Light guide piece, design method thereof and indicator lamp

Abstract

The invention discloses a light guide piece and a design method thereof and an indicator lamp, and relates to the technical field of indicator lamps, the light guide piece comprises a light incoming portion, a connecting portion and a light outgoing portion, the two sides, oppositely arranged in the Y-axis direction, of the connecting portion are connected with the light incoming portion and the light outgoing portion respectively, and a light outgoing face is formed on the side, away from the light incoming portion, of the light outgoing portion; a light incident surface and a reflecting surface are formed on the light incident part, and the light incident surface is arranged towards the light emergent side of the light source piece; the reflecting surface is inclined towards the direction close to the connecting part, an included angle is formed between the reflecting surface and the light incident surface, the reflecting surface can totally reflect light rays emitted from the light incident surface to the reflecting surface, and the light rays reflected by the reflecting surface can penetrate through the connecting part and then are emitted from the light emergent surface.

Description

Technical Field

[0001] The present invention relates to the technical field of indicator lights, and in particular to a light guide component and a design method thereof, and an indicator light. Background Art

[0002] With the development of smart technology products and wireless technology, more portable electronic products have appeared on the market. With the popularity of this type of product, consumers have higher and higher requirements for the appearance, functionality and portability of portable products.

[0003] The indicator light of portable electronic products is an indispensable part of the product. As an indicator of the product function, it is necessary not only to have uniform illumination on the light-emitting surface of the product, but also to have the light-emitting surface be bright enough to satisfy the indication of product-related information. Under the same light source parameters, the larger the size of the light guide, the more light source energy can be converged, the higher the light guide efficiency, and the higher the final product brightness. However, with the increasing demand for portable products, the product development trend is miniaturization and portability. Under this trend, the space of the optical light guide structure will inevitably be compressed, and the size of the light guide will inevitably shrink accordingly, resulting in lower optical efficiency and making the final indicator light of the product dimmer. Summary of the invention

[0004] The main purpose of the present invention is to provide a light guide and a design method thereof, and an indicator light, in order to solve the problem of how to reduce the size of the light guide without affecting the optical efficiency.

[0005] To achieve the above-mentioned purpose, the present invention provides a light guide, which includes a light incident portion, a connecting portion and a light emitting portion, wherein two sides of the connecting portion are relatively arranged along the Y-axis direction and are respectively connected to the light incident portion and the light emitting portion, and a light emitting surface is formed on the side of the light emitting portion away from the light incident portion, and the light incident portion is formed with a light incident surface and a reflecting surface, and the light incident surface and the light source component are arranged in sequence along the Z-axis direction, and the light incident surface is arranged toward the light emitting side of the light source component, and the Z-axis is perpendicular to the Y-axis; the reflecting surface is inclined in a direction close to the connecting portion and is arranged at an angle to the light incident surface, and the reflecting surface can totally reflect the light emitted from the light incident surface to the reflecting surface, and the light reflected by the reflecting surface can pass through the connecting portion and be emitted from the light emitting surface.

[0006] The present invention further provides an indicator light, which includes a light source component, a substrate and the above-mentioned light guide component, wherein the light source component and the connecting portion are both connected to the substrate.

[0007] The present invention further proposes a design method for a light guide, the light guide comprising a light input portion, a connecting portion and a light output portion, the connecting portion having two opposite sides arranged along the Y-axis direction connected to the light input portion and the light output portion respectively, a light output surface is formed on a side of the light output portion away from the light input portion, the light input portion comprises a light input surface and a reflection surface, the reflection surface is arranged obliquely in a direction close to the connecting portion and is arranged at an angle to the light input surface; the design method for the light guide comprises the following steps:

[0008] Acquiring a critical angle value according to material information of the light guide;

[0009] Obtaining a turning angle range according to the critical angle value;

[0010] Determining whether the preset turning angle is within the turning angle range;

[0011] If the preset turning angle is within the turning angle range, obtaining a value of an angle between the light incident surface and the reflecting surface according to the preset turning angle;

[0012] Acquire profile information of the main optical axis of the light guide according to the angle value;

[0013] The shape information of the light guide is acquired according to the contour information. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0015] Figure 1 A schematic structural diagram of an embodiment of a light guide provided by the present invention;

[0016] Figure 2 A schematic structural diagram of another embodiment of the light guide provided by the present invention;

