Light source multilayer structure

Abstract

The application provides a light source multilayer structure, and relates to the technical field of light sources. The light source multilayer structure comprises a printed circuit board provided with a light source, a light guide layer, a first reflection layer and a surface layer. The light guide layer is connected to one side of the printed circuit board provided with the light source. The first reflection layer is arranged on the side of the light guide layer away from the printed circuit board, and the first reflection layer is provided with a first light transmission part. The surface layer is arranged on the side of the first reflection layer away from the light guide layer, the surface layer is provided with a second light transmission part, and the first light transmission part and the second light transmission part are in optical communication. The light source multilayer structure adopts the printed circuit board, is reliable in structure, convenient to assemble, is beneficial to reducing the thickness of products, saving space and improving optical transmission efficiency.

Description

Technical Field

[0001] This utility model relates to the field of light source technology, and in particular to a multi-layer structure for a light source. Background Technology

[0002] In the field of light source technology, to achieve efficient light transmission, uniform light output, and structural integration, a multi-layered structure consisting of a light guide layer, a reflective layer, and a surface layer has become the mainstream design direction, widely used in display backlighting, lighting equipment, and sensing devices. However, existing multi-layered light source structures result in thicker products, occupy more space, and are inconvenient for assembly. Utility Model Content

[0003] The purpose of this invention is to provide a multi-layer structure for a light source that is reliable, easy to assemble, and helps to reduce product thickness, save space, and improve optical transmission efficiency.

[0004] This utility model provides a multi-layer structure for a light source, comprising: A printed circuit board connected to a light source; A light guide layer is provided with a mounting groove for accommodating the light source; the light guide layer is connected to the side of the printed circuit board with the light source. A first reflective layer is disposed on the side of the light guide layer away from the printed circuit board; the first reflective layer has a first light-transmitting portion; A surface layer is disposed on the side of the first reflective layer away from the light guide layer; the surface layer is provided with a second light-transmitting portion; the first light-transmitting portion and the second light-transmitting portion are connected in optical path.

[0005] In an optional embodiment, the light guide layer and the printed circuit board are joined by at least one of snap-fit, abutment, adhesive, and riveting.

[0006] In an optional embodiment, one of the light guide layer and the printed circuit board is provided with a rivet post, and the other is provided with a rivet hole, with the rivet post passing through the rivet hole.

[0007] In an optional embodiment, the depth of the mounting groove is less than or equal to one-third of the thickness of the light guide layer.

[0008] In an optional embodiment, the distance between the wall of the mounting groove and the surface of the light source is greater than or equal to 0.05 mm.

[0009] In an optional embodiment, the first reflective layer includes at least one of a reflective film and a reflective ink layer, and the first light-transmitting portion includes a first through-hole penetrating the reflective film or the reflective ink layer.

[0010] In an optional embodiment, the surface layer is a non-transparent layer or a transparent film, and the second light-transmitting portion includes a second through hole disposed in the non-transparent layer.

[0011] In an optional embodiment, the non-transparent layer may be a flexible layer or a rigid layer.

[0012] In an optional embodiment, the surface layer is a transparent film, and a patterned layer is provided between the transparent film and the first reflective layer; the patterned layer has a third through hole at the location corresponding to the first light-transmitting part, or has a light-transmitting coating at the location corresponding to the first light-transmitting part.

[0013] In an optional embodiment, the first reflective layer and the light guide layer are connected by hot pressing, bonding, or insert injection molding.

[0014] In an optional embodiment, the first reflective layer and the surface layer are connected by hot pressing or bonding.

[0015] In an optional embodiment, the printed circuit board is made of a rigid material.

[0016] In an optional embodiment, the printed circuit board has a second reflective layer on the side having the light source.

[0017] In an optional embodiment, the light guide layer is made of a transparent or translucent material.

[0018] In an optional implementation, the light source is a direct-up and / or side-emitting light source.

