Vehicle lamp optical system, vehicle lamp module and vehicle

Abstract

The embodiment of the invention 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 field of vehicle lighting technology, and in particular to a vehicle light optical system, a vehicle light module and a vehicle. Background Art

[0002] At present, common headlight modules, in addition to the light board, driver and bracket, usually include multiple components such as external lens and light collection structure (including reflector bowl and lens solution). When the light pattern requires a cutoff line, it is also necessary to set up a cutoff line baffle and other components. The large number of parts in the headlight module makes the overall size large and the structure complex, introducing more tolerances (including errors of individual parts and assembly errors), reducing the yield rate, and the more materials and assembly links caused by multiple parts also lead to higher production costs.

[0003] In the related art, an optical unit with a simple structure, high efficiency and small size is proposed. The front end of the optical unit is provided with a light emitting surface, and the rear end is provided with a light collecting structure. The light collecting structure includes a light incident surface and a reflective surface, and the reflective surface is constructed so that the light incident from the light incident surface is reflected by the reflective surface and then emitted from the light emitting surface to form a target light pattern in front of the headlight optical system. Such a headlight optical system reduces the manufacturing cost and is conducive to improving the manufacturing and assembly accuracy of the headlight module. However, in order to make the light intensity maximum point and efficiency on the brightness distribution of the target light pattern meet the requirements of this integrated optical unit using a side-light-entering reflective structure, it is usually necessary to coat the outer side of the reflective surface with a reflective coating or add a conformal reflector. The operation of coating the outer side of the reflective surface with a reflective coating or adding a conformal reflector will bring about problems such as high manufacturing cost and high process difficulty. Summary of the invention

[0004] The embodiments of this specification provide a headlight optical system, a headlight module and a vehicle to solve the problem that if a headlight optical system using an integrated optical unit with a side-light reflection structure wants to achieve a target light type with a maximum light intensity point and efficiency that meet the requirements, it will lead to high manufacturing costs and great process difficulties.

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

[0006] An embodiment of the present specification provides a headlight optical system, which includes an optical unit 100 and a light source 200; a light emitting structure 1 is provided at the front end of the optical unit 100, and a light receiving structure 2 is provided at the rear end, wherein the light receiving structure 2 includes a first light incident surface 21 and a reflecting surface 22; the light source 200 is arranged to be adjacent to the first light incident surface 21; 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 headlight optical system; wherein the light source 200 and the reflecting surface 22 are arranged such that an incident angle formed by light incident from the main light emitting direction of the light source 200 to the reflecting surface 22 and the reflecting surface 22 is greater than or equal to a first preset angle; and an angle difference between the first preset angle and a critical angle for total reflection of the material of the optical unit 100 is less than or equal to 2 degrees.

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

[0008] Optionally, the light source 200 and the reflecting surface 22 are configured such that an incident angle formed by light incident from a main light emitting direction of the light source 200 to the reflecting surface 22 and the reflecting surface 22 is 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 configured such that an incident angle formed by light incident from the main light emitting direction of the light source 200 to the reflecting surface 22 and the reflecting surface 22 is 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 reflective surface 22 are configured such that an incident angle formed by light incident from a main light emitting direction of the light source 200 to the reflective surface 22 and the reflective surface 22 is greater than or equal to a third angle; the third angle is 50 degrees.

[0011] Optionally, the light collecting structure 2 further includes a first cut-off line structure located on the reflective surface 22 , and the first cut-off line structure is configured to destroy the local reflective effect of the reflective surface 22 ; at least one focus of the light emitting structure 1 is located at the first cut-off line structure.

[0012] Optionally, the light collecting structure 2 specifically includes a cutting surface 23 formed by cutting the reflecting surface 22, and the shape of a first boundary line 201 between the reflecting surface 22 and the cutting surface 23 is adapted to the shape of a light type cut-off line.

[0013] Optionally, the reflective surface 22 of the light collecting structure 2 includes a first area 221 coated with a high absorption material on the outside and a second area 222 not coated with the high absorption material, and 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 cutoff line.

[0014] Optionally, the optical unit 100 also includes a first splicing part 3 located at the rear end of the light collecting structure 2, the first splicing part 3 is made of non-transparent material, and the shape of the second boundary line 203 of the splicing interface between the first splicing part 3 and the light collecting structure 2 and the reflecting surface 22 is adapted to the shape of the light type cut-off line.

[0015] Optionally, the optical unit 100 further includes a second cutoff line structure located downstream of the reflective surface 22 on the optical path, the second cutoff line structure being configured to block a portion of the light emitted from the reflective surface 22 toward the light emitting structure 1; at least one focus of the light emitting structure 1 is located at the second cutoff line structure.

[0016] Optionally, the second cut-off line structure includes a groove 4 located in the lower side area of ​​the optical unit 100; the groove 4 includes 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 the third boundary line 401 between the first side 41 and the second side 42 is adapted to the shape of the light type cut-off line.

[0017] Optionally, the optical unit 100 further includes 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 surface 41 and the second side surface 42 is coated with a high absorption material or a high reflection material.

[0019] Optionally, the light emitting structure 1 specifically includes a first light emitting surface 11; the light receiving structure 2 is constructed to form an intermediate light image at a focal plane of the first light emitting surface 11, and the first light emitting surface 11 is constructed to image the intermediate light image in front of the headlight optical system.

[0020] Optionally, the light emitting structure 1 specifically includes a second light emitting surface 12, a second light incident surface 13 and a third light emitting surface 14 which are arranged in sequence along the light path; the light collecting structure 2 is constructed to form an intermediate light image at a 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 constructed to image the intermediate light image in front of the headlight optical system.

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

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

[0023] Optionally, the second light emitting surface 12 , the second light incident surface 13 and the third light emitting surface 14 are configured to jointly control the vertical distribution of light.

[0024] Optionally, at least one of the second light emitting surface 12, the second light incident surface 13 and the third light emitting surface 14 includes one or more optical surfaces configured to adjust the propagation direction of the light in the up and down directions.

[0025] Optionally, the light collecting structure 2 also includes a first cutoff line structure located on the reflecting surface 22, and the first cutoff line structure is constructed to destroy the local reflection effect of the reflecting surface 22; the focus of the second light emitting surface 12 in the left and right directions is located at the first cutoff line structure; the focus of the second light emitting surface 12, the second light incident surface 13 and the third light emitting surface 14 in the up and down directions is located at the first cutoff line structure.

[0026] Optionally, the optical unit 100 also includes a second cut-off line structure located downstream of the reflecting surface 22 on the optical path, and the second cut-off line structure is constructed to block part of the light emitted from the reflecting surface 22 to the light emitting structure 1; the focus of the second light emitting surface 12 in the left and right directions is located at the second cut-off line structure; the focus of the second light emitting surface 12, the second light incident surface 13 and the third light emitting surface 14 in the up and down directions is located at the second cut-off line structure.

[0027] An embodiment of the present specification provides a vehicle light module, including a vehicle light optical system as provided in the embodiment of the present specification.

[0028] A vehicle provided in an embodiment of the present specification includes a vehicle light module provided in an embodiment of the present specification.

[0029] One embodiment of the present specification can at least achieve the following beneficial effects: a headlight optical system is constructed, including an optical unit and a light source; a light emitting surface is provided at the front end of the optical unit, and a light collecting structure is provided at the rear end, the light collecting structure includes a light incident surface and a reflecting surface; the reflecting surface is constructed so that light incident from the light incident surface is reflected by the reflecting surface and then emitted from the light emitting surface to form a target light pattern in front of the headlight optical system; wherein the light source and the reflecting surface are configured such that an incident angle formed by a light ray incident on the reflecting surface from the main light emitting direction of the light source and the reflecting surface is greater than or equal to a first preset angle; an angle difference between the first preset angle and a critical angle of total reflection of a material of the optical unit is less than or equal to a first preset angle; less than 2 degrees; thereby, it is possible to reduce the size of the headlight optical system, realize the headlight lighting function in a simple structure, high efficiency and small size, reduce manufacturing costs, and help improve the manufacturing and assembly accuracy of the headlight module, bringing higher freedom in the design of the entire lamp shape; and on this basis, by reasonably setting the positions of the light source and the reflecting surface, the incident angle formed by the light from the main light emission direction of the light source incident on the reflecting surface and the reflecting surface is greater than or equal to a first preset angle determined based on the total reflection critical angle of the material of the optical unit, thereby, without the need to apply a reflective coating on the reflecting surface, the maximum brightness value and light efficiency of the light type that meet the conditions can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0031] Figure 1 A stereogram of a vehicle light optical system provided by an embodiment of this specification is shown;