[0017] Figure 3 A schematic diagram of the structure of an indicator light embodiment provided by the present invention;

[0018] Figure 4 for Figure 2 a right side view of the light guide;

[0019] Figure 5 A schematic diagram of the three-dimensional structure of an embodiment of a light guide member provided by the present invention;

[0020] Figure 6A schematic diagram of the optical path of the light guide provided by the present invention;

[0021] Figure 7 A schematic diagram of the illumination of the light emitting surface of the light guide provided by the present invention;

[0022] Figure 8 A schematic flow chart of a first embodiment of a method for designing a light guide provided by the present invention;

[0023] Fig. 9 This is a schematic flow chart of a second embodiment of the method for designing a light guide provided by the present invention.

[0024] Description of Figure Numbers:

[0025] 100, light guide; 1, light incident portion; 11, light incident surface; 12, reflecting surface; 121, first surface; 122, second surface; 1221, reflecting curved surface; 2, connecting portion; 3, light emitting portion; 31, light emitting surface; 4, incident curved portion; 41, light incident curved surface;

[0026] 200, indicator light; 210, light source component; 220, substrate.

[0027] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] With the development of smart technology products and wireless technology, more portable electronic products have appeared on the market. With the popularity of this type of product, consumers have higher and higher requirements for the appearance, functionality and portability of portable products.

[0032] The indicator light of portable electronic products is an indispensable part of the product. As an indicator of the product function, it is necessary not only to have uniform illumination on the light-emitting surface of the product, but also to have the light-emitting surface be bright enough to satisfy the indication of product-related information. Under the same light source parameters, the larger the size of the light guide, the more light source energy can be converged, the higher the light guide efficiency, and the higher the final product brightness. However, with the increasing demand for portable products, the product development trend is miniaturization and portability. Under this trend, the space of the optical light guide structure will inevitably be compressed, and the size of the light guide will inevitably shrink accordingly, resulting in lower optical efficiency and making the final indicator light of the product dimmer.

[0033] The inventors have found through research that existing light-concentrating transmission solutions such as TIR (total internal reflection) solutions and optical fiber transmission solutions have the problem of being unable to effectively adapt to smaller installation space requirements or having low light efficiency.

[0034] The present invention provides a light guide member, aiming to solve the technical problem of how to improve the light effect of an indicator light of an electronic device under the condition of limited installation space.

[0035] See also Figure 1 and Figure 3In one embodiment of the present invention, the light guide 100 includes a light incident portion 1, a connecting portion 2 and a light emitting portion 3. The connecting portion 2 is respectively connected to the light incident portion 1 and the light emitting portion 3 on two sides that are opposite to each other along the Y-axis direction. A light emitting surface 31 is formed on the side of the light emitting portion 3 away from the light incident portion 1. The light incident portion 1 is formed with a light incident surface 11 and a reflecting surface 12. The light incident surface 11 and the light source component 210 are arranged in sequence along the Z-axis direction, and the light incident surface 11 is arranged toward the light emitting side of the light source component 210, and the Z-axis is perpendicular to the Y-axis; the reflecting surface 12 is inclined in a direction close to the connecting portion 2 and is arranged at an angle to the light incident surface 11. The reflecting surface 12 can totally reflect the light emitted from the light incident surface 11 to the reflecting surface 12, and the light reflected by the reflecting surface 12 can pass through the connecting portion 2 and be emitted from the light emitting surface 31.