[0019] The multi-layer light source structure provided in this embodiment of the utility model has the following beneficial effects: The multi-layer structure of this light source uses printed circuit boards, which has high structural strength, good support for the light source, convenient assembly, and a compact structure, which helps to reduce product thickness, save space, improve optical transmission efficiency, and reduce optical path loss. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the multi-layer structure of the light source provided in the embodiment of this utility model; Figure 2 A schematic diagram of a printed circuit board with a multilayer structure for a light source provided in an embodiment of this utility model; Figure 3 A schematic diagram of the light guide layer of the multi-layer structure of the light source provided in the embodiment of this utility model; Figure 4 An assembly diagram of the printed circuit board and light guide layer of the multilayer structure of the light source provided in this embodiment of the utility model; Figure 5 A schematic diagram of a mounting slot for accommodating multiple light sources in a multi-layer light source structure provided in an embodiment of this utility model; Figure 6 A schematic diagram of the printed circuit board and light guide layer of the multi-layer structure of the light source provided in this embodiment of the utility model before thermal riveting; Figure 7 A schematic diagram of the printed circuit board and light guide layer of the multi-layer structure of the light source provided in this embodiment of the utility model after thermal riveting; Figure 8 A schematic diagram of the first structure of the multi-layer light source provided in the embodiment of this utility model, which adopts a direct-up light source; Figure 9 A schematic diagram of the first structure of the multi-layer light source provided in the embodiment of this utility model, which adopts a side-emitting light source; Figure 10 A schematic diagram of the second structure of the multi-layer light source provided in the embodiment of this utility model, which adopts a direct-up light source; Figure 11 A schematic diagram of the lamination and injection molding of the light guide layer and transparent film of the multi-layer structure of the light source provided in the embodiment of this utility model; Figure 12 A schematic diagram of the second structure of the multi-layer light source provided in the embodiment of this utility model, which adopts a side-emitting light source; Figure 13 A schematic diagram of a third type of multilayer structure of the light source provided in this embodiment of the utility model; Figure 14 A schematic diagram of the optical path propagation of a direct-up light source in a multi-layer structure provided in this embodiment of the present invention; Figure 15 A schematic diagram of the optical path propagation of a side-emitting light source in a multi-layer structure of the light source provided in this embodiment of the utility model; Figure 16 A schematic diagram showing the application scenarios of the multi-layer light source structure provided in this embodiment of the present invention in a vehicle.

[0022] Icons: 110-Printed circuit board; 111-Light source; 120-Light guide layer; 121-Mounting groove; 123-Riveting post; 125-Rivet head; 130-First reflective layer; 131-First through hole; 1301-Reflective film; 1303-Reflective ink layer; 140-Surface layer; 141-Second through hole; 1401-Non-transparent layer; 1403-Transparent film; 150-Patterned layer; 151-Third through hole; 101-Fixed mold. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0030] The present invention provides a multi-layer structure for a light source, which is reliable, easy to assemble, and helps to reduce product thickness and save space.

[0031] Please combine Figure 1 The multi-layer structure of this light source includes a printed circuit board 110 with a light source 111, a light guide layer 120, a first reflective layer 130, and a surface layer 140. The light guide layer 120 is connected to the side of the printed circuit board 110 with the light source 111. The first reflective layer 130 is located on the side of the light guide layer 120 away from the printed circuit board 110, and has a first light-transmitting portion. The surface layer 140 is located on the side of the first reflective layer 130 away from the light guide layer 120, and has a second light-transmitting portion. The first and second light-transmitting portions are optically connected. Here, optically connected means that light can enter the second light-transmitting portion from the first light-transmitting portion to achieve light emission. Due to the use of the printed circuit board 110, the structure has high strength, good support for the light source 111, and good optical path stability. Furthermore, it is easy to assemble and has a compact structure, which helps reduce product thickness, saves space, and improves optical transmission efficiency while reducing light path loss. This provides a practical solution for achieving the goals of low space and low cost in ambient lighting products.