[0032] Figure 2 A longitudinal cross-sectional view of an optical unit in a vehicle light optical system provided by an embodiment of the present specification is shown;

[0033] Figure 3A schematic diagram of a light effect simulation result of an optical unit provided by an embodiment of the present specification is shown, wherein the optical unit is made of PC material: as in at least some embodiments of the present specification, when a reflective coating is not coated on the outer side of the reflective surface or a conformal reflector is not added, a schematic diagram of light propagation when the angle of incidence formed by the light from the main light emitting direction of the light source incident on the reflective surface and the reflective surface is 45 degrees (a) and a light intensity contour diagram of the light image formed (b); and, as in the case where a reflective coating is coated on the outer side of the reflective surface in the related art, a schematic diagram of light propagation when the angle of incidence formed by the light from the main light emitting direction of the light source incident on the reflective surface and the reflective surface is 45 degrees (c) and a light intensity contour diagram of the light image formed (d);

[0034] Figure 4 A schematic diagram of the simulation result of the optical effect of an optical unit provided by an embodiment of the present specification is shown, wherein the optical unit is made of PC material: as in at least some embodiments of the present specification, when the reflective coating is not coated on the outer side of the reflective surface or a conformal reflector is not added, a schematic diagram of the propagation of light when the angle of incidence formed by the light from the main light-emitting direction of the light source incident on the reflective surface and the reflective surface is 50 degrees (a) and a light intensity contour diagram of the light image formed (b); and, as in the case where the reflective coating is coated on the outer side of the reflective surface in the related art, a schematic diagram of the propagation of light when the angle of incidence formed by the light from the main light-emitting direction of the light source incident on the reflective surface and the reflective surface is 50 degrees (c) and a light intensity contour diagram of the light image formed (d);

[0035] Figure 5 A schematic diagram of the simulation result of the optical effect of an optical unit provided by an embodiment of the present specification is shown, wherein the optical unit is made of PC material: as in at least some embodiments of the present specification, when a reflective coating is not coated on the outer side of the reflective surface or a conformal reflector is not added, a schematic diagram of the propagation of light when the angle of incidence formed by the light from the main light-emitting direction of the light source incident on the reflective surface and the reflective surface is 55 degrees (a) and a light intensity contour diagram of the light image formed (b); and, as in the related art, when a reflective coating is coated on the outer side of the reflective surface, a schematic diagram of the propagation of light when the angle of incidence formed by the light from the main light-emitting direction of the light source incident on the reflective surface and the reflective surface is 55 degrees (c) and a light intensity contour diagram of the light image formed (d);

[0036] Figure 6 The optical effect simulation data of an optical unit provided by an embodiment of the present specification are shown: when the optical unit is made of PC material or PMMA material, the simulation experimental results of the maximum light intensity value of the light image when the incident angles formed by the light from the main light emitting direction of the light source incident on the reflective surface and the reflective surface are different angles; wherein the horizontal axis represents the angle between the incident angle and the exit angle; the vertical axis represents the maximum brightness value, in candela (cd);

[0037] Figure 7 The optical effect simulation data of an optical unit provided by an embodiment of the present specification are shown: when the optical unit is made of PC material or PMMA material, the simulation experimental results of the light efficiency when the incident angles formed by the light from the main light emitting direction of the light source incident on the reflective surface and the reflective surface are different angles; wherein the horizontal axis represents the 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 stereoscopic diagram of an optical unit with a cut-off line structure included in a vehicle light optical system provided in an embodiment of the present specification is shown;

[0039] Fig. 9 A three-dimensional diagram of an optical unit with a cut-off line structure included in another vehicle light optical system provided by an embodiment of the present specification is shown;

[0040] Fig.10 A schematic diagram showing a position of a first cut-off line structure provided in an optical unit according to an embodiment of the present specification;

[0041] Fig.11 A partial three-dimensional schematic diagram of an optical unit provided with a first cut-off line structure provided in an embodiment of this specification is shown;

[0042] Fig.12 A partial three-dimensional schematic diagram of another optical unit provided with a first cut-off line structure provided in an embodiment of this specification is shown;

[0043] Fig.13 A partial three-dimensional schematic diagram of another optical unit provided with a first cut-off line structure provided in an embodiment of this specification is shown;

[0044] Fig.14 A partial longitudinal cross-sectional schematic diagram of another optical unit provided with a first cut-off line structure provided in an embodiment of this specification is shown;

[0045] Fig.15 A schematic diagram showing a position of a second cut-off line structure provided in an optical unit according to an embodiment of the present specification;

[0046] Fig.16 A partial three-dimensional schematic diagram of an optical unit provided with a second cut-off line structure provided in an embodiment of this specification is shown;

[0047] Fig.17 A partial longitudinal cross-sectional schematic diagram of an optical unit provided with a second cut-off line structure provided in an embodiment of this specification is shown;

[0048] Fig.18A partial longitudinal cross-sectional schematic diagram of another optical unit provided with a second cut-off line structure provided in an embodiment of this specification is shown;

[0049] Fig.19 A schematic diagram showing the structure of a light emitting surface of an optical unit of a vehicle light optical system provided in an embodiment of this specification;

[0050] Fig. 20 A schematic diagram showing the structure of a light emitting surface of an optical unit of another vehicle light optical system provided in an embodiment of this specification;

[0051] Fig.21 A perspective view of another vehicle light optical system provided by an embodiment of this specification is shown;

[0052] Fig. 22 A three-dimensional diagram of an optical unit with a cut-off line structure included in another vehicle light optical system provided by an embodiment of the present specification is shown;

[0053] Fig.23 A three-dimensional diagram of an optical unit with a cut-off line structure included in another vehicle light optical system provided by an embodiment of the present specification is shown;

[0054] Fig.24 A three-dimensional diagram of an optical unit with a cut-off line structure included in another vehicle light optical system provided by an embodiment of the present specification is shown;

[0055] Fig.25 A longitudinal cross-sectional view of an optical unit in a vehicle light optical system provided by an embodiment of the present specification is shown;

[0056] Fig.26 A cross-sectional view of an optical unit in a vehicle light optical system provided by an embodiment of the present specification is shown;

[0057] Fig. 27 A perspective view of a vehicle light optical system including a plurality of optical units provided in an embodiment of the present specification is shown;

[0058] Fig.28 A layout perspective view of a vehicle light optical system including a plurality of optical units provided in an embodiment of the present specification is shown.

[0059] Description of reference numerals in the figures:

[0060] 100 - optical unit;

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

[0062] 2-light collecting structure; 21-first light incident surface; 22-reflection surface; 221-first area; 222-second area; 23-cutting surface; 201-first boundary line; 202-dividing 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- the second splicing part;

[0066] 200-light source;

[0067] 300-Printed Circuit Board. DETAILED DESCRIPTION

[0068] In order to make the purpose, technical solutions and advantages of one or more embodiments of this specification clearer, the technical solutions of one or more embodiments of this specification will be clearly and completely described below in combination with the specific embodiments of this specification and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of one or more embodiments of this specification.

[0069] The structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0070] It should be noted that, in the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Unless otherwise specified, "multiple" means two or more. The orientation or positional relationship indicated by the terms "center", "longitudinal", "horizontal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0071] In the following description, directions / orientations such as up, down, left, right, front (front end), and rear (rear end) are all based on the vehicle driving position.

[0072] At present, in order to make the shape of car lights more novel, one of the improvement directions is to design the lamps to be flatter. However, the flat shape of car lights also puts higher requirements on the size of the lighting module. That is, the lighting module needs to be designed to be smaller in size while meeting the optical performance requirements.

[0073] In at least some embodiments of this specification, Figure 1 and Figure 2 As an example, a headlight optical system is provided, which includes an optical unit 100 and a light source 200; a light emitting structure 1 is provided at the front end of the optical unit 100, and a light receiving structure 2 is provided at the rear end, wherein the light receiving structure 2 includes a first light incident surface 21 and a reflective 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 reflective surface 22 and then emitted from the light emitting structure 1 to form a target light pattern in front of the headlight optical system. Specifically, the light receiving structure 2 is configured to form an intermediate light image at the focal plane of the light emitting structure 1 after the light incident from the first light incident surface 21 is reflected by the reflective surface 22, and the light emitting structure 1 is configured to image the intermediate light image in front of the headlight optical system.

[0074] In which, the light source 200 and the reflecting surface 22 are configured such that: an incident angle formed by light incident from the main light emitting direction of the light source 200 to the reflecting surface 22 and the reflecting surface 22 is greater than or equal to a first preset angle; and an 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] Among them, 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 may refer to the direction of the optical axis of the light source 200. In practical applications, when the light emitted from the main light-emitting direction of the light source 200 passes through the light-entering surface 21 and enters the main body of the optical unit 100, the propagation direction of the light may or may not be angularly deflected. The incident angle formed with the reflecting surface 22 specifically refers to the incident angle formed by the light emitted from the main light-emitting direction of the light source 200 after entering the main body of the optical unit 100 and the reflecting surface 22.

