Function multiplexing optical system and vehicle lamp

Abstract

The invention belongs to the technical field of car lamps, and particularly relates to a function multiplexing optical system and a car lamp, an optical unit comprises a first light collection structure, a second light collection structure, a first light guide structure and a second light guide structure, and the first light collection structure and the second light collection structure are arranged front and back; the first light guide structure and the second light guide structure are arranged up and down. After light rays emitted by the first light source pass through the first light collecting structure, one part of the light rays reach the c1 inclined reflecting surface, are reflected by the c1 inclined reflecting surface and then are emitted, and the other part of the light rays reach the d2 inclined reflecting surface, are reflected by the d2 inclined reflecting surface and then are emitted; one part of light reaches the inclined reflecting surface d1, is reflected by the inclined reflecting surface d1 and then is emitted, the other part of light reaches the inclined reflecting surface c2, is reflected by the inclined reflecting surface c2 and then is emitted, the light guide structures are arranged up and down, each light guide structure comprises a plurality of inclined reflecting surfaces which are arranged front and back and are connected in a step shape along the y direction, and the uniformity of the reflected light is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle lamps, and in particular to a function-multiplexing optical system and a vehicle lamp. Background Art

[0002] In modern lighting technology, achieving multi-functional multiplexing has become an important development direction. This demand usually requires that the light source can emit at least two different colors of light to meet the lighting needs of different scenes and purposes. A common solution is to use a light source with two light colors and place it at the focus of the same optical unit. This design seems simple, but in fact it has significant defects. Due to the limitations of physical and optical properties, it is difficult to ensure that both light colors can be perfectly focused on the focus of the same optical unit. Therefore, in practical applications, at least one color of the light source often deviates from the focus, resulting in uneven lighting.

[0003] In order to overcome this defect, the prior art usually adopts at least two optical units, corresponding to light sources of different colors. This design can ensure that each color of the light source can be accurately focused on the focal point of its corresponding optical unit, thereby achieving a more uniform lighting effect. However, this solution is not perfect. First, it has certain limitations on the spatial size, because each light source needs to be equipped with an independent optical unit, which increases the complexity and manufacturing cost of the equipment to a certain extent; secondly, when only a single color of light source is lit, a dark area may be formed, thereby affecting the overall lighting effect. In addition, since part of the light may not be effectively utilized, this design also has the problem of low light utilization. Summary of the invention

[0004] The technical problem to be solved by the present invention is: in order to solve the technical problems of low light utilization and poor light uniformity in the prior art, the present invention provides a functional multiplexing optical system and a car light with high light utilization and improved lighting uniformity.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a function-multiplexing optical system, which includes: an optical unit, a first light source and a second light source,

[0006] The optical unit comprises:

[0007] a first light collecting structure and a second light collecting structure, wherein the first light collecting structure and the second light collecting structure are arranged front and back along the x direction, the focus of the first light source is located at or near the focus of the first light collecting structure, and the focus of the second light source is located at or near the focus of the second light collecting structure;

[0008] A first light guide structure and a second light guide structure, wherein the first light guide structure and the second light guide structure are arranged up and down along the z direction, the first light guide structure comprises a c1 inclined reflection surface and a d1 inclined reflection surface, the c1 inclined reflection surface and the d1 inclined reflection surface are arranged front and back along the x direction, and are connected in a stepped manner along the y direction, and the second light guide structure comprises a c2 inclined reflection surface and a d2 inclined reflection surface, the c2 inclined reflection surface and the d2 inclined reflection surface are arranged front and back along the x direction, and are connected in a stepped manner along the y direction;

[0009] Among them, after the light emitted by the first light source is collimated by the first light collecting structure, part of the light reaches the c1 inclined reflection surface and is reflected by it and then emitted, and the other part of the light reaches the d2 inclined reflection surface and is reflected by it and then emitted; after the light emitted by the second light source is collimated by the second light collecting structure, part of the light reaches the d1 inclined reflection surface and is reflected by it and then emitted, and the other part of the light reaches the c2 inclined reflection surface and is reflected by it and then emitted.