[0032] Please combine Figure 2 and Figure 3 Optionally, the light guide layer 120 is provided with a mounting groove 121 for accommodating the light source 111. The mounting groove 121 and the light source 111 are arranged in a one-to-one correspondence. In this embodiment, the mounting groove 121 is formed on the side of the light guide layer 120 near the printed circuit board 110. The setting of the mounting groove 121 is beneficial to improving optical transmission efficiency, reducing optical mixing section, reducing light energy loss, and improving overall optical utilization.

[0033] Please combine Figure 4Optionally, the depth of the mounting groove 121 is less than or equal to one-third of the thickness of the light guide layer 120, which effectively ensures the diffusion effect of the light guide layer 120. The distance L between the groove wall of the mounting groove 121 and the surface of the light source 111 is greater than or equal to 0.05mm, where the groove wall includes the side walls and bottom walls of the mounting groove 121. This design, on the one hand, helps to reduce assembly difficulty, allows for a certain assembly error while ensuring that the light source 111 is not damaged. On the other hand, it can reduce light energy loss, reduce optical mixing section, and improve overall optical utilization.

[0034] Please combine Figure 5 In some other embodiments, a mounting slot 121 may also accommodate multiple light sources 111, which is not specifically limited here.

[0035] Optionally, the printed circuit board 110 may be made of a rigid material, such as FR4, polytetrafluoroethylene (PTFE), polyimide (PI), metal, or ceramic, etc., without specific limitations. Conductive lines are printed on the surface of the printed circuit board 110, and other necessary components, including but not limited to capacitors, resistors, and chips, are mounted on its surface. To improve light reflection, a second reflective layer (not shown) is also printed on the surface of the printed circuit board 110. The second reflective layer may be white ink, increasing reflectivity and further improving light utilization.

[0036] Please combine Figure 6 and Figure 7 Optionally, the light guide layer 120 is a transparent or semi-transparent plastic layer with a diffusion effect. The light guide layer 120 and the printed circuit board 110 are joined by at least one of the following methods: snap-fit, abutment, adhesive, and riveting. For example, one of the light guide layer 120 and the printed circuit board 110 may have a riveting post 123, and the other may have a riveting hole. The riveting post 123 passes through the riveting hole, and after passing through the riveting hole, a rivet head 125 with a cross-sectional dimension larger than the riveting hole is formed at the end of the riveting post 123 to prevent the riveting post 123 from falling off. In this embodiment, the light guide layer 120 has a riveting post 123, and the printed circuit board 110 has a riveting hole. The riveting post 123 passes through the riveting hole, and the light guide layer 120 and the printed circuit board 110 are fixedly connected by hot-press riveting, resulting in a reliable structure.

[0037] In other embodiments, the light guide layer 120 and the printed circuit board 110 can be connected by snap-fit ​​or abutment. For example, a first housing is connected to the side of the printed circuit board 110 away from the light guide layer 120, and a second housing is connected to the side of the light guide layer 120 away from the printed circuit board 110. The first housing and the second housing are connected to clamp the printed circuit board 110 and the light guide layer 120, thereby achieving abutment fixation between the light guide layer 120 and the printed circuit board 110.

[0038] Optionally, the first reflective layer 130 includes at least one of a reflective film 1301 and a reflective ink layer 1303, and the first light-transmitting portion includes a first through-hole 131 penetrating the reflective film 1301 or the reflective ink layer 1303. It is understood that the first reflective layer 130 may include only the reflective film 1301, only the reflective ink layer 1303, or a combination of both. For example, a portion of the first reflective layer 130 may use the reflective film 1301, and another portion may use the reflective ink layer 1303. The first reflective layer 130 is mainly used for light reflection, allowing light to emit light along the predetermined light-transmitting portion after one or more reflections, thereby improving the product's lighting effect or ambient effect. The surface layer 140 may be a non-transparent layer 1401 or a transparent film 1403, and the second light-transmitting portion includes a second through-hole 141 disposed in the non-transparent layer 1401. It should be understood that if the surface layer 140 uses a transparent film 1403, the transparent film 1403 itself can serve as a light-transmitting part, so there is no need to open an additional light-emitting hole on the transparent film 1403.

