Light guide structure, vehicle lamp and vehicle

Abstract

The application discloses a light guide structure, a vehicle lamp and a vehicle, and relates to the technical field of transportation. The light guide structure comprises a light guide body and a light collector. The light guide body has a light-in side and a light-out side. At least part of the device surface of the light collector is configured as a light collecting curved surface, which is configured to gather external light. At least one concave curved surface is arranged on the device surface of the light collector. The concave curved surface is arranged in a recessed manner towards the inside of the light collector. The concave curved surface has a first curvature radius. The envelope curved surface of the device surface where the concave curved surface is located has a second curvature radius. The first curvature radius is smaller than the second curvature radius. Therefore, the light collector can gather light with a wider angle through the light collecting curved surface with a larger curvature radius, thereby being beneficial to improving the illumination distance and the illumination brightness. Based on the refraction effect of light, the concave curved surface with a smaller curvature radius on the light collector can make the light passing through the light collector more uniform and more divergent in direction, thereby being beneficial to improving the light uniformity.

Description

Technical Field

[0001] This utility model relates to the field of transportation technology, and in particular to a light guide structure, vehicle lamp, and vehicle. Background Technology

[0002] For vehicles such as gasoline-powered cars, electric cars, new energy vehicles, and hybrid vehicles, headlights, taillights, and other lights are usually installed on the vehicle body to perform functions such as brake lights, turn signals, brake lights, rear fog lights, and position lights, respectively.

[0003] While the headlights perform functions such as position lights, the uniformity of the light needs to be improved. Utility Model Content

[0004] The main purpose of this application is to propose a light guide structure, a vehicle lamp, and a vehicle to improve the uniformity of light.

[0005] To achieve the above objectives, the light guide structure proposed in this application is used in automotive lights. The light guide structure includes a light guide body and a light concentrator. The light guide body has an incident light side and an exit light side, and the light concentrator is connected to the incident light side. At least a portion of the surface of the light concentrator is configured as a focusing curved surface, which is configured to focus and conduct external light into the light guide body. The light guide body is configured to conduct light outward from the exit light side. At least one concave curved surface is provided on the surface of the light concentrator, which is recessed towards the interior of the light concentrator. The concave curved surface has a first radius of curvature. The envelope surface of the surface of the device where the concave curved surface is located has a second radius of curvature, and the first radius of curvature is smaller than the second radius of curvature.

[0006] In some implementations, at least a portion of the surface of the light-concentrating device is configured as a reflective surface, which is configured to reflect light entering the light-concentrating device to the light guide body, and at least one of the light-concentrating surface and the reflective surface has the concave surface.

[0007] In some implementations, the concentrator includes a protrusion and a protrusion ring, the protrusion and the protrusion ring being connected to the light-incident side of the light guide body, respectively; the protrusion ring is sleeved outside the protrusion, and the device surface of the concentrator includes the outer surface of the protrusion and the outer surface of the protrusion ring; the protrusion has a first sidewall facing the protrusion ring, the first sidewall being constructed as the concentrating surface, the concentrating surface of the first sidewall having the concave surface, the concave surface of the first sidewall being recessed toward the interior of the protrusion.

[0008] In some implementations, the protruding ring has a second sidewall facing the protrusion, the second sidewall being configured to allow external light to enter the protruding ring; the protruding ring also has a third sidewall facing away from the protrusion, at least a portion of the third sidewall being configured as the reflective surface, the reflective surface on the third sidewall being configured to reflect light entering the protruding ring to the light-incident side of the light guide body; the reflective surface on the third sidewall has at least one concave surface, the concave surface on the third sidewall being recessed toward the interior of the protruding ring, the concave surface on the third sidewall being configured to reflect light entering the protruding ring to the light-incident side of the light guide body.

[0009] In some implementations, the ratio of the second radius of curvature of the envelope surface of the first sidewall to the first radius of curvature of the concave surface on the first sidewall is greater than or equal to 3 and less than or equal to 12.

[0010] In some implementations, the first radius of curvature of the concave surface on the first sidewall is greater than or equal to 1 mm and less than or equal to 3.5 mm, and the second radius of curvature of the envelope surface of the first sidewall is greater than or equal to 8 mm and less than or equal to 15 mm.

[0011] In some implementations, the ratio of the radius of curvature of the envelope surface of the third sidewall to the first radius of curvature of the concave surface on the third sidewall is greater than or equal to 1.5 and less than or equal to 5.

[0012] In some implementations, the first radius of curvature of the concave surface on the third sidewall is greater than or equal to 7 mm and less than or equal to 10 mm, and the radius of curvature of the envelope surface of the third sidewall is greater than or equal to 15 mm and less than or equal to 25 mm.

[0013] In some implementations, the ratio of the second radius of curvature to the first radius of curvature is greater than or equal to 1.5 and less than or equal to 12.

[0014] This application also provides a vehicle lamp, which includes a light-emitting element and the aforementioned light guide structure, wherein the side of the light-emitting element that outputs light faces the light-concentrating element.