[0010] The specific technical effect is that light sources with different functions are equipped with independent light collecting structures, which ensures that each color of light source can be emitted as close to parallel light or at a small angle as possible, thereby achieving a more uniform lighting effect. After the light emitted by each light source enters its corresponding light collecting structure, it will be divided into two parts: one part of the light is reflected by the first light guide structure closer to it, and the other part of the light continues to propagate downward for a distance and then is reflected by the second light guide structure below. In view of the fact that the light intensity emitted from the center of the light collecting structure is higher than that emitted from the edge, an up and down distribution design is adopted: high-intensity light is propagated farther (i.e., it is propagated to the second light guide structure below and then reflected), while weaker light is propagated shorter (i.e., it is propagated to the first light guide structure above and then reflected). This design improves the uniformity of light in the z direction for each light source;

[0011] In addition, each light-guiding structure includes a plurality of inclined reflective surfaces, and the plurality of inclined reflective surfaces are designed to be arranged front to back and connected in a stepped manner along the y direction. Compared with the conventional method of using a whole optical surface, due to the integrity and continuity of the large optical surface, the light may produce focusing or defocusing phenomena in certain areas. After the present invention divides each light-guiding structure into a plurality of inclined reflective surfaces, each inclined reflective surface can be regarded as a small, relatively independent reflector. In this way, the light emitted by the light-collecting structure is equally divided into several small areas. The smaller the area, the better the lighting effect, thereby improving the uniformity in the Y direction, which alleviates the problem of uneven lighting caused by a single color passing only through the light-collecting structure. Through the structural design of the present invention, the lighting between each area is more uniform.

[0012] Further, the c1 inclined reflection surface and the d2 inclined reflection surface are arranged vertically and directly below the first light collecting structure along the z direction, the d1 inclined reflection surface and the c2 inclined reflection surface are arranged vertically and directly below the second light collecting structure along the z direction, the projection length of the first light collecting structure along the x direction is L1, the projection lengths of the c1 inclined reflection surface and the d2 inclined reflection surface along the x direction are both L11, the projection length of the second light collecting structure along the x direction is L2, and the projection lengths of the c2 inclined reflection surface and the d1 inclined reflection surface along the x direction are both L22,

[0013] Among them, L1=L11, L2=L22.

[0014] The specific technical effects are: the design of L1=L11 enables the light emitted by the first light collecting structure to be completely received and reflected by the c1 inclined reflection surface and the d2 inclined reflection surface in the x direction, and the c1 inclined reflection surface and the d2 inclined reflection surface adopt a vertical distribution design, which neutralizes the intensity of the emitted light, improves uniformity, improves the utilization rate of light, and has high light efficiency; the design of L2=L22 enables the light emitted by the second light collecting structure to be completely received and reflected by the d1 inclined reflection surface and the c2 inclined reflection surface in the x direction, and the d1 inclined reflection surface and the c2 inclined reflection surface adopt a vertical distribution design, which weakens the difference in the brightness of the emitted light, improves uniformity, improves the utilization rate of light, and has high light efficiency.

[0015] Further, the first light-guiding structure includes a plurality of c1 inclined reflection surfaces and a plurality of d1 inclined reflection surfaces, and the c1 inclined reflection surfaces and the d1 inclined reflection surfaces are alternately arranged front and back along the x direction; the second light-guiding structure includes a plurality of c2 inclined reflection surfaces and a plurality of d2 inclined reflection surfaces, and the c2 inclined reflection surfaces and the d2 inclined reflection surfaces are alternately arranged front and back along the x direction; the projection length of the plurality of c1 inclined reflection surfaces along the y direction plus the projection length of the plurality of d2 inclined reflection surfaces along the y direction is equal to the projection length of the first light collecting structure along the y direction, and the projection length of the plurality of d1 inclined reflection surfaces along the y direction plus the projection length of the plurality of c2 inclined reflection surfaces along the y direction is equal to the projection length of the second light collecting structure along the y direction.

[0016] The specific technical effect is: by adopting this design, the light emitted by the first light guiding structure and the second light guiding structure is divided into multiple parts in the y direction, and the light emitted by the light collecting structure is equally divided into several small areas. The smaller the area, the better the lighting effect, thereby improving the uniformity in the Y direction, which alleviates the problem of uneven lighting caused by a single color passing only through the light collecting structure, and since the sum of the projection lengths of all c1 inclined reflection surfaces and d2 inclined reflection surfaces along the y direction is equal to the projection length of the first light collecting structure along the y direction, and the sum of the projection lengths of all d1 inclined reflection surfaces and c2 inclined reflection surfaces along the y direction is equal to the projection length of the second light collecting structure along the y direction, the light emitted by the first light collecting structure can be completely received and reflected by the c1 inclined reflection surface and the d2 inclined reflection surface in the y direction, and the light emitted by the second light collecting structure can be completely received and reflected by the d1 inclined reflection surface and the c2 inclined reflection surface in the y direction, thereby improving the utilization rate of light and having high light efficiency.