[0076] When light is emitted from a denser medium to a less dense medium, the refraction angle will be greater than the incident angle; when the incident angle is a certain value, the refraction angle is equal to 90°, and this incident angle is called the critical angle. The critical angle is the minimum incident angle that causes total reflection to occur. The critical angle can be calculated using the following formula:

[0077] Among them, n 2 is the refractive index of the less dense medium, and n 1 is the refractive index of the denser medium.

[0078] In the embodiment of the present specification, at the reflective surface 22, the light is emitted from the inside of the optical unit 100 to the outside of the optical unit 100, and the outside of the optical unit 100 is usually air. The material of the optical unit 100 is a higher density medium, and air is a lower density medium. According to the above formula, when the lower density medium is fixed to 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. Optionally, 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 critical angle of total reflection 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 critical angle of total reflection is about 42 degrees.

[0080] In practice, the corresponding critical angle of total reflection can be calculated according to the refractive index of the material of the optical unit 100, and then a first preset angle whose angle difference with the critical angle of total reflection is less than or equal to 2 degrees can be determined. Therefore, the relative positions of the light source 200 and the reflecting surface 22 and the structure of the reflecting surface 22 can be set so that the incident angle formed by the light from the main light emission direction of the light source 200 incident on the reflecting surface 22 and the reflecting surface 22 is greater than or equal to the first preset angle determined above, so as to achieve that the target light type composed of the light emitted from the optical unit 100 meets the design requirements in terms of the maximum point of the light intensity in the brightness distribution and the efficiency.

[0081] like Figure 2 , showing the corresponding Figure 1 A longitudinal cross-sectional view of a headlight optical system (optical unit 100) is shown. Specifically, Figure 2 The propagation direction of light emitted by the light source 200 in its main light emission direction in the optical unit 100 in the vehicle light optical system of the embodiment of the present specification is schematically shown.

[0082] Among them, the light source 200, the first light incident surface 21, the reflecting surface 22 and the light emitting structure 1 are sequentially arranged along the light path. The light collecting structure 2 is constructed to form an intermediate light image at the focal plane of the light emitting structure 1 after the light incident from the first light incident surface 21 is reflected by the reflecting surface 22, and the light emitting structure 1 is constructed to image the intermediate light image in front of the headlight optical system. Specifically, the first light incident surface 21 is close to the light source 200 and collects light, and the reflecting surface 22 performs secondary light distribution on the light emitted by the light source 200, so that the light converges at the light emitting structure 1 and then emits to form a light pattern. In actual application, the headlight optical system (the optical unit 100) 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 including the headlight optical system.

[0083] In at least some embodiments of the present specification, the light collecting structure 2 can be used to collect the light emitted by the light source 200, and then use the reflective surface 22 to converge the light to the light emitting structure 1. The reflective surface 22 can be a continuous curved surface. Specifically, the reflective surface 22 can be a curved surface convex to the rear end. More specifically, the reflective surface 22 can be constructed so that the light projected thereon converges to a certain extent in both the left-right direction and the up-down direction.

[0084] In actual application, according to the application principle of the headlight optical system, the target light type is obtained by projecting the light spot at the focal plane (the light spot is obtained by the intersection of the focal plane and the light beam) by the optical system (for example, the light output structure 1). The shape of the light spot at the focal plane is an important factor affecting the shape of the target light type; the energy distribution at the focal plane is an important factor affecting the brightness distribution of the target light type. And according to the regulatory requirements for headlight lighting, a light intensity maximum point is required in the brightness distribution of the target light type. In actual application, how to ensure or even improve the light intensity maximum point of the target light type while reducing the size of the headlight optical system is crucial and is a key problem in the manufacture of small-sized headlight optical systems.

[0085] In at least some embodiments of the present specification, an integrated optical unit with a side-light reflective structure is used to reduce the size of the vehicle light optical system. However, due to the characteristics of the reflective structure itself, the energy distribution at the reflective surface 22 is uneven, which in turn causes the energy distribution at the focal plane at the adjacent position to be uneven. This is because the area of ​​the reflective surface 22 closer to the light source 200 (for example, Figures 10 to 18The lower left area of ​​the reflective surface 22 shown in the figure receives stronger energy, but the area closer to the light source 200 is more difficult to meet the conditions of the total reflection theorem. In view of this, technical personnel in the industry generally believe that it is difficult to rely on the reflection effect of the reflective surface 22 material itself to reflect enough light through the light-emitting structure 1 to contribute to the light intensity.

[0086] In the related art, in order to make the maximum point of light intensity and efficiency on the brightness distribution of the target light type meet the requirements, it is usually solved by coating a reflective coating (for example, aluminum, silver, stainless steel, chrome, etc.) on the outside of the reflective surface 22 or adding a conformal reflector. In this case, the light emitting structure 1 can be constructed so that its focus falls on the area with higher light intensity on the reflective surface 22 (for example, Figures 10 to 18 The lower left area of ​​the reflecting surface 22 shown in the figure) is used, and a larger light intensity maximum point in the target light pattern is obtained by means of a reflective coating or a conformal reflector.

[0087] However, although the light intensity maximum point on the brightness distribution of the target light type can meet the requirements by coating a reflective coating on the outside of the reflective surface 22 or adding a conformal reflector, additional steps are added, which on the one hand increases the manufacturing cost, and on the other hand, also increases the process manufacturing error. In particular, the solution of adding a conformal reflector has a high process difficulty, which further increases the process manufacturing error.

[0088] The inventors of the present application have discovered through research that, in actual applications, by adjusting the angle of incidence formed by the light from the main light emitting direction of the light source 200 incident on the reflecting surface 22 and the reflecting surface 22, it is possible to eliminate the need to coat a reflective coating on the outside of the reflecting surface 22 or to add a conformal reflector, thereby ensuring that the maximum light intensity point and efficiency on the brightness distribution of the target light type of the integrated optical unit 100 with a side-light reflecting structure meet the requirements.

[0089] Specifically, the reflection surface 22 may be a total reflection surface, that is, when light is incident on the reflection surface 22 at an angle greater than a critical angle of total reflection, light is substantially only reflected on the reflection surface 22 and substantially no light is refracted.

[0090] The headlight optical unit 100 may be made of a transparent light-guiding material. Optionally, the transparent light-guiding material may include polymethyl methacrylate (PMMA), polycarbonate (PC), polypyromellitimide (PMMI), silica gel or glass, etc., but is not limited thereto.

[0091] In at least some embodiments of the present specification, the angle of the critical angle of total reflection can be determined according to the refractive index of the material of the optical unit 100, so as to adjust the angle of the incident angle formed by the light from the main light emitting direction of the light source 200 incident on the reflective surface 22 and the reflective surface 22. Assuming that the angle of the critical angle of total reflection of the material of the optical unit 100 is A, the light source 200 and the reflective surface 22 can be set to: the incident angle formed by the light from the main light emitting direction of the light source 200 incident on the reflective surface 22 and the reflective surface 22 is greater than or equal to any angle from (A-2) degrees to (A+2) degrees, for example, greater than or equal to (A-2) degrees. In this way, most of the light incident on the reflective surface 22 can meet the conditions of total reflection, so that the light intensity maximum point and efficiency on the brightness distribution of the target light type of the integrated optical unit 100 using the side-input reflective structure meet the requirements without coating the reflective coating on the outside of the reflective surface 22 or adding a conformal reflector.

[0092] Optionally, the headlight optical unit 100 may be made of PC material. The following description will be made by taking the optical unit 100 made of PC as an example.

[0093] like Figures 3 to 5 , respectively show the simulation results when the optical unit 100 is made of PC material, when the angles of incidence formed by the light from the main light emitting direction of the light source 200 incident on the reflecting surface 22 and the reflecting surface 22 are set to 45 degrees, 50 degrees, and 55 degrees, respectively, including a schematic diagram of light propagation and a light intensity contour map of the formed light image.

[0094] like Figures 3 to 5 As shown in the figure, the solid line with arrows represents the light incident from the light source 200 to the reflective surface 22 and the light emitted after being reflected by the reflective surface 22. Among them, (a) is a schematic diagram of light propagation in an optical system including a total reflective surface without a reflective coating in the embodiment of this specification; (b) is a light intensity contour map corresponding to (a); (c) is a schematic diagram of light propagation in the case where a reflective coating is applied to the outer side of the reflective surface in the related art; (d) is a light intensity contour map corresponding to (c).