[0015] In some implementations, the distance between the end of the light-emitting body and the end of the concentrator along the central axis of the output light of the light-emitting body is greater than or equal to 0.1 mm and less than or equal to 3 mm.

[0016] In some implementations, the light guide body is a light guide plate, the edge of the light guide plate is the light-incident side, and the end face of the light guide plate away from the light-incident side is the light-emitting side; at one end of the light guide plate having the light-incident side, the surface of the light guide plate facing away from the light-incident side has an inclined surface, and the inclined surface is positioned opposite to the light-incident side; the light guide plate is configured to conduct light from the inclined surface to the light-emitting side for output; at least one of the surface of the light guide plate having the light-incident side and the surface of the light guide plate facing away from the light-incident side has a texture, and the texture is configured to output outward a portion of the light conducted from the inclined surface to the light-emitting side.

[0017] In some implementations, the vehicle headlight further includes at least one of a first light shield and a second light shield, wherein the light guide plate of the light guide body has a light-incident side that is positioned opposite to the first light shield, and the light guide plate of the light guide body has a side facing away from the light-incident side that is positioned opposite to the second light shield.

[0018] In some implementations, the vehicle light also includes a circuit board, and the light-emitting body is electrically connected to the circuit board; the light guide plate of the light guide body has a connecting post on the light-incident side, and the circuit board and the first light shield of the vehicle light are respectively connected to the connecting post.

[0019] In some implementations, the light guide plate of the light guide body is provided with two connecting posts, the circuit board of the vehicle lamp is provided with two first connecting through holes, the first light shield of the vehicle lamp is provided with a connecting frame on the side facing away from the light guide plate, the connecting frame is provided with two second connecting through holes, the first connecting post passes through the first first connecting through hole and the first second connecting through hole respectively; the second connecting post abuts against the side of the circuit board facing the light guide plate, and the vehicle lamp also includes a fastener, the fastener passes through the second second connecting through hole and the second first connecting through hole in sequence and is connected to the second connecting post.

[0020] In some implementations, the vehicle headlight further includes a housing having a light outlet; the light emitter and the light guide structure are respectively disposed within the housing, and the light emitting side is positioned opposite to the light outlet.

[0021] This application also provides a vehicle that includes the aforementioned vehicle lights.

[0022] The beneficial effects of this utility model are as follows: By setting the light guide structure to include a light guide body and a light concentrator, the light guide body has an incident light side and an exit light side, and the light concentrator is connected to the incident light side; at least a portion of the surface of the light concentrator is constructed as a focusing curved surface, which is configured to concentrate and conduct external light into the light guide body, and the light guide body is configured to conduct light outward from the exit light side; at least one concave curved surface is provided on the surface of the light concentrator, which is recessed towards the interior of the light concentrator, and the concave curved surface has a first radius of curvature; the envelope surface of the surface of the light concentrator where the concave curved surface is located has a second radius of curvature, and the first radius of curvature is smaller than the second radius of curvature, so that the light concentrator can concentrate light with a wider angle through the focusing curved surface with a larger radius of curvature, thereby improving the illumination distance and illumination brightness; based on the refraction effect of light, the concave curved surface with a smaller radius of curvature on the light concentrator can make the light passing through the light concentrator more uniform and more divergent, thereby improving the uniformity of the light. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 A schematic diagram of an embodiment of the vehicle provided by this utility model; Figure 2 A schematic diagram of an embodiment of the vehicle light provided by this utility model; Figure 3 An exploded view of an embodiment of the vehicle light provided by this utility model; Figure 4 A partial structural schematic diagram of an embodiment of the vehicle lamp provided by this utility model; Figure 5 for Figure 4 A magnified view of a section at point A in the middle; Figure 6 A top view of a partial structure of an embodiment of the vehicle lamp provided by this utility model; Figure 7 for Figure 6 A cross-sectional view at position BB in the middle; Figure 8 for Figure 7 A magnified view of a section at point C; Figure 9 A comparative diagram showing the use of an embodiment of the vehicle light provided in this application; Figure 10 Another comparative illustration of the use of an embodiment of the vehicle light provided in this application; Figure 11 Another comparative illustration of the use of an embodiment of the vehicle light provided in this application; Figure 12 Another comparative illustration of the use of an embodiment of the vehicle light provided in this application; Figure 13 Another comparative diagram showing the use of an embodiment of the vehicle light provided in this application.

[0025] Explanation of icon numbers: 10. Vehicle; 11. Headlight; 12. Light-emitting element; 13. Circuit board; 131. First connecting through hole; 14. Fastener; 15. First light shield; 151. Connecting bracket; 152. Second connecting through hole; 16. Second light shield; 17. Shell; 171. Light outlet; 200. Light guide structure; 210. Light guide body; 211. Light input side; 212. Light output side; 213. Inclined surface; 214. Connecting column; 220. Concentrator; 221. Protrusion; 222. Protruding ring; 223. Focusing surface; 224. Reflective surface; 225. Concave surface.

