Vehicle lamp optical system, vehicle lamp module and vehicle

Abstract

The embodiment of the utility model discloses a vehicle lamp optical system, a vehicle lamp module and a vehicle, and belongs to the technical field of vehicle lamps. According to the scheme, the vehicle lamp optical system comprises an optical unit and a light source; a light emitting surface is arranged at the front end of the optical unit, and a light receiving structure is arranged at the rear end of the optical unit and comprises a light incident surface and a reflecting surface; the reflecting surface is constructed to enable light incident from the light incident surface to be reflected by the reflecting surface and then to be emergent from the light emergent surface so as to form a target light type in front of the vehicle lamp optical system; wherein the light source and the reflecting surface are set as follows: an incident angle formed by light rays incident to the reflecting surface in the main light emitting direction of the light source and the reflecting surface is greater than or equal to a first preset angle; the angle difference between the first preset angle and the total reflection critical angle of the material of the optical unit is smaller than or equal to 2 degrees. Therefore, the size of the automobile lamp optical system can be reduced, and the light type maximum brightness value and the light efficiency meeting the conditions can be achieved under the condition that the reflecting surface does not need to be coated with a reflecting coating.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle lighting, in particular to a vehicle lamp optical system, a vehicle lamp module and a vehicle. BACKGROUND

[0002] The current common vehicle lamp module usually contains multiple components such as an outer lens and a light collecting structure (including a reflection bowl and a lens scheme) in addition to a lamp panel, a driver and a support, and needs to additionally set a cutoff line baffle and other components when the light type needs a cutoff line. The large number of parts in the vehicle lamp module makes the overall size large and the structure complex, introduces more tolerances (including errors of individual parts and errors of assembly), reduces the yield, and the more parts result in higher production costs.

[0003] In the related art, an optical unit with simple structure, high efficiency and small size is proposed, the front end of the optical unit is provided with an outlight surface, the rear end is provided with a light collecting structure, the light collecting structure includes a light entrance surface and a reflection surface, and the reflection surface is configured so that the light incident from the light entrance surface is reflected from the reflection surface to form a target light type in front of the vehicle lamp optical system. Such a vehicle lamp optical system reduces the manufacturing cost and is beneficial to improving the manufacturing and assembly precision of the vehicle lamp module. However, in order to make the light intensity maximum value point on the brightness distribution of the target light type and the efficiency meet the requirements, the reflection surface usually needs to be coated with a reflective coating or an additional shaped reflector. The operation of coating the reflection surface with a reflective coating or adding a shaped reflector will cause high manufacturing cost and high process difficulty. CONTENT OF THE UTILITY MODEL

[0004] The vehicle lamp optical system, the vehicle lamp module and the vehicle provided by the embodiments of the present application solve the problem that the vehicle lamp optical system with an integrated optical unit adopting a side light type reflection structure will cause high manufacturing cost and high process difficulty if the light intensity maximum value point on the brightness distribution of the target light type and the efficiency need to meet the requirements.

[0005] To solve the above technical problems, the embodiments of the present application are implemented as follows:

[0006] The vehicle lamp optical system provided by the embodiments of the present application comprises an optical unit 100 and a light source 200; the front end of the optical unit 100 is provided with a light emitting structure 1, and the rear end is provided with a light collecting structure 2, the light collecting structure 2 comprises a first light entering surface 21 and a reflecting surface 22; the light source 200 is arranged adjacent to the first light entering surface 21; the light incident from the first light entering surface 21 is reflected by the reflecting surface 22 and then emitted from the light emitting structure 1 to form a target light pattern in front of the vehicle lamp optical system; wherein the light source 200 and the reflecting surface 22 are arranged such that the light rays incident from the main light emitting direction of the light source 200 to the reflecting surface 22 form an incident angle with the reflecting surface 22 greater than or equal to a first preset angle; the angle difference between the first preset angle and the critical angle of total reflection of the material of the optical unit 100 is less than or equal to 2 degrees.

[0007] Optionally, the reflecting surface 22 is a total reflecting surface.

[0008] Optionally, the light source 200 and the reflecting surface 22 are arranged such that the light rays incident from the main light emitting direction of the light source 200 to the reflecting surface 22 form an incident angle with the reflecting surface 22 greater than or equal to a first angle; the first angle is 37 degrees to 40 degrees.

[0009] Optionally, the light source 200 and the reflecting surface 22 are arranged such that the light rays incident from the main light emitting direction of the light source 200 to the reflecting surface 22 form an incident angle with the reflecting surface 22 greater than or equal to a second angle; the second angle is 44 degrees to 46 degrees.

[0010] Optionally, the light source 200 and the reflecting surface 22 are arranged such that the light rays incident from the main light emitting direction of the light source 200 to the reflecting surface 22 form an incident angle with the reflecting surface 22 greater than or equal to a third angle; the third angle is 50 degrees.

[0011] Optionally, the light collecting structure 2 further comprises a first cutoff line structure on the reflecting surface 22, the first cutoff line structure is configured to destroy the reflecting effect of the local reflecting surface 22; at least one focal point of the light emitting structure 1 is located at the first cutoff line structure.

[0012] Optionally, the light collecting structure 2 specifically comprises a cutting surface 23 cut from the reflecting surface 22, and the shape of the first intersection line 201 between the reflecting surface 22 and the cutting surface 23 is adapted to the shape of the light pattern cutoff line.

[0013] Optionally, the reflective surface 22 of the light-receiving structure 2 comprises a first region 221 coated with a high-absorption material on the outside and a second region 222 not coated with the high-absorption material, and a boundary line 202 between the first region 221 and the second region 222 is shaped in accordance with the shape of the light-type cutoff line.

[0014] Optionally, the optical unit 100 further comprises a first splicing portion 3 located at the rear end of the light-receiving structure 2, the first splicing portion 3 is made of a non-transparent material, and a splicing interface between the first splicing portion 3 and the light-receiving structure 2 is shaped in accordance with the shape of the second intersection line 203 of the reflective surface 22 and the shape of the light-type cutoff line.

[0015] Optionally, the optical unit 100 further comprises a second cutoff line structure located downstream of the reflective surface 22 in the optical path, the second cutoff line structure is configured to block part of the light rays emitted from the reflective surface 22 towards the light-emitting structure 1; at least one focal point of the light-emitting structure 1 is located at the second cutoff line structure.

[0016] Optionally, the second cutoff line structure comprises a groove 4 located in the lower side region of the optical unit 100; the groove 4 comprises a first side 41 close to the light-receiving structure 2 and a second side 42 away from the light-receiving structure 2, and a third intersection line 401 between the first side 41 and the second side 42 is shaped in accordance with the shape of the light-type cutoff line.

[0017] Optionally, the optical unit 100 further comprises a second splicing portion 5 located in the groove 4, and the second splicing portion 5 is made of a non-transparent material.

[0018] Optionally, at least one of the first side 41 and the second side 42 is coated with a high-absorption material or a high-reflectivity material.

[0019] Optionally, the light-emitting structure 1 specifically comprises a first light-emitting surface 11; the light-receiving structure 2 is configured to form an intermediate light image at the focal plane of the first light-emitting surface 11, and the first light-emitting surface 11 is configured to image the intermediate light image to the front of the vehicle lamp optical system.

[0020] Optionally, the light-emitting structure 1 specifically comprises a second light-emitting surface 12, a second light-receiving surface 13 and a third light-emitting surface 14 arranged in sequence in the optical path; the light-receiving structure 2 is configured to form an intermediate light image at the common focal plane of the second light-emitting surface 12, the second light-receiving surface 13 and the third light-emitting surface 14, and the second light-emitting surface 12, the second light-receiving surface 13 and the third light-emitting surface 14 are configured to image the intermediate light image to the front of the vehicle lamp optical system.

[0021] Optionally, the second light-exit surface 12 is configured to control the lateral distribution of light rays.

[0022] Optionally, the second light-exit surface 12 comprises one or more optical surfaces configured to adjust the propagation direction of light rays in the left-right direction.

[0023] Optionally, the second light-exit surface 12, the second light-enter surface 13 and the third light-exit surface 14 are configured to jointly control the vertical distribution of light rays.

[0024] Optionally, at least one of the second light-exit surface 12, the second light-enter surface 13 and the third light-exit surface 14 comprises one or more optical surfaces configured to adjust the propagation direction of light rays in the up-down direction.

[0025] Optionally, the light-receiving structure 2 further comprises a first cutoff line structure on the reflective surface 22, the first cutoff line structure being configured to destroy the reflection of a local part of the reflective surface 22; a focal point of the second light-exit surface 12 in the left-right direction is located at the first cutoff line structure; focal points of the second light-exit surface 12, the second light-enter surface 13 and the third light-exit surface 14 in the up-down direction are located at the first cutoff line structure.

[0026] Optionally, the optical unit 100 further comprises a second cutoff line structure downstream of the reflective surface 22 in an optical path, the second cutoff line structure being configured to block part of light rays emitted from the reflective surface 22 towards the light-exit structure 1; a focal point of the second light-exit surface 12 in the left-right direction is located at the second cutoff line structure; focal points of the second light-exit surface 12, the second light-enter surface 13 and the third light-exit surface 14 in the up-down direction are located at the second cutoff line structure.

[0027] The vehicle lamp module provided by the embodiments of the present specification comprises the vehicle lamp optical system provided by the embodiments of the present specification.

[0028] The vehicle provided by the embodiments of the present specification comprises the vehicle lamp module provided by the embodiments of the present specification.