[0017] Furthermore, the c1 inclined reflection surface and the c2 inclined reflection surface are distributed front and back along the x direction, and the d2 inclined reflection surface and the d1 inclined reflection surface are connected to each other.

[0018] Furthermore, it also includes a thick-walled structure, on which a light emitting surface and an auxiliary light guiding structure are provided, the light emitting surface and the auxiliary light guiding structure are arranged on both ends of the thick-walled structure front and back along the x-direction, the auxiliary light guiding structure is used to reflect the light reflected by the first light guiding structure and / or the second light guiding structure, and the light emitting surface is used to refract the light reflected by the auxiliary light guiding structure.

[0019] The specific technical effect is: by setting an auxiliary light-guiding structure to reflect the light reflected by the first light-guiding structure and / or the second light-guiding structure, the light is distributed more evenly after reflection, thereby further improving the uniformity.

[0020] Furthermore, the auxiliary light-guiding structure includes a first auxiliary surface and a second auxiliary surface arranged vertically along the z direction, and the first auxiliary surface and the second auxiliary surface are both inclined. The light emitted by the first light-guiding structure and / or the second light-guiding structure passes through the second auxiliary surface and the first auxiliary surface in turn, and then propagates to the light-emitting surface and then emerges.

[0021] Furthermore, the light emitting surface and / or the auxiliary light guiding structure are provided with patterns.

[0022] The specific technical effect is: setting patterns on the light-emitting surface can also play a role in diffusing light.

[0023] Furthermore, the angles between the first light guide structure and the second light guide structure in the xz plane and the x direction are both in the range of 40° to 50°.

[0024] The specific technical effect is: the lighting uniformity is further improved.

[0025] Furthermore, the optical unit, the first light source and the second light source constitute a group of optical components, and the number of the optical components is multiple, and the multiple optical components are arranged in sequence.

[0026] A vehicle lamp, comprising a function-multiplexing optical system as described in any one of the above items.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] (1) The present invention equips light sources with different functions with independent light collecting structures, which ensures that light sources of each color can emit as nearly parallel light as possible, thereby providing primary output light for subsequent structures, thereby achieving a more uniform lighting effect.

[0029] (2) After the light emitted by each light source enters its corresponding light collecting structure, it will be divided into two parts: one part of the light is reflected by the first light guiding structure closer to it, and the other part of the light continues to propagate downward for a distance and then is reflected by the second light guiding structure below. Since the light intensity emitted from the center of the light collecting structure is higher than the light intensity emitted from the edge, an up-down distribution design is adopted: high-intensity light is propagated farther (i.e., it is propagated to the second light guiding structure below and then reflected), while weaker light is propagated shorter (i.e., it is propagated to the first light guiding structure above and then reflected). This design improves the uniformity of light from each light source in the z direction.

[0030] (3) Each light-guiding structure includes a plurality of inclined reflective surfaces, which are designed to be arranged front to back and connected in a stepped manner along the y direction. Compared with the conventional method of using a whole optical surface, due to the integrity and continuity of the large optical surface, light may be focused or defocused in certain areas. After the present invention divides each light-guiding structure into a plurality of inclined reflective surfaces, each inclined reflective surface can be regarded as a small, relatively independent reflector. In this way, the light emitted by the light-collecting structure is equally divided into a number of small areas. The smaller the area, the better the lighting effect, thereby improving the uniformity in the y direction. This alleviates the problem of uneven lighting caused by a single color passing only through the light-collecting structure.

[0031] (4) The design that the projection lengths of the c1 inclined reflection surface and the d2 inclined reflection surface along the x direction are equal to the projection length of the first light collecting structure along the x direction makes it possible for all the light emitted by the first light collecting structure to be received and reflected by the c1 inclined reflection surface and the d2 inclined reflection surface in the x direction, and the c1 inclined reflection surface and the d2 inclined reflection surface are designed to be distributed up and down, which weakens the difference in the brightness of the emitted light, improves the uniformity, increases the utilization rate of light, and has high light efficiency; the design of L2=L22 makes the light emitted by the second light guiding structure also have the above-mentioned technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0033] Figure 1 It is a structural schematic diagram of Embodiment 1 of a function-multiplexing optical system of the present invention;

[0034] Figure 2 for Figure 1 Schematic diagram of the optical path of the first light collecting structure in the xz plane;

[0035] Figure 3 for Figure 1 Schematic diagram of the optical path of the second light collecting structure in the xz plane;

[0036] Figure 4 It is a structural schematic diagram of Embodiment 2 of a function-multiplexing optical system of the present invention;

[0037] Figure 5 It is a structural schematic diagram of Embodiment 3 of a function-multiplexing optical system of the present invention;

[0038] Figure 6 for Figure 5 Schematic diagram of the optical path in the xz plane.