[0039] Optionally, the first reflective layer 130 and the light guide layer 120 are connected by hot pressing, bonding, or insert injection molding. The first reflective layer 130 and the surface layer 140 are connected by hot pressing or bonding.

[0040] Please combine Figure 8 The material or color of the surface layer 140 is selected according to the actual needs of the product. If the surface layer 140 uses a non-transparent layer 1401, such as a flexible layer like a soft skin, a second through-hole 141 needs to be opened in the surface layer 140 as a light-emitting hole. The skin color of this surface layer 140 is not limited and is suitable for situations where the product surface is a soft material. Of course, the non-transparent layer 1401 can also be a hard layer. The first reflective layer 130 uses a reflective film 1301. For example, a white reflective film 1301 can be used, as white can improve the reflectivity of the film. The white reflective film 1301 has a first through-hole 131, and the first through-hole 131 and the second through-hole 141 are arranged coaxially. The shape and size of the first through-hole 131 and the second through-hole 141 can be the same or different, and can be flexibly set according to actual needs. In this embodiment, the cross-section of the second through hole 141 is larger than that of the first through hole 131. This design can ensure the light output effect while allowing for certain assembly and processing errors, thus reducing the difficulty of the process and the manufacturing cost.

[0041] Optionally, the soft surface layer 140 and the reflective film 1301 can be fixed by lamination, such as by hot pressing or bonding. The reflective film 1301 and the light guide layer 120 can also be fixed by lamination, such as by hot pressing or bonding.

[0042] Optionally, the light source 111 can be a direct-mounted or side-emitting light source 111; no specific limitation is made here. For example... Figure 8As shown, light source 111 adopts a direct-up light emission method. Figure 9 As shown, the light source 111 is a side-emitting light source 111. In some embodiments, the multiple light sources 111 may include both direct-emitting light sources and side-emitting light sources.

[0043] Please combine Figure 10 If the surface layer 140 uses a transparent film 1403, it is suitable for applications where the product surface is a hard material. Of course, the transparent film 1403 can also be made of a soft material; no specific limitation is made here. The first reflective layer 130 uses a reflective ink layer 1303. Optionally, a pattern layer 150 is provided between the transparent film 1403 and the first reflective layer 130. The pattern layer 150 can enrich the light emission effect and improve the separation effect. Different patterns or colors can be designed through the pattern layer 150 to serve as signal markers, achieving differentiation of the marking function. It can be understood that the pattern layer 150 has a third through-hole 151 corresponding to the first light-transmitting part, or has a light-transmitting coating corresponding to the first light-transmitting part, to improve light emission efficiency. In this embodiment, printing ink is used to form an ink pattern layer 150 on the side of the transparent film 1403 near the light guide layer 120, and a third through hole 151 is formed in the light-emitting area corresponding to the first light-transmitting part for corresponding avoidance, or ink with high light transmittance is printed in the light-emitting area corresponding to the first light-transmitting part, thereby realizing that light is emitted along a preset light path, improving light efficiency and atmosphere effect.

[0044] Please combine Figure 11 In this embodiment, an ink pattern layer 150 is first printed on one side of the transparent film 1403, followed by a reflective ink layer 1303. The transparent film 1403 with the printed pattern layer 150 and reflective ink layer 1303 is placed on the fixed mold 101 side of the injection mold, with the side of the transparent film 1403 without printed ink in contact with the mold. Transparent plastic is then injection molded onto the back side of the transparent film 1403 (the side with printed ink), thus forming the light guide layer 120.

[0045] It is understood that in this embodiment, the transparent film 1403 adopts an IML (In-Mold Labeling) film. The pattern layer 150 will not wear or fade due to friction, scratches, or contact with chemicals, and its service life is far longer than that of traditional surface decoration processes such as screen printing and water transfer printing. Injection molding and decoration are completed simultaneously, eliminating the need for additional labeling and printing processes, reducing production steps, lowering labor costs, and making it suitable for mass production. Furthermore, the IML film is conducive to achieving complex patterns and textures (such as textures, metallic luster, and gradient colors), and the transparent film 1403 can make the pattern present a high-definition, three-dimensional visual effect, enhancing the product's appearance and texture.