[0029] One embodiment of the present specification can at least achieve the following beneficial effects: An automobile lamp optical system is constructed, which includes an optical unit and a light source; the front end of the optical unit is provided with an outlight surface, and the rear end is provided with a light-receiving structure, which includes an inlight surface and a reflecting surface; the reflecting surface is configured such that light incident from the inlight surface is reflected by the reflecting surface and then emitted from the outlight surface to form a target light pattern in front of the automobile lamp optical system; wherein the light source and the reflecting surface are arranged such that the angle of incidence formed by the light rays of the main light emission direction of the light source incident to the reflecting surface is greater than or equal to a first preset angle; the angle difference between the first preset angle and the critical angle of total reflection of the material of the optical unit is less than or equal to 2 degrees; thereby, the size of the automobile lamp optical system can be reduced, the automobile lamp lighting function can be realized in a simple structure, high efficiency and small size, the manufacturing cost is reduced, the manufacturing and assembly precision of the automobile lamp module is improved, and higher design freedom of the whole lamp modeling is brought; and on this basis, by reasonably arranging the positions of the light source and the reflecting surface, the angle of incidence formed by the light rays of the main light emission direction of the light source incident to the reflecting surface is greater than or equal to the first preset angle determined based on the critical angle of total reflection of the material of the optical unit, thereby, the maximum brightness value and the light efficiency of the light pattern meeting the condition can be realized without coating a reflective coating on the reflecting surface. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present specification or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0031] Figure 1 A perspective view of an automobile lamp optical system provided by an embodiment of the present specification is shown;

[0032] Figure 2 A longitudinal sectional view of an optical unit in an automobile lamp optical system provided by an embodiment of the present specification is shown;

[0033] Figure 3Figures showing simulation results of light effects of an optical unit according to an embodiment of the present specification, where the optical unit is made of PC material: (a) light propagation diagram and (b) light intensity contour diagram of a light image formed when the angle of incidence of light rays of the main light emitting direction of a light source to a reflecting surface is 45 degrees; and (c) light propagation diagram and (d) light intensity contour diagram of a light image formed when the angle of incidence of light rays of the main light emitting direction of a light source to a reflecting surface is 45 degrees, where a reflective coating is coated on the outside of the reflecting surface in the related art;

[0034] Figure 4 Figures showing simulation results of optical effects of an optical unit according to an embodiment of the present specification, where the optical unit is made of PC material: (a) light propagation diagram and (b) light intensity contour diagram of a light image formed when the angle of incidence of light rays of the main light emitting direction of a light source to a reflecting surface is 50 degrees; and (c) light propagation diagram and (d) light intensity contour diagram of a light image formed when the angle of incidence of light rays of the main light emitting direction of a light source to a reflecting surface is 50 degrees, where a reflective coating is coated on the outside of the reflecting surface in the related art;

[0035] Figure 5 Figures showing simulation results of optical effects of an optical unit according to an embodiment of the present specification, where the optical unit is made of PC material: (a) light propagation diagram and (b) light intensity contour diagram of a light image formed when the angle of incidence of light rays of the main light emitting direction of a light source to a reflecting surface is 55 degrees; and (c) light propagation diagram and (d) light intensity contour diagram of a light image formed when the angle of incidence of light rays of the main light emitting direction of a light source to a reflecting surface is 55 degrees, where a reflective coating is coated on the outside of the reflecting surface in the related art;

[0036] Figure 6 Figures showing simulation data of optical effects of an optical unit according to an embodiment of the present specification: simulation experimental results of maximum light intensity values of a light image when the angle of incidence of light rays of the main light emitting direction of a light source to a reflecting surface is different, where the optical unit is made of PC material or PMMA material; where the horizontal axis represents the included angle between the angle of incidence and the angle of emergence; and the vertical axis represents the maximum brightness value, in units of candela (cd).

[0037] Figure 7 The optical effect simulation data of an optical unit provided by the embodiment of the present specification is shown: simulation experimental results of the light efficiency when the main light emitting direction of the light source is incident to the light rays of the reflecting surface at different angles formed by the reflecting surface when the optical unit adopts PC material or PMMA material; wherein the horizontal axis represents the included angle between the incident angle and the exit angle; the vertical axis reflects the light efficiency, and the unit is lumen (lm);

[0038] Figure 8 A perspective view of an optical unit with a cutoff line structure contained in a vehicle lamp optical system is shown, which is provided by the embodiment of the present specification;

[0039] Figure 9 A perspective view of another optical unit with a cutoff line structure contained in a vehicle lamp optical system is shown, which is provided by the embodiment of the present specification;

[0040] Figure 10 A position schematic view of setting a first cutoff line structure in an optical unit is shown, which is provided by the embodiment of the present specification;

[0041] Figure 11 A partial perspective schematic view of an optical unit provided with a first cutoff line structure is shown, which is provided by the embodiment of the present specification;

[0042] Figure 12 A partial perspective schematic view of another optical unit provided with a first cutoff line structure is shown, which is provided by the embodiment of the present specification;

[0043] Figure 13 A partial perspective schematic view of still another optical unit provided with a first cutoff line structure is shown, which is provided by the embodiment of the present specification;

[0044] Figure 14 A partial longitudinal sectional schematic view of still another optical unit provided with a first cutoff line structure is shown, which is provided by the embodiment of the present specification;

[0045] Figure 15 A position schematic view of setting a second cutoff line structure in an optical unit is shown, which is provided by the embodiment of the present specification;

[0046] Figure 16 A partial perspective schematic view of an optical unit provided with a second cutoff line structure is shown, which is provided by the embodiment of the present specification;

[0047] Figure 17 A partial longitudinal sectional schematic view of an optical unit provided with a second cutoff line structure is shown, which is provided by the embodiment of the present specification;

[0048] Figure 18Fig. 6 shows a partial longitudinal sectional view of another optical unit provided with a second cut-off line structure according to an embodiment of the present specification;

[0049] Figure 19 Fig. 7 shows a structure view of a light exit surface of an optical unit of a vehicle lamp optical system according to an embodiment of the present specification;

[0050] Figure 20 Fig. 8 shows a structure view of a light exit surface of another optical unit of a vehicle lamp optical system according to an embodiment of the present specification;

[0051] Figure 21 Fig. 9 shows a perspective view of another vehicle lamp optical system according to an embodiment of the present specification;

[0052] Figure 22 Fig. 10 shows a perspective view of an optical unit with a cut-off line structure included in another vehicle lamp optical system according to an embodiment of the present specification;

[0053] Figure 23 Fig. 11 shows a perspective view of an optical unit with a cut-off line structure included in another vehicle lamp optical system according to an embodiment of the present specification;

[0054] Figure 24 Fig. 12 shows a perspective view of an optical unit with a cut-off line structure included in another vehicle lamp optical system according to an embodiment of the present specification;

[0055] Figure 25 Fig. 13 shows a longitudinal sectional view of an optical unit of a vehicle lamp optical system according to an embodiment of the present specification;

[0056] Figure 26 Fig. 14 shows a transverse sectional view of an optical unit of a vehicle lamp optical system according to an embodiment of the present specification;

[0057] Figure 27 Fig. 15 shows a perspective view of a vehicle lamp optical system including a plurality of optical units according to an embodiment of the present specification;

[0058] Figure 28 Fig. 16 shows a layout perspective view of a vehicle lamp optical system including a plurality of optical units according to an embodiment of the present specification.

[0059] Reference numerals in the drawings:

[0060] 100 - optical unit;

[0061] 1 - light exit structure; 11 - first light exit surface; 12 - second light exit surface; 13 - second light entrance surface; 14 - third light exit surface; 101 - optical lens surface; 102 - non-optical step surface;

[0062] 2 - light collecting structure; 21 - first light entrance surface; 22 - reflecting surface; 221 - first region; 222 - second region; 23 - cutting surface; 201 - first boundary line; 202 - boundary line; 203 - second boundary line;

[0063] 3 - first splicing part;

[0064] 4 - groove; 41 - first side surface; 42 - second side surface; 401 - third boundary line;

[0065] 5 - second splicing part;

[0066] 200 - light source;

[0067] 300 - printed circuit board. DETAILED DESCRIPTION

[0068] In order to make the purpose, technical scheme and advantages of one or more embodiments of the present specification clearer, the technical scheme of one or more embodiments of the present specification will be described clearly and completely below in conjunction with specific embodiments of the present specification and corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present specification, not all the embodiments. Based on the embodiments in the present specification, all other embodiments obtained by those skilled in the art without making creative labor fall within the scope of protection of one or more embodiments of the present specification.

[0069] The structures, proportions, sizes, etc. shown in the drawings attached to the present specification are only used to cooperate with the content disclosed in the present specification, to be understood and read by those skilled in the art, and do not have technical significance to limit the conditions that can be implemented by the present utility model, so any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that can be produced by the present utility model and the purposes that can be achieved, should still fall within the scope of the technical content disclosed by the present utility model.

[0070] It should be noted that in the description of the present specification, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Unless otherwise specified, the meaning of "multiple" is two or more. The terms "center", "vertical", "horizontal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the present utility model.

[0071] In the following description, the directions / positions of up, down, left, right, front (front end), rear (rear end), and the like are based on the driver's seat of the vehicle.

[0072] At present, in order to make the lamp modeling more novel, one of the improvement directions is to design the lamp more flat. However, the flat lamp modeling also puts higher requirements on the size of the lighting module. That is, it is necessary to design the lighting module to be smaller in size while meeting the optical performance requirements.

[0073] In at least some embodiments of the present specification, Figure 1 and Figure 2 As an example, a vehicle lamp optical system is provided, which includes an optical unit 100 and a light source 200; the front end of the optical unit 100 is provided with a light emitting structure 1, and the rear end is provided with a light collecting structure 2, the light collecting structure 2 includes a first light incident surface 21 and a reflecting surface 22; the light source 200 is arranged adjacent to the first light incident surface 21. Wherein, the light incident from the first light incident surface 21 is reflected by the reflecting surface 22 and then emitted from the light emitting structure 1 to form a target light pattern in front of the vehicle lamp optical system. Specifically, the light collecting structure 2 is configured to reflect the light incident from the first light incident surface 21 by the reflecting surface 22 to form an intermediate light image at the focal plane of the light emitting structure 1, and the light emitting structure 1 is configured to image the intermediate light image to the front of the vehicle lamp optical system.

[0074] Wherein, the light source 200 and the reflecting surface 22 are arranged such that the light rays incident from the main light emitting direction of the light source 200 to the reflecting surface 22 form an incident angle with the reflecting surface 22 greater than or equal to a first preset angle; the angle difference between the first preset angle and the critical angle of total reflection of the material of the optical unit 100 is less than or equal to 2 degrees.

[0075] Wherein, the main light emitting direction of the light source 200 refers to the main direction of light propagation of the light source. For example, for an LED light source, it can refer to the optical axis direction of the light source 200. In actual application, the light emitted from the main light emitting direction of the light source 200 can or can not be angularly deflected when it is incident into the optical unit 100 body through the light incident surface 21. The incident angle formed with the reflecting surface 22 specifically refers to the incident angle of the light rays after entering the optical unit 100 body from the main light emitting direction of the light source 200 with the reflecting surface 22.

[0076] When light rays are emitted from a denser medium to a rarer medium, the angle of refraction will be greater than the angle of incidence; when the angle of incidence is a certain value, the angle of refraction is equal to 90°, and this angle of incidence is called the critical angle. The critical angle is the minimum angle of incidence that causes total reflection. The critical angle can be calculated by the following formula:

[0077] wherein n2 is the refractive index of the lower density medium, and n1 is the refractive index of the higher density medium.