[0039] In the figure: 1. optical unit; 2. first light source; 3. second light source; 4. first light collecting structure; 5. second light collecting structure; 6. first light guiding structure; 601. c1 inclined reflection surface; 602. d1 inclined reflection surface; 7. second light guiding structure; 701. c2 inclined reflection surface; 702. d2 inclined reflection surface; 8. thick-walled structure; 801. light emitting surface; 9. auxiliary light guiding structure; 901. first auxiliary surface; 902. second auxiliary surface. DETAILED DESCRIPTION

[0040] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing 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 cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] like Figures 1 to 3 FIG. 1 is a preferred embodiment 1 of the present invention, which is a functional multiplexing optical system and a vehicle light, comprising an optical unit 1, a first light source 2 and a second light source 3.

[0044] The optical unit 1 comprises:

[0045] A first light collecting structure 4 and a second light collecting structure 5, wherein the first light collecting structure 4 and the second light collecting structure 5 are arranged front and back along the x direction, the focus of the first light source 2 is located at or near the focus of the first light collecting structure 4, and the focus of the second light source 3 is located at or near the focus of the second light collecting structure 5;

[0046] Two first light guide structures 6 and two second light guide structures 7, the two first light guide structures 6 are arranged in sequence along the y direction, the two second light guide structures 7 are arranged in sequence along the y direction, the first light guide structure 6 and the second light guide structure 7 are arranged up and down along the z direction, the first light guide structure 6 includes a c1 inclined reflection surface 601 and a d1 inclined reflection surface 602, the c1 inclined reflection surface 601 and the d1 inclined reflection surface 602 are arranged front and back along the x direction, and are connected in a stepped manner along the y direction, the second light guide structure 7 includes a c2 inclined reflection surface 701 and a d2 inclined reflection surface 702, the c2 inclined reflection surface 701 and the d2 inclined reflection surface 702 are arranged front and back along the x direction, and are connected in a stepped manner along the y direction;

[0047] Among them, after the light emitted by the first light source 2 is collimated by the first light collecting structure 4, part of the light reaches the c1 inclined reflection surface 601 and is reflected by it and then emitted, and the other part of the light reaches the d2 inclined reflection surface 702 and is reflected by it and then emitted. After the light emitted by the second light source 3 is collimated by the second light collecting structure 5, part of the light reaches the d1 inclined reflection surface 602 and is reflected by it and then emitted, and the other part of the light reaches the c2 inclined reflection surface 701 and is reflected by it and then emitted.

[0048] In this embodiment, the angles between the first light guide structure 6 and the second light guide structure 7 and the x direction in the xz plane are both in the range of 40° to 50°. Preferably, when the angle is 45°, the light output uniformity is better.

[0049] Therefore: light sources with different functions are equipped with independent light collecting structures, which ensures that each color of light source can emit as nearly parallel light as possible, thereby providing primary output light for subsequent structures. After entering its corresponding light collecting structure, the light emitted by each light source will be divided into two parts: one part of the light is reflected by the first light guide structure 6 closer to it, and the other part of the light continues to propagate downward for a distance and then is reflected by the second light guide structure 7 below. Since the light intensity emitted from the center of the light collecting structure is higher than that emitted from the edge, an up-and-down distribution design is adopted: high-intensity light is propagated farther (i.e., propagated to the second light guide structure 7 below and then reflected), while weaker light is propagated shorter (i.e., propagated to the first light guide structure 6 above and closer and then reflected). This design improves the uniformity of light in the z direction for each light source;

[0050] In addition, each light-guiding structure includes a plurality of inclined reflective surfaces, and the plurality of inclined reflective surfaces are designed to be arranged front to back and connected in a stepped manner along the y direction. Compared with the conventional method of using a whole optical surface, due to the integrity and continuity of the large optical surface, light may produce focusing or defocusing phenomena in certain areas. After the present invention divides each light-guiding structure into a plurality of inclined reflective surfaces, each inclined reflective surface can be regarded as a small, relatively independent reflector. In this way, the light emitted by the light collecting structure is equally divided into several small areas. The smaller the area, the better the lighting effect, thereby improving the uniformity in the Y direction, which alleviates the problem of uneven lighting caused by a single color passing only through the light collecting structure. This solves the problem that a large dark area may be formed when a single color light source is lit. Through the structural design of the present invention, the lighting between each area is more uniform.

