A composite light guide module

Abstract

The invention discloses a composite light guide module, comprising a first light guide substrate located at an upper end and a second light guide substrate located at a lower end, the refractive index of the first light guide substrate and the refractive index of the second light guide substrate are both greater than the refractive index of air, a first surface which is at a certain angle to a horizontal plane is arranged at the rear end of the first light guide substrate, a horizontal second surface is arranged at the lower end of the first light guide substrate, the upper end of the first light guide substrate is connected to the front end of the second surface through a reflective surface which is inclined forward and downward, the reflective surface is mainly composed of at least one section of a light guide surface which is inclined downward connected to at least one section of a horizontal horizontal surface, the second light guide substrate is arranged in a rectangular parallelepiped shape, and the upper end surface of the second light guide substrate is in contact with the second surface, thereby improving the utilization rate of light and the stability of propagation.

Description

Technical Field

[0001] The invention relates to the field of optical technology, and in particular to a composite light guide module. Background Art

[0002] With the advancement of science and technology, light-emitting devices such as LEDs and LDs are increasingly used in various fields. However, when the light generated by these devices enters the target medium (such as air or a specific liquid), due to the difference in the refractive index of different media, the light is often refracted and scattered, resulting in low light incident efficiency and poor light propagation stability. Existing light guide modules often cannot effectively control the propagation direction of light, resulting in scattering and attenuation of light when entering the target medium, reducing the efficiency of light use. Therefore, a new light guide module design is continued to improve the incident efficiency and stability of light in the target medium. Summary of the invention

[0003] In order to solve the above-mentioned deficiencies in the prior art, the present invention proposes a composite light guide module, which does not affect the transparency of the target medium, has good light guiding properties, and has a high utilization rate of light.

[0004] In order to achieve the above technical effects, the present invention adopts the following scheme:

[0005] A composite light guide module comprises a first light guide substrate at an upper end and a second light guide substrate at a lower end, the refractive index of the first light guide substrate and the refractive index of the second light guide substrate are both greater than the refractive index of air, the rear end of the first light guide substrate is provided with a first surface which is at a certain angle to a horizontal plane, the lower end of the first light guide substrate is provided with a horizontal second surface, the upper end of the first light guide substrate is connected to the front end of the second surface through a reflective surface which is inclined forward and downward, the reflective surface is mainly composed of at least one section of a light guide surface which is inclined downward connected to at least one section of a horizontal horizontal platform surface, the second light guide substrate is arranged in a rectangular parallelepiped shape, and the upper end surface of the second light guide substrate is in contact with the second surface.

[0006] According to a preferred technical solution, the first surface is provided with a coating layer or a second surface microstructure layer, the coating layer is a single layer or a multilayer, and each coating layer has different functions, including anti-oxidation, heat insulation, anti-ultraviolet, anti-reflection and anti-reflection.

[0007] According to a preferred technical solution, both the light guiding surface and the horizontal platform surface of the first light guiding substrate are covered with a first film layer with high reflectivity or are provided with a first surface microstructure layer.

[0008] A preferred technical solution is that the number of the light-guiding surface is one, the number of the horizontal platform is one, the horizontal platform is located at the upper end of the first light-guiding substrate, the rear end of the horizontal platform is connected to the upper end of the first surface, the upper end of the light-guiding surface is connected to the front end of the horizontal platform, and the lower end of the light-guiding surface is inclined forward and extends to connect to the front end of the second surface.

[0009] A preferred technical solution is that the number of the light-guiding surfaces is at least two, the number of the horizontal surfaces is at least two, and the number of the light-guiding surfaces is consistent with the number of the horizontal surfaces, with one of the light-guiding surfaces being located at the front end, followed by a number of horizontal surfaces and a number of light-guiding surfaces that are connected in sequence and staggered, the lower end of the light-guiding surface located at the front end is connected to the front end of the second horizontal surface, the rear end of the horizontal surface located at the rear end is connected to the upper end of the first surface, the front end of the horizontal surface located in the middle part is connected to the upper end of the front light-guiding surface, and the rear end of the horizontal surface located in the middle part is connected to the lower end of the rear light-guiding surface.