[0036] The technical solution of the present invention receives the light emitted by the light source 210 through the light incident surface 11. The light passes through the light incident surface 11 and is emitted to the reflecting surface 12. The reflecting surface 12 can fully reflect the light. The light after total reflection passes through the connecting part 2 and is emitted from the light emitting surface 31 of the light emitting part 3. The reflecting surface 12 fully reflects the light, thereby changing the propagation direction of the light, and realizing the deflection of the light emitted by the light source 210. The deflection angle of the light guide 100 can be designed and adjusted according to actual needs, and the deflection angle of the light guide 100 can be realized from a smaller angle to a design range of nearly 180°, so that the light guide 100 has higher compatibility. The light guide 100 is compatible with almost all the deflecting light guide indicator light 200 structures on the market that have requirements for spatial structure; and because the reflecting surface 12 fully reflects the light, the light loss is reduced, and the light efficiency of the light emitting surface 31 is improved, so that under the condition of the same light source illumination of the light source 210 Under the present embodiment, the area that can be illuminated by the indicator light 200 of the light guide 100 is brighter; compared with the traditional solution of spraying reflective white oil on the surface of the light guide element structure to improve the light guiding efficiency, since the light guide 100 realizes the deflection of light through pure optical design, the process of spraying reflective white oil is omitted, the production process of the product is reduced, and the production cost of the product is reduced; and, compared with the traditional optical fiber transmission solution, since the light guide 100 of the present embodiment realizes the deflection of light through pure optical design, the size of the light guide 100 can be compressed to a smaller range, which helps to reduce the size of the product using the light guide 100 and meet the requirements of product portability and miniaturization; and since the size of the light guide 100 can be designed to be smaller, the space it occupies is also smaller, which reserves more sufficient design space for other components of the product, thereby effectively reducing the difficulty of product design and layout. It should be noted that the emitted light of the light source 210 of the present embodiment is directly directed to the light incident surface 11 of the light guide 100, that is, the light source 210 uses a direct light emission solution to light up the indicator light 200, which solves the problem that the existing products are limited by product ideas, the internal spatial structure of the product, and the hardware PCB layout, and cannot use a direct light emission solution to light up the product indicator light 200. It should also be noted that the light incident surface 11 is a plane, and the optical axis of the light source 210 is perpendicular to the light incident surface 11 or is in a substantially perpendicular state. The light emitted by the light source 210 passes through the light incident surface 11 and is totally reflected by the reflective surface 12 toward the light emitting portion 3. The side wall of the light emitting portion 3 can also totally reflect the light, thereby directing the light to the light emitting surface 31, thereby improving the light efficiency of the light emitting surface 31; wherein the light emitting portion 3 can be a cone, a cylinder, a cube, or a rectangular parallelepiped structure, which is not limited here.The product may be an earphone box, that is, the light guide 100 may be used as the light guide 100 of the earphone box indicator light 200; the product may also be other electronic devices, that is, the light guide 100 may be used as the light guide 100 of the indicator light 200 of other electronic products.

[0037] See also Figures 2 to 4 In one embodiment, the light guide 100 further includes an incident curved surface portion 4, which is disposed on the light incident surface 11. The incident curved surface portion 4 protrudes toward the direction close to the light source 210 to form a light incident curved surface 41, and the light incident curved surface 41 is used to converge the light emitted by the light source 210. The inventor has found through research that, in the light incident surface 11 without the incident curved surface portion 4, only a small amount of light in the central area of ​​the main optical axis can be emitted from the light exit surface 31 of the light guide 100, so the light efficiency is low. In this embodiment, the incident curved surface portion 4 is disposed on the light incident surface 11, so that the light incident curved surface 41 is disposed toward the light exit side of the light source 210. Since the light incident curved surface 41 protrudes toward the direction where the light source 210 is located, the light incident curved surface 41 has a convergence effect on the light emitted by the light source 210, so that more light is emitted from the light exit surface 31, thereby improving the light efficiency. It should be noted that the light source element 210 is a Lambert scatterer, where Lambert scattering is a common light scattering model used to describe the diffuse reflection behavior of light on a rough surface. In this model, the intensity of the reflected light is independent of the viewing direction, but is related to the direction of the incident light. Specifically, the intensity of Lambert scattering follows Lambert's cosine law, that is, the intensity of the reflected light is proportional to the cosine of the angle between the incident light and the surface normal. It should also be noted that the surface shape of the light incident surface 41 can be Fresnelized, so that the light incident surface 41 has a stronger convergence on the light, and the light efficiency of the light emitting surface 31 is further improved; wherein, the Fresnelization treatment is based on the Fresnel diffraction principle, and the phase change and amplitude attenuation of the light wave during the propagation process are simulated by numerical calculation, thereby realizing the recovery and processing of the image or signal.

