Light guide structure, vehicle light structure and vehicle

Abstract

The application provides a light guide structure, a vehicle lamp structure and a vehicle. The light guide structure comprises a body and an LED. The LED is used for providing light. An incident port is arranged on the body. The light can enter the body from the incident port. The incident port is located at an end or a middle of the body. One or more end faces of the body are closed structures and are coated with a paint surface. The closed structure further has a light-transmitting part. The light-transmitting part continuously or discontinuously extends on the paint surface. The light-transmitting part does not have a paint surface at the extending position. The application coats the one or more end faces of the body with black paint, solves the problem of bright spots in the lamp due to the fact that the light guide end cannot be shaded because of insufficient space, and achieves the effect of transferring part of the energy to the outside. The light-transmitting part avoids the phenomenon that all the light is absorbed by the black paint and high temperature is generated. The light-transmitting part solves the problem that the end face coated with black paint may be carbonized due to overheating.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of lighting, in particular to a light guide structure, a vehicle lamp structure and a vehicle. BACKGROUND

[0002] As an important part of vehicle lamp signal light, the daytime running lamp is constantly developing and innovating in terms of shape. The light guide has a large space for modeling and thus becomes a commonly used structure in daytime running lamps.

[0003] In order to avoid bright spots at the end of the light guide, the general method is to block light through other peripheral parts or to install a dark cover at the end of the light guide. This method has high cost and requires a large space. Regardless of which structure is used, the end of the light guide needs to be covered for a length of 10-15 mm. However, as the space of the vehicle lamp becomes smaller and smaller, the above two light blocking structures have no competitiveness. SUMMARY

[0004] In view of the defects in the prior art, the purpose of the present application is to provide a light guide structure, a vehicle lamp structure and a vehicle.

[0005] According to the light guide structure provided by the present application, the light guide structure comprises a body and an LED.

[0006] The LED is used to provide light, and the body is provided with an incident port. The light can enter the body from the incident port. The incident port is located at the end or middle of the body.

[0007] One or more end faces of the body are closed structures coated with a paint surface. The closed structure also has a light-transmitting part. The light-transmitting part continuously or discontinuously extends on the paint surface. The light-transmitting part does not have a paint surface.

[0008] Preferably, the body is long and strip-shaped. The incident port is arranged at one end of the body. The other end of the body is provided with a closed structure having a light-transmitting part and a paint surface.

[0009] Preferably, the light-transmitting part comprises a plurality of straight lines. The plurality of straight lines divide the paint surface into a mesh structure having a plurality of mesh holes.

[0010] Preferably, the paint surface is a black paint surface.

[0011] Preferably, the widths of the plurality of straight lines are equal, and the sizes of the plurality of mesh holes are the same.

[0012] Preferably, the light guide structure further comprises a PCB and a bracket. The LED is mounted on the PCB. The PCB and the body are connected through the bracket.

[0013] Preferably, the body is connected with the support through a connecting piece, and the support is connected with the body through a snap structure.

[0014] Preferably, the light rays enter the body from one end, are reflected in the body, part of the light rays are emitted from the light-transmitting part on the other end, and another part of the light rays are absorbed by the paint surface on the other end.

[0015] According to the application, the light guide structure is adopted.

[0016] According to the application, the car adopts the light guide structure.

[0017] Compared with the prior art, the application has the following beneficial effects:

[0018] 1. The application solves the problem of bright spots in the lamp due to the lack of space for light guide end shading by coating black paint on one or more end faces of the body.

[0019] 2. The application realizes the transmission of part of the energy to the outside by the light-transmitting part, avoids the phenomenon of high temperature caused by the absorption of all light rays by the black paint, and solves the problem of the possible baking of the end face coated with black paint due to overheating. BRIEF DESCRIPTION OF DRAWINGS

[0020] Other features, objects and advantages of the application will become more apparent after reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0021] Figure 1 Fig. 1 is a structural schematic diagram of the application;

[0022] Figure 2 Fig. 2 is a partial enlarged structural schematic diagram of the light guide end face (i.e. the other end of the body) of the application;

[0023] Figure 3 Fig. 3 is a structural schematic diagram of the grid line in the embodiment of the application in which the grid line is thick;

[0024] Figure 4 Fig. 4 is a structural schematic diagram of the grid line in the embodiment of the application in which the grid line is thin;

[0025] Figure 5 Fig. 5 is a schematic diagram of the light path principle of the application;

[0026] Figure 6 Fig. 6 is a schematic diagram of the light guide end face (i.e. the other end of the body) if the light-transmitting part is not provided;