[0078] In the embodiments of the present specification, at the reflecting surface 22, light rays are emitted from the inside of the optical unit 100 to the outside of the optical unit 100, which is usually air. The material of the optical unit 100 is a higher density medium, and the air is a lower density medium. According to the aforementioned formula, when the lower density medium is fixed as air, the greater the refractive index of the material of the optical unit 100 as the higher density medium, the smaller the critical angle.

[0079] In practical applications, the refractive index of air can be set to 1. Alternatively, if the material of the optical unit 100 is polycarbonate (PC), and the actual refractive index of the PC material is 1.58, then the calculated total reflection critical angle is about 39 degrees; alternatively, if the material of the optical unit 100 is polymethyl methacrylate (PMMA), and the actual refractive index of the PMMA material is 1.49, then the calculated total reflection critical angle is about 42 degrees.

[0080] In practice, the corresponding total reflection critical angle can be calculated according to the refractive index of the material of the optical unit 100, and then the first preset angle less than or equal to 2 degrees from the total reflection critical angle is determined. Thus, by setting the relative positions of the light source 200 and the reflecting surface 22 and the structure of the reflecting surface 22, etc., the incident angle formed by the light rays emitted by the main light emitting direction of the light source 200 to the reflecting surface 22 can be greater than or equal to the aforementioned determined first preset angle, so as to realize that the target light pattern formed by the light rays emitted from the optical unit 100 meets the design requirements in terms of the light intensity maximum value point of the brightness distribution and the efficiency.

[0081] As Figure 2 , a longitudinal sectional view of a vehicle lamp optical system (optical unit 100) corresponding to Figure 1 provided by the embodiments of the present specification is shown. And specifically, Figure 2 the propagation direction of the light emitted by the light source 200 in the main light emitting direction thereof in the vehicle lamp optical system of the embodiments of the present specification is schematically shown.

[0082] The light source 200, the first light-incident surface 21, the reflecting surface 22, and the light-outgoing structure 1 are sequentially arranged along an optical path. The light-receiving structure 2 is configured to form an intermediate light image at a focal plane of the light-outgoing structure 1 after light incident from the first light-incident surface 21 is reflected by the reflecting surface 22, and the light-outgoing structure 1 is configured to image the intermediate light image to a front of the vehicle lamp optical system. Specifically, the first light-incident surface 21 is close to the light source 200 and collects light rays, and the reflecting surface 22 performs secondary light distribution on the light rays emitted by the light source 200, so that the light rays are emitted after converging at the light-outgoing structure 1 to form a light pattern. In actual application, the vehicle lamp optical system (the optical unit 100) can form a target light pattern or a part of the target light pattern in a traffic space in front of a vehicle on which a vehicle lamp module containing the vehicle lamp optical system is installed.

[0083] In at least some embodiments of the present specification, the light-receiving structure 2 can be used to collect light rays emitted by the light source 200 and converge the light rays to the light-outgoing structure 1 by the reflecting surface 22. The reflecting surface 22 can be a continuous curved surface. Specifically, the reflecting surface 22 can be a curved surface convex to the rear end. More specifically, the reflecting surface 22 can be configured such that the light rays projected thereon converge to a certain extent in the left-right direction and the up-down direction.

[0084] In actual application, according to the application principle of the vehicle lamp optical system, the target light pattern is obtained by projecting the light spot (the light spot is obtained by the intersection of the focal plane and the light beam) at the focal plane by the optical system (for example, the light-outgoing structure 1). The shape of the light spot at the focal plane is an important factor affecting the shape of the target light pattern; the energy distribution at the focal plane is an important factor affecting the brightness distribution of the target light pattern. And according to the regulation requirements of vehicle lamp light distribution, there needs to be a light intensity maximum point on the brightness distribution of the target light pattern. In actual application, how to reduce the size of the vehicle lamp optical system while ensuring or even improving the light intensity maximum point of the target light pattern is crucial, and is a key problem in the manufacture of small-size vehicle lamp optical systems.

[0085] In at least some embodiments of the present specification, an integrated optical unit with a side-lighting reflecting structure is used to reduce the size of the vehicle lamp optical system, but due to the characteristics of the reflecting structure itself, the energy distribution at the reflecting surface 22 is non-uniform, which in turn leads to non-uniform energy distribution at the focal plane of the adjacent position. This is because the closer the area of the reflecting surface 22 to the light source 200 (for example, the area near the light source 200), the more light rays are reflected, and the farther the area of the reflecting surface 22 from the light source 200 (for example, the area far from the light source 200), the less light rays are reflected. Figures 10 to 18The stronger the energy received by the lower left region of the reflecting surface 22 shown in FIG. 1, the more difficult it is to meet the condition of the total reflection theorem for the region closer to the light source 200, and for this reason, it is generally considered difficult to rely on the reflection of the reflecting surface 22 material itself to reflect enough light through the light-exit structure 1 to contribute to the light intensity.

[0086] In the related art, in order to make the light intensity maximum point on the brightness distribution of the target light pattern and the efficiency meet the requirements, it is usually solved by coating a reflective coating (for example, aluminum, silver, stainless steel, chromium, etc.) outside the reflecting surface 22 or adding a shaped reflector. In this case, the light-exit structure 1 can be constructed so that its focal point falls on a region of the reflecting surface 22 with higher light intensity (for example, the lower left region of the reflecting surface 22 shown in FIG. 1), and a larger light intensity maximum point in the target light pattern is obtained with the help of the reflective coating or the shaped reflector. Figures 10 to 18

[0087] However, by coating a reflective coating outside the reflecting surface 22 or adding a shaped reflector, although the light intensity maximum point on the brightness distribution of the target light pattern can meet the requirements, additional processes are added, on the one hand, increasing the manufacturing cost, on the other hand, also increasing the process manufacturing error, especially the scheme of adding a shaped reflector, the process is difficult, further increasing the process manufacturing error.

[0088] The inventors of the present application have found through research that in actual application, by adjusting the angle of the light rays of the main light-emitting direction of the light source 200 incident to the reflecting surface 22 and the angle formed by the reflecting surface 22, the light intensity maximum point on the brightness distribution of the target light pattern and the efficiency of the integrated optical unit 100 using a side-entry light reflecting structure can meet the requirements without coating a reflective coating outside the reflecting surface 22 or adding a shaped reflector.

[0089] Specifically, the reflecting surface 22 can be a total reflecting surface. That is, light is incident to the reflecting surface 22 at an angle greater than the critical angle of total reflection, and only light reflection occurs on the reflecting surface 22, and light refraction does not substantially occur.

[0090] The vehicle lamp optical unit 100 can be made of a transparent light guide material. Optionally, the transparent light guide material can include polymethyl methacrylate (PMMA), polycarbonate (PC), polyphenylmethane tetracarboxamide (PMMI), silicone, or glass, etc., without being limited thereto.

[0091] ​In at least some embodiments of the present specification, the angle of the total reflection critical angle can be determined according to the refractive index of the material of the optical unit 100, and used to adjust the angle of incidence of the light rays from the main light emitting direction of the light source 200 to the reflecting surface 22. Assuming that the angle of the total reflection critical angle of the material of the optical unit 100 is A, the light source 200 and the reflecting surface 22 can be arranged such that the angle of incidence of the light rays from the main light emitting direction of the light source 200 to the reflecting surface 22 is greater than or equal to any angle in the range of (A-2) degrees to (A+2) degrees, for example, greater than or equal to (A-2) degrees. In this way, most of the light rays incident on the reflecting surface 22 can satisfy the total reflection condition, thereby meeting the requirements for the maximum light intensity point and the efficiency of the target light pattern of the integrated optical unit 100 using the side-in light reflection structure without the need for a reflective coating on the outside of the reflecting surface 22 or the addition of a conformal mirror.

[0092] Optionally, the vehicle lamp optical unit 100 can be made of PC material. The following examples are given with the optical unit 100 made of PC material.

[0093] As shown in Figures 3 to 5 , the simulation results when the angle of incidence of the light rays from the main light emitting direction of the light source 200 to the reflecting surface 22 is set to 45 degrees, 50 degrees, and 55 degrees, respectively, are shown in (a), (b), and (c), respectively, including the light ray propagation diagram and the light intensity contour map of the formed light image.

[0094] As shown in Figures 3 to 5 , the solid lines with arrows represent the light rays incident on the reflecting surface 22 from the light source 200 and the light rays emitted after reflection by the reflecting surface 22. Among them, (a) represents the light ray propagation diagram in the optical system of the present specification, which includes a total reflection surface without a reflective coating; (b) represents the light intensity contour map corresponding to (a); (c) represents the light ray propagation diagram when a reflective coating is applied on the outside of the reflecting surface in the related art; and (d) represents the light intensity contour map corresponding to (c).

[0095] In Figure 3In the case where the optical unit 100 is made of PC material, the ray propagation diagram (a) and the light intensity contour diagram (b) of the light image formed when the angle of incidence of the light rays from the light source 200 incident on the reflecting surface 22 of the optical unit 100 is 45 degrees, and the light rays are incident on the reflecting surface 22 in the main light emitting direction of the light source 200, and the light rays are not coated with a reflective coating on the outside of the reflecting surface 22 or a shaped reflector is not added, as in at least some embodiments of the present disclosure, and the ray propagation diagram (c) and the light intensity contour diagram (d) of the light image formed when the angle of incidence of the light rays from the light source 200 incident on the reflecting surface 22 of the optical unit 100 is 45 degrees, and the light rays are incident on the reflecting surface 22 in the main light emitting direction of the light source 200, and the light rays are coated with a reflective coating on the outside of the reflecting surface 22, as in the related art, are shown in FIGS. 10A and 10B.

[0096] Specifically, in addition to the condition of whether a reflective coating is provided on the reflecting surface 22, Figure 3 in (a) and (b), and Figure 3 in (c) and (d), the other experimental conditions are kept the same. Specifically, the material, shape and size of the optical element 100, the luminous flux of the light source 200 and the setting position relative to the optical unit 100, and the like are set to remain the same. In addition, in the simulation experiment, the reflectivity of the reflective coating is set to 0.8.

[0097] As Figure 3 the experimental results of (a), in Figure 3 the light intensity contour diagram shown in (b), the maximum light intensity value is 34.943 cd; the light efficiency is 0.584 lm (based on 1 lm). As Figure 3 the experimental results of (c), in Figure 3 the light intensity contour diagram shown in (d), the maximum light intensity value is 33.05 cd; the light efficiency is 0.549 lm (based on 1 lm).

