, whereby a low-beam shape 001 with a cut-off line can be generated. It is understood that other methods for generating a cut-off line can be used.

[0046] Typically, the module may further comprise a radiator, wherein the single first reflector 4, the single second reflector 5 and the low beam reflector 6 may be arranged on the radiator or formed integrally therewith, thereby facilitating manufacture and assembly.

[0047] It will be Fig. 2 to 12. The low-beam illumination module for low-beam zone III according to one exemplary embodiment of a low-beam illumination module comprises a light source 1, a lens 2, a transparent optical element 3, and a low-beam generation mechanism for low-beam zone III. The light source 1, the low-beam generation mechanism for low-beam zone III, the transparent optical element 3, and the lens 2 are arranged one behind the other along the light path of the light forming the light shape of low-beam zone III. The low-beam generation mechanism for low-beam zone III comprises at least one first reflector 4 and at least one second reflector 5. It is understood that at least two configurations for the low-beam generation mechanism for low-beam zone III are conceivable. In one configuration, it comprises only one first reflector 4 and one second reflector 5.The first reflector 4 and the second reflector 5 are arranged on two sides of the optical axis of the lens 2 and offset from one another, with the first reflector 4 thus being located in front of the associated second reflector 5. 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 overlaps 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 entry surface 31 of the transparent optical element 3. The lens 2 is located directly in front of the light exit surface 32 of the transparent optical element 3. Alternatively, the low beam generation mechanism for the low beam zone III comprises two first reflectors 4 and two second reflectors 5, and the two first reflectors 4 and the two second reflectors 5 are each arranged symmetrically on two sides of the optical axis of the lens 2.The second focal point of the first reflector 4 located on one side of the optical axis of the lens 2 overlaps with the first focal point of the second reflector 5 located on the other side of the optical axis of the lens 2. The first reflector 4 is located in front of the associated second reflector 5. The first focal points of the two first reflectors 4 overlap with each other, with the light source 1 located at the first focal point of the first reflector 4, and the second focal point of the single second reflector 5 being arranged on the light entrance surface 31 of the transparent optical element 3. Thus, the first reflector 4, the second reflector 5, and the transparent optical element 3 can generate the light path of a light shape of the low beam zone III with a large angle and a wide range, thereby increasing the width of the light shape of the low beam zone III in the left-right direction.The first reflector 4 and the second reflector 5 can be designed as ellipsoidal reflectors. Furthermore, the light entry surface 31 of the transparent optical element 3 can be designed as a flat surface or a concave or convex arc surface, which can spread light. The upper surface 33 can also be designed as a flat surface or a concave or convex arc surface in order to be able to reflect the light entering via the light entry surface 31. The light exit surface 32 can be designed as an arc surface that is convex at two ends and concave in the middle, thus achieving better dispersion of the light exiting from the light exit surface 32 of the transparent optical element 3 on the outer side in terms of its angle. This contributes to generating a light shape of the low beam zone III with a large angle and a wide circumference.Furthermore, a pleated or crumpled structure can be provided on the surface of at least one of the components: light entry surface 31, upper surface 33, and light exit surface 32. By means of the diffuse reflection of the light by the pleated or crumpled structure, the energy of the light radiating to an effective area is reduced, and thus the illuminance of the low-beam zone III is adjusted in order to meet the standard requirement for vehicle lights. In addition, in combination with technical means in this field, a low-beam reflector 6 and a cooler can also be provided. With the low-beam reflector 6, the module can produce a low-beam shape 001. Depending on design requirements, the cooler can be removably mounted together with the first reflector 4, the second reflector 5, and the low-beam reflector 6, or formed integrally therewith to facilitate manufacture and assembly.The cooler can be an air cooler, a water cooler, a heat pipe cooler or another type of cooler.

[0048] It will be Fig. 2 to 12, whereby the operating procedure of the low beam lighting module for the low beam zone III is described in more detail below.