[0095] exist Figure 3In the figure, when the optical unit 100 is made of PC material, as in at least some embodiments of the present specification, when the reflective coating is not coated on the outer side of the reflective surface 22 or a conformal reflector is not provided, a schematic diagram of light propagation when the angle of incidence formed by the light from the main light emitting direction of the light source 200 incident on the reflective surface 22 and the reflective surface 22 is 45 degrees (a) and a light intensity contour diagram of the light image formed (b); and, when the reflective coating is coated on the outer side of the reflective surface 22 as in the related art, a schematic diagram of light propagation when the angle of incidence formed by the light from the main light emitting direction of the light source 200 incident on the reflective surface 22 and the reflective surface 22 is 45 degrees (c) and a light intensity contour diagram of the light image formed (d).

[0096] Specifically, in addition to the condition of whether a reflective coating is provided on the reflective surface 22, Figure 3 In (a) and (b), Figure 3 The other experimental conditions in (c) and (d) 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 other experimental conditions are set to be kept the same. In addition, in the simulation experiment, the reflectivity of the reflective coating is set to 0.8.

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

[0098] according to Figure 3 It can be seen from the experimental results that in actual applications, if the solution of the embodiment of this specification is adopted, when the optical unit 100 is made of PC material and the incident angle formed by the light of the main light emitting direction of the light source 200 incident on the reflecting surface 22 and the reflecting surface 22 is 45 degrees, compared with the solution of using reflective coating in the related art, a comparable or even higher light efficiency and a larger maximum light intensity value are obtained, and an unexpected excellent effect is achieved.

[0099] exist Figure 4In the figure, when the optical unit 100 is made of PC material, as in at least some embodiments of the present specification, when the reflective coating is not coated on the outer side of the reflective surface 22 or a conformal reflector is not provided, a schematic diagram of light propagation when the angle of incidence formed by the light from the main light emitting direction of the light source 200 incident on the reflective surface 22 and the reflective surface 22 is 50 degrees (a) and a light intensity contour diagram of the light image formed (b); and, when the reflective coating is coated on the outer side of the reflective surface 22 as in the related art, a schematic diagram of light propagation when the angle of incidence formed by the light from the main light emitting direction of the light source 200 incident on the reflective surface 22 and the reflective surface 22 is 50 degrees (c) and a light intensity contour diagram of the light image formed (d).

[0100] Specifically, in addition to the condition of whether a reflective coating is provided on the reflective surface 22, Figure 4 In (a) and (b), Figure 4 The other experimental conditions in (c) and (d) 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 other experimental conditions are set to be kept the same. In addition, in the simulation experiment, the reflectivity of the reflective coating is set to 0.8.

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

[0102] according to Figure 4 It can be seen from the experimental results that in actual applications, if the solution of the embodiment of this specification is adopted, when the optical unit 100 is made of PC material and the incident angle formed by the light of the main light emitting direction of the light source 200 incident on the reflecting surface 22 and the reflecting surface 22 is 50 degrees, compared with the solution of using reflective coating in the related art, significantly better effects are obtained, including higher light efficiency and larger maximum light intensity value, and unexpected excellent effects are achieved.

[0103] exist Figure 5In the figure, when the optical unit 100 is made of PC material, as in at least some embodiments of the present specification, when the reflective coating is not coated on the outer side of the reflective surface 22 or a conformal reflector is not added, a schematic diagram of light propagation when the angle of incidence formed by the light from the main light emitting direction of the light source 200 incident on the reflective surface 22 and the reflective surface 22 is 55 degrees (a) and a light intensity contour diagram of the light image formed (b); and, when the reflective coating is coated on the outer side of the reflective surface 22 as in the related art, a schematic diagram of light propagation when the angle of incidence formed by the light from the main light emitting direction of the light source 200 incident on the reflective surface 22 and the reflective surface 22 is 55 degrees (c) and a light intensity contour diagram of the light image formed (d).

[0104] Specifically, in addition to the condition of whether a reflective coating is provided on the reflective surface 22, Figure 5 In (a) and (b), Figure 5 The other experimental conditions in (c) and (d) 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 other experimental conditions are set to be kept the same. In addition, in the simulation experiment, the reflectivity of the reflective coating is set to 0.8.

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

[0106] according to Figure 5 It can be seen from the experimental results that in actual applications, if the solution of the embodiment of this specification is adopted, when the optical unit 100 is made of PC material and the incident angle formed by the light of the main light emitting direction of the light source 200 incident on the reflecting surface 22 and the reflecting surface 22 is 55 degrees, compared with the solution of using reflective coating in the related art, significantly better effects are obtained, including higher light efficiency and larger maximum light intensity value, and unexpected excellent effects are achieved.

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

[0108] Figure 6 , when the optical unit 100 is made of PC or PMMA, the simulation experimental results of the maximum light intensity value of the light image when the incident angles formed by the light from the main light emitting direction of the light source 200 incident on the reflective surface 22 and the reflective surface 22 are different angles are shown. Figure 7 It shows the simulation experimental results of the light efficiency when the incident angles formed by the light from the main light emitting direction of the light source 200 incident on the reflective surface 22 and the reflective surface 22 are different when the optical unit 100 is made of PC or PMMA.

[0109] Combination Figure 6 and Figure 7 After analysis, it can be known that in an optional embodiment, if the optical unit 100 is made of PC material, the light source 200 and the reflective surface 22 can be set so that the incident angle formed by the light from the main light emitting direction of the light source 200 incident on the reflective surface 22 and the reflective surface 22 is greater than or equal to 37 degrees. Similarly, in an optional embodiment, if the optical unit 100 is made of PMMA material, the light source 200 and the reflective surface 22 can be set so that the incident angle formed by the light from the main light emitting direction of the light source 200 incident on the reflective surface 22 and the reflective surface 22 is greater than or equal to 40 degrees. In this case, compared with the solution of using reflective coating in the related art, while reducing the process steps (for example, the coating process), being more environmentally friendly and reducing the production cost, it also obtains comparable or even higher light efficiency and a larger maximum light intensity value, and achieves unexpected excellent results.

[0110] Therefore, in an optional embodiment, the light source 200 and the reflective surface 22 may be configured such that the incident angle formed by the light from the main light emitting direction of the light source 200 incident on the reflective surface 22 and the reflective surface 22 is greater than or equal to a first angle, and the first angle may be 37 degrees to 40 degrees. In this case, compared with the solution of using a reflective coating in the related art, while reducing the process steps (for example, the coating process), being more environmentally friendly and reducing the production cost, a comparable or even higher light efficiency and a larger maximum light intensity value are obtained, achieving an unexpected excellent effect.

[0111] In an optional embodiment, if the optical unit is made of PC material, the light source 200 and the reflective surface 22 can be configured such that the incident angle formed by the light from the main light emitting direction of the light source 200 incident on the reflective surface 22 and the reflective surface 22 is greater than or equal to 44 degrees. Similarly, in an optional embodiment, if the optical unit is made of PMMA material, if the light source 200 and the reflective surface 22 can be configured such that the incident angle formed by the light from the main light emitting direction of the light source 200 incident on the reflective surface 22 and the reflective surface 22 is greater than or equal to 46 degrees. In this case, compared with the solution of using reflective coating in the related art, while reducing the process steps (for example, the coating process), being more environmentally friendly and reducing the production cost, significantly higher light efficiency and a larger maximum light intensity value are obtained, overcoming technical prejudice and achieving unexpected excellent results.

[0112] Therefore, in an optional embodiment, the light source 200 and the reflective surface 22 can be configured such that the incident angle formed by the light from the main light emitting direction of the light source 200 incident on the reflective surface 22 and the reflective surface 22 is greater than or equal to the 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, while reducing the process steps (for example, the coating process), being more environmentally friendly and reducing the production cost, significantly higher light efficiency and a larger maximum light intensity value are obtained, overcoming technical prejudice and achieving unexpected excellent results.

[0113] In an optional embodiment, if the optical unit is made of PC material, the light source 200 and the reflective surface 22 can be configured such that the incident angle formed by the light from the main light emitting direction of the light source 200 incident on the reflective surface 22 and the reflective surface 22 is greater than or equal to 50 degrees. Similarly, in an optional embodiment, if the optical unit is made of PMMA material, if the light source 200 and the reflective surface 22 can be configured such that the incident angle formed by the light from the main light emitting direction of the light source 200 incident on the reflective surface 22 and the reflective surface 22 is greater than or equal to 50 degrees. In this case, compared with the solution of using reflective coating in the related art, not only the process steps (for example, the coating process) are reduced, the production cost is more environmentally friendly and the significantly higher light efficiency and the larger maximum light intensity value are stably obtained, the technical prejudice is overcome, and unexpected excellent results are achieved.