[0038] See also Figure 3 and Figure 5 In one embodiment, the light incident curved surface 41 is eccentrically arranged relative to the optical axis of the light source component 210, so as to converge the light emitted by the light source component 210 to improve the light efficiency of the light emitting surface 31. By eccentrically arranging the light incident curved surface 41 relative to the optical axis of the light source component 210, the light efficiency of the light emitting surface 31 can be adjusted by adjusting the eccentricity of the light incident curved surface 41, thereby helping to further improve the light efficiency of the light emitting surface 31. It should be noted that the light incident curved surface 41 is optimized for eccentricity in the negative direction of the Y axis, so as to improve the light focusing ability of the light incident curved surface 41. In addition, the light incident curved surface 41 can be optimized for positive eccentricity in the X axis, negative eccentricity in the X axis, and positive eccentricity in the Y axis. The optimization direction can be single or multi-dimensional, and there is no limitation here. By optimizing the eccentricity of the light incident curved surface 41, the light can be proportionally constrained as required to improve the light efficiency.

[0039] See also Figures 2 to 5 In one embodiment, the reflecting surface 12 includes a first surface 121 and a second surface 122, one end of the first surface 121 is connected to the light incident surface 11 and is set at an angle to the light incident surface 11, the other end of the first surface 121 is connected to the second surface 122, and the second surface 122 protrudes in a direction away from the light incident surface 11 to form a reflecting curved surface 1221, and the reflecting curved surface 1221 can totally reflect the light emitted from the light emitting surface 31 and converge the light emitted from the light emitting surface 31, so that the light reflected by the reflecting curved surface 1221 can converge to the light emitting surface 31. The inventors have found that in order to compress the product structure, the distance from the light incident surface 11 to the light source 210 is very small, which means that even if the light incident curved surface 41 is provided, its ability to converge light is still limited. Therefore, this embodiment additionally provides a reflective curved surface 1221 on this basis, and further converges part of the light emitted from the light incident surface 11 by relying on the reflective curved surface 1221, so that more of the converged light is totally reflected and irradiated toward the light emitting surface 31 in a converging manner, further improving the light efficiency of the light emitting surface 31, that is, under the condition of the same light source illumination, the indicator light 200 formed by the light guide 100 of this embodiment illuminates a brighter area and has better uniformity than the traditional indicator light 200. It should be noted that the first surface 121 can also totally reflect the light emitted from the light emitting surface 31, so that the reflected light can be emitted from the light emitting surface 31, thereby improving the light efficiency.

[0040] In one embodiment, the reflective surface 1221 is a gradient surface; wherein, the curvature of the reflective surface 1221 is not fixed, and therefore the reflective surface 1221 is a gradient surface, and by adjusting the curvature of different areas of the gradient surface, the ability of the gradient surface to converge light is improved, so that more light can be emitted from the light-emitting surface 31, thereby improving the light efficiency of the light-emitting surface 31.

[0041] In one embodiment, the reflective surface 1221 is eccentrically arranged relative to the optical axis of the light source 210, and is used to converge the light incident on the reflective surface 1221 to improve the light efficiency of the light emitting surface 31; the inventors have found that since the reflective surface 1221 is added on the basis of the light incident surface 41, the light will cause the light path to deviate due to the difference in curvature between the two. Therefore, when the eccentricity of the light incident surface 41 is adjusted, the eccentricity of the reflective surface 1221 also needs to be adjusted. That is, after the eccentricity of the light incident surface 41 is adjusted, the convergence angle of the light beam will change. In order to make the light more convergent and thus improve the light efficiency, this embodiment optimizes and adjusts the eccentricity of the reflective surface 1221, thereby converging the divergent light, for example, converging toward the X-axis and the Y-axis, and finally the light is emitted from the light emitting surface 31, thereby improving the light efficiency. It should be noted that after adjusting the curvature and eccentricity of the light incident surface 41 and the reflection surface 1221, if the lighting effect still does not meet the requirements, the curvature and eccentricity of the light incident surface 41 and the reflection surface 1221 can be repeatedly adjusted so that the lighting effect can be optimized or meet the requirements.

[0042] According to an embodiment of the present invention, the reflective curved surface 1221 is coated with an anti-reflection film in the visible light band, so that more light is totally reflected from the reflective curved surface 1221, thereby improving the light efficiency. The light incident curved surface 41 is coated with an anti-reflection film in the visible light band, so that more light can pass through the light incident curved surface 41, thereby improving the light efficiency.