[0051] In this embodiment, the first light collecting structure 4 and the second light collecting structure 5 and the first light guiding structure 6 and the second light guiding structure 7 may be connected integrally or may be separately arranged.

[0052] In this embodiment, the c1 inclined reflection surface 601 and the d2 inclined reflection surface 702 are arranged vertically and directly below the first light collecting structure 4 along the z direction, the d1 inclined reflection surface 602 and the c2 inclined reflection surface 701 are arranged vertically and directly below the second light collecting structure 5 along the z direction, the projection length of the first light collecting structure 4 along the x direction is L1, the projection length of the c1 inclined reflection surface 601 and the d2 inclined reflection surface 702 along the x direction are both L11, the projection length of the second light collecting structure 5 along the x direction is L2, the projection length of the c2 inclined reflection surface 701 and the d1 inclined reflection surface 602 along the x direction are both L22,

[0053] Among them, L1=L11, L2=L22.

[0054] Therefore: the design of L1=L11 makes it possible for all the light emitted by the first light collecting structure 4 to be received and reflected by the c1 inclined reflection surface 601 and the d2 inclined reflection surface 702 in the x direction, and the c1 inclined reflection surface 601 and the d2 inclined reflection surface 702 adopt a top-down distribution design, which neutralizes the intensity of the emitted light, improves the uniformity, improves the utilization rate of light, and has high light efficiency; the design of L2=L22 makes it possible for all the light emitted by the second light collecting structure 5 to be received and reflected by the d1 inclined reflection surface 602 and the c2 inclined reflection surface 701 in the x direction, and the d1 inclined reflection surface 602 and the c2 inclined reflection surface 701 adopt a top-down distribution design, which weakens the difference in the brightness of the emitted light, improves the uniformity, improves the utilization rate of light, and has high light efficiency.

[0055] In this embodiment, the first light guiding structure 6 includes a plurality of c1 inclined reflection surfaces 601 and a plurality of d1 inclined reflection surfaces 602, and the c1 inclined reflection surfaces 601 and the d1 inclined reflection surfaces 602 are alternately arranged front and back along the x direction. The second light guiding structure 7 includes a plurality of c2 inclined reflection surfaces 701 and a plurality of d2 inclined reflection surfaces 702, and the c2 inclined reflection surfaces 701 and the d2 inclined reflection surfaces 702 are alternately arranged front and back along the x direction. The projection length of the plurality of c1 inclined reflection surfaces 601 along the y direction plus the projection length of the plurality of d2 inclined reflection surfaces 702 along the y direction is equal to the projection length of the first light collecting structure) along the y direction, and the projection length of the plurality of d1 inclined reflection surfaces 602 along the y direction plus the projection length of the plurality of c2 inclined reflection surfaces 701 along the y direction is equal to the projection length of the second light collecting structure 5 along the y direction.

[0056] It should be noted here that: since the c1 inclined reflection surface 601 and the c2 inclined reflection surface 701 are distributed front and back, and the projection lengths along the x and y directions are equal, the brightness of light reflected from the c1 inclined reflection surface 601 and the c2 inclined reflection surface 701 are similar, the d2 inclined reflection surface 702 and the d1 inclined reflection surface 602 are connected to each other, and the projection lengths along the x and y directions are equal, the brightness of light reflected from the d2 inclined reflection surface 702 and the d1 inclined reflection surface 602 are similar, therefore, the projection length of the first light collecting structure 4 along the y direction is set to W1, the projection length of the c1 inclined reflection surface 601 along the y direction is W11, the projection length of the d1 inclined reflection surface 602 along the y direction is W12, the projection length of the second light collecting structure 5 along the y direction is W2, the projection length of the c2 inclined reflection surface 701 along the y direction is W21, and the projection length of the d2 inclined reflection surface 702 along the y direction is W22.

[0057] Wherein, W11=W12=W21=W22, when the first light guide structure (6) and the second light guide structure (7) are equally divided into an even number of inclined reflection surfaces, W1=2N*(W11+W22), W2=2N*(W12+W21), where N=1, 2, 3, 4...; when the first light guide structure (6) and the second light guide structure (7) are equally divided into an odd number of inclined reflection surfaces, W1=2N*(W11+W22)+W11, W2=2N*(W12+W21)+W12, where N=1, 2, 3, 4...