[0114] Therefore, in an optional embodiment, the light source 200 and the reflective surface 22 can be configured such that the incident angle formed by the light from the main light emitting direction of the light source 200 incident on the reflective surface 22 and the reflective surface 22 is 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 coating process) are reduced, it is more environmentally friendly and reduces the production cost, but also significantly higher light efficiency and a larger maximum light intensity value are stably obtained, overcoming technical prejudice and achieving unexpected excellent results.

[0115] The above analysis and experimental data show that, compared with the solution using a reflective coating in the related art, the embodiment of the present specification provides a method of controlling the main light emission direction of the light source 200 so that the incident angle formed by the light incident on the reflective surface 22 and the reflective 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). This can reduce the process manufacturing steps of the optical system, reduce the risk of introducing manufacturing errors, and reduce costs, while obtaining a lighting effect that is not inferior or even better and more stable, for example, having a larger maximum brightness value and higher light efficiency, thereby overcoming technical prejudice and achieving unexpected results.

[0116] In at least some embodiments of the present specification, the first light incident surface 21 may be a smooth surface, for example, a flat surface, a convex curved surface or a concave curved surface. In practical applications, the first light incident surface 21 may also be set as an applicable patterned surface.

[0117] In practical applications, the distance between the light source 200 and the light receiving structure 2 can be set as small as possible to improve light efficiency. Specifically, the distance between the light source 200 and the first light incident surface 21 can be set as small as possible. For example, the distance between the light source 200 and the first light incident surface 21 can be set to no more than 5 mm.

[0118] In at least some embodiments of the present specification, the light source 200 may be a LED light source or a laser light source. In addition, the drawings only schematically show the approximate position of the light source 200. In actual application, the type, quantity, position arrangement, etc. of the light source 200 may be adjusted according to design requirements.

[0119] Furthermore, the light source 200 may be disposed on a printed circuit board 300, and the main light emission direction of the light source 200 is substantially consistent with the normal direction of the printed circuit board 300. Thus, it is convenient to adjust the incident angle formed by the light from the main light emission direction of the light source 200 incident on the reflective surface 22 and the reflective surface 22 by adjusting the position and angle of the printed circuit board 300.

[0120] In practical applications, the relative position of the light source 200 and the optical unit 100 can be optionally set to: the optical axis direction of the light source 200 is substantially consistent with the normal direction of the first light incident surface 21. If the first light incident surface 21 is a plane, the normal direction of the first light incident surface 21 may refer to the 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 may refer to the direction perpendicular to the tangent plane of the curved surface. This is conducive to maintaining the gap between the light source 200 and the light collecting structure 2, and can effectively avoid problems such as local proximity due to factors such as assembly errors, which may lead to bumps or ablation.

[0121] The optical unit 100 in the vehicle light optical system provided in the embodiment of this specification can provide a light pattern without a cut-off line, for example Figure 1 . Figure 1 FIG. 1 shows a stereogram of a vehicle light optical system (including an optical unit and a light source) provided in an embodiment of the present specification, wherein the optical unit is not provided with a cut-off line structure. Figure 1 The vehicle light optical system shown in can be applied to a high beam.

[0122] In at least some embodiments of the present specification, a cut-off line structure may be provided in the optical unit 100 to form a light pattern with a cut-off line, for example Figure 8 , Fig. 9 wait. Figure 8 A stereoscopic view of an optical unit with a cut-off line structure provided in an embodiment of the present specification is shown, wherein a cut-off line structure is provided, specifically, the shape of a first boundary line 201 between the reflecting surface 22 and the cutting surface 23 can be adapted to the shape of the light type cut-off line. Fig. 9 1 shows a stereogram of another optical unit with a cut-off line structure provided by an embodiment of the present specification, wherein a cut-off 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 type cut-off line. In practical applications, such as Figure 8 or Fig. 9 The optical unit 100 shown in FIG. 1 may be applied to a low beam lamp, a front fog lamp, a corner lamp, a turn assist lamp, and the like.

[0123] The following mainly combines Figures 10 to 18 The cut-off line structure is described. In at least some embodiments of the present specification, the cut-off line structure (including the first cut-off line structure and the second cut-off line structure) may specifically refer to a structure for forming a light type cut-off line in a light type.

[0124] In an optional embodiment, the light collecting structure 2 may further include a first cutoff line structure located on the reflective surface 22, and the first cutoff line structure is configured to destroy the local reflective effect of the reflective surface 22. Specifically, the first cutoff line structure may be configured to prevent part of the light directed toward the reflective surface 22 from being reflected.

[0125] Among them, the light emitting structure 1 (see Figure 8 and Fig. 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 practical applications, when the light output structure 1 has multiple focal points, at least one focal point of the light output structure 1 can be located near the first cut-off line structure, thereby forming a clear cut-off line in the light pattern.

[0126] like Fig.10 , the oval dotted frame marks the area where the first cutoff line structure is formed, that is, the area where the reflection effect of the reflection surface 22 is destroyed. Fig.10 In the figure, the first light incident surface 21 is also shown. Fig.10 The light rays shown by the dotted lines in FIG. 1 may represent the light rays cut off by the first cut-off line structure.

[0127] As an alternative example, see Fig.11 and Fig.12 The light collecting structure 2 may further include a cutting surface 23 formed by cutting the reflecting surface 22, and the shape of the first boundary line 201 between the reflecting surface 22 and the cutting surface 23 is adapted to the shape of the light type cut-off line. Figure 8 and Fig. 9 ) may be located at the first boundary line 201, for example, may be located on or near the first boundary line 201.

[0128] Alternatively, if Fig.11 As shown in , the cutting surface 23 can extend along a straight line or a smooth curve in the left-right direction, and the cutting surface 23 can be a plane or a smooth curved surface, so that the projection of the first intersection line 201 of the cutting surface 23 and the reflecting surface 22 (that is, 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 headlight optical system is applied to the front fog lamp or the steering auxiliary lighting lamp (corner lamp), the cutoff line in the light pattern can be a horizontal line.

[0129] Alternatively, if Fig.12As shown in , the cutting surface 23 can extend in the left-right direction along a line with an inflection point, and the cutting surface 23 can be a surface including a step, so that the projection of the first intersection line 201 of the cutting surface 23 and the reflecting surface 22 (i.e., the projection of the intersection line on a surface perpendicular to the main optical axis of the light emitting structure 1) can be a line with an inflection point. In actual application, when the headlight optical system is applied to a low beam, the cutoff line in the light pattern can be a line with an inflection point.

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

[0131] As another alternative example, see Fig.13 The reflective surface 22 of the light receiving structure 2 may include 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 cutoff line. Figure 8 and Fig. 9 ) may be located at the dividing line 202, for example, may be located on or near the dividing line 202.

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

[0133] Among them, the high-absorption material coated on the second area 222 may include black paint, and the black paint may contain, for example, pigments (for example, carbon black, iron oxide, titanium dioxide, etc.), solvents (for example, dryers, diluents, preservatives, etc.), resins (for example, dryers, diluents, preservatives, etc.), and may also include additives (for example, dryers, diluents, preservatives, etc.). Examples of black paint are not limited to these, and examples of high-absorption materials are not limited to black paint.

[0134] As another alternative example, refer to Fig.14 The optical unit 100 may further include a first splicing portion 3 located at the rear end of the light receiving structure 2, the first splicing portion 3 being made of a non-transparent material, and the shape of the splicing interface between the first splicing portion 3 and the light receiving structure 2 and the second boundary line 203 of the reflective surface 22 is adapted to the shape of the light type cut-off line. Figure 8 and Fig. 9 ) may be located at the second boundary line 203, for example, may be located on or near the second boundary line 203.

[0135] Among them, optionally, the second boundary line 203 can be a smooth straight line or curve extending in the left-right direction, and its projection (that is, the projection of the second boundary line 203 on the plane perpendicular to the main optical axis of the light output 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, and its projection (that is, the projection of the second boundary line 203 on the plane perpendicular to the main optical axis of the light output structure 1) can be a line with an inflection point.

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

[0137] In practical applications, the first splicing portion 3 can be formed in the process of integrally forming the optical unit 100; or optionally, the first splicing portion 3 can be formed through a subsequent process after the main body of the optical unit 100 is integrally formed.

[0138] In an optional embodiment, the optical unit 100 may further include a second cut-off line structure located downstream of the reflective surface 22 on the optical path, and the second cut-off line structure may be configured to block light from the reflective surface 22 to the light exit structure 1 (see Figure 8 and Fig. 9 ) part of the light.