[0098] According to the experimental results of Figure 3 it can be seen that, in actual application, if the scheme of the embodiments of the present disclosure is adopted, in the case where the optical unit 100 is made of PC material and the angle of incidence of the light rays from the light source 200 incident on the reflecting surface 22 of the optical unit 100 is 45 degrees, and the light rays are incident on the reflecting surface 22 in the main light emitting direction of the light source 200, compared with the scheme of the related art in which a reflective coating is used, a comparable or even higher light efficiency and a larger maximum light intensity value are obtained, and an unexpected excellent effect is achieved.

[0099] In Figure 4In the case where the optical unit 100 is made of PC material, the ray propagation diagram (a) and the light intensity contour diagram (b) of the light image formed when the angle of incidence of the light rays from the light source 200 incident on the reflecting surface 22 of the optical unit 100 is 50 degrees, and the light rays are mainly emitted in the main light emitting direction of the light source 200, are shown in FIGS. 1(a) and 1(b) respectively, in the case where no reflective coating is applied to the outside of the reflecting surface 22 or no shaped reflector is added in at least some embodiments of the present disclosure; and the ray propagation diagram (c) and the light intensity contour diagram (d) of the light image formed when the angle of incidence of the light rays from the light source 200 incident on the reflecting surface 22 of the optical unit 100 is 50 degrees, and the light rays are mainly emitted in the main light emitting direction of the light source 200, are shown in FIGS. 1(c) and 1(d) respectively, in the case where a reflective coating is applied to the outside of the reflecting surface 22 in the related art.

[0100] Specifically, in addition to the condition of whether a reflective coating is provided on the reflecting surface 22, Figure 4 in (a) and (b), and Figure 4 in (c) and (d), the other experimental conditions are kept consistent. Specifically, the material, shape and size of the optical element 100, the luminous flux of the light source 200 and the setting position relative to the optical unit 100, and other experimental conditions are set to remain consistent. In addition, in the simulation experiment, the reflectivity of the reflective coating is set to 0.8.

[0101] As Figure 4 the experimental results of (a), in Figure 4 the light intensity contour diagram shown in (b), the maximum light intensity value is 41.403 cd; and the light efficiency is 0.63 lm (based on 1 lm). As Figure 4 the experimental results of (c), in Figure 4 the light intensity contour diagram shown in (d), the maximum light intensity value is 33.246 cd; and the light efficiency is 0.52 lm (based on 1 lm).

[0102] According to the experimental results of Figure 4 it can be seen that, in actual application, if the scheme of the embodiments of the present disclosure is adopted, in the case where the optical unit 100 is made of PC material and the angle of incidence of the light rays from the light source 200 incident on the reflecting surface 22 of the optical unit 100 is 50 degrees, and the light rays are mainly emitted in the main light emitting direction of the light source 200, compared with the scheme of the related art in which a reflective coating is used, a significantly more excellent effect is obtained, including a higher light efficiency and a larger maximum light intensity value, and an unexpected excellent effect is achieved.

[0103] In Figure 5The diagram illustrates the light propagation when the optical unit 100 is made of PC material, and the angle of incidence between the light ray from the main emission direction of the light source 200 and the reflective surface 22 is 55 degrees, as shown in at least some embodiments of this specification where no reflective coating is applied to the outside of the reflective surface 22 or a conformal reflector is added. It also illustrates the light propagation when the angle of incidence between the light ray from the main emission direction of the light source 200 and the reflective surface 22 is 55 degrees, as shown in related art where a reflective coating is applied to the outside of the reflective surface 22. The diagram further illustrates the light propagation when the angle of incidence between the light ray from the main emission direction of the light source 200 and the reflective surface 22 is 55 degrees, as shown in related art. Finally, it illustrates the light propagation when the optical unit 100 is made of PC material, and the light intensity contour plot of the resulting light image is shown.

[0104] Specifically, aside from the condition of whether or not a reflective coating is provided on the reflective surface 22, Figure 5 In (a) and (b), with Figure 5 All other experimental conditions in (c) and (d) were kept consistent. Specifically, the material, shape, and size of the optical element 100, the luminous flux of the light source 200, and its placement relative to the optical unit 100 were all kept consistent. Furthermore, in the simulation experiment, the reflectivity of the reflective coating was set to 0.8.

[0105] As Figure 5 The experimental results in (a) are in Figure 5 (b) In the light intensity contour map shown, the maximum light intensity is 42.037 cd; the light efficiency is 0.592 m (based on 1 lm). Figure 5 The experimental results in (c) are in Figure 5 In the light intensity contour map shown in (d), the maximum light intensity is 33.79 cd; the light efficiency is 0.475 m (based on 1 lm).

[0106] according to Figure 5 The experimental results show that, in practical applications, if the solution of the embodiment in this specification is adopted, and the optical unit 100 is made of PC material and the angle of incidence formed by the light rays from the main light emission direction of the light source 200 incident on the reflective surface 22 and the reflective surface 22 is 55 degrees, a significantly better effect is obtained compared with the solution of using a reflective coating in related technologies. This includes obtaining higher light efficiency and a larger maximum light intensity value, achieving unexpectedly excellent results.

[0107] Further, in order to further compare and analyze the case where the reflective coating is not coated outside the reflective surface 22 or the shaped reflector is additionally provided in at least some embodiments of the present specification and the case where the reflective coating is coated outside the reflective surface 22 in the related art, simulation experimental results of the maximum light intensity value and the light efficiency of the light image are also provided when the optical unit 100 is made of PC material and the angle of incidence of the light ray of the main light emitting direction of the light source 200 incident to the reflective surface 22 and the reflective surface 22 is 37.5 degrees to 55 degrees.

[0108] Figure 6 As shown in FIGS. 13 to 16, simulation experimental results of the maximum light intensity value of the light image when the angle of incidence of the light ray of the main light emitting direction of the light source 200 incident to the reflective surface 22 and the reflective surface 22 is different are shown when the optical unit 100 is made of PC material or PMMA material. Figure 7 As shown in FIGS. 17 to 20, simulation experimental results of the light efficiency when the angle of incidence of the light ray of the main light emitting direction of the light source 200 incident to the reflective surface 22 and the reflective surface 22 is different are shown when the optical unit 100 is made of PC material or PMMA material.

[0109] By combining Figure 6 and Figure 7 it can be known that, in the optional embodiments, if the optical unit 100 is made of PC material, the light source 200 and the reflective surface 22 can be configured such that the angle of incidence of the light ray of the main light emitting direction of the light source 200 incident to the reflective surface 22 and the reflective surface 22 is greater than or equal to 37 degrees. Similarly, in the optional embodiments, if the optical unit 100 is made of PMMA material, the light source 200 and the reflective surface 22 can be configured such that the angle of incidence of the light ray of the main light emitting direction of the light source 200 incident to the reflective surface 22 and the reflective surface 22 is greater than or equal to 40 degrees. In this case, compared with the scheme of using the reflective coating in the related art, the process steps (for example, the film plating process) are reduced, the production cost is reduced, the environment is more friendly, and the light efficiency is equivalent or even higher, the maximum light intensity value is larger, and excellent unexpected effects are achieved.

[0110] Therefore, in the optional embodiments, the light source 200 and the reflective surface 22 can be configured such that the angle of incidence of the light ray of the main light emitting direction of the light source 200 incident to the reflective surface 22 and the reflective surface 22 is greater than or equal to a first angle, and the first angle can be 37 degrees to 40 degrees. In this case, compared with the scheme of using the reflective coating in the related art, the process steps (for example, the film plating process) are reduced, the production cost is reduced, the environment is more friendly, and the light efficiency is equivalent or even higher, the maximum light intensity value is larger, and excellent unexpected effects are achieved.

[0111] In optional embodiments, if the optical unit is made of PC material, the light source 200 and the reflective surface 22 can be arranged such that the angle of incidence formed by the light rays from the main light emitting direction of the light source 200 to the reflective surface 22 is greater than or equal to 44 degrees. Similarly, in optional embodiments, if the optical unit is made of PMMA material, the light source 200 and the reflective surface 22 can be arranged such that the angle of incidence formed by the light rays from the main light emitting direction of the light source 200 to the reflective surface 22 is greater than or equal to 46 degrees. In this case, compared with the solution of using a reflective coating in the related art, not only the process steps (e.g., the film plating process) are reduced, the production cost is reduced, and the environment is more friendly, but also a significantly higher light efficiency and a larger maximum light intensity value are obtained, the technical prejudice is overcome, and excellent unexpected effects are achieved.

[0112] Therefore, in optional embodiments, the light source 200 and the reflective surface 22 can be arranged such that the angle of incidence formed by the light rays from the main light emitting direction of the light source 200 to the reflective surface 22 is greater than or equal to a second angle; the second angle can be 44 degrees to 46 degrees. In this case, compared with the solution of using a reflective coating in the related art, not only the process steps (e.g., the film plating process) are reduced, the production cost is reduced, and the environment is more friendly, but also a significantly higher light efficiency and a larger maximum light intensity value are obtained, the technical prejudice is overcome, and excellent unexpected effects are achieved.

[0113] In optional embodiments, if the optical unit is made of PC material, the light source 200 and the reflective surface 22 can be arranged such that the angle of incidence formed by the light rays from the main light emitting direction of the light source 200 to the reflective surface 22 is greater than or equal to 50 degrees. Similarly, in optional embodiments, if the optical unit is made of PMMA material, the light source 200 and the reflective surface 22 can be arranged such that the angle of incidence formed by the light rays from the main light emitting direction of the light source 200 to the reflective surface 22 is greater than or equal to 50 degrees. In this case, compared with the solution of using a reflective coating in the related art, not only the process steps (e.g., the film plating process) are reduced, the production cost is reduced, and the environment is more friendly, but also a significantly higher light efficiency and a larger maximum light intensity value are obtained, the technical prejudice is overcome, and excellent unexpected effects are achieved.

[0114] Therefore, in optional embodiments, the light source 200 and the reflecting surface 22 can be arranged such that the light rays of the main light emitting direction of the light source 200 incident to the reflecting surface 22 form an incident angle with the reflecting surface 22 greater than or equal to a third angle; the third angle can be 50 degrees. In this case, compared with the solution of using a reflective coating in the related art, not only the process steps (for example, the plating process) are reduced, the production cost is reduced, the environment is protected, but also a significantly higher light efficiency and a larger maximum light intensity value are stably obtained, the technical prejudice is overcome, and an unexpected excellent effect is achieved.