[0026] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0028] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0029] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0030] For vehicles such as gasoline-powered cars, electric cars, new energy vehicles, and hybrid vehicles, headlights, taillights, and other lights are usually installed on the vehicle body to perform functions such as brake lights, turn signals, brake lights, rear fog lights, and position lights, respectively.

[0031] When vehicle headlights perform functions such as position lights, the uniformity of the light needs improvement. In related technologies, LED headlights (LED, Light Emitting Diode), halogen lamps, and xenon lamps typically require concentrators such as convex lenses and Fresnel lenses to focus the light, thereby increasing illumination distance and brightness. However, in some cases, due to the focusing effect of the concentrator and the relatively dispersed nature of the light-emitting elements such as the LED chips, insufficient uniformity may occur.

[0032] Therefore, this application proposes a light guide structure, a vehicle lamp, and a vehicle to improve the uniformity of light. The vehicle can be a gasoline-powered vehicle, an electric vehicle, a new energy vehicle, or a hybrid vehicle, and the vehicle lamp can be a headlight or taillight that performs functions such as brake lights, turn signals, braking lights, rear fog lights, and position lights.

[0033] In one embodiment, refer to Figure 1 ,in Figure 1 A schematic diagram of a vehicle 10 in this embodiment is shown; the vehicle 10 includes headlights 11, and may also include a body, wheel assembly, power system, etc. The body has a passenger compartment. A battery pack, generator, or other power source may also be installed on the vehicle body to provide power to the headlights 11 via an electrical connection.

[0034] Reference Figure 2 and Figure 3 ,in Figure 2 A schematic diagram of the headlight 11 in this embodiment is shown. Figure 3 An exploded view of the vehicle headlight 11 in this embodiment is shown. The vehicle headlight 11 includes a light-emitting element 12 and a light guide structure 200, which can be understood as the light guide structure 200 being used in the vehicle headlight 11. The light-emitting element 12 can be understood as a component capable of converting energy such as electricity into light; for example, the light-emitting element 12 can be an LED bead, a halogen bead, etc. The light guide structure 200 includes a light guide body 210 and a concentrator 220. The side of the light-emitting element 12 that outputs light faces the concentrator 220. The concentrator 220 can be understood as a device capable of focusing the light output from the light-emitting element 12; for example, the concentrator 220 can be a convex lens, a Fresnel lens, etc.

[0035] The light guide body 210 has an incident light side 211 and an exit light side 212, for example, the incident light side 211 and the exit light side 212 are respectively located at Figure 3 The light guide body 210 is located on the upper left and right sides. The light concentrator 220 is connected to the light input side 211. For example, the light concentrator 220 and the light guide body 210 can be integrally molded using injection molding or other methods to achieve the connection, or they can be connected through methods such as abutment, snap-fit, or partial bonding after being molded separately. The light guide body 210 can be understood as a structure capable of conducting the light focused by the light concentrator 220, thereby ultimately outputting the conducted light from the light output side 212 to the external environment. In some embodiments, the light guide body 210 can be a light guide plate, which can be understood as the light guide body 210 being plate-shaped and constructed to guide light. For example, the light guide plate can be made of optical-grade acrylic sheet or PC (Polycarbonate) sheet.

[0036] In some implementations, refer to Figure 3 The light guide body 210 is a light guide plate, and the light emitting side 212 is located on the end face of the light guide plate (e.g., located on the end face of the light guide plate). Figure 3 In the case of the right end face (in the case of the light guide structure 200), the light guide structure 200 may include at least two light emitters 12 and at least two light concentrators 220; the light emitters 12 and the light concentrators 220 are positioned correspondingly, so that the light emitted by each light emitter 12 can be focused by the corresponding light concentrator 220; wherein, each light emitter 12 is arranged along the length direction of the light emitting side 212, and each light concentrator 220 is arranged along the length direction of the light emitting side 212, for example, respectively along the length direction of the light emitting side 212. Figure 3 The light guide structure 200 is arranged from the lower left to the upper right, which helps to form a uniform strip-shaped light-emitting area on the light-emitting side 212.

[0037] In some implementation methods, refer to Figure 3 , Figure 4 and Figure 5 ,in Figure 4 A partial structural schematic diagram of the headlight 11 in this embodiment is shown. Figure 5 for Figure 4 A magnified view of a portion at point A; when the light-emitting element 12 is configured as an LED or other power-consuming device, the vehicle lamp 11 may also include a circuit board 13. The light-emitting element 12 is electrically connected to the circuit board 13, thereby providing power to the light-emitting element 12. The circuit board 13 can be understood as a driver board, i.e., a plate-shaped component that drives the vehicle lamp 11 to emit light. For example, the circuit board 13 can be configured as a PCB (Printed Circuit Board), FPC (Flexible Printed Circuit), etc. It is understood that the vehicle lamp 11 may also not include the circuit board 13; for example, the light-emitting element 12 can receive driving power from the external environment via wires.