[0139] Among them, the light emitting structure 1 (see Figure 8 and Fig. 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 practical applications, when the light output structure 1 has multiple focal points, at least one focal point of the light output structure 1 can be located near the second cut-off line structure, thereby forming a clear cut-off line in the light pattern.

[0140] In practical applications, in order to reduce the length of the optical unit 100, the second cut-off line structure may be disposed at a position adjacent to the light collecting structure 2. Fig.15 The oval dotted frame identifies the area where the second cut-off line structure is formed, which is preferably a position in the optical unit 100 that is downstream of the light collecting structure 2 (downstream of the reflective surface 22 on the optical path) and adjacent to the light collecting structure 2. Fig.15 The light rays shown by the dotted lines in FIG. 1 may represent the light rays cut off by the second cut-off line structure.

[0141] As an alternative example, see Fig.16 and Fig.17 , the second cut-off line structure may include a groove 4 located in the lower side area of ​​the optical unit 100; the groove 4 may 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 the third boundary line 401 between the first side 41 and the second side 42 is adapted to the shape of the light type cut-off line. Figure 8 and Fig. 9 ) may be located at the third boundary line 401, for example, on or near the third boundary line 401.

[0142] As another alternative example, see Fig.18 The optical unit 100 may further include a second splicing portion 5 located in the groove 4, wherein the second splicing portion 5 is made of a non-transparent material. The non-transparent material constituting the second splicing portion 5 may include a black PC (polycarbonate) material, a black PMMA (polymethyl methacrylate) material, etc., but is not limited thereto.

[0143] In practical applications, the second splicing portion 5 can be formed in the process of integrally forming the optical unit 100; or optionally, the second splicing portion 5 can be formed through a subsequent process after the main body of the optical unit 100 is integrally formed.

[0144] As another optional example, at least one of the first side surface 41 and the second side surface 42 may be coated with a highly absorbing material or a highly reflective material. The highly reflective material may include aluminum, silver, stainless steel, chromium, etc., but is not limited thereto. The highly absorbing material may include black paint, which may contain, for example, pigments (e.g., carbon black, iron oxide, titanium dioxide, etc.), solvents (e.g., dryers, diluents, preservatives, etc.), resins (e.g., dryers, diluents, preservatives, etc.), and may also include additives (e.g., dryers, diluents, preservatives, etc.). The example of black paint is not limited thereto, and the example of highly absorbing material is not limited to black paint. In actual application, the first side surface 41 and the second side surface 42 may not be coated with any material, and the effect of blocking the light path may be achieved only by adjusting the angle; and the highly absorbing material or the highly reflective material may further enhance the light blocking effect.

[0145] Optionally, the first side surface 41 and the second side surface 42 may extend in a straight line or a smooth curve in the left-right direction, and the first side surface 41 and the second side surface 42 may be planes or smooth curved surfaces, whereby the projection of the third boundary line 401 between 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 main optical axis of the light-emitting structure 1) may be a straight line. In practical applications, when the headlight optical system is applied to a front fog lamp or a steering auxiliary lighting lamp (corner lamp), the cutoff line in the light pattern may be a horizontal line.

[0146] Alternatively, if Fig.16 As shown, in the perspective portion shown in dotted lines, it can be seen that the first side surface 41 or the second side surface 42 can extend along a line with an inflection point in the left-right direction, and the first side surface 41 or the second side surface 42 can be a surface containing a step, so that the projection of the third intersection line 401 of the first side surface 41 and the second side surface 42 (that is, the projection of the intersection line on a surface perpendicular to the main optical axis of the light output structure 1) can be a line with an inflection point. In actual application, when the headlight optical system is applied to a low beam, the cutoff line in the light pattern can be a line with an inflection point.

[0147] Based on one or more embodiments of the present specification, the headlight optical system obtained by arranging and combining multiple optical units 100 can form a high beam light type or a low beam light type in the traffic space in front of a vehicle equipped with a headlight module including the corresponding headlight optical system. Optionally, the headlight optical system of the embodiment of the present specification can also be configured as a front fog lamp, a corner lamp or a steering auxiliary lighting lamp.

[0148] In at least some embodiments of this specification, a vehicle light optical system is provided, such as Figure 1 , Figure 2 , Figure 8 and Fig. 9 As shown in the figure, 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 constructed 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 constructed to image the intermediate light image in front of the headlight optical system.

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

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

[0151] Wherein, optionally, in order to achieve a target light type effect, the focal points of the multiple optical lens surfaces 101 may be realized 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 type cutoff line, the focal point of at least one of the multiple optical lens surfaces 101 may be located near the cutoff line structure.

[0152] In practical applications, the step pattern surface may include step Fresnel checkered pattern, step Fresnel vertical stripes, step Fresnel horizontal stripes, step Fresnel diamond pattern, step Fresnel polygonal pattern and step Fresnel special-shaped stripes, etc. The types of step pattern surfaces are not limited to the examples listed here.

[0153] As an example, Fig.19 , showing a stepped Fresnel checkerboard pattern. Fig.19 In the embodiment, a plurality of optical lens surfaces 101 are arranged in a grid-like manner in a staggered chessboard form, and adjacent optical lens surfaces 101 are connected by non-optical step surfaces 102. Fig. 20 , showing the vertical Fresnel fringes. Fig. 20 In the embodiment, a plurality of optical lens surfaces 101 are in the shape of vertical strips and are arranged in a staggered side-by-side manner, and adjacent optical lens surfaces 101 are connected by non-optical step surfaces 102 .

[0154] In addition, in an optional implementation, the contour of the first light emitting surface 11 can be arbitrarily set according to design requirements, for example, it can be square, circular or any other shape.

[0155] In addition, in an optional implementation, a microstructure pattern may be further provided on the first light emitting surface 11 to adjust the cut-off line gradient.

[0156] For example, despite Figure 1 , Figure 8 and Fig. 9 In the figure, the first light emitting surface 11 is taken as a stepped Fresnel vertical stripe as an example, but those skilled in the art can understand that a continuous curved surface or other types of stepped patterned surfaces are also feasible.

[0157] In at least some embodiments of this specification, a vehicle light optical system is provided, such as Figure 21 to Figure 26 As shown in the figure, 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 which are sequentially arranged along the light path; the light collecting structure 2 is constructed to form an intermediate light image at a 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 constructed to image the intermediate light image in front of the headlight optical system.

[0158] Figure 21 to Figure 24 FIG. 2 shows a three-dimensional schematic diagram of another vehicle light optical system provided in an embodiment of the present specification. Figure 21 to Figure 24 As shown in FIG. 1 , in the process of forming the second light emitting surface 12, the second light incident surface 13 and the third light emitting surface 14, the optical element 100 can be formed into two independent parts (eg Figure 21 to Figure 23 ), or, alternatively, they may be integrally formed and have a connection structure between the second light emitting surface 12 and the second light incident surface 13 (such as Fig.24 ).

[0159] like Fig.21 ,and Figure 1 Compared with the optical system of the vehicle light shown, the main difference lies in the light output structure 1. Figure 1 The light emitting structure 1 of the optical unit 100 in the vehicle light optical system specifically comprises a first light emitting surface 11, and Fig.21 The light emitting structure 1 of the optical unit 100 in the headlight optical system specifically includes a second light emitting surface 12, a second light incident surface 13 and a third light emitting surface 14; therefore, for the description of other structures except the light emitting structure 1, reference can be made to the above description of Figure 1 The relevant description of the example is not repeated here. It should be explained that compared with Fig.21 , Figure 1 The fine structures such as chamfers between the reflective surface 22 and the side surfaces of the optical unit 100 are provided to meet the actual production needs and have no technical impact on the implementation of the technical solutions of the embodiments of this specification and need not be paid attention to. Similarly, Fig. 22 and Figure 8 Have a corresponding relationship, Fig.23 and Fig. 9 There is a corresponding relationship, and the relevant description can refer to the above.

[0160] like Fig.25 , showing the corresponding Fig. 22 or Fig.23 A longitudinal cross-sectional view of an optical unit in a headlight optical system. Fig.26 , showing the corresponding Fig.21 or Fig. 22 or Fig.23 A cross-sectional view of an optical unit in a headlight optical system. And specifically, Fig.25 and Fig.26 The propagation direction of light in the optical unit is schematically shown in FIG.

[0161] In at least some embodiments, the second light emitting surface 12 may be configured to control the lateral distribution of light.

[0162] In at least some embodiments, the second light emitting surface 12 may 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 emitting surface 12 may converge light in the left-right direction; alternatively, at least some of the one or more optical surfaces included in the second light emitting surface 12 may diffuse light in the left-right direction.

[0163] like Fig.26 , showing that the cross section of the second light emitting surface 12 can be a curved surface convex toward the front, so that the light is gathered in the left and right directions.