[0115] The above analysis and experimental data show that, compared with the solution of using a reflective coating in the related art, by controlling the light rays of the main light emitting direction of the light source 200 incident to the reflecting surface 22 to form an incident angle with the reflecting surface 22 greater than or equal to a first preset angle (the angle difference between the first preset angle and the critical angle of total reflection of the material of the optical unit 100 is less than or equal to 2 degrees), a light emitting effect that is not bad or even better and stable can be obtained under the conditions of reducing the process manufacturing steps of the optical system, reducing the risk of manufacturing errors that can be introduced, and reducing the cost, for example, having a larger maximum brightness value and a higher light efficiency, the technical prejudice is overcome, and an unexpected effect is achieved.

[0116] In at least some embodiments of the present specification, the first light entrance surface 21 can be a smooth surface, for example, can be a plane, a convex curved surface or a concave curved surface. In actual application, the first light entrance surface 21 can also be provided as a suitable patterned surface.

[0117] In actual application, the distance between the light source 200 and the light collecting structure 2 can be set as small as possible to improve the light efficiency. Specifically, the distance between the light source 200 and the first light entrance surface 21 can be set as small as possible. For example, the distance between the light source 200 and the first light entrance surface 21 can be set to be not greater than 5 mm.

[0118] In at least some embodiments of the present specification, the light source 200 can be specifically an LED light source or a laser light source. In addition, only the approximate position of the light source 200 is schematically shown in the drawings, and in actual application, the type, number, position arrangement, etc. of the light source 200 can be adjusted according to design needs.

[0119] Further, the light source 200 can be arranged on a printed circuit board 300, and the main light emitting direction of the light source 200 is substantially consistent with the normal direction of the printed circuit board 300. Therefore, it is convenient to adjust the incident angle of the light rays of the main light emitting direction of the light source 200 incident to the reflecting surface 22 with the reflecting surface 22 by adjusting the position and angle of the printed circuit board 300.

[0120] In practical applications, optionally, the relative position of the light source 200 and the optical unit 100 can be set such that the optical axis direction of the light source 200 is substantially consistent with the normal direction of the first light-incident surface 21. Specifically, if the first light-incident surface 21 is a plane, the normal direction of the first light-incident surface 21 can point to a direction perpendicular to the plane; if the first light-incident surface 21 is a curved surface, the normal direction of the first light-incident surface 21 can point to a direction perpendicular to the tangent plane of the curved surface. This helps maintain the gap between the light source 200 and the light-receiving structure 2, effectively avoiding problems such as damage or ablation caused by localized close proximity due to assembly errors or other factors.

[0121] Based on the optical unit 100 in the automotive lighting optical system provided in the embodiments of this specification, a light pattern without a cutoff line can be provided, for example... Figure 1 . Figure 1 A perspective view of a vehicle lighting optical system (including an optical unit and a light source) provided in an embodiment of this specification is shown, wherein the optical unit does not have a cutoff line structure. In practical applications, such as Figure 1 The automotive lighting optical system shown can be applied to high beams.

[0122] In at least some embodiments of this specification, a cutoff line structure may also be provided in the optical unit 100 to form a light pattern with a cutoff line, for example... Figure 8 , Figure 9 wait. Figure 8 A perspective view of an optical unit with a cutoff line structure provided in an embodiment of this specification is shown. Specifically, the shape of the first boundary line 201 between the reflecting surface 22 and the cutting surface 23 can be adapted to the shape of the light pattern cutoff line. Figure 9 A perspective view of another optical unit with a cutoff line structure provided in an embodiment of this specification is shown, wherein a cutoff line structure is provided, specifically, the shape of the first boundary line 201 between the reflecting surface 22 and the cutting surface 23 can be adapted to the shape of the light pattern cutoff line. In practical applications, such as Figure 8 or Figure 9 The optical unit 100 shown can be applied to low beam headlights, front fog lights, cornering lights, or turn signal lights, etc.

[0123] The following mainly combines Figures 10 to 18 The cutoff line structure is described below. In at least some embodiments of this specification, the cutoff line structure (including a first cutoff line structure and a second cutoff line structure) specifically refers to a structure used to form a cutoff line in a light pattern.

[0124] In an optional embodiment, the light collecting structure 2 can further comprise a first cut-off line structure on the reflecting surface 22, which is configured to destroy the reflecting function of a part of the reflecting surface 22. Specifically, the first cut-off line structure can be configured to prevent part of the light rays incident on the reflecting surface 22 from being reflected.

[0125] The focal point of the light emitting structure 1 (see Figure 8 and Figure 9 ) can be located at the first cut-off line structure, for example, can be located near the first cut-off line structure. In addition, in actual application, when the light emitting structure 1 has multiple focal points, at least one focal point of the light emitting structure 1 can be located near the first cut-off line structure, thereby forming a clear cut-off line in the light pattern.

[0126] As shown in Figure 10 , the elliptical dashed box indicates the area forming the first cut-off line structure, i.e., the area of the reflecting surface 22 whose reflecting function is destroyed. In addition, the first light-incident surface 21 is also shown in Figure 10 . Furthermore, Figure 10 , the light rays shown in dashed lines can represent the light rays cut off by the first cut-off line structure.

[0127] As an optional example, referring to Figure 11 and Figure 12 , the light collecting structure 2 can further comprise a cut surface 23 cut from the reflecting surface 22, and the shape of the first intersection line 201 between the reflecting surface 22 and the cut surface 23 is adapted to the shape of the cut-off line of the light pattern. Wherein, at least one focal point of the light emitting structure 1 (see Figure 8 and Figure 9 ) can be located at the first intersection line 201, for example, can be located on or near the first intersection line 201.

[0128] Optionally, as shown in Figure 11 , the cut surface 23 can extend along a straight line or a smooth curve in the left-right direction, and the cut surface 23 can be a plane or a smooth curved surface, so that the projection of the first intersection line 201 between the cut surface 23 and the reflecting surface 22 (i.e., the projection of the first intersection line 201 on the plane perpendicular to the main optical axis of the light emitting structure 1) can be a straight line. In actual application, when the vehicle lamp optical system is applied to a front fog lamp or a cornering auxiliary illumination lamp (corner lamp), the cut-off line in the light pattern can be a horizontal line.

[0129] Optionally, as shown in Figure 12As shown in FIG. 1, the cutting surface 23 can extend along a line with an inflection point in the left-right direction, the cutting surface 23 can be a surface containing a step, and thus the projection of the first intersection line 201 of the reflecting surface 22 (i.e., the projection of the intersection line on a plane perpendicular to the main optical axis of the light-emitting structure 1) can be a line with an inflection point. In actual applications, when the vehicle lamp optical system is applied to a low-beam lamp, the cutoff line in the light pattern can be a line with an inflection point.

[0130] In actual applications, the cutting surface 23 can also be directly formed when the optical unit 100 is integrally formed, or can be cut and formed through a subsequent processing process after the optical unit 100 is formed.

[0131] As another optional example, referring to Figure 13 , the reflecting surface 22 of the light-receiving structure 2 can include a first region 221 coated with a high-absorption material on the outside and a second region 222 not coated with the high-absorption material, and the shape of the boundary line 202 between the first region 221 and the second region 222 is adapted to the shape of the light pattern cutoff line. Among them, at least one focal point of the light-emitting structure 1 (see Figure 8 and Figure 9 ) can be located at the boundary line 202, for example, can be located on or near the boundary line 202.

[0132] Among them, optionally, the boundary line 202 can be a smooth straight line or curve extending in the left-right direction, and the projection thereof (i.e., the projection of the boundary line 202 on a plane perpendicular to the main optical axis of the light-emitting structure 1) can be a straight line; or optionally, the boundary line 202 can be a smooth broken line extending in the left-right direction, and the projection thereof (i.e., the projection of the boundary line 202 on a plane perpendicular to the main optical axis of the light-emitting structure 1) can be a line with an inflection point.

[0133] Among them, the high-absorption material coated on the second region 222 can include black paint, which can contain, for example, pigments (such as carbon black, iron oxide, titanium white, etc.), solvents (such as dryers, diluents, preservatives, etc.), resins (such as dryers, diluents, preservatives, etc.), and additives (such as dryers, diluents, preservatives, etc.), and the like, and the examples of black paint are not limited thereto, and the examples of high-absorption material are not limited to black paint.

[0134] As yet another optional example, referring to Figure 14 , the optical unit 100 can also include a first splicing portion 3 located at the rear end of the light-receiving structure 2, the first splicing portion 3 is composed of a non-transparent material, and the shape of the splicing interface between the first splicing portion 3 and the light-receiving structure 2 is adapted to the shape of the light pattern cutoff line. Among them, at least one focal point of the light-emitting structure 1 (seeFigure 8 and Figure 9 ) can be located at the second boundary line 203, for example, can be located on or near the second boundary line 203.

[0135] Wherein, optionally, the second boundary line 203 can be a smooth straight line or curve extending in the left-right direction, the projection thereof (i.e. the projection of the second boundary line 203 on a plane perpendicular to the principal axis of the light-out structure 1) can be a straight line; or optionally, the second boundary line 203 can be a smooth broken line extending in the left-right direction, the projection thereof (i.e. the projection of the second boundary line 203 on a plane perpendicular to the principal axis of the light-out structure 1) can be a line with inflection points.

[0136] Wherein, the non-transparent material constituting the first splicing part 3 can include black PC (polycarbonate) material, black PMMA (polymethyl methacrylate) material, etc., not limited thereto.

[0137] In actual application, the first splicing part 3 can be formed in the process of integrally forming the optical unit 100; or optionally, the first splicing part 3 can be formed by subsequent process after integrally forming the main body part of the optical unit 100.

[0138] In optional embodiments, the optical unit 100 can further include a second cut-off line structure downstream of the reflecting surface 22 in the optical path, which can be configured to block part of the light rays emitted from the reflecting surface 22 towards the light-out structure 1 (see Figure 8 and Figure 9 ).

[0139] Wherein, the focal point of the light-out structure 1 (see Figure 8 and Figure 9 ) can be located at the second cut-off line structure, for example, can be located near the second cut-off line structure. In addition, in actual application, when the light-out structure 1 has multiple focal points, at least one focal point of the light-out structure 1 can be located near the second cut-off line structure, thereby being able to form a clear cut-off line in the light pattern.