[0046] Please combine Figure 12The surface layer 140 uses a transparent film 1403, the first reflective layer 130 uses a reflective ink layer 1303, and the light source 111 uses a side-emitting light source. This is a multi-layer structure diagram of a light source.

[0047] Please combine Figure 13 Optionally, in some embodiments, the surface layer 140 may also be made of a semi-reflective, semi-transparent material, which can be a soft or hard material. The surface layer 140 has a second through-hole 141. The first reflective layer 130 is made of at least one of a reflective ink layer 1303 and a reflective film 1301, and the first reflective layer 130 has a first through-hole 131. The second through-hole 141 is correspondingly disposed to the first through-hole 131. A pattern layer 150 is disposed between the first reflective layer 130 and the surface layer 140. The pattern layer 150 has a third through-hole 151 at a location corresponding to the second through-hole 141, or has a light-transmitting coating at a location corresponding to the second through-hole 141, thereby improving light extraction efficiency. In this embodiment, the pattern layer 150 uses an ink pattern. For example, printing ink can be used to form an ink pattern layer on the side of the semi-reflective, semi-transparent surface layer 140 near the light guide layer 120.

[0048] The assembly process of the multi-layered structure of this light source is as follows: If adopted Figure 8 The structure shown allows for the sequential bonding of the first reflective layer 130 and the surface layer 140 onto the light guide layer 120, followed by the assembly of the light guide layer 120, the first reflective layer 130, and the surface layer 140 with the printed circuit board 110.

[0049] If adopted Figure 10 The structure shown allows for the initial printing of a pattern layer 150 and a reflective ink layer 1303 onto a transparent film 1403 to form a surface assembly. A light guide layer 120 is then injection molded. During the injection molding process of the light guide layer 120, the surface assembly is placed in the injection mold as an insert, achieving connection between the surface assembly and the light guide layer 120. Finally, the entire assembly is assembled with a printed circuit board 110.

[0050] Please combine Figure 14 and Figure 15 The light emission principle of this multi-layered light source is as follows: If the light source 111 adopts a direct-up light emission, after the light from the light source 111 is diffused through the light guide layer 120, some light rays can be directly emitted from the first through hole 131 and the second through hole 141; some light rays will be reflected by the first reflective layer 130, and after reflection, they will reach the second reflective layer, and after reflection from the second reflective layer, they will be emitted from the first through hole 131 and the second through hole 141; the number of reflections is unlimited.

[0051] If the light source 111 adopts a side-emitting method, after the light from the light source 111 is diffused through the light guide layer 120, some light rays can be emitted directly from the first through hole 131 and the second through hole 141; some light rays will be reflected by the second reflective layer and emitted from the first through hole 131 and the second through hole 141 after reflection, or reflected by the second reflective layer to the first reflective layer 130, reflected by the first reflective layer 130 to the second reflective layer, and emitted from the first through hole 131 and the second through hole 141 after reflection; the number of reflections is unlimited.

[0052] Designed according to the actual needs of the light-emitting pattern, the multi-layer structure of the same light source can also include both direct-emitting light source and side-emitting light source, as long as light can ultimately be emitted from the first light-transmitting part and the second light-transmitting part. No specific limitation is made here.

[0053] Please combine Figure 16 This multi-layered light source has a wide range of applications and can be used in vehicles, such as in any one or more areas of the dashboard (A), center console (B), and door panels (C).