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

[0165] In at least some embodiments, at least one of the second light emitting surface 12, the second light incident surface 13, and the third light emitting surface 14 may 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 at least one of the second light emitting surface 12, the second light incident surface 13, and the third light emitting surface 14 may allow light to converge to a certain extent in the up-down direction.

[0166] In practical applications, the second light emitting surface 12 may be configured to determine the focus of the light in the left-right direction, and more specifically, the focus of at least part of the optical surface included in the second light emitting surface 12 in the left-right direction may be at the common focal plane. The second light emitting surface 12, the second light incident surface 13, and the third light emitting surface 14 may be configured to jointly determine the focus of the light in the up-down direction, and more specifically, the focus of at least part of the optical surface in the second light emitting surface 12, the second light incident surface 13, and the third light emitting surface 14 in the up-down direction may be at the common focal plane.

[0167] In at least some embodiments of this specification, a vehicle light optical system is provided, such as Figure 21 to Figure 26 Based on the optical unit shown in Figures 10 to 18 The illustrated area includes a cutoff line structure.

[0168] Alternatively, if Figures 10 to 14 As shown, the light collecting structure 2 may further include a first cut-off line structure located on the reflective surface 22, wherein the first cut-off line structure is configured to destroy the local reflective effect of the reflective surface 22; the second light emitting surface 12 (see Figure 21 to Figure 26) is located at the first cut-off line structure; the second light emitting surface 12, the second light incident surface 13 and the third light emitting surface 14 (see Figure 21 to Figure 26 ) has a focus in the up and down directions located at the first cut-off line structure.

[0169] Alternatively, if Figures 15 to 18 As shown, the optical unit 100 further includes a second cut-off line structure located downstream of the reflective surface 22 on the optical path, wherein the second cut-off line structure is configured to block part of the light emitted from the reflective surface 22 to the light emitting structure 1; the second light emitting surface 12 (see Figure 21 to Figure 26 ) in the left and right directions is located at the second cut-off line structure; the second light emitting surface 12, the second light incident surface 13 and the third light emitting surface 14 (see Figure 21 to Figure 26 ) has a focus in the up and down directions located at the second cutoff line structure.

[0170] In this manual, Figure 21 to Figure 26 In the illustrated embodiment, the first light incident surface 21, the reflecting surface 22, the second light emitting surface 12, the second light incident surface 13 and the third light emitting surface 14 can be arranged in sequence along the light path. The first light incident surface 21 is close to the light source 200 and collects light, and the reflecting surface 22 performs secondary light distribution and total reflection on the light emitted by the light source 200, so that the light is successively transmitted through the second light emitting surface 12, the second light incident surface 13 and the third light emitting surface 14 to adjust the propagation direction and then emit to form a light pattern. In actual application, 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 including the optical system components.

[0171] The configuration of the light collecting structure 2 and the light source 200 may be consistent with the above-mentioned embodiment, see Figures 7 to 16 And related descriptions will not be repeated here.

[0172] In at least some embodiments of the present specification, the provided headlight optical system may include a low beam three-zone structure for forming a low beam three-zone light pattern in a target light pattern of the headlight optical system so that the headlight optical system meets the three-zone requirement of the regulations.

[0173] Specifically, the low beam three-zone structure may be provided on the upper surface and / or the lower surface of the optical unit 100. Optionally, the low beam three-zone structure may include a first low beam three-zone structure, which may be configured as an outwardly convex structure or an inwardly concave structure on the upper surface of the optical unit 100. Optionally, the low beam three-zone structure may include a second low beam three-zone structure, which may 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 implementation, a coating and / or pattern may be added to the upper side and / or lower side of the optical unit 100. In this way, the system stray light can be optimized.

[0175] In addition, in an optional implementation, the upper side and the lower side of the headlight optical system provided in the embodiments of this specification can be constructed to be hidden in the decorative frame, or protrude from the decorative frame according to actual styling needs.

[0176] It should be noted that the drawings do not show all embodiments of the present application, and those skilled in the art can obtain more embodiments of the present application based on the combination of features described in this specification. Figure 1 There is no chamfer between the reflective surface and the light incident surface of the optical unit 100 shown in the figure, but it is understandable that in actual application, due to manufacturing process and other reasons, a chamfer may exist between the reflective surface and the light incident surface. The examples given here are not exhaustive.

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

[0178] Optionally, the shape of the longitudinal section of the optical unit 100 perpendicular to the front-to-back direction may be any shape, for example, a rectangle, a regular trapezoid (isosceles or unequal), an inverted trapezoid (isosceles or unequal), a rhombus, other shapes, etc. In practical applications, the upper side and the lower side of the optical unit 100 may be of equal width or unequal width.

[0179] Optionally, the sizes of multiple longitudinal sections of the optical unit 100 perpendicular to the front-to-back direction may be the same or different. For example, the area of ​​the longitudinal section of the light-transmitting main body of the optical unit 100 near the light-emitting side may be equal to or smaller than the area of ​​the longitudinal section near the light-entering side. In practical applications, the opening size of the front light-emitting side of the optical unit 100 may be smaller than or equal to the size of the light-entering port at the rear end of the optical unit 100. Setting the size of the light-emitting side smaller than the size of the light-entering side is conducive to reducing the overall size of the optical unit 100.

[0180] Based on the solution of the embodiment of this specification, the optical unit 100 is an integrally formed component, which replaces the headlight optical assembly of the prior art, which includes at least a light collecting structure and an outer lens, and has a lower material cost, can reduce assembly links, reduce assembly difficulty, and increase production speed; at the same time, fewer parts have fewer component tolerances and assembly tolerances, which can improve the manufacturing and assembly accuracy of the headlight module while reducing manufacturing costs, and improve the quality and performance stability of the product. Compared with the traditional solution, at least one focus of the light output structure 1 in the optical unit 100 provided in the embodiment of this specification is located at or close to the reflective surface 22, so that the length of the headlight optical system composed of the optical unit 100 in the front and rear directions is greatly reduced. In addition, the number of refractive surfaces through which the light passes is reduced, and the light is transmitted inside the medium, and the light utilization efficiency is higher. Therefore, the structure is simple and efficient, and the light channel and the light output surface can be set smaller. Therefore, based on the headlight optical system provided in the embodiment of this specification, the smaller component size can bring a higher degree of freedom in the design of the entire lamp shape, and the whole lamp structure design difficulty is reduced while being beautiful. The height of common headlight optical components on the market is usually more than 25 mm, while the height and width of the light-emitting structure 1 of the optical unit 100 provided in the embodiment of this specification can be less than 5 mm, which is much smaller than the size of conventional solutions on the market. The smaller light-emitting surface makes the headlight optical system occupy less space and more beautiful, which can reduce the difficulty of the whole lamp structure design and bring higher degree of freedom in the whole lamp shape design.

[0181] Furthermore, when constructing an optical system, the light source 200 is arranged to be adjacent to the first light incident surface 21, and the light source 200 and the reflecting surface 22 are arranged so that: the incident angle formed by the light from the main light emission 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 reflection of the material of the optical unit 100 is less than or equal to 2 degrees, thereby, it is possible to achieve a light type maximum brightness value and light efficiency that meet the requirements without coating a reflective coating on the reflecting surface 22.

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

[0183] Specifically, when the headlight optical system includes a plurality of optical units 100, the plurality of optical units 100 may be formed integrally, or the plurality of optical units 100 may be formed separately and then spliced. In practical applications, the number of optical units 100 actually included in the headlight optical system may be determined according to the requirements of luminous flux and optical performance.

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

[0185] For example, Fig. 27 An example of an integrated headlight optical system including five optical units 100 is shown in FIG. Fig.28 The figure shows a vehicle light optical system composed of a first part including two optical units 100 formed in one piece and a second part including three optical units 100 formed in one piece.

[0186] It is understandable that the combination of the plurality of optical units 100 can be configured according to actual needs and need not be limited to the aforementioned Fig. 27 and Fig.28 The grouping situation is shown as an example in FIG. And, Fig.28 The relative positions of the different groups shown in FIG. 1 are only exemplary. In practical applications, multiple optical units 100 can be combined into Fig. 27 and Fig.28 The horizontal type shown can also be combined into various shapes such as vertical, C-shaped, L-shaped, etc. to meet the needs of the entire lamp shape.

[0187] Further, in the case where the vehicle light optical system includes a plurality of optical units 100, the vehicle light optical system may include a combination of light sources 200 corresponding to the plurality of optical units 100. Specifically, the plurality of light sources 200 may be arranged in a manner adapted to the arrangement and combination of the plurality of optical units 100, and satisfy the requirement that the incident angle of the light incident on the reflective surface 22 of each optical unit 100 is greater than a certain angle value, so that most of the incident light is totally reflected and then emitted from the light emitting structure 1 to form a light pattern.