[0140] In actual application, in order to set the length of the optical unit 100 to be smaller, the second cut-off line structure can be set at a position adjacent to the light-receiving structure 2. As Figure 15 , the elliptical dashed box marks the area forming the second cut-off line structure, which is preferably a position in the optical unit 100 downstream of the light-receiving structure 2 (downstream of the reflecting surface 22 in the optical path) and adjacent to the light-receiving structure 2. Figure 15 The light rays shown by the dashed lines in the figure can represent the light rays cut off by the second cut-off line structure.

[0141] As an optional example, referring to Figure 16 and Figure 17 , the second cutoff line structure can include a groove 4 located at the lower side area of the optical unit 100; the groove 4 can include a first side 41 close to the light collecting structure 2 and a second side 42 away from the light collecting structure 2, and the shape of a third boundary line 401 between the first side 41 and the second side 42 is adapted to the shape of a light type cutoff line. Wherein, at least one focal point of the light emitting structure 1 (see Figure 8 and Figure 9 ) can be located at the third boundary line 401, for example, on or near the third boundary line 401.

[0142] As another optional example, referring to Figure 18 , the optical unit 100 can further include a second splicing part 5 located in the groove 4, and the second splicing part 5 is composed of non-transparent material. The non-transparent material constituting the second splicing part 5 can include black PC (polycarbonate) material, black PMMA (polymethyl methacrylate) material, etc., not limited thereto.

[0143] In actual application, the second splicing part 5 can be formed in the process of integrally forming the optical unit 100; or alternatively, the second splicing part 5 can be formed by subsequent process after the main body of the optical unit 100 is integrally formed.

[0144] As yet another optional example, at least one of the first side 41 and the second side 42 can be coated with high absorption material or high reflection material. Wherein, the high reflection material can include aluminum, silver, stainless steel, chromium, etc., not limited thereto. The high absorption material can include black paint, which can contain, for example, pigments (such as carbon black, iron oxide, titanium white, etc.), solvents (such as dryers, diluents, preservatives, etc.), resins (such as dryers, diluents, preservatives, etc.), and additives (such as dryers, diluents, preservatives, etc.), etc., and examples of black paint are not limited thereto, and examples of high absorption material are not limited to black paint. In actual application, the first side 41 and the second side 42 can also not be coated with any material, and the effect of blocking the light path is achieved only by adjusting the angle; while the high absorption material or the high reflection material can further improve the blocking effect of the light.

[0145] Optionally, the first side surface 41 and the second side surface 42 can extend along a straight line or a smooth curve in the left-right direction. The first side surface 41 and the second side surface 42 can be planar or smooth curved surfaces. Thus, the projection of the third boundary line 401 of the first side surface 41 and the second side surface 42 (i.e., the projection of the third boundary line 401 on a plane perpendicular to the principal optical axis of the light-emitting structure 1) can be a straight line. In practical applications, when the vehicle lamp optical system is applied to front fog lights or cornering lights, the cutoff line in the light pattern can be a horizontal line.

[0146] Optionally, such as Figure 16 As shown in the perspective view, indicated by dashed lines, the first side 41 or the second side 42 can extend along a line with an inflection point in the left-right direction. The first side 41 or the second side 42 can be a surface containing a step. Therefore, the projection of the third boundary line 401 between the first side 41 and the second side 42 (i.e., the projection of the boundary line onto a plane perpendicular to the principal optical axis of the light-emitting structure 1) can be a line with an inflection point. In practical applications, when the automotive lighting optical system is used for low beam headlights, the cutoff line in the beam pattern can be a line with an inflection point.

[0147] Based on one or more embodiments described above in this specification, a vehicle lighting optical system obtained by arranging and combining multiple optical units 100 can form a high beam or low beam pattern in the traffic space in front of a vehicle equipped with a vehicle lighting module containing the corresponding vehicle lighting optical system. Optionally, the vehicle lighting optical system of the embodiments of this specification can also be configured as a front fog light, cornering light, or cornering auxiliary lighting.

[0148] In at least some embodiments of this specification, the provided automotive lighting optical system, such as Figure 1 , Figure 2 , Figure 8 and Figure 9 As shown, the light-emitting structure 1 in the optical unit 100 may specifically include a first light-emitting surface 11; the light-receiving structure 2 is configured to form an intermediate light image at the focal plane of the first light-emitting surface 11, and the first light-emitting surface 11 is configured to image the intermediate light image onto the front of the vehicle lamp optical system.

[0149] Optionally, the first light-emitting surface 11 can be a continuous curved surface. In practical applications, the continuous curved surface can be a surface of revolution, specifically, the surface of revolution can include a spherical surface or an aspherical surface.

[0150] Alternatively, the first light-emitting surface 11 may be a stepped surface, which may include a plurality of optical lens surfaces 101 and a non-optical stepped surface 102 connecting the plurality of optical lens surfaces 101.

[0151] Optionally, to achieve the desired light pattern effect, the focal points of the plurality of optical lens surfaces 101 can be made to overlap or be close to each other. When the optical unit 100 includes a cutoff line structure, in order to achieve a clearer light pattern cutoff line, the focal point of at least one of the plurality of optical lens surfaces 101 can be located near the cutoff line structure.

[0152] In practical applications, stepped patterns can include stepped Fresnel square patterns, stepped Fresnel vertical stripes, stepped Fresnel horizontal stripes, stepped Fresnel rhombus patterns, stepped Fresnel polygonal patterns, and stepped Fresnel irregular stripes, etc. The types of stepped patterns are not limited to the examples listed here.

[0153] As an example, such as Figure 19 This shows a stepped Fresnel checkerboard pattern. Figure 19 In this configuration, multiple optical lens surfaces 101 are arranged in a grid pattern and a staggered checkerboard arrangement, with adjacent optical lens surfaces 101 connected by non-optical stepped surfaces 102. For example... Figure 20 This shows stepped Fresnel vertical stripes. Figure 20 In the process, multiple optical lens surfaces 101 are arranged in a vertical strip and in a staggered side-by-side manner, and adjacent optical lens surfaces 101 are connected by non-optical step surfaces 102.

[0154] In an optional implementation, the outline of the first light-emitting surface 11 can be arbitrarily set according to design requirements. For example, it can be square, circular, or other arbitrary shapes.

[0155] In an optional embodiment, the first light-emitting surface 11 may also be provided with a microstructure pattern to adjust the cutoff line gradient.

[0156] For example, although Figure 1 , Figure 8 and Figure 9 The example shown uses the first light-emitting surface 11 as a stepped Fresnel vertical stripe, but those skilled in the art will understand that continuous curved surfaces or other types of stepped patterned surfaces are also feasible.

[0157] In at least some embodiments of this specification, the provided automotive lighting optical system, such as Figures 21 to 26 As shown, the light-emitting structure 1 in the optical unit 100 may specifically include a second light-emitting surface 12, a second light-incident surface 13, and a third light-emitting surface 14 arranged sequentially along the optical path; the light-receiving structure 2 is configured to form an intermediate light image at the common focal plane of the second light-emitting surface 12, the second light-incident surface 13, and the third light-emitting surface 14, and the second light-emitting surface 12, the second light-incident surface 13, and the third light-emitting surface 14 are configured to image the intermediate light image onto the front of the vehicle lamp optical system.

[0158] Figures 21 to 24 A perspective view of another vehicle lamp optical system provided by the embodiments of the present specification is shown. As Figures 21 to 24 indicated in the above, in the process of forming the second light exit surface 12, the second light entrance surface 13 and the third light exit surface 14, the optical element 100 can be formed as two independent parts (as Figures 21 to 23 indicated in the above), or can also be integrally formed and have a connecting structure between the second light exit surface 12 and the second light entrance surface 13 (as Figure 24 indicated in the above).

[0159] As Figure 21 indicated in the above, the vehicle lamp optical system provided by the embodiments of the present specification mainly differs from the vehicle lamp optical system shown in Figure 1 in that the light exit structure 1 is different. Figure 1 The light exit structure 1 of the optical unit 100 in the vehicle lamp optical system of the embodiments of the present specification specifically includes the first light exit surface 11, while Figure 21 The light exit structure 1 of the optical unit 100 in the vehicle lamp optical system of the embodiments of the present specification specifically includes the second light exit surface 12, the second light entrance surface 13 and the third light exit surface 14; therefore, the description regarding other structures except the light exit structure 1 can refer to the relevant description of the above examples, and will not be repeated here. It needs to be explained that, compared with Figure 1 , Figure 21 , Figure 1 the subtle structure such as the chamfer between the reflecting surface 22 and each side surface of the optical unit 100 in the above is set to adapt to the actual production needs, and does not have technical influence on the implementation of the technical solutions of the embodiments of the present specification, and can not be concerned. Similarly, Figure 22 has a corresponding relationship with Figure 8 , Figure 23 has a corresponding relationship with Figure 9 , and the relevant description can refer to the above.

[0160] As Figure 25 indicated in the above, a longitudinal sectional view of an optical unit in a vehicle lamp optical system corresponding to Figure 22 or Figure 23 provided by the embodiments of the present specification is shown. As Figure 26 indicated in the above, a transverse sectional view of an optical unit in a vehicle lamp optical system corresponding to Figure 21 or Figure 22 or Figure 23 provided by the embodiments of the present specification is shown. And specifically, the propagation direction of light in the optical unit is schematically shown in Figure 25 and Figure 26 .

[0161] In at least part of the embodiments, the second light exit surface 12 can be configured to control the lateral distribution of light rays.

[0162] In at least some embodiments, the second light exit surface 12 can include one or more optical surfaces configured to adjust the propagation direction of light in the left-right direction. Optionally, at least some of the one or more optical surfaces included in the second light exit surface 12 can cause light to converge in the left-right direction; additionally optionally, at least some of the one or more optical surfaces included in the second light exit surface 12 can cause light to diverge in the left-right direction.

[0163] As shown in FIG. 1, the second light exit surface 12 can include one or more optical surfaces configured to adjust the propagation direction of light in the up-down direction. Optionally, at least some of the one or more optical surfaces included in the second light exit surface 12 can cause light to converge to some extent in the up-down direction. Figure 26 As shown in FIG. 1, the second light exit surface 12 can include one or more optical surfaces configured to adjust the propagation direction of light in the up-down direction. Optionally, at least some of the one or more optical surfaces included in the second light exit surface 12 can cause light to converge to some extent in the up-down direction.