[0010] A preferred technical solution is that the number of the light-guiding surfaces is at least two, the number of the horizontal surfaces is at least one, and the number of the horizontal surfaces is one less than the number of the light-guiding surfaces, and the at least two light-guiding surfaces are arranged in sequence from front to back, the lower end of the light-guiding surface located at the front end is connected to the front end of the second surface, and the upper end of the light-guiding surface located at the rear end is connected to the upper end of the first surface, and at least one horizontal surface is respectively arranged between every two adjacent light-guiding surfaces, the front end of the horizontal surface is connected to the upper end of the front light-guiding surface, and the rear end of the horizontal surface is connected to the lower end of the rear light-guiding surface.

[0011] According to a preferred technical solution, an adhesive layer for fixing and installing the composite light guide module is provided on any one or more horizontal surfaces.

[0012] According to a preferred technical solution, the light-guiding surface is a plane or a free-form surface.

[0013] According to a preferred technical solution, the composite light guide module also includes a horizontally arranged substrate, which is located above the first light guide matrix. The first light guide matrix is ​​fixedly mounted on the lower surface of the substrate, and a light source mounting position is also provided on the lower surface of the substrate behind the first light guide matrix for mounting the light-emitting device.

[0014] In a preferred technical solution, the molding process of the first light guide substrate includes two steps: mold making and injection molding;

[0015] The production of molds includes: design, production, and debugging. The design stage mainly determines the structure, form, and material of the mold according to the geometric shape, size, and requirements of the product, and draws the mold drawings; the production stage mainly selects suitable steel materials for cutting, processing, and assembly according to the mold drawings to produce the mold; the debugging stage mainly debugs the manufactured mold to make it reach the best state;

[0016] Injection molding mainly includes six stages: mold closing, filling, holding pressure, cooling, mold opening and demolding. These six stages are a complete continuous process. The main control parameters of the four stages of filling, holding pressure, cooling and demolding are: temperature control, pressure control and injection speed control. Temperature control refers to barrel temperature control and mold temperature control. The temperature of the front zone is 250℃-270℃, the temperature of the middle zone is 270℃-290℃, and the temperature of the rear zone is 280℃-300℃; mold temperature control refers to the mold temperature of 80℃-100℃, pressure control refers to the injection pressure between 50MPa-100MPa, and the holding time is between 10s-20s. Injection speed control refers to the fast injection stage and the medium speed injection stage. The maximum injection speed of the injection molding machine is 150 ml per second and 100 ml per second.

[0017] Compared with the prior art, the beneficial effects are:

[0018] (1) The light guide module of the present invention causes the light of the light emitting device to be totally reflected on the light guide surface and the horizontal platform surface, and the focusing structure of the first light guide substrate can gradually reduce the incident angle of the light so that it can enter the second light guide substrate for total reflection, thereby reducing the attenuation of the light caused by emitting from unnecessary surfaces of the first light guide substrate and the second light guide substrate during the propagation process, thereby improving the utilization efficiency of the light and the stability of the light propagation;

[0019] (2) The present invention separates two adjacent light-guiding surfaces by a horizontal platform. Since the light-emitting device is mounted on the substrate while being fixed to the substrate, the distance and angle between the light-emitting device and the first light-guiding substrate can be controlled, thereby improving the light incident efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of an implementation mode in which the light guide surface of the present invention is a plane;

[0021] Figure 2 is a schematic diagram of another embodiment of the present invention in which the light guide surface is a plane;

[0022] Figure 3 It is a schematic diagram of an implementation method in which the light-guiding surface of the present invention is a free-form surface;

[0023] Figure 4is a schematic diagram of another implementation mode in which the light guiding surface is a free-form surface in the present invention;

[0024] Figure 5 It is a schematic diagram of an implementation method in which the light guiding surface of the present invention is a combination of a plane and a free-form surface;

[0025] Figure 6 is a schematic diagram of an optical path in an embodiment of the present invention;

[0026] Figure 7 It is a schematic diagram of the use status of an implementation mode of the present invention.

[0027] Figure numerals: 1, substrate; 2, light-emitting device; 3, first light-guiding matrix; 4, second light-guiding matrix; 5, light-guiding surface; 6, horizontal surface; 7, coating layer; 8, adhesive layer; 9, first surface; 10, second surface; 11, first film layer; 12, second film layer. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] A composite light guide module comprises a first light guide matrix 3 at the upper end and a second light guide matrix 4 at the lower end, the refractive index of the first light guide matrix 3 and the refractive index of the second light guide matrix 4 are both greater than the refractive index of air, preferably the refractive index n1 of the first light guide matrix 3 is greater than the refractive index n2 of the second light guide matrix 4, preferably the material of the first light guide matrix 3 and the second light guide matrix 4 is one of transparent PC, acrylic board, resin, glass or crystal or other transparent polymer materials, and the total height of the first light guide matrix 3 is 1 to 10 mm.