[0058] For details, see Figure 1 As shown, the first light guide structure 6 is equally divided into four inclined reflection surfaces, and the four inclined reflection surfaces are arranged in sequence along the y direction to form an upper light guide structure group, and from left to right they are c1 inclined reflection surface 601-Ⅰ, d1 inclined reflection surface 602-Ⅰ, c1 inclined reflection surface 601-Ⅱ, d1 inclined reflection surface 602-Ⅱ, and two adjacent inclined reflection surfaces are connected in a step-like manner; the second light guide structure 7 is also equally divided into four inclined reflection surfaces, and the four inclined reflection surfaces are arranged in sequence along the y direction to form a lower light guide structure group, and from left to right they are c2 inclined reflection surface 701-Ⅰ, d2 inclined reflection surface 702-Ⅰ, c2 inclined reflection surface 701-Ⅱ, d2 inclined reflection surface 702-Ⅱ, and two adjacent inclined reflection surfaces are connected in a step-like manner;

[0059] Where: W11=W12=W21=W22, so W1=W11+W22+W11+W22, W2=W21+W12+W21+W12; see Figure 1 to Figure 2 As shown, taking the light emitted by the first light source 2 as an example, the working principle is as follows:

[0060] After the light emitted by the first light source 2 is collimated into parallel light or approximately parallel light by the first light guide structure 6, it is divided into four parts and reaches the c1 inclined reflection surface 601-Ⅰ, the d2 inclined reflection surface 702-Ⅰ, the c1 inclined reflection surface 601-Ⅱ, and the d2 inclined reflection surface 702-Ⅱ respectively. The light emitted from the left edge area of ​​the first light guide structure 6 propagates to the c1 inclined reflection surface 601-Ⅰ, and the light emitted from the middle area of ​​the first light guide structure 6 propagates to the d2 inclined reflection surface 702-Ⅰ. Since the c1 inclined reflection surface 601-Ⅰ is closer to the first light guide structure 6 than the d2 inclined reflection surface 702-Ⅰ, based on the principle that the farther the light propagates, the higher the light intensity is usually lost, the light intensity reflected from the c1 inclined reflection surface 601-Ⅰ and the d2 inclined reflection surface 702-Ⅰ is finally similar;

[0061] The light emitted from the middle area of ​​the first light guiding structure 6 propagates to the c1 inclined reflection surface 601-Ⅱ, and the light emitted from the right edge area of ​​the first light guiding structure 6 propagates to the d2 inclined reflection surface 702-Ⅱ. Since the c1 inclined reflection surface 601-Ⅱ is closer to the first light guiding structure 6 than the d2 inclined reflection surface 702-Ⅱ, the light intensity reaching the c1 inclined reflection surface 601-Ⅱ is the strongest among the four surfaces, and the light intensity reaching the d2 inclined reflection surface 702-Ⅱ is the weakest among the four surfaces. However, compared with the traditional method of using a whole optical surface, the light emitted by the light collecting structure is divided into several small areas. The smaller the area, the better the lighting effect, thereby improving the uniformity in the Y direction, which alleviates the problem of uneven lighting caused by a single color passing only through the light collecting structure.

[0062] The optical path principle of the light emitted by the second light source 3 is the same as that described above, and will not be described here with examples.

[0063] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation and protection scope of the present invention.

[0064] The present invention also has the following implementation modes based on the above:

[0065] Embodiment 2:

[0066] like Figure 4 As shown,

[0067] The difference from Example 1 is that:

[0068] The optical unit 1, the first light source 2 and the second light source 3 form a group of optical components. There are multiple optical components, and the multiple optical components are arranged in sequence along the y direction.

[0069] It should be noted here that the arrangement of the optical components can be changed according to actual needs. For example, they can be arranged obliquely, or two adjacent optical components can be symmetrically arranged.

[0070] Embodiment 3:

[0071] like Figure 5 to Figure 6 As shown,

[0072] The difference from Example 2 is that:

[0073] It also includes a thick-walled structure 8, on which a light emitting surface 801 and an auxiliary light guiding structure 9 are provided. The light emitting surface 801 and the auxiliary light guiding structure 9 are arranged on both ends of the thick-walled structure 8 front and back along the x-direction. The auxiliary light guiding structure 9 is used to reflect the light reflected by the first light guiding structure 6 and / or the second light guiding structure 7, and the light emitting surface 801 is used to refract the light reflected by the auxiliary light guiding structure 9.