[0049] The light emitted by the light source 1 is first reflected by the first reflector 4 and exits via the second focal point of the first reflector 4. Since the second focal point of the first reflector 4 overlaps with the first focal point of the second reflector 5, the light is then reflected by the second reflector 5 and exits via the second focal point of the second reflector 5. The second focal point of the second reflector 5 is arranged at the light entry surface 31 of the transparent optical element 3, which is why light enters the transparent optical element 3, with part of the light radiating onto the light exit surface 32 after reflection at the upper surface 33, while the other part of the light radiates directly onto the light exit surface 32 via the light channel 35. The light exits via the light exit surface 32 of the transparent optical element 3 and finally exits the lens 2, thus generating a light form of the low beam zone III.The relative optical positional relationship between the first reflector 4 and the second reflector 5, in conjunction with the optical positional relationship between the second reflector 5 and the transparent optical element 3, causes the light emerging from the lens 2 to experience a large-angle change in the propagation direction on one side or both sides in the left-right direction, so that the illumination area of ​​the light shape of the low-beam zones III is enlarged on one side or both sides in the left-right direction, and thus the width of the light shape of the low-beam zones III is increased. A pleated or crinkled structure is formed on the surface of at least one of the components: light entry surface 31, upper surface 33, and light exit surface 32.By means of the diffuse reflection of the light by the pleated or crumpled structure, the illuminance of the low-beam zone III can be adjusted and the energy of the light radiating to an effective area can be reduced in order to meet the standard requirements for vehicle lights. Furthermore, a low-beam reflector 6 can be provided, the first focal point of which is arranged at the light source 1. Thus, the light reflected by the low-beam reflector 6 can produce a low-beam shape 001 after exiting.

[0050] It should be noted that the illumination area of ​​the low beam zone III in the prior art, as shown with the light shape of the low beam zone III small angle 002, has an angle of ±10° in the left-right direction, as can be seen from Fig. 1. Compared to the state of the art, the design, as can be seen from Fig. 10 and Fig. 12, enables a light shape of the low beam zone III with a large angle and a wide range. As can be seen from Fig. 10, in one embodiment, a large-angle illumination area of ​​the low beam zone III with 10° on the left side and 30° on the right side is achieved, as with the light shape of the low beam zone III large angle on the right side 003 in Fig. 10. The value indicated in the drawing serves only as an example of a light shape of the low beam zone III with a large angle and a wide range in the left-right direction and does not necessarily have to be exactly 30°. It is understood that other values ​​are possible, for example an angle greater than 30°. Furthermore, a light shape of the low beam zone III with a large angle and a wide range can be used both on the left side and on the right side, as in the embodiment according to Fig. 12, as with the light shape of the low beam zone III large angle on the left side 004 and the light shape of the low beam zone III large angle on the right side 003 in Fig. 12. Furthermore, the angle on the left and right sides does not necessarily have to be the same and can be adjusted according to design requirements. The angle is defined relative to the 0° position, where the VV axis is located. The position of the VV axis is generally known to those skilled in the art; it is an axis that passes through the vertical direction of a reversal point of the low-beam cut-off line.

[0051] The vehicle headlight according to one embodiment may comprise a low-beam illumination module for low-beam zone III according to one of the preceding embodiments, and all configurations of the preceding embodiments for the low-beam illumination module for low-beam zone III are used. Therefore, at least all advantageous effects resulting from the configuration of the preceding embodiments for the low-beam illumination module for low-beam zone III are achieved. The low-beam illumination module for low-beam zone III and the vehicle headlight according to the present invention are particularly suitable for illuminating the low-beam zone III of an AFS headlight.

[0052] When using the low beam lighting module for the low beam zone III in a vehicle headlight, the first reflector 4, the second reflector 5 and the low beam reflector 6 can be formed as one piece with the radiator in order to facilitate manufacture and assembly.

[0053] By using the low beam lighting module according to the invention for the low beam zone III in an AFS vehicle headlight, it is furthermore possible to still provide good illumination of the low beam zone III for a turning area when, when a vehicle turns, the low beam light-dark area is shifted to the left or right and the light shape of the low beam zone III, however, is not shifted.

[0054] The vehicle according to the invention can have a vehicle headlight according to the above embodiment and is thus characterized by at least all advantageous effects resulting from the above configuration for the vehicle headlight.

[0055] It is understood that by using the above vehicle headlight in a vehicle, i.e. by using the low beam lighting module according to the invention for the low beam zone III in a vehicle, in particular in a headlight with AFS function, it is possible to still provide good illumination of the low beam zone III for a turning area when, when a vehicle turns, the low beam light-dark area is shifted to the left or right and the light shape of the low beam zone III, however, is not shifted, so that the driver can easily obtain information about traffic signs and other traffic information.

[0056] In the description of the present invention, the description should be interpreted with reference to the terms "specific embodiments", "preferred embodiments" and "a preferred embodiment" in such a way that specific features, structures, materials or properties explained with reference to the embodiment or example are of at least one embodiment or example of the present invention. In the present invention, the mention of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials or properties can be combined with one another in a suitable manner within the framework of any one or more embodiments or examples.