[0164] In at least some embodiments, the second light exit surface 12, the second light entrance surface 13, and the third light exit surface 14 can be configured to jointly control the vertical distribution of light.

[0165] In at least some embodiments, at least one of the second light exit surface 12, the second light entrance surface 13, and the third light exit surface 14 can include one or more optical surfaces configured to adjust the propagation direction of light in the up-down direction. Optionally, at least some of the one or more optical surfaces included in the at least one of the second light exit surface 12, the second light entrance surface 13, and the third light exit surface 14 can cause light to converge to some extent in the up-down direction.

[0166] In actual applications, the second light exit surface 12 can be configured to determine the left-right direction focal point of light, and more specifically, the left-right direction focal point of at least some of the optical surfaces included in the second light exit surface 12 can be at the common focal plane. The second light exit surface 12, the second light entrance surface 13, and the third light exit surface 14 can be configured to jointly determine the up-down direction focal point of light, and more specifically, the up-down direction focal point of at least some of the optical surfaces included in the second light exit surface 12, the second light entrance surface 13, and the third light exit surface 14 can be at the common focal plane.

[0167] In at least some embodiments of the present specification, the provided vehicle light optical system, as shown in the basic optical unit of the optical unit shown in Figures 21 to 26 , can further include a cutoff line structure as shown in Figures 10 to 18 .

[0168] Optionally, as shown in Figures 10 to 14 , the light collecting structure 2 can further include a first cutoff line structure on the reflective surface 22, the first cutoff line structure being configured to destroy the reflection of the local reflective surface 22; the second light exit surface 12 (see Figures 21 to 26The focal point in the left-right direction is located at the first cutoff line structure; the second light-emitting surface 12, the second light-incident surface 13, and the third light-emitting surface 14 (see Figures 21 to 26 The focal point in the vertical direction is located at the first cutoff line structure.

[0169] Optionally, such as Figures 15 to 18 As shown, the optical unit 100 further includes a second cutoff line structure located downstream of the reflecting surface 22 in the optical path. The second cutoff line structure is configured to block a portion of the light rays incident from the reflecting surface 22 onto the light-emitting structure 1; the second light-emitting surface 12 (see...) Figures 21 to 26 The focal point in the left-right direction is located at the second cutoff line structure; the second light-emitting surface 12, the second light-incident surface 13, and the third light-emitting surface 14 (see Figures 21 to 26 The focal point in the vertical direction is located at the second cutoff line structure.

[0170] As described in this instruction manual Figures 21 to 26 In the illustrated embodiment, the first light-incident surface 21, the reflecting surface 22, the second light-exiting surface 12, the second light-incident surface 13, and the third light-exiting surface 14 can be arranged sequentially along the optical path. The first light-incident surface 21 is close to the light source 200 and collects light. The reflecting surface 22 performs secondary light distribution and total internal reflection on the light emitted from the light source 200, so that the light is emitted after its propagation direction is adjusted by the second light-exiting surface 12, the second light-incident surface 13, and the third light-exiting surface 14, forming a light pattern. In practical applications, the optical system described in the above embodiment can form a target light pattern or a part of a target light pattern in the traffic space in front of a vehicle equipped with a headlight module containing the optical system components.

[0171] The arrangement of the light-collecting structure 2 and the light source 200 can be consistent with the embodiment described above, see [link to previous document]. Figures 7 to 16 The relevant descriptions will not be repeated here.

[0172] In at least some embodiments of this specification, the provided vehicle lighting optical system may include a low beam three-zone structure for forming a low beam three-zone light pattern in the target light pattern of the vehicle lighting optical system, so that the vehicle lighting optical system meets the regulatory three-zone requirements.

[0173] Specifically, a near-beam three-zone structure can be provided on the upper and / or lower surface of the optical unit 100. Optionally, the near-beam three-zone structure may include a first near-beam three-zone structure, which can be configured as an outwardly convex structure or an inwardly concave structure on the upper surface of the optical unit 100. Optionally, the near-beam three-zone structure may include a second near-beam three-zone structure, which can be configured as an outwardly convex structure or an inwardly concave structure on the lower surface of the optical unit 100.

[0174] In addition, in an optional embodiment, a coating and / or a pattern can be added to the upper side and / or the lower side of the optical unit 100. In this way, the system stray light can be optimized.

[0175] In addition, in an optional embodiment, the upper side and the lower side of the optical system of the vehicle lamp provided in the embodiments of the present disclosure can be configured to be hidden in the decorative frame or protrude from the decorative frame according to the actual modeling needs.

[0176] It should be noted that the drawings do not show all the embodiments of the present application, and those skilled in the art can obtain more embodiments of the present application according to the combination of the features described in the present disclosure. For example, although the drawings show that the reflective surface and the light entrance surface of the optical unit 100 are not chamfered, it can be understood that in actual application, due to manufacturing process and other reasons, there can be a chamfered surface between the reflective surface and the light entrance surface. The examples given herein are not exhaustive. Figure 1

[0177] In addition, although the front end and the rear end of the optical unit 100 shown in the drawings are substantially the same size, in at least some embodiments of the present disclosure, the shape of the optical unit 100 is not limited to the examples shown in the drawings.

[0178] Optionally, the shape of the longitudinal section of the optical unit 100 perpendicular to the front-rear direction can be any shape, for example, rectangular, right trapezoidal (isosceles or non-isosceles), inverted trapezoidal (isosceles or non-isosceles), diamond-shaped, other shapes, etc. In actual application, the upper side and the lower side of the optical unit 100 can be equal or unequal in width.

[0179] Optionally, the sizes of the plurality of longitudinal sections of the optical unit 100 perpendicular to the front-rear direction can be the same or different. For example, the area of the longitudinal section of the light transmission main body portion of the optical unit 100 close to the light exit side can be equal to or less than the area of the longitudinal section close to the light entrance side. In actual application, the opening size of the front end light exit side of the optical unit 100 can be less than or equal to the size of the light entrance port of the rear end of the optical unit 100. By setting the size of the light exit side to be smaller than the size of the light entrance side, the overall size of the optical unit 100 can be reduced.

[0180] ​Based on the embodiments of this specification, the optical unit 100 is a one-piece molded component, replacing the existing automotive lamp optical assembly which includes at least multiple parts such as a light-collecting structure and an outer lens. This results in lower material costs, reduces assembly steps, lowers assembly difficulty, and increases production speed. Simultaneously, fewer parts mean fewer component and assembly tolerances, reducing manufacturing costs while improving the manufacturing and assembly precision of the automotive lamp module, thus enhancing product quality and performance stability. Compared to traditional solutions, in the optical unit 100 provided by the embodiments of this specification, at least one focal point of the light-emitting structure 1 is located at or near the reflecting surface 22, significantly reducing the longitudinal length of the automotive lamp optical system composed of the optical unit 100. Furthermore, it reduces the number of refractive surfaces through which light passes, and since the light is transmitted within the medium, light utilization efficiency is higher. Therefore, the structure is simple and efficient, and the light channel and light-emitting surface can be made smaller. Thus, the smaller component size of the automotive lamp optical system provided by the embodiments of this specification allows for greater freedom in overall lamp design, improving aesthetics while reducing the complexity of overall lamp structure design. Currently, the height of common automotive lamp optical components on the market is typically above 25mm, while the height and width of the light-emitting structure 1 of the optical unit 100 provided in the embodiments of this specification can be within 5mm, which is much smaller than the size of conventional solutions on the market. The smaller light-emitting surface makes the automotive lamp optical system occupy less space and is more aesthetically pleasing, which can reduce the difficulty of overall lamp structure design and bring greater freedom in overall lamp shape design.

[0181] Furthermore, when constructing an optical system, by setting the light source 200 adjacent to the first light-incident surface 21, and setting the light source 200 and the reflecting surface 22 such that the incident angle formed by the light rays from the main light-emitting direction of the light source 200 incident on the reflecting surface 22 and the reflecting surface 22 is greater than or equal to a first preset angle; and the angle difference between the first preset angle and the critical angle of total internal reflection of the material of the optical unit 100 is less than or equal to 2 degrees, it is possible to achieve the required maximum brightness value and light efficiency of the light pattern without coating the reflecting surface 22.

[0182] In at least some embodiments of this specification, the vehicle lighting optical system may further include one or more optical units 100.

[0183] Specifically, when the automotive lighting optical system includes multiple optical units 100, the multiple optical units 100 may optionally be integrally formed; or alternatively, the multiple optical units 100 may be individually formed and then spliced ​​together. In practical applications, the actual number of optical units 100 included in the automotive lighting optical system can be determined according to the requirements of luminous flux and optical performance.

[0184] In practical applications, when a vehicle lighting optical system includes multiple optical units 100, any two of the multiple optical units 100 can have different reflection angles and convergence degrees for light, that is, they can be constructed according to the actual light pattern design requirements.

[0185] For example, Figure 27 The image shows an example of a one-piece automotive lighting optical system comprising five optical units 100. For example, Figure 28 The diagram shows a vehicle lighting optical system consisting of a first part comprising two optical units 100 and a second part comprising three optical units 100, both integrally formed.

[0186] It is understandable that the combination of multiple optical units 100 can be set according to actual needs, and is not limited to the aforementioned configuration. Figure 27 and Figure 28 The grouping is illustrated in the example. Furthermore, Figure 28 The relative positions between the different groups shown are only one example. In practical applications, multiple optical units 100 can be combined in various ways, such as... Figure 27 and Figure 28 The horizontal arrangement shown can also be combined into various shapes such as vertical arrangement, C-shape, L-shape, etc., to meet the needs of the overall lamp design.

[0187] Furthermore, when the vehicle lighting optical system includes multiple optical units 100, the system may also include a combination of light sources 200 corresponding to the multiple optical units 100. Specifically, the multiple light sources 200 may be arranged in a manner adapted to the arrangement of the multiple optical units 100, such that the incident angle of the light rays incident on the reflecting surface 22 of each optical unit 100 is greater than a certain angle value, so that most of the incident light rays are totally internalized and emitted from the light-emitting structure 1 to form a light pattern.

[0188] In at least some embodiments of this specification, a vehicle lighting module is also provided, the vehicle lighting module including a vehicle lighting optical system.