[0030] The rear end of the first light-guiding substrate 3 is provided with a first surface 9 at a certain angle to the horizontal surface layer, preferably a vertical angle, and the vertical length of the first surface 9 is H. Preferably, a coating layer 7 or a second surface 10 microstructure layer is provided on the first surface 9, and the coating layer 7 is a single layer or a multilayer, and each coating layer has different functions, such as anti-oxidation, heat insulation, UV resistance, anti-reflection, anti-reflection and other functions to improve the quality of the light-guiding module, so that the functions of the light-guiding module are more diversified. The total thickness of the multilayer coating is 0.001um-10um, and the coating layer 7 can be processed on the surface of the first light-guiding substrate 3 by any of evaporation coating, magnetron sputtering coating, electroplating or other coating methods.

[0031] A horizontal second surface 10 is provided at the lower end of the first light guide substrate 3, and the lateral length of the second surface 10 is L. The upper end of the first light guide substrate 3 is connected to the front end of the second surface 10 through a reflective surface inclined forward and downward, and the reflective surface is mainly composed of at least one section of a light guide surface 5 inclined downward connected to at least one section of a horizontal horizontal platform 6. Specifically, the number of the light guide surface 5 is one, the number of the horizontal platform is one, the horizontal platform is located at the upper end of the first light guide substrate 3, the rear end of the horizontal platform is connected to the upper end of the first surface 9, the upper end of the light guide surface 5 is connected to the front end of the horizontal platform, and the lower end of the light guide surface 5 is inclined forward and extends to connect the front end of the second surface 10;

[0032] Alternatively, the number of the light-guiding surfaces 5 is at least two, the number of the horizontal surfaces 6 is at least two, and the number of the light-guiding surfaces 5 is consistent with the number of the horizontal surfaces 6, one of the light-guiding surfaces 5 is located at the front end, and then connected to a plurality of horizontal surfaces 6 and a plurality of light-guiding surfaces 5 that are sequentially staggered and connected, the lower end of the light-guiding surface 5 located at the front end is connected to the front end of the second horizontal surface 6, the rear end of the horizontal surface 6 located at the rear end is connected to the upper end of the first surface 9, the front end of the horizontal surface 6 located in the middle part is connected to the upper end of the front light-guiding surface 5, and the rear end of the horizontal surface 6 located in the middle part is connected to the lower end of the rear light-guiding surface 5;

[0033] Alternatively, the number of the light-guiding surfaces 5 is at least two, the number of the horizontal surfaces 6 is at least one, and the number of the horizontal surfaces 6 is one less than the light-guiding surfaces 5, and at least two light-guiding surfaces 5 are arranged in sequence from front to back, the lower end of the light-guiding surface 5 located at the front end is connected to the front end of the second surface 10, and the upper end of the light-guiding surface 5 located at the rear end is connected to the upper end of the first surface 9, and at least one horizontal surface 6 is respectively arranged between every two adjacent light-guiding surfaces 5, the front end of the horizontal surface 6 is connected to the upper end of the front light-guiding surface 5, and the rear end of the horizontal surface 6 is connected to the lower end of the rear light-guiding surface 5.

[0034] Preferably, the light guiding surface 5 is a plane or a free-form surface, and the inclined surface lengths of the plurality of light guiding surfaces 5 distributed sequentially from the back to the front are L1, L2, L3, ..., L n The vertical heights of the plurality of light guide surfaces 5 are H1, H2, H3, ... H n , and the acute angles between the plurality of light guide surfaces 5 and the second surface 10 are θ1, θ2, θ3, ... θ n, the aforementioned subscript n represents the number of light-guiding surfaces 5, and the light-guiding surfaces 5 are used for the total reflection of the light transmission in the first light-guiding matrix 3. Preferably, the upper end surface of the first light-guiding matrix 3 and the light-guiding surface 5 are both covered with a first film layer 11 with high reflectivity, or the light-guiding surface 5 is provided with a first surface 9 microstructure layer to improve the total reflection performance and increase the efficiency of light guiding. The material of the first film layer 11 is such as oxide crystals or polymers. The light-guiding surface can also be selected to increase the surface properties by lamination, coating and other processes. The optical goals including anti-reflection, anti-reflection, deflection, shaping and other functions can be achieved through the microstructure layer, wherein the main steps of processing the microstructure layer onto the surface of the light-guiding surface include: S1. Using any one of laser direct engraving, chemical corrosion, CNC processing, and photolithography technology to process a number of microstructures on the mold; S2. Using any one of UV transfer technology, extrusion molding, hot pressing molding and printing technology to copy the microstructure on the mold on the light-guiding surface.