[0057] So far, preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is in no way limited thereto. Within the scope of the technical concepts of the present invention, various simple variants of the inventive design are conceivable, including a combination of individual concrete features. To avoid unnecessary repetition, a separate description of various possible combinations is omitted. Such simple variants and combinations should also be considered as disclosed content of the present invention and belong to the scope of protection of the invention.

Claims

[1] Low beam lighting module for the low beam zone III, comprising a light source (1) and a lens (2), further comprising a transparent optical element (3) and a low beam generating mechanism for the low beam zone III, wherein the light source (1), the low beam generating mechanism for the low beam zone III, the transparent optical element (3) and the lens (2) are arranged one behind the other along the light path of the light forming the light shape of the low beam zone III, wherein the low beam generation mechanism for the low beam zone III comprises only a first reflector (4) and only a second reflector (5), and the first reflector (4) and the second reflector (5) are arranged on two sides of the optical axis of the lens (2) and offset from one another, wherein the light source (1) is located at a first focal point of the first reflector (4), wherein a second focal point of the first reflector (4) overlaps with a first focal point of the second reflector (5), and a second focal point of the second reflector (5) is arranged at a light entry surface (31) of the transparent optical element (3), and wherein the lens (2) is located directly in front of a light exit surface (32) of the transparent optical element (3), characterized by , that the first reflector (4) is arranged in front of the transparent optical element (3) and the second reflector (5) is arranged behind the transparent optical element (3) in order to increase the width of one side of the light shape of the low beam zone III. [2] Low beam lighting module according to claim 1, characterized by that, when the low-beam lighting module is installed in a vehicle, the transparent optical element (3) comprises the light entry surface (31), the light exit surface (32), an upper surface (33) and a lower surface (34), wherein the light entry surface (31), the upper surface (33), the lower surface (34) and the light exit surface (32) enclose a light channel (35). [3] Low beam lighting module according to claim 2, characterized bythat the light entry surface (31) is designed as a flat surface or concave or convex arc surface, the upper surface (33) as a flat surface or concave or convex arc surface and the light exit surface (32) as an arc surface which is convex at two ends and concave in the middle. [4] Low beam lighting module according to claim 2, characterized by that a fold or crumpled structure is provided on the surface of at least one of the components light entry surface (31), upper surface (33) and light exit surface (32). [5] Low beam lighting module according to claim 1, characterized by that the first reflector (4) and the second reflector (5) are designed as ellipsoidal reflectors. [6] Low beam illumination module for the low beam zone III, comprising a light source (1) and a lens (2), wherein the low beam illumination module further comprises a transparent optical element (3) and a low beam generating mechanism for the low beam zone III, wherein the light source (1), the low beam generating mechanism for the low beam zone III, the transparent optical element (3) and the lens (2) are arranged one behind the other along the light path of the light forming the light shape of the low beam zone III, and the low-beam generation mechanism for the low-beam zone III comprises two first reflectors (4) and two second reflectors (5), and the two first reflectors (4) and the two second reflectors (5) are each arranged symmetrically on two sides of the optical axis of the lens (2), wherein a second focal point of the first reflector (4) located on one side of the optical axis of the lens (2) overlaps with a first focal point of the second reflector (5) located on the other side of the optical axis of the lens (2), and the first focal points of the two first reflectors (4) overlap with one another, wherein the light source (1) is located at the first focal points of the two first reflectors (4), wherein the second focal points of the two second reflectors (5) are arranged on a light entry surface (31) of the transparent optical element (3),and wherein the lens (2) is located directly in front of a light exit surface (32) of the transparent optical element (3) in order to be able to increase the width of the light shape of the low beam zone III on both sides, characterized by , that the two first reflectors (4) are arranged in front of the transparent optical element (3) and the two second reflectors (5) are arranged behind the transparent optical element (3). [7] Low beam lighting module according to claim 1 or claim 6, characterized by in that the low-beam lighting module further comprises a low-beam reflector (6) whose first focal point is arranged on the light source (1), wherein the low-beam reflector (6) is designed such that the light reflected by the low-beam reflector (6) produces a low-beam shape (001) with a light-dark boundary. [8] Low beam lighting module according to claim 7, characterized byin that it further comprises a radiator, wherein each first reflector (4), each second reflector (5) and the low beam reflector (6) are arranged on the radiator or formed integrally therewith. [9] Vehicle headlights, characterized by that the vehicle headlight comprises a low beam lighting module for the low beam zone III according to one of claims 1 to 8. [10] Vehicle, characterized by that the vehicle comprises a vehicle headlight according to claim 9.

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