[0038] In some embodiments, the vehicle light 11 may further include at least one of a first light shield 15 and a second light shield 16, wherein the vehicle light 11 may include only the first light shield 15 or the second light shield 16, or the vehicle light 11 may be as follows: Figure 3 The diagram includes both a first light-shielding plate 15 and a second light-shielding plate 16. The light guide plate of the light guide body 210, with its light-incident side 211, is positioned opposite to the first light-shielding plate 15, for example... Figure 3 The upper surface of the light guide plate of the light guide body 210 is positioned opposite to the first light shield 15, which means that the first light shield 15 can cover the corresponding surface, thus helping to prevent light leakage; the surface of the light guide plate of the light guide body 210 facing away from the light incident side 211 is positioned opposite to the second light shield 16, for example... Figure 3 The lower side of the light guide plate of the central light guide body 210 is positioned opposite to the second light shield 16. This can be understood as the second light shield 16 covering the corresponding plate surface, which helps to prevent light leakage.

[0039] It is understood that the light guide plate of the light guide body 210 can reduce light leakage through total internal reflection, so the vehicle lamp 11 may not include the first light shield 15 and the second light shield 16. This embodiment does not limit this.

[0040] Furthermore, the light guide plate of the light guide body 210, which has an incident light side 211, may have a connecting post 214, for example... Figure 3The upper side panel of the light guide body 210 has a connecting post 214. This connecting post 214 can be integrally formed with the light guide body 210 through injection molding or other methods, or the connecting post 214 and the light guide body 210 can be separately formed and connected through subsequent bonding, insertion, snap-fit, or other methods. The circuit board 13 and the first light shield 15 of the vehicle lamp 11 are respectively connected to the connecting post 214, thereby providing installation positions and space for the circuit board 13 and the first light shield 15, thus improving the ease of installation for the circuit board 13 and the first light shield 15.

[0041] In some implementation methods, refer to Figure 3 The light guide plate of the light guide body 210 is provided with two connecting posts 214. These two connecting posts 214 can be set at intervals, and of course, these two connecting posts 214 can also be connected to each other. The circuit board 13 of the vehicle lamp 11 is provided with two first connecting through holes 131. These first connecting through holes 131 can be set as round holes, waist-shaped holes, etc.

[0042] The first light shield 15 of the headlight 11 has a connecting bracket 151 on the side opposite to the light guide plate, for example... Figure 3 The upper side of the first light-shielding plate 15 is provided with the connecting frame 151, which can be formed by components such as plates and rods; the connecting frame 151 is provided with two second connecting through holes 152; the second connecting through holes 152 can be set as round holes, oblong holes, etc., for example, it can be the first second connecting through hole 152 (e.g. Figure 3 , Figure 4 The second connecting through hole 152 on the upper right side is set as an oblong hole, and the second connecting through hole 132 is set as a round hole.

[0043] Reference Figure 4 and Figure 6 ,in Figure 6 A top view of a partial structure of the headlight 11 in this embodiment is shown; the first connecting post 214 passes through the first first connecting through hole 131 and the first second connecting through hole 152, for example... Figure 3 and Figure 4 The connecting post 214 on the upper right side passes through the first first connecting through hole 131 and the first second connecting through hole 152 respectively; when the first second connecting through hole 152 is set as an oblong hole, the first light shield 15 corresponding to the connecting bracket 151 can be adjusted relative to the light guide plate, thereby making it easier to avoid light leakage by adjusting the position.

[0044] In addition, the second connecting post 214 abuts against the side of the circuit board 13 facing the light guide plate, for example... Figure 3 and Figure 4The connecting post 214 on the lower left side abuts against the lower side of the circuit board 13; the headlight 11 may also include a fastener 14, which can be a screw, bolt, rivet, etc. The fastener 14 passes through the second second connecting through hole 152 and the second first connecting through hole 131 in sequence and is connected to the second connecting post 214, for example, with... Figure 3 and Figure 4 The connecting post 214 on the lower left side is used for connection, such as by threaded connection or riveting, so that the circuit board 13, the first light shield 15 and the light guide plate of the light guide body 210 can be fixed to each other conveniently and quickly.

[0045] Of course, the circuit board 13 and the first light shield 15 can also be installed through other connection methods such as edge alignment or mounting to the vehicle body, and this embodiment does not limit this. It is understood that the second light shield 16 can be installed with the light guide plate of the light guide body 210 through other pillars, and the second light shield 16 can also be installed through other connection methods such as edge alignment or mounting to the vehicle body.

[0046] In some implementation methods, refer to Figure 2 and Figure 3 The headlight 11 may also include a housing 17, which may include connected lamp housings (e.g., Figure 3 The left side portion of the inner casing 17) and the lampshade (e.g.) Figure 3 (Right side portion of the inner casing 17). In addition, the casing 17 has a light outlet 171; the light emitter 12 and the light guide structure 200 are respectively disposed inside the casing 17, so that they can be protected by the casing 17; the light emitting side 212 is positioned opposite to the light outlet 171, so that light can be output to the external environment from the light emitting side 212 and the light outlet 171.