[0043] In one embodiment, the number of incident curved surface portions 4 is multiple, and the number of incident curved surface portions 4 and the number of light source components 210 are consistent and are arranged one-to-one, and the number of reflective curved surfaces 1221 and the incident curved surface portions 4 are consistent and are arranged one-to-one. By providing multiple light source components 210, and arranging the incident curved surface portions 4 and the light source components 210 one-to-one, and the reflective curved surfaces 1221 are also arranged one-to-one with the incident curved surfaces, the light effect is improved. Among them, the light source components 210 can be arranged in an array or scattered, and the specific layout method can be adjusted according to needs, and is not limited here.

[0044] See also Figure 1 and Figure 5 In one embodiment, the light guide 100 is an injection molded part. Compared with a light guide 100 formed by combining multiple parts, the light guide 100 of this embodiment omits the assembly process of multiple parts, thereby being easy to produce and assemble.

[0045] See also Figure 3 In one embodiment, the optical axis of the light source 210 is perpendicular to the optical axis of the light emitting surface 31. This embodiment can realize 90° deflection of light, thereby providing a better implementation basis for making the light guide 100 and the product smaller.

[0046] See also Figure 3 The present invention also proposes an indicator light 200, which includes a light source 210, a substrate 220 and the above-mentioned light guide 100, and the light source 210 and the connecting portion 2 are both connected to the substrate 220. The indicator light 200 can be used as an indicator light 200 on an earphone box, as an indicator light 200 of earphones, or as an indicator light 200 of other electronic products, without limitation. Since the indicator light 200 adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0047] See also Figure 8 , Figure 8 The present invention is a flow chart of a first embodiment of a method for designing a light guide provided by the present invention. The present invention further provides a method for designing a light guide, wherein the light guide comprises a light input portion, a connecting portion and a light output portion, wherein two sides of the connecting portion are arranged opposite to each other along the Y-axis direction and are respectively connected to the light input portion and the light output portion, a light output surface is formed on a side of the light output portion away from the light input portion, the light input portion comprises a light input surface and a reflecting surface, the reflecting surface is arranged obliquely in a direction close to the connecting portion and is arranged at an angle to the light input surface; the method for designing a light guide comprises the following steps:

[0048] S100, obtaining a critical angle value according to material information of the light guide;

[0049] The material of the light guide can be PC (Polycarbonate), PMMA (PolymericMethyl Methacrylate) and silicone material. According to the formula θ=arccos1 / n, n is the refractive index of the material, and θ is the critical angle value corresponding to the material. Taking PC material as an example, θ is 42°.

[0050] S200, obtaining a turning angle range according to the critical angle value;

[0051] According to the critical angle value, the range of the folding angle that the material can correspond to can be calculated. Taking PC material as an example, its folding angle range is greater than or equal to 84° and less than 180°. Therefore, this solution can meet the design of larger folding angles.

[0052] S300, determining whether the preset turning angle is within the turning angle range;

[0053] It is determined whether the preset folding angle is within the folding angle range, so as to determine whether the material can achieve the folding angle. If it is not within the folding angle range, the folding angle range can be changed by changing the material type.

[0054] S310, if the preset turning angle is within the turning angle range, obtaining a value of an angle between the light incident surface and the reflecting surface according to the preset turning angle;

[0055] If the preset turning angle is within the turning angle range, it means that the material can meet the preset turning angle. Therefore, the material can be used as the material of the light guide. Taking the preset turning angle of 90° as an example, the angle between the light incident surface and the reflection surface can be calculated to be α according to the preset turning angle, and α=45°.

[0056] S400, acquiring profile information of a main optical axis of the light guide according to the angle value;

[0057] During the design stage, the outgoing light ray can be drawn vertically from the center of the light emitting surface of the light source. After passing through the light incident surface, the ray is emitted to the reflecting surface, and then is emitted to the light emitting surface under total reflection from the reflecting surface, and finally is emitted from the light emitting surface. When the angles between the light incident surface and the reflecting surface are determined, the main optical axis of the product can be determined according to the optical path, and then the contour information of the main optical axis can be determined.

[0058] S500: Acquire shape information of the light guide according to the contour information.

[0059] The product size can be further determined based on the profile information of the main optical axis. Taking α=45° as an example, the length l of the light guide can be 8.5 mm, and the height h of the light guide can be 2.5 mm.