[0035] Preferably, two adjacent inclined light-guiding surfaces 5 are connected by a horizontally arranged horizontal surface 6, the rear end of the horizontal surface 6 is connected to the lower end of the rear light-guiding surface 5, and the front end of the horizontal surface 6 is connected to the upper end of the front light-guiding surface 5. Furthermore, a second film layer 12 with high reflectivity is adhered to the horizontal surface 6, or a second surface 10 microstructure layer is provided on the horizontal surface 6 to improve the total reflection performance and increase the light guiding efficiency. The material of the first film layer 11 is such as oxide crystals or polymers.

[0036] The second light guide substrate 4 is arranged in a rectangular parallelepiped shape, and the upper end surface of the second light guide substrate 4 is connected to the second surface 10. Preferably, the upper end of the second light guide substrate 4 is connected to the lower end of the first light guide substrate 3 by gluing with a transparent adhesive. The transparent adhesive is preferably PVB adhesive, UV adhesive, OCA adhesive or other transparent adhesives. Specifically, a transparent adhesive that is liquid at room temperature can be applied to the upper end surface of the second light guide substrate 4, and then the second surface 10 of the first light guide substrate 3 is attached to the upper end of the second light guide substrate 4. The second light guide substrate 4 is installed on the first light guide substrate 3 by gluing. The obtained structure is detachable. For the installed structure, secondary transformation can be achieved without disassembly, thereby reducing the transformation cost. For example, if the second light guide matrix 4 needs to be secondary transformed to change the light conductivity, it is only necessary to disassemble the first light guide matrix 3 and replace it, which is convenient for later maintenance and greatly reduces the maintenance cost. The light guide module can be installed and used without disassembling the second light guide matrix 4. Similarly, the light guide module can be removed without disassembling the second light guide matrix 4, thereby saving the transformation cost. In addition, the light guide module body is small and will not block the second light guide matrix 4. The second light guide matrix 4 is transparent when not lit.

[0037] The aforementioned first surface 9 microstructure layer and the second surface 10 microstructure layer are both microlens array layers.

[0038] During installation and use, the composite light guide module of the present invention is fixed on the mounting substrate, and an adhesive layer 8 for fixing and mounting the composite light guide module is provided on any one or more horizontal surfaces 6. The adhesive layer 8 uses a highly reliable material, such as double-sided adhesive, PVB adhesive, UV adhesive, OCA adhesive or other transparent adhesives. The split design of the first substrate and the circuit board 1 makes installation and disassembly simple, and is convenient for later maintenance. The adhesive layer 8 is glued and connected to the mounting substrate for fixing, and after fixing, the upper end face of the first light guide substrate 3 is attached to the surface of the mounting substrate, so that the light directed to the upper end face of the first light guide substrate 3 can be reflected by a mirror image, thereby preventing the light from being emitted from the upper end face of the first light guide substrate 3. A light-emitting device 2 is installed on the mounting substrate, and the light-emitting device 2 is located behind the composite light guide module of the present invention, corresponding to the first light guide substrate 3.

[0039] The light emitted by the light emitting device 2 passes through a focusing cover toward the first surface 9 and forms a certain incident angle θ with the first surface 9. c Injected into the first light guide matrix 3, θ c is greater than or equal to the critical angle of total reflection between the first light guide matrix 3 and the external air, so that the light is totally reflected on the surface of the light guide surface 5, and after total reflection, it is incident at an angle θ with the second surface 10 D The light is emitted into the second light guide matrix 4 through the first light guide matrix 3 , undergoes stable total reflection in the second light guide matrix 4 , and finally is emitted from the front end surface of the second light guide matrix 4 .