[0047] In addition, refer to Figure 7 and Figure 8 ,in Figure 7 for Figure 6 A cross-sectional view at position BB. Figure 8 for Figure 7A partial enlarged view at point C shows that at least a portion of the surface of the concentrator 220 is configured as a focusing surface 223, which is designed to focus and guide external light into the light guide body 210. Referring to the above description, the light guide body 210 is configured to guide light outward from the light-emitting side 212. The surface of the concentrator 220 has at least one concave surface 225, which is recessed towards the interior of the concentrator 220. The concave surface 225 has a first radius of curvature; the envelope surface of the surface containing the concave surface 225 has a second radius of curvature, and the first radius of curvature is smaller than the second radius of curvature. For example, in some embodiments, the ratio of the second radius of curvature to the first radius of curvature is greater than or equal to 1.5 and less than or equal to 12; for example, the ratio of the second radius of curvature to the first radius of curvature can be 1.5, 4, 6, 8, 10, or 12.

[0048] In some embodiments, the focusing surface 223 or its envelope surface can be a convex spherical surface, which can be understood as a spherical surface protruding outwards from the external environment; in addition, the concave surface 225 can also be a spherical surface. Taking the focusing surface 223 and the concave surface 225 as examples where both are spherical, the first radius of curvature being smaller than the second radius of curvature can be understood as the sphere enclosed by the concave surface 225 being smaller than the sphere enclosed by the focusing surface 223. It is understood that the concave surface 225 can be disposed on the focusing surface 223; of course, the concave surface 225 can be disposed on the surface of the condenser 220 outside the focusing surface 223, and this embodiment does not limit this.

[0049] Among them, reference Figure 5 and Figure 8 Taking a concave surface 225 on a focusing surface 223 as an example, at least two interconnected concave surfaces 225 can be provided on the focusing surface 223, and each interconnected concave surface 225 can cover the entire focusing surface 223; in this case, the size of the concave surface 225 can be characterized by the radius of curvature of its own envelope surface (i.e., the second radius of curvature mentioned above).

[0050] Of course, each concave surface 225 may not completely cover the focusing surface 223. It can be understood that a portion of the focusing surface 223 does not have a concave surface 225. In this case, the size of the concave surface 225 can be characterized by the radius of curvature of its own envelope surface (i.e., the second radius of curvature mentioned above), or by the radius of curvature of the portion of the focusing surface 223 where the concave surface 225 is not provided. The radius of curvature of the portion of the focusing surface 223 where the concave surface 225 is not provided can be equal to the radius of curvature of the envelope surface of the concave surface 225 itself.

[0051] The light-concentrating curved surface 223 and the concave curved surface 225 can be integrally formed by injection molding or other methods; or, the light-concentrating curved surface 223 can be formed first, and then the concave curved surface 225 can be formed by machining or other methods. This embodiment does not limit this.

[0052] As can be seen from the above description, the light concentrator 220 in the light guide structure 200 of this embodiment can focus light with a wider angle through the light concentrating surface 223 with a larger radius of curvature, which is beneficial to improving the lighting distance and lighting brightness; based on the refraction effect of light, the concave surface 225 with a smaller radius of curvature on the light concentrator 220 can make the light passing through the light concentrator 220 more uniform and more divergent, which is beneficial to improving the uniformity of the light.

[0053] In some implementation methods, refer to Figure 8 At least a portion of the surface of the concentrator 220 can be configured as a reflective surface 224, which is configured to reflect light entering the concentrator 220 to the light guide body 210, for example... Figure 8 The light rays from the left side of the light-emitting element 12 (as shown by the dashed arrow in the figure) enter the concentrator 220 and are reflected by the reflective surface 224 to continue propagating. At least one of the concentrating surface 223 and the reflective surface 224 has a concave surface 225. For example, both the concentrating surface 223 and the reflective surface 224 may have concave surfaces 225, or only one of the concentrating surface 223 and the reflective surface 224 may have a concave surface 225. This embodiment does not limit this. It is understood that for light-emitting elements 12 in the form of LED beads, their emission angle is relatively large, for example, the emission angle of an LED bead is approximately 120 degrees. In this case, the reflective surface 224 facilitates the entry of more light rays into the light guide body 210 for continued propagation. At least one of the focusing surface 223 and the reflecting surface 224 on the focusing surface 223 is provided with a concave surface 225. When more light is propagated by the light guide body 210, it is beneficial to make the light more uniform and more diffuse, thereby improving the uniformity of the light.

[0054] In some implementation methods, refer to Figure 5 and Figure 8The condenser 220 includes a protrusion 221 and a protrusion ring 222, which are respectively connected to the light-incident side 211 of the light guide body 210. This connection can be either integrally formed or formed separately. The protrusion 221 can be understood as a component protruding relative to a side structure, and the protrusion ring 222 can be understood as a ring-shaped structure protruding relative to a side structure. Furthermore, the protrusion ring 222 is sleeved outside the protrusion 221, and the device surface of the condenser 220 includes the outer surface of the protrusion 221 and the outer surface of the protrusion ring 222. In some embodiments, the condenser 220 including the protrusion 221 and the protrusion ring 222 can be configured as a Fresnel lens.