[0054] The multi-layer structure of the light source provided in this embodiment of the utility model has the following beneficial effects, including: The multi-layered structure of this light source utilizes a printed circuit board 110, which provides high structural strength, excellent support for the light source 111, and convenient assembly. Its compact structure also helps reduce product thickness and saves space. The mounting groove 121 on the light guide layer 120 helps protect the light source 111, stabilizes the light path, and improves optical transmission efficiency while reducing light path loss. The surface layer 140 can be made of a non-transparent material or a transparent film 1403, adaptable to both soft and hard materials on the product surface, offering good flexibility and a wide range of applications. The light guide layer 120 and the printed circuit board 110 are joined by riveting or snap-fit ​​methods, ensuring a reliable structure and convenient assembly, thus contributing to the goal of low space and low cost for ambient lighting products.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Any modifications, equivalent substitutions, improvements, etc., should be included within the protection scope of this utility model.

Claims

1. A multi-layer structure for a light source, characterized in that, include: A printed circuit board (110) is provided with a light source (111). A light guide layer (120) is attached to the side of the printed circuit board (110) having a light source (111); A first reflective layer (130) is disposed on the side of the light guide layer (120) away from the printed circuit board (110); the first reflective layer (130) is provided with a first light-transmitting portion; A surface layer (140) is disposed on the side of the first reflective layer (130) away from the light guide layer (120); the surface layer (140) is provided with a second light-transmitting part; the first light-transmitting part and the second light-transmitting part are connected in optical path.

2. The multi-layer structure of the light source according to claim 1, characterized in that, The light guide layer (120) and the printed circuit board (110) are joined by at least one of the following methods: snap-fit, abutment, adhesive, and riveting.

3. The multi-layer structure of the light source according to claim 1, characterized in that, Of the light guide layer (120) and the printed circuit board (110), one is provided with a rivet post (123) and the other is provided with a rivet hole, with the rivet post (123) passing through the rivet hole.

4. The multi-layer structure of the light source according to claim 1, characterized in that, The light guide layer (120) is provided with a mounting groove (121) for accommodating the light source (111).

5. The multi-layer structure of the light source according to claim 4, characterized in that, The depth of the mounting groove (121) is less than or equal to one-third of the thickness of the light guide layer (120).

6. The multi-layer structure of the light source according to claim 4, characterized in that, The distance between the wall of the mounting groove (121) and the surface of the light source (111) is greater than or equal to 0.05 mm.

7. The multi-layer structure of the light source according to claim 1, characterized in that, The first reflective layer (130) includes at least one of a reflective film (1301) and a reflective ink layer (1303), and the first light-transmitting portion includes a first through hole (131) penetrating the reflective film (1301) or the reflective ink layer (1303).

8. The multi-layer structure of the light source according to claim 1, characterized in that, The surface layer (140) is a non-transparent layer (1401) or a transparent film (1403), and the second light-transmitting part includes a second through hole (141) provided in the non-transparent layer (1401).

9. The multi-layer structure of the light source according to claim 8, characterized in that, The non-transparent layer (1401) can be a flexible layer or a rigid layer.

10. The multi-layer structure of the light source according to claim 8, characterized in that, The surface layer (140) is a transparent film (1403), and a pattern layer (150) is provided between the transparent film (1403) and the first reflective layer (130); the pattern layer (150) is provided with a third through hole (151) at the position corresponding to the first light-transmitting part, or has a light-transmitting coating at the position corresponding to the first light-transmitting part.

11. The multi-layer structure of the light source according to claim 1, characterized in that, The first reflective layer (130) and the light guide layer (120) are connected by hot pressing, bonding or insert injection molding.

12. The multi-layer structure of the light source according to claim 1, characterized in that, The first reflective layer (130) and the surface layer (140) are connected by hot pressing or bonding.

13. The multi-layer structure of the light source according to claim 1, characterized in that, The printed circuit board (110) is made of a rigid material.

14. The multi-layer structure of the light source according to claim 1, characterized in that, The printed circuit board (110) has a second reflective layer on one side of the light source (111).

15. The multi-layer structure of the light source according to claim 1, characterized in that, The light guide layer (120) is made of transparent or semi-transparent material.

16. The multi-layer structure of the light source according to any one of claims 1 to 15, characterized in that, The light source (111) is a direct-up and / or side-emitting light source.

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