[0060] Among them, the light incident surface receives the light emitted by the light source component, and the light passes through the light incident surface and is emitted to the reflecting surface. The reflecting surface can fully reflect the light, and the light after total reflection passes through the connecting part and is emitted from the light emitting surface of the light emitting part. The reflecting surface fully reflects the light, thereby changing the propagation direction of the light, and realizing the deflection of the light emitted by the light source component. The deflection angle of the light guide component can be designed and adjusted according to actual needs, and the deflection angle of the light guide component can be realized from a smaller angle to a design range close to 180°, so that the light guide component has higher compatibility, and the light guide component is compatible with almost all the deflecting light guide indicator light structures on the market that have requirements for spatial structure; and because the reflecting surface fully reflects the light, the light loss is reduced and the light efficiency of the light emitting surface is improved, so that under the condition that the light source illumination of the light source component is the same, the indicator light of the light guide component of this embodiment is adopted The area illuminated by the indicator light is brighter; compared with the traditional solution of spraying reflective white oil on the surface of the light guide element structure to improve the light guiding efficiency, the light guide realizes the deflection of light through pure optical design, thereby eliminating the process of spraying reflective white oil, reducing the production process of the product, and reducing the production cost of the product; and, compared with the traditional optical fiber transmission solution, the light guide of this embodiment realizes the deflection of light through pure optical design, so that the size of the light guide can be compressed to a smaller range, which helps to reduce the size of the product using the light guide and meet the requirements of product portability and miniaturization; and because the size of the light guide can be designed to be smaller, the space it occupies is also smaller, which reserves more sufficient design space for other components of the product, thereby effectively reducing the difficulty of product design and layout.

[0061] See also Fig. 9 , Fig. 9 A flow chart of a second embodiment of a design method for a light guide provided by the present invention; in one embodiment, the light guide further comprises an incident curved surface portion, the incident curved surface portion is arranged on the light incident surface, the incident curved surface portion protrudes in a direction close to a light source component to form a light incident curved surface, and the light incident curved surface is used to converge light emitted by the light source component; the reflecting surface comprises a first surface and a second surface, one end of the first surface is connected to the light incident surface and is arranged at an angle to the light incident surface, the other end of the first surface is connected to the second surface, the second surface protrudes in a direction away from the light incident surface to form a reflecting curved surface, the reflecting curved surface can totally reflect light emitted from the light emitting surface and converge light emitted from the light emitting surface, so that light reflected by the reflecting curved surface can converge to the light emitting surface; after the step of acquiring shape information of the light guide according to the contour information, the following steps are included:

[0062] S610, adjusting the shape of the light incident curved surface to improve the light efficiency of the light emitting surface;

[0063] S620, adjusting the shape of the reflective curved surface to improve the light efficiency of the light emitting surface;

[0064] S630, determining whether the light effect of the light emitting surface meets the preset light effect;

[0065] S631, if the light effect of the light emitting surface does not meet the preset light effect, repeat the step of adjusting the shape of the light incident curved surface.

[0066] Since a reflective surface is added on the basis of the incident surface, the light will cause the optical path to deviate due to the difference in curvature between the two. Therefore, after the adjustment of the incident surface is completed, the reflective surface needs to be adjusted. The shape of the incident surface can be adjusted by adjusting its eccentricity or its curvature. Similarly, the shape of the reflective surface can be adjusted by adjusting its eccentricity or its curvature. That is, after the curvature and eccentricity of the incident surface are adjusted, the convergence angle of the light beam will change. In order to make the light more convergent and thus improve the light efficiency, it is also necessary to optimize and adjust the curvature and eccentricity of the reflective surface so as to converge the divergent light. Taking the curvature radius of the incident surface as 0.72 and the eccentricity as -0.08 as an example, the curvature of the reflective surface is 0.19, the eccentricity Z1 is 0.25, and Z2 is 0.23 as an example, the light guide can achieve an efficient folding solution in a smaller space.

[0067] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A light guide, characterized in that: The light guide component includes a light incident portion, a connecting portion and a light emitting portion, the connecting portion is relatively arranged at two sides along the Y-axis direction and is respectively connected to the light incident portion and the light emitting portion, a light emitting surface is formed on the side of the light emitting portion away from the light incident portion, the light incident portion is formed with a light incident surface and a reflecting surface, the light incident surface and the light source component are arranged in sequence along the Z-axis direction, and the light incident surface is arranged toward the light emitting side of the light source component, the Z-axis is perpendicular to the Y-axis; the reflecting surface is inclined toward the direction close to the connecting portion and is arranged at an angle to the light incident surface, the reflecting surface can totally reflect the light emitted from the light incident surface to the reflecting surface, and the light reflected by the reflecting surface can pass through the connecting portion and be emitted from the light emitting surface.