[0055] Among them, reference Figure 8 The protrusion 221 has a first side wall facing the protrusion ring 222. The first side wall is constructed as the aforementioned focusing surface 223. The focusing surface 223 of the first side wall is provided with the aforementioned concave surface 225. The concave surface 225 on the first side wall is recessed toward the interior of the protrusion 221.

[0056] In this embodiment, by including a protrusion 221 and a protrusion ring 222 in the concentrator 220, the ease of manufacturing the concentrator 220 is improved.

[0057] In some implementation methods, refer to Figure 8 The protruding ring 222 has a second sidewall facing the protruding body 221, for example, the second sidewall is... Figure 8 The right side wall of the raised ring 222; the second side wall is configured to allow external light to enter the raised ring 222, for example... Figure 8 The light rays from the left side of the light-emitting body 12 can enter the protruding ring 222 through the second sidewall. The protruding ring 222 also has a third sidewall facing away from the protrusion 221, for example, the third sidewall is... Figure 8 The left side wall of the raised ring 222; wherein, at least a portion of the third side wall is constructed as the aforementioned reflective surface 224, the reflective surface 224 on the third side wall is constructed to reflect the light entering the raised ring 222 to the light-incident side 211 of the light guide body 210, thereby increasing the total amount of light that continues to propagate; in addition, the reflective surface 224 on the third side wall is provided with at least one of the aforementioned concave surfaces 225, the concave surfaces 225 on the third side wall are recessed toward the interior of the raised ring 222, the concave surfaces 225 on the third side wall are constructed to reflect the light entering the raised ring 222 to the light-incident side 211 of the light guide body 210, thereby increasing the total amount of light that continues to propagate, and making the light more uniform and more diffused through the concave surfaces 225 on the third side wall.

[0058] In some implementations, the ratio of the second radius of curvature of the envelope surface of the first sidewall to the first radius of curvature of the concave surface 225 on the first sidewall is greater than or equal to and less than or equal to 3 and less than or equal to 12, for example, greater than or equal to 5 and less than or equal to 10, which is beneficial to further make the light more uniform and more diffuse, thereby improving the uniformity of the light.

[0059] In some embodiments, the first radius of curvature of the concave surface 225 on the first sidewall is greater than or equal to 1 mm and less than or equal to 3.5 mm, for example, greater than or equal to 1.2 mm and less than or equal to 3 mm; in addition, the second radius of curvature of the envelope surface of the first sidewall is greater than or equal to 8 mm and less than or equal to 15 mm, for example, greater than or equal to 9 mm and less than or equal to 13 mm, which is beneficial to further make the light more uniform and more diffuse, thereby improving the uniformity of the light.

[0060] In some implementations, the ratio of the radius of curvature of the envelope surface of the third sidewall to the first radius of curvature of the concave surface 225 on the third sidewall is greater than or equal to 1.5 and less than or equal to 5, for example, greater than or equal to 2 and less than or equal to 4, which is beneficial to further make the light more uniform and more diffuse, thereby improving the uniformity of the light.

[0061] In some implementations, the first radius of curvature of the concave surface 225 on the third sidewall is greater than or equal to 7 mm and less than or equal to 10 mm, for example, greater than or equal to 8 mm and less than or equal to 9 mm; in addition, the radius of curvature of the envelope surface of the third sidewall is greater than or equal to 15 mm and less than or equal to 25 mm, for example, greater than or equal to 17 mm and less than or equal to 20 mm, which is beneficial to make the light more uniform and more diffuse, thereby improving the uniformity of the light.

[0062] In some implementation methods, refer to Figure 8 Along the central axis of the output light from the light source 12, for example along Figure 8 In the vertical direction, the distance H between the end of the light-emitting body 12 and the end of the concentrator 220 is greater than or equal to 0.1 mm and less than or equal to 3 mm. For example, the distance H between the end of the light-emitting body 12 and the end of the concentrator 220 can be greater than or equal to 0.2 mm and less than or equal to 1 mm. This helps to avoid light leakage caused by the large light emission angle of the light-emitting body 12. This can increase the total amount of light that continues to propagate, and make the light more uniform and more diffused through the concave curved surface 225 on the third side wall.

[0063] In some implementation methods, refer to Figure 7The edge of the light guide plate is the light-incident side 211, for example, the upper left side of the light guide plate in the figure is the light-incident side 211; the end face of the light guide plate away from the light-incident side 211 is the light-emitting side 212, for example, the right end face of the light guide plate in the figure is the light-emitting side 212. At the end of the light guide plate with the light-incident side 211, the surface of the light guide plate facing away from the light-incident side 211 has an inclined surface 213, for example, in... Figure 7 The light guide plate has an inclined surface 213 on its lower left side. The inclined surface 213 is positioned opposite to the light-incident side 211, meaning that light from the light-incident side 211 can be guided to the inclined surface 213. The light guide plate is configured to guide light from the inclined surface 213 to the light-exit side 212 for output. For example, this can be achieved by... Figure 7 The two side surfaces of the light guide plate (such as the upper and lower side surfaces in the figure) form total internal reflection to reduce light leakage.