[0189] Optionally, the vehicle lamp optical system comprises an optical unit 100 and a light source 200; the front end of the optical unit 100 is provided with a light emitting structure 1, and the rear end is provided with a light collecting structure 2, the light collecting structure 2 comprises a first light incident surface 21 and a reflecting surface 22; the light source 200 is arranged adjacent to the first light incident surface 21; the light incident from the first light incident surface 21 is reflected by the reflecting surface 22 and then emitted from the light emitting structure 1 to form a target light pattern in front of the vehicle lamp optical system; wherein the light source 200 and the reflecting surface 22 are arranged such that the angle of incidence formed by the light rays of the main light emitting direction of the light source 200 incident to the reflecting surface 22 is greater than or equal to a first preset angle; the angle difference between the first preset angle and the critical angle of total reflection of the material of the optical unit 100 is less than or equal to 2 degrees.

[0190] In at least some embodiments of the present specification, a vehicle is also provided, comprising a vehicle lamp module, the vehicle lamp module comprising the vehicle lamp optical system described in the foregoing embodiments.

[0191] In actual application, the vehicle can be a motor vehicle, which can include but is not limited to a car, a motorcycle, an electric vehicle, a rail or railless trolley bus, an agricultural transport vehicle, etc., and the type of the vehicle is not specifically limited in the present application.

[0192] One or more embodiments of the present specification provide a vehicle lamp optical system, a vehicle lamp module and a vehicle. Specifically, a vehicle lamp optical system is constructed, comprising an optical unit 100 and a light source 200; the front end of the optical unit 100 is provided with a light emitting structure 1, and the rear end is provided with a light collecting structure 2, the light collecting structure 2 comprises a first light incident surface 21 and a reflecting surface 22; the light source 200 is arranged adjacent to the first light incident surface 21; the light incident from the first light incident surface 21 is reflected by the reflecting surface 22 and then emitted from the light emitting structure 1 to form a target light pattern in front of the vehicle lamp optical system; wherein the light source 200 and the reflecting surface 22 are arranged such that the angle of incidence formed by the light rays of the main light emitting direction of the light source 200 incident to the reflecting surface 22 is greater than or equal to a first preset angle; the angle difference between the first preset angle and the critical angle of total reflection of the material of the optical unit 100 is less than or equal to 2 degrees. And a vehicle lamp module and a vehicle based on the vehicle lamp optical system are constructed.

[0193] Thus, at least the following beneficial effects can be achieved:

[0194] First, the provided vehicle lamp optical system has a smaller light emitting surface, and the height and width of a single optical unit can be within 5mm. The number of units required for complete functionality depends on the power of the light source used and the spot performance requirements. Smaller light emitting surfaces make the vehicle lamp optical system occupy less space and be more aesthetically pleasing, which can reduce the difficulty of the overall lamp structure design and bring higher freedom of overall lamp modeling design. By reducing the number of parts of the current common vehicle lamp module scheme (for example, an integrally formed thick-walled lens to realize the lighting function of the vehicle lamp module), not only is the material cost lower, but the assembly process is also reduced, the assembly difficulty is reduced, and the production speed is improved. Fewer parts mean fewer part tolerances and assembly tolerances, which can improve the stability of the quality and performance of the vehicle lamp module and the vehicle lamp.

[0195] Second, by reasonably setting the position of the light source relative to the reflecting surface, the main light emitting direction of the light source is incident to the reflecting surface, and the incident angle formed by the light and the reflecting surface is greater than or equal to a first preset angle determined based on the critical angle of total reflection of the material of the optical unit. Thus, without the need for a reflective coating on the reflecting surface, the maximum luminance value and light efficiency of the light type that meets the conditions can be achieved, and even better results than using a reflective coating can be achieved, overcoming technical biases and achieving unexpected technical effects.

[0196] The above describes specific embodiments of the present specification. Other embodiments are within the scope of the appended claims. The above is only an embodiment of the present application and is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the scope of the claims of the present application.

Claims

1. A vehicle lamp optical system characterized by comprising: The vehicle lamp optical system comprises an optical unit (100) and a light source (200); the front end of the optical unit (100) is provided with a light emitting structure (1), and the rear end is provided with a light collecting structure (2), the light collecting structure (2) comprises a first light entering surface (21) and a reflecting surface (22); the light source (200) is arranged adjacent to the first light entering surface (21); the light incident from the first light entering surface (21) is reflected by the reflecting surface (22) and then emitted from the light emitting structure (1) to form a target light pattern in front of the vehicle lamp optical system. The light source (200) and the reflecting surface (22) are arranged such that the light rays incident from the main light emitting direction of the light source (200) to the reflecting surface (22) form an incident angle with the reflecting surface (22) greater than or equal to a first preset angle; the angle difference between the first preset angle and the critical angle of total reflection of the material of the optical unit (100) is less than or equal to 2 degrees.

2. The vehicle lamp optical system of claim 1, wherein, The reflecting surface (22) is a total reflecting surface.

3. The vehicle lamp optical system of claim 2, wherein, The light source (200) and the reflecting surface (22) are arranged such that the light rays incident from the main light emitting direction of the light source (200) to the reflecting surface (22) form an incident angle with the reflecting surface (22) greater than or equal to a first angle; the first angle is 37 degrees to 40 degrees.

4. The vehicle lamp optical system of claim 3, wherein, The light source (200) and the reflecting surface (22) are arranged such that the light rays incident from the main light emitting direction of the light source (200) to the reflecting surface (22) form an incident angle with the reflecting surface (22) greater than or equal to a second angle; the second angle is 44 degrees to 46 degrees.

5. The vehicle lamp optical system of claim 4, wherein, The light source (200) and the reflecting surface (22) are arranged such that the light rays incident from the main light emitting direction of the light source (200) to the reflecting surface (22) form an incident angle with the reflecting surface (22) greater than or equal to a third angle; the third angle is 50 degrees.

6. The vehicle lamp optical system of claim 1, wherein, The light collecting structure (2) further comprises a first cutoff line structure on the reflecting surface (22), the first cutoff line structure is configured to destroy the reflecting effect of the local reflecting surface (22); at least one focal point of the light emitting structure (1) is located at the first cutoff line structure.

7. The vehicle lamp optical system of claim 6, wherein, The light collecting structure (2) specifically comprises a cutting surface (23) cut from the reflecting surface (22), the shape of the first intersection line (201) between the reflecting surface (22) and the cutting surface (23) is adapted to the shape of the light pattern cutoff line; Alternatively, the reflecting surface (22) of the light collecting structure (2) comprises a first area (221) coated with a high absorption material on the outside and a second area (222) not coated with a high absorption material, the shape of the boundary line (202) between the first area (221) and the second area (222) is adapted to the shape of the light pattern cutoff line; Alternatively, the optical unit (100) further comprises a first splicing portion (3) located at the rear end of the light-receiving structure (2), the first splicing portion (3) is composed of non-transparent material, and the shape of the splicing interface between the first splicing portion (3) and the light-receiving structure (2) is adapted to the shape of the second intersection line (203) of the reflecting surface (22) and the light type cutoff line.

8. The vehicle lamp optical system of claim 1, wherein, The optical unit (100) further comprises a second cutoff line structure located downstream of the reflecting surface (22) in the optical path, the second cutoff line structure is configured to block part of the light rays emitted from the reflecting surface (22) to the light-emitting structure (1); at least one focal point of the light-emitting structure (1) is located at the second cutoff line structure.

9. The vehicle lamp optical system of claim 8, wherein, The second cutoff line structure comprises a groove (4) located in the lower side area of the optical unit (100); the groove (4) comprises a first side (41) close to the light-receiving structure (2) and a second side (42) away from the light-receiving structure (2), and the shape of the third intersection line (401) between the first side (41) and the second side (42) is adapted to the shape of the light type cutoff line.

10. The vehicle lamp optical system of claim 9, wherein, The optical unit (100) further comprises a second splicing portion (5) located in the groove (4), the second splicing portion (5) is composed of non-transparent material; Alternatively, At least one of the first side (41) and the second side (42) is coated with high-absorption material or high-reflectivity material.

11. The vehicle lamp optical system of claim 1, wherein, The light-emitting structure (1) specifically comprises a first light-emitting surface (11); the light-receiving structure (2) is configured to form an intermediate light image at the focal plane of the first light-emitting surface (11), and the first light-emitting surface (11) is configured to image the intermediate light image to the front of the vehicle lamp optical system.

12. The vehicle lamp optical system of claim 1, wherein, The light-emitting structure (1) specifically comprises a second light-emitting surface (12), a second light-receiving surface (13) and a third light-emitting surface (14) arranged in sequence in the optical path; the light-receiving structure (2) is configured to form an intermediate light image at the common focal plane of the second light-emitting surface (12), the second light-receiving surface (13) and the third light-emitting surface (14), and the second light-emitting surface (12), the second light-receiving surface (13) and the third light-emitting surface (14) are configured to image the intermediate light image to the front of the vehicle lamp optical system.

13. The vehicle lamp optical system of claim 12, wherein, The second light-emitting surface (12) is configured to control the lateral distribution of light rays.

14. The vehicle lamp optical system of claim 13, wherein, The second light-emitting surface (12) comprises one or more optical surfaces configured to adjust the propagation direction of light rays in the left-right direction.

15. The vehicle lamp optical system of claim 13, wherein, The second light-emitting surface (12), the second light-receiving surface (13) and the third light-emitting surface (14) are configured to jointly control the vertical distribution of light rays.

16. The vehicle lamp optical system of claim 15, wherein, At least one of the second light-emitting surface (12), the second light-receiving surface (13) and the third light-emitting surface (14) comprises one or more optical surfaces configured to adjust the propagation direction of light rays in the up-down direction.

17. The vehicle lamp optical system of claim 12, wherein, The light-receiving structure (2) further comprises a first cut-off line structure on the reflecting surface (22), the first cut-off line structure being configured to destroy the reflecting function of a part of the reflecting surface (22); the focus in the left-right direction of the second light-out surface (12) is located at the first cut-off line structure; the focus in the up-down direction of the second light-out surface (12), the second light-in surface (13) and the third light-out surface (14) is located at the first cut-off line structure.

18. The vehicle lamp optical system of claim 12, wherein, The optical unit (100) further comprises a second cut-off line structure downstream of the reflecting surface (22) in the optical path, the second cut-off line structure being configured to block part of the light rays from the reflecting surface (22) to the light-out structure (1); the focus in the left-right direction of the second light-out surface (12) is located at the second cut-off line structure; the focus in the up-down direction of the second light-out surface (12), the second light-in surface (13) and the third light-out surface (14) is located at the second cut-off line structure.

19. A vehicle lamp module, characterized by A vehicle lamp optical system comprising any one of claims 1 to 18.

20. A vehicle characterized by comprising: A vehicle lamp module comprising claim 19.

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