[0074] In this embodiment, the auxiliary light-guiding structure 9 includes a first auxiliary surface 901 and a second auxiliary surface 902 arranged vertically along the z direction. The first auxiliary surface 901 and the second auxiliary surface 902 are both arranged at an angle. The light emitted by the first light-guiding structure 6 and / or the second light-guiding structure 7 is reflected by the second auxiliary surface 902 and the first auxiliary surface 901 in turn, and then propagates to the light-emitting surface 801 and is emitted.

[0075] In this embodiment, patterns are arranged on the light emitting surface 801 and / or the auxiliary light guiding structure 9 .

[0076] Therefore, by setting a pattern on the light-emitting surface 801, it can also play a role in diffusing light, and the shape of the pattern can be designed as a corn kernel pattern, a stripe pattern or other shaped patterns as needed.

[0077] Embodiment 4:

[0078] In this embodiment, a vehicle lamp is provided, comprising a function-multiplexing optical system as described in any one of the above embodiments.

[0079] Compared with the prior art, the present invention has the following beneficial effects:

[0080] (1) The present invention equips light sources with different functions with independent light collecting structures, which ensures that light sources of each color can emit as nearly parallel light as possible, thereby providing primary output light for subsequent structures, thereby achieving a more uniform lighting effect.

[0081] (2) After the light emitted by each light source enters its corresponding light collecting structure, it will be divided into two parts: one part of the light is reflected by the first light guiding structure closer to it, and the other part of the light continues to propagate downward for a distance and then is reflected by the second light guiding structure below. Since the light intensity emitted from the center of the light collecting structure is higher than the light intensity emitted from the edge, an up-down distribution design is adopted: high-intensity light is propagated farther (i.e., it is propagated to the second light guiding structure below and then reflected), while weaker light is propagated shorter (i.e., it is propagated to the first light guiding structure above and then reflected). This design improves the uniformity of light from each light source in the z direction.

[0082] (3) Each light-guiding structure includes a plurality of inclined reflective surfaces, which are designed to be arranged front to back and connected in a stepped manner along the y direction. Compared with the conventional method of using a whole optical surface, due to the integrity and continuity of the large optical surface, light may be focused or defocused in certain areas. After the present invention divides each light-guiding structure into a plurality of inclined reflective surfaces, each inclined reflective surface can be regarded as a small, relatively independent reflector. In this way, the light emitted by the light-collecting structure is equally divided into a number of small areas. The smaller the area, the better the lighting effect, thereby improving the uniformity in the y direction. This alleviates the problem of uneven lighting caused by a single color passing only through the light-collecting structure.

[0083] (4) The design that the projection lengths of the c1 inclined reflection surface and the d2 inclined reflection surface along the x direction are equal to the projection length of the first light collecting structure along the x direction makes it possible for all the light emitted by the first light collecting structure to be received and reflected by the c1 inclined reflection surface and the d2 inclined reflection surface in the x direction, and the c1 inclined reflection surface and the d2 inclined reflection surface are designed to be distributed up and down, which weakens the difference in the brightness of the emitted light, improves the uniformity, increases the utilization rate of light, and has high light efficiency; the design of L2=L22 makes the light emitted by the second light guiding structure also have the above-mentioned technical effects.

[0084] The above description is based on the ideal embodiment of the present invention. Through the above description, relevant personnel can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A functional multiplexing optical system, characterized in that: include: An optical unit (1), a first light source (2) and a second light source (3), The optical unit (1) comprises: a first light collecting structure (4) and a second light collecting structure (5), wherein the first light collecting structure (4) and the second light collecting structure (5) are arranged front and back along the x direction, the focus of the first light source (2) is located at or near the focus of the first light collecting structure (4), and the focus of the second light source (3) is located at or near the focus of the second light collecting structure (5); A first light guide structure (6) and a second light guide structure (7), wherein the first light guide structure (6) and the second light guide structure (7) are arranged vertically along the z direction, the first light guide structure (6) comprises a c1 inclined reflection surface (601) and a d1 inclined reflection surface (602), the c1 inclined reflection surface (601) and the d1 inclined reflection surface (602) are arranged front to back along the x direction and are connected in a step-like manner along the y direction, and the second light guide structure (7) comprises a c2 inclined reflection surface (701) and a d2 inclined reflection surface (702), the c2 inclined reflection surface (701) and the d2 inclined reflection surface (702) are arranged front to back along the x direction and are connected in a step-like manner along the y direction; Among them, after the light emitted by the first light source (2) is collimated by the first light collecting structure (4), part of the light reaches the c1 inclined reflection surface (601) and is reflected therefrom before being emitted, and another part of the light reaches the d2 inclined reflection surface (702) and is reflected therefrom before being emitted, and after the light emitted by the second light source (3) is collimated by the second light collecting structure (5), part of the light reaches the d1 inclined reflection surface (602) and is reflected therefrom before being emitted, and another part of the light reaches the c2 inclined reflection surface (701) and is reflected therefrom before being emitted.