[0064] Based on the above, the light guide plate has a light incident side 211 (e.g., Figure 7 The upper side panel of the light guide plate (e.g., the side panel facing away from the light incident side 211). Figure 7 At least one of the lower side panels (of the vehicle) has a textured surface. This texture is configured to allow a portion of the light transmitted from the inclined surface 213 to the light-emitting side 212 to be emitted outwards. This reduces the total amount of light emitted from the light-emitting side 212, thereby reducing the light intensity at the center of the light-emitting side 212 and improving the softness of the emitted light. It is understood that the proportion of light emitted outwards through the textured surface is relatively small. Furthermore, the light emitted outwards through the textured surface can be blocked by the first light-shielding plate 15 or other components of the vehicle 10.

[0065] When using the aforementioned vehicle light 11, refer to Figure 9 ,in Figure 9 A comparative diagram of the use of the headlight 11 in the above embodiment is shown (compared with a scheme in the related art where the focusing surface 223 does not have a concave surface 225); wherein, referring to Figure 9 On the upper part, for a certain amount of light from the middle part of the light-emitting body 12, after passing through the focusing surface 223 (which does not have a concave surface 225) in the aforementioned related technology, the beam size range M11 is approximately 0.2 mm. (Refer to...) Figure 9 On the lower part, when the same amount of light from the middle part of the light source 12 passes through the concave surface 225 of the light-concentrating surface 223 (for example, its radius of curvature is 1.5 mm), the light diffusion angle range is about 30 degrees. The diffused light beam irradiates the inclined surface 213 and is refracted, thereby forming a larger beam of light. Its diffusion size range M12 is about 5 mm, which shows that its diffusion range is expanded by about 25 times, thus making the light more uniform and softer.

[0066] In addition, refer to Figure 10and Figure 11 ,in Figure 10 , Figure 11 Another comparative diagram of the use of the headlight 11 in the above embodiments is shown (compared with the scheme in the related art where the focusing curved surface 223 does not have the concave curved surface 225); wherein, referring to Figure 10 , Figure 11 The upper portion of the light source 12, for a certain amount of light rays passing through the focusing surface 223 (which does not have a concave surface 225) in the aforementioned related technology, has a beam size range M21, M31 of approximately 0.2 mm. (Refer to...) Figure 10 , Figure 11 On the lower part, when the same amount of light from the side part of the light source 12 passes through the concave surface 225 of the light-concentrating surface 223 (for example, its radius of curvature is 2.5 mm), the light diffusion angle range is about 30 degrees. The diffused light beam irradiates the inclined surface 213 and is refracted, thereby forming a larger range of light beam. Its diffusion size range M22 and M32 is about 5 mm. It can be seen that its diffusion range is expanded by about 25 times, thereby making the light more uniform and softer.

[0067] On the other hand, refer to Figure 12 and Figure 13 ,in Figure 12 , Figure 13 Another comparative diagram of the use of the headlight 11 in the above embodiments is shown (compared with the scheme in the related art where the reflective surface 224 does not have the concave surface 225); wherein, referring to Figure 12 , Figure 13 The upper portion of the light source 12, for a certain amount of light rays passing through the reflective surface 224 (which does not have a concave surface 225) in the aforementioned related technology, has a beam size range of approximately 0.2 mm for M41 and M51. (Refer to...) Figure 12 , Figure 13 On the lower part, when the same amount of light from the middle and side parts of the light source 12 passes through the concave surface 225 of the aforementioned reflective surface 224 (for example, its radius of curvature is 8.5 mm), the light diffusion angle range is about 30 degrees. The diffused light beam irradiates the inclined surface 213 and is refracted, thereby forming a larger range of light beam. Its diffusion size range M42 and M52 is about 10 mm, which shows that its diffusion range is expanded by about 50 times, thus making the light more uniform and softer.

[0068] It is understandable that since the headlights and vehicles adopt all the technical solutions of all the above-mentioned light guide structures, they have at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be elaborated here.

[0069] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A light guiding structure, characterized in that, The light guide structure is used in vehicle lights. The light guide structure includes a light guide body and a light concentrator. The light guide body has an incident light side and an exit light side. The light concentrator is connected to the incident light side. At least a portion of the surface of the light concentrator is configured as a focusing curved surface. The focusing curved surface is configured to concentrate and conduct external light into the light guide body. The light guide body is configured to conduct light outward from the exit light side. The device surface of the concentrator is provided with at least one concave surface, which is recessed toward the interior of the concentrator and has a first radius of curvature; the envelope surface of the device surface where the concave surface is located has a second radius of curvature, and the first radius of curvature is smaller than the second radius of curvature.