2. The light guide member according to claim 1, wherein: The light guide also includes an incident curved portion, which is arranged on the light incident surface. The incident curved portion protrudes toward the direction close to the light source to form a light incident curved surface, and the light incident curved surface is used to converge the light emitted by the light source.

3. The light guide member according to claim 2, wherein: The light incident curved surface is eccentrically arranged relative to the optical axis of the light source component, and is used to converge the light emitted by the light source component to improve the light effect of the light emitting surface.

4. The light guide member according to claim 2, wherein: The reflective surface includes a first surface and a second surface, one end of the first surface is connected to the light incident surface and is set at an angle to the light incident surface, the other end of the first surface is connected to the second surface, and the second surface protrudes in a direction away from the light incident surface to form a reflective curved surface, and the reflective curved surface can converge and totally reflect the light emitted from the light emitting surface, so that the light reflected by the reflective curved surface can converge to the light emitting surface.

5. The light guide member according to claim 4, wherein: The reflective curved surface is a gradual curved surface; And / or, the reflective curved surface is eccentrically arranged relative to the optical axis of the light source component, so as to converge the light emitted to the reflective curved surface to improve the light effect of the light emitting surface; And / or, the number of the incident curved surface portions is multiple, the number of the incident curved surface portions is consistent with the number of the light source components and are arranged in a one-to-one correspondence, and the number of the reflective curved surfaces is consistent with the number of the incident curved surface portions and are arranged in a one-to-one correspondence.

6. The light guide according to any one of claims 1 to 5, characterized in that: The light guide member is an injection molded part.

7. The light guide according to any one of claims 1 to 5, characterized in that: The optical axis of the light source is arranged perpendicular to the optical axis of the light emitting surface.

8. An indicator light, characterized in that: The indicator light comprises a light source, a substrate, and the light guide member according to any one of claims 1 to 7, wherein the light source and the connecting portion are both connected to the substrate.

9. A method for designing a light guide, characterized in that: The light guide comprises a light incident portion, a connecting portion and a light emitting portion, the connecting portion is arranged at two opposite sides along the Y-axis direction and is respectively connected to the light incident portion and the light emitting portion, a light emitting surface is formed on a side of the light emitting portion away from the light incident portion, the light incident portion is formed with a light incident surface and a reflecting surface, the reflecting surface is arranged in an inclined direction close to the connecting portion and is arranged at an angle to the light incident surface; the design method of the light guide comprises the following steps: Acquiring a critical angle value according to material information of the light guide; Obtaining a turning angle range according to the critical angle value; Determining whether the preset turning angle is within the turning angle range; If the preset turning angle is within the turning angle range, obtaining a value of an angle between the light incident surface and the reflecting surface according to the preset turning angle; Acquire profile information of the main optical axis of the light guide according to the angle value; The shape information of the light guide is acquired according to the contour information.

10. The method for designing a light guide according to claim 9, wherein: The light guide also includes an incident curved surface portion, which is arranged on the light incident surface, and the incident curved surface portion protrudes in a direction close to the light source component to form a light incident curved surface, and the light incident curved surface is used to converge the light emitted by the light source component; the reflective surface includes a first surface and a second surface, one end of the first surface is connected to the light incident surface and is arranged at an angle to the light incident surface, the other end of the first surface is connected to the second surface, and the second surface protrudes in a direction away from the light incident surface to form a reflective curved surface, and the reflective curved surface can totally reflect the light emitted from the light emitting surface and converge the light emitted from the light emitting surface, so that the light reflected by the reflective curved surface can converge to the light emitting surface; After the step of acquiring the shape information of the light guide according to the contour information, the following steps are included: Adjusting the shape of the light incident curved surface to improve the light efficiency of the light emitting surface; Adjusting the shape of the reflective curved surface to improve the light efficiency of the light emitting surface; Determining whether the light effect of the light emitting surface meets the preset light effect; If the light effect of the light emitting surface does not meet the preset light effect, the step of adjusting the shape of the light incident curved surface is repeated.

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