[0027] Figure 7 Fig. 7 is a schematic diagram of the mesh structure principle of the application;

[0028] Fig. 8 shows:

[0029] Detailed Implementation

[0030] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0031] This invention provides a light guide structure, including a body 2 and an LED 1. The LED 1 provides light. The body 2 has an incident port 4 through which the light can enter the body 2. The incident port 4 is located at an end or middle of the body. One or more end faces of the body 2 are closed structures and coated with a paint surface 3. The closed structure also has a light-transmitting portion 5, which extends continuously or discontinuously on the paint surface 3. The light-transmitting portion 5 does not have a paint surface 3 at its extension. The paint surface 3 on the closed structure is to prevent light from focusing at the periphery, resulting in bright spots or light leakage. In a preferred embodiment, the body 2 is a solid structure made of PC or PMMA material.

[0032] like Figure 2 As shown, in a preferred embodiment, the light-transmitting portion 5 includes multiple straight lines that divide the painted surface 3 into a mesh structure with multiple mesh openings. These straight lines are defined as grid lines. All straight lines have equal width, and the mesh openings are of the same size. The painted surface 3 is black. In another preferred embodiment, other dark-colored paints can also be used, such as... Figure 1 As shown, in a preferred embodiment, the body 2 is elongated, with the incident port 4 located at one end of the body 2, and the other end of the body 2 having a closed structure with a light-transmitting portion 5 and a painted surface 3. In a preferred embodiment, the light-transmitting portion 5 is created by attaching a mesh-like jig to the other end of the body 2 during the application of black paint. In a preferred embodiment, the width between the mesh lines may not be completely equal, and the shape and size of the multiple mesh holes may also be different.

[0033] like Figure 1 As shown, the light guide structure also includes a PCB board 6 and a bracket 7. The LED 1 is mounted on the PCB board 6, and the PCB board 6 is connected to the body 2 via the bracket 7. In a preferred embodiment, the body 2 and the bracket 7 are connected by a connector, and the bracket 7 and the body 2 are connected by a snap-fit ​​structure. Preferably, the body 2 and the bracket 7 are connected by screws.

[0034] The working principle of the present application is as follows: the light rays enter the body 2 from one end of the body, reflect in the body, part of the light rays exit from the light-transmitting part 5 on the other end, and the other part of the light rays is absorbed by the paint surface 3 on the other end. As shown in Figure 5 and Figure 7 , the light of the LED 1 enters the body 2 from the incident port 4, the light is reflected by total reflection to the light-emitting surface in the body 2, realizing the function of light guide lighting, finally part of the light rays exit from the light-transmitting part 5 on the other end of the body 2, and the other part of the light rays is absorbed by the paint surface 3 on the other end. As shown in Figure 6 , if only the end face of the light guide (i.e. the other end of the body 2) is painted black, without setting the light-transmitting part, the black paint surface absorbs too much energy, causing high temperature to burn the light guide, resulting in the end face of the light guide turning yellow, affecting the optical performance and appearance. One aspect of the present application is to transfer part of the light energy from the light-transmitting part 5 on the other end of the body 2 to the outside, avoiding the black paint surface absorbing too much energy, causing high temperature to burn the light guide, resulting in the end face of the light guide turning yellow, affecting the optical performance and appearance. On the other hand, the width of the grid lines is relatively thin, which can scatter the exiting light, avoiding the part of the light exiting from the light-transmitting part 5 from forming bright spots due to focusing, affecting the appearance.

[0035] The design of the mesh structure is related to heat. For the same light-emitting surface, the thicker the width of the grid lines, the better the heat dissipation effect of the end face of the light guide (i.e. the other end of the body 2), but the risk of forming light spots is greater than when the width is thin; on the contrary, the thinner the grid lines, the worse the heat dissipation of the end of the light guide than when the width is thick, but the risk of forming light spots is smaller. In a preferred example, the grid lines can be thick lines, as shown in Figure 3 . In another preferred example, the grid lines can be thin lines, as shown in Figure 4 . In a preferred example, the width of the grid lines is 1 mm.

[0036] The specification of the grid lines is defined according to the power of the LED 1 and the length of the light guide. The greater the power of the LED 1 and the shorter the length of the body 2, the more serious the heating of the end face of the light guide (i.e. the other end of the body 2), so the grid lines should be thicker and the density should be greater, which not only ensures good heat dissipation but also avoids bright spots. On the contrary, the smaller the power of the LED 1 and the longer the length of the body 2, the smaller the risk of heat, so the grid lines at the end face of the light guide are preferably thinner and the density of the mesh holes is smaller, which not only ensures that there is no risk of heat but also avoids the problem of light leakage of light spots. The specification of the grid lines is defined to reduce the temperature of the black paint end face of the end of the light guide to below the limit temperature of the light guide material without light leakage or forming bright spots. In a preferred example, the power of the LED is 12.2 W, the length of the light guide is 539 mm, and the width of the grid lines is 1 mm.