[0188] In at least some embodiments of the present specification, a vehicle light module is also provided, and the vehicle light module includes a vehicle light optical system.

[0189] Optionally, the headlight optical system includes an optical unit 100 and a light source 200; a light emitting structure 1 is provided at the front end of the optical unit 100, and a light receiving structure 2 is provided at the rear end, the light receiving structure 2 includes a first light incident surface 21 and a reflecting surface 22; the light source 200 is arranged to be 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 headlight optical system; wherein the light source 200 and the reflecting surface 22 are arranged such that an incident angle formed by the light 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 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 further provided, comprising a vehicle light module, wherein the vehicle light module comprises the vehicle light optical system described in the aforementioned embodiments.

[0191] In actual application, the vehicle can specifically be a motor vehicle, including but not limited to a car, a motorcycle, an electric vehicle, a tram or trolley bus, an agricultural transport vehicle, etc. This application does not specifically limit the type of vehicle.

[0192] One or more embodiments of the present specification provide a headlight optical system, a headlight module and a vehicle. Specifically, a headlight optical system is constructed, including 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 receiving structure 2, and the light receiving structure 2 includes a first light incident surface 21 and a reflective 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 reflective surface 22 and then emitted from the light emitting structure 1 to form a target light pattern in front of the headlight optical system; wherein the light source 200 and the reflective surface 22 are arranged such that the incident angle formed by the light incident from the main light emitting direction of the light source 200 to the reflective surface 22 and the reflective 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. A headlight module and a vehicle based on the headlight optical system are constructed.

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

[0194] First, the provided headlight optical system has a smaller light-emitting surface, and the height and width of a single optical unit can be less than 5mm. The number of units required for complete functions depends on the power of the light source used and the requirements for the light spot performance. The smaller light-emitting surface makes the headlight optical system occupy less space and more beautiful, which can reduce the difficulty of the overall lamp structure design and bring higher freedom in the overall lamp shape design. By reducing the number of parts in the current common headlight module solutions (for example, an integrated thick-walled lens realizes the lighting function of the headlight module), it not only has lower material costs, but also can reduce assembly links, reduce assembly difficulty, and increase production speed. At the same time, fewer parts mean fewer component tolerances and assembly tolerances, which can improve the quality and performance stability of the headlight module and headlights.

[0195] Second, by reasonably setting the position of the light source relative to the reflective surface, the incident angle formed by the light from the main light emission direction of the light source incident on the reflective surface and the reflective 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. As a result, it is possible to achieve a maximum brightness value and light efficiency of the light type that meet the conditions without coating a reflective coating on the reflective surface, and even achieve a better effect than using a reflective coating, thereby overcoming technical prejudice and obtaining unexpected technical effects.

[0196] The above is a description of a specific embodiment of the present specification. Other embodiments are within the scope of the appended claims. The above description is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

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

2. The vehicle light optical system according to claim 1, characterized in that: The reflecting surface (22) is a total reflecting surface.

3. The vehicle light optical system according to claim 2, characterized in that: The light source (200) and the reflective surface (22) are arranged such that an incident angle formed by light rays incident on the reflective surface (22) from a main light emission direction of the light source (200) and the reflective surface (22) is greater than or equal to a first angle; the first angle is between 37 degrees and 40 degrees.

4. The vehicle light optical system according to claim 3, characterized in that: The light source (200) and the reflective surface (22) are arranged such that an incident angle formed by light rays incident on the reflective surface (22) from a main light emission direction of the light source (200) and the reflective surface (22) is greater than or equal to a second angle; and the second angle is between 44 degrees and 46 degrees.

5. The vehicle light optical system according to claim 4, characterized in that: The light source (200) and the reflective surface (22) are arranged such that an incident angle formed by light rays incident on the reflective surface (22) from the main light emission direction of the light source (200) and the reflective surface (22) is greater than or equal to a third angle; the third angle is 50 degrees.

6. The vehicle light optical system according to claim 1, characterized in that: The light collecting structure (2) further comprises a first cut-off line structure located on the reflective surface (22), wherein the first cut-off line structure is configured to destroy the local reflective effect of the reflective surface (22); at least one focus of the light emitting structure (1) is located at the first cut-off line structure.

7. The vehicle light optical system according to claim 6, characterized in that: The light collecting structure (2) specifically comprises a cutting surface (23) formed by cutting the reflecting surface (22), and the shape of a first boundary line (201) between the reflecting surface (22) and the cutting surface (23) is adapted to the shape of a light type cut-off line; Alternatively, the reflective surface (22) of the light-collecting 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 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-type cut-off line; Alternatively, the optical unit (100) further comprises a first splicing portion (3) located at the rear end of the light collecting structure (2), the first splicing portion (3) being made of a non-transparent material, and the shape of a splicing interface between the first splicing portion (3) and the light collecting structure (2) and a second boundary line (203) of the reflecting surface (22) being adapted to the shape of a light type cut-off line.

8. The vehicle light optical system according to claim 1, characterized in that: The optical unit (100) further comprises a second cut-off line structure located downstream of the reflective surface (22) on the optical path, the second cut-off line structure being configured to block a portion of light emitted from the reflective surface (22) toward the light emitting structure (1); at least one focus of the light emitting structure (1) is located at the second cut-off line structure.

9. The vehicle light optical system according to claim 8, characterized in that: The second cut-off line structure comprises a groove (4) located in the lower side area of ​​the optical unit (100); the groove (4) comprises a first side surface (41) close to the light collecting structure (2) and a second side surface (42) away from the light collecting structure (2); the shape of a third boundary line (401) between the first side surface (41) and the second side surface (42) is adapted to the shape of the light type cut-off line.

10. The vehicle light optical system according to claim 9, characterized in that: The optical unit (100) further comprises a second splicing portion (5) located in the groove (4), wherein the second splicing portion (5) is made of a non-transparent material; or, At least one of the first side surface (41) and the second side surface (42) is coated with a high absorption material or a high reflection material.

11. The vehicle light optical system according to claim 1, characterized in that: The light emitting structure (1) specifically comprises a first light emitting surface (11); the light collecting structure (2) is configured to form an intermediate light image at a focal plane of the first light emitting surface (11); and the first light emitting surface (11) is configured to image the intermediate light image in front of the headlight optical system.

12. The vehicle light optical system according to claim 1, characterized in that: The light emitting structure (1) specifically comprises a second light emitting surface (12), a second light incident surface (13) and a third light emitting surface (14) which are sequentially arranged along the light path; the light collecting structure (2) is constructed to form an intermediate light image at a common focal plane of the second light emitting surface (12), the second light incident surface (13) and the third light emitting surface (14); the second light emitting surface (12), the second light incident surface (13) and the third light emitting surface (14) are constructed to image the intermediate light image in front of the vehicle light optical system.

13. The vehicle light optical system according to claim 12, characterized in that: The second light emitting surface (12) is configured to control the lateral distribution of light.

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

15. The vehicle light optical system according to claim 13, characterized in that: The second light emitting surface (12), the second light incident surface (13) and the third light emitting surface (14) are configured to jointly control the vertical distribution of light.

16. The vehicle light optical system according to claim 15, characterized in that: At least one of the second light emitting surface (12), the second light incident surface (13) and the third light emitting surface (14) comprises one or more optical surfaces configured to adjust the propagation direction of light in the up and down directions.

17. The vehicle light optical system according to claim 12, characterized in that: The light collecting structure (2) further comprises a first cut-off line structure located on the reflective surface (22), wherein the first cut-off line structure is configured to destroy a local reflective effect of the reflective surface (22); a focal point of the second light emitting surface (12) in the left-right direction is located at the first cut-off line structure; and a focal point of the second light emitting surface (12), the second light incident surface (13) and the third light emitting surface (14) in the up-down direction is located at the first cut-off line structure.

18. The vehicle light optical system according to claim 12, characterized in that: The optical unit (100) further comprises a second cut-off line structure located downstream of the reflective surface (22) on the optical path, the second cut-off line structure being configured to block part of the light emitted from the reflective surface (22) toward the light emitting structure (1); the focal point of the second light emitting surface (12) in the left-right direction is located at the second cut-off line structure; and the focal points of the second light emitting surface (12), the second light incident surface (13) and the third light emitting surface (14) in the up-down direction are located at the second cut-off line structure.

19. A vehicle lamp module, characterized in that: The vehicle light optical system comprises the vehicle light optical system as claimed in any one of claims 1 to 18.

20. A vehicle, characterized in that: Comprising the vehicle light module as claimed in claim 19.

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