2. A functional multiplexing optical system as claimed in claim 1, characterized in that: The c1 inclined reflection surface (601) and the d2 inclined reflection surface (702) are arranged vertically directly below the first light collecting structure (4) along the z direction, and the d1 inclined reflection surface (602) and the c2 inclined reflection surface (701) are arranged vertically directly below the second light collecting structure (5) along the z direction. The projection length of the first light collecting structure (4) along the x direction is L1, the projection lengths of the c1 inclined reflection surface (601) and the d2 inclined reflection surface (702) along the x direction are both L11, the projection length of the second light collecting structure (5) along the x direction is L2, and the projection lengths of the c2 inclined reflection surface (701) and the d1 inclined reflection surface (602) along the x direction are both L22. Among them, L1=L11, L2=L22.

3. A functional multiplexing optical system as claimed in claim 2, characterized in that: The first light guiding structure (6) comprises a plurality of c1 inclined reflection surfaces (601) and a plurality of d1 inclined reflection surfaces (602), the c1 inclined reflection surfaces (601) and the d1 inclined reflection surfaces (602) being arranged alternately front to back along the x direction; the second light guiding structure (7) comprises a plurality of c2 inclined reflection surfaces (701) and a plurality of d2 inclined reflection surfaces (702), the c2 inclined reflection surfaces (701) and the d2 inclined reflection surfaces (702) being arranged alternately front to back along the x direction; the projection length of the plurality of c1 inclined reflection surfaces (601) along the y direction plus the projection length of the plurality of d2 inclined reflection surfaces (702) along the y direction is equal to the projection length of the first light collecting structure (4) along the y direction; the projection length of the plurality of d1 inclined reflection surfaces (602) along the y direction plus the projection length of the plurality of c2 inclined reflection surfaces (701) along the y direction is equal to the projection length of the second light collecting structure (5) along the y direction.

4. The function-multiplexing optical system according to claim 1, characterized in that: The c1 inclined reflection surface (601) and the c2 inclined reflection surface (701) are distributed front and back along the x direction, and the d2 inclined reflection surface (702) and the d1 inclined reflection surface (602) are connected to each other.

5. The function-multiplexing optical system according to claim 1, characterized in that: The invention also comprises a thick-walled structure (8), wherein a light emitting surface (801) and an auxiliary light guiding structure (9) are arranged on the thick-walled structure (8), wherein the light emitting surface (801) and the auxiliary light guiding structure (9) are arranged on two ends of the thick-walled structure (8) front and back along the x-direction, wherein the auxiliary light guiding structure (9) is used to reflect light reflected by the first light guiding structure (6) and / or the second light guiding structure (7), and the light emitting surface (801) is used to refract light reflected by the auxiliary light guiding structure (9).

6. A functional multiplexing optical system as claimed in claim 5, characterized in that: The auxiliary light-guiding structure (9) comprises a first auxiliary surface (901) and a second auxiliary surface (902) which are arranged vertically along the z direction, and the first auxiliary surface (901) and the second auxiliary surface (902) are both arranged obliquely, and the light emitted by the first light-guiding structure (6) and / or the second light-guiding structure (7) is reflected by the second auxiliary surface (902) and the first auxiliary surface (901) in sequence, and then propagates to the light-emitting surface (801) and then emerges.

7. The function-multiplexing optical system according to claim 5, characterized in that: The light emitting surface (801) and / or the auxiliary light guiding structure (9) are provided with patterns.

8. The function-multiplexing optical system according to claim 1, characterized in that: The angles between the first light guide structure (6) and the second light guide structure (7) and the x direction in the xz plane are both in the range of 40° to 50°.

9. The function-multiplexing optical system according to claim 1, characterized in that: The optical unit (1), the first light source (2) and the second light source (3) constitute a group of optical components. There are multiple optical components, and the multiple optical components are arranged in sequence.

10. A vehicle lamp, characterized in that: A function-multiplexing optical system comprising any one of claims 1 to 9.

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