[0040] Among them, n1, n2, L n , H n ,θ n The following conditions must be met:

[0041]

[0042]

[0043] The angle θ1 must satisfy the requirement that the incident light is totally reflected when it reaches the first light-guiding surface 5. When the angle θ1 is n=1, the angle between the first light-guiding surface 5 and the second surface 10 is

[0044]

[0045] The angle θ2 must satisfy the requirement that the light is totally reflected when it reaches the second light-guiding surface 5 after being reflected by the first light-guiding surface 5. When the angle θ2 is n=2, the angle between the second light-guiding surface 5 and the second surface 10 is

[0046]

[0047] Angle θ n It is required that the light is totally reflected when it reaches the nth light guiding surface 5 after being reflected by a plurality of light guiding surfaces 5 , where n>2.

[0048] After the above conditions are met, the angle θ c The light incident into the first light guide matrix 3 undergoes continuous total reflection in the first light guide matrix 3 and is reflected at an angle θ D The light is incident into the second light guide matrix 4 , undergoes continuous total reflection on the upper end surface and the lower end surface of the second light guide matrix 4 , and then is emitted from the front end surface of the second light guide matrix 4 .

[0049] In this way, the attenuation of light caused by emitting from unnecessary surfaces of the first light guide substrate 3 and the second light guide substrate 4 during the propagation process is reduced, thereby improving the utilization efficiency of the light.

[0050] According to a preferred technical solution, the composite light guide module also includes a horizontally arranged substrate 1, which is a circuit board used to fix the light-emitting device 2 and transmit the circuit. The preferred circuit board is made of conductive and durable materials, such as a PCB board or an FPC board. The substrate 1 is located above the first light guide matrix 3, and the first light guide matrix 3 is fixedly installed on the lower surface of the substrate 1. The first light guide matrix 3 is installed on the substrate 1 by gluing. A light source installation position is also provided on the lower surface of the substrate 1 behind the first light guide matrix 3 for installing the light-emitting device 2. The preferred light-emitting device 2 is LED, LD or OLED. The light-emitting device 2 is tightly attached to the circuit board through a transparent adhesive and is at a certain angle and distance from the first light guide matrix 3. The split design of the first matrix and the substrate 1 makes installation and disassembly simple and convenient for later maintenance.

[0051] In a preferred technical solution, the molding process of the first light guide substrate 3 includes two steps: mold making and injection molding;

[0052] The production of molds includes: design, production, and debugging. The design stage mainly determines the structure, form, and material of the mold according to the geometric shape, size, and requirements of the product, and draws the mold drawings; the production stage mainly selects suitable steel materials for cutting, processing, and assembly according to the mold drawings to produce the mold; the debugging stage mainly debugs the manufactured mold to make it reach the best state;

[0053] Injection molding mainly includes six stages: mold closing, filling, holding pressure, cooling, mold opening and demolding. These six stages are a complete continuous process. The main control parameters of the four stages of filling, holding pressure, cooling and demolding are: temperature control, pressure control and injection speed control. Temperature control refers to barrel temperature control and mold temperature control. The temperature of the front zone is 250℃-270℃, the temperature of the middle zone is 270℃-290℃, and the temperature of the rear zone is 280℃-300℃; mold temperature control refers to the mold temperature of 80℃-100℃, pressure control refers to the injection pressure between 50MPa-100MPa, and the holding time is between 10s-20s. Injection speed control refers to the fast injection stage and the medium speed injection stage. The maximum injection speed of the injection molding machine is 150 ml per second and 100 ml per second.

[0054] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 a limitation on the present invention.

[0055] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0056] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

Claims

1. A composite light guide module, characterized in that: The invention comprises a first light-guiding substrate (3) located at the upper end and a second light-guiding substrate (4) located at the lower end, the refractive index of the first light-guiding substrate (3) and the refractive index of the second light-guiding substrate (4) both being greater than the refractive index of air, the rear end of the first light-guiding substrate (3) being provided with a first surface (9) which is at a certain angle to the horizontal plane, the lower end of the first light-guiding substrate (3) being provided with a horizontal second surface (10), the upper end of the first light-guiding substrate (3) being connected to the front end of the second surface (10) via a reflective surface which is inclined forward and downward, the reflective surface mainly being composed of a plurality of light-guiding surfaces (5) inclined downward connected to a horizontal horizontal surface (6), the second light-guiding substrate (4) being arranged in a rectangular parallelepiped shape, the upper end surface of the second light-guiding substrate (4) being in close contact with the second surface (10); The refractive index of the first light guide matrix (3) and the refractive index of the second light guide matrix (4) are set to be n1 and n2 respectively, and the inclined surface lengths of the plurality of light guide surfaces (5) distributed sequentially from back to front are sequentially L1, L2, L3, ... L n The multiple light guide surfaces (5) are arranged at vertical heights H1, H2, H3, ... H n , and the acute angles between the plurality of light-guiding surfaces (5) and the second surface (10) are θ1, θ2, θ3, ... θ n ; The above n1, n2, L n , H n ,θ n The following conditions must be met:

2. The composite light guide module according to claim 1, characterized in that: The first surface (9) is provided with a coating layer (7), the coating layer (7) is a single layer or multiple layers, each coating layer (7) has different functions, including anti-oxidation, heat insulation, anti-ultraviolet, anti-reflection and anti-reflection.

3. The composite light guide module according to claim 1, characterized in that: A first film layer (11) with high reflectivity is adhered to both the light-guiding surface (5) and the horizontal platform surface (6) of the first light-guiding substrate (3).

4. The composite light guide module according to claim 1, characterized in that: The number of the light-guiding surfaces (5) is at least two, the number of the horizontal surfaces (6) is at least two, and the number of the light-guiding surfaces (5) is consistent with the number of the horizontal surfaces (6), one of the light-guiding surfaces (5) is located at the front end, and then connected to a plurality of horizontal surfaces (6) and a plurality of light-guiding surfaces (5) which are connected in sequence and staggered, the lower end of the light-guiding surface (5) located at the front end is connected to the front end of the second horizontal surface (6), the rear end of the horizontal surface (6) located at the rear end is connected to the upper end of the first surface (9), the front end of the horizontal surface (6) located in the middle part is connected to the upper end of the front light-guiding surface (5), and the rear end of the horizontal surface (6) located in the middle part is connected to the lower end of the rear light-guiding surface (5).

5. The composite light guide module according to claim 1, characterized in that: The number of the light-guiding surfaces (5) is at least two, the number of the horizontal surface (6) is at least one, and the number of the horizontal surface (6) is one less than the number of the light-guiding surfaces (5), the at least two light-guiding surfaces (5) are arranged in sequence from front to back, the lower end of the light-guiding surface (5) located at the front end is connected to the front end of the second surface (10), the upper end of the light-guiding surface (5) located at the rear end is connected to the upper end of the first surface (9), at least one horizontal surface (6) is respectively arranged between every two adjacent light-guiding surfaces (5), the front end of the horizontal surface (6) is connected to the upper end of the front light-guiding surface (5), and the rear end of the horizontal surface (6) is connected to the lower end of the rear light-guiding surface (5).

6. The composite light guide module according to claim 1, characterized in that: An adhesive layer (8) for fixing and installing the composite light guide module is provided on any one or more horizontal surfaces (6).

7. The composite light guide module according to claim 1, characterized in that: The composite light guide module further comprises a horizontally arranged substrate (1), wherein the substrate (1) is located above a first light guide matrix (3), wherein the first light guide matrix (3) is fixedly mounted on the lower surface of the substrate (1), and a light source mounting position is also provided on the lower surface of the substrate (1) behind the first light guide matrix (3) for mounting the light emitting device (2).

8. The composite light guide module according to claim 1, wherein: The molding process of the first light guide substrate (3) comprises two steps of mold making and injection molding; The production of molds includes: design, production, and debugging. The design stage mainly determines the structure, form, and material of the mold according to the geometric shape, size, and requirements of the product, and draws the mold drawings; the production stage mainly selects suitable steel materials for cutting, processing, and assembly according to the mold drawings to produce the mold; the debugging stage mainly debugs the manufactured mold to make it reach the best state; Injection molding mainly includes six stages: mold closing, filling, holding pressure, cooling, mold opening and demolding. These six stages are a complete continuous process. The main control parameters of the four stages of filling, holding pressure, cooling and demolding are: temperature control, pressure control and injection speed control. Temperature control refers to barrel temperature control and mold temperature control. The temperature of the front zone is 250℃-270℃, the temperature of the middle zone is 270℃-290℃, and the temperature of the rear zone is 280℃-300℃; mold temperature control refers to the mold temperature of 80℃-100℃, pressure control refers to the injection pressure between 50MPa-100MPa, and the holding time is between 10s-20s. Injection speed control refers to the fast injection stage and the medium speed injection stage. The maximum injection speed of the injection molding machine is 150 ml per second and 100 ml per second.

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