[0037] Table 1 is a preferred example of the matching of the total power converted into light by multiple grid widths and different LEDs and the length of the light guide.

[0038] Total power W converted into light by the LED Length of light guide mm Width of grid mm 3.88 539 1.5 2.52 570 1.0 1.8 626 0.6

[0039] Table 1

[0040] As can be seen from the data in Table 1, the higher the total power converted into light by the LED, the shorter the length of the light guide, the more serious the heat problem at the tail end of the light guide, the use of grid lines can solve and improve, and the higher the total power converted into light by the LED, the shorter the length of the light guide, the greater the preferred grid line width setting; the lower the total power converted into light by the LED, the longer the length of the light guide, the heat problem will be alleviated, and the grid line width setting is smaller.

[0041] The black paint coated on the end face of the light guide (i.e. the other end of the body 2) has a concentration requirement. The concentration is determined according to the power of the LED. The higher the concentration, the worse the light transmittance of the black paint, the more serious the heat absorption, and the higher the temperature at the end; on the contrary, the lower the concentration of the black paint, the better the light transmittance, the relatively less heat absorption, and the lower the temperature at the end of the light guide. A reasonable concentration of black paint can ensure that there is no high temperature burn of the light guide due to excessive heat absorption in the case of no light transmission. Generally, the concentration of black paint is about 50%.

[0042] The present application blocks bright spots and saves space by coating black paint on the end face of the body 2, and solves the problem of yellowing of the body 2 caused by heat absorption of the black paint by controlling the concentration of the black paint and the form of grid on the paint surface.

[0043] The present application also provides a car lamp structure using the light guide structure.

[0044] The present application also provides a car using the car lamp structure.

[0045] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0046] The specific embodiments of the present application have been described above. It should be understood that the present application is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essential content of the present application. The embodiments of the present application and the features in the embodiments can be arbitrarily combined without conflict.

Claims

1. A vehicle lamp structure comprising a light guide structure, characterized by, The light guide structure comprises a body (2) and an LED (1); The LED (1) is used for providing light, and the body (2) is provided with an incident port (4), the light can enter the body (2) from the incident port (4), and the incident port (4) is located at an end or a middle of the body; One or more end faces of the body (2) are closed structures, and are coated with a paint surface (3), and the closed structures further have light-transmitting portions (5), the light-transmitting portions (5) continuously or discontinuously extend on the paint surface (3), and the light-transmitting portions (5) do not have the paint surface (3) where they extend; The light-transmitting portions (5) comprise a plurality of straight lines, and the plurality of straight lines divide the paint surface (3) into a mesh structure with a plurality of eyelet holes. Light from the LED (1) enters the body (2) from the incident port (4), is reflected by total reflection to a light-emitting surface in the body (2), realizes the light guide lighting function, and finally part of the light is emitted from the light-transmitting portions (5) on the other end of the body (2), and another part of the light is absorbed by the paint surface (3) on the other end.

2. The vehicle lamp structure according to claim 1, characterized by The body (2) is in a strip shape, the incident port (4) is arranged at one end of the body (2), and the other end of the body (2) is provided with a closed structure with the light-transmitting portions (5) and the paint surface (3).

3. The vehicle lamp structure according to claim 1, characterized by The paint surface (3) is a black paint surface.

4. The vehicle lamp structure according to claim 1, characterized by The widths of the plurality of straight lines are equal, and the sizes of the plurality of eyelet holes are the same.

5. The vehicle lamp structure according to claim 2, characterized by The light guide structure further comprises a PCB (6) and a bracket (7), the LED (1) is mounted on the PCB (6), and the PCB (6) and the body (2) are connected through the bracket (7).

6. The vehicle lamp structure according to claim 5, characterized by The body (2) and the bracket (7) are connected through a connecting piece, and the bracket (7) and the body (2) are connected through a buckle structure.

7. The vehicle lamp structure according to claim 2, characterized by The light enters the body (2) from one end of the body, is reflected in the body, part of the light is emitted from the light-transmitting portions (5) on the other end, and another part of the light is absorbed by the paint surface (3) on the other end.

8. An automobile characterized by comprising: The vehicle lamp structure of claim 1 is adopted.

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