2. The light guide structure as described in claim 1, characterized in that, At least a portion of the surface of the light-concentrating device is configured as a reflective surface, which is configured to reflect light entering the light-concentrating device to the light guide body, and at least one of the light-concentrating surface and the reflective surface has the concave surface.

3. The light guide structure as described in claim 2, characterized in that, The concentrator includes a protrusion and a protrusion ring, the protrusion and the protrusion ring being connected to the light-incident side of the light guide body respectively; the protrusion ring is sleeved outside the protrusion, and the device surface of the concentrator includes the outer surface of the protrusion and the outer surface of the protrusion ring; The protrusion has a first sidewall facing the protrusion ring. The first sidewall is configured as the focusing surface. The focusing surface of the first sidewall has the concave surface, and the concave surface on the first sidewall is recessed toward the interior of the protrusion.

4. The light guide structure as described in claim 3, characterized in that, The raised ring has a second sidewall facing the raised body, the second sidewall being configured to allow external light to enter the raised ring; the raised ring also has a third sidewall facing away from the raised body, at least a portion of the third sidewall being configured as the reflective surface, the reflective surface on the third sidewall being configured to reflect light entering the raised ring to the light-incident side of the light guide body; the reflective surface on the third sidewall has at least one concave surface, the concave surface on the third sidewall being recessed towards the interior of the raised ring, the concave surface on the third sidewall being configured to reflect light entering the raised ring to the light-incident side of the light guide body; and / or, The ratio of the second radius of curvature of the envelope surface of the first sidewall to the first radius of curvature of the concave surface on the first sidewall is greater than or equal to 3 and less than or equal to 12; and / or, The first radius of curvature of the concave surface on the first sidewall is greater than or equal to 1 mm and less than or equal to 3.5 mm, and the second radius of curvature of the envelope surface of the first sidewall is greater than or equal to 8 mm and less than or equal to 15 mm; and / or, The ratio of the radius of curvature of the envelope surface of the third sidewall to the first radius of curvature of the concave surface on the third sidewall is greater than or equal to 1.5 and less than or equal to 5; and / or, The first radius of curvature of the concave surface on the third sidewall is greater than or equal to 7 mm and less than or equal to 10 mm, and the radius of curvature of the envelope surface of the third sidewall is greater than or equal to 15 mm and less than or equal to 25 mm.

5. The light guide structure as described in any one of claims 1 to 3, characterized in that, The ratio of the second radius of curvature to the first radius of curvature is greater than or equal to 1.5 and less than or equal to 12.

6. A vehicle light, characterized in that, The vehicle headlight includes a light-emitting element and a light guide structure as described in any one of claims 1 to 5, wherein the side of the light-emitting element that outputs light faces the light-concentrating element.

7. The vehicle light as described in claim 6, characterized in that, Along the central axis of the output light from the light source, the distance between the end of the light source and the end of the concentrator is greater than or equal to 0.1 mm and less than or equal to 3 mm.

8. The vehicle light as described in claim 6 or 7, characterized in that, The light guide body is a light guide plate, the edge of the light guide plate is the light-incident side, and the end face of the light guide plate away from the light-incident side is the light-emitting side; at one end of the light guide plate with the light-incident side, the plate surface of the light guide plate facing away from the light-incident side has an inclined surface, and the inclined surface is positioned opposite to the light-incident side; the light guide plate is configured to conduct light from the inclined surface to the light-emitting side for output; at least one of the plate surface of the light guide plate with the light-incident side and the plate surface of the light guide plate facing away from the light-incident side has a texture, and the texture is configured to output outward a portion of the light transmitted from the inclined surface to the light-emitting side.

9. The vehicle light as described in claim 6 or 7, characterized in that, The vehicle headlight further includes at least one of a first light-shielding plate and a second light-shielding plate, wherein the light guide plate of the light guide body has a light-incident side surface that is positioned opposite to the first light-shielding plate, and the light guide plate of the light guide body has a side facing away from the light-incident side that is positioned opposite to the second light-shielding plate; and / or, The vehicle headlight also includes a circuit board, and the light-emitting element is electrically connected to the circuit board; the light guide plate of the light guide body has a connecting post on the light-incident side, and the circuit board and the first light-shielding plate of the vehicle headlight are respectively connected to the connecting post; and / or, The light guide plate of the light guide body is provided with two connecting posts, the circuit board of the vehicle lamp is provided with two first connecting through holes, the first light shield of the vehicle lamp is provided with a connecting frame on the side facing away from the light guide plate, the connecting frame is provided with two second connecting through holes, the first connecting post passes through the first first connecting through hole and the first second connecting through hole respectively; the second connecting post abuts against the side of the circuit board facing the light guide plate, the vehicle lamp also includes a fastener, the fastener passes through the second second connecting through hole and the second first connecting through hole in sequence and is connected to the second connecting post; and / or, The vehicle headlight also includes a housing with a light outlet; the light-emitting element and the light-guiding structure are respectively disposed inside the housing, and the light-emitting side is positioned opposite to the light outlet.

10. A vehicle, characterized in that, The vehicle includes the headlights as described in any one of claims 6